Post-pressing valve type mark pen

Abstract

The utility model relates to a rear pressure valve type mark pen which comprises a pen point, a pen mouth, a pen holder and an ink storage cavity separating cylinder. An inner cavity of the pen holder comprises a first ink storage cavity separated by an ink storage cavity separation cylinder, and the first ink storage cavity is located on the side close to the pen mouth. The pen holder comprises a separation ring extending in the radial direction, and the separation ring covers the end, facing the pen mouth, of the ink storage cavity separation barrel and separates the first ink storage cavity from an inner cavity of the pen mouth. The separating ring sleeves the pen point; air holes are formed in the separation ring; the pen mouth is provided with an airflow channel; the airflow channel communicates with the outside and the inner cavity of the pen mouth, and the air hole communicates with the inner cavity of the pen mouth and the first ink storage cavity. The mark pen provided by the utility model is beneficial to maintaining air pressure balance between the first ink storage cavity and the outside so as to ensure that ink can smoothly flow out of the first ink storage cavity and provide smooth writing experience for a user. And meanwhile, the air inlet channel is basically not influenced by environmental factors and use duration, and good performance can be kept all the time.

Description

Technical Field

[0001] The utility model relates to the technical field of marker pens, in particular to a rear pressure valve type marker pen. Background Art

[0002] A marker, also known as a permanent marker or a marking pen, is a writing and drawing tool primarily used for marking and drawing. Specifically, markers can be categorized based on the valve position into two types: front-pressure valve markers and rear-pressure valve markers. Front-pressure valve markers operate by pressing the tip at the front of the pen, compressing the internal retractable structure and opening the ink outlet, ultimately releasing ink. Conversely, rear-pressure valve markers operate by pressing the retractable cap at the rear of the pen, pushing the push rod downward, compressing the internal retractable structure and opening the ink outlet, ultimately releasing ink.

[0003] Patent No. CN218777341U discloses a valve pen. Specifically, by pressing the drive cap, the drive cap drives the blocking member to move downward, thereby separating the lower part of the blocking member from the partition. At this time, the spring is in a compressed state and the through hole is open, and the ink in the first liquid storage chamber flows into the second liquid storage chamber through the through hole. Combining the aforementioned patent content and the accompanying drawings, it can be seen that the air return of the valve pen mainly relies on the pores of the pen tip itself. That is, when writing, the ink flows from the second liquid storage chamber to the pen tip, and the outside air enters the second liquid storage chamber through the pores of the pen tip to maintain the air pressure balance between the inside and outside of the pen. However, the ventilation performance of the felt pen tip will be affected by environmental factors and the length of use. For example, the ventilation performance of the felt pen tip will decrease with the increase of the relative humidity of the environment, resulting in a decrease in internal pores, thereby reducing the ventilation performance. For example, as the use time increases, the pen tip may accumulate ink or dirt, thereby blocking the pores and reducing the breathability. When the air pressure inside and outside the pen is unbalanced, the ink flow stability will be affected, causing the ink flow to be fast or slow, affecting the writing quality. Therefore, the back-pressure valve pen, which relies solely on the nib to return air, is prone to unstable ink flow.

[0004] Therefore, there is still a need to improve the existing back-pressure valve pen to solve the problem of unstable ink flow in the existing back-pressure valve pen. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a rear pressure valve type marker pen to solve the problem of unstable ink flow in existing rear pressure valve pens.

[0006] To achieve the above-mentioned objectives, the present invention provides a rear-pressure valve type marker pen, comprising a pen tip, a pen nozzle, a pen body, and an ink storage chamber dividing tube; the inner cavity of the pen body comprises a first ink storage chamber separated by the ink storage chamber dividing tube, and the first ink storage chamber is located on a side close to the pen nozzle; the pen body comprises a dividing ring extending in a radial direction, the dividing ring covers one end of the ink storage chamber dividing tube facing the pen nozzle, and separates the first ink storage chamber from the inner cavity of the pen nozzle; the dividing ring covers the pen tip; the dividing ring is provided with an air hole; the pen nozzle is provided with an air flow channel; the air flow channel connects the outside world and the inner cavity of the pen nozzle, and the air hole connects the inner cavity of the pen nozzle and the first ink storage chamber.

[0007] In some embodiments, the air holes are located on the inner wall of the separation ring.

[0008] In some embodiments, the end of the pen tip that penetrates the separation ring is a conical head, and there is only one air hole.

[0009] In some embodiments, the separating ring includes a connecting ring located in the middle; the two ends of the connecting ring protrude toward the pen tip and the ink storage chamber separating tube respectively; the pen tip penetrates the connecting ring; and the air hole is located on the inner cavity wall of the connecting ring.

