Pen

Abstract

The utility model relates to the technical field of stationery, in particular to a pen. The pen comprises a writing structure and a penholder. The writing structure comprises an ink guide structure and a pen point connected with the ink guide structure, and the ink guide structure is provided with a puncturing part used for being connected with the ink bag; the pen holder comprises a holder body, a pushing part and a reset piece; wherein the rod body is provided with a containing hole, the writing structure is arranged in the containing hole, and the pen point is exposed out of the first end of the rod body; the pushing part is arranged at the second end of the rod body and can move in the center line direction of the pen holder. The pushing part is provided with a pushing position close to the pen point and a reset position away from the pen point. When the pushing part is located at the pushing position, the pushing part pushes the ink bag, so that the puncturing part punctures the ink bag and is communicated with the ink bag; the reset piece is arranged between the rod body and the pushing part, and the reset piece enables the pushing part to be kept at the reset position under the action of reset force. According to the pen, the ink bag can be installed and replaced more conveniently, and the use experience of a user is improved.

Description

Technical Field

[0001] This application relates to the field of stationery, and more specifically, to a pen. Background Technology

[0002] Pens, as a common office and school accessory, come in many varieties. Taking fountain pens as an example, the traditional writing structure of a fountain pen generally includes an ink cartridge, a refill, and a nib. The nib is attached to the refill, which is connected to the ink cartridge. The refill guides the ink from the cartridge to the nib, allowing for continuous writing. However, due to the limited capacity of the ink cartridge, fountain pens frequently need to be refilled, necessitating the carrying of ink. On one hand, carrying ink takes up space; on the other hand, ink also poses a risk of spillage, easily staining clothing or documents.

[0003] To eliminate the need for carrying ink, a fountain pen with a replaceable ink storage structure has been designed in related technologies. This pen uses an ink cartridge instead of a traditional ink reservoir, and the ink cartridge is interchangeably connected to the ink priming core. Due to the small size of the ink cartridge, it occupies less space. Furthermore, the ink cartridge is sealed until connected to the ink priming core, making ink leakage highly unlikely unless damaged by external force.

[0004] However, replacing the ink cartridge requires considerable external force to engage with the puncture point of the ink core. Users typically need to grip the ink cartridge firmly and press it forcefully against the puncture point. If the force is insufficient to puncture the ink cartridge, it will not write properly, making ink cartridge replacement difficult, especially for children with less strength. Furthermore, if the pressure applied during ink cartridge replacement creates torque between the direction of the pressure and the extension direction of the puncture point, it may damage the puncture point, rendering the pen unusable. Utility Model Content

[0005] A primary objective of this application is to overcome at least one of the deficiencies of the prior art described above and to provide a pen that makes ink cartridge installation and replacement more convenient, thereby improving the user experience.

[0006] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0007] According to one aspect of this application, a pen is provided, the pen comprising:

[0008] A writing structure includes an ink guiding structure and a pen tip connected to the ink guiding structure, the ink guiding structure having a puncture portion for connecting an ink sac.

[0009] The pen barrel includes the push-out part of the barrel and the reset part;

[0010] The rod body has a receiving hole, the writing structure is disposed in the receiving hole, and the pen tip is exposed at the first end of the rod body;

[0011] The pushing part is located at the second end of the rod and can move along the center line of the pen barrel. The pushing part has a pushing position close to the pen tip and a reset position away from the pen tip.

[0012] When the pushing part is in the pushing position, the pushing part pushes the ink sac so that the puncturing part punctures the ink sac and communicates with the ink sac.

[0013] The reset member is disposed between the rod and the pushing part, and the reset member keeps the pushing part in the reset position under the action of the reset force.

[0014] According to one embodiment of this application, the pen barrel further includes a boss structure disposed in the receiving hole;

[0015] The boss structure divides the receiving hole into a first hole segment and a second hole segment. The boss structure has a through hole, and the first hole segment and the second hole segment are connected through the through hole.

[0016] The writing structure is disposed in the first hole segment, and the pushing part is disposed in the second hole segment. When the pushing part is in the pushing position, at least part of the pushing part passes through the through hole and pushes the ink sac, so that the piercing part pierces the ink sac.

