Pen with flat surface
By designing the first and second tube cavity on the pen shaft and using threads or snap connections of the step tube walls, the problem of hand sluggishness caused by uneven connections in the existing pen design is solved, and the simplicity and aesthetics of the pen are improved.
Patent Information
- Application Number
- CN202421717480.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-19
AI Technical Summary
In the existing pen design, there is an uneven problem at the connection between the pen cap and the pen holder, which leads to a bad hand when holding it, and the user experience is poor. At the same time, the plug-in and unplugging cap design lacks stability and firmness.
A pen with a flat surface is designed to form a first lumen at the first end of the pen shaft and extend longitudinally at one end of the pen cap to form a step tube wall, and the outer diameter of the step tube wall is smaller than the outer diameter of the pen cap. The pen cap is inserted in the first and second tube cavity in a thread or snap-on manner in storage and use states, ensuring that the thickness of the pen cap and the pen holder are consistent, and the connection is continuously flat.
It realizes the fountain pen’s appearance, flat surface and beautiful appearance, avoids the space of the appearance design, and improves the aesthetics and simplicity of the pen, improving the user’s hand grip comfort and user experience.
Smart Images
Figure CN222891825U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of writing tools, in particular to a fountain pen with a smooth surface. Background Art
[0002] A fountain pen is a writing instrument that uses a hollow ink sac / inker to hold ink, and uses gravity and capillary action to write through the nib. The writing can be light or heavy, and can vary in thickness.
[0003] In the prior art, a fountain pen includes a pen barrel, a pen grip, a nib and a pen cap. In order to ensure the firmness of the pen cap, an external thread is provided at one end of the existing pen barrel near the nib, and an internal thread is provided on the inner surface of the pen cap, so that the pen cap can be mounted on the pen barrel by a threaded connection. However, when the external thread is provided on the outer surface of the pen barrel, it is usually necessary to provide a high and low step diameter change on the pen barrel to ensure that the thickness of the pen cap and the pen barrel are consistent when the pen cap is rotated and sleeved on the pen barrel, and the existence of the thread and the step will cause the user's hand to hurt when holding the pen barrel to write, which is not comfortable when holding the pen barrel to write, and the user's experience is poor. If the high and low step diameter change is not provided on the pen barrel, and the external thread is directly provided at one end of the pen barrel near the nib, it will cause the outer diameter of the pen cap to be larger than the outer diameter of the pen barrel when the pen cap is rotated and sleeved on the pen barrel, resulting in the thickness of the pen cap and the pen barrel being inconsistent, not simple and flat, and unable to meet the design requirements, and it is impossible to design some continuous splicing patterns on the surface of the pen barrel and the pen cap, so that the appearance design space of the fountain pen is severely limited. The design of a non-threaded plug-in cap fountain pen also has the problem of not being able to achieve both the above-mentioned flat surface and the elimination of the height step change, and the plug-in cap lacks firmness and stability.
[0004] The existing fountain pen design also does not eliminate the problem of unevenness when the pen cap is installed on the end of the pen. Most solutions are to create a height difference when the pen cap is installed on the end of the pen by friction. If the pen cap is provided with an internal thread and the end of the pen body is provided with an external thread, although the pen cap is rotated and installed on the end of the pen, the pen body still has a height difference near the nib. Utility Model Content
[0005] The utility model aims to provide a fountain pen with a flat surface, aiming to at least solve one of the technical problems existing in the prior art.
[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model provides a pen with a flat surface, which is characterized by comprising:
[0007] A pen holder, wherein a first end of the pen holder is longitudinally extended to form a first lumen, and a second end of the pen holder is longitudinally extended to form a second lumen;
[0008] a pen tip connected to the first end of the pen barrel; and
[0009] A pen cap, one end of which protrudes and extends in the longitudinal direction to form a stepped tube wall, the outer diameter of which is smaller than the outer diameter of the pen cap, and the pen cap has a storage state and a use state relative to the pen holder;
[0010] Among them, when the pen cap is in a storage state, the step tube wall of the pen cap is inserted into the first tube cavity in a threaded or snap-fit manner, and when the pen cap is in a use state, the step tube wall of the pen cap is inserted into the second tube cavity in a threaded or snap-fit manner.
