Double-nib highlighter

Abstract

The invention discloses a double-nib nite writer pen which comprises a pen shell, two nibs of porous structures and two ink storage tubes, ink of different colors is stored in the two ink storage tubes respectively, 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 double-nib nite writer pen is simple in structure and convenient to operate, and lines written by the double-nib nite writer pen can present more than two colors.

Description

Technical Field

[0001] The invention relates to a double-nib fluorescent pen. Background Art

[0002] Fluorescent pens are common writing tools. A fluorescent pen of a conventional structure generally includes a pen housing, a pen head, and an ink storage tube. The pen head is disposed at the front end of the pen housing, and the ink storage tube is disposed inside the pen housing and connected to the rear end of the pen head. When writing, the fluorescent ink in the ink storage tube is transported through the porous pen head and adheres to the paper surface, forming a line.

[0003] The Chinese invention patent application discloses a double-headed three-color fluorescent pen (CN102423980A), which adopts a foldable structure, has fluorescent pen tips at both ends, and is respectively connected to ink storage tubes storing inks of different colors. When the two ends of the pen are used separately, two different color lines can be written. After the pen holder is folded, the two pen tips face in the same direction, and when drawing a line, the color of the previous pen tip quickly mixes with the color of the next pen tip, so a third color can be written.

[0004] With the above-mentioned pen with existing structure, when one wants to write lines of a third color, the pen holder needs to be folded so that the two pen tips are flush and face in one direction, and then the two pen tips are used to write on the paper at the same time. When writing, the arrangement direction of the two pen tips corresponds to the writing direction. One of the pen tips needs to be used to form a line of the first color on the paper first, and then the other pen tip needs to be used to cover the line of the second color on top of the line of the first color, so that the ink of the two lines can be merged to finally form a line of the third color. Since the pen holder needs to be folded when writing, and the lines of the two colors need to be overlapped, the operation is cumbersome and has certain requirements on the user's operating level. In addition, the lines written by the pen only contain a single color, and the color is relatively single. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a double-nib fluorescent pen with a simple structure and easy operation. The written lines can present more than two colors, and in particular can present a color effect in which the two side areas are two different colors, the middle area is a mixed color, and the two side areas and the middle area are gradient colors.

[0006] To achieve the above-mentioned purpose, the present invention provides a double-pen-tip fluorescent pen, comprising a pen shell, two pen tips with a porous structure, and two ink storage tubes connected to the two pen tips for ink supply, wherein the two ink storage tubes respectively store inks of different colors, the pen shell is connected to a pen cap, the two ink storage tubes are arranged side by side on the inner side of the pen shell, the two pen tips are arranged at a distance at the front end of the pen shell and form a movable connection with the pen shell that can move along the length direction of the pen shell, the two pen tips can be driven to move toward the rear end direction of the pen shell at the same time by using the pressure when writing on paper, an elastic member for driving the two pen tips to reset toward the front end direction of the pen shell is arranged between the two pen tips and the pen shell, and a guiding mechanism is also arranged between the two pen tips and the pen shell, the guiding mechanism can drive the two pen tips to move toward each other and splice together while the two pen tips move toward the rear end direction of the pen shell, so that the inks adsorbed on the two pen tips can penetrate and mix with each other, and can also drive the two pen tips to separate while the two pen tips move toward the front end direction of the pen shell.

[0007] When the pen writes on paper, the pressure when in contact with the paper is used to drive the two pen tips to move backward at the same time. The two pen tips move closer to each other and splice together while moving backward. Since the two ink storage tubes continuously supply ink to the two pen tips during the writing process, the ink adsorbed on the two pen tips will diffuse and mix as the two pen tips are spliced ​​together, forming mixed color ink at the splicing of the two pen tips. Therefore, the written lines will appear: the two side areas of the line are two colors of ink, and the middle area of ​​the line is mixed color ink formed by the mixture of the two inks. Moreover, due to the different degrees of ink diffusion, a gradient color effect will be produced at the junction of the middle area and the two side areas of the line, so that the written lines can show more than two colors.

[0008] In addition to the above-mentioned usage, you can also use one of the pen tips to write on paper by changing the angle of the pen to write lines of a single color.