[0017] According to one embodiment of this application, the push part includes a push cap and a push rod. The push rod is connected to the end of the push cap near the pen tip. At least a portion of the push cap is exposed outside the second end of the pen barrel. The push rod extends into the through hole. When the push part is in the push position, the push rod pushes the ink sac.

[0018] According to one embodiment of this application, the reset member is sleeved on the push rod, the first end of the reset member acts on the push cap, and the second end of the reset member acts on the boss structure.

[0019] According to one embodiment of this application, the push part further includes a cylindrical body, which is connected to the end of the push cap near the pen tip. The cylindrical body is located circumferentially outside the push rod, and the reset member is disposed between the push rod and the cylindrical body.

[0020] According to one embodiment of this application, a guide structure is provided between the cylinder and the hole wall of the second hole section to allow the pushing part to move along the center line of the pen barrel;

[0021] And / or, an anti-detachment structure is provided between the cylinder and the hole wall of the second hole section. The anti-detachment structure includes a first protrusion provided on the outer wall of the cylinder and a second protrusion provided on the hole wall of the second hole section. When the pushing part is in the reset position, the first protrusion and the second protrusion stop each other.

[0022] According to one embodiment of this application, the end face of the pushing portion exposed at the second end of the rod is an arc-shaped surface.

[0023] According to one embodiment of this application, the ink guiding structure includes an ink core, the ink core having a first end and a second end disposed opposite to each other along the centerline direction of the pen barrel;

[0024] The pen tip is located at the first end of the ink-drawing core, and the puncture portion is located at the second end of the ink-drawing core.

[0025] According to one embodiment of this application, the writing structure further includes an ink sac, the ink sac including a casing and ink disposed within the casing, and the puncture portion is detachably connected to the casing.

[0026] An embodiment of the above application has at least the following advantages or beneficial effects:

[0027] The pen of this application includes a writing mechanism and a pen barrel. The writing mechanism forms a passage for ink flow. The pen barrel includes a shaft and a push-off part. The shaft has a receiving hole, the writing mechanism is disposed in the receiving hole, the pen tip protrudes from the first end of the shaft, and the push-off part is disposed at the second end of the pen barrel and can move along the centerline of the pen barrel. The push-off part has a pushing position near the pen tip and a reset position away from the pen tip. When the push-off part is in the pushing position, it pushes the ink sac, causing the piercing part to pierce the ink sac and communicate with it. When installing the ink sac, the user can first insert the ink sac into the pen barrel, then hold the shaft and forcefully strike the push-off part against a fixed object such as a table. Under the action of external force, the push-off part moves towards the pen tip along the centerline of the shaft, thereby pushing the ink sac, causing the piercing part to pierce the ink sac and communicate with it, thus completing the assembly of the ink sac.

[0028] Compared to directly squeezing the ink cartridge towards the puncture point, the lever has a larger grip diameter, making it easier to apply force. Furthermore, the method of slamming the pusher against a fixed object is easier to apply force, has a higher success rate, and a lower risk of ink leakage during installation compared to pressing the ink cartridge. It also makes it easier for users to replace the ink cartridge, especially for children with less strength. Attached Figure Description

[0029] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts.

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of the pen provided in the application;

[0031] Figure 2 yes Figure 1 The side view of the pen shown;

[0032] Figure 3 yes Figure 2 The pen shown is a cross-sectional view along line AA, wherein, Figure 3 The pen cap was omitted, and Figure 3 The pushing position of the jacking section is shown;

[0033] Figure 4 yes Figure 3 A magnified structural diagram of point B on the pen shown;

[0034] Figure 5 yes Figure 4 A magnified structural diagram of point C on the pen shown;

[0035] Figure 6 yes Figure 2 The pen shown is a cross-sectional view along line AA, in which... Figure 6 The reset position of the pusher is shown;

[0036] Figure 7 yes Figure 6 The diagram shows an enlarged view of the structure at point D of the pen.

