Writing stationery

Abstract

The writing stationery comprises a pen holder and a pen refill, the pen refill is arranged in the pen holder, and a pen point of the pen refill extends out of the pen holder; the writing stationery further comprises a sealing assembly, the sealing assembly comprises a sleeve and a sealing piece, an opening is formed in one end of the sleeve, a turnover sealing part is arranged on the sealing piece, the sealing piece is located in the sleeve, and the sealing part is configured to open and close the opening. Wherein the sealing piece is arranged outside the pen holder, and the sleeve is arranged outside the pen holder in a sleeving mode and can slide on the pen holder; the sleeve is configured to slide on the pen holder to drive the sealing component to turn over so as to open and close the opening. Misoperation is reduced, so that the use experience and safety of a user are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of writing tools, and particularly to a writing stationery. Background Art

[0002] At present, writing pens are essential stationery in people's daily life and work. The pen tips of some types of writing pens need to be sealed when not in use, and the ways to achieve sealing are generally divided into: push-type writing stationery and cap-type writing pens. Due to the convenient operation of push-type writing stationery, it is widely used. For example, Chinese Patent Publication Nos. CN116215117A and CN116215117A respectively disclose a push-type writing stationery, both of which use the pushing method to drive the pen core to slide in the pen barrel, so that the shielding part in the sealing component flips. In this way, the pen core can be sealed in the pen barrel by the shielding part, or the shielding part flips open to make the pen tip of the pen core extend out of the pen barrel. However, in the actual use process, the pressing part at the end of the pen barrel is easily mispressed by external force, causing the pen tip of the pen core to extend. On the one hand, it is easy to cause the pen tip to lose moisture and be unable to write, and on the other hand, it is easy to contaminate the user's clothes or paper. In view of this, how to design a technology that reduces misoperation to improve the user experience and safety is the technical problem to be solved by the present invention. Summary of the Invention

[0003] The present invention provides a writing stationery to reduce misoperation and improve the user experience and safety.

[0004] To achieve the above object, the present invention adopts the following technical solutions: The present invention provides a writing stationery, including a pen barrel and a pen core. The pen core is disposed in the pen barrel, and the pen tip of the pen core extends out of the pen barrel. The writing stationery further includes a sealing component, which includes a sleeve and a sealing member. One end of the sleeve forms an opening, and the sealing member is provided with a flipable sealing part. The sealing member is located in the sleeve, and the sealing part is configured to open and close the opening. Wherein, the sealing member is disposed outside the pen barrel, and the sleeve is sleeved outside the pen barrel and can slide on the pen barrel; the sleeve is configured to slide on the pen barrel to drive the sealing part to flip to open and close the opening.

[0005] Further, in the state where the sealing part flips open the opening, the pen tip of the pen core is located outside the opening, and the sleeve is away from the pen tip of the pen core; In the state where the sealing part flips to close the opening, the pen tip of the pen core is located inside the opening, and the pen tip of the pen core is located inside the sleeve.

[0006] Further, the seal includes a first connecting member, a second connecting member, and a flexible connecting member. The sealing member is disposed between the first connecting member and the second connecting member through the flexible connecting member, and the sealing member is flip - able relative to the first connecting member and the second connecting member; The sleeve is provided with a pulling portion, and the pulling portion is configured to pull the first connecting member to slide together during the process of the sleeve sliding in a direction away from the tip of the refill, so that the sealing member is exposed from the opening and the opening is flipped open.

[0007] Further, a pushing portion is provided on the inner wall of the sleeve, and the pulling portion is located between the pushing portion and the opening; the pushing portion is configured to push the first connecting member to slide together during the process of the sleeve sliding in a direction close to the tip of the refill, so that the sealing member is flipped and retracted into the opening to close the opening.

[0008] Further, the sleeve includes a first cylinder and a second cylinder, and the first cylinder and the second cylinder are detachably connected together; An end of the first cylinder forms the opening, the pulling portion is provided on the inner wall of the first cylinder, and the pushing portion is provided on the inner wall of the second cylinder.

[0009] Further, a sealing ring is also provided in the sleeve, and the sealing ring is sleeved outside the pen barrel and located between the pushing portion and the seal.

[0010] Further, a positioning portion is provided on the pen barrel, and a positioning and mating portion cooperating with the positioning portion is provided on the sleeve; In a state where the sealing member flips open the opening, the positioning portion is connected to the positioning and mating portion to position the sleeve and keep it stationary at the position where the pen barrel is located.