[0009] Furthermore, a accommodating groove is provided at the front end of the pen case, and the pen case includes an inner cavity for storing an ink storage tube. A connecting hole communicating with the inner cavity is provided on the bottom inner wall of the accommodating groove, and a water guide core is passed through the connecting hole. An ink supply connection is established between the pen tip and the ink storage tube via the water guide core. Two nib seats are movably provided in the accommodating groove, and the two nib seats are respectively fixed with the two nib seats, so that the nib and the nib seat can move synchronously. The guiding mechanism is provided between the nib seat and the inner side wall of the accommodating groove, and the elastic member is provided between the rear end of the nib seat and the bottom inner wall of the accommodating groove. A limiting mechanism for limiting the forward and backward movable range of the nib seat is provided between the nib seat and the inner wall of the accommodating groove.

[0010] When the pen tip is driven to move backward by writing pressure, it will drive the pen tip seat to move backward. After the writing pressure is released, the elastic member can push the pen tip seat and the pen tip to return forward. During the forward and backward movement of the pen tip seat, the guide mechanism provided between the pen tip seat and the inner side wall of the accommodating groove guides the two pen tip seats to move toward or away from each other, thereby achieving the close splicing or separation of the two pen tips. During the forward and backward movement of the pen tip and other components, the limiting mechanism is used to limit their forward and backward range of movement, ensuring that the pen tip has sufficient support force when writing, and also preventing the pen tip and other components from falling out of the front end of the accommodating groove.

[0011] Furthermore, the nib comprises a writing part and a supporting part, the writing part is integrally formed at the front end of the supporting part, a socket is provided at the front end of the nib seat, the supporting part of the nib is fixedly inserted in the socket of the nib seat, the writing part of the nib is exposed from the front end of the socket for writing, and a through hole for a water guide core to pass through is provided at the rear end of the nib seat, ink is supplied to the supporting part of the nib located in the nib seat through the water guide core, the writing parts of the two nibs both comprise a splicing part protruding laterally outward relative to the side of the nib seat, and the two nibs form mutual penetration and cooperation of ink through their splicing parts when they are close to each other, and the laterally protruding splicing part is not only conducive to widening the width of the writing line, but also conducive to improving the contact effect of the two nibs and reducing the requirements for the lateral movement stroke of the nib seat.

[0012] Furthermore, the joint parts of the two pen tips respectively have a concave part and a convex part that can match when they are brought together. The concave part and the convex part preferably have a concave arc-shaped and a convex arc-shaped contour, respectively, which can improve the alignment connection effect of the convex part and the concave part. When the convex part and the concave part match, the two pen tips form a limited fit in a direction perpendicular to the direction of bringing together, so that the two pen tips are in a relatively aligned state, thereby improving the writing effect.

[0013] Furthermore, the pen tip includes a flat writing part, the writing part includes an arc-shaped first writing surface located at the top of the writing part, an inclined and flat second writing surface located on the wide surface of the writing part, and an inclined and flat third writing surface located 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 a relatively aligned position when they are assembled, and the third writing surfaces of the writing parts of the two pen tips are in opposite directions. When the pen tool writes at a relatively vertical angle, it contacts the paper surface through the first writing surface, when the pen tool writes at a relatively inclined angle, it contacts the paper surface through the second writing surface, and when the pen tool uses one of the pen tips alone to write on the paper, it contacts the paper surface through the third writing surface, thereby improving the writing effect at different angles.

[0014] Furthermore, the guiding mechanism includes a first guiding bevel arranged on the opposite side of the two pen tip holders, and a second guiding bevel arranged on the inner walls on both sides of the accommodating groove corresponding to the distribution direction of the two pen tip holders. The first guiding bevel and the second guiding bevel are in guiding contact and cooperation. When the two pen tip holders move backward, the two pen tip holders are driven to move in a direction closer to each other through the guiding cooperation between the first guiding bevels of the two pen tip holders and the second guiding bevels on the inner walls on both sides of the accommodating groove.

[0015] Furthermore, the guide mechanism includes guide blocks arranged at two inner side walls of the accommodating groove perpendicular to the distribution direction of the two pen tip seats, third guide slopes arranged at the corresponding sides of the two pen tip seats, and fourth guide slopes on both sides of the lower end of the guide block for guiding contact and cooperation with the third guide slopes. When the two pen tip seats are driven forward by the elastic member, the two pen tip seats are driven to move in a direction away from each other through the guiding cooperation between the third guide slopes of the two pen tip seats and the two fourth guide slopes of the guide block.

