Fluorescent pen with double pen points at one end

Abstract

The utility model discloses a nite writer pen with double pen points at one end, which comprises a pen shell, two pen points with porous structures and two ink storage tubes, ink with different colors is respectively stored in the two ink storage tubes, and the two ink storage tubes are arranged on the inner side of the pen shell side by side. The two pen points are arranged at the front end of the pen shell in a spaced mode and are movably connected and matched with the pen shell in the length direction of the pen shell, an elastic component is arranged between the two pen points and the pen shell, and a guide mechanism is further arranged between the two pen points and the pen shell. The guide mechanism can drive the two pen points to be close to each other and spliced together when the two pen points move towards the rear end of the pen shell, so that ink adsorbed on the two pen points can permeate and be mixed, and the guide mechanism can drive the two pen points to be separated when the two pen points move towards the front end of the pen shell. The nite writer pen with the two pen points at one end is simple in structure and convenient to operate, and lines written by the nite writer pen can present more than two colors.

Description

Technical Field

[0001] This utility model relates to a fluorescent pen with two tips at one end. Background Technology

[0002] Highlighters are common writing instruments. A traditional highlighter typically consists of a casing, a nib, and an ink reservoir. The nib is located at the front of the casing, while the ink reservoir is inside the casing and connected to the rear of the nib. When writing, the fluorescent ink in the reservoir is delivered through the porous nib and adheres to the paper, forming lines.

[0003] Chinese utility model patent application (CN102423980A) discloses a double-ended three-color highlighter pen. This pen features a foldable structure with highlighter tips at both ends, each connected to an ink reservoir containing different colored inks. When used individually, each end can write lines in two different colors. When the pen is folded, the two tips face the same direction, and the color from the first tip quickly mixes with the color from the second tip, thus producing a third color.

[0004] The aforementioned pen, when intended to write a third color line, requires folding the pen barrel so that the two nibs are aligned and facing the same direction. Both nibs are then used simultaneously on the paper, with their orientation corresponding to the writing direction. One nib must first create a first-color line on the paper, and then the other nib must be used to cover the first-color line with a second-color line on top of it, allowing the ink to blend and ultimately form the third-color line. Because folding the pen barrel and overlapping the two colors are necessary, the operation is cumbersome and requires a certain level of user skill. Furthermore, the pen only produces lines of a single color, resulting in a limited color range. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a simple and easy-to-use fluorescent pen with two tips at one end. The lines it writes can display two or more colors, especially the color effect of two different colors on both sides, a mixed color in the middle area, and a gradient color between the two sides and the middle area.

[0006] To achieve the above objectives, this utility model provides a fluorescent pen with two tips at one end, including a pen shell, two porous pen tips, and two ink reservoirs connected to the two pen tips for ink supply. The two ink reservoirs store ink of different colors respectively. The two ink reservoirs are arranged side by side inside the pen shell. The two pen tips are spaced apart at the front end of the pen shell and form a movable connection with the pen shell that can move along the length of the pen shell. The pressure when writing on the paper can simultaneously drive the two pen tips to move towards the rear end of the pen shell. An elastic member is provided between the two pen tips and the pen shell to drive the two pen tips to return to their original position towards the front end of the pen shell. A guide mechanism is also provided between the two pen tips and the pen shell. The guide mechanism can drive the two pen tips to move towards each other and join together while the two pen tips move towards the rear end of the pen shell, so that the ink adsorbed on the two pen tips can penetrate and mix with each other. It can also drive the two pen tips to separate while the two pen tips move towards the front end of the pen shell.

[0007] When the pen writes on the paper, the pressure from contact with the paper drives both pen tips to move backward simultaneously. As they move backward, the two pen tips come together and join. Because the two ink reservoirs continuously supply ink to the two pen tips during the writing process, the ink absorbed by the two pen tips diffuses and mixes as they join, forming mixed ink at the junction of the two pen tips. Therefore, the written lines will show that the two sides of the line are two colors of ink, while the middle area of ​​the line is a mixed ink formed by the two colors. Furthermore, due to the different degrees of ink diffusion, a gradient effect will also be produced at the junction of the middle area and the two sides of the line, allowing the written lines to display more than two colors.

[0008] In addition to the above methods of use, you can also change the angle of the pen and use one of the nibs to write on the paper, producing lines of a single color.

