Double-ball pen point assembly and writing stationery

Abstract

The invention discloses a double-ball pen point assembly and writing stationery, and the double-ball pen point assembly comprises an adjuster which is provided with a through hole; a bowl opening is formed in one end of the ball seat, and an ink guiding flow channel is further formed in the ball seat and communicates with the bowl opening; a first ball; a second ball bead; an ink guide core; a first spring; wherein the first ball bead is arranged in the bowl opening, and the second ball bead is arranged in the ink guiding flow channel and abuts against the first ball bead. The ball seat is arranged on the adjuster, the ink guiding flow channel is communicated with the through hole, the ink guiding core is inserted into the through hole and the ink guiding flow channel, the ink guiding core abuts against the second ball bead, and the ink guiding core is configured to guide ink to flow to the bowl opening; the first spring is disposed in the regulator and is configured to apply an elastic force toward the second ball to the ink guide core. The assembly difficulty of writing stationery is reduced, so that the writing smoothness and the sealing reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of writing tools, and in particular to a double-ballpoint pen head assembly and writing stationery. Background Art

[0002] Ballpoint pens are classified into oil-based ballpoint pens, neutral ballpoint pens, and water-based ballpoint pens according to the ink used. Among them, water-based ballpoint pens have developed rapidly in recent years due to their low ink viscosity and fluent and labor-saving writing characteristics, and their market share has expanded year by year. However, the applicant has found that water-based ballpoint pens have the following problems during use: First, since the viscosity of the ink of water-based ballpoint pens is generally between 1-10mPa.s, ink leakage is prone to occur during the quality control process; second, during the writing process, it is easily affected by the quality of the pen tip, and the uniformity of the ink consumption of different individual products is difficult to control; third, the ink of water-based ballpoint pens is easy to evaporate, and the writing tool itself needs to be fully sealed to ensure the long-term storage and use of the product.

[0003] Chinese patent publication number CN112092518A discloses a tilting straight liquid double ball pen head assembly and a writing pen, which uses two upper and lower balls to improve writing smoothness and sealing reliability. During the assembly process, in order to meet the requirement that the two balls are against each other, a spring needs to be added between the ball and the ink core. However, assembling the spring at the ball is limited by the installation space, which makes assembly more difficult.

[0004] In view of this, how to design a writing stationery that is easy to assemble to reduce the difficulty of assembly is a technical problem to be solved by this application. Summary of the invention

[0005] The present application provides a double ballpoint pen tip and writing stationery, which can reduce the difficulty of assembling the writing stationery and improve the writing smoothness and sealing reliability.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions: The present application provides a double-ballpoint pen tip, comprising: an adjuster, a ball seat, a first ball, a second ball, an ink guide core and a first spring; the adjuster is provided with a through hole; a bowl mouth is provided at one end of the ball seat, and an ink guide channel is also provided in the ball seat, and the ink guide channel is connected to the bowl mouth; a plurality of ink guide grooves are also provided at the end of the ink guide channel close to the bowl mouth, and the ink guide grooves are connected to the bowl mouth; wherein the first ball is arranged in the bowl mouth, and the second ball is arranged in the ink guide channel and abuts against the first ball; the ball seat is arranged on the adjuster, the ink guide channel is connected to the through hole, the ink guide core is inserted in the through hole and the ink guide channel, the ink guide core abuts against the second ball, and the ink guide core is configured to guide ink to flow toward the bowl mouth; the first spring is arranged in the adjuster and configured to apply an elastic force toward the second ball to the ink guide core.

[0007] Another embodiment of the present application also provides a writing stationery, including an ink tank and the above-mentioned double-ballpoint pen tip assembly, wherein the regulator of the double-ballpoint pen tip assembly is inserted into the ink tank.