[0011] Further, the inner surface of the first tube cavity is provided with an internal thread, the inner surface of the second tube cavity is provided with an internal thread, and the outer surface of the step tube wall is provided with an external thread;
[0012] Wherein, when the pen cap is in a storage state, the step tube wall of the pen cap is threadedly connected to the first tube cavity, and when the pen cap is in a use state, the step tube wall of the pen cap is threadedly connected to the second tube cavity.
[0013] Furthermore, the outer diameter of the first lumen is equal to the outer diameter of the pen shaft, the outer diameter of the second lumen is equal to the outer diameter of the pen shaft, and the outer diameter of the pen cap is equal to the outer diameter of the first lumen.
[0014] Furthermore, it also includes a cover body, which can be movably covered in the second tube cavity along the longitudinal direction.
[0015] Furthermore, an elastic member is included, and the elastic member is arranged between the cover body and the bottom wall of the second tube cavity, so that the elastic member applies a force to the cover body along the extending direction.
[0016] Furthermore, a first rod portion is provided on one side of the cover body facing the bottom wall of the second tube cavity, a through hole is provided in the bottom wall of the second tube cavity along the longitudinal direction, the first rod portion is inserted into the through hole, the elastic member is sleeved on the first rod portion, and a stopper portion is provided at one end of the first rod portion away from the cover body, so that the stopper portion abuts against the bottom wall of the second tube cavity to limit the first rod portion from being separated from the through hole.
[0017] Furthermore, a connecting hole is axially opened at one end of the first rod portion away from the cover body, and a second rod portion is provided on the side of the resisting portion facing the first rod portion, so that the resisting portion is inserted into the connecting hole through the second rod portion to be threadedly connected or tightly fitted with the first rod portion.
[0018] Furthermore, a straight or cross-shaped slot is provided on a side of the blocking portion away from the first rod portion.
[0019] Furthermore, the pen shaft comprises a first pen shaft component and a second pen shaft component of equal outer diameter, the second end of the first pen shaft component is threadedly connected to the first end of the second pen shaft component, the pen tip is arranged at the first end of the first pen shaft component, and the second lumen is arranged at the second end of the second pen shaft component.
[0020] Furthermore, the distance between the inner surface of the first tube cavity and the pen tip is greater than the wall thickness of the step tube wall.
[0021] It can be seen from the above technical scheme that the fountain pen of the utility model forms a first tubular cavity by extending longitudinally at the first end of the pen body, and then arranges the connecting structure in the first tubular cavity to ensure that the outer surface of the pen body is smooth and does not hurt the hand, and a stepped tube wall is formed by protruding and extending longitudinally at one end of the pen cap, so that when the stepped tube wall of the pen cap is inserted into the first tubular cavity in a threaded manner or a snap-fit manner, the thickness of the pen cap and the pen body are consistent, so as to achieve a simple appearance, a flat surface, and a beautiful appearance of the fountain pen, and avoid the limitation of the appearance design space of the fountain pen, and a second tubular cavity is formed by extending longitudinally at the second end of the pen body. When in the writing use state, the stepped tube wall of the pen cap is inserted into the second tubular cavity in a threaded manner or a snap-fit manner, and the thickness of the pen cap and the pen body can still be ensured to be consistent, and the connection between the pen cap and the pen body has a continuous and smooth transition without steps, which effectively improves the beauty and simplicity of the fountain pen to meet the design requirements.