[0016] Furthermore, the elastic component is a spring, and a baffle is movably provided in the accommodating groove, the baffle is abutted against the rear ends of the two pen tip seats, the spring is abutted against the baffle and the bottom inner wall of the accommodating groove, the spring indirectly pushes the two pen tip seats forward through the baffle, the baffle is provided so that the spring can evenly apply elastic force to the two pen tip seats respectively, thereby improving the synchronization of the movement of the two pen tip seats, and 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, a plug-in portion is formed at the rear end of the overall structure formed by the two pen tip seats, the front end of the spring and the plug-in portion of the overall structure formed by the two pen tip seats form a socket fit, and the rear end of the spring and the bottom inner wall of the accommodating groove form a butt fit. In order to improve the socketing effect of the spring and the plug-in portion, the plug-in portion preferably has an arc surface that contacts and cooperates with the inner side of the spring and a limiting portion for limiting the socketing depth of the spring. The arc surface and the limiting portion are evenly distributed on the two pen tip seats, and the side wall of the accommodating groove also preferably has an arc-shaped profile, which can improve the contact and matching effect with the outer side of the spring and improve the positioning and deformation effects of the spring.

[0018] Furthermore, the limiting mechanism includes protrusions arranged on the side of the pen tip holder and the inner wall of the accommodating groove, and the protrusions of the two cooperate to limit the position to prevent the pen tip holder from slipping forward from the accommodating groove; the limiting mechanism also includes a support column integrally formed at the bottom inner wall of the accommodating groove, and the front end of the support column and the two pen tip holders form a limiting cooperation. In the case of a baffle, the front end of the support column and the baffle form a limiting cooperation, and indirectly form a limiting cooperation with the two pen tip holders through the baffle, thereby avoiding excessive backward movement of the two pen tip holders, and can also play a supporting role for the pen tip when writing.

[0019] Furthermore, the ink storage tube is a roll core, which includes a cylindrical wrapping layer and fiber filaments filled in the wrapping layer. The roll core is fixed in the inner cavity of the pen shell. The water-inducing core is an integrated structure. The front end of the water-inducing core is connected to the pen tip, and the rear end of the water-inducing core is movably plugged into the inner side of the wrapping layer. Since the water-inducing core will follow the front and rear and lateral movement of the pen tip, the rear end of the water-inducing core and the roll core adopt this movably connected mode to ensure the effective connection and coordination between the water-inducing core and the roll core, so that the water-inducing core can stably obtain ink from the roll core. In addition, the elasticity of the water-inducing core itself can also be used to achieve lateral movement. For example, the front end of the water-inducing core can generate lateral swing under the drive of the pen tip holder and the pen tip holder. The water-inducing core and the pen tip can be integrally formed, or they can be separated and connected by plugging.

[0020] In another preferred embodiment, the water-introducing core is a split structure, and the water-introducing core includes a front section and a rear section which are separately arranged. The front section of the water-introducing core is connected to the pen tip and moves synchronously with the pen tip, and the rear section of the water-introducing core is connected to the ink storage tube. The front section and the rear section of the water-introducing core can contact when the two pen tips are close together and spliced, and the rear section of the water-introducing core can transport ink to the front section through contact, and can also separate when the two pen tips are separated, so that the pen tip and the front section of the water-introducing core stop supplying ink when the pen is not in the writing state, which helps to reduce the volatilization rate of the ink in the ink storage tube. The front section of the water-introducing core and the pen tip can be integrally formed, or they can be split and connected by plugging.

[0021] In order to improve the ink delivery effect, the pen head is preferably made of sintered polymer material. The water-introducing core is preferably made of fiber material.