[0008] The technical solution of the present application has the following technical effects compared with the prior art: by arranging a first spring in the regulator, the first spring is used to apply elastic force to the ink guide core, so that when the writing stationery is not in use, the ink guide core relies on the elastic force applied by the first spring to press the second ball, so that the first ball is pressed by the second ball, and the first ball will be close to the edge of the bowl mouth to achieve a good sealing effect. At the same time, the first spring can be installed using the space occupied by the regulator, which reduces the difficulty of assembling the first spring. On the premise of improving writing smoothness and sealing reliability, the difficulty of assembling the writing stationery is reduced to improve assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A cross-sectional view of an embodiment of the writing stationery of the present application; Figure 2 for Figure 1 A schematic diagram of the structure of the double ballpoint pen head assembly; Figure 3 for Figure 1 A cross-sectional view of the double ballpoint pen head assembly; Figure 4 for Figure 3 A partial enlarged schematic diagram of the middle M region; Figure 5 A partial cross-sectional view of another embodiment of the writing stationery of the present application; Figure 6 It is an assembled cross-sectional view of a bead seat, a ball and an ink guide core in another embodiment of the writing stationery of the present application; Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle N region; Figure 8 A schematic diagram of the structure of an embodiment of the writing stationery of the present application in a closed state; Fig. 9 for Figure 8 A schematic structural diagram of an embodiment of a writing stationery in an open state; Fig.10 for Figure 8 A cross-sectional view of a writing stationery; Fig.11 for Fig.10 A partial enlarged schematic diagram of the middle A area; Fig.12 for Fig. 9 A cross-sectional view of a writing stationery; Fig.13 for Fig.12 A partial enlarged schematic diagram of the middle B area; Fig.14 for Fig. 9 One of the exploded diagrams of writing stationery; Fig.15 for Fig. 9 Exploded view of writing stationery in Chinese (part 2); Fig.16 for Figure 8 A schematic diagram of the structure of the first casing; Fig.17 for Figure 8 A schematic diagram of the structure of the second casing; Fig.18 for Figure 8 One of the structural diagrams of the middle seal; Fig.19 for Figure 8 The second structural diagram of the middle seal.

[0010] Reference numerals: 1. Ink tank; 2. Double ball pen head assembly; 21. Ball seat; 22. Regulator; 23. First ball; 24. Second ball; 25. Ink guide core; 26. First spring; 27. Mounting bracket; 211, bowl mouth; 212, ink guide channel; 213, mounting seat; 214, metal tube; 215, soft rubber sleeve; 216, buffer part; 221, through hole; 251, second step surface; 3. Sealing assembly; 31. First sleeve; 32. Sealing element; 33. Sealing ring; 34. Second sleeve; 311, opening; 312, pulling part; 313, pushing part; 314, limiting part; 315, sliding groove; 316, clamping part; 317, plug-in part; 318, guide slot; 319, installation guide groove; 341, slider; 342, guide part; 321, sealing part; 322, first connecting part; 323, second connecting part; 324, flexible connecting part; 3221, pulling fitting part; 3222, pushing fitting part; 3223, first elastic claw; 3231, second elastic claw; 4. Second spring. DETAILED DESCRIPTION

[0011] In embodiment 1, the present application provides a Figure 1-Figure 4 As shown, the present application provides a writing tool, including an ink tank 1 and a double-ballpoint pen head assembly 2.

[0012] The double ballpoint pen tip assembly 2 includes: a regulator 22 , a ball seat 21 , a first ball 23 , a second ball 24 , an ink guide core 25 and a first spring 26 .

[0013] The regulator 22 is provided with a through hole 221; a bowl mouth 211 is provided at one end of the bead seat, and an ink introduction channel 212 is also provided in the bead seat, and the ink introduction channel 212 is connected to the bowl mouth 211; the end of the ink introduction channel 212 close to the bowl mouth 211 is also provided with a plurality of ink guide grooves (not shown), and the ink guide grooves are connected to the bowl mouth 211; wherein the first ball 23 is arranged in the bowl mouth 211, and the second ball 24 is arranged in the ink introduction channel 212 and abuts against the first ball 23. close together; the ball seat 21 is arranged on the regulator 22, the ink guide channel 212 is connected with the through hole 221, the ink guide core 25 is inserted into the through hole 221 and the ink guide channel 212, the ink guide core 25 is against the second ball 24, and the ink guide core 25 is configured to guide the ink to flow toward the bowl mouth 211; the first spring 26 is arranged in the regulator 22 and is configured to apply an elastic force to the ink guide core 25 toward the second ball 24.

[0014] The regulator 22 is inserted into the ink tank 1 .

