Gel pen
By designing elastic rings and limiting parts in a neutral pen, the problem of pen tip shaking is solved, and the writing experience and the stability of the refill is improved.
Patent Information
- Application Number
- CN202422262539.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-14
AI Technical Summary
The pen tip often shaking during use, resulting in poor writing experience.
A neutral pen is designed, which includes a pen neck, a fixing portion, an elastic ring, a refill, a pressure assembly and a limiting member. Through the lateral expansion of the elastic ring and the interference matching of the limiting member, the connection stability between the fixing part and the pen neck is enhanced, and the shaking of the refill is reduced.
It effectively reduces the shaking of the pen tip, improves the writing experience, and allows the refill to be kept stably in the required position after extending, so that it is not easy to shake or retract due to external touch or vibration.
Smart Images
Figure CN223030658U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of stationery design, and in particular, to a gel pen. Background Art
[0002] As one of the most common writing tools, pens are mainly used in scenarios such as learning and office work that require recording. Gel pens are one of the commonly used pens, but there is usually a situation where the pen tip shakes during use, resulting in a poor writing experience.
[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention
[0004] The present disclosure provides a gel pen that can reduce the degree of tip shaking and improve the writing experience.
[0005] According to one aspect of the present disclosure, there is provided a gel pen, comprising:
[0006] A pen neck, including a first through hole and a second through hole that penetrate through, the aperture of the first through hole being smaller than the aperture of the second through hole, and the connecting portion of the first through hole and the second through hole being stepped;
[0007] A fixing portion, including a first section, a second section, and a third section that are sequentially communicated, a flange being provided at an end of the first section away from the second section, the flange extending radially outward; the flange and the second section extend into the pen neck from a side of the first through hole away from the second through hole, and the flange is located on the stepped surface of the connecting portion; the second section is in interference fit with the inner wall of the pen neck, and the third section is provided with a core outlet;
[0008] An elastic ring, disposed on the stepped surface of the connecting portion, and located between the flange and the stepped surface, and filling the gap between the second section and the inner wall of the second through hole;
[0009] A pen core, passing through the pen neck and the fixing portion, the pen core including a first part and a second part that are connected to each other, the diameter of the first part decreasing from a side close to the second part to a side away from the second part;
[0010] A pressure application assembly, disposed on a side of the second part away from the first part, for applying pressure to the second part so that the first part extends out of the core outlet to complete core delivery;
[0011] The limiting member is provided on the inner wall of the third section away from the core outlet; when the refill is not discharging the core, the limiting member is located on the outer periphery of the first part; and when the refill is discharging the core, the limiting member is in interference fit with the second part.
[0012] In an exemplary embodiment of the present disclosure, a plurality of openings are provided on the third section, the plurality of openings are evenly distributed along the circumferential direction of the third section, and the openings penetrate through the side wall of the third section in the radial direction of the third section.
[0013] In an exemplary embodiment of the present disclosure, the elastic ring is a rubber ring.
[0014] In an exemplary embodiment of the present disclosure, the limiting member includes a plurality of protrusions, the protrusions are connected to the inner wall of the third section, and the plurality of protrusions are evenly distributed along the circumferential direction of the third section.
[0015] In an exemplary embodiment of the present disclosure, the protrusion and the fixing portion are of an integral structure.
[0016] In an exemplary embodiment of the present disclosure, the number of the openings is 3 to 6.
[0017] In an exemplary embodiment of the present disclosure, the number of the protrusions is 3 to 6.
[0018] In an exemplary embodiment of the present disclosure, the inner diameter of the third section is smaller than the inner diameter of the second section, and the connection structure between the second section and the third section is in a stepped shape; the second part includes a first connection part and a second connection part connected to each other, the diameter of the second connection part is larger than the diameter of the first connection part, and the gel pen further includes:
[0019] A pen barrel, including a through first open end and a second open end, the first open end is detachably connected to the second end of the pen neck; the refill passes through the first open end and extends towards the second open end;
[0020] A spring, sleeved on the outer periphery of the first connection part, and when in the non-core-discharging state, both ends of the spring are in contact with the stepped surface of the connection structure and the end surface of the second connection part close to the first connection part respectively.
[0021] In an exemplary embodiment of the present disclosure, the gel pen further includes:
[0022] A pen cap, sleeved on the outer periphery of the pen neck and located in the area corresponding to the second through hole.
