Straight-flow mark pen
By using the annular projection of the pen joint and the groove of the pen tip in the DC marker for clamping, and increasing the friction between the pen neck and the pen tip, the problem of easy swing and falling off of the pen tip is solved, and the smooth ink output effect of writing and painting is achieved.
Patent Information
- Application Number
- CN202421747335.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The existing DC marker pens are prone to swing and skewed and fall off due to the pen tip, resulting in poor writing and painting or no ink output.
By clamping between the first annular protrusion of the pen head and the annular groove of the pen head, the pen head is fixed to avoid up and down movement and falling off; at the same time, the second rib strip of the pen head and the annular groove of the pen head are used to cooperate with each other to increase friction and prevent the pen head from swinging left and right.
Effectively prevent the pen tip from falling off and swinging, ensure good contact between the pen tip and the ink-in core, and achieve smooth ink output in writing and painting.
Smart Images
Figure CN222793085U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stationery, in particular to a direct current marker pen. Background Art
[0002] Marker pen, also called marker pen. It is a kind of colored drawing pen used for writing or painting. It contains ink and is usually capped. It usually has hard and soft pen head and double head, one small head and one large head. DC marker pen is an important branch of marker pen.
[0003] The existing direct current marker pen has a pen tip that is easy to swing, tilt and fall off, and the pen tip has poor contact with the ink core, which will cause writing and drawing to be unsmooth or no ink. Utility Model Content
[0004] In view of this, the utility model provides a direct current marker pen, which utilizes the setting of the pen neck to prevent the pen head from swinging, tilting and falling off, so that the ink can flow smoothly during the writing and painting process.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A direct current marker pen comprises: a pen head, a pen neck, a water reservoir and a pen holder;
[0007] The pen tip comprises a nib portion, a clamping portion and an ink introducing portion, wherein the clamping portion is located between the nib portion and the ink introducing portion, and a peripheral wall of the clamping portion is provided with an annular groove;
[0008] The water reservoir comprises: a water reservoir body and an ink introducing core, wherein the water reservoir body is connected to the ink introducing portion through the ink introducing core;
[0009] The pen head comprises: an inner ring, an outer ring and a first rib; the inner ring is connected to the outer ring through the first rib, and the pen holder is sleeved on the outer peripheral wall of the inner ring;
[0010] The inner peripheral wall of the inner ring is provided with a first annular protrusion protruding toward the center line direction of the pen item;
[0011] The inner peripheral wall of the inner ring is sleeved with the annular groove, and the first annular protrusion is clamped in the annular groove;
[0012] The first annular protrusion is provided with a plurality of second ribs spaced apart in the circumferential direction and protruding toward the center line of the pen tip;
[0013] A surface of the second rib away from the first annular protrusion is in contact with the peripheral wall of the annular groove.
[0014] Preferably, the rib first end surface of the second rib is flush with the protrusion first end surface of the first annular protrusion; the rib second end surface of the second rib is flush with the protrusion second end surface of the first annular protrusion.
[0015] Preferably, the shape of a surface of the second rib away from the first annular protrusion is an arc-shaped surface matching the peripheral wall of the annular groove.
[0016] Preferably, one end of the outer ring facing the water reservoir extends toward the water reservoir, and after the extension, a first circular groove penetrating the inner ring is formed between the inner peripheral walls of the outer ring;
[0017] The water reservoir further comprises: a second circular groove disposed in the middle portion of the top end of the water reservoir body and connected to the water reservoir body;
[0018] The second circular groove is clamped in the first circular groove;
[0019] The ink introducing core passes through the water storage body and is connected to the ink introducing portion located in the second circular groove.
[0020] Preferably, the ink introducing core can be poked into one end of the ink introducing portion connected to the ink introducing core.
[0021] Preferably, the axial length of the first circular groove is greater than the axial length of the second circular groove, so that a gap is formed between the end surface of the second circular groove and the surrounding portion of the water storage body, and the surrounding portion is provided with a notch extending and penetrating along the axial direction thereof;
[0022] The number of the first ribs is multiple;
[0023] A plurality of first ribs connect the inner ring and the outer ring to form a hollow structure between the inner ring and the outer ring;
[0024] One side of the hollow structure is connected to the notch through the gap, and the other side of the hollow structure extends outside the pen holder.