[0009] Furthermore, the pen casing has a receiving groove at its front end, and the pen casing includes an inner cavity for storing ink tubes. The bottom inner wall of the receiving groove has a connecting hole that communicates with the inner cavity. A water-guiding core passes through the connecting hole, and an ink supply connection is established between the pen tip and the ink tube through the water-guiding core. Two pen tip seats are movably arranged in the receiving groove, and two pen tips are respectively fixed to the two pen tip seats. The pen tips and pen tip seats can move synchronously. The guiding mechanism is arranged between the pen tip seats and the inner side wall of the receiving groove. The elastic member is arranged between the rear end of the pen tip seat and the bottom inner wall of the receiving groove. A limiting mechanism for restricting the front and rear movement range of the pen tip seats is arranged between the pen tip seats and the inner wall of the receiving groove.

[0010] When the pen tip moves backward under writing pressure, it causes the pen tip holder to move backward as well. After the writing pressure is released, the elastic component pushes the pen tip holder and pen tip forward to reset. During the forward and backward movement of the pen tip holder, a guide mechanism located between the pen tip holder and the inner wall of the receiving groove guides the two pen tip holders to move towards or away from each other, thereby achieving the joining or separation of the two pen tips. During the forward and backward movement of the pen tip and other components, a limiting mechanism restricts their range of motion, ensuring that the pen tip has sufficient support during writing and preventing the pen tip and other components from falling out of the front end of the receiving groove.

[0011] Furthermore, the pen tip includes a writing section and a support section. The writing section is integrally formed at the front end of the support section. The front end of the pen tip holder is provided with an insertion hole. The support section of the pen tip is fixedly inserted into the insertion hole of the pen tip holder. The writing section of the pen tip protrudes from the front end of the insertion hole for writing. The rear end of the pen tip holder is provided with a through hole for the ink core to pass through. The ink core supplies ink to the support section of the pen tip located in the pen tip holder. The writing sections of both pen tips include a splicing part that protrudes laterally outward from the side of the pen tip holder. When the two pen tips come close together, the ink penetrates and cooperates through their splicing parts. In addition to widening the width of the writing lines, the laterally protruding splicing parts also help to improve the contact effect of the two pen tips and reduce the requirements for the lateral movement stroke of the pen tip holder.

[0012] Furthermore, the joint of the two pen tips has concave and convex parts that can fit together when brought together. The concave and convex parts preferably have concave arc and convex arc contours, respectively, which can improve the alignment and connection effect of the convex and concave parts. When the convex and concave parts fit together, they form a limiting fit between the two pen tips in a direction perpendicular to the approach direction, so that the two pen tips are in a relatively aligned state, improving the writing effect.

[0013] Furthermore, the pen tip includes a flat writing section, which comprises an arc-shaped first writing surface at the top of the writing section, an inclined and flat second writing surface on the wide surface of the writing section, and an inclined and flat third writing surface on the narrow surface of the writing section. When the first and second writing surfaces of the two pen tips are joined, they are aligned, while the third writing surfaces of the two pen tips are in opposite directions. When the pen is used at a relatively vertical angle, it contacts the paper through the first writing surface; when the pen is used at a relatively inclined angle, it contacts the paper through the second writing surface; and when only one pen tip is used to write on the paper, it contacts the paper through the third writing surface, thus improving the writing effect at different angles.

[0014] Furthermore, the guiding mechanism includes a first guide slope disposed on one opposite side of the two pen tip holders and a second guide slope disposed on the inner walls of the receiving groove on both sides corresponding to the distribution direction of the two pen tip holders. The first guide slope and the second guide slope are in a guiding contact engagement. When the two pen tip holders move backward, the two pen tip holders are driven to move toward each other by the guiding engagement between the first guide slope of the two pen tip holders and the second guide slope on the inner walls of both sides of the receiving groove.

[0015] Furthermore, the guiding mechanism includes guide blocks disposed on two inner sidewalls of the receiving groove perpendicular to the distribution direction of the two pen tip holders, and third guide ramps disposed on corresponding sides of the two pen tip holders. The lower ends of the guide blocks have fourth guide ramps on both sides that engage with the third guide ramps. When the two pen tip holders are driven forward by the elastic member, the guiding engagement between the third guide ramps of the two pen tip holders and the two fourth guide ramps of the guide blocks drives the two pen tip holders to move in opposite directions.

