Acrylic plastic marker pen and production process thereof

Abstract

The present invention relates to an acrylic plastic marker pen and a production process thereof, and relates to the technical field of marker pens, including a pen barrel, a connecting ring, a pen tip, a diaphragm and a fixing mechanism, wherein the connecting ring is arranged on the inner wall of one end of the pen barrel, the pen tip includes an ink immersion end and an ink outlet end, the end of the ink immersion end away from the ink outlet end is provided with a rounded corner, and an isolation layer is coated on the arc surface of the ink immersion end with the rounded corner, the diaphragm is arranged on the connecting ring, an ink outlet hole is provided on the diaphragm, the ink immersion end of the pen tip is inserted into the ink outlet hole, and the fixing mechanism is used to fix the pen tip on the connecting ring. The present invention can block the ink outlet hole on the diaphragm by the rounded corner of the ink immersion end of the pen tip coated with an isolation layer when the pen tip does not need to discharge ink, thereby blocking the ink outlet channel, and reducing the probability of dye ink flowing out when the marker pen is used, thereby reducing the probability of the marker pen leaking.

Description

Technical Field

[0001] The invention relates to the technical field of marker pens, in particular to an acrylic plastic marker pen and a production process thereof. Background Art

[0002] Marker, also known as a marker pen, is a kind of colored drawing pen used for writing or painting. It contains ink and is usually capped. It generally has a hard pen head. Its pigment is volatile and is used for quick one-time drawing. It is often used in designing objects, advertising slogans, posters or other art creations. It is divided into oil-based, water-based and alcohol-based. It has the characteristics of bright colors, convenient coloring, obvious brushstrokes and easy to carry.

[0003] There are usually two ways to produce existing marker pens. One is to add ink directly into the pen barrel, and the ink flows out along the gap on the pen tip. The other is to add a cotton-like pen core into the pen barrel, immerse the ink in the cotton-like pen core, and then contact the pen tip with the cotton-like pen core, so that the ink in the cotton-like pen core flows out along the pen tip.

[0004] However, since the ink in the pen barrel is in a fluid state, when there is a gap between the pen tip and the fixed end of the pen tip, the ink may flow out directly from the gap, thereby reducing the writing quality of the marker pen. Summary of the invention

[0005] In order to reduce the probability of ink directly flowing out from the gap between a pen tip and a fixed end of the pen tip, the present invention provides an acrylic plastic marker pen and a production process thereof.

[0006] In a first aspect, the present invention provides an acrylic plastic marker pen, comprising a pen barrel, a connecting ring, a pen tip, a diaphragm and a fixing mechanism, wherein the connecting ring is arranged on the inner wall of one end of the pen barrel, the pen tip comprises an ink immersion end and an ink outlet end, the end of the ink immersion end away from the ink outlet end is provided with a rounded corner, an insulating layer is coated on the arc surface of the ink immersion end with the rounded corner, the diaphragm is arranged on the connecting ring, an ink outlet hole is provided on the diaphragm, the ink immersion end of the pen tip is inserted into the ink outlet hole, and the fixing mechanism is used to fix the pen tip on the connecting ring.

[0007] Optionally, the fixing mechanism includes a first connecting tube, a second connecting tube, and a first fixing ring, one end of the first connecting tube is arranged on the connecting ring, the other end of the first connecting tube is provided with an internal thread, one end of the second connecting tube is provided with an external thread, the second connecting tube is threadedly connected to the first connecting tube, the first fixing ring is arranged on the first connecting tube, a plurality of guide columns are arranged on the inner circumference surface of the second connecting tube, a guide channel is formed between the plurality of guide columns, and the ink outlet end of the pen tip is slidably connected to the second connecting tube through the guide channel.

[0008] Optionally, the fixing mechanism also includes an elastic component, which includes a spring and a sliding ring. The sliding ring is slidably connected in the first connecting tube, and the sliding ring is located between the connecting ring and the first fixed ring. The spring is arranged in the first connecting tube, one end of the spring abuts against the connecting ring, and the other end of the spring abuts against the sliding ring. The ink immersion end of the pen tip passes through the sliding ring and the spring and is inserted into the ink outlet hole.

[0009] Optionally, a sealing ring is further provided on the first fixing ring, and one end of the second connecting tube having an external thread abuts against the sealing ring.

[0010] Optionally, a conical cap is provided at one end of the second connecting tube away from the first fixing ring.