[0037] The annotations in the attached figures are explained as follows:

[0038] 10. Pen; 100. Writing structure; 110. Ink guiding structure; 111. Puncture part; 120. Pen tip; 130. Ink sac; 200. Pen barrel; 210. Barrel; 211. Receiving hole; 2111. First hole section; 2112. Second hole section; 212. First rod section; 213. Second rod section; 220. Push part; 221. Push cap; 222. Push rod; 223. Cylinder; 230. Reset part; 240. Boss structure; 241. Through hole; 250. Anti-detachment structure; 251. First protrusion; 252. Second protrusion; 300. Pen cap;

[0039] L, the center line of the pen barrel;

[0040] D1, the direction of the center line of the pen barrel. Detailed Implementation

[0041] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0042] The features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details described, or other methods, components, materials, etc., can be employed. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0043] This application uses a fountain pen as an example to illustrate the specific structure of the embodiments. Of course, the structure of this application can be applied not only to fountain pens, but also to other pens with replaceable ink cartridges, such as carbon pens and erasable pens.

[0044] The following describes an embodiment of the pen of this application with reference to the accompanying drawings.

[0045] Figure 1 This is a three-dimensional structural diagram of an embodiment of the pen provided in the application; Figure 2 yes Figure 1 The side view of the pen shown; Figure 3 yes Figure 2 The pen shown is a cross-sectional view along line AA, wherein, Figure 3 The pen cap was omitted, and Figure 3 The pushing position of the jacking section is shown; Figure 4 yes Figure 3 A magnified structural diagram of point B on the pen shown; Figure 5 yes Figure 4 A magnified structural diagram of point C on the pen shown; Figure 6 yes Figure 2 The pen shown is a cross-sectional view along line AA, in which... Figure 6 The reset position of the pusher is shown; Figure 7 yes Figure 6 The diagram shows an enlarged view of the structure at point D of the pen.

[0046] like Figure 1 and Figure 2 As shown, the pen 10 in this embodiment includes a writing structure 100, a pen barrel 200, and a pen cap 300.

[0047] The writing mechanism 100 is disposed within the pen barrel 200 and forms a pathway for ink flow. The writing mechanism 100 may include an ink guiding structure 110 and a pen tip 120 connected to the ink guiding structure 110. A pen cap 300 may be disposed on the pen barrel 200 to cover the pen tip 120.

[0048] The ink guiding structure 110 has a puncture portion 111 for connecting the ink cartridge 130. Specifically, in some embodiments, such as Figure 3 As shown, the ink guiding structure 110 may include an ink core, which has a first end and a second end disposed opposite to each other along the centerline D1 of the pen barrel. The pen tip 120 is disposed at the first end of the ink core, and a puncture portion 111 is disposed at the second end of the ink core. When the puncture portion 111 is connected to the ink sac 130, the ink in the ink sac 130 can be guided into the ink core along the puncture portion 111, and then guided by the ink core to the pen tip 120, enabling the pen tip 120 to write.

[0049] The pen barrel 200 includes a barrel 210 and a pusher 220. The barrel 210 has a receiving hole 211, the writing structure 100 is disposed in the receiving hole 211, and the pen tip 120 is exposed at the first end of the barrel 210.

[0050] Continue to refer to Figure 3 In some embodiments, the rod 210 may include a first rod segment 212 and a second rod segment 213, which are detachably connected. After the first rod segment 212 and the second rod segment 213 are connected, they form a receiving hole 211 for accommodating the writing structure 100.

[0051] Specifically, the ink core can be fixedly disposed inside the first segment 212, the pen tip 120 is mounted on the ink core and exposed at the first end of the first segment 212, and the piercing part 111 is disposed on the ink core and exposed at the second end of the first segment 212. The outer wall of the first segment 212 has a gripping area for the user to hold when writing. The second segment 213 is detachably connected to the first segment 212, and the second segment 213 can be used to accommodate the ink sac 130. Exemplarily, the second segment 213 can be threadedly connected to the first segment 212.