[0023] In an exemplary embodiment of the present disclosure, the gel pen further includes:
[0024] The pen clip is provided on one side of the pen barrel in a direction perpendicular to the axial direction of the pen barrel, and one end thereof is connected to the second open end of the pen barrel; the pen clip includes a first color portion and a second color portion, and partial areas of the first color portion and the second color portion are laminated.
[0025] For the neutral pen of the present disclosure, when the pressure application assembly is subjected to pressure during refilling, the pressure is transmitted to the first part through the second part of the refill, causing the first part to extend out of the refill outlet to complete refilling. During this process, the elastic ring is compressed and laterally expanded when subjected to pressure, and this lateral expansion causes the elastic ring to tightly fill the gap between the second section and the inner wall of the second through hole, thereby enhancing the connection stability between the fixing portion and the pen neck and reducing the shaking degree of the fixing portion. At the same time, when the refill is refilled, the second part moves toward the side close to the refill outlet. The limiting member starts to contact the second part of the refill and gradually reaches an interference fit state. This interference fit ensures that the refill can be stably held in the required position after extending and will not shake or retract due to slight external touch or vibration, which helps to improve the user writing experience.
[0026] It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot limit the present disclosure. Brief Description of the Drawings
[0027] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.
[0028] Figure 1 It is a schematic diagram of the neutral pen in the embodiment of the present disclosure.
[0029] Figure 2 In the embodiment of the present disclosure Figure 1 An enlarged view of area A.
[0030] Figure 3 It is a front view of the neutral pen in the embodiment of the present disclosure.
[0031] Figure 4 It is a left view of the neutral pen in the embodiment of the present disclosure.
[0032] In the figure: 1. Pen neck; 11. First cylinder; 12. Second cylinder; 13. Step surface of the connection part; 2. Fixed part; 21. First section; 211. Flange; 22. Second section; 23. Third section; 231. Core outlet; 232. Opening; 24. Step surface of the connection structure; 3. Elastic ring; 4. Refill; 41. First part; 42. Second part; 421. First connection part; 422. Second connection part; 5. Pressing assembly; 6. Limiting part; 7. Pen barrel; 8. Spring; 9. Pen cap; 10. Clip. 101. First color part; 102. Second color part. Detailed implementation mode
[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted.
[0034] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification only for convenience, for example, according to the directions of the examples described in the accompanying drawings. It can be understood that if the device of the icon is turned upside down, the component described as "upper" will become the component described as "lower". When a structure is "on" another structure, it may mean that a structure is integrally formed on another structure, or that a structure is "directly" disposed on another structure, or that a structure is "indirectly" disposed on another structure through another structure.
[0035] The terms "a", "an", "the" and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first", "second" and "third" are used only as labels and are not a limitation on the quantity of their objects.
[0036] An embodiment of the present disclosure provides a gel pen, as Figure 1 and Figure 2 shown, the gel pen may include a pen neck 1, a fixed part 2, an elastic ring 3, a refill 4, a pressing assembly 5 and a limiting part 6, wherein:
[0037] The pen neck 1 includes a through first through hole and a second through hole, the aperture of the first through hole is smaller than the aperture of the second through hole, and the connection part of the first through hole and the second through hole is stepped;
[0038] The fixing part 2 includes a first section 21, a second section 22, and a third section 23 that are connected in sequence. At the end of the first section 21 away from the second section 22, there is a flange 211 that extends radially outward; the flange 211 and the second section 22 penetrate into the pen neck 1 from the side of the first through hole away from the second through hole, and the flange 211 is located on the stepped surface 13 of the connecting part; the second section 22 is in interference fit with the inner wall of the pen neck 1, and the third section 23 is provided with a core outlet 231;
[0039] The elastic ring 3 is arranged on the stepped surface 13 of the connecting part, and is located between the flange 211 and the stepped surface, and fills the gap between the second section 22 and the inner wall of the second through hole;
[0040] The refill 4 passes through the pen neck 1 and the fixing part 2. The refill 4 includes a first part 41 and a second part 42 that are connected to each other. The diameter of the first part 41 decreases from the side close to the second part 42 to the side away from the second part 42;
[0041] The pressing assembly 5 is arranged on the side of the second part 42 away from the first part 41, and is used to apply pressure to the second part 42 so that the first part 41 extends out of the core outlet 231 to complete the core outlet;
[0042] The limiting member 6 is arranged on the inner wall of the third section 23 away from the core outlet 231; when the refill 4 does not discharge the core, the limiting member 6 is located on the outer periphery of the first part 41; and when the refill 4 discharges the core, the limiting member 6 is in interference fit with the second part 42.