[0011] Optionally, an ink collecting cylinder is provided in the first connecting cylinder, a guide hole is provided in the ink collecting cylinder, a diameter of the guide hole at one end away from the diaphragm is larger than a diameter at one end close to the diaphragm, and the end of the ink collecting cylinder close to the diaphragm is provided on the connecting ring.

[0012] Optionally, the end of the pen barrel away from the pen tip is threadedly connected to a pen cap, the pen cap is flush with the pen barrel, the end of the pen barrel away from the pen cap is movably connected to a pen cover, and the end of the pen cover close to the pen barrel is movably connected between the pen barrel and the first connecting tube.

[0013] Optionally, a plurality of limiting posts are arranged on the pen cap, a cap removal ring is arranged at one end of the pen cap away from the pen barrel, and a plurality of limiting plates are arranged on the inner wall of the cap removal ring.

[0014] In a second aspect, the present invention provides a production process for an acrylic plastic marker pen, and the production process for an acrylic plastic marker pen comprises the following steps:

[0015] S1: manufacturing the shapes of the pen barrel, the pen cover and the pen cap by a mold, wherein the connecting ring, the first connecting barrel and the ink collecting barrel are integrally formed;

[0016] S2: Bonding the diaphragm to the connecting ring and opening an ink outlet hole on the diaphragm;

[0017] S3: placing the spring in the first connecting tube, and placing the sliding ring in the first connecting tube to contact the spring. After the spring and the sliding ring are placed, welding the first fixing ring in the first connecting tube;

[0018] S4: Connect the pen tip to the second connecting tube through the guide channel, then thread the second connecting tube to the first connecting tube, and cover the pen tip with a pen cap, which is movably connected to the pen tube;

[0019] S5: Add ink to the pen barrel. After the ink is added, the pen cap is threadedly connected to the end of the pen barrel away from the pen cover.

[0020] The present invention relates to an acrylic plastic marker pen and a production process thereof, which has at least the following effects:

[0021] 1. When the pen tip does not need to discharge ink, the ink outlet hole on the diaphragm is blocked by the rounded corner of the ink immersion end of the pen tip coated with an isolation layer, thereby blocking the ink outlet channel. When the marker pen is used up, the probability of dye ink flowing out is reduced, thereby reducing the probability of the marker pen leaking. When the marker pen is used, the ink outlet hole on the diaphragm is blocked by the rounded corner of the ink immersion end of the pen tip coated with an isolation layer, thereby reducing the probability of a large amount of dye ink leaking when writing or drawing, thereby improving the quality of writing or drawing.

[0022] 2. When the pen tip needs to be replaced or the pen tip needs to be cleaned due to the solidification of the dye ink, the second connecting tube is twisted to separate the second connecting tube from the first connecting tube, and the pen tip is taken out at the same time. At this time, the pen tip can be pulled out from both ends of the second connecting tube for cleaning or replacement. If only the pen tip is replaced, it is only necessary to pull out the pen tip from the end of the second connecting tube away from the first connecting tube and replace it with a new one, thereby improving the utilization rate of the pen body.

[0023] 3. When dye ink needs to be added to the pen barrel, pull the pen cap out of the pen barrel and insert the end of the pen cap with a cap removal ring into the pen cap. At this time, the limiting piece is clamped between every two limiting columns. Then, the pen cap is rotated to rotate the pen cap and then the pen cap is removed. When dye ink does not need to be added to the pen barrel, the end of the pen cap without a cap removal ring is plugged into the pen cap. Since both ends of the pen cap can be plugged into the pen cap, the probability of the pen cap loosening when the pen cap is accidentally touched is reduced, thereby reducing the risk of ink leakage.

[0024] 4. The setting of the ink collecting cylinder makes the dye ink gather above the diaphragm. When the ink-immersing end of the pen tip exceeds the height of the diaphragm after being pressed, the ink-immersing efficiency is improved, thereby saving debris or preparation time before painting. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0027] Figure 2 for Figure 1 Schematic cross-sectional view of ;

[0028] Figure 3 for Figure 2 Enlarged view of part A in the middle;

[0029] Figure 4 This is a display diagram of the diaphragm and the pen tip;

[0030] Figure 5 This is a schematic diagram of the pen cap structure of Example 1 of the present application;

[0031] Figure 6 This is a schematic diagram of the pen cap structure of Example 1 of the present application;

[0032] Figure 7 This is a schematic diagram of the structure of Example 2 of the present application.