[0022] The beneficial effects of the present invention are as follows: compared with the double-headed fluorescent pen in the prior art, the two pen tips of the present invention are located at the same end of the pen, and there is no need to frequently invert the pen tips during use, nor is there any need to fold the pen, and when a mixed color effect is desired, no additional operation is required to align the two pen tips in the writing direction, the pen has a simple structure, and the writing operation is more convenient, and the written lines can present more than two colors, and in particular can present a color effect in which the two side areas are two different colors, the middle area is mixed color, and the two side areas and the middle area are gradient colors, the written lines have a better appearance, and are more attractive to consumers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a first embodiment of the present invention; Figure 2 It is a schematic diagram of the structural decomposition of the first embodiment of the present invention; Figure 3 A partial cross-sectional view of the first embodiment of the present invention in a first use state; Figure 4 A partial cross-sectional view of the first embodiment of the present invention in a second use state; Figure 5 It is a schematic diagram of two pen tip holders and pen tips according to the first embodiment of the present invention; Figure 6 This is a structural exploded view of two pen tip holders and pen tips according to the first embodiment of the present invention; Figure 7 This is a schematic diagram of the internal structure of the movable groove of the first embodiment of the present invention; Figure 8 A schematic diagram of the front end of a pen according to a first embodiment of the present invention; Fig. 9 is a partial cross-sectional view of a second embodiment of the present invention; Fig.10 A partial cross-sectional view of the third embodiment of the present invention in a first use state; Fig.11 It is a partial cross-sectional view of the third embodiment of the present invention in the second usage state. DETAILED DESCRIPTION

[0024] The first embodiment of the double-pen-tip fluorescent pen of the present invention is as follows Figure 1-8 As shown, the pen shell 1 includes two pen tips 2 with a porous structure, and two ink storage tubes 3 connected to the two pen tips 2 for ink delivery. The pen shell 1 is connected to a pen cap, and the pen tips 2 are covered by the pen cap when not in use. The two ink storage tubes 3 store inks of different colors respectively. The two ink storage tubes 3 are arranged side by side inside the pen shell 1. The two pen tips 2 are arranged at intervals at the front end of the pen shell 1 and form an active connection with the pen shell 1 that can move along the length direction of the pen shell 1. The pressure when writing on the paper can simultaneously drive the two pen tips 2 toward the pen shell 1. The two pen tips 2 move in the rear end direction of the pen shell 1, and an elastic member 4 is provided between the two pen tips 2 and the pen shell 1 for driving the two pen tips 2 to return to the front end direction of the pen shell 1. A guiding mechanism is also provided between the two pen tips 2 and the pen shell 1. The guiding mechanism can drive the two pen tips 2 to move closer to each other and splice together while the two pen tips 2 move in the rear end direction of the pen shell 1, so that the ink adsorbed on the two pen tips 2 can penetrate and mix with each other, and can also drive the two pen tips 2 to separate while the two pen tips 2 move in the front end direction of the pen shell 1.

[0025] The porous pen tip 2 can store and transfer ink by using the capillary action of the pores. When writing, due to the pressure and friction generated by the contact between the pen tip 2 and the paper, the ink is evenly coated on the paper surface through the porous structure of the pen tip 2 under the combined action of capillary action and pressure, leaving traces. For example, the pen tip 2 can be a fiber pen tip. In order to improve the ink diffusion and mixing effect when two pen tips 2 are spliced, the pen tip 2 is preferably made of sintered polymer material.

[0026] When the pen is writing on paper, the pressure when in contact with the paper is used to drive the two pen tips 2 to move backward at the same time. The two pen tips 2 move closer to each other and splice together while moving backward. Since the two ink storage tubes 3 continuously supply ink to the two pen tips 2 during the writing process, the ink adsorbed on the two pen tips 2 will diffuse and mix as the two pen tips 2 are spliced ​​together, forming mixed color ink at the splicing of the two pen tips 2. Therefore, the written lines will appear: the two side areas of the line are two colors of ink, and the middle area of ​​the line is mixed color ink formed by the mixture of the two inks. In addition, due to the different degrees of ink diffusion, a gradient color effect will be produced at the junction of the middle area and the two side areas of the line, so that the written lines can show more than two colors.

[0027] In addition to the above-mentioned usage, one of the pen tips 2 can also be used alone to write on paper by changing the angle of the pen, so as to write lines of a single color.

[0028] A accommodating groove 11 is provided at the front end of the pen case 1, and the pen case 1 includes an inner cavity 12 for storing the ink storage tube 3. A connecting hole 13 communicating with the inner cavity 12 is provided at the bottom inner wall of the accommodating groove 11, and a water guide core 5 is movably penetrated at the connecting hole 13, and an ink supply connection is established between the pen tip 2 and the ink storage tube 3 through the water guide core 5. Two pen tip seats 6 are movably provided in the accommodating groove 11, and the two pen tips 2 are respectively fixed with the two pen tip seats 6, and the pen tip 2 and the pen tip seat 6 can move synchronously. The guiding mechanism is arranged between the pen tip seat 6 and the inner side wall of the accommodating groove 11, and the elastic member 4 is arranged between the rear end of the pen tip seat 6 and the bottom inner wall of the accommodating groove 11, and a limiting mechanism for limiting the front and rear movable range of the pen tip seat 6 is arranged between the pen tip seat 6 and the inner wall of the accommodating groove 11.