[0016] Furthermore, the elastic component is a spring, and a baffle is movably disposed in the receiving groove. The baffle abuts against the rear ends of the two pen tip holders, and the spring abuts between the baffle and the bottom inner wall of the receiving groove. The spring indirectly pushes the two pen tip holders forward through the baffle. The baffle is designed to allow the spring to evenly apply the elastic force to the two pen tip holders, thereby improving the synchronicity of the movement of the two pen tip holders. The baffle is provided with a through hole for the water guide core to pass through, thereby avoiding interference between the baffle and the water guide core.

[0017] In another preferred embodiment, the rear end of the integral structure formed by the two pen tip holders has a plug-in portion. The front end of the spring is fitted into the plug-in portion of the integral structure formed by the two pen tip holders. The rear end of the spring is abutted against the inner wall of the receiving groove. To improve the fitting effect between the spring and the plug-in portion, the plug-in portion preferably has an arc surface that contacts the inner side of the spring and a limiting portion for limiting the fitting depth of the spring. The arc surface and the limiting portion are evenly distributed on the two pen tip holders. The side wall of the receiving groove also preferably has an arc-shaped profile, which can improve the contact fit effect with the outer side of the spring and improve the positioning and deformation effect of the spring.

[0018] Furthermore, the limiting mechanism includes protrusions on the side of the pen tip holder and the inner wall of the receiving groove, which cooperate to limit the pen tip holder from falling forward out of the receiving groove. The limiting mechanism also includes a support column integrally formed on the bottom inner wall of the receiving groove. The front end of the support column and the two pen tip holders form a limiting cooperation. When a baffle is provided, the front end of the support column and the baffle form a limiting cooperation, and indirectly with the two pen tip holders through the baffle, thus preventing the two pen tip holders from moving backward excessively. It can also support the pen tip during writing.

[0019] Furthermore, the ink reservoir is a roll-wrapped core, which includes a cylindrical wrapping layer and fiber filaments filled within the wrapping layer. The roll-wrapped core is fixed within the inner cavity of the pen casing. The ink-drawing core is an integral structure, with its front end connected to the pen tip and its rear end movably inserted into the inner side of the wrapping layer. Since the ink-drawing core moves back and forth and laterally with the pen tip, this movable connection between the rear end of the ink-drawing core and the roll-wrapped core ensures effective connection and coordination between them, allowing the ink-drawing core to stably draw ink from the roll-wrapped core. Alternatively, the lateral movement can be achieved using the elasticity of the ink-drawing core itself; for example, the front end of the ink-drawing core can generate a lateral swing under the drive of the pen tip holder. The ink-drawing core and the pen tip can be integrally formed or separate components connected by an insertion method.

[0020] In another preferred embodiment, the ink-conducting core is a separate structure, comprising a front section and a rear section. The front section of the ink-conducting core is connected to the pen tip and moves synchronously with it, while the rear section is connected to the ink reservoir. The front and rear sections of the ink-conducting core can contact each other when the two pen tips are brought together. The rear section of the ink-conducting core supplies ink to the front section through this contact and can also separate when the two pen tips are separated, stopping ink supply to the pen tip and the front section of the ink-conducting core when the pen is not writing, thus helping to reduce the evaporation rate of ink in the ink reservoir. The front section of the ink-conducting core and the pen tip can be integrally formed or separate and connected by a plug-in method.

[0021] To improve ink delivery, the pen tip is preferably made of sintered polymer material. The ink core is preferably made of fiber material.