[0011] Further, a spring is further included, and the spring is disposed between the sleeve and the pen barrel, and the spring is configured to apply a spring force to the sleeve in a direction towards the tip of the refill.

[0012] Further, the spring is located in the sleeve.

[0013] Further, the pen barrel includes a first rod body and a second rod body, and the first rod body and the second rod body are detachably connected together; The refill is inserted into the first rod body, the tip of the refill extends outside the first rod body, and the second rod body is sleeved outside the refill.

[0014] Further, a plug-in portion is provided at the end of the pen barrel away from the pen tip of the refill; The plug-in portion is configured such that the pen barrels of two writing stationeries are plugged into each other from the side through the plug-in portion, so that the two writing stationeries are connected together.

[0015] Further, the plug-in portion includes a slot and a plug strip arranged side by side.

[0016] The technical solution of the present invention has the following technical effects compared with the prior art: By providing a sealing assembly outside the pen barrel, the sleeve is sleeved outside the pen barrel and can slide outside the pen barrel. The sliding sleeve can drive the sealing component on the seal to flip, thereby realizing opening the opening of the sleeve to meet the pen tip of the pen core to extend out of the opening for writing use, or closing the opening to protect the pen tip of the pen core; During use, when it is necessary to open the opening for use, the user pulls the sleeve to make the sleeve slide on the pen barrel, thereby driving the sealing component to flip and open the opening to expose the pen tip of the pen core. In this way, it is possible to avoid accidental exposure of the pen tip caused by accidental operation when using the pressing method, and reduce accidental operation to improve the user experience and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the writing stationery of the present invention in a closed state; Figure 2 is Figure 1 a schematic structural diagram of the writing stationery in the open state in; Figure 3 is Figure 1 a cross-sectional view of the writing stationery in; Figure 4 is Figure 3 a partial enlarged schematic view of area A in; Figure 5 is Figure 2 a cross-sectional view of the writing stationery in; Figure 6 is Figure 5 a partial enlarged schematic view of area B in; Figure 7 is Figure 1 an exploded view of the writing stationery in; Figure 8 is Figure 1 a schematic structural diagram of the first cylinder in; Figure 9 is Figure 1 a schematic structural diagram of the second cylinder in; Figure 10 is Figure 1 a first schematic structural diagram of the seal in; Figure 11 is Figure 1The second structural schematic diagram of the middle seal; Figure 12 This is the structural schematic diagram of two writing stationery assembled together according to the present invention; Figure 13 This is the first structural schematic diagram of the rod body in the present invention; Figure 14 This is the second structural schematic diagram of the rod body in the present invention.

[0018] Reference numerals: 1. Pen barrel; 11. Positioning part; 12. Insertion part; 13. Limiting part; 14. Limiting and mating part; 15. Chamfer structure; 10. Rod body; 121. Slot; 122. Insert bar; 123. Insertion opening; 124. Extension part; 2. Refill; 21. Tip; 3. Sealing assembly; 31. Sleeve; 32. Seal; 33. Sealing ring; 311. Opening; 312. Pulling part; 313. Pushing part; 314. Limiting part; 315. Positioning and mating part; 301. First cylinder; 302. Second cylinder; 321. Sealing component; 322. First connecting component; 323. Second connecting component; 324. Flexible connecting component; 3221. Pulling and mating part; 3222. Pushing and mating part; 3223. First elastic claw; 3231. Second elastic claw; 4. Spring. Detailed implementation manners

[0019] Embodiment 1, as Figures 1 - 11 shown, the present invention provides a writing stationery, including a pen barrel 1 and a refill 2, the refill 2 is arranged in the pen barrel 1, and the tip 21 of the refill 2 extends to the outside of the pen barrel 1; The writing stationery further includes a sealing assembly 3, the sealing assembly 3 includes a sleeve 31 and a seal 32, an opening 311 is formed at one end of the sleeve 31, a flipable sealing component 321 is arranged on the seal 32, the seal 32 is located in the sleeve 31, and the sealing component is configured to open and close the opening 311; Wherein, the seal 32 is arranged outside the pen barrel 1, the sleeve 31 is sleeved outside the pen barrel 1 and can slide on the pen barrel 1; the sleeve 31 is configured to slide on the pen barrel 1 to drive the sealing component 321 to flip to open and close the opening 311.

[0020] Specifically, after the refill 2 is loaded into the pen barrel 1, the tip 21 of the refill 2 is in a state of being exposed outside the pen barrel 1. In order to meet the requirement of protecting the tip 21, a sealing assembly 3 is arranged outside the pen barrel 1. The sleeve 31 in the sealing assembly 3 will be sleeved outside the pen barrel 1, and the seal 32 is located inside the sleeve 31 and is also arranged outside the pen barrel 1.

