A retractable pen

Abstract

This invention discloses a telescopic fountain pen, comprising a pen tip, a feed, a pen neck, a pen barrel, a pen cap, an ink reservoir, and a sealing bushing. The pen cap is slidably fitted onto the front end of the pen barrel, and the front end of the pen cap has a pen tip hole for the pen tip to extend out. The pen neck is disposed within the pen cap, and the rear end of the pen neck is detachably connected to the front end of the pen barrel. The ink reservoir is disposed within the pen barrel, and the front end of the ink reservoir is detachably connected to the rear end of the pen neck. The feed is inserted into the pen neck, and the front end of the feed extends out of the pen neck and connects to the pen tip. The pen neck has an ink inlet channel for injecting ink from the ink reservoir into the feed. The sealing bushing is fixed within the pen cap, and the sealing bushing is fitted around the outer periphery of the pen neck, with a dynamic sealing structure between the sealing bushing and the pen neck. The front end of the sealing bushing is a closed end, and the closed end has a self-closing slit for repeated insertion of the pen tip. A lower limit structure and an upper limit structure are provided between the pen cap and the pen neck. Using this invention, the problems of ink drying at the pen tip and uneven ink flow can be solved.

Description

Technical Field

[0001] This invention pertains to writing instruments, specifically to a retractable fountain pen. Background Technology

[0002] A fountain pen is a writing instrument primarily made of metal. It is an important writing tool. Current retractable fountain pens use a push-button retraction mechanism. Before use, the nib is pushed out, and then writing can begin directly. When not in use, the nib retracts into the pen. However, since the nib is still exposed to the air, ink often dries and solidifies on the nib after prolonged periods of disuse, clogging the ink outlet and resulting in uneven ink flow, affecting the user experience. In this case, users usually try wiping the nib with a tissue to remove the dried ink. If ink still does not flow, they need to gently shake the pen or squeeze the ink cartridge to allow the ink in the cartridge to flow to the nib. However, in this process, ink is often splashed out of the pen, causing stains on clothing or desktops, affecting subsequent use. Summary of the Invention

[0003] The purpose of this invention is to provide a retractable fountain pen that can solve the problem of ink drying out at the pen tip and uneven ink flow.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A retractable fountain pen includes a nib, a feed, a neck, a barrel, a cap, an ink reservoir, and a sealing bushing. The cap is slidably fitted onto the front end of the barrel, and the front end of the cap has a nib hole for the nib to extend out. The neck is disposed within the cap, and the rear end of the neck is detachably connected to the front end of the barrel. The ink reservoir is disposed within the barrel, and the front end of the ink reservoir is detachably connected to the rear end of the neck. The feed is inserted into the neck, and the front end of the feed extends out of the neck and connects to the nib. The neck has a mechanism for injecting ink from the ink reservoir into the neck. The ink inlet channel of the pen feed; the sealing bushing is fixed inside the pen cap, the sealing bushing is sleeved on the outer periphery of the pen tip and a dynamic sealing structure is provided between the sealing bushing and the pen tip; the front end of the sealing bushing is a closed end, and the closed end has a self-closing slit that allows the pen tip to be repeatedly inserted; the pen cap and the pen tip are provided with a lower limit structure and an upper limit structure. When the lower limit structure limits and fixes the pen cap and the pen tip, the pen tip retracts into the sealing bushing; when the upper limit structure limits and fixes the pen cap and the pen tip, the pen tip passes through the sealing bushing and extends outside the pen cap.

[0006] As a preferred embodiment of the present invention, the closed end is provided with an inwardly recessed arc groove, and the self-closing cut is formed on the arc groove.

[0007] As a preferred embodiment of the present invention, the pen cap includes a cap head and a cap body, wherein the cap head and the cap body are detachably connected.

[0008] As a preferred embodiment of the present invention, after the cap head is connected to the cap body, an annular clamp for fixing the sealing bushing is formed, and the outer periphery of the sealing bushing is provided with an annular boss that matches the clamp.

[0009] As a preferred embodiment of the present invention, the end of the cap is formed with a protective cover that matches the shape of the pen tip, and the pen tip hole is opened on the protective cover; the pen cap is connected to a pen clip, and the pen clip is located on the back side of the pen tip.

[0010] As a preferred embodiment of the present invention, the outer periphery of the sealing bushing is provided with an annular rib that abuts against the inner wall of the pen cap.