[0033] Among them, the reference numerals in the figure are:

[0034] 1. Pen holder; 2. Connecting ring; 3. Pen tip; 31. Ink immersion end; 32. Ink outlet end; 33. Rounded corner; 4. Diaphragm; 41. Ink outlet hole; 42. Expansion joint; 5. Fixing mechanism; 51. First connecting tube; 52. Second connecting tube; 53. First fixing ring; 54. Elastic component; 541. Spring; 542. Sliding ring; 55. Guide column; 6. Sealing ring; 7. Conical cap; 8. Ink collecting cylinder; 9. Guide hole; 10. Pen cap; 11. Pen cover; 12. Limiting column; 13. Cap removal ring; 14. Limiting plate. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Marker, also known as a marker pen, is a kind of colored drawing pen used for writing or painting. It contains ink and is usually capped. It generally has a hard pen head. Its pigment is volatile and is used for quick one-time drawing. It is often used in designing objects, advertising slogans, posters or other art creations. It is divided into oil-based, water-based and alcohol-based. It has the characteristics of bright colors, convenient coloring, obvious brushstrokes and easy to carry.

[0039] There are usually two ways to produce existing marker pens. One is to add ink directly into the pen barrel, and the ink flows out along the gap on the pen tip. The other is to add a cotton-like pen core into the pen barrel, immerse the ink in the cotton-like pen core, and then contact the pen tip with the cotton-like pen core, so that the ink in the cotton-like pen core flows out along the pen tip.

[0040] However, since the ink in the pen barrel is in a fluid state, when there is a gap between the pen tip and the fixed end of the pen tip, the ink may flow out directly from the gap, thereby reducing the writing quality of the marker pen.

[0041] Based on this, in order to reduce the probability of ink flowing out directly from the gap between the pen tip and the fixed end of the pen tip, the embodiment of the present application provides the following solution.

[0042] Example 1: Please refer to Figure 1-Figure 6, the embodiment of the present application provides an acrylic plastic marker pen, an acrylic plastic marker pen comprising a pen barrel 1, a connecting ring 2, a pen tip 3, a diaphragm 4 and a fixing mechanism 5, the fixing mechanism 5 comprising a first connecting tube 51, a second connecting tube 52, a first fixing ring 53 and an elastic component 54, the elastic component 54 comprising a spring 541 and a sliding ring 542, the connecting ring 2 is arranged on the inner wall of one end of the pen barrel 1, the pen tip 3 comprises an ink immersion end 31 and an ink outlet end 32, the ink immersion end 31 is provided with a fillet 33 at one end away from the ink outlet end 32, an isolation layer is coated on the arc surface of the ink immersion end 31 with the fillet 33, the diaphragm 4 is arranged on the connecting ring 2, an ink outlet hole 41 is provided on the diaphragm 4, wherein the diaphragm 4 is made of elastic material, one end of the first connecting tube 51 is arranged on the connecting ring 2, the other end of the first connecting tube 51 is provided with an internal thread, the second connecting One end of the connecting tube 52 is provided with an external thread, the second connecting tube 52 is threadedly connected to the first connecting tube 51, the first fixing ring 53 is arranged on the first connecting tube 51, and a plurality of guide columns 55 are arranged on the inner circumference of the second connecting tube 52, and a guide channel is formed between the plurality of guide columns 55, the ink outlet end 32 of the nib 3 is slidably connected to the second connecting tube 52 through the guide channel, the sliding ring 542 is slidably connected in the first connecting tube 51, and the sliding ring 542 is located between the connecting ring 2 and the first fixing ring 53, the spring 541 is arranged in the first connecting tube 51, one end of the spring 541 abuts against the connecting ring 2, and the other end of the spring 541 abuts against the sliding ring 542, the ink immersion end 31 of the nib 3 passes through the sliding ring 542 and the spring 541 is penetrated into the ink outlet hole 41, so that the diaphragm 4 is close to the ink immersion end 31 of the nib 3.