[0022] In order to make the technical concept and other purposes, advantages, features and functions of the present invention more clearly understood, preferred embodiments will be specifically cited in the following specific implementation manner and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 is a three-dimensional diagram of a fountain pen with a flat surface in a storage state provided by an embodiment of the present application;
[0025] Figure 2 This is a front view of a fountain pen with a flat surface provided in an embodiment of the present application in a storage state;
[0026] Figure 3 The embodiment of this application provides Figure 2 Sectional view of the middle section AA;
[0027] Figure 4This is a structural exploded view of a fountain pen with a flat surface provided in an embodiment of the present application;
[0028] Figure 5 is a three-dimensional diagram of a pen with a flat surface provided in an embodiment of the present application when in use;
[0029] Figure 6 This is a front view of a fountain pen with a flat surface provided in an embodiment of the present application when in use;
[0030] Figure 7 The embodiment of this application provides Figure 6 Cross-sectional view of the middle section BB.
[0031] The above drawings include the following reference numerals:
[0032] 100, pen holder; 110, first pen holder member; 111, first lumen; 120, second pen holder member; 121, second lumen; 122, bottom wall;
[0033] 200, pen tip; 300, pen cap; 310, stepped tube wall;
[0034] 400, cover body; 410, first rod portion; 411, connecting hole; 420, blocking portion; 421, second rod portion; 422, slot; 430, elastic member. DETAILED DESCRIPTION
[0035] In order to enable those skilled in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.
[0036] Please also read Figures 1 to 7 The present embodiment provides a pen with a flat surface, comprising a pen body 100, a pen tip 200 and a pen cap 300. The first end of the pen body 100 is extended along the longitudinal direction to form a first tube cavity 111, and the inner surface of the first tube cavity 111 is provided with an internal thread, and the second end of the pen body 100 is extended along the longitudinal direction to form a second tube cavity 121, and the inner surface of the second tube cavity 121 is provided with an internal thread, the pen tip 200 is connected to the first end of the pen body 100, and one end of the pen cap 300 protrudes and extends along the longitudinal direction to form a step tube wall 310, and the outer surface of the step tube wall 310 is provided with an external thread, and the pen cap 300 has a storage state and a use state relative to the pen body 100, wherein when the pen cap 300 is in the storage state, as shown in FIG. Figure 1As shown, the step tube wall 310 of the pen cap 300 is threadedly connected to the first tube cavity 111, so that the pen tip 200 is shielded and covered by the pen cap 300 for storage, so as to protect and seal the pen tip 200. When the pen cap 300 is in use, as shown in FIG. Figure 5 As shown, the stepped tube wall 310 of the pen cap 300 is threadedly connected to the second tube cavity 121. In this way, the pen cap 300 is removed and threadedly connected to the end of the pen body 100 away from the pen tip 200. In this way, the user can hold the pen body 100 with his hand and use it for writing through the pen tip 200.
[0037] It can be seen that the fountain pen of this embodiment is provided with an internal thread on the inner surface of the first tube cavity 111 of the pen body 100 to ensure that the outer surface of the pen body 100 is smooth and not uncomfortable to the hand, and a stepped tube wall 310 is formed at one end of the pen cap 300 by protruding and extending in the longitudinal direction, and the outer surface of the stepped tube wall 310 is provided with an external thread, so that when the pen cap 300 is threadedly connected to the first tube cavity 111, the thickness of the pen cap 300 and the pen body 100 are consistent, so as to achieve a simple appearance, a flat surface, and a beautiful appearance of the fountain pen, and avoid the limitation of the appearance design space of the fountain pen, and an internal thread is provided on the inner surface of the second tube cavity 121 of the pen body 100. When the pen cap 300 is in the writing use state, the stepped tube wall 310 of the pen cap 300 is threadedly connected to the second tube cavity 121, which can still ensure that the thickness of the pen cap 300 and the pen body 100 are consistent, and the connection between the pen cap 300 and the pen body 100 has a continuous and neat transition without steps, which effectively improves the beauty and simplicity of the fountain pen to meet the design requirements.