[0021] Wherein, in a state where the sealing member 321 is turned over to close the opening 311, the tip 21 of the refill 2 is located inside the opening 311, and the tip 21 of the refill 2 is located inside the sleeve 31.

[0022] Specifically, in a non-use state, the opening 311 of the sleeve 31 is blocked by the sealing member 321 of the seal 32, so that a relatively enclosed space is formed among the sleeve 31, the sealing member 321 and the pen barrel 1, and the tip 21 of the refill 2 is located in this relatively enclosed space to obtain protection.

[0023] In addition, in a state where the sealing member 321 is turned over to open the opening 311, the tip 21 of the refill 2 is located outside the opening 311, and the sleeve 31 is away from the tip 21 of the refill 2.

[0024] Specifically, when the user needs to use it, it is opened by pulling the sleeve 31 outside the pen barrel 1. The specific process is that the sleeve 31 slides outside the pen barrel 1 in a direction away from the tip 21. During the sliding of the sleeve 31, on the one hand, the sealing member 321 will be exposed from the opening 311, and on the other hand, the exposed sealing member 321 will turn over to open the opening 311 and finally make the tip of the refill 2 protrude from the opening 311.

[0025] By arranging the sealing assembly 3 outside the pen barrel 1, the sleeve 31 is sleeved outside the pen barrel 1 and can slide outside the pen barrel 1. The sliding sleeve 31 can drive the sealing member 321 on the seal 32 to turn over, so as to open the opening 311 of the sleeve 31 to meet the requirement that the tip 21 of the tip protrudes from the opening 311 for writing use, or close the opening 311 to protect the tip 21 of the tip; during the use process, when it is necessary to open the opening 311 for use, the user pulls the sleeve 31 to make the sleeve 31 slide on the pen barrel 1, thereby driving the sealing member 321 to turn over and open the opening 311 to expose the tip 21 of the refill 2. In this way, it is possible to avoid accidentally exposing the tip 21 caused by pressing, and reduce accidental operations to improve the user experience and safety.

[0026] In one embodiment, the seal 32 includes a first connecting member 322, a second connecting member 323 and a flexible connecting member 324. The sealing member 321 is arranged between the first connecting member 322 and the second connecting member 323 through the flexible connecting member 324, and the sealing member 321 can turn over relative to the first connecting member 322 and the second connecting member 323; The sleeve 31 is provided with a pulling part 312, and the pulling part 312 is configured to pull the first connecting component 322 to slide together during the process of the sleeve 31 sliding in a direction away from the tip 21 of the refill 2, so that the sealing component 321 is exposed from the opening 311 and the opening 311 is flipped open.

[0027] Specifically, in order to drive the sealing component 321 to flip open the opening 311 when the sleeve 31 slides away from the tip 21, a pulling part 312 is provided on the inner wall of the sleeve 31. During the movement of the sleeve 31, the pulling part 312 will apply a pulling force to the first connecting component 322, so that the first connecting component 322 can move on the pen barrel 1 following the sleeve 31. During the process of the first connecting component 322 moving relative to the pen barrel 1, a relative movement will occur between the first connecting component 322 and 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.

[0028] Wherein, a protruding pulling cooperation part 3221 is provided on the outer surface of the first connecting piece, and the pulling part 312 will abut against the pulling cooperation part 3221, so that the first connecting piece slides on the pen barrel 1 following the sleeve 31.

[0029] In another embodiment, a pushing part 313 is provided on the inner wall of the sleeve 31, and the pulling part 312 is located between the pushing part 313 and the opening 311; the pushing part 313 is configured to push the first connecting component 322 to slide together during the process of the sleeve 31 sliding in a direction close to the tip 21 of the refill 2, so that the sealing component 321 flips and retracts into the opening 311 to close the opening 311.

[0030] Specifically, after the user finishes using, the sleeve 31 is pushed in the reverse direction, so that the sleeve 31 moves towards the tip 21. During the movement of the sleeve 31, the first connecting piece is pushed to move in the reverse direction through the pushing part 313, so as to realize the sliding of the first connecting piece towards the tip 21. During the sliding process, the sealing component 321 flips and resets and finally seals the opening 311 of the sleeve 31.

[0031] Similarly, a pushing cooperation part 3222 can also be configured on the first connecting piece, and the pushing part 313 abuts against the pushing cooperation part 3222 to push the first connecting piece back to its original position.