[0043] For the gel pen of the present disclosure, when discharging the core, when the pressing assembly 5 is subjected to pressure, this pressure is transmitted to the first part 41 through the second part 42 of the refill 4, so that the first part 41 extends out of the core outlet 231 to complete the core outlet. During this process, when the elastic ring 3 is subjected to pressure, it is compressed and expands laterally. This lateral expansion causes the elastic ring 3 to tightly fill the gap between the second section 22 and the inner wall of the second through hole, thereby enhancing the connection stability between the fixing part 2 and the pen neck 1 and reducing the shaking degree of the fixing part 2. At the same time, when the refill 4 discharges the core, the second part 42 moves toward the side close to the core outlet 231. The limiting member 6 starts to contact the second part 42 of the refill 4 and gradually reaches an interference fit state. This interference fit ensures that the refill 4 can be stably maintained in the required position after extension, and will not shake or retract due to slight external touch or vibration, which helps to improve the user's writing experience.
[0044] The following will detail each part of the gel pen of the present disclosure and its specific details:
[0045] The pen neck 1 may be cylindrical. For example, the pen neck 1 may include a first barrel 11 and a second barrel 12 that are interconnected. In the extension direction of the pen neck 1, the outer diameter of the first barrel 11 gradually decreases from the side of the first barrel 11 close to the second barrel 12 to the direction away from the second barrel 12. The pen neck 1 may include a first through hole and a second through hole that are interconnected. The first through hole is located in the first barrel 11, and the second through hole is located in the second barrel 12. The aperture of the first through hole may be smaller than the aperture of the second through hole. The connection between the first through hole and the second through hole is in a step shape. For example, the junction area between the inner wall of the first through hole and the inner wall of the second through hole is in a step shape. The material of the pen neck 1 may be plastic or metal, and the material of the pen neck 1 is not specifically defined herein.
[0046] The fixing part 2 can be used as an inner lining structure in the pen neck 1, and at least part of the fixing part 2 can be arranged in the pen neck 1. For example, the fixing part 2 can also be cylindrical, and can include a first section 21, a second section 22 and a third section 23 that are connected in sequence. The end of the first section 21 away from the second section 22 is provided with a flange 211, and the flange 211 can extend radially outward and can circumferentially surround the outer circumference of the first section 21. The outer diameter of the flange 211 is slightly smaller than the inner diameter of the second through hole. The flange 211 and the second section 22 can extend into the pen neck 1 from the side of the first through hole away from the second through hole, and after the flange 211 extends into the second through hole, it can be located on the step surface 13 of the connecting portion of the first through hole and the second through hole, and the outer wall of the second section 22 is interference fit with the inner wall of the first through hole of the pen neck 1. The end of the third section 23 away from the second section 22 may be provided with a core outlet 231, and the pen core 4 subsequently inserted into the pen neck 1 may be ejected from the core outlet 231 to complete the core outlet. The shape of the core outlet 231 may be circular, elliptical, rectangular or irregular, and is not particularly limited here.
[0047] In an exemplary embodiment of the present disclosure, the inner diameter of the third section 23 is smaller than the inner diameter of the second section 22, and the connection structure between the second section 22 and the third section 23 is stepped, with the step surface facing the second section 22; the diameter of the outer surface of the third section 23 is smaller than the diameter of the outer surface of the second end, and in the extension direction of the fixing portion 2, the outer diameter of the third section 23 gradually decreases from the side of the third section 23 close to the second section 22 to the direction away from the second section 22, and the diameter of the core outlet 231 is smaller than the diameter of any other area in the pen neck 1, so as to limit the pen core 4 to a smaller core outlet range.
[0048] In some embodiments of the present disclosure, the materials of the first section 21 , the second section 22 and the third section 23 may all be plastic, and the first section 21 , the second section 22 and the third section 23 may be an integral structure.