[0029] When the pen tip 2 is driven to move backward by the writing pressure, it will drive the pen tip seat 6 and the water guide core 5 to move backward. After the writing pressure is released, the elastic member 4 can push the pen tip seat 6, the pen tip 2 and the water guide core 5 to move forward. During the forward and backward movement of the pen tip seat 6, the guide mechanism set between the pen tip seat 6 and the inner wall of the receiving groove 11 guides the two pen tip seats 6 to move in the direction of approaching or moving away from each other, thereby achieving the close splicing or separation of the two pen tips 2. During the forward and backward movement of the pen tip 2 and other components, the limiting mechanism is used to limit their forward and backward range of movement, ensuring that the pen tip 2 has sufficient support force when writing, and also preventing the pen tip 2 and other components from falling out of the front end of the receiving groove 11.

[0030] The pen tip 2 includes a writing portion 21 and a supporting portion 22. The writing portion 21 is integrally formed at the front end of the supporting portion 22. A plug hole 61 is provided at the front end of the pen tip seat 6. The supporting portion 22 of the pen tip 2 is fixedly inserted into the plug hole 61 of the pen tip seat 6. A plurality of convex ribs are provided on the inner side wall of the plug hole 61 to improve the compression and positioning effect of the supporting portion 22 of the pen tip 2. The writing portion 21 of the pen tip 2 is exposed from the front end of the plug hole 61 for writing. A through hole 61 is provided at the rear end of the pen tip seat 6 for the water guide core 5 to pass through. 2, ink is supplied to the support portion 22 of the nib 2 located in the nib holder 6 through the water guide core 5, and the writing portions 21 of the two nibs 2 each include a splicing portion 210 that protrudes laterally outward relative to the side of the nib holder 6. When the two nibs 2 are brought close to each other, the splicing portion 210 forms mutual penetration of ink. In addition to being beneficial to widening the width of the writing line, the splicing portion 210 that protrudes laterally is also beneficial to improving the contact effect of the two nibs 2 and reducing the requirement for the lateral movement stroke of the nib holder 6.

[0031] The joint part 210 of the two pen tips 2 respectively has a concave part 2101 and a convex part 2102 which can match when they are brought together. The concave part 2101 and the convex part 2102 preferably have a concave arc-shaped and a convex arc-shaped contour, respectively, which can improve the alignment connection effect of the convex part 2102 and the concave part 2101. When matched, the convex part 2102 and the concave part 2101 constitute a limiting fit of the two pen tips 2 in a direction perpendicular to the direction of bringing together, so that the two pen tips 2 are in a relatively aligned state, thereby improving the writing effect.

[0032] The pen tip 2 includes a flat writing part 21, and the writing part 21 includes an arc-shaped first writing surface 211 located at the top of the writing part 21, an inclined and flat second writing surface 212 located on the wide surface of the writing part 21, and an inclined and flat third writing surface 213 located on the narrow surface of the writing part 21. The second writing surfaces 212 are two and adjacent to both sides of the first writing surface 211. The first writing surfaces 211 and the second writing surfaces 212 of the writing parts 21 of the two pen tips 2 are in a relatively aligned position when they are assembled, and the third writing surfaces 213 of the writing parts 21 of the two pen tips 2 are in opposite directions. When the pen tool writes at a relatively vertical angle, it contacts the paper surface through the first writing surface 211, and when the pen tool writes at a relatively inclined angle, it contacts the paper surface through the second writing surface 212. When the pen tool uses one of the pen tips 2 to write on the paper, it contacts the paper surface through the third writing surface 213, thereby improving the writing effect at different angles.

[0033] The guiding mechanism includes a first guiding bevel 63 arranged on the opposite side of the two pen tip seats 6, and a second guiding bevel 111 arranged on the inner walls on both sides of the accommodating groove 11 corresponding to the distribution direction of the two pen tip seats 6. The first guiding bevel 63 and the second guiding bevel 111 are in guiding contact and cooperation. When the two pen tip seats 6 move backward, the two pen tip seats 6 are driven to move in a direction close to each other through the guiding cooperation between the first guiding bevel 63 of the two pen tip seats 6 and the second guiding bevel 111 on the inner walls on both sides of the accommodating groove 11.