[0032] In some embodiments, in order to enable intermittent sliding of the first connecting member and the second connecting member during the reciprocating sliding of the 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 is further provided in the sleeve 31.

[0033] Specifically, when the sealing member 321 is in a state of closing the opening 311, the first elastic claw 3223 and the second elastic claw 3231 are arranged in a staggered manner along the length direction of the pen barrel 1. Among them, the first elastic claw 3223 is close to the opening 311, and the second elastic claw 3231 is far from the opening 311.

[0034] In this way, during the opening process, the sleeve 31 moves so that the first elastic claw 3223 and the second elastic claw 3231 arranged in a staggered manner sequentially cross 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 cooperation portion 3221, and the seal 32 remains basically stationary, and the sealing member 321 will be exposed from the opening 311.

[0035] As the sleeve 31 continues to move, the pulling portion 312 abuts against the pulling cooperation portion 3221. At this time, the first connecting member will follow the movement of the sleeve 31, while the second connecting member will remain stationary because the second elastic claw 3231 is stuck on the limiting portion 314. In this way, the sealing member 321 can be flipped open.

[0036] In one embodiment, for the sleeve 31, in order to facilitate the assembly of the seal 32, the sleeve 31 includes a first cylinder body 301 and a second cylinder body 302, and the first cylinder body 301 and the second cylinder body 302 are detachably connected together; The end of the first cylinder body 301 forms the opening 311, the pulling portion 312 is provided on the inner wall of the first cylinder body 301, and the pushing portion 313 is provided on the inner wall of the second cylinder body 302.

[0037] Specifically, for the convenience of assembly, the sleeve 31 adopts a split design. The pulling portion 312 is provided on the first cylinder body 301, and the pushing portion 313 is provided on the second cylinder body 302.

[0038] In one embodiment, in order to improve the sealing performance, a sealing ring 33 is further provided in the sleeve 31. The sealing ring 33 is sleeved outside the pen barrel 1 and is located between the pushing portion 313 and the seal 32.

[0039] Specifically, the opening 311 of the sleeve 31 is blocked and covered by the sealing member 321, and the airtight treatment between the sleeve 31 and the pen barrel 1 is performed through the sealing ring 33.

[0040] In one embodiment, a positioning portion 11 is provided on the pen barrel 1, and a positioning and mating portion 315 that mates with the positioning portion 11 is provided on the sleeve 31; In a state where the sealing member 321 flips open the opening 311, the positioning portion 11 is connected to the positioning and mating portion 315 to position the sleeve 31 to remain stationary at the position where the pen barrel 1 is located.

[0041] Specifically, after pulling the sleeve 31 to expose the pen tip 21, it is also necessary to position the sleeve 31 to meet the requirements of normal writing by the user. In a state where the sealing member 321 flips open the opening 311, the positioning portion 11 and the positioning and mating portion 315 are connected together to position the sleeve 31. Among them, the physical entities of the positioning portion 11 and the positioning and mating portion 315 can adopt the cooperation of a positioning rib and a positioning groove, or the positioning can be achieved by two positioning ribs abutting against each other.

[0042] In one embodiment, in order to maintain an effective closed state in a state where the sealing member 321 closes the opening 311 without being subjected to force. The writing instrument further includes a spring 4, and the spring 4 is disposed between the sleeve 31 and the pen barrel 1, and the spring 4 is configured to apply a spring force 4 in the direction of the pen tip 21 of the pen core 2 to the sleeve 31.

[0043] Specifically, in a state where the opening 311 is closed by the sealing member 321, the spring 4 will always apply an elastic force to the sleeve 31 to ensure that the sleeve 31 will not slide randomly on the pen barrel 1. When the user needs to open and use it, the sleeve 31 is pulled to overcome the elastic force of the spring 4. Among them, the spring 4 is located in the sleeve 31.

[0044] Embodiment 2, as Figure 1 、 Figures 12 - 14 shown, in one embodiment of the present application, a spliced writing instrument is provided, including a pen barrel 1 and a pen core 2, and the pen core 2 is disposed in the pen barrel 1.

[0045] In order to facilitate the user to carry different pens and switch between them, a plug-in portion 12 is provided at an end of the pen barrel 1 away from the pen tip 21 of the pen core 2; The plug-in portion 12 is configured such that the pen barrels 1 of two such writing instruments are inserted into each other from the side through the plug-in portion 12 so that the two writing instruments are connected together.