[0049] The elastic ring 3 can be disposed on the step surface 13 at the connection part of the first through hole and the second through hole. The elastic ring 3 can be located between the flange 211 and the step surface 13 at the connection part of the first through hole and the second through hole, and can fill the gap between the second section 22 and the inner wall of the second through hole. When the refill is ejected, the elastic ring 3 is compressed and laterally expanded under pressure. This lateral expansion enables the elastic ring 3 to tightly fill the gap between the second section 22 and the inner wall of the second through hole, helping to enhance the connection stability between the fixing part 2 and the pen neck 1 and reducing the shaking degree of the fixing part 2. For example, the elastic ring 3 can be a rubber ring.
[0050] The refill 4 can pass through the pen neck 1 and the fixing part 2. The refill 4 can include a first part 41 and a second part 42 connected to each other. The first part 41 can be the tip part of the refill 4. The diameter of the first part 41 decreases from the side close to the second part 42 to the side away from the second part 42. This decreasing design not only enables the refill 4 to form a delicate writing stroke when writing, but also ensures that the refill 4 can stably pass through the refill outlet 231 during the extending and retracting processes, reducing jamming or obstruction.
[0051] The second part 42 can be the main body part of the refill 4. The second part 42 can be used to store ink. The second part 42 is tightly connected to the first part 41, jointly constituting the complete refill 4. In an exemplary embodiment of the present disclosure, please continue to refer to Figure 1 As shown, the second part 42 can include a first connecting part 421 and a second connecting part 422 that are connected to each other and internally communicate. Among them, the first connecting part 421 is connected to and communicates with the first part 41. The diameter of the first connecting part 421 is larger than the diameter of the first part 41. The second connecting part 422 is located on the side of the first connecting part 421 away from the first part 41. The diameter of the second connecting part 422 can be larger than the diameter of the first connecting part 421. The relatively large diameter of the second part 42 can provide sufficient storage space for the ink, helping to increase the usage duration of the gel pen of the present disclosure.
[0052] The pressing component 5 is disposed on the side of the second part 42 away from the first part 41. Pressure can be applied to the second part 42 through the pressing component 5 to cause the first part 41 to extend out of the refill outlet 231, completing the ejection of the refill. During the process of pressing the pressing component 5, due to the gradually decreasing diameter of the first part 41 of the refill 4, this thrust can more easily push it out of the refill outlet 231 to complete the ejection action. At the same time, the design of the pressing component 5 also ensures that the user can feel a moderate resistance during the writing process, neither too tight nor too loose, thus providing a comfortable writing experience.
[0053] In some embodiments of the present disclosure, the pressure - applying component 5 may include a pressing member. When the user needs to write, simply pressing the pressing member gently can transfer the pressure to the second part 42 of the refill 4, causing it to receive a forward thrust and thereby pushing out the first part 41 of the refill 4.
[0054] In an exemplary embodiment of the present disclosure, the gel pen of the present disclosure may further include a pen barrel 7 and a spring 8, where:
[0055] The pen barrel 7 may be cylindrical, and it may include a first open end and a second open end that communicate with each other. The first open end is detachably connected to the second end of the pen neck 1, and the refill 4 can pass through the first open end and extend towards the second open end. The cross - section of the pen barrel 7 may be circular, elliptical, polygonal, or irregular, and no special limitation is imposed on the cross - sectional shape of the pen barrel 7 here. The shapes of the cross - sections of the first open end and the second open end may be the same or different, and no special limitation is made here. The material of the pen barrel 7 may be plastic, metal, alloy, etc. Of course, it may also be other materials, which will not be listed one by one here.
[0056] For example, the cross - section of the first open end is circular, and the cross - section of the second end of the pen neck 1 may also be circular; an internal thread may be provided on the inner wall of the first open end of the pen barrel 7, and an external thread may be provided on the outer periphery of the second end of the pen neck 1. The second end of the pen neck 1 can extend into the first open end of the pen barrel 7, and the external thread of the second end of the pen neck 1 can be connected to the internal thread of the first open end of the pen barrel 7. Alternatively, an external thread may be provided on the outer periphery of the first open end of the pen barrel 7, and an internal thread may be provided on the inner wall of the second end of the pen neck 1. The first open end of the pen barrel 7 can extend into the second end of the pen neck 1, and the internal thread of the second end of the pen neck 1 can be connected to the external thread of the first open end of the pen barrel 7.