[0011] As a preferred embodiment of the present invention, the lower limit structure includes a first lower limit buckle and a second lower limit buckle that are interlocked with each other, the first lower limit buckle being fixed to the outer periphery of the pen tip, and the second lower limit buckle being fixed to the inner wall of the pen cap; the upper limit structure includes a first upper limit buckle and a second upper limit buckle that are interlocked with each other, the first upper limit buckle being fixed to the outer periphery of the pen tip, and the second upper limit buckle being fixed to the inner wall of the pen cap.

[0012] As a preferred embodiment of the present invention, the rear end of the ink reservoir is provided with a silicone plug that can be repeatedly punctured for ink refilling; the rear end of the pen barrel is provided with a puncture hole opposite to the silicone plug.

[0013] As a preferred embodiment of the present invention, the pen feed is provided with an axially extending water-guiding part, which passes through the ink inlet channel and forms a water-guiding flow channel between itself and the inner wall of the ink inlet channel.

[0014] As a preferred embodiment of the present invention, the inner wall of the ink reservoir is symmetrically provided with two radially protruding and axially extending drainage ribs, and a water channel is formed between the two drainage ribs.

[0015] The advantages of implementing the telescopic pen provided by this invention compared with the prior art are as follows:

[0016] When in use, push the pen cap towards the pen barrel until the upper limit structure secures the pen cap and pen tip. At this point, the pen tip will pass through the elastic seal and extend from the pen tip hole to the outside of the pen cap, allowing you to begin writing. The structure is simple and easy to use. When not in use, push the pen cap away from the pen barrel until the lower limit structure secures the pen cap and pen tip. At this point, the pen tip will retract into the sealing bushing, placing it in a sealed cavity to isolate it from outside air and prevent it from drying out, thus ensuring smooth ink flow the next time you use it. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0018] Figure 1 This is a schematic diagram of the retractable pen in an idle state according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the retractable pen in use according to an embodiment of the present invention;

[0020] Figure 3 It is at Figure 1 A partial enlarged view of the lower limit structure in the structure shown;

[0021] Figure 4 It is at Figure 2 A magnified view of the upper limit structure in the structure shown.

[0022] Marked in the image:

[0023] 1. Pen tip; 2. Pen feed; 3. Pen neck; 4. Pen cap; 5. Ink reservoir; 6. Sealing bushing; 7. Pen tip hole; 8. Ink inlet channel; 9. Dynamic sealing structure; 10. Closed end; 11. Lower limit structure; 12. Upper limit structure; 13. Arc groove; 14. Annular clamp; 15. Annular boss; 16. Annular rib; 17. Protective cover; 18. Pen clip; 19. First lower limit buckle; 20. Second lower limit buckle; 21. First upper limit buckle; 22. Second upper limit buckle; 23. Silicone plug; 24. Puncture hole; 25. Inlet section; 26. Inlet channel; 27. Inlet rib; 28. Inlet groove; 29. Detailed Implementation

[0024] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0026] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0027] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0028] Please refer to the following: Figures 1 to 4 The telescopic pen provided in the embodiments of the present invention will now be described.

[0029] like Figure 1 and Figure 2 As shown, the telescopic pen of this embodiment includes a pen tip 1, a feed 2, a pen neck 3, a pen barrel 4, a pen cap 5, an ink reservoir 6, and a sealing bushing 7. The pen cap 5 is slidably fitted onto the front end of the pen barrel 4, and the front end of the pen cap 5 has a pen tip hole 8 for the pen tip 1 to extend out. The pen neck 3 is disposed inside the pen cap 5, and the rear end of the pen neck 3 is detachably connected to the front end of the pen barrel 4. The ink reservoir 6 is disposed inside the pen barrel 4, and the front end of the ink reservoir 6 is detachably connected to the rear end of the pen neck 3. The feed 2 is inserted into the pen neck 3, and the front end of the feed 2 extends out of the pen neck 3 and connects to the pen tip 1. The pen neck 3 has a function to inject ink from the ink reservoir 6 into the pen neck 4. The ink inlet channel 9 of the pen feed 2; the sealing bushing 7 is fixed inside the pen cap 5, the sealing bushing 7 is sleeved on the outer periphery of the pen tip 3 and a dynamic sealing structure 10 is provided between the sealing bushing 7 and the pen tip 3; the front end of the sealing bushing 7 is a closed end 11, the closed end 11 is provided with a self-closing slit that allows the pen tip 1 to be repeatedly inserted; a lower limiting structure 12 and an upper limiting structure 13 are provided between the pen cap 5 and the pen tip 3. When the lower limiting structure 12 limits and fixes the pen cap 5 and the pen tip 3, the pen tip 1 retracts into the sealing bushing 7; when the upper limiting structure 13 limits and fixes the pen cap 5 and the pen tip 3, the pen tip 1 extends through the sealing bushing 7 to the outside of the pen cap 5.