[0010] In some embodiments, the end of the pen tip that penetrates the separator ring is a cylindrical head; there are at least four air holes, which are evenly distributed around the central axis of the separator ring; the inner cavity of the separator ring and all the air holes cooperate to form a regular polygonal cavity.

[0011] In some embodiments, the air holes are located at the edge of the separation ring.

[0012] In some embodiments, the separation ring includes a protrusion protruding toward the ink storage chamber separation cylinder; and the air hole is located on the protrusion.

[0013] In some embodiments, the air flow channel is located at the front end of the pen nozzle and between the inner cavity wall of the pen nozzle and the pen tip.

[0014] In some embodiments, the pen tip includes ribs extending in a radial direction; there are at least three ribs, which are evenly distributed circumferentially around the central axis of the pen tip; along the radial direction of the pen tip, all the ribs cooperate to clamp the pen tip; along the circumferential direction of the pen tip, two adjacent ribs cooperate to form an airflow channel.

[0015] In some embodiments, the pen holder includes a main body tube; the separation ring is formed at the front end of the main body tube; the ink storage chamber separation cylinder divides the inner cavity of the main body tube into the first ink storage chamber and the second ink storage chamber;

[0016] The pen barrel further comprises a connecting tube; the connecting tube is formed on the separating ring and protrudes toward the pen tip; the connecting tube is inserted into the pen tip and has an interference fit therewith.

[0017] Compared to the prior art, the present invention has the following beneficial effects: the airflow channel, the inner cavity of the nib, and the air holes form a channel for air intake between the outside world and the first ink storage chamber. After ink flows out of the first ink storage chamber, the air pressure within the first ink storage chamber decreases, and the outside air can enter the first ink storage chamber through the airflow channel, the inner cavity of the nib, and the air holes, thereby maintaining the air pressure balance between the first ink storage chamber and the outside world, ensuring that ink can flow smoothly from the first ink storage chamber, providing the user with a smooth writing experience. At the same time, compared to the pen tip, the air intake channel formed by the airflow channel, the inner cavity of the nib, and the air holes is basically unaffected by environmental factors and usage time, and can always maintain good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the rear pressure valve type marker provided by the utility model;

[0019] Figure 2 This is a front view of the rear pressure valve type marker provided by the utility model;

[0020] Figures 3 to 5 This is an example diagram of the internal structure of the rear pressure valve marker provided by the present invention;

[0021] Figure 6 This is an example diagram of the distribution of the airflow channel of the rear pressure valve marker provided by the present invention;

[0022] Figure 7 This is another example diagram of the internal structure of the rear pressure valve type marker provided by the present invention;

[0023] Figures 8 to 10 This is an example diagram of the distribution of the air holes of the rear pressure valve type marker provided by the utility model;

[0024] Figures 11 to 13 This is another example diagram of the distribution of the air holes of the rear pressure valve type marker provided by the present invention;

[0025] Figure 14 This is another distribution example diagram of the air flow channel of the rear pressure valve type marker provided by the utility model. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] A marker is a writing and drawing tool primarily used for marking and drawing. More specifically, a rear-valve marker uses a retractable cap located at the rear end of the pen, which pushes the push rod downward, compressing the internal retractable structure and opening the ink channel, ultimately releasing ink.

[0028] In the existing technology, air intake relies solely on the pores of the pen tip itself. As the environment changes and the length of use increases, the air permeability of the pen tip will decrease, resulting in an imbalance in the air pressure inside and outside the pen, and the ink flows faster or slower.

[0029] like Figures 1 to 3 As shown, the present invention provides a rear pressure valve type marker pen 1. Specifically, as Figures 4 and 5 As shown, it includes a pen tip 10, a pen nozzle 20, a pen body 30, and an ink storage chamber dividing tube 40; the inner cavity of the pen body 30 includes a first ink storage chamber 380 separated by the ink storage chamber dividing tube 40, and the first ink storage chamber 380 is located on the side close to the pen nozzle 20; the pen body 30 includes a dividing ring 301 extending in the radial direction, the dividing ring 301 covers the end of the ink storage chamber dividing tube 40 facing the pen nozzle 20, and separates the first ink storage chamber 380 from the inner cavity of the pen nozzle 20; the dividing ring 301 covers the pen tip 10; the dividing ring 301 is provided with an air hole 381; the pen nozzle 20 is provided with an air flow channel 280; the air flow channel 280 connects the outside and the inner cavity of the pen nozzle 20, and the air hole 381 connects the inner cavity of the pen nozzle 20 and the first ink storage chamber 380.