[0015] Specifically, during the assembly process, the first ball 23 is assembled into the bowl mouth 211, the second ball 24 is placed into the ink introduction channel 212 and abuts against the first ball 23; the ball seat 21 and the regulator 22 are assembled and connected together, the ink guide core 25 is inserted into the ink introduction channel 212 and the through hole 221, and the ink guide core 25 abuts against the second ball 24. In addition, when not in use, under the action of the first spring 26, the ink guide core 25 can be pressed against the second ball 24, and then the second ball 24 presses the first ball 23, so that the first ball 23 can seal the edge of the bowl mouth 211 to achieve a good sealing effect.

[0016] During the assembly process, since the first spring 26 is assembled on the regulator 22 , the regulator 22 itself has a larger structural size and can provide a larger installation space to install the first spring 26 , thereby reducing the difficulty of installing the first spring 26 .

[0017] During use, the ink guide core 25 flows toward the bowl mouth 211, and the ink flow smoothness is enhanced through the ink guide groove near the bowl mouth 211 to ensure that the first ball 23 can write smoothly.

[0018] In some embodiments, Figure 4 As shown, the first spring 26 is sleeved on the ink guiding core 25; The end of the through hole 221 away from the ball seat 21 is provided with a first step surface, the ink guiding core 25 is provided with a second step surface 251 , and the first spring 26 is sandwiched between the first step surface and the second step surface 251 .

[0019] Specifically, in order to facilitate the installation of the first spring 26, the first spring 26 can be sleeved on the ink guiding core 25, and the ink guiding core 25 is used to support and install the first spring 26. At the same time, in order to satisfy the first spring 26 to apply elastic force to the ink guiding core 25, a first step surface can be provided in the through hole 221, and correspondingly, a second step surface 251 is provided on the ink guiding core 25, so that the first spring 26 is sandwiched between the first step surface and the second step surface 251.

[0020] In another embodiment, Figure 5 As shown, in order to facilitate the installation of the first spring 26 , a mounting bracket 27 is further provided at the end of the regulator 22 away from the ball seat 21 , and the first spring 26 is arranged between the mounting bracket 27 and the ink guiding core 25 .

[0021] Specifically, the mounting bracket 27 is disposed at the end of the adjuster 22 , so that the first spring 26 is installed and fixed by the mounting bracket 27 .

[0022] Similarly, the ink guiding core 25 is provided with a second step surface 251, the first spring 26 is sleeved on the ink guiding core 25, and the first spring 26 is clamped between the second step surface 251 and the mounting bracket 27; or, the first spring 26 is clamped between the end surface of the ink guiding core 25 and the mounting bracket 27.

[0023] In another embodiment of the present application, Figure 6-Figure 7 As shown, in order to further protect the first ball 23 exposed on the bead seat 21, the bead seat includes a mounting seat 213 and a metal tube 214, the mounting seat 213 is provided with a mounting socket, and the mounting socket is a stepped hole; the metal tube 214 is provided with the bowl mouth 211 and the ink guide channel 212, the metal tube 214 is inserted into one port of the mounting socket, and the regulator 22 is inserted into the other port of the mounting socket.

[0024] Specifically, the first ball 23 and the second ball 24 are installed through the bowl mouth 211 and the ink guide channel 212 formed by the metal tube 214. The metal tube 214 is assembled on the mounting seat 213 and connected to the regulator 22 through the mounting seat 213.

[0025] In order to protect the first ball 23, the bead seat also includes a soft rubber sleeve 215, which is sleeved on the outside of the metal tube 214; the first end of the soft rubber sleeve 215 wraps the first end of the metal tube 214 and surrounds the outside of the bowl mouth 211, the second end of the metal tube 214 and the second end of the soft rubber sleeve 215 are inserted into the mounting socket, and the first end of the metal tube 214 and the first end of the soft rubber sleeve 215 are located outside the mounting seat 213.

[0026] Specifically, the soft rubber sleeve 215 adopts an elastic tube, and the soft rubber sleeve 215 can wrap and protect the first end of the metal tube 214 located outside the mounting seat 213. The first end of the soft rubber sleeve 215 is wrapped around the outside of the first end of the metal tube 214, and the first end of the soft rubber sleeve 215 surrounds the outside of the bowl mouth 211 to provide buffering protection for the bowl mouth 211 of the metal tube 214.