[0043] With such a configuration, when using the marker pen, dye ink is added to the pen barrel 1, and then the nib 3 is pressed downward so that the nib 3 is retracted into the second connecting tube 52. At this time, the ink-immersing end 31 of the nib 3 will slide and rub against the diaphragm 4, and the ink-immersing end 31 of the nib 3 will penetrate into the pen barrel 1 and contact the dye ink. Then, the pressing of the nib 3 is stopped. At this time, under the action of the spring 541 and the sliding slide, the nib 3 extends out of the second connecting tube 52. At this time, the fillet 33 coated with the isolation layer contacts the diaphragm 4 and blocks the ink outlet hole 41 on the diaphragm 4. When the nib 3 is not discharging ink smoothly, continuously pressing the nib 3 several times can make the nib 3 discharging ink smoothly. When the pen tip 3 does not need to discharge ink, the ink outlet hole 41 on the diaphragm 4 is blocked by the rounded corner 33 coated with an isolation layer at the ink immersion end 31 of the pen tip 3, thereby blocking the ink outlet channel. When the marker pen is not used, the probability of dye ink flowing out is reduced, thereby reducing the probability of the marker pen leaking. When the marker pen is used, the ink outlet hole 41 on the diaphragm 4 is blocked by the rounded corner 33 coated with an isolation layer at the ink immersion end 31 of the pen tip 3, thereby reducing the probability of a large amount of dye ink leaking when writing or drawing, thereby improving the quality of writing or drawing.

[0044] When the pen tip 3 needs to be replaced or the pen tip 3 needs to be cleaned due to the solidification of the dye ink, the second connecting tube 52 is twisted to separate the second connecting tube 52 from the first connecting tube 51, and the pen tip 3 is taken out at the same time. At this time, the pen tip 3 can be pulled out from both ends of the second connecting tube 52 for cleaning or replacement. If only the pen tip 3 is to be replaced, the pen tip 3 only needs to be pulled out from the end of the second connecting tube 52 away from the first connecting tube 51, and a new pen tip 3 is replaced, thereby improving the utilization rate of the pen body.

[0045] Reference Figure 3 The first fixing ring 53 is also provided with a sealing ring 6, and one end of the second connecting tube 52 with an external thread abuts against the sealing ring 6. The end of the second connecting tube 52 away from the first fixing ring 53 is provided with a conical cap 7.

[0046] In this way, the setting of the sealing ring 6 makes the connection between the first connecting tube 51 and the second connecting tube 52 tighter, thereby improving the sealing between the first connecting tube 51 and the second connecting tube 52, thereby reducing the probability of ink leakage; the setting of the conical cap 7 makes the conical cap 7, the guide channel formed by the multiple guide columns 55 and the ink outlet hole 41 on the diaphragm 4 on the same axis, so that when replacing the pen tip 3, the direction in which the pen tip 3 is inserted into the second connecting tube 52 is straighter, thereby increasing the probability of the ink immersion end 31 of the pen tip 3 being successfully inserted into the ink outlet hole 41.

[0047] Reference Figure 3 and Figure 4An ink collecting cylinder 8 is arranged in the first connecting cylinder 51, and a guide hole 9 is opened in the ink collecting cylinder 8. The diameter of the guide hole 9 away from the diaphragm 4 is larger than the diameter of the end close to the diaphragm 4, and the end of the ink collecting cylinder 8 close to the diaphragm 4 is arranged on the connecting ring 2.

[0048] In this way, the ink collecting cylinder 8 is arranged so that the dye ink is gathered above the diaphragm 4. When the ink immersion end 31 of the pen tip 3 exceeds the height of the diaphragm 4 after being pressed, the ink immersion efficiency is improved, thereby saving debris or preparation time before painting.

[0049] Reference Figure 1 , Figure 2 , Figure 5 and Figure 6 The end of the pen barrel 1 away from the pen tip 3 is threadedly connected with a pen cap 10, and the pen cap 10 is flush with the pen barrel 1. The end of the pen barrel 1 away from the pen cap 10 is movably connected with a pen cover 11, and the end of the pen cover 11 close to the pen barrel 1 is movably connected between the pen barrel 1 and the first connecting tube 51. The pen cap 10 is provided with a plurality of limiting columns 12, and the end of the pen cover 11 away from the pen barrel 1 is provided with a cap removal ring 13, and the inner wall of the cap removal ring 13 is provided with a plurality of limiting pieces 14.

[0050] With such arrangement, when dye ink needs to be added to the pen barrel 1, the pen cover 11 is pulled out from the pen barrel 1, and one end of the pen cover 11 provided with the cap removal ring 13 is inserted into the pen cap 10. At this time, the limiting piece 14 is clamped between every two limiting columns 12. Thereafter, the pen cover 11 is rotated to rotate the pen cap 10, and then the pen cap 10 is removed. When dye ink does not need to be added to the pen barrel 1, one end of the pen cover 11 not provided with the cap removal ring 13 is plugged into the pen cap 10. Since both ends of the pen cover 11 can be plugged into the pen cap 10, the probability of the pen cap 10 becoming loose when the pen cover 11 is accidentally touched is reduced, thereby reducing the risk of ink leakage.