[0038] In addition, in other embodiments, when the pen cap 300 is in the storage state, the step tube wall 310 of the pen cap 300 is inserted into the first tube cavity 111 in a snap-fit manner; when the pen cap 300 is in the use state, the step tube wall 310 of the pen cap 300 is inserted into the second tube cavity 121 in a snap-fit manner. By setting the snap connection structure in the first tube cavity 111 or the second tube cavity 121, it is also possible to ensure that the outer surface of the pen body 100 is smooth and not uncomfortable to the hand, and the thickness of the pen cap 300 and the pen body 100 are consistent.
[0039] In this embodiment, if Figure 1 and Figure 2 As shown, the outer diameter of the first lumen 111 is equal to the outer diameter of the pen body 100, the outer diameter of the step tube wall 310 is smaller than the outer diameter of the pen cap 300, and the outer diameter of the pen cap 300 is equal to the outer diameter of the first lumen 111, so that when in the storage state, the pen cap 300 can be ensured to be consistent in thickness with the pen body 100, and the connection between the two can be uniformly and continuously transitioned without steps; Figure 5 and Figure 6As shown, the outer diameter of the second lumen 121 is equal to the outer diameter of the pen body 100, so that the pen cap 300 and the pen body 100 can be of the same thickness when in use, and the connection between the two has a uniform and continuous transition without steps, which effectively improves the aesthetics and simplicity of the pen.
[0040] Among them, Figure 3 and Figure 5 As shown, the distance between the inner surface of the first tube cavity 111 and the pen tip 200 is greater than the wall thickness of the step tube wall 310. In this way, when the step tube wall 310 of the pen cap 300 is threadedly connected in the first tube cavity 111 in the storage state, it is ensured that no wear will occur between the step tube wall 310 and the pen tip 200, avoiding damage to the pen tip 200 due to surface structure interference, and the structure is stable and reliable.
[0041] Preferably, the pen body 100 , the first tubular cavity 111 , the second tubular cavity 121 and the pen cap 300 are all cylindrical in shape.
[0042] Specifically, if Figure 1 and Figure 4 As shown, the fountain pen further includes a cover body 400, which is movably covered in the second tubular cavity 121 along the longitudinal direction. In this way, when in the storage state, the pen cap 300 is sleeved on the end of the pen body 100 facing the nib 200, and the end of the pen body 100 away from the nib 200 blocks the internal space of the second tubular cavity 121 through the cover body 400, so as to avoid the internal space of the second tubular cavity 121 being exposed and affecting the appearance when the pen cap 300 is not connected to the second tubular cavity 121.
[0043] Furthermore, the fountain pen further comprises an elastic member 430, which is disposed between the cover 400 and the bottom wall 122 of the second tube cavity 121, so that the elastic member 430 applies a force to the cover 400 in the extension direction, and the bottom wall 122 is located between the second tube cavity 121 and the pen body 100. Figure 3 and Figure 7 As shown, in this way, when the stepped tube wall 310 of the pen cap 300 is threadedly connected in the second tube cavity 121, the cover body 400 is pushed inward to move and squeeze the elastic member 430, so that the internal space of the second tube cavity 121 can be vacated to ensure that the stepped tube wall 310 of the pen cap 300 can be threadedly connected in the second tube cavity 121, and when the pen cap 300 is unscrewed from the second tube cavity 121, the elastic force of the elastic member 430 pushes the cover body 400 to slide outward for reset, wherein the elastic member 430 is preferably a telescopic spring.
[0044] In this embodiment, if Figure 3 and Figure 7As shown, a first rod portion 410 is provided on one side of the cover body 400 facing the bottom wall 122 of the second tubular cavity 121, a through hole is opened in the longitudinal direction of the bottom wall 122 of the second tubular cavity 121, the first rod portion 410 is inserted into the through hole, the elastic member 430 is sleeved on the first rod portion 410, and a stopper 420 is provided at one end of the first rod portion 410 away from the cover body 400, so as to limit the first rod portion 410 from being separated from the through hole by the stopper 420 and the bottom wall 122 of the second tubular cavity 121, so as to ensure the stability and reliability of the structure, wherein the shape of the cover body 400 is preferably a circular cover plate, and the stopper 420 is preferably a circular flange.