[0025] Preferably, the pen item is an integrally formed structure.
[0026] Preferably, it comprises: a pen cap;
[0027] The outer peripheral wall of the inner ring is provided with a second annular protrusion protruding in a direction away from the center line of the pen item, and the second annular protrusion is arranged in a corresponding position to the first annular protrusion;
[0028] The end surface of the pen shaft facing one end of the pen head is connected to the first end surface of the second annular protrusion, and the second end surface of the second annular protrusion overlaps the inner end surface of the pen cap.
[0029] Preferably, the water storage tank further comprises: a connecting rod and a baffle;
[0030] The bottom end of the water storage body is located in the ink tube, connected to the baffle through a connecting rod, and coaxially arranged with the connecting rod and the baffle.
[0031] Preferably, the water storage tank further comprises: a third rib;
[0032] One end of the third rib is connected to the edge of the bottom end of the water storage container, and the other end is connected to the edge of the baffle.
[0033] It can be seen from the above technical scheme that the utility model provides a DC marker pen, which utilizes the first annular protrusion of the pen neck and the annular groove of the pen tip to clamp the pen neck and the pen tip to fix the pen tip, prevent the pen tip from moving up and down, and prevent the pen tip from falling off during use. The second rib of the pen neck and the annular groove of the pen tip cooperate with each other to increase friction, enhance the clamping force, and prevent the pen tip from swinging left and right, causing the pen tip to tilt and affecting writing and drawing. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0035] Figure 1 A schematic diagram of the structure of the appearance of a DC marker pen provided in an embodiment of the utility model;
[0036] Figure 2 for Figure 1 A schematic diagram of a half section of
[0037] Figure 3 A schematic diagram of the structure of a pen section of a DC marker provided by an embodiment of the utility model;
[0038] Figure 4 The first cross-sectional view of the pen along its axial direction (along Figure 3 from a top-down perspective);
[0039] Figure 5 The second cross-sectional view of the pen along its axial direction (along Figure 3 from bottom-up perspective);
[0040] Figure 6 for Figure 2 A partial enlarged view of
[0041] Figure 7A structural diagram showing the specific coordination between the ink core and the pen tip;
[0042] Figure 8 A structural diagram showing the specific coordination of the surrounding parts and gaps;
[0043] Fig. 9 This is a half-section structural diagram of the water storage tank;
[0044] Fig.10 This is the axonometric structural diagram of the water tank.
[0045] Wherein, 1 is a pen tip, 11 is a pen tip, 12 is a clamping portion, 121 is an annular groove, and 13 is an ink-introducing portion;
[0046] 2 is the pen neck, 21 is the inner ring, 22 is the outer ring, 23 is the first rib, 24 is the first annular protrusion, 241 is the first end face of the protrusion, 242 is the second end face of the protrusion, 25 is the second rib, 251 is the first end face of the rib, 252 is the second end face of the rib, 26 is the first circular groove, 27 is the hollow structure, and 28 is the second annular protrusion;
[0047] 3 is a water reservoir, 31 is a water reservoir body, 32 is an ink guide core, 33 is a second circular groove, 34 is a middle part, 35 is a surrounding part, 351 is a notch, 36 is a gap, 37 is a connecting rod, 38 is a baffle, and 39 is a third rib;
[0048] 4 is the pen holder, 5 is the pen cap, 6 is the ink tube, and 7 is the steel ball. DETAILED DESCRIPTION
[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0050] The DC marker pen provided by the embodiment of the utility model is as follows: Figure 1-Figure 9 As shown, it includes: a pen head 1, a pen body 2, a water reservoir 3 and a pen body 4;
[0051] The pen tip 1 comprises a nib 11, a clamping portion 12 and an ink introducing portion 13, wherein the clamping portion 12 is located between the nib 11 and the ink introducing portion 13, and an annular groove 121 is provided on the peripheral wall of the clamping portion 12. Figure 6 As shown;
[0052] like Figure 6 The water reservoir 3 shown includes: a water reservoir body 31 and an ink introducing core 32, and the water reservoir body 31 is connected to the ink introducing portion 13 through the ink introducing core 32;
[0053] The pen tip 2 comprises: an inner ring 21, an outer ring 22 and a first rib 23; the inner ring 21 is connected to the outer ring 22 via the first rib 23, and the pen holder 4 is sleeved on the outer peripheral wall of the inner ring 21;
[0054] The inner peripheral wall of the inner ring 21 is provided with a first annular protrusion 24 protruding toward the center line direction of the pen neck 2;
[0055] The inner peripheral wall of the inner ring 21 is sleeved with an annular groove 121, and the first annular protrusion 24 is clamped in the annular groove 121;
[0056] The first annular protrusion 24 is provided with a plurality of second ribs 25 distributed at intervals along the circumferential direction and protruding toward the center line direction of the pen neck 2;
[0057] A surface of the second rib 25 away from the first annular protrusion 24 is in contact with the peripheral wall of the annular groove 121 .