[0034] The guide mechanism includes two guide blocks 112 arranged at two inner side walls of the accommodating groove 11 perpendicular to the distribution direction of the two pen tip seats 6, and two third guide slopes 64 arranged on the corresponding side of the two pen tip seats 6. The two third guide slopes 64 of each pen tip seat 6 are respectively in guiding contact with the third guide slopes 64 of the two guide blocks 112, and the two sides of the lower end of the guide block 112 are provided with fourth guide slopes 1120 in guiding contact with the third guide slopes 64. When the two pen tip seats 6 are driven forward by the elastic member 4, the two pen tip seats 6 are driven to move in a direction away from each other through the guiding cooperation between the third guide slopes 64 of the two pen tip seats 6 and the two fourth guide slopes 1120 of the guide block 112.

[0035] The elastic member 4 is a spring, and a baffle 7 is movably provided in the accommodating groove 11. The baffle 7 is abutted against the rear ends of the two pen tip seats 6. The spring is abutted between the baffle 7 and the bottom inner wall of the accommodating groove 11. The spring indirectly pushes the two pen tip seats 6 forward through the baffle 7. The baffle 7 is provided so that the spring can evenly apply elastic force to the two pen tip seats 6 respectively, thereby improving the synchronization of the movement of the two pen tip seats 6. The baffle 7 is provided with a through hole 70 for the water guide core 5 to pass through, thereby avoiding interference between the baffle 7 and the water guide core 5.

[0036] In the second embodiment, the baffle 7 may not be provided. Fig. 9 As shown, a plug-in portion 60 is formed at the rear end of the overall structure formed by the two pen tip seats 6, and the front end of the spring (i.e., the elastic member 4) is sleeved with the plug-in portion 60 of the overall structure formed by the two pen tip seats 6, and the rear end of the spring is abutted with the bottom inner wall of the accommodating groove 11. In order to improve the sleeve connection effect between the spring and the plug-in portion 60, the plug-in portion 60 preferably has an arc surface that contacts with the inner side of the spring and a limiting portion for limiting the sleeve depth of the spring. The arc surface and the limiting portion are evenly distributed on the two pen tip seats 6, which can improve the stability when connected to the spring and ensure uniform force application of the spring. The side wall of the accommodating groove 11 also preferably has an arc-shaped profile, which can improve the contact and matching 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 components is reduced and the structure of the product is simplified.

[0037] In the first embodiment, if Figure 5 , 6 As shown in Figure 7, the limiting mechanism includes a protrusion 81 arranged between the side of the pen tip holder 6 and the inner wall of the accommodating groove 11. The protrusion 81 adopts a horizontal convex ridge, and the protrusions 81 of the two cooperate to limit the pen tip holder 6 to prevent it from slipping forward from the accommodating groove 11; the limiting mechanism also includes a support column 82 integrally formed at the bottom inner wall of the accommodating groove 11, and the front end of the support column 82 and the two pen tip holders 6 form a limiting fit. In the case of a baffle 7, the front end of the support column 82 and the baffle 7 form a limiting fit, and indirectly form a limiting fit with the two pen tip holders 6 through the baffle 7, so as to avoid excessive backward movement of the two pen tip holders 6, and can also play a supporting role for the pen tip 2 when writing.

[0038] The ink storage tube 3 is a wrapping core, which includes a cylindrical wrapping layer and fiber filaments filled in the wrapping layer. The wrapping core is fixed in the inner cavity 12 of the pen shell 1, and the rear end of the water guide core 5 is movably inserted into the inner side of the wrapping layer. Since the water guide core 5 will move forward and backward and laterally with the pen head 2, the rear end of the water guide core 5 and the wrapping core adopt this movable connection mode to ensure the effective connection and coordination between the water guide core 5 and the wrapping core, so that the water guide core 5 can stably obtain ink from the wrapping core. In addition, the elasticity of the water guide core 5 itself can also be used to achieve lateral movement. For example, the front end of the water guide core 5 can generate lateral swing under the drive of the pen head seat 6 and the pen head seat 6.