[0051] The implementation principle of an acrylic plastic marker pen in the present application embodiment is as follows:

[0052] When using the marker pen, add dye ink to the pen barrel 1, then press the nib 3 downward to retract the nib 3 into the second connecting tube 52. At this time, the ink-immersing end 31 of the nib 3 will slide and rub against the diaphragm 4, and the ink-immersing end 31 of the nib 3 will penetrate into the pen barrel 1 and contact the dye ink. Then, stop pressing the nib 3. At this time, under the action of the spring 541 and the sliding slide, the nib 3 extends out of the second connecting tube 52. At this time, the fillet 33 coated with the isolation layer contacts the diaphragm 4 and blocks the ink outlet hole 41 on the diaphragm 4. When the nib 3 does not discharge ink smoothly, continue pressing the nib 3 several times to make the nib 3 discharge ink smoothly.

[0053] When the pen tip 3 needs to be replaced or the pen tip 3 needs to be cleaned due to the solidification of the dye ink, the second connecting tube 52 is twisted to separate the second connecting tube 52 from the first connecting tube 51 and take out the pen tip 3 at the same time. At this time, the pen tip 3 can be pulled out from both ends of the second connecting tube 52 for cleaning or replacement.

[0054] When dye ink needs to be added to the pen barrel 1, the pen cover 11 is pulled out from the pen barrel 1, and the end of the pen cover 11 provided with the cap removal ring 13 is inserted into the pen cap 10. At this time, the limiting piece 14 is clamped between every two limiting columns 12. Thereafter, the pen cover 11 is rotated to make the pen cap 10 rotate, and then the pen cap 10 is removed; when dye ink does not need to be added to the pen barrel 1, the end of the pen cover 11 without the cap removal ring 13 is inserted into the pen cap 10.

[0055] Example 2, this application example discloses an acrylic plastic marker pen, referring to Figure 7 The difference between the embodiment of the present application and the embodiment 1 is that an expansion joint 42 is provided on the diaphragm 4, and the end of the ink immersion end 31 of the pen tip 3 away from the ink outlet end 32 is plum blossom-shaped.

[0056] The implementation principle of an acrylic plastic marker pen in the embodiment of the present application is: when the ink concentration of the pen tip 3 is insufficient, when the pen tip 3 is pressed, the plum blossom-shaped ink immersion end 31 passes through the multiple expansion gaps 42 provided on the diaphragm 4 and contacts the ink in the pen barrel 1. When the pen tip 3 rebounds, a small amount of ink continues to flow through the expansion gaps 42 to the plum blossom-shaped ink immersion end 31, thereby improving the smoothness of writing.

[0057] Embodiment 3: The embodiment of the present application also provides a production process for an acrylic plastic marker pen, and the production process for an acrylic plastic marker pen comprises the following steps:

[0058] S1: The shapes of the pen barrel 1, the pen cover 11 and the pen cap 10 are manufactured by a mold, wherein the connecting ring 2, the first connecting tube 51 and the ink collecting tube 8 are integrally formed;

[0059] S2: bonding the diaphragm 4 to the connecting ring 2, and opening an ink outlet hole 41 on the diaphragm 4;

[0060] S3: placing the spring 541 in the first connecting tube 51 , and placing the sliding ring 542 in the first connecting tube 51 to contact the spring 541 . After the spring 541 and the sliding ring 542 are placed, welding the first fixing ring 53 in the first connecting tube 51 .

[0061] S4: Connect the pen tip 3 to the second connecting tube 52 through the guide channel, then thread the second connecting tube 52 to the first connecting tube 51, and cover the pen tip 3 with the pen cap 11, and movably connect it to the pen barrel 1;

[0062] S5: Ink is added into the pen barrel 1. After the ink is added, the pen cap 10 is threadedly connected to the end of the pen barrel 1 away from the pen cover 11.