[0046] Specifically, a plug-in portion 12 is formed at the tail of the pen barrel 1. When two writing instruments need to be assembled, the tails of the two pen barrels 1 are brought closer to each other, and then they are inserted into each other from the side through the plug-in portion 12.

[0047] Since the pen barrel includes two rod bodies 10, one end of each rod body 10 is formed with a port through which the tip 21 of the pen core 2 protrudes, and the other end of each rod body 10 is provided with a plug-in portion 12; wherein, when the plug-in portions 12 of the two rod bodies 10 are plugged together, the plug-in portion 12 is configured to restrict the two rod bodies 10 from separating along the length direction of the rod body 10.

[0048] During actual use, the user can plug the two rod bodies 10 together through the plug-in portion 12 from the side wall direction of the rod body 10. And, after the two plug-in portions 12 are connected together, on the one hand, the two rod bodies 10 can be reliably connected together through the two plug-in portions 12, and on the other hand, since the two plug-in portions 12 are plugged in from the side, it can effectively prevent the two rod bodies 10 from separating and falling off along their length direction, so as to improve the use reliability.

[0049] In one embodiment, the plug-in portion 12 includes a slot 121 and a plug 122 arranged side by side.

[0050] Specifically, the slot 121 and the plug 122 are formed on the end face of the rod body 10, and the slot 121 forms an insertion opening 123 on the side wall of the rod body; after the two rod bodies are plugged together, the plug on one rod body is inserted into the corresponding slot through the insertion opening on the other rod body.

[0051] During assembly, the plug 122 of one pen barrel 1 is inserted into the slot 121 of the other pen barrel 1 to ensure that the two pen barrels 1 are firmly connected together.

[0052] In another embodiment, a limiting portion 13 is provided in the slot 121, and a limiting and cooperating portion 14 is provided on the plug 122; After the two rod bodies 10 are plugged together, the limiting portion 13 on one rod body 10 is connected to the limiting and cooperating portion 14 on the other rod body 10 to limit the two rod bodies 10 on the connection surface formed by the two rod bodies 10.

[0053] Specifically, during use, when the two rod bodies 10 are plugged together through the plug-in portion 12 and assembled in place, the limiting portion 13 and the limiting and cooperating portion 14 are connected together, and then the limiting portion 13 and the limiting and cooperating portion 14 are used in cooperation to limit the position between the two plug-in portions 12. In this way, during use, due to the limiting portion 13 and the limiting and cooperating portion 14 restricting the relative sliding of the two plug-in portions 12 along the length direction of the slot 121, the relative lateral separation of the two rod bodies 10 is reduced, thereby improving the use reliability.

[0054] In some embodiments, the manifestation entities of the limiting portion 13 and the limiting cooperation portion 14 can have various structural forms. For example: the limiting portion 13 is a first protruding portion formed in the slot 121, and the limiting cooperation portion 14 is a first recessed portion formed on the insert bar 122. Or, the limiting portion 13 is a second recessed portion formed in the slot 121, and the limiting cooperation portion 14 is a second protruding portion formed on the insert bar 122.

[0055] In another embodiment, an extension portion 124 is provided at the edge of the insert bar 122, and the extension portion 124 covers the outside of the slot 121.

[0056] Specifically, for the insert bar 122 and the slot 121 formed at the end of the rod body 10, at least two side-by-side arranged insert bars 122 that protrude can be formed on the end face of the rod body 10, and the slot 121 is formed between two adjacent insert bars 122.

[0057] In order to prevent the insert bar 122 from disengaging from the slot 121, an extension portion 124 is provided at the edge of the insert bar 122. The extension portion 124 on one rod body 10 can cooperate with the extension portion 124 on another rod body 10 to form an overlapping area, so as to limit the separation of the two rod bodies 10 in the length direction.

[0058] Furthermore, limiting ribs are provided on the bottom surface of the slot 121, and the extension portion 124 covers part of the limiting ribs; a limiting notch is provided on the insert bar 122, the opening of the limiting notch is arranged at the edge of the extension portion 124, and the area formed by the limiting notch is partially projected into the slot 121 in the length direction of the pen barrel 1, and the limiting notch is located outside the limiting ribs; the limiting ribs form the limiting portion 13, and the limiting notch forms the limiting cooperation portion 14.

[0059] Specifically, since the rod body 10 is generally made of plastic material and processed by injection molding with a mold, in this way, during the process of forming the insert bar 122, the slot 121, the limiting portion 13 and the limiting cooperation portion 14 at the end of the rod body 10, the requirements for demolding during the mold processing need to be considered.