[0022] The beneficial effects of this utility model are as follows: Compared with the existing double-ended highlighter, the two pen tips are located at the same end of the pen. During use, there is no need to frequently reverse the pen tips or fold the pen. When a color mixing effect is desired, there is no need for additional steps to align the two pen tips in the writing direction. The pen's structure is simple, making writing more convenient. Furthermore, the written lines can display two or more colors, particularly achieving color effects where the two sides are two different colors, the middle area is a mixed color, or the two sides and the middle area are a gradient. The written lines have a better visual appeal and are more attractive to consumers. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first embodiment of the present utility model;

[0024] Figure 2 This is an exploded view of the structure of the first embodiment of the present invention;

[0025] Figure 3This is a partial cross-sectional view of the first embodiment of the present invention in its first usage state;

[0026] Figure 4 This is a partial cross-sectional view of the first embodiment of the present invention in a second usage state;

[0027] Figure 5 This is a schematic diagram of two pen tip holders and a pen tip according to the first embodiment of this utility model;

[0028] Figure 6 This is an exploded view of the structure of the two pen tip holders and the pen tip in the first embodiment of this utility model;

[0029] Figure 7 This is a schematic diagram of the internal structure of the movable groove in the first embodiment of this utility model;

[0030] Figure 8 This is a schematic diagram of the front end of the pen according to the first embodiment of the present invention;

[0031] Figure 9 This is a partial cross-sectional view of the second embodiment of the present invention;

[0032] Figure 10 This is a partial cross-sectional view of the third embodiment of the present invention in its first usage state;

[0033] Figure 11 This is a partial cross-sectional view of the third embodiment of the present invention in the second usage state. Detailed Implementation

[0034] A first embodiment of this utility model is a fluorescent pen with two tips at one end, for example... Figure 1-8 As shown: The pen includes a pen casing 1, two porous pen tips 2, and two ink reservoirs 3 connected to the two pen tips 2 for ink supply. The pen casing 1 is connected to a pen cap, which covers the pen tips 2 when not in use. The two ink reservoirs 3 store ink of different colors respectively and are arranged side by side inside the pen casing 1. The two pen tips 2 are spaced apart at the front end of the pen casing 1 and form a movable connection with the pen casing 1 that can move along the length of the pen casing 1. The pressure when writing on the paper can simultaneously drive the two pen tips 2 toward the pen casing 1. The pen tip 2 moves towards the rear end of the pen body. An elastic component 4 is provided between the two pen tips 2 and the pen body 1 to drive the two pen tips 2 to return to their original position towards the front end of the pen body 1. A guide mechanism is also provided between the two pen tips 2 and the pen body 1. The guide mechanism can drive the two pen tips 2 to move towards the rear end of the pen body 1 while moving towards the rear end of the pen body 1, so that the ink adsorbed on the two pen tips 2 can penetrate and mix with each other. It can also drive the two pen tips 2 to separate while moving towards the front end of the pen body 1.

[0035] The porous pen tip 2 utilizes capillary action to store and transfer ink. During writing, the pressure and friction generated by the pen tip 2 contacting the paper cause the ink to be evenly coated onto the paper surface through the porous structure of the pen tip 2, leaving writing. For example, the pen tip 2 can be made of fiber. To improve ink diffusion and mixing when two pen tips 2 are joined, the pen tip 2 is preferably made of sintered polymer material.

[0036] When the pen writes on the paper, the pressure from contact with the paper drives the two pen tips 2 to move backward simultaneously. As they move backward, the two pen tips 2 come together and join. During the writing process, the two ink reservoirs 3 continuously supply ink to the two pen tips 2. The ink absorbed on the two pen tips 2 diffuses and mixes as they join, forming mixed ink at the joint. As a result, the written lines will have two colors of ink on both sides and a mixed ink in the middle. Due to the different degrees of ink diffusion, a gradient effect will also be produced at the junction of the middle and side areas of the line, allowing the written lines to display more than two colors.

[0037] In addition to the above methods of use, one of the pen tips 2 can also be used individually to write on the paper by changing the angle of the pen, producing lines of a single color.

[0038] The pen casing 1 has a receiving groove 11 at its front end. The pen casing 1 includes an inner cavity 12 for storing ink tube 3. The bottom inner wall of the receiving groove 11 has a connecting hole 13 that communicates with the inner cavity 12. A water-guiding core 5 is movably inserted through the connecting hole 13. The pen tip 2 and the ink tube 3 are connected by the water-guiding core 5. Two pen tip seats 6 are movably arranged in the receiving groove 11. The two pen tips 2 are respectively fixed to the two pen tip seats 6. The pen tips 2 and the pen tip seats 6 can move synchronously. The guiding mechanism is arranged between the pen tip seats 6 and the inner wall of the receiving groove 11. The elastic member 4 is arranged between the rear end of the pen tip seats 6 and the bottom inner wall of the receiving groove 11. A limiting mechanism is arranged between the pen tip seats 6 and the inner wall of the receiving groove 11 to limit the range of motion of the pen tip seats 6.

