Marking pen structure
By designing a marker pen structure that connects the handle to the pen tube via a thread, the problems of poor tip protection, ink evaporation, and inconvenient operation are solved. This achieves automatic tip protection and easy operation, extends the lifespan of the marker pen, and ensures writing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU ZHIYUAN PLASTIC PRODUCTS CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-19
AI Technical Summary
Existing markers have poor tip protection, low safety, volatile ink, and are inconvenient to use.
A marker pen structure including a pen tube, an ink sac tube, a screw handle, and a retaining cap was designed. The extension and retraction of the pen tip is achieved by the screw handle being threadedly connected to the pen tube. Combined with the design of the retaining cap and retaining step, it is ensured that the pen tip retracts to the grip when not in use, reducing the contact between ink and air. The extension and retraction of the pen tip can be achieved through a simple rotation operation.
It effectively protects the pen tip, extends its lifespan, reduces ink evaporation, improves writing smoothness, is simple and convenient to operate, has a stable structure, and a firm connection.
Smart Images
Figure CN224256331U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of writing instrument technology, specifically relating to a marker pen structure. Background Technology
[0002] Marker pens, as a common writing tool, are widely used in various fields such as office work, study, drawing, and marking. Currently, most marker pens on the market are relatively simple, generally consisting of a barrel, an ink cartridge, and a nib. The ink cartridge is located inside the barrel, and the nib is located at the front of the cartridge. Writing is done by pressing the nib or by using the nib directly. However, existing marker pens have several shortcomings: 1. When not in use, the nib is exposed, making it susceptible to environmental contamination, such as dust and debris, which can affect writing quality and even cause clogging, shortening the marker's lifespan; 2. Due to prolonged exposure, the nib is easily damaged by impacts during carrying or storage; 3. The exposed nib allows ink in the cartridge to easily come into contact with air, causing ink evaporation and affecting the marker's writing smoothness and lifespan; 4. Marker pens with retractable nibs have a more complex operation, requiring the user to apply considerable force or perform specific actions, making them less convenient to use. Utility Model Content
[0003] The technical problem to be solved by this utility model is that existing marker pens have problems such as poor tip protection, low safety, ink evaporation, and inconvenient operation. This utility model aims to improve the performance and user experience of marker pens and provides a marker pen structure to address these issues.
[0004] This invention is implemented as follows: a marker pen structure is provided, including a pen tube, an ink sac tube, a handle, and a retaining cap. The ink sac tube has a pen tip at its front end and is placed inside the pen tube. The front end of the pen tube is the grip end, and the writing end of the pen tip is located inside the grip end. The rear end of the pen tube has a first internal thread and a first external thread radially on its outer side. The front end of the handle has a second external thread radially outward. The handle is screwed into the first internal thread at the rear end of the pen tube via the second external thread to form a connection. The tail end of the ink sac tube is connected to the front end of the handle, thereby allowing the writing end of the pen tip to extend or retract into the grip end by screwing the handle into or out of the pen tube. The retaining cap has a second internal thread and an axial through hole at its end. The rear end of the handle passes outward through the through hole. The retaining cap is screwed into the first external thread at the rear end of the pen tube via the second internal thread to prevent the handle from unscrewing and detaching from the pen tube.
[0005] Furthermore, the diameter of the tail end of the handle is smaller than the diameter of the second external thread at its front end, forming a limiting step, and the handle is limited and connected to the through hole through the limiting step.
[0006] Furthermore, a pen clip is provided on the outer side of the limiting cap and attached to the outside of the pen tube, with the rear end of the pen clip connected to the limiting cap.
[0007] Furthermore, the front end of the handle is provided with an axial mounting hole, and the tail end of the ink sac tube is clamped in the mounting hole.
[0008] Furthermore, the tail end of the ink sac tube is sealed with a silicone plug, the diameter of the tail end of the silicone plug being greater than or equal to the diameter of the ink sac tube, and its front end being interference-fitted into the tail end of the ink sac tube.
[0009] Furthermore, the ink sac tube is filled with ink, and the pen tip includes an ink guide and an installation guide for mounting the ink guide. The front end of the installation guide has an axial insertion hole, and its tail end is connected to the front end of the ink sac tube. The grip end of the pen tube is hollow and conical, and its tip has a pen tip inlet / outlet hole. The front end of the ink guide serves as the writing end and is correspondingly set with the pen tip inlet / outlet hole, and its tail end passes through the insertion hole.
[0010] Furthermore, a return spring is fitted onto the mounting guide tube between the front end of the ink sac tube and the pen grip end.
[0011] Furthermore, the pen tube is a metal pen tube, the handle is a metal handle, and the limiting cap is a metal limiting cap.
[0012] Furthermore, the end of the handle located outside the through hole has radial anti-slip texture.
[0013] Compared with the prior art, the marker pen structure of this utility model, through the cooperation of the handle and the rear end of the pen tube, and the connection between the front end of the handle and the ink sac tube inside the pen tube, the handle can be screwed in or out of the rear end of the pen tube, realizing the extension function of the pen tip. When not in use, the pen tip can be retracted to the grip end, effectively avoiding the pen tip from being contaminated and bumped by the external environment, and extending the service life of the marker pen.
