Open-type air-pressurized refill and pen

Abstract

An open-type air-pressurized refill and a pen. The open-type air-pressurized refill comprises a refill tube (1) filled with ink, and further comprises an elastic probe valve assembly (2) movably and telescopically arranged at the head of the refill tube (1) and used for opening / closing the head of the refill tube (1), so that the ink flows out or is blocked; and an elastic air compression assembly (3) arranged at the tail of the refill tube (1). When the head of the refill tube (1) is opened, the elastic air compression assembly (3) compresses itself to outwardly press the ink inside the refill tube (1). A capillary guide hole (4) runs through a side wall of the refill tube (1) and / or the elastic air compression assembly (3), and the diameter of the capillary guide hole (4) is smaller than the cross-sectional area of an internal cavity of the refill tube (1). When the refill tube (1) is closed, the elastic air compression assembly (3) returns from a compressed state to a natural shape by means of the capillary guide hole (4).

Description

An open-type air-pressurized pen refill and pen tool

[0001] This application claims priority to Chinese Patent Application No. 202421846385.9, filed on July 31, 2024, entitled "An Open-Type Air-Pressurized Pen Refill and Pen Tool", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of writing and drawing tools, and in particular to an open-type air-pressurized pen refill and pen tool. Background Technology

[0003] Ink pens are tools that use oil-based ink for writing and drawing. They are commonly used in artistic creation, education and office work, and professional drawing. With the development of technology and the expansion of the creative industries, users' demand for ink pens has gradually increased. Ink pens still maintain an irreplaceable importance in many fields and have great development prospects.

[0004] Currently, there are pens using high-viscosity special inks in existing technologies, such as jelly pens, paint pens, and correction pens. Different types of pens play important roles under different usage conditions. However, because high-viscosity inks have poor fluidity, the pen bodies of such ink pens are usually made of soft plastic, and the ink is squeezed out by pressing the pen body. There are many similar structures. For example, Chinese invention patent CN106313940A discloses a pen refill with high ink utilization rate. In this refill, the air pressure inside the refill is increased by pressing a simple air compression structure, which pushes the remaining ink inside the refill to continue to flow out, so as to make full use of the ink inside the pen refill.

[0005] However, this type of structure that squeezes ink out of the pen body has the problem of poor controllability, mainly in that it is not easy to control the amount of ink dispensed during squeezing, which limits its application in painting and writing. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0006] This application provides an open-type air-pressurized pen refill and pen tool to solve the problem of uncontrollable ink output.

[0007] Firstly, this application provides the following technical solution:

[0008] An open-type air-pressurized pen refill includes a refill tube filled with ink, a flexible probe valve assembly movably telescopically disposed at the head of the refill tube for opening and closing the head of the refill tube to allow ink to flow out or block ink; and a flexible air compression assembly disposed at the tail of the refill tube. When the head of the refill tube is open, the flexible air compression assembly compresses itself to force the ink inside the refill tube outward. Capillary guide holes are provided through the sidewall of the refill tube and / or the flexible air compression assembly. The diameter of the capillary guide holes is smaller than the cross-sectional area of ​​the inner cavity of the refill tube. When the refill tube is closed, the flexible air compression assembly returns to its natural shape from a compressed state through the capillary guide holes.

[0009] Preferably, the number of capillary guide holes arranged on the side wall of the pen refill tube and / or the elastic air compression assembly is multiple.

[0010] Preferably, the diameter of the capillary guide hole is 0.18 mm to 0.22 mm.

[0011] Preferably, the elastic probe valve assembly includes a needle valve, the size of which is adapted to the opening at the end of the pen refill tube, and slidably disposed within the pen refill tube; and a first elastic element, disposed within the pen refill tube, with its two ends respectively connected to the pen refill tube and the needle valve, which, in its natural state, drives the needle valve to block the end opening of the pen refill tube.

[0012] Preferably, the elastic air compression component is an airbag, which is fixedly sleeved on the tail of the pen refill tube.