[0039] When the pen tip 2 moves backward under writing pressure, it causes the pen tip holder 6 and the ink core 5 to move backward as well. After the writing pressure is released, the elastic component 4 can push the pen tip holder 6, pen tip 2, and ink core 5 to return to their original position. During the forward and backward movement of the pen tip holder 6, a guide mechanism located between the pen tip holder 6 and the inner wall of the receiving groove 11 guides the two pen tip holders 6 to move towards each other or away from each other, thereby realizing the two pen tips 2 coming together or separating. During the forward and backward movement of the pen tip 2 and other components, a limiting mechanism restricts their range of motion, ensuring that the pen tip 2 has sufficient support during writing and preventing the pen tip 2 and other components from coming off the front end of the receiving groove 11.

[0040] The pen tip 2 includes a writing part 21 and a support part 22. The writing part 21 is integrally formed at the front end of the support part 22. The front end of the pen tip holder 6 is provided with an insertion hole 61. The support part 22 of the pen tip 2 is fixedly inserted into the insertion hole 61 of the pen tip holder 6. Multiple ribs are provided on the inner side wall of the insertion hole 61 to improve the pressing and positioning effect on the support part 22 of the pen tip 2. The writing part 21 of the pen tip 2 protrudes from the front end of the insertion hole 61 for writing. The rear end of the pen tip holder 6 is provided with a through hole 6 for the ink core 5 to pass through. 2. Ink is supplied to the support part 22 of the pen tip 2 located in the pen tip holder 6 through the water core 5. The writing part 21 of both pen tips 2 includes a splicing part 210 that protrudes laterally outward from the side of the pen tip holder 6. When the two pen tips 2 come close together, the ink can penetrate and cooperate through their splicing part 210. In addition to widening the width of the writing line, the laterally protruding splicing part 210 also helps to improve the contact effect of the two pen tips 2 and reduce the requirements for the lateral movement stroke of the pen tip holder 6.

[0041] The splicing portion 210 of the two pen tips 2 has a concave portion 2101 and a convex portion 2102 that can fit together when brought together. The concave portion 2101 and the convex portion 2102 preferably have concave arc-shaped and convex arc-shaped contours, respectively, which can improve the alignment and connection effect of the convex portion 2102 and the concave portion 2101. When the convex portion 2102 and the concave portion 2101 fit together, they form a limiting fit between the two pen tips 2 in a direction perpendicular to the approach direction, so that the two pen tips 2 are in a relatively aligned state, thereby improving the writing effect.

[0042] The pen tip 2 includes a flat writing section 21. The writing section 21 includes an arc-shaped first writing surface 211 at the top, an inclined and flat second writing surface 212 on the wide surface of the writing section 21, and an inclined and flat third writing surface 213 on the narrow surface of the writing section 21. There are two second writing surfaces 212 adjacent to the two sides of the first writing surface 211. When the first and second writing surfaces 211 of the two pen tips 2 are joined, they are aligned. The third writing surfaces 213 of the two pen tips 2 are in opposite directions. When the pen is used at a relatively vertical angle, it contacts the paper through the first writing surface 211. When the pen is used at a relatively inclined angle, it contacts the paper through the second writing surface 212. When only one pen tip 2 is used to write on the paper, it contacts the paper through the third writing surface 213, thus improving the writing effect at different angles.

[0043] The guiding mechanism includes a first guide slope 63 disposed on one opposite side of the two pen tip holders 6, and a second guide slope 111 disposed on the inner walls of the receiving groove 11 on both sides corresponding to the distribution direction of the two pen tip holders 6. The first guide slope 63 and the second guide slope 111 are in a guiding contact engagement. When the two pen tip holders 6 move backward, the two pen tip holders 6 are driven to move toward each other by the guiding engagement between the first guide slope 63 of the two pen tip holders 6 and the second guide slope 111 on both sides of the inner walls of the receiving groove 11.