[0045] Specifically, a connecting hole 411 is axially opened at one end of the first rod portion 410 away from the cover body 400, and a second rod portion 421 is provided on the side of the resisting portion 420 facing the first rod portion 410, so that the resisting portion 420 is inserted into the connecting hole 411 through the second rod portion 421 to be threadedly connected or tightly fitted with the first rod portion 410, wherein the tight fit can be achieved by interference fit or by bonding with an adhesive to perform axial positioning of the second rod portion 421 to prevent the second rod portion 421 from easily detaching from the first rod portion 410.
[0046] Furthermore, a straight or cross-shaped slot 422 is provided on the side of the resisting portion 420 away from the first rod portion 410, wherein the pen body 100 is a hollow tubular structure, and a wrench tool is inserted into the pen body 100 and into the slot 422 to operate the resisting portion 420 and the cover body 400 for assembly, so as to facilitate assembly.
[0047] In this embodiment, if Figure 3 and Figure 4 As shown, the pen body 100 includes a first pen body component 110 and a second pen body component 120 with equal outer diameters. The first pen body component 110 and the second pen body component 120 are both cylindrical in shape. The second end of the first pen body component 110 is threadedly connected to the first end of the second pen body component 120, and the nib 200 is arranged at the first end of the first pen body component 110, and the second tube cavity 121 is arranged at the second end of the second pen body component 120. In this way, the pen body 100 is designed as a split combination of the first pen body component 110 and the second pen body component 120, which is convenient for assembly and holding ink.
[0048] Among them, the second end of the first pen component 110 is provided with a step rod, the outer diameter of the step rod is smaller than the outer diameter of the first pen component 110, the outer surface of the step rod is provided with an external thread, and the inner surface of the first end of the second pen component 120 is provided with an internal thread, and the step rod of the first pen component 110 is threadedly connected with the first end of the second pen component 120.
[0049] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:
[0050] The fountain pen of the present invention is provided with an internal thread on the inner surface of the first tube cavity 111 of the pen body 100 to ensure that the outer surface of the pen body 100 is smooth and not uncomfortable to the hand, and a stepped tube wall 310 is formed on one end of the pen cap 300 by protruding and extending in the longitudinal direction, and the outer surface of the stepped tube wall 310 is provided with an external thread, so that when the pen cap 300 is threadedly connected to the first tube cavity 111, the thickness of the pen cap 300 and the pen body 100 are consistent, so as to achieve a simple appearance, a flat surface, and a beautiful appearance of the fountain pen, and avoid the limitation of the appearance design space of the fountain pen, and the inner surface of the second tube cavity 121 of the pen body 100 is provided with an internal thread, and when the pen cap 300 is threadedly connected to the second tube cavity 121 in the writing use state, the stepped tube wall 310 of the pen cap 300 is still able to ensure that the thickness of the pen cap 300 and the pen body 100 are consistent, and the connection between the pen cap 300 and the pen body 100 has a continuous and neat transition without a step, which effectively improves the beauty and simplicity of the fountain pen to meet the design requirements.
[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0052] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0053] It should also be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.
[0054] In this specification, the terms "longitudinal", "lateral", "top", "bottom", "inner", "outer", "central", "axial", "radial", "circumferential", etc. are only intended to facilitate the description of the present application and simplify the description based on the directions or positional relationships shown in the drawings, rather than indicating or implying that the devices or elements involved must have a specific orientation. They are constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.
[0055] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.
[0056] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.