[0030] According to an embodiment of the present invention, when using the telescopic pen, the pen cap 5 is pushed down, and the upper limit structure 13 fixes the pen cap 5 and the pen head 3. At this time, the pen tip 1 extends through the elastic seal and out of the pen tip 1 hole to the outside of the pen cap 5, and the writing action can begin. The structure is simple and convenient to assemble and use. When not in use, the pen cap 5 is pulled up, and the lower limit structure 12 fixes the pen cap 5 and the pen head 3. At this time, the pen tip 1 retracts into the sealing bushing 7. The sealing bushing 7 isolates the inside and outside of the pen head 3 to form a sealed cavity, so that the pen head 3 and the ink reservoir 6 maintain pressure balance. This not only prevents the pen tip 1 from drying out, but also ensures smooth ink flow when used again.

[0031] For example, the sealing bushing 7 is preferably made of silicone.

[0032] For example, such as Figure 1 and Figure 2 As shown, considering that increased ambient temperature and shaking during transport can cause increased internal pressure in the ink reservoir 6, leading to ink leakage, the closed end 11 is provided with an inwardly recessed arc groove 14 to solve this problem. The self-closing cut is made on the arc groove 14. Therefore, the arc groove 14 can provide a certain tension, ensuring pressure balance inside and outside the pen tip 3, effectively preventing excessive internal pressure in the ink reservoir 6 from causing ink leakage.

[0033] For example, such as Figure 1 and Figure 2 As shown, to facilitate the assembly of the sealing bushing 7, the pen cap 5 includes a cap head and a cap body, with the cap head and cap body detachably connected. Specifically, the cap head and cap body are threaded together, forming an annular clamp 15 for fixing the sealing bushing 7 after connection. The outer periphery of the sealing bushing 7 has an annular boss 16 that matches the clamp. Furthermore, the outer periphery of the sealing bushing 7 has an annular rib 17 that abuts against the inner wall of the pen cap 5. This structure reduces the friction between the outer periphery of the sealing bushing 7 and the inner wall of the pen cap 5, allowing the sealing bushing 7 to be smoothly inserted into the pen cap 5 for easy pre-installation. Simultaneously, after the cap head and cap body are connected, the annular clamp 15 can hold the annular boss 16, thus fixing the sealing bushing 7.

[0034] For example, such as Figure 1 and Figure 2 As shown, the end of the cap 5 has a protective cover 18 that matches the shape of the pen tip 1, and the pen tip hole 8 is formed on the protective cover 18; the pen cap 5 is connected to a pen clip 19, which is located on the back side of the pen tip 1. Thus, the protective cover 18 can protect the pen tip 1, and at the same time, placing the pen clip 19 on the back side of the pen tip 1 prevents it from affecting writing in case of incorrect use, thereby correcting the pen-holding gesture.

[0035] For example, such as Figure 3 and Figure 4 As shown, the lower limit structure 12 includes a first lower limit buckle 20 and a second lower limit buckle 21 that are interlocked. The first lower limit buckle 20 is fixed to the outer periphery of the pen tip 3, and the second lower limit buckle 21 is fixed to the inner wall of the pen cap 5. The upper limit structure 13 includes a first upper limit buckle 22 and a second upper limit buckle 23 that are interlocked. The first upper limit buckle 22 is fixed to the outer periphery of the pen tip 3, and the second upper limit buckle 23 is fixed to the inner wall of the pen cap 5. When the limit buckles are interlocked, a "click" sound is produced, which allows the user to determine whether the buckles are fixed in place, effectively preventing the pen cap 5 and pen tip 3 from becoming loose and affecting writing, thus facilitating use.

[0036] For example, such as Figure 1 and Figure 2 As shown, in order to facilitate ink filling of ink bottles (such as Chinese invention patents: CN201510585566.X, CN201510587210.X, CN201510585795.1, etc.), the rear end of the ink reservoir 6 is provided with a silicone plug 24 that can be repeatedly punctured for ink filling; the rear end of the pen barrel 4 is provided with a puncture hole 25 opposite to the silicone plug 24.