[0052] The push-up portion 220 is disposed at the second end of the pen barrel 200 and is movable along the centerline L of the pen barrel. Specifically, the push-up portion 220 can be disposed at the end of the second segment 213 away from the pen tip 120. The push-up portion 220 has a push-up position close to the pen tip 120 (e.g., Figure 6 and Figure 7 ) and the reset position away from the pen tip 120 (such as Figure 3 and Figure 4 (As shown). When the pushing part 220 is in the pushing position, the pushing part 220 pushes the ink sac 130 so that the piercing part 111 pierces the ink sac 130 and communicates with the ink sac 130.

[0053] When installing the ink cartridge 130, the user can twist the second rod segment 213 to separate it from the first rod segment 212, then insert the ink cartridge 130 into the second rod segment 213 and twist it to connect it to the first rod segment 212. At this time, the first end of the ink cartridge 130 is opposite to the puncture part 111, and the second end of the ink cartridge 130 abuts against the push part 220. Simultaneously, the ink cartridge 130 pushes the push part 220 to the reset position (e.g., ...). Figure 3 (As shown). At this time, the user can hold the rod 210 and forcefully slam the push part 220 against a fixed object such as a table. Under the action of external force, the push part 220 moves along the center line D1 of the rod 210 toward the pen tip 120 until it moves to the push position (as shown). Figure 6 As shown), this pushes the ink sac 130, causing the puncture part 111 to puncture the ink sac 130 and connect with it, thus completing the assembly of the ink sac 130.

[0054] Compared to squeezing the ink cartridge 130 towards the puncture part 111, the rod 210 has a larger diameter, making it easier to apply force when gripped. Furthermore, the installation method of striking the push part 220 against a fixed object is easier to apply force, has a higher success rate, and a lower risk of ink leakage during installation compared to pressing the ink cartridge 130. This makes it easier for users, especially children with less strength, to replace the ink cartridge 130.

[0055] In addition, before the ink sac 130 is connected to the puncture part 111, it is first assembled into the second rod section 213. The second rod section 213 guides the installation direction of the ink sac 130, so that the installation direction of the ink sac 130 and the extension direction of the puncture part will not generate torque, reducing the probability of damage to the puncture part 111 or other guiding structures.

[0056] It should be noted that, in some embodiments, the writing structure 100 of the pen 10 may include an ink sac 130.

[0057] Of course, in other embodiments, the pen 10 may not include the ink cartridge 130, which can be purchased separately by the user as a replaceable and consumable part.

[0058] Specifically, the ink sac 130 may include a packaging shell and ink disposed inside the packaging shell, and the puncture portion 111 is detachably connected to the packaging shell to enable replacement of the ink sac 130.

[0059] like Figure 3 and Figure 4 As shown, in some embodiments, the pen barrel 200 further includes a reset member 230, which is disposed between the barrel 210 and the push portion 220. Under the action of the reset force, the reset member 230 keeps the push portion 220 in the reset position so as to facilitate the next replacement of the ink cartridge 130.

[0060] Furthermore, such as Figure 4 As shown, in some embodiments, the pen barrel 200 also includes a boss structure 240 disposed in the receiving hole 211.

[0061] The boss structure 240 can divide the receiving hole 211 into a first hole segment 2111 and a second hole segment 2112. The boss structure 240 has a through hole, and the first hole segment 2111 and the second hole segment 2112 are connected through the through hole 241.

[0062] Specifically, such as Figure 3 As shown, the writing structure 100 can be set in the first hole section 2111, and the push part 220 can be set in the second hole section 2112, so that the structural layout inside the pen barrel 200 is more optimized and reasonable.

[0063] like Figure 4 As shown, when the pushing part 220 is in the pushing position, at least a portion of the pushing part 220 passes through the through hole 241 to push the ink sac 130, so that the piercing part 111 pierces the ink sac 130. The through hole 241 can guide the movement of the pushing part 220, so that the pushing part 220 can move along the center line direction D1 of the pen barrel.