Claims
1. A fountain pen with a flat surface, characterized in that: include: A pen shaft (100), wherein a first end of the pen shaft (100) is extended longitudinally to form a first lumen (111), and a second end of the pen shaft (100) is extended longitudinally to form a second lumen (121); A pen tip (200), the pen tip (200) being connected to the first end of the pen holder (100); as well as A pen cap (300), one end of the pen cap (300) protrudes and extends in the longitudinal direction to form a stepped tube wall (310), the outer diameter of the stepped tube wall (310) is smaller than the outer diameter of the pen cap (300), and the pen cap (300) has a storage state and a use state relative to the pen body (100); Wherein, when the pen cap (300) is in a storage state, the step tube wall (310) of the pen cap (300) is inserted into the first tube cavity (111) in a threaded manner or a snap-fit manner; when the pen cap (300) is in a use state, the step tube wall (310) of the pen cap (300) is inserted into the second tube cavity (121) in a threaded manner or a snap-fit manner.
2. The surface-smoothed fountain pen according to claim 1, characterized in that: The inner surface of the first tube cavity (111) is provided with an internal thread, the inner surface of the second tube cavity (121) is provided with an internal thread, and the outer surface of the step tube wall (310) is provided with an external thread; Wherein, when the pen cap (300) is in a storage state, the step tube wall (310) of the pen cap (300) is threadedly connected to the first tube cavity (111); when the pen cap (300) is in a use state, the step tube wall (310) of the pen cap (300) is threadedly connected to the second tube cavity (121).
3. The surface-smoothed fountain pen according to claim 1, characterized in that: The outer diameter of the first lumen (111) is equal to the outer diameter of the pen shaft (100), the outer diameter of the second lumen (121) is equal to the outer diameter of the pen shaft (100), and the outer diameter of the pen cap (300) is equal to the outer diameter of the first lumen (111).
4. The surface-smoothed fountain pen according to claim 1, characterized in that: It also includes a cover body (400), and the cover body (400) can be movably covered in the second tube cavity (121) along the longitudinal direction.
5. The surface-smoothed fountain pen according to claim 4, characterized in that: It also includes an elastic member (430), which is arranged between the cover body (400) and the bottom wall (122) of the second tube cavity (121) so as to apply a force to the cover body (400) along the extension direction through the elastic member (430).
6. The surface-smoothed fountain pen according to claim 5, characterized in that: A first rod portion (410) is provided on one side of the cover body (400) facing the bottom wall (122) of the second tube cavity (121); a through hole is provided in the bottom wall (122) of the second tube cavity (121) along the longitudinal direction; the first rod portion (410) is inserted into the through hole; the elastic member (430) is sleeved on the first rod portion (410); and a stopper (420) is provided at one end of the first rod portion (410) away from the cover body (400) so as to limit the first rod portion (410) from being separated from the through hole by abutting against the bottom wall (122) of the second tube cavity (121) through the stopper (420).
7. The surface-smoothing fountain pen according to claim 6, characterized in that: A connecting hole (411) is axially provided at one end of the first rod portion (410) away from the cover body (400), and a second rod portion (421) is provided on the side of the resisting portion (420) facing the first rod portion (410), so that the resisting portion (420) is inserted into the connecting hole (411) through the second rod portion (421) to be threadedly connected or tightly fitted with the first rod portion (410).
8. The surface-smoothing fountain pen according to claim 7, characterized in that: A straight-line or cross-shaped slot (422) is provided on a side of the blocking portion (420) away from the first rod portion (410).
9. The surface-smoothed fountain pen according to any one of claims 1 to 8, characterized in that: The pen shaft (100) comprises a first pen shaft component (110) and a second pen shaft component (120) having the same outer diameter, the second end of the first pen shaft component (110) is threadedly connected to the first end of the second pen shaft component (120), the pen tip (200) is arranged at the first end of the first pen shaft component (110), and the second tube cavity (121) is arranged at the second end of the second pen shaft component (120).
10. The surface-smoothed fountain pen according to any one of claims 1 to 8, characterized in that: The distance between the inner surface of the first tube cavity (111) and the pen tip (200) is greater than the wall thickness of the step tube wall (310).