[0057] The spring 8 can be sleeved on the outer periphery of the first connecting portion 421, and in the non - core - extending state, the two ends of the spring 8 can respectively contact the step surface 24 of the connecting structure and the end surface of the second connecting portion 422 close to the first connecting portion 421. When pressing the second part 42 of the refill 4 through the pressure - applying component 5, the spring 8 can be compressed, and at the same time, the spring 8 can generate an elastic force that acts on the refill 4 in the opposite direction, so that the refill 4 can remain stable and not easily shake after being extended, thereby improving the writing accuracy and comfort.
[0058] The limiting member 6 can be arranged on the inner wall of the third section 23 away from the core outlet 231; when the refill 4 is not delivering the core, the limiting member 6 is located on the outer periphery of the first part 41 of the refill 4; and when the refill 4 is delivering the core, the limiting member 6 is in interference fit with the second part 42 of the refill 4. For example, when delivering the core, the limiting member 6 is in interference fit with the second connecting portion 422 of the second part 42 of the refill 4. During the core delivery process, after pressing the pressing and applying component 5, the second part 42 moves towards the side close to the core outlet 231 accordingly. The limiting member 6 starts to contact the second part 42 of the refill 4 and gradually reaches the state of interference fit. This interference fit ensures that the refill 4 can be stably held in the required position after being extended, and will not shake or retract due to slight external touch or vibration, which helps to improve the user writing experience.
[0059] In an exemplary embodiment of the present disclosure, the limiting member 6 may include a plurality of protrusions, each protrusion can be connected to the inner wall of the third section 23, and the plurality of protrusions can be evenly distributed along the circumferential direction of the third section 23. For example, the number of protrusions can be 3 to 6, for example, it can be 3, 4, 5 or 6. When delivering the core, each protrusion can be in interference fit with the second part 42 of the refill 4 to prevent the refill 4 from shaking during writing and improve the user writing experience. In some embodiments of the present disclosure, the material of the protrusion can be plastic, and the protrusion and the fixing part 2 are of an integral structure.
[0060] In an exemplary embodiment of the present disclosure, a plurality of openings 232 are provided on the third section 23 of the fixing part 2, the plurality of openings 232 can be evenly distributed along the circumferential direction of the third section 23, and each opening 232 can penetrate the side wall of the third section 23 along the radial direction of the third section 23. For example, the number of openings 232 can be 3 to 6, for example, it can be 3, 4, 5 or 6. In some embodiments of the present disclosure, the number of openings 232 can be the same as the number of bosses. For example, both the number of openings 232 and the number of bosses can be 3, and the 3 openings 232 and the 3 bosses can be alternately distributed in sequence along the circumferential direction of the third section 23. When delivering the core, when the second part 42 of the refill 4 penetrates into the third section 23 of the fixing part 2, the second part 42 exerts a force on the boss, and under the action of this force, a certain amount of deformation occurs at the opening 232 to generate an elastic force, and the elastic force reacts on the boss, thereby forcing the boss to embrace the refill 4, thus forming a stable acting force. Compared with the situation of writing shaking due to process tolerances in traditional gel pens, the gel pen of the present application avoids being affected by production tolerances through the cooperation of mechanical structures, and strengthens the stability of the refill 4 during writing work, improving the user writing experience.
[0061] In an exemplary embodiment of the present disclosure, the gel pen of the present disclosure may further include a pen cap 9. The pen cap 9 may be sleeved on the outer periphery of the pen neck 1 and may be located in the area corresponding to the second through hole. For example, a receiving groove recessed radially inward may be provided on the outer peripheral surface of the second barrel 12 of the pen neck 1. The receiving groove may surround the outer peripheral surface of the second barrel 12 in a circle. The pen cap 9 may be disposed in the receiving groove, and the surface of the pen cap 9 may be flush with the surface of the first barrel 11 close to the second barrel 12, so as to avoid the poor writing experience caused by the step difference between the pen cap 9 and the surface of the first barrel 11. In order to protect the fingers, the material of the pen cap 9 may be a material with certain elasticity. For example, the material thereof may be rubber.
[0062] In an exemplary embodiment of the present disclosure, as Figure 1 , Figure 3 and Figure 4 shown, the gel pen of the present disclosure further includes a pen clip 10. The pen clip 10 may be disposed on one side of the pen barrel 7 in a direction perpendicular to the axial direction of the pen barrel 7. One end of the pen clip 10 may be connected to the second open end of the pen barrel 7, so as to facilitate fixing the gel pen of the present disclosure at a position where it needs to be fixed.