[0027] When the writing tool falls from a height during the writing process, the first end of the soft rubber sleeve 215 can provide buffering protection for the outer peripheral portion of the first end of the metal tube 214, thereby effectively protecting the first ball 23 in the bowl mouth 211, so as to increase the possibility of the first ball 23 rolling smoothly in the bowl mouth 211 after falling, thereby improving the reliability of the writing tool.

[0028] At the same time, the second end of the soft rubber sleeve 215 is also located in the mounting seat 213. When falling, the soft rubber sleeve 215 can produce elastic deformation when in contact with the ground, thereby ensuring that both ends of the metal tube 214 can obtain effective cushioning, reducing the deformation of the metal tube 214 and causing the inability to output ink smoothly, thereby improving the overall protection capability of the metal tube 214 and improving the overall reliability of the writing tool.

[0029] In another embodiment, a buffer portion 216 is further provided on the inner tube wall of the second end portion of the soft rubber sleeve 215 ; the end surface of the second end portion of the metal tube 214 abuts against the buffer portion 216 .

[0030] Specifically, under normal circumstances, when a writing tool falls, it will fall in an inclined posture. In some cases, when the writing tool falls in a substantially vertical state, the first ball 23 will be damaged by directly hitting the ground. For this reason, a buffer portion 216 is formed in the inner tube wall of the second end of the soft rubber sleeve 215, and the buffer portion 216 supports the end face of the second end of the metal tube 214. In this way, when falling vertically, after the first ball 23 contacts the ground, the metal tube 214 can compress the buffer portion 216 and thus play a role in buffering the impact, thereby reducing the occurrence of the first ball 23 being unable to write due to deformation.

[0031] Embodiment 2, as Figure 8-Figure 19 As shown, based on the above-mentioned embodiment 1, the present application also provides a writing stationery, including an ink tank 1 and a double-ballpoint pen head assembly 2 of the above-mentioned embodiment 1.

[0032] The writing stationery further includes a sealing assembly 3, the sealing assembly 3 including a first sleeve 31, a second sleeve 34 and a sealing member 32, an opening 311 is formed at one end of the first sleeve 31, a slide groove 315 is provided on the tube wall of the other end of the first sleeve 31, a slider 341 is provided on the inner wall of the second sleeve, and the slider 341 is slidably provided in the slide groove 315; The sealing member 32 is provided with a reversible sealing component 321, the sealing member 32 is located in the first sleeve 31, and the sealing component is configured to open and close the opening 311; Among them, the sealing member 32 is arranged on the outside of the ink tank 1, the first sleeve 31 is sleeved on the outside of the ink tank 1 and close to the bead seat 21, and the second sleeve 34 is sleeved on the outside of the ink tank 1 and away from the bead seat 21; the first sleeve 31 is slidably arranged on the ink tank 1 to slide; the first sleeve 31 is configured to slide along the ink tank 1 and drive the sealing member 321 to flip to open and close the opening 311.

[0033] Specifically, in the actual assembly process, after the double-ballpoint pen tip assembly 2 is loaded into the ink tank 1, the end of the first ball in the ball seat 21 of the double-ballpoint pen tip assembly 2 is exposed outside the ink tank 1; then, the seal 32 is installed on the outside of the ink tank 1 and the first sleeve 31 is put on the seal 32, and the first sleeve 31 will be simultaneously put on the outside of the ink tank 1; the second sleeve 34 is also put on the ink tank 1, and the first sleeve 31 and the second sleeve 34 are docked, so that the slider 341 is loaded into the slide groove 315, so as to realize the sliding assembly of the slider 341 and the slide groove 315.

[0034] When the first sleeve 31 slides back and forth along the ink tank 1 , the slider 341 cooperates with the slide groove 315 to guide the first sleeve 31 to slide back and forth smoothly, so as to improve the smoothness of use.

[0035] During use, the first sleeve 31 is pushed and pulled to make the first sleeve 31 reciprocate along the ink tank 1. When the opening 311 needs to be opened to expose the bead seat 21 for writing, the first sleeve 31 can be pushed toward the second sleeve 34. During the sliding process of the first sleeve 31 on the ink tank 1, the sealing component 321 on the sealing member 32 will be turned to the outside of the opening 311 to open the opening 311. At the same time, the bead seat 21 will extend out of the opening 311 of the first sleeve 31.