[0030] Compared to the prior art, the aforementioned rear-pressure valve marker 1, with its airflow channel 280, the inner cavity of the nib 20, and the air hole 381, forms a channel for air intake between the outside world and the first ink reservoir 380. After ink flows out of the first ink reservoir 380, the air pressure within the first ink reservoir 380 decreases, allowing outside air to flow through the airflow channel 280, the inner cavity of the nib 20, and the air hole 381, ultimately entering the first ink reservoir 380. This maintains the air pressure balance between the first ink reservoir 380 and the outside world, ensuring smooth ink flow from the first ink reservoir 380 and providing a smooth writing experience for the user. Furthermore, compared to the pen tip 10, the air intake channel formed by the airflow channel 280, the inner cavity of the nib 20, and the air hole 381 is largely unaffected by environmental factors or usage, ensuring consistent performance.

[0031] In addition, front-pressure valve markers control ink flow by pressing the nib, which requires greater pressure and a hard nib to meet user needs. Rear-pressure valve markers, on the other hand, control ink flow through the back of the pen, significantly reducing the pressure and frequency of the nib's pressure. This allows for a wider selection of nib materials, providing a richer user experience.

[0032] In some embodiments, as Figures 3 to 5 As shown, the air hole 381 is located at the edge of the separator ring 301, while the pen tip 10 is inserted into the middle of the separator ring 301. This eliminates the need to consider the pen tip 10 when designing the air hole 381, reducing the design complexity of the air hole 381. Furthermore, in some embodiments, the separator ring 301 includes a protrusion 302 that projects toward the ink reservoir separator tube 40. The air hole 381 is located on the protrusion 302. When the ink has large pigment particles, particularly acrylic marker ink, the protrusion 302 effectively prevents the ink from settling and blocking the air hole 381 when the user holds the pen at an angle or vertically, ensuring that the air hole 381 can properly receive air.

[0033] In some embodiments, as Figures 4 and 5 As shown, the airflow channel 280 is located at the front end of the pen tip 20 and between the inner wall of the pen tip 20 and the pen tip 10. This arrangement allows the airflow channel 280 to be substantially opposite to the air hole 381, so that the airflow is more direct and has less resistance. Figures 5 and 6 As shown, the pen tip 20 includes radially extending ribs 201. There are at least three ribs 201, evenly distributed around the central axis of the pen tip 20. Along the radial direction of the pen tip 20, all ribs 201 cooperate to clamp the pen tip 10. Along the circumference of the pen tip 20, two adjacent ribs 201 cooperate to form an airflow channel 280. The ribs 201 not only function to clamp the pen tip 10 but also form the airflow channel 280, making them highly practical. Multiple airflow channels 280 ensure a larger total air intake volume, help provide a more uniform flow field, and reduce flow field non-uniformity. Furthermore, in some embodiments, there are four or six ribs 201.

[0034] In some embodiments, as Figure 4 、 Figure 7As shown, the pen body 30 includes a main body tube 303; the separation ring 301 is formed at the front end of the main body tube 303. The one-piece molding can reduce the number of parts assembly steps and is conducive to ensuring that the performance tends to be consistent; the ink storage chamber separation cylinder 40 divides the inner cavity of the main body tube 303 into a first ink storage chamber 380 and a second ink storage chamber 382. The second ink storage chamber 382 serves as the main ink storage chamber, and the first ink storage chamber 380 serves as a buffer chamber. The capacity of the second ink storage chamber 382 is significantly larger than that of the first ink storage chamber 380. This arrangement is particularly suitable for acrylic marker ink that needs to be manually shaken before use to mix the color powder evenly. After mixing evenly, the ink in the second ink storage chamber 382 flows into the first ink storage chamber 380 for painting or writing; the pen body 30 also includes a connecting cylinder 304; the connecting cylinder 304 is formed on the separation ring 301 and protrudes toward the pen tip 20 to facilitate the assembly of the pen tip 20. The connecting cylinder 304 is inserted into the pen tip 20 and has an interference fit therewith. Furthermore, in some embodiments, such as Figure 4 、 Figure 7 As shown, the pen body 30 also includes a tail barrel 305 and an end cap 306. One end of the tail barrel 305 is inserted into the main body tube 303 and has an interference fit therewith, while the other end of the tail barrel 305 is inserted into the end cap 306 and has an interference fit therewith. Furthermore, the back-pressure valve assembly 50 includes a spring (not shown), a plug 501, a connecting tube 502, a silicone sheet 503, and a pressing cap 504. The plug 501 is movably inserted into the ink reservoir separation tube 40. The two ends of the spring respectively abut against the step of the ink reservoir separation tube 40 and the skirt of the plug 501. When the user releases the pressing cap 504, the spring provides a reset force for the plug 501. One end of the connecting tube 502 is inserted into and fixed to the plug 501, while the other end of the connecting tube 502 abuts against the silicone sheet 503. The outer edge / circumference of the silicone sheet 503 is fixed to the interior of the tail barrel 305. The pressing cap 504 is movably inserted into the end cap 306 and can be pressed by the user to control ink flow.