[0039] In the first embodiment, the water-inducing core 5 is an independent component, and the front end is plugged and fixed to the pen head 2. In the second embodiment, as shown in FIG. Fig. 9 As shown, the water-introducing core 5 and the pen tip 2 can also be integrally formed. In order to improve the swing effect of the front end of the water-introducing core 5, the through hole 70 and the connecting hole 13 are preferably waist-shaped holes.

[0040] In the third embodiment, if Fig.10 , 11 As shown, the main difference from the first embodiment is the different structure of the water guide core 5. In the third embodiment, the water guide core 5 is a split structure, and the water guide core 5 includes a front section 51 and a rear section 52 that are separately arranged. The front section 51 of the water guide core 5 is connected to the pen tip 2 and moves synchronously with the pen tip 2. The rear section 52 of the water guide core 5 is connected to the ink storage tube 3. The structure of the ink storage tube 3 is the same as that of the first two embodiments. The front section 51 and the rear section 52 of the water guide core 5 can contact when the two pen tips 2 are close together (such as Fig.11 As shown in the state, the rear section 52 of the water guide core 5 transports ink to the front section 51 by contacting with the front section 51, and can also be separated when the two pen tips 5 are separated (such as Fig.10The ink supply to the nib 2 and the front section 51 of the water guide core 5 is stopped when the pen is not in the writing state, which helps to reduce the volatilization speed of the ink in the ink storage tube 3. The front section 51 of the water guide core 5 and the nib 2 can be an integrally formed structure as in the second embodiment, or can be separated and connected by plugging as in the first embodiment.

[0041] The pen tip 2 is preferably made of sintered polymer material. In the sintering process, the polymer material in the form of tiny particles is heated to melt the particles and condense with each other. After sintering, a porous structure is formed inside the final pen tip 2. The final pen tip 2 has a good ink delivery effect, especially can improve the penetration and diffusion effect of ink when two pen tips 2 are in contact. The water guide core 5 is preferably made of fiber material.

[0042] In addition to the above differences, in the third embodiment, the limiting mechanism includes protrusions 81 respectively arranged on the opposite side of the pen tip holder 6 and on the inner walls on both sides of the accommodating groove 11 corresponding to the distribution direction of the two pen tip holders 6, and the second guide slope 111 is formed on the front side of the protrusion 81 of the accommodating groove 11, and the rear side of the protrusion 81 of the accommodating groove 11 and the front side of the protrusion 81 of the pen tip holder 6 both have a plane 811 that can cooperate with the limiting structure. Compared with the limiting structure using convex ridges in the above embodiments, the limiting effect is better, and the pen tip holder 6 is less likely to fall out of the accommodating groove 11.

[0043] In addition, the front end of the rear section 52 of the water guide core 5 has a relatively wide limit portion 521, and the diameter of the connection hole 13 is smaller than the width of the limit portion 521, which can prevent the rear section 52 from being pushed by the front section 51 and moving backward. The front section 51 of the water guide 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 being pushed by the rear section 52 and moving forward.

[0044] The above embodiment is only one of the preferred specific embodiments of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A double-nib fluorescent pen, comprising a pen housing, two nibs with a porous structure, and two ink storage tubes connected to the two nibs for ink delivery, wherein the two ink storage tubes store inks of different colors respectively, and the pen housing is connected to a pen cap, characterized in that: Two ink storage tubes are arranged side by side inside the pen shell, two pen tips are arranged at intervals at the front end of the pen shell and form a movable connection with the pen shell that can move along the length direction of the pen shell, and the pressure when writing on the paper can simultaneously drive the two pen tips to move toward the rear end direction of the pen shell, and an elastic component for driving the two pen tips to reset toward the front end direction of the pen shell is arranged between the two pen tips and the pen shell, and a guiding mechanism is also arranged between the two pen tips and the pen shell, and the guiding mechanism can drive the two pen tips to move toward each other and splice together while the two pen tips move toward the rear end direction of the pen shell, so that the ink absorbed on the two pen tips can penetrate and mix with each other, and can also drive the two pen tips to separate while the two pen tips move toward the front end direction of the pen shell.

2. The double-tip fluorescent pen according to claim 1, characterized in that: A accommodating groove is provided at the front end of the pen case, and the pen case includes an inner cavity for storing an ink storage tube. A connecting hole communicating with the inner cavity is provided on the bottom inner wall of the accommodating groove, and a water guide core is passed through the connecting hole. An ink supply connection is established between the pen tip and the ink storage tube via the water guide core. Two nib seats are movably provided in the accommodating groove, and the two nibs are respectively fixed with the two nib seats. The guiding mechanism is provided between the nib seat and the inner side wall of the accommodating groove, and the elastic member is provided between the rear end of the nib seat and the bottom inner wall of the accommodating groove. A limiting mechanism for limiting the front and rear movable range of the nib seat is provided between the nib seat and the inner wall of the accommodating groove.