[0036] On the contrary, when the opening 311 needs to be closed so that the bead seat 21 is retracted into the first sleeve 31 for protection, the first sleeve 31 is pulled in the opposite direction away from the second sleeve 34. During the sliding process of the first sleeve 31 on the ink tank 1, the sealing component 321 on the sealing member 32 will be driven to flip into the opening 311 to close the opening 311, and at the same time, the bead seat 21 will be retracted into the first sleeve 31.

[0037] By setting a sealing assembly 3 on the outside of the ink tank 1, the first sleeve 31 is sleeved on the outside of the ink tank 1 and can slide on the outside of the ink tank 1. The sliding first sleeve 31 can drive the sealing component 321 on the sealing member 32 to flip, thereby opening the opening 311 of the first sleeve 31 to allow the bead seat 21 to extend out of the opening 311 for writing, or closing the opening 311 to protect the bead seat 21. During use, when the opening 311 needs to be opened for use, the user pulls the first sleeve 31 to make the first sleeve 31 slide on the ink tank 1, thereby driving the sealing component 321 to flip and open the opening 311 to expose the bead seat 21 of the double-ball pen head assembly 2. In this way, it is possible to avoid exposure of the bead seat 21 due to misoperation caused by pressing, thereby reducing misoperation and improving user experience and safety.

[0038] When the sealing component 321 is flipped over to close the opening 311 , the ball seat 21 of the double-ballpoint pen tip assembly 2 is located inside the opening 311 , and the ball seat 21 of the double-ballpoint pen tip assembly 2 is located inside the first sleeve 31 .

[0039] Specifically, when not in use, the opening 311 of the first sleeve 31 is blocked by the sealing component 321 of the sealing member 32, thereby forming a relatively closed space between the first sleeve 31, the sealing component 321 and the second sleeve 34, and the ball seat 21 and the ink tank of the double-ballpoint pen tip assembly 2 are located in the relatively closed space for protection.

[0040] That is, when the sealing component 321 is flipped over to close the opening 311 , the ink tank 1 and the double-ballpoint pen head assembly 2 are wrapped in the sealing assembly.

[0041] In addition, when the sealing component 321 is flipped to open the opening 311 , the ball seat 21 of the double-ballpoint pen tip assembly 2 is located outside the opening 311 , and the first sleeve 31 is away from the ball seat 21 of the double-ballpoint pen tip assembly 2 .

[0042] Specifically, when the user needs to use it, the first sleeve 31 is pulled outside the ink tank 1 to open it. The specific process is that the first sleeve 31 slides outside the ink tank 1 in a direction away from the ball seat 21. During the sliding process of the first sleeve 31, on the one hand, the sealing component 321 will be exposed from the opening 311, and on the other hand, the exposed sealing component 321 will flip open the opening 311 and finally make the pen tip of the double ball pen tip assembly 2 extend from the opening 311.

[0043] In some embodiments, a clamping portion 316 is provided in the slide groove, and the clamping portion 316 is arranged at the end of the slide groove 315 close to the bead seat 21; The engaging portion 316 is configured to engage with the slider 341 to position the first sleeve 31 on the ink tank 1 when the sealing component 321 is flipped over to open the opening 311 .

[0044] Specifically, since the first sleeve 31 drives the sealing component 321 to open and close the opening 311 by a push-pull method, when the user is writing, it is necessary to ensure that the first sleeve 31 remains unchanged. To this end, a clamping portion 316 is provided in the slide groove 315. After the first sleeve 31 is pushed to expose the bead seat 21, the slider 341 slides relatively in the slide groove 315 to approach the clamping portion 316 and finally engages with the clamping portion 316 to limit the position of the first sleeve 31 on the ink tank 1.

[0045] There may be a variety of structures for the entity of the snap-fit ​​portion 316 . For example, the snap-fit ​​portion 316 is a protruding structure disposed in the slide groove 315 to meet the requirement of snap-fitting the slider 341 to achieve positioning of the first sleeve 31 .