[0044] The guiding mechanism includes two guide blocks 112 disposed on two inner sidewalls of the receiving groove 11 perpendicular to the distribution direction of the two pen tip holders 6, and two third guide ramps 64 disposed on corresponding sides of the two pen tip holders 6. The two third guide ramps 64 of each pen tip holder 6 respectively engage with the third guide ramps 64 of the two guide blocks 112. The lower ends of the guide blocks 112 have fourth guide ramps 1120 that engage with the third guide ramps 64. When the two pen tip holders 6 are driven forward by the elastic member 4, the guiding engagement between the third guide ramps 64 of the two pen tip holders 6 and the two fourth guide ramps 1120 of the guide blocks 112 drives the two pen tip holders 6 to move in opposite directions.

[0045] The elastic component 4 is a spring. A baffle 7 is also movably arranged in the receiving groove 11. The baffle 7 abuts against the rear ends of the two pen tip holders 6. The spring abuts between the baffle 7 and the bottom inner wall of the receiving groove 11. The spring indirectly pushes the two pen tip holders 6 forward through the baffle 7. The baffle 7 is designed to allow the spring to evenly apply the elastic force to the two pen tip holders 6, thereby improving the synchronicity of the movement of the two pen tip holders 6. The baffle 7 is provided with a through hole 70 for the water guide core 5 to pass through, so as to avoid interference between the baffle 7 and the water guide core 5.

[0046] In the second embodiment, the baffle 7 may not be provided, such as... Figure 9 As shown, the rear end of the integral structure formed by the two pen tip holders 6 has a plug-in portion 60. The front end of the spring (i.e., the elastic member 4) is fitted with the plug-in portion 60 of the integral structure formed by the two pen tip holders 6. The rear end of the spring and the bottom inner wall of the receiving groove 11 are in abutment fit. In order to improve the fitting effect between the spring and the plug-in portion 60, the plug-in portion 60 preferably has an arc surface that contacts the inner side of the spring and a limiting portion for limiting the fitting depth of the spring. The arc surface and the limiting portion are evenly distributed on the two pen tip holders 6, which can improve the stability when connected to the spring and ensure the uniform force of the spring. The side wall of the receiving groove 11 is also preferably arc-shaped, which can improve the contact fit effect with the outer side of the spring and improve the positioning and deformation effect of the spring. Since there is no baffle 7, the number of parts is reduced and the structure of the product is simplified.

[0047] In the first embodiment, as Figure 5 , 6 As shown in Figure 7, the limiting mechanism includes a protrusion 81 disposed between the side of the pen tip holder 6 and the inner wall of the receiving groove 11. The protrusion 81 is a transverse ridge, and the two protrusions 81 cooperate to limit the pen tip holder 6 from falling forward out of the receiving groove 11. The limiting mechanism also includes a support column 82 integrally formed on the bottom inner wall of the receiving groove 11. The front end of the support column 82 and the two pen tip holders 6 form a limiting cooperation. When the baffle 7 is present, the front end of the support column 82 and the baffle 7 form a limiting cooperation, and indirectly form a limiting cooperation with the two pen tip holders 6 through the baffle 7, so as to prevent the two pen tip holders 6 from moving backward excessively, and can also support the pen tip 2 when writing.

[0048] The ink reservoir 3 is a roll-wrapped core, which includes a cylindrical wrapping layer and fiber filaments filled within the wrapping layer. The roll-wrapped core is fixed in the inner cavity 12 of the pen casing 1. The rear end of the ink-drawing core 5 is movably inserted into the inner side of the wrapping layer. Since the ink-drawing core 5 moves back and forth and laterally with the pen tip 2, this movable connection between the rear end of the ink-drawing core 5 and the roll-wrapped core ensures effective connection and cooperation between them, allowing the ink-drawing core 5 to stably draw ink from the roll-wrapped core. Alternatively, the lateral movement can be achieved using the elasticity of the ink-drawing core 5 itself; for example, the front end of the ink-drawing core 5 can generate a lateral swing under the drive of the pen tip holder 6 and the pen tip holder 6.

[0049] In the first embodiment, the water-guiding core 5 is an independent component, with its front end inserted and fixed to the pen tip 2. In the second embodiment, as shown... Figure 9 As shown, the water guide core 5 and the pen tip 2 can also be integrally formed. To improve the swinging effect at the front end of the water guide core 5, the through hole 70 and the connecting hole 13 are preferably oblong holes.