[0058] In the above technical scheme, the first annular protrusion 24 of the pen neck 2 and the annular groove 121 of the nib 1 are used to clamp the pen neck 2 and the nib 1 to fix the nib 1, thereby preventing the nib from moving up and down and preventing the nib 1 from falling off during use, resulting in poor contact between the nib and the ink core; and the second rib 25 of the pen neck 2 and the annular groove 121 of the nib 1 cooperate with each other to increase friction and enhance the clamping force, thereby preventing the nib from swinging left and right, causing the nib to tilt and affecting writing and drawing.
[0059] Optimize the above technical solutions, such as Figure 3-Figure 5 As shown, the rib first end face 251 of the second rib 25 is flush with the protrusion first end face 241 of the first annular protrusion 24 ; the rib second end face 252 of the second rib 25 is flush with the protrusion second end face 242 of the first annular protrusion 24 .
[0060] In the above technical solution, the end surface of the second rib 25 is flush with the end surface of the annular protrusion 24, so that the fit between the nib 1 and the neck 2 is more compact, the structure is more stable, and the nib 1 is further prevented from swinging up and down or left and right.
[0061] Optimize the above technical solutions, such as Figure 6 As shown, the shape of the side of the second rib 25 away from the first annular protrusion 24 (ie, the side matching with the peripheral wall of the annular groove 121 ) is an arcuate surface matching with the peripheral wall of the annular groove 121 .
[0062] In the above technical solution, by setting the side of the second rib 25 away from the annular protrusion 24 as an arc surface, the friction is further increased, the clamping force is enhanced, and the pen tip is prevented from swinging left and right.
[0063] In this technical solution, if Figure 6As shown, one end of the outer ring 22 toward the water reservoir 3 extends toward the water reservoir 3, and after the extension, a first circular groove 26 penetrating the inner ring 21 is formed between the inner peripheral walls of the outer ring 22;
[0064] The water storage tank 3 further includes: a second circular groove 33 disposed in the middle portion 34 of the top of the water storage tank body 31 and connected to the water storage tank body 31 (ie, the second circular groove 33 and the water storage tank body 31 are connected);
[0065] The second circular groove 33 is snap-fitted into the first circular groove 26;
[0066] The ink introducing core 32 passes through the water storage body 31 and is connected to the ink introducing portion 13 located in the second circular groove 33 .
[0067] In the above technical solution, the first circular groove 26 and the second circular groove 33 are arranged to make the fit between the ink drawing core 32 and the ink drawing portion 13 of the DC marker pen more compact, thereby preventing the ink drawing core 32 and the ink drawing portion 13 from being disconnected during writing or painting, resulting in the nib 11 not discharging ink.
[0068] Optimize the above technical solutions, such as Figure 7 As shown, the ink introducing core 32 can be poked into one end of the ink introducing portion 13 connected to the ink introducing core 32 .
[0069] In the above technical solution, the end face of one end where the ink introducing portion 13 is connected to the ink introducing core 32 is flat, and the tip of the ink introducing core 32 pokes into the end face of the ink introducing portion 13, making the connection between the ink introducing portion 13 and the ink introducing core 32 more secure, and continuous writing and painting are smoother.
[0070] Optimize the above technical solutions, such as Figure 6 , Figure 8 and Fig. 9 As shown, the axial length of the first circular groove 26 is greater than the axial length of the second circular groove 33, so that a gap 36 is formed between the end surface of the second circular groove and the surrounding portion 35 of the water storage body 31, and the surrounding portion 35 is provided with a notch 351 extending and penetrating along the axial direction thereof, as shown in FIG. Fig.10 As shown;
[0071] The number of the first ribs 23 is multiple;
[0072] A plurality of first ribs 23 connect the inner ring 21 and the outer ring 22 to form a hollow structure 27 between the inner ring 21 and the outer ring 22;
[0073] One side of the hollow structure 27 is connected to the notch 351 through the gap 36 , and the other side of the hollow structure 27 extends to the outside of the pen holder 4 .