3. The double-tip fluorescent pen according to claim 2, characterized in that: The nib comprises a writing portion and a supporting portion, wherein the writing portion is integrally formed at the front end of the supporting portion, a socket is provided at the front end of the nib seat, the supporting portion of the nib is fixedly inserted in the socket of the nib seat, the writing portion of the nib is exposed from the front end of the socket, a through hole is provided at the rear end of the nib seat for the water guide core to pass through, the writing portions of the two nibs both comprise a splicing portion which protrudes laterally outward relative to the side of the nib seat, and when the two nibs are brought close together, ink can be mutually infiltrated and matched through their splicing portions.

4. The double-tip fluorescent pen according to claim 3, characterized in that: The joint parts of the two pen tips are respectively provided with a concave part and a convex part which can match when they are brought together. When the convex part and the concave part match, the two pen tips form a limited fit in a direction perpendicular to the direction of the bringing together.

5. The double-tip fluorescent pen according to claim 4, characterized in that: The nib includes a flat writing part, which includes an arc-shaped first writing surface located at the top of the writing part, an inclined and flat second writing surface located on the wide surface of the writing part, and an inclined and flat third writing surface located on the narrow surface of the writing part. The first writing surfaces and the second writing surfaces of the writing parts of the two nibs are in relatively aligned positions when spliced ​​together, and the third writing surfaces of the writing parts of the two nibs are in opposite directions.

6. The double-tip fluorescent pen according to claim 2, characterized in that: The guiding mechanism includes a first guiding bevel arranged on the opposite side of the two pen holders, and a second guiding bevel arranged on the inner walls on both sides of the accommodating groove corresponding to the distribution direction of the two pen holders. The first guiding bevel and the second guiding bevel are in guiding contact and fit.

7. The double-tip fluorescent pen according to claim 6, characterized in that: The guiding mechanism includes guiding blocks arranged at two inner side walls of the accommodating groove perpendicular to the distribution direction of the two pen tip seats, a third guiding inclined surface arranged on the corresponding side of the two pen tip seats, and fourth guiding inclined surfaces on both sides of the lower end of the guiding block that are in guiding contact with the third guiding inclined surface.

8. The double-tip highlighter according to claim 2, characterized in that: The elastic component is a spring, and a baffle is movably arranged in the accommodating groove, the baffle is abutted against the rear ends of the two pen tip seats, the spring is abutted against the baffle and the bottom inner wall of the accommodating groove, and a through hole is arranged on the baffle for the water guide core to pass through; or a plug-in portion is formed at the rear end of the overall structure formed by the two pen tip seats, and the front end of the spring is sleeved with the plug-in portion of the overall structure formed by the two pen tip seats, and the rear end of the spring is abutted against the bottom inner wall of the accommodating groove.

9. The double-tip highlighter according to claim 2, characterized in that: The limiting mechanism includes protrusions arranged on the side of the pen tip seat and the inner wall of the accommodating groove, and the protrusions of the two cooperate to limit the pen tip seat to prevent the pen tip seat from slipping forward from the accommodating groove. The limiting mechanism also includes a support column integrally formed on the bottom inner wall of the accommodating groove, and the front end of the support column and the two pen tip seats form a limiting cooperation.

10. The double-tip highlighter according to claim 2, characterized in that: The ink storage tube is a rolled core, which includes a cylindrical wrapping layer and fiber filaments filled in the wrapping layer. The rolled core is fixed in the inner cavity of the pen shell. The water-drawing core is an integrated structure, the front end of the water-drawing core is connected to the pen tip, and the rear end of the water-drawing core is movably plugged into the inner side of the wrapping layer; or the water-drawing core is a split structure, the water-drawing core includes a front section and a rear section which are separately arranged, the front section of the water-drawing core is connected to the pen tip and moves synchronously with the pen tip, the rear section of the water-drawing core is connected to the ink storage tube, and the front section and the rear section of the water-drawing core can contact when the two pen tips are close together and spliced, and can be separated when the two pen tips are separated.

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