[0064] For example, the boss structure 240 can be an annular structure, with the outer periphery of the annular structure connected to the inner wall of the receiving hole 211, and the inner hole of the annular structure forming a through hole 241. The boss structure 240 includes a first surface near the pen tip 120 and a second surface away from the pen tip, with one end of the reset member abutting against the second surface and the other end abutting against the push portion 220.

[0065] like Figure 7 As shown, in some embodiments, the push-up portion 220 includes a push-up cap 221 and a push rod 222. The push rod 222 is connected to the end of the push-up cap 221 near the pen tip 120. At least a portion of the push-up cap 221 protrudes from the second end of the pen barrel 200 for impact or compression with an external fixing structure. The push rod 222 can extend into the through hole 241. When the push-up portion 220 is in the push-up position, the push rod 222 pushes the ink sac 130 so that the ink sac 130 connects with the puncture portion 111.

[0066] It should be noted that, continuing to refer to Figure 7 In some embodiments, the end face of the pusher portion 220 exposed at the second end can be an arc-shaped surface, that is, the end face of the pusher cap 221 exposed at the second end of the rod 210 is an arc-shaped surface. Compared with a plane that is set at an angle, an arc-shaped surface can evenly distribute stress and avoid excessive local stress, thereby reducing the probability of deformation of the pusher cap 221.

[0067] Continue to refer to Figure 7In some embodiments, the reset member 230 is sleeved on the push rod 222, the first end of the reset member 230 acts on the push cap 221, and the second end of the reset member 230 acts on the boss structure 240.

[0068] When the pusher 220 is pushed by an external force, the reset member 230 will be compressed and deformed, storing elastic potential energy (such as...). Figure 7 (As shown). When the external force is removed, the reset member 230 pushes the push cap 221 with the reset force, so that the push part 220 returns to the reset position (as shown). Figure 4 (As shown).

[0069] Specifically, the reset member 230 can be an elastic reset member. For example, the reset member 230 can be a spring or an elastic silicone member.

[0070] like Figure 7 As shown, in some embodiments, the push part 220 further includes a cylinder 223 connected to one end of the push cap 221 near the pen tip 120. The cylinder 223 is located on the circumferential outer side of the push rod. The reset member 230 is disposed between the push rod 222 and the cylinder 223, so that the reset member 230 can provide a reset force along the center line direction D1 of the pen barrel.

[0071] It should be noted that when the jacking part 220 moves to the jacking position, the cylinder 223 can abut against the boss structure 240 so that the user knows that the jacking part 220 has been jacked into place.

[0072] Furthermore, in some embodiments, a guide structure (not shown in the figure) is provided between the wall of the cylinder 223 and the second hole section 2112 to allow the pusher 220 to move along the center line of the pen barrel 200.

[0073] The guide structure constrains the pusher 220, ensuring it can only move along the centerline D1 of the pen barrel. Since the pusher 220 needs to accurately push the ink cartridge 130, any deviation in its direction of movement may prevent it from accurately positioning itself within the ink cartridge 130. This could cause the puncture point 111 to fail to effectively puncture the ink cartridge 130, affecting the normal ink supply and interfering with the writing process. Therefore, the guide structure improves the stability of the ink cartridge 130 installation and reduces the risk of ink leakage during installation.

[0074] For example, the guide structure may include a guide rib and a guide groove. The guide rib may be arranged along the centerline direction D1 of the pen barrel, and the guide groove may be arranged in conjunction with the guide rib. One of the guide rib and the guide groove may be arranged on the wall of the second hole section 2112, and the other may be arranged on the outer wall of the cylinder 223.

[0075] Furthermore, such as Figure 4An anti-detachment structure 250 is provided between the cylinder 223 and the hole wall of the second hole section 2112. Figure 5 (As shown), the anti-detachment structure 250 includes a first protrusion 251 disposed on the outer wall of the cylinder 223 and a second protrusion 252 disposed on the wall of the second hole section 2112. When the pusher 220 is in the reset position, the first protrusion 251 and the second protrusion 252 stop and cooperate.

[0076] Due to the reset member 230, when the push part 220 tends to disengage from the rod 210, the anti-disengagement structure 250 can prevent the push part 220 from disengaging from the rod 210, thus keeping the push part 220 stably in the reset position.