[0050] In the third embodiment, as Figure 10 , 11 As shown, the main difference from the first embodiment lies in the different structure of the water-guiding core 5. In the third embodiment, the water-guiding core 5 is a split structure, comprising a front section 51 and a rear section 52. The front section 51 of the water-guiding core 5 is connected to the pen tip 2 and moves synchronously with it. The rear section 52 of the water-guiding core 5 is connected to the ink reservoir 3. The structure of the ink reservoir 3 is the same as in the previous two embodiments. The front section 51 and the rear section 52 of the water-guiding core 5 can contact each other when the two pen tips 2 are brought together (e.g., ...). Figure 11 (As shown in the diagram), the rear section 52 of the ink core 5 supplies ink to the front section 51 through contact with the front section 51, and can also separate when the two pen tips 5 are separated (as shown in the diagram). Figure 10 (As shown in the figure) when the pen is not in the writing state, the ink supply to the pen tip 2 and the front section 51 of the ink reservoir 5 is stopped, which helps to reduce the evaporation rate of the ink in the ink reservoir 3. The front section 51 of the ink reservoir 5 and the pen tip 2 can be integrally molded as in the second embodiment, or they can be separate parts connected by a plug-in method as in the first embodiment.

[0051] The pen tip 2 is preferably made of sintered polymer material. During the sintering process, the polymer material, which consists of tiny particles, is heated, causing the particles to melt and solidify together. After sintering, the final pen tip 2 has a porous structure inside, resulting in a pen tip 2 with good ink delivery, particularly improving ink penetration and diffusion when two pen tips 2 come into contact. The ink core 5 is preferably made of fiber material.

[0052] In addition to the differences mentioned above, in the third embodiment, the limiting mechanism includes protrusions 81 respectively disposed on the opposite sides of the pen tip holder 6 and on the inner walls of the receiving groove 11 on both sides corresponding to the distribution direction of the two pen tip holders 6. The second guide slope 111 is formed on the front side of the protrusion 81 of the receiving groove 11. The rear side of the protrusion 81 of the receiving groove 11 and the front side of the protrusion 81 of the pen tip holder 6 both have planes 811 that can cooperate with the limiting. Compared with the limiting structure using convex ribs in the above embodiments, the limiting effect is better, and the pen tip holder 6 is less likely to fall out of the receiving groove 11.

[0053] Furthermore, the front end of the rear section 52 of the water-guiding core 5 has a relatively wide limiting portion 521, and the diameter of the connecting hole 13 is smaller than the width of the limiting portion 521, which can prevent the rear section 52 from moving backward due to the push of the front section 51. The front section 51 of the water-guiding core 5 has a relatively wide support portion 511, which can improve the connection effect with the through hole 62 and prevent the front section 51 from moving forward due to the push of the rear section 52.

[0054] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A highlighter with two porous tips at one end, comprising a pen shell, two porous tips, and two ink storage tubes connected to the two tips respectively, the two ink storage tubes storing different color inks respectively, characterized in that: Two ink storage tubes are arranged side by side in the inside of the pen shell, and two pen tips are arranged at intervals in the front end of the pen shell and are movably connected with the pen shell along the length direction of the pen shell. The pressure during writing on paper can drive the two pen tips to move towards the rear end of the pen shell at the same time. Elastic members are arranged between the two pen tips and the pen shell to drive the two pen tips to move towards the front end of the pen shell. A guide mechanism is further arranged between the two pen tips and the pen shell, which can drive the two pen tips to close to each other and splice together while the two pen tips move towards the rear end of the pen shell, so that the ink adsorbed on the two pen tips can permeate and mix with each other, and the two pen tips can be separated while the two pen tips move towards the front end of the pen shell.

2. The highlighter pen with dual tips at one end according to claim 1, characterized in that: The front end of the pen shell is provided with a containing groove, and the pen shell comprises an inner cavity for storing the ink storage tubes. The bottom inner wall of the containing groove is provided with a connecting hole communicating with the inner cavity, and a water guide core is arranged in the connecting hole. The pen tip and the ink storage tube are connected by the water guide core. Two pen tip seats are movably arranged in the containing groove, and the two pen tips are fixedly connected with the two pen tip seats respectively. The guide mechanism is arranged between the pen tip seats and the inner side wall of the containing groove. The elastic members are arranged between the rear end of the pen tip seat and the bottom inner wall of the containing groove. The inner wall of the containing groove and the pen tip seat are provided with a limiting mechanism for limiting the front and rear movement range of the pen tip seat.