[0046] In another embodiment, an outwardly extending plug-in portion 317 is formed at the end of the first sleeve away from the bead seat, the plug-in portion 317 is provided with the slide groove 315 , and the plug-in portion 317 is inserted into the second sleeve 34 .

[0047] Specifically, in order to improve the connection reliability between the first sleeve 31 and the second sleeve 34 and ensure the smooth sliding of the first sleeve 31, a plug-in portion 317 is provided at the corresponding end of the first sleeve 31 to be inserted into the second sleeve 34, so that when the first sleeve 31 slides on the ink tank 1, the plug-in portion 317 is always inserted in the second sleeve 34 to improve the sliding stability.

[0048] In some embodiments, the end of the second sleeve 34 facing the bead seat 21 is provided with a guide portion 342 extending outward; A guide slot 318 is provided on the outer tube wall of the first sleeve 31 , and the guide portion 342 is inserted into the guide slot 318 .

[0049] Specifically, during the sliding of the first sleeve 31 , in addition to the mutual guidance between the slider 341 and the slide groove 315 , the sliding of the first sleeve 31 can be further guided by the cooperation between the guide portion 342 and the guide slot 318 .

[0050] In another embodiment, in order to conveniently insert the slider 341 into the slide groove 315, a mounting guide groove 319 is provided at the edge of the port of the plug-in portion; Along the length direction of the slide groove 315 , the mounting guide groove 319 is arranged on the outer side of the slide groove 315 .

[0051] Specifically, during the assembly process, after the first sleeve 31 and the second sleeve 34 are both sleeved on the outside of the ink tank 1, the plug-in portion 317 of the first sleeve 31 is inserted into the second sleeve 34, and the slider 341 will be easily installed into the slide groove 315 through the installation guide groove 319 to achieve the purpose of convenient assembly.

[0052] In addition, for the first sleeve 31, both ends thereof are open structures. For the second sleeve 34, one end thereof is an open structure, and the other end is a closed structure to meet the cooperation with the end of the ink tank 1 away from the bead seat 21 to limit the ink tank 1 from being separated from the second sleeve 34. For example, the end of the second sleeve 34 that needs to be closed is provided with a plug 340, and the plug 340 can be clamped on the second sleeve 34.

[0053] In another embodiment of the present application, for the seal 32 , in order to enable the sealing component 321 to flip over to open and close the opening 311 under the drive of the first sleeve 31 , the specific structure of the seal 32 is improved as follows.

[0054] The sealing member 32 includes a first connecting member 322, a second connecting member 323 and a flexible connecting member 324. The sealing member 321 is disposed between the first connecting member 322 and the second connecting member 323 via the flexible connecting member 324. The sealing member 321 can be turned over relative to the first connecting member 322 and the second connecting member 323. The first sleeve 31 is provided with a pulling portion 312, and the pulling portion 312 is configured to pull the first connecting component 322 to slide together when the first sleeve 31 slides toward the direction away from the ball seat 21 of the double-ball pen head assembly 2, so that the sealing component 321 is exposed from the opening 311 and flipped to open the opening 311.

[0055] Specifically, in order to achieve the sliding of the first sleeve 31 in the direction away from the bead seat 21 to drive the sealing component 321 to flip and open the opening 311, a pulling portion 312 is provided on the inner wall of the first sleeve 31. During the movement of the first sleeve 31, the pulling portion 312 will apply a pulling force to the first connecting component 322, so that the first connecting component 322 can follow the first sleeve 31 to move on the ink tank 1. During the movement of the first connecting component 322 relative to the ink tank 1, the first connecting component 322 will move relative to the second connecting component 323, and the flexible connecting component 324 is used to make the sealing component 321 flip between the first connecting component 322 and the second connecting component 323 to open the opening 311.

[0056] A protruding pull-fit portion 3221 is provided on the outer surface of the first connecting component 322 , and the pulling portion 312 will be pressed against the pull-fit portion 3221 , thereby making the first connecting component 322 slide on the ink tank 1 following the first sleeve 31 .