[0077] Specifically, when the pusher 220 tends to detach from the rod 210, the second protrusion 252 located on the wall of the second hole section 2112 can form a stop against the first protrusion 251 located on the outer wall of the cylinder 223 to prevent the pusher 220 from detaching from the rod 210.

[0078] This application improves the installation method of the ink cartridge 130. By modifying the structure of the pen barrel 200, the barrel 200 includes a body 210 and a push-up part 220 located at the tail end of the body 210. The mobility of the push-up part 220 enables the assembly of the ink cartridge 130, making the assembly process easier and more stable. Compared to directly holding the ink cartridge 130 and connecting it to the puncture part 111, the pen 10 of this application is more suitable for children, effectively improving the efficiency of ink cartridge replacement and reducing the risk of ink leakage during replacement.

[0079] Finally, it should be noted that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described in detail here.

[0080] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0081] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0082] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A pen, characterized in that, include: A writing structure includes an ink guiding structure and a pen tip connected to the ink guiding structure, the ink guiding structure having a puncture portion for connecting an ink sac. The pen barrel includes the barrel body, the push-out part, and the reset part; The rod body has a receiving hole, the writing structure is disposed in the receiving hole, and the pen tip is exposed at the first end of the rod body; The pushing part is located at the second end of the rod and can move along the center line of the pen barrel. The pushing part has a pushing position close to the pen tip and a reset position away from the pen tip. When the pushing part is in the pushing position, the pushing part pushes the ink sac so that the puncturing part punctures the ink sac and communicates with the ink sac; The reset member is disposed between the rod and the pushing part, and the reset member keeps the pushing part in the reset position under the action of the reset force.

2. The pen according to claim 1, characterized in that, The pen barrel also includes a boss structure disposed in the receiving hole; The boss structure divides the receiving hole into a first hole segment and a second hole segment. The boss structure has a through hole, and the first hole segment and the second hole segment are connected through the through hole. The writing structure is disposed in the first hole segment, and the pushing part is disposed in the second hole segment. When the pushing part is in the pushing position, at least part of the pushing part passes through the through hole and pushes the ink sac, so that the puncturing part punctures the ink sac.

3. The pen according to claim 2, characterized in that, The push-up part includes a push-up cap and a push rod. The push rod is connected to the end of the push-up cap near the pen tip. At least part of the push-up cap is exposed outside the second end of the pen barrel. The push rod extends into the through hole. When the push-up part is in the push-up position, the push rod pushes the ink sac.

4. The pen according to claim 3, characterized in that, The reset component is sleeved on the push rod, the first end of the reset component acts on the push cap, and the second end of the reset component acts on the boss structure.

5. The pen according to claim 3, characterized in that, The push part also includes a cylindrical body, which is connected to the end of the push cap near the pen tip. The cylindrical body is located on the circumferential outer side of the push rod, and the reset member is disposed between the push rod and the cylindrical body.

6. The pen according to claim 5, characterized in that, A guide structure is provided between the cylinder and the hole wall of the second hole section to allow the pushing part to move along the center line of the pen barrel.

7. The pen according to claim 5, characterized in that, An anti-detachment structure is provided between the cylinder and the hole wall of the second hole section. The anti-detachment structure includes a first protrusion on the outer wall of the cylinder and a second protrusion on the hole wall of the second hole section. When the pushing part is in the reset position, the first protrusion and the second protrusion stop each other.

8. The pen according to any one of claims 1-7, characterized in that, The end face of the pusher portion exposed at the second end of the rod is an arc-shaped surface.

9. The pen according to any one of claims 1-7, characterized in that, The ink guiding structure includes an ink core, which has a first end and a second end that are disposed opposite to each other along the centerline of the pen barrel. The pen tip is located at the first end of the ink-drawing core, and the puncture portion is located at the second end of the ink-drawing core.

10. The pen according to any one of claims 1-7, characterized in that, The writing structure also includes an ink sac, which includes a casing and ink disposed within the casing, and the puncture portion is detachably connected to the casing.

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