3. The highlighter pen with dual tips at one end according to claim 2, wherein: The pen tip comprises a writing part and a supporting part. The writing part is integrally formed at the front end of the supporting part. The front end of the pen tip seat is provided with a socket. The supporting part of the pen tip is fixedly inserted into the socket of the pen tip seat. The writing part of the pen tip is exposed from the front end of the socket. The rear end of the pen tip seat is provided with a through hole for the water guide core. The writing parts of the two pen tips each comprise a splicing part protruding outwardly and transversely relative to the side of the pen tip seat. When the two pen tips close to each other, the splicing parts form a mutual permeation cooperation of ink.

4. The highlighter pen with dual tips at one end according to claim 3, wherein: The splicing parts of the two pen tips each have a concave part and a convex part which can be matched when the two pen tips close to each other. The convex part and the concave part form a limiting cooperation of the two pen tips in a direction perpendicular to the closing direction when matched.

5. The highlighter pen with dual tips at one end according to claim 4, wherein: The pen tip comprises a flat writing part. The writing part comprises an arc-shaped first writing surface at the top of the writing part, an inclined and flat second writing surface on the wide surface of the writing part, and an inclined and flat third writing surface on the narrow surface of the writing part. The first writing surface and the second writing surface of the writing part of the two pen tips are in an aligned position when spliced together. The third writing surfaces of the writing parts of the two pen tips are in a direction away from each other.

6. The highlighter pen with dual tips at one end according to claim 2, wherein: The guide mechanism comprises a first guide inclined surface arranged on the side away from each other of the two pen tip seats, and a second guide inclined surface arranged on the inner wall of the containing groove corresponding to the distribution direction of the two pen tip seats. The first guide inclined surface and the second guide inclined surface are in guiding contact.

7. The highlighter pen with dual tips at one end according to claim 6, wherein: The guide mechanism comprises a guide block arranged on the two inner side walls of the containing groove perpendicular to the distribution direction of the two pen tip seats, and a third guide inclined surface arranged on the corresponding side of the two pen tip seats. The lower ends of the guide block have fourth guide inclined surfaces in guiding contact with the third guide inclined surface.

8. The highlighter pen with dual tips at one end according to claim 2, wherein: The elastic member is a spring, a baffle is movably arranged in the accommodating groove, the baffle abuts against the rear ends of the two pen head seats, the spring abuts against the baffle and the bottom inner wall of the accommodating groove, the baffle is provided with a through hole for the water guide core to pass through, or the rear end of the integral structure formed by the two pen head seats is provided with a plug-in part, the front end of the spring is in sleeve joint with the plug-in part of the integral structure formed by the two pen head seats, and the rear end of the spring and the bottom inner wall of the accommodating groove are in abutting joint.

9. The highlighter pen with dual tips at one end according to claim 2, wherein: The limiting mechanism comprises protrusions arranged on the side of the pen head seat and the inner side wall of the accommodating groove, the limiting is realized through the cooperation of the protrusions of the two, and the pen head seat is prevented from being pulled out of the accommodating groove forwardly, the limiting mechanism further comprises a support column integrally formed at the bottom inner wall of the accommodating groove, and the front end of the support column is in limiting joint with the two pen head seats.

10. The highlighter pen with dual tips at one end according to claim 2, wherein: The ink storage tube is a coiled core, the coiled core comprises a cylindrical wrapping layer and fiber filaments filled in the wrapping layer, the coiled core is fixed in the inner cavity of the pen shell, the water guide core is an integral structure, the front end of the water guide core is connected with the pen head, and the rear end of the water guide core is movably plugged in the inner side of the wrapping layer, or the water guide core is a split structure, the water guide core comprises a front section and a rear section arranged in a split mode, the front section of the water guide core is connected with the pen head and moves synchronously with the pen head, the rear section of the water guide core is connected with the ink storage tube, and the front section and the rear section of the water guide core can be in contact when the two pen heads are close to each other and can be separated when the two pen heads are separated.

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