[0063] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An acrylic plastic marker pen, characterized in that: The invention comprises a pen barrel (1), a connecting ring (2), a pen tip (3), a diaphragm (4) and a fixing mechanism (5), wherein the connecting ring (2) is arranged on the inner wall of one end of the pen barrel (1), the pen tip (3) comprises an ink immersion end (31) and an ink outlet end (32), the end of the ink immersion end (31) away from the ink outlet end (32) is provided with a rounded corner (33), an insulating layer is coated on the arc surface of the ink immersion end (31) provided with the rounded corner (33), the diaphragm (4) is arranged on the connecting ring (2), an ink outlet hole (41) is provided on the diaphragm (4), the ink immersion end (31) of the pen tip (3) is inserted into the ink outlet hole (41), and the fixing mechanism (5) is used to fix the pen tip (3) on the connecting ring (2); the fixing mechanism The structure (5) comprises a first connecting tube (51), a second connecting tube (52), and a first fixing ring (53), wherein one end of the first connecting tube (51) is arranged on the connecting ring (2), the other end of the first connecting tube (51) is provided with an internal thread, one end of the second connecting tube (52) is provided with an external thread, the second connecting tube (52) is threadedly connected to the first connecting tube (51), the first fixing ring (53) is arranged on the first connecting tube (51), a plurality of guide columns (55) are arranged on the inner circumference of the second connecting tube (52), a guide channel is formed between the plurality of guide columns (55), and the ink outlet end (32) of the pen tip (3) passes through the guide channel and is slidably connected to the second connecting tube (52); The fixing mechanism (5) further comprises an elastic component (54), the elastic component (54) comprising a spring (541) and a sliding ring (542), the sliding ring (542) being slidably connected in the first connecting tube (51), and the sliding ring (542) being located between the connecting ring (2) and the first fixing ring (53), the spring (541) being arranged in the first connecting tube (51), one end of the spring (541) being in contact with the connecting ring (2), and the other end of the spring (541) being in contact with the sliding ring (542), and the ink immersion end (31) of the pen tip (3) passing through the sliding ring (542) and the spring (541) being arranged in the ink outlet hole (41); A sealing ring (6) is also provided on the first fixing ring (53), and one end of the second connecting tube (52) provided with an external thread abuts against the sealing ring (6); When the pen tip (3) is pressed downward, the pen tip (3) is retracted into the second connecting tube (52), and the ink-immersing end (31) of the pen tip (3) is subjected to sliding friction with the diaphragm (4), so that the ink-immersing end (31) of the pen tip (3) penetrates into the pen tube (1) and contacts the dye ink; When the pen tip (3) stops being pressed, the rounded corner (33) coated with the isolation layer contacts the diaphragm (4), thereby blocking the ink outlet hole (41) on the diaphragm (4).

2. The acrylic plastic marker according to claim 1, characterized in that: A conical cap (7) is provided at one end of the second connecting tube (52) away from the first fixing ring (53).

3. The acrylic plastic marker pen according to claim 2, characterized in that: An ink collecting cylinder (8) is arranged in the first connecting cylinder (51), a guide hole (9) is provided in the ink collecting cylinder (8), the diameter of the guide hole (9) at the end away from the diaphragm (4) is larger than the diameter at the end close to the diaphragm (4), and the end of the ink collecting cylinder (8) close to the diaphragm (4) is arranged on the connecting ring (2).

4. The acrylic plastic marker pen according to claim 3, characterized in that: The end of the pen barrel (1) away from the pen tip (3) is threadedly connected to a pen cap (10), the pen cap (10) is flush with the pen barrel (1), the end of the pen barrel (1) away from the pen cap (10) is movably connected to a pen cover (11), and the end of the pen cover (11) close to the pen barrel (1) is movably connected between the pen barrel (1) and the first connecting barrel (51).

5. The acrylic plastic marker pen according to claim 4, characterized in that: A plurality of limiting posts (12) are arranged on the pen cap (10); a cap removal ring (13) is arranged at one end of the pen cap (11) away from the pen barrel (1); and a plurality of limiting plates (14) are arranged on the inner wall of the cap removal ring (13).

6. A process for producing an acrylic plastic marker pen as claimed in claim 5, characterized in that: The steps include: S1: using a mold to manufacture the shapes of a pen barrel (1), a pen cover (11), and a pen cap (10), wherein the connecting ring (2), the first connecting tube (51), and the ink collecting tube (8) are integrally formed; S2: bonding the diaphragm (4) to the connecting ring (2), and opening an ink outlet hole (41) on the diaphragm (4); S3: placing the spring (541) in the first connecting tube (51), and placing the sliding ring (542) in the first connecting tube (51) to contact the spring (541); after the spring (541) and the sliding ring (542) are placed, welding the first fixing ring (53) in the first connecting tube (51); S4: connecting the pen tip (3) through the guide channel to the second connecting tube (52), then threading the second connecting tube (52) to the first connecting tube (51), and covering the pen tip (3) with the pen cap (11) so as to be movably connected to the pen tube (1); S5: Ink is added to the pen barrel (1). After the ink is added, the pen cap (10) is threadedly connected to the end of the pen barrel (1) away from the pen cover (11).

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