[0060] Especially restricted by the extension portion 124 additionally configured for the insert bar 122 to prevent detachment, it will increase the difficulty of forming the limiting portion 13 in the slot 121 and the limiting cooperation portion 14 on the insert bar 122. For this reason, by forming a limiting notch on the extension portion 124 to form the limiting cooperation portion 14, the difficulty of processing the limiting cooperation portion 14 on the insert bar 122 can be reduced. At the same time, limiting ribs are provided in the slot 121 to cooperate with the limiting notch on another rod body 10 for limiting to meet the usage requirements.

[0061] In another embodiment, a chamfer structure 15 is provided at the edge of the limiting notch on the outer surface of the insert 122.

[0062] Specifically, on the one hand, the chamfer structure 15 can meet the requirement of smooth demolding of the limiting notch, and on the other hand, the chamfer structure 15 can better fit with the limiting rib.

[0063] In another embodiment, the limiting rib has an arc structure, and the edge of the limiting notch also has an arc structure; the center of the projection shape of the area formed by the limiting notch along the length direction of the pen barrel 1 coincides with the center of the limiting rib.

[0064] Specifically, after the two insertion parts 12 are inserted together, the limiting rib of one rod body 10 is stuck in the limiting notch of the other rod body 10. The limiting part 13 and the limiting cooperation part 14 between the two insertion parts 12 will form an annular limiting connection surface, so as to more effectively and stably limit the two insertion parts 12 to prevent deviation. Moreover, it can further automatically center the two rod bodies 10, so that the center lines of the two rod bodies 10 inserted together coincide, improving the use comfort.

[0065] The above are only the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A writing stationery, comprising a pen holder and a refill, wherein the refill is arranged in the pen holder, characterized in that: The pen tip of the pen core extends out of the pen holder; The writing instrument further comprises a sealing assembly, the sealing assembly comprising a sleeve and a sealing member, an opening is formed at one end of the sleeve, a reversible sealing component is arranged on the sealing member, the sealing member is located in the sleeve, and the sealing component is configured to open and close the opening; Wherein, the sealing component is arranged on the outside of the pen barrel, and the sleeve is sleeved on the outside of the pen barrel and can slide on the pen barrel; the sleeve is configured to slide on the pen barrel to drive the sealing component to flip to open and close the opening.

2. The writing instrument according to claim 1, characterized in that: When the sealing component is flipped over to open the opening, the tip of the pen core is located outside the opening, and the sleeve is away from the tip of the pen core.

3. The writing instrument according to claim 1, characterized in that: When the sealing component is flipped over to close the opening, the tip of the pen core is located inside the opening, and the tip of the pen core is located inside the sleeve.

4. The writing instrument according to claim 1, 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 sleeve is provided with a pulling portion, and the pulling portion is configured to pull the first connecting component to slide together when the sleeve slides toward the pen head away from the pen core, so that the sealing component is exposed from the opening and flipped to open the opening.

5. The writing instrument according to claim 4, characterized in that: The inner wall of the 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 sleeve slides toward the pen tip close to the pen core so that the sealing component flips over and retracts into the opening to close the opening.

6. The writing instrument according to claim 5, characterized in that: The sleeve comprises a first cylinder and a second cylinder, wherein the first cylinder and the second cylinder are detachably connected together; The opening is formed at the end of the first cylinder, the pulling portion is provided on the inner wall of the first cylinder, and the pushing portion is provided on the inner wall of the second cylinder.

7. The writing instrument according to claim 5, characterized in that: A sealing ring is also arranged in the sleeve, and the sealing ring is sleeved on the outside of the pen shaft and is located between the pushing part and the sealing member.

8. The writing instrument according to any one of claims 1 to 7, characterized in that: It also includes a spring, which is arranged between the sleeve and the pen barrel, and is configured to apply a spring force to the sleeve in the direction of the pen tip of the pen core.

9. The writing instrument according to any one of claims 1 to 7, characterized in that: The pen holder comprises a first rod body and a second rod body, and the first rod body and the second rod body are detachably connected together; The pen core is inserted into the first rod body, the pen tip of the pen core extends out of the first rod body, and the second rod body is sleeved on the outside of the pen core.

10. The writing instrument according to any one of claims 1 to 7, characterized in that: The end of the pen shaft away from the pen tip of the pen core is provided with an inserting portion; The plug-in portion is configured so that the penholders of the two writing instruments are plugged into each other from the side through the plug-in portion so that the two writing instruments are connected together.

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