[0035] In some embodiments, as Figures 8 to 13 As shown, the air hole 381 is located on the inner wall of the separation ring 301 . In addition to the function of supplying gas to the first ink storage chamber 380 , the air hole 381 also has the function of assisting in clamping the pen tip 10 .

[0036] Based on the air hole 381 being located on the inner wall of the separation ring 301:

[0037] Furthermore, in some embodiments, Figure 8 As shown, the end of the pen tip 10 that penetrates the separation ring 301 is a conical head, and there is only one air hole 381. Furthermore, in some embodiments, as Figures 9 and 10As shown, the separating ring 301 includes a connecting ring 307 located in the middle; the two ends of the connecting ring 307 protrude toward the pen tip 20 and the ink storage chamber separating tube 40 respectively, which not only improves the strength of the plastic parts, but also prevents the ink toner from settling and blocking the air hole 381 when the pen is placed at an angle or upright, so as to ensure that the air hole 381 can normally take in air; the pen tip 10 penetrates the connecting ring 307; the air hole 381 is located on the inner cavity wall of the connecting ring 307.

[0038] Furthermore, in some embodiments, Figures 11 to 13 As shown, the end of the pen tip 10 that penetrates the separator ring 301 is cylindrical; there are at least four air holes 381, evenly distributed around the central axis of the separator ring 301; the inner cavity of the separator ring 301 and all the air holes 381 cooperate to form a regular polygonal cavity. Furthermore, in some embodiments, the inner cavity of the separator ring 301 and all the air holes 381 cooperate to form a regular hexagonal cavity or a regular octagonal cavity.

[0039] In some embodiments, as Figure 14 As shown, the airflow channel 280 is located in the middle of the pen tip 20, that is, the airflow channel 280 is located on the side close to the separation ring 301, and penetrates the pen tip 20 in the radial direction, thereby connecting the outside world with the inner cavity of the pen tip 20. When multiple symmetrically distributed airflow channels 280 are provided, it is beneficial to reduce weight and improve aesthetics.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rear-pressure valve marker pen, comprising a nib, a nozzle, a barrel, and an ink reservoir separator. The barrel comprises a first ink reservoir separated by the nozzle, and the first ink reservoir is located near the nozzle. The pen is characterized by: The pen barrel includes a separating ring extending in a radial direction, the separating ring covers the end of the ink storage chamber separating tube facing the pen tip and separates the first ink storage chamber from the inner cavity of the pen tip; the separating ring covers the pen tip; The separating ring is provided with an air hole; the pen tip is provided with an air flow channel; the air flow channel connects the outside with the inner cavity of the pen tip, and the air hole connects the inner cavity of the pen tip with the first ink storage cavity.

2. The rear-pressure valve marker pen according to claim 1, characterized in that: The air hole is located on the inner cavity wall of the separation ring.

3. The rear-pressure valve marker pen according to claim 2, characterized in that: One end of the pen tip that penetrates into the separation ring is a conical head, and there is only one air hole.

4. The rear-pressure valve marker pen according to claim 3, characterized in that: The separation ring includes a connecting ring located in the middle; the two ends of the connecting ring protrude toward the pen tip and the ink storage chamber separation tube respectively; the pen tip penetrates the connecting ring; and the air hole is located on the inner cavity wall of the connecting ring.

5. The rear-pressure valve marker pen according to claim 2, characterized in that: One end of the pen tip that penetrates the separation ring is a cylindrical head; there are at least four air holes, which are evenly distributed around the central axis of the separation ring; the inner cavity of the separation ring and all the air holes cooperate to form a regular polygonal cavity.

6. The rear-pressure valve marker pen according to claim 1, characterized in that: The air holes are located at the edge of the separation ring.

7. The rear-pressure valve marker pen according to claim 6, characterized in that: The separation ring includes a protrusion protruding toward the ink storage chamber separation cylinder; the air hole is located on the protrusion.

8. The rear-pressure valve marker pen according to any one of claims 1 to 7, characterized in that: The air flow channel is located at the front end of the pen tip and between the inner cavity wall of the pen tip and the pen tip.

9. The rear-pressure valve marker pen according to claim 8, characterized in that: The pen tip includes ribs extending in a radial direction; at least three ribs are provided and are evenly distributed circumferentially around the central axis of the pen tip; along the radial direction of the pen tip, all the ribs cooperate to clamp the pen tip; along the circumferential direction of the pen tip, two adjacent ribs cooperate to form an airflow channel.

10. The rear-pressure valve marker pen according to claim 1, characterized in that: The pen holder includes a main body tube; the separation ring is formed at the front end of the main body tube; the ink storage chamber separation cylinder divides the inner cavity of the main body tube into the first ink storage chamber and the second ink storage chamber; The pen barrel further comprises a connecting tube; the connecting tube is formed on the separating ring and protrudes toward the pen tip; the connecting tube is inserted into the pen tip and has an interference fit therewith.

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