[0074] In the above technical solution, the internal air pressure in the water reservoir 3 and the atmospheric pressure outside the pen holder 4 are kept balanced by the arrangement of the gap 36, the notch 351 and the hollow structure; it should be noted that, in the circulation route of the return air channel, when the pressure of the gas in the water reservoir body 31 is greater than the atmospheric pressure, the gas in the water reservoir body 31 flows to the notch 351, then flows to the gap 36, through the hollow structure 27, and then flows to the outside of the pen holder 4; when the pressure of the gas in the water reservoir body 31 is less than the atmospheric pressure, the air outside the pen holder 4 flows to the hollow structure 27, through the gap 36, flows to the notch 351, and then flows into the water reservoir body 31. Preferably, the notch 351 may include a first notch and a second notch, and the surrounding portion 35 is formed by two menisci arranged relatively spaced apart, and the space formed between the relative spacing is the first notch and the second notch.
[0075] In this technical solution, if Figure 3 As shown, the pen tip 2 is an integrally formed structure.
[0076] In the above technical solution, the pen section 2 is an integrally formed structure, which makes the clamping structure between the pen tip 1 and the pen section 2 more stable. It should be noted that the pen tip 1 has a certain elasticity, and the elasticity of the pen tip 1 is used to clamp the pen tip 1 in the pen section 2.
[0077] In some embodiments, the pen tip 2 is separately provided (divided into a first semicircular portion and a second semicircular portion), and can be quickly assembled with the pen tip 1. The first semicircular portion and the second semicircular portion can be assembled into the pen tip 2 by snapping, or the first semicircular portion and the second semicircular portion can be glued into the pen tip 2 using their contact surfaces.
[0078] In this technical solution, if Figure 6 As shown, it also includes: a pen cap 5;
[0079] The outer peripheral wall of the inner ring 21 is provided with a second annular protrusion 28 protruding away from the center line of the pen tip 2, and the second annular protrusion 28 and the first annular protrusion 24 are arranged in a corresponding position;
[0080] The end surface of the pen body 4 facing the pen tip 1 is connected to the first end surface of the second annular protrusion 28 , and the second end surface of the second annular protrusion 28 overlaps the inner end surface of the pen cap 5 .
[0081] In the above technical solution, by providing the second annular protrusion 28 of the inner ring 21 , the inner ring 21 can be fixed to the pen barrel 4 and the pen cap 5 at the same time.
[0082] In this technical solution, if Fig. 9 As shown, the water storage tank 3 further includes: a connecting rod 37 and a baffle 38, and the baffle 38 has a through hole to facilitate the ink to enter the ink introduction core 32;
[0083] The bottom end of the water reservoir body 31 is located in the ink tube 6 , and is connected to the baffle 38 via a connecting rod 37 , and is coaxially arranged with the connecting rod 37 and the baffle 38 .
[0084] In the above technical solution, since the ink tube 6 is provided with a steel ball, the baffle 38 can effectively prevent the steel ball from hitting the ink guide core when shaking.
[0085] In order to further optimize the above technical solution, Fig. 9 As shown, the water storage tank 3 further includes: a third rib 39;
[0086] One end of the third rib 39 is connected to the edge of the bottom end of the water storage container 3 , and the other end is connected to the edge of the baffle 38 .
[0087] In the above technical solution, the third ribs 39 are provided to make the structure between the water storage tank and the baffle 38 more stable. In addition, the cross-section of the baffle 38 is elliptical.
[0088] In the above technical solution, the first rib 23, the second rib 25 and the third rib 39 are all reinforcing ribs, and the first rib 23, the second rib 25 and the third rib 39 are convex ribs.
[0089] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be combined with each other arbitrarily, as long as the combined technical features are not contradictory. All feasible feature combinations are technical contents clearly recorded in this article. Any of the multiple sub-features contained in the same sentence can be applied independently, and does not have to be applied together with other sub-features.