[0037] For example, such as Figure 1 and Figure 2 As shown, the pen feed 2 is provided with an axially extending water-guiding part 26, which passes through the ink inlet channel 9 and forms a water flow channel 27 between itself and the inner wall of the ink inlet channel 9. This design enables gas-liquid separation during ink delivery, allowing ink to flow smoothly from the ink reservoir 6 to the pen tip 1, effectively preventing ink interruption during writing.

[0038] For example, such as Figure 1 and Figure 2 As shown, the inner wall of the ink reservoir 6 is symmetrically provided with two radially protruding and axially extending guiding ribs 28, and a water channel 29 is formed between the two guiding ribs 28. This design enables gas-liquid separation during the ink filling process, effectively preventing the ink in the ink reservoir 6 from separating and breaking, and ensuring that the ink smoothly fills the ink reservoir 6.

[0039] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A telescopic fountain pen, characterized in that, The pen includes a pen tip, a feed, a pen neck, a pen barrel, a pen cap, an ink reservoir, and a sealing bushing. The pen cap is slidably fitted onto the front end of the pen barrel, and the front end of the pen cap has a pen tip hole for the pen tip to extend out. The pen neck is disposed within the pen cap, and the rear end of the pen neck is detachably connected to the front end of the pen barrel. The ink reservoir is disposed within the pen barrel, and the front end of the ink reservoir is detachably connected to the rear end of the pen neck. The pen feed is inserted into the pen neck, and the front end of the pen feed extends out of the pen neck and connects to the pen tip. The pen neck has an ink inlet channel for injecting ink from the ink reservoir into the pen feed. The sealing bushing is fixed to the pen... Inside the cap, the sealing bushing is fitted around the outer periphery of the pen tip and has a dynamic sealing structure between it and the pen tip; the front end of the sealing bushing is a closed end, and the closed end has a self-closing slit that allows the pen tip to be repeatedly inserted; the closed end has an inwardly recessed arc groove, and the self-closing slit is formed on the arc groove; a lower limiting structure and an upper limiting structure are provided between the pen cap and the pen tip; when the lower limiting structure limits and fixes the pen cap and the pen tip, the pen tip retracts into the sealing bushing; when the upper limiting structure limits and fixes the pen cap and the pen tip, the pen tip passes through the sealing bushing and extends outside the pen cap.

2. The telescopic pen according to claim 1, characterized in that, The pen cap includes a cap head and a cap body, and the cap head and the cap body are detachably connected.

3. The telescopic pen according to claim 2, characterized in that, After the cap head is connected to the cap body, an annular clamp is formed for fixing the sealing bushing, and the outer periphery of the sealing bushing is provided with an annular boss that matches the clamp.

4. The telescopic pen according to claim 2, characterized in that, The end of the cap has a protective cover that matches the shape of the pen tip, and the pen tip hole is opened on the protective cover; the pen cap is connected to a pen clip, which is located on the back side of the pen tip.

5. The telescopic pen according to claim 1, characterized in that, The outer periphery of the sealing bushing is provided with an annular rib that abuts against the inner wall of the pen cap.

6. The telescopic pen according to claim 1, characterized in that, The lower limit structure includes a first lower limit buckle and a second lower limit buckle that are interlocked with each other. The first lower limit buckle is fixed to the outer periphery of the pen tip, and the second lower limit buckle is fixed to the inner wall of the pen cap. The upper limit structure includes a first upper limit buckle and a second upper limit buckle that are interlocked with each other. The first upper limit buckle is fixed to the outer periphery of the pen tip, and the second upper limit buckle is fixed to the inner wall of the pen cap.

7. The telescopic pen according to claim 1, characterized in that, The ink reservoir has a silicone plug at its rear end that can be repeatedly punctured for ink refilling; the pen barrel has a puncture hole at its rear end that is opposite to the silicone plug.

8. The telescopic pen according to claim 1, characterized in that, The pen feed is provided with an axially extending water guide, which passes through the ink inlet channel and forms a water flow channel between itself and the inner wall of the ink inlet channel.

9. The telescopic pen according to claim 1, characterized in that, The inner wall of the ink reservoir is symmetrically provided with two radially protruding and axially extending drainage ribs, and a water channel is formed between the two drainage ribs.

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