[0013] Preferably, the outer periphery of the tail of the pen refill tube is provided with an overlapping recess, and the airbag is sleeved on the overlapping recess.

[0014] Preferably, the elastic air compression assembly includes a piston slidably disposed at the tail end of the pen refill tube; and a second elastic member, with its two ends respectively connected to the pen refill tube and the piston. In its natural state, the second elastic member drives the piston to block the opening at the tail end of the pen refill tube.

[0015] Preferably, the pen refill tube includes a tube body for storing ink, the elastic air compression assembly being disposed at one end of the tube body; and a pen tip having an ink outlet channel communicating with the inner cavity of the tube body, the elastic probe valve assembly being movably disposed at the pen tip, the other end of the tube body having a first annular fastening portion, and one end of the pen tip having a second annular fastening portion that is sealed and fastened to the first annular fastening portion.

[0016] Secondly, this application provides the following technical solution:

[0017] A pen includes a pen refill and a pen holder, wherein the pressurized pen refill is movably sleeved inside the pen holder, and when the elastic probe valve assembly is compressed and the head of the pen refill tube is opened, the pen holder compresses the elastic air compression assembly.

[0018] Preferably, the pen holder has a through-hole for ventilation.

[0019] Compared with the prior art, this application includes at least one of the following beneficial effects: When the open-type air-pressurized pen refill is in use, the user holds the pen and presses the pen tip against the paper. When the probe of the elastic probe valve at the head of the pen refill tube touches the paper or canvas, it retracts and opens the valve to release ink. At the same time, the elastic air compression component compresses and forms extrusion pressure inside the pen refill tube. At this time, because the diameter of the capillary guide hole is smaller than the cross-sectional area of ​​the inner cavity of the pen refill tube, most of the pressure will act on the ink, causing the ink to flow out under pressure. When the pen is lifted, the elastic probe valve at the pen tip rebounds under the action of the internal spring, closing the valve and immediately blocking the ink flow. The action is rapid. Under this condition, air flows back into the pen refill tube through the capillary guide hole, causing the elastic air compression component to reset, so that the next ink squeezing action can have sufficient air pressure, and the ink dispensing force is uniform after multiple times, which can achieve quick and precise control of the ink dispensing volume. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the structure of the open-type air-pressurized pen refill provided in Embodiment 1 of this application;

[0022] Figure 2 is a schematic diagram of the structure of the open-type air-pressurized pen refill provided in Embodiment 1 of this application under pressure and ink dispensing conditions.

[0023] Figure 3 is a schematic diagram of the structure of the open air-pressurized pen refill provided in Embodiment 1 of this application in the state where the ink has been dispensed and air flows into the pen refill.

[0024] Figure 4 is a schematic diagram of the structure of the open-type air-pressurized pen refill provided in Embodiment 2 of this application;

[0025] Figure 5 is a schematic diagram of the structure of the open-type air-pressurized pen refill provided in Embodiment 3 of this application under pressure and ink dispensing conditions.

[0026] Figure 6 is a schematic diagram of the structure of the open air-pressurized pen refill provided in Embodiment 3 of this application in the state where the ink has been dispensed and air flows into the pen refill.

[0027] Figure 7 is a schematic diagram of the structure of the open-type air-pressurized pen refill provided in Embodiment 4 of this application;

[0028] Figure 8 is a structural schematic diagram of a pen provided in Embodiment 5 of this application.

[0029] Reference numerals: 1. Pen tip tube; 11. Tube body; 111. First annular fastening part; 112. Overlapping recess; 12. Pen tip; 121. Second annular fastening part; 2. Elastic probe valve assembly; 21. Needle valve; 22. First elastic element; 3. Elastic air compression assembly; 31. Airbag element; 32. Piston element; 33. Second elastic element; 4. Capillary guide hole; 5. Pen base; 51. Vent hole. Detailed Implementation

[0030] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be understood that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may have a component that is centrally positioned. When a component is considered to be "set" on another component, it can be directly set on the other component or may have a component that is centrally positioned.

[0032] The technical solution of this application will be further described below with reference to Figures 1-8 and specific embodiments.