[0057] In another embodiment, a pushing portion 313 is provided on the inner wall of the first sleeve 31, and the pulling portion 312 is located between the pushing portion 313 and the opening 311; the pushing portion 313 is configured to push the first connecting component 322 to slide together when the first sleeve 31 slides toward the ball seat 21 close to the double-ballpoint pen head assembly 2 so that the sealing component 321 flips over and retracts into the opening 311 to close the opening 311.

[0058] Specifically, after use, the user pushes the first sleeve 31 in the reverse direction to move the first sleeve 31 toward the bead seat 21. During the movement, the first sleeve 31 pushes the first connecting component to move in the reverse direction through the pushing portion 313, thereby enabling the first connecting component to slide toward the bead seat 21. During the sliding process, the sealing component 321 flips and resets and finally blocks the opening 311 of the first sleeve 31.

[0059] Likewise, a push fitting portion 3222 may be disposed on the first connecting component, and the first connecting component may be pushed back to its original position by the pushing portion 313 abutting against the push fitting portion 3222 .

[0060] In some embodiments, in order to enable the first connecting member and the second connecting member to achieve intermittent sliding during the reciprocating sliding of the first sleeve 31, a first elastic claw 3223 may be provided on the first connecting member, a second elastic claw 3231 may be provided on the second connecting member, and a limiting portion 314 may also be provided in the first sleeve 31.

[0061] Specifically, when the sealing component 321 is in a state of closing the opening 311 , the first elastic claw 3223 and the second elastic claw 3231 are staggered along the length direction of the ink tank 1 , wherein the first elastic claw 3223 is close to the opening 311 , and the second elastic claw 3231 is far away from the opening 311 .

[0062] Thus, during the opening process, the first sleeve 31 moves so that the first elastic claw 3223 and the second elastic claw 3231 arranged in a staggered manner sequentially pass over the limiting portion 314 and move to one side of the limiting portion 314. During this process, the pulling portion 312 gradually approaches the pulling fitting portion 3221, the sealing member 32 remains substantially stationary, and the sealing member 321 is exposed from the opening 311.

[0063] As the first sleeve 31 continues to move, the pulling portion 312 abuts against the pulling fitting portion 3221. At this time, the first connecting component will move with the first sleeve 31, and the second connecting component will remain stationary because the second elastic claw 3231 is stuck on the limiting portion 314. In this way, the sealing component 321 can be flipped open.

[0064] In one embodiment, in order to improve the sealing performance, a sealing ring 33 is further provided in the first sleeve 31 . The sealing ring 33 is sleeved on the outside of the ink tank 1 and is located between the pushing portion 313 and the sealing member 32 .

[0065] Specifically, the opening 311 of the first sleeve 31 is blocked and covered by a sealing component 321 , and the first sleeve 31 and the ink tank 1 are airtightly sealed by a sealing ring 33 .

[0066] In one embodiment, in order to maintain an effective closed state in a state without force when the sealing component 321 closes the opening 311, the writing instrument further includes a second spring 4, which is disposed between the first sleeve 31 and the ink tank 1, and the second spring 4 is configured to apply a second spring 4 force to the first sleeve 31 in a direction toward the ball seat 21 of the double ball pen head assembly 2.

[0067] Specifically, when the opening 311 is closed by the sealing component 321, the second spring 4 will always exert elastic force on the first sleeve 31 to ensure that the first sleeve 31 does not slide on the ink tank 1 at will. When the user needs to open the first sleeve 31 for use, he pulls the first sleeve 31 to overcome the elastic force of the second spring 4. The second spring 4 is located in the first sleeve 31.

[0068] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A double ballpoint pen tip assembly, characterized in that: include: A regulator, wherein the regulator is provided with a through hole; A bead seat, wherein one end of the bead seat is provided with a bowl mouth, and an ink introduction channel is also provided in the bead seat, and the ink introduction channel is connected to the bowl mouth; a plurality of ink guide grooves are also provided at the end of the ink introduction channel close to the bowl mouth, and the ink guide grooves are connected to the bowl mouth; First ball; The second ball; Ink guide core; First spring; Among them, the first ball is arranged in the bowl mouth, the second ball is arranged in the ink guide channel and abuts against the first ball; the ball seat is arranged on the regulator, the ink guide channel is connected with the through hole, the ink guide core is inserted in the through hole and the ink guide channel, the ink guide core abuts against the second ball, and the ink guide core is configured to guide ink to flow toward the bowl mouth; the first spring is arranged in the regulator and is configured to apply an elastic force to the ink guide core in the direction of the second ball.