[0014] With the pen tip retracted to the grip, the contact area between ink and air is reduced, slowing down ink evaporation, saving ink, and ensuring smooth writing. Operation is simple and convenient; simply twist the handle at the end outside the limit cap with your fingers, and rotate it counter-clockwise or clockwise to adjust the extension and retraction of the ink cartridge's writing end within the tip's inlet / outlet hole. No significant force or complex maneuvers are required. The design of the limit cap, limit step, and mounting holes ensures a secure connection between the various components of the marker, resulting in structural stability and improving the overall quality of the marker.
[0015] The upper limit step of the handle is designed to prevent the handle from being screwed in too deeply into the pen tube, or to prevent the threaded section from disengaging from the pen tube when the handle is screwed out. It also serves a certain positioning function, making the connection between the handle and the pen tube more accurate and stable. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the main structure of the marker pen structure described in this utility model;
[0017] Figure 2 for Figure 1 Sectional view of AA;
[0018] Figure 3 This is an exploded and cross-sectional view of the marker structure described in this utility model;
[0019] Figure 4 This is an exploded three-dimensional structural diagram of the marker pen structure described in this utility model;
[0020] Figure 5 This is a three-dimensional structural diagram of the marker pen structure described in this utility model. Detailed Implementation
[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0022] Please refer to Figures 1-5 As shown, this utility model discloses a marker pen structure, including a pen tube 1, an ink sac tube 2, a handle 4, and a limiting cap 5. A pen tip 3 is provided at the front end of the ink sac tube 2, which is placed inside the pen tube 1. The front end of the pen tube 1 is a grip end 11, and the writing end of the pen tip 3 is located inside the grip end 11. A first internal thread 12 is provided at the rear end of the pen tube 1, and a first external thread 13 is provided radially on its outer side. A second external thread 41 is provided radially outward at the front end of the handle 4, and the handle 4 is screwed into the first internal thread 12 at the rear end of the pen tube 1 via the second external thread 41. The ink cartridge tube 2 is connected to the front end of the handle 4, so that the writing end of the pen tip 3 can be extended or retracted into the grip end 11 by screwing the handle 4 into or out of the pen tube 1. When the marker is needed, the handle 4 is rotated clockwise, and the handle 4 is gradually screwed out of the pen tube 1, which moves the ink cartridge tube 2 forward, so that the writing end of the pen tip 3 extends out of the grip end 11. When not in use, the handle 4 is rotated counterclockwise, and the handle 4 is screwed into the pen tube 1, which moves the ink cartridge tube 2 backward, so that the writing end of the pen tip 3 retracts into the grip end 11, thereby protecting the pen tip 3.
[0023] The limiting cap 5 has a second internal thread 51 inside, and its end has an axial through hole 52. The rear end of the handle 4 passes outward through the through hole 52. The limiting cap 5 is screwed into the first external thread 13 at the rear end of the pen tube 1 through the second internal thread 51, thereby preventing the handle 4 from being screwed out and detached from the pen tube 1. The setting of the limiting cap 5 not only limits the screwing distance of the handle 4 and prevents the handle 4 from detaching from the pen tube 1, but also plays a certain role in fixing the handle 4, making the structure of the marker pen more stable.
[0024] The diameter of the tail end of the handle 4 is smaller than the diameter of the second external thread 41 at its front end, forming a limiting step 40. The handle 4 is limited and connected to the through hole 52 through the limiting step 40. The upper limiting step 40 of the handle 4 is designed to prevent the handle 4 from being screwed in too deeply into the pen tube 1, or to prevent the threaded section of the handle 4 from disengaging from the pen tube 1 when the handle 4 is screwed out of the pen tube 1. It also plays a certain positioning role, making the connection between the handle 4 and the pen tube 1 more accurate and stable.
[0025] A pen clip 6 is attached to the outside of the pen tube 1 on the outer side of the limiting cap 5, and the rear end of the pen clip 6 is connected to the limiting cap 5. The pen clip 6 makes it convenient for users to clip the marker pen to pockets, books, etc., for easy carrying and storage. The front end of the handle 4 is provided with an axial mounting hole 42, and the tail end of the ink cartridge tube 2 is clamped in the mounting hole 42.
[0026] The ink cartridge tube 2 is capped with a silicone stopper 7 at its tail end. The diameter of the silicone stopper 7 at its tail end is greater than or equal to the diameter of the ink cartridge tube 2, and its front end is press-fitted into the tail end of the ink cartridge tube 2. The silicone stopper 7 effectively prevents ink 8 from leaking from the tail end of the ink cartridge tube 2, and also provides a certain degree of sealing, reducing the contact between ink 8 and air, and slowing down the evaporation rate of ink 8. Furthermore, ink 8 can be replenished into the ink cartridge tube 2 by puncturing the silicone stopper 7 with a needle.