[0063] In some embodiments of the present disclosure, the pen clip 10 may include a first color portion 101 and a second color portion 102, and partial regions of the first color portion 101 and the second color portion 102 are laminated. The first color portion 101 and the second color portion 102 have different colors; for example, the color of the first color portion 101 is black, and the color of the second color portion 102 is white; or, the color of the first color portion 101 is yellow, and the color of the second color portion 102 is blue; or, the color of the first color portion 101 is red, and the color of the second color portion 102 is green; of course, the first color portion 101 and the second color portion 102 may also be other colors as long as the two colors are different. The two-color design of the pen clip 10 makes the pen clip 10 more fashionable and beautiful. The contrast or fusion of the two colors can create a unique visual effect and enhance the overall aesthetic feeling of the product. At the same time, through different color combinations, the personalized needs of different users can be met, making the pen clip 10 a small accessory to show personal taste.
[0064] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed by the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.
Claims
1. A gel pen, characterized in that: include: The pen neck comprises a first through hole and a second through hole, wherein the aperture of the first through hole is smaller than the aperture of the second through hole, and the connection part between the first through hole and the second through hole is in a step shape; The fixing part comprises a first section, a second section and a third section which are connected in sequence, wherein the end of the first section away from the second section is provided with a flange, and the flange extends radially outward; the flange and the second section extend into the pen neck from a side of the first through hole away from the second through hole, and the flange is located on the step surface of the connecting part; the second section is interference-fitted with the inner wall of the pen neck, and the third section is provided with a core outlet; an elastic ring, provided on the step surface of the connecting portion, located between the flange and the step surface, and filling a gap between the second section and the inner wall of the second through hole; A pen core, passing through the pen neck and the fixing portion, the pen core comprising a first part and a second part connected to each other, wherein a diameter of the first part decreases from a side close to the second part to a side away from the second part; A pressure-applying assembly, disposed on a side of the second part away from the first part, and used to apply pressure to the second part so that the first part extends out of the core outlet to complete the core outlet; A limiting member, arranged on an inner wall of the third section away from the core outlet; When the pen core is not ejected, the limiting member is located at the outer periphery of the first portion; and when the pen core is ejected, the limiting member is interference fit with the second portion.
2. The gel pen according to claim 1, characterized in that: The third section is provided with a plurality of openings, the plurality of openings are evenly distributed along the circumference of the third section, and the openings penetrate the side wall of the third section along the radial direction of the third section.
3. The gel pen according to claim 1, characterized in that: The elastic ring is a rubber ring.
4. The gel pen according to claim 1, characterized in that: The limiting member includes a plurality of protrusions, the protrusions are connected to the inner wall of the third section, and the plurality of protrusions are evenly distributed along the circumference of the third section.
5. The gel pen according to claim 4, characterized in that: The protrusion and the fixing portion are in an integrated structure.
6. The gel pen according to claim 2, characterized in that: The number of the openings is 3 to 6.
7. The gel pen according to claim 4, characterized in that: The number of the protrusions is 3 to 6.
8. The gel pen according to any one of claims 1 to 7, characterized in that: The inner diameter of the third section is smaller than the inner diameter of the second section, and the connection structure between the second section and the third section is stepped; the second part includes a first connecting portion and a second connecting portion connected to each other, the diameter of the second connecting portion is larger than the diameter of the first connecting portion, and the gel pen further includes: The pen holder comprises a first open end and a second open end, wherein the first open end is detachably connected to the second end of the pen neck; the pen core passes through the first open end and extends to the second open end; The spring is sleeved on the outer circumference of the first connecting part, and when the core is not removed, the two ends of the spring are respectively in contact with the step surface of the connecting structure and the end surface of the second connecting part close to the first connecting part.
9. The gel pen according to any one of claims 1 to 7, characterized in that: The gel pen also includes: The pen cover is sleeved on the outer periphery of the pen neck and is located in the area corresponding to the second through hole.
10. The gel pen according to claim 8, characterized in that: The gel pen also includes: The pen clip is arranged on one side of the pen shaft along a direction perpendicular to the axial direction of the pen shaft, and one end of the pen clip is connected to the second open end of the pen shaft; the pen clip includes a first color part and a second color part, and partial areas of the first color part and the second color part are overlapped.