2. The double ballpoint pen tip assembly according to claim 1, characterized in that: The first spring is sleeved on the ink guiding core; The end of the through hole away from the ball seat is provided with a first step surface, the ink guiding core is provided with a second step surface, and the first spring is sandwiched between the first step surface and the second step surface.

3. The double ballpoint pen tip assembly according to claim 1, characterized in that: The end of the regulator away from the ball seat is also provided with a mounting bracket, and the first spring is arranged between the mounting bracket and the ink guiding core.

4. The double ballpoint pen tip assembly according to claim 3, characterized in that: The ink guide core is provided with a second step surface, the first spring is sleeved on the ink guide core, and the first spring is sandwiched between the second step surface and the mounting bracket; Alternatively, the first spring is sandwiched between an end surface of the ink guiding core and the mounting bracket.

5. The double ballpoint pen tip assembly according to any one of claims 1 to 4, characterized in that: The bead seat comprises a mounting seat and a metal tube, the mounting seat is provided with a mounting socket, and the mounting socket is a stepped hole; The bowl mouth and the ink introduction channel are arranged on the metal tube, the metal tube is inserted into one port of the installation socket, and the regulator is inserted into the other port of the installation socket.

6. The double ballpoint pen tip assembly according to claim 5, characterized in that: It also includes a soft rubber sleeve, which is sleeved on the outside of the metal tube; the first end of the soft rubber sleeve wraps the first end of the metal tube and surrounds the outside of the bowl mouth, the second end of the metal tube and the second end of the soft rubber sleeve are inserted into the mounting socket, and the first end of the metal tube and the first end of the soft rubber sleeve are located outside the mounting seat.

7. The double ballpoint pen tip assembly according to claim 6, characterized in that: A buffer portion is also provided on the inner tube wall of the second end portion of the soft rubber sleeve; An end surface of the second end portion of the metal tube abuts against the buffer portion.

8. A writing stationery, comprising an ink tank, characterized in that: It also includes a double-ballpoint pen tip assembly as described in any one of claims 1 to 7, wherein the regulator of the double-ballpoint pen tip assembly is inserted into the ink tank.

9. The writing instrument according to claim 8, characterized in that: Also included is a seal assembly and a second spring; The sealing assembly comprises a first sleeve, a second sleeve and a sealing member, wherein an opening is formed at one end of the first sleeve, a slide groove is arranged on the tube wall of the other end of the first sleeve, a slider is arranged on the inner wall of the second sleeve, and the slider is slidably arranged in the slide groove; a reversible sealing component is arranged on the sealing member, the first sleeve is sleeved on the outside of the sealing member, and the sealing component is configured to open and close the opening; The second spring is disposed between the first sleeve and the ink tank, and the second spring is configured to apply a second spring force toward the ball seat of the double ball pen head assembly to the first sleeve; Wherein, the sealing component is arranged on the outside of the ink tank, the first sleeve is sleeved on the outside of the ink tank and close to the ball seat of the double-ball pen tip assembly, and the second sleeve is sleeved on the outside of the ink tank and away from the ball seat; the first sleeve is slidably arranged on the ink tank and is configured to slide along the ink tank and drive the sealing component to flip to open and close the opening.

10. The writing instrument according to claim 9, characterized in that: The sealing member comprises a first connecting member, a second connecting member and a flexible connecting member, wherein the sealing member is arranged between the first connecting member and the second connecting member through the flexible connecting member, and the sealing member can be turned over relative to the first connecting member and the second connecting member; The first sleeve is provided with a pulling portion, and the pulling portion is configured to pull the first connecting component to slide together when the first sleeve slides in a direction away from the ball seat of the double ball pen head assembly, so that the sealing component is exposed from the opening and flipped to open the opening; The inner wall of the first sleeve is provided with a pushing portion, and the pulling portion is located between the pushing portion and the opening; the pushing portion is configured to push the first connecting component to slide together when the first sleeve slides toward the ball seat close to the double-ballpoint pen head assembly so that the sealing component flips and retracts into the opening to close the opening.

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