[0027] The ink sac tube 2 is filled with ink 8. The pen tip 3 includes an ink guide 31 and an installation guide 32 for installing the ink guide 31. The front end of the installation guide 32 is provided with an insertion hole 320, and its tail end is connected to the front end of the ink sac tube 2. The pen tube 1 has a hollow conical end 11 with a pen tip inlet / outlet hole 110 at its tip. The front end of the ink guide 31 is set as the writing end and corresponds to the pen tip inlet / outlet hole 110. Its tail end passes through the insertion hole 320. In order to avoid the ink guide 31 being over-inserted into the insertion hole 320, a limiting buckle or step 310 is provided in the middle of the ink guide 31, and a limiting inner edge is also provided in the insertion hole 320. Thus, the installation of the ink guide 31 is limited by the cooperation of the limiting buckle or step 310 with the limiting inner edge.
[0028] A return spring 9 is fitted on the mounting guide 32 between the front end of the ink sac tube 2 and the pen grip end 11. The return spring 9 makes the pen tip 3 retract more smoothly when it retracts to the pen grip end 11, and also plays a certain role in buffering, reducing the collision between the pen tip 3 and the pen grip end 11, and protecting the pen tip 3.
[0029] The pen tube 1 is a metal tube, the handle 4 is a metal handle, and the stop cap 5 is a metal stop cap. The use of metal materials can improve the overall texture and durability of the marker, while also increasing its aesthetic appeal.
[0030] The end of the handle 4, located outside the through hole 52, has radial anti-slip texture 43. The anti-slip texture 43 increases the friction between the user's hand and the handle 4, making it easier and less strenuous to rotate the handle 4, thus improving the convenience of operation.
[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A marker pen structure, comprising a pen tube (1) and an ink sac tube (2), wherein a pen tip (3) is provided at the front end of the ink sac tube (2), the ink sac tube (2) is placed inside the pen tube (1), the front end of the pen tube (1) is a grip end (11), and the writing end of the pen tip (3) is located inside the grip end (11), characterized in that, It also includes a handle (4) and a limiting cap (5). The rear end of the pen tube (1) is provided with a first internal thread (12), and its outer side is provided with a first external thread (13). The front end of the handle (4) is provided with a second external thread (41) on its outer side. The handle (4) is screwed into the first internal thread (12) at the rear end of the pen tube (1) through the second external thread (41) to form a connection. The tail end of the ink sac tube (2) is connected to the front end of the handle (4), so that the handle (5) can be screwed into the pen tube (1) through the first internal thread (12) at the rear end. 4) Screwing in or out of the pen tube (1) allows the writing end of the pen tip (3) to extend or retract to the pen grip end (11); the limiting cap (5) has a second internal thread (51) and an axial through hole (52) at its end. The rear end of the handle (4) passes outward through the through hole (52). The limiting cap (5) is screwed into the first external thread (13) at the rear end of the pen tube (1) through the second internal thread (51) to prevent the handle (4) from being screwed out and detached from the pen tube (1).
2. The marker structure as described in claim 1, characterized in that, The diameter of the tail end of the handle (4) is smaller than the diameter of the second external thread (41) at its front end, and a limiting step (40) is formed. The handle (4) is limited and connected to the through hole (52) through the limiting step (40).
3. The marker structure as described in claim 1, characterized in that, The limiting cap (5) is provided with a pen clip (6) attached to the outside of the pen tube (1), and the rear end of the pen clip (6) is connected to the limiting cap (5).
4. The marker structure as described in claim 1, characterized in that, The front end of the handle (4) is provided with an axial mounting hole (42), and the tail end of the ink sac tube (2) is clamped in the mounting hole (42).
5. The marker structure as described in claim 1 or 4, characterized in that, The end of the ink sac tube (2) is sealed with a silicone plug (7). The diameter of the end of the silicone plug (7) is greater than or equal to the diameter of the ink sac tube (2), and its front end is press-fitted into the end of the ink sac tube (2).
6. The marker structure as described in claim 1, characterized in that, The ink sac tube (2) is filled with ink (8). The pen tip (3) includes an ink guide (31) and an installation guide (32) for installing the ink guide (31). The front end of the installation guide (32) is provided with an insertion hole (320) in the axial direction, and its tail end is connected to the front end of the ink sac tube (2). The pen holding end (11) of the pen tube (1) is hollow conical, and its tip is provided with a pen tip inlet / outlet hole (110). The front end of the ink guide (31) is set as the writing end and is correspondingly set with the pen tip inlet / outlet hole (110). Its tail end is inserted into the insertion hole (320).
7. The marker structure as described in claim 6, characterized in that, A return spring (9) is fitted on the mounting guide (32) between the front end of the ink sac tube (2) and the pen grip end (11).
8. The marker structure as described in claim 1, characterized in that, The pen tube (1) is a metal pen tube, the handle (4) is a metal handle, and the limiting cap (5) is a metal limiting cap.
9. The marker structure as described in claim 1, characterized in that, The handle (4) has anti-slip grooves (43) radially formed at the end outside the through hole.