[0090] The present invention is further described below in conjunction with specific embodiments:
[0091] The technical scheme adopted by the utility model is as follows: the nib 1 is designed to be an I-shape, a plurality of vertical fixing ribs (i.e., the second ribs 25) are arranged on the inner wall of the pen neck 2 to clamp the nib 1, and the lower end of the nib 1 extends into the inner hole of the water reservoir 3 to connect the ink introducing core 32, so that the nib 1 is fixed and does not swing, the machine assembly is smoother, the production efficiency is improved, and the nib 1 is more effectively prevented from falling off, swinging crookedly, and insufficient sliding force; the design that the ink introducing core 32 can be inserted into the nib 1 makes the two contact more closely, and solves the problem of poor ink discharge or no ink discharge caused by poor contact between the nib 1 and the ink introducing core 32; reinforcing ribs and a limiting baffle (i.e., the baffle 38) are designed at the end of the water reservoir, the reinforcing ribs (i.e., the third rib 33) prevent the baffle from being damaged by external force during the assembly process, the limiting baffle prevents the ink introducing core 32 from retreating and prevents the impact force of the steel ball from damaging the ink introducing core 32, and the pen neck 2 is designed with an air return setting to solve the ink leakage phenomenon of the product.
[0092] This design mainly consists of a nib 1, a pen section 2, a water reservoir 3, a pen body 4, a pen cap 5, an ink tube 6 and a steel ball 7; the nib 1 is wide at the top and bottom and narrow in the middle, and the upper end is inclined, which is convenient for inserting the pen section 2 to complete the machine assembly, increasing the production capacity and quality stability. Reinforcement ribs are set at the position of the pen section 2, and the reinforcement ribs in the middle part increase friction, enhance the clamping force, and prevent falling off. The reinforcement ribs can prevent the nib 1 from moving up and down. The reinforcement ribs in the upper part are used for the installation and tightening of the nib 1, increasing friction and preventing it from falling. The ink core 32 inside the water reservoir 3 is directly inserted into the inside of the nib 1, and a baffle 38 is designed at the end of the water reservoir, which can effectively prevent the steel ball 7 from damaging the ink core 32 when shaking. The reinforcement ribs at the end of the water reservoir 3 play a supporting role for the baffle 38, reducing the overall weight, and there are through holes on the baffle 38 to facilitate ink to enter the ink core 32. There is pressure inside the pen barrel 4, and the pressure passes through the water reservoir 3 to the pen neck 2. The pen neck is hollowed out to increase the exhaust volume and avoid ink leakage. A steel ball 7 is placed in the inner cavity of the pen barrel 4. When ink precipitates, it can be shaken to quickly stir the ink to make it uniform.
[0093] The beneficial effects of the utility model are as follows: the improvement of the pen tip and the pen neck enhances the fastening force of the pen tip, and the pen tip will not fall off or swing crooked when subjected to external force. The ink core is inserted into the pen tip to make it firmly in contact, and continuous writing and drawing are smoother. After the water reservoir is added with reinforcing ribs and positioning baffles, it can prevent the ink core from sliding and shrinking after being subjected to external force, resulting in poor contact of the pen tip and causing poor writing; steel balls are added to the pen barrel to prevent ink precipitation, making the ink color more uniform when painting, and the water reservoir baffle can effectively prevent the steel balls from hitting the ink core when shaking. The hollow design of the pen neck increases the exhaust volume and prevents ink leakage from the product; the pen tip and the ink core are firmly fixed and not easy to fall off or tilt, so writing and drawing are smooth and the color is uniform. After the pen cap is pulled out, there is no ink dripping from the pen tip.
[0094] The key points are the "I"-shaped design of the nib and the reinforcement ribs of the pen neck, the fastening design of the nib, the coordination between the nib and the ink core, the hollow porous design of the pen neck, and the baffle design of the water reservoir; the protection points include: the "I"-shaped design of the nib; the design of the horizontal and vertical fastening ribs of the pen neck; the nib is fastened at two points of the pen neck and the water reservoir; the hollow venting design of the pen neck; and the design of the ink core poking into the nib.