[0033] Example 1:

[0034] Please refer to Figure 1. This embodiment provides an open-type air-pressurized pen refill. The pen refill structure mainly includes a pen refill tube 1, an elastic probe valve assembly 2, and an elastic air compression assembly 3. The pen refill tube 1 is mainly used to store ink. It has a liquid storage cavity that runs through both ends. For ease of explanation, one end is defined as the head and the other end as the tail. The elastic probe valve assembly 2 is located at the head of the pen refill tube 1 and is mainly used to open and close the head of the pen refill tube 1 to allow ink to flow out or to block ink. The elastic air compression assembly 3 is located at the tail of the pen refill tube 1. When the head of the pen refill tube 1 is open, the elastic air compression assembly 3 is used to compress itself to apply pressure to the inside of the pen refill tube 1, thereby pressurizing the ink inside the pen refill tube 1.

[0035] Specifically, in order to store ink, the pen refill tube 1 mainly includes a tube body 11 and a pen tip 12. The tube body 11 can be made of plastic. Because the plastic tube body 11 has a relatively smooth surface, it can not only store oil-based ink, but also reduce the friction between the ink and the tube wall during the ink flow, which is beneficial to the ink dispensing.

[0036] In addition, the pen tip 12 can be a metal pen tip 12 structure. The metal pen tip 12 also has a needle-like structure, and the pen tip 12 has an ink outlet channel that runs through both ends. The metal pen tip 12 has good hardness so that the writing action can be carried out stably. In other embodiments, other hard materials can also be used to replace the metal material, and no specific restrictions are made here.

[0037] When installing the pen tip 12, the elastic air compression assembly 3 is first placed at one end of the tube body 11, and the other end of the tube body 11 is used to install the pen tip 12. To improve the connection stability between the pen tip 12 and the tube body 11, a first annular fastening part 111 is provided on the inner wall of the other end of the tube body 11. Preferably, the first annular fastening part 111 has a stepped structure in this embodiment. Simultaneously, a second annular fastening part 121 is provided at one end of the pen tip 12. The shape of the second annular fastening part 121 matches that of the first annular fastening part 111; that is, the second annular fastening part 121 also has a stepped structure in this embodiment.

[0038] Here, by pressing one end of the pen tip 12 with the second annular fastening part 121 into one end of the tube body 11 with the first annular fastening part 111, the first annular fastening part 111 and the second annular fastening part 121 are sealed and fastened together, realizing the mutual installation between the pen tip 12 and the tube body 11. The structure has excellent sealing performance and is not easy to leak ink.

[0039] It should be noted that in other embodiments, the pen tip 12 and the tube body 11 can also be assembled by threaded connection or direct interference fit. Any method that can achieve a fixed connection between the two can be used, and the specific connection method is not limited here. Furthermore, based on the above configuration, the ink outlet channel of the pen tip 12 is connected to the inner cavity of the tube body 11; furthermore, the elastic probe valve assembly 2 is movably disposed at the pen tip 12 to block the ink outlet channel, thereby controlling the opening and closing of the pen tip opening.

[0040] Referring again to Figure 1, specifically, the elastic probe valve assembly 2 is movably telescopically disposed at the head of the pen refill tube 1. The elastic probe valve assembly 2 mainly includes a needle valve 21 and a first elastic element 22, wherein the outer edge dimension of the needle valve 21 is adapted to the opening dimension of the end of the pen refill tube 1, the needle valve 21 is located inside the pen refill tube 1, and slides in cooperation with the pen refill tube 1.

[0041] In this embodiment, the first elastic element 22 adopts a spring structure. The first elastic element 22 is located inside the pen refill tube 1, and its two ends are respectively connected to the pen tip 12 and the needle valve 21. In this embodiment, in order to facilitate the support of the first elastic element 22, the pen tip 12 at the end away from the needle valve 21 can be set as a constricted profile, and its inner wall can support one end of the first elastic element 22 so that the first elastic element 22 can apply an elastic thrust to the needle valve 21. At this