[0095] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0096] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A DC marker pen, characterized in that: include: A pen head (1), a pen neck (2), a water reservoir (3) and a pen holder (4); The pen tip (1) comprises a nib portion (11), a clamping portion (12) and an ink introduction portion (13), wherein the clamping portion (12) is located between the nib portion (11) and the ink introduction portion (13), and an annular groove (121) is provided on a peripheral wall of the clamping portion (12); The water reservoir (3) comprises: a water reservoir body (31) and an ink introduction core (32), and the water reservoir body (31) is connected to the ink introduction portion (13) via the ink introduction core (32); The pen tip (2) comprises: an inner ring (21), an outer ring (22) and a first rib (23); the inner ring (21) is connected to the outer ring (22) via the first rib (23), and the pen holder (4) is sleeved on the outer peripheral wall of the inner ring (21); The inner peripheral wall of the inner ring (21) is provided with a first annular protrusion (24) protruding toward the center line direction of the pen neck (2); The inner peripheral wall of the inner ring (21) is sleeved with the annular groove (121), and the first annular protrusion (24) is clamped in the annular groove (121); The first annular protrusion (24) is provided with a plurality of second ribs (25) which are distributed at intervals along the circumferential direction and protrude toward the center line direction of the pen tip (2); A surface of the second rib (25) away from the first annular protrusion (24) is in contact with the peripheral wall of the annular groove (121).
2. The direct current marker pen according to claim 1, characterized in that: The rib first end surface (251) of the second rib (25) is flush with the protrusion first end surface (241) of the first annular protrusion (24); the rib second end surface (252) of the second rib (25) is flush with the protrusion second end surface (242) of the first annular protrusion (24).
3. The direct current marker pen according to claim 1, characterized in that: The shape of a surface of the second rib (25) away from the first annular protrusion (24) is an arc-shaped surface that matches the peripheral wall of the annular groove (121).
4. The direct current marker pen according to claim 1, characterized in that: One end of the outer ring (22) is extended toward the water reservoir (3), and after the extension, a first circular groove (26) penetrating the inner ring (21) is formed between the inner peripheral wall of the outer ring (22); The water storage container (3) further comprises: a second circular groove (33) arranged in the middle part (34) of the top end of the water storage container body (31) and connected with the water storage container body (31); The second circular groove (33) is snap-fitted into the first circular groove (26); The ink introduction core (32) passes through the water storage container body (31) and is connected to the ink introduction portion (13) located in the second circular groove (33).
5. The direct current marker pen according to claim 4, characterized in that: The ink introducing core (32) can be inserted into one end of the ink introducing portion (13) connected to the ink introducing core (32).
6. The direct current marker pen according to claim 4, characterized in that: The axial length of the first circular groove (26) is greater than the axial length of the second circular groove (33), so that a gap (36) is formed between the end surface of the second circular groove and the surrounding portion (35) of the water storage container body (31), and the surrounding portion (35) is provided with a notch (351) extending along the axial direction and penetrating therethrough; The number of the first ribs (23) is multiple; A plurality of first ribs (23) connect the inner ring (21) and the outer ring (22) so as to form a hollow structure (27) between the inner ring (21) and the outer ring (22); One side of the hollow structure (27) is connected to the notch (351) through the gap (36), and the other side of the hollow structure (27) extends to the outside of the pen holder (4).
7. The direct current marker pen according to claim 1, characterized in that: The pen tip (2) is an integrally formed structure.
8. The direct current marker pen according to claim 1, characterized in that: Also includes: Pen cap (5); The outer peripheral wall of the inner ring (21) is provided with a second annular protrusion (28) protruding in a direction away from the center line of the pen tip (2), and the second annular protrusion (28) and the first annular protrusion (24) are arranged in a corresponding position; The end surface of the pen body (4) facing the pen tip (1) is connected to the first end surface of the second annular protrusion (28), and the second end surface of the second annular protrusion (28) overlaps the inner end surface of the pen cap (5).
9. The direct current marker pen according to any one of claims 1 to 8, characterized in that: The water storage container (3) further comprises: a connecting rod (37) and a baffle (38); The bottom end of the water storage body (31) is located in the ink tube (6), is connected to the baffle (38) via a connecting rod (37), and is coaxially arranged with the connecting rod (37) and the baffle (38).
10. The direct current marker pen according to claim 9, characterized in that: The water storage container (3) further comprises: a third rib (39); One end of the third rib (39) is connected to the edge of the bottom end of the water storage container (3), and the other end is connected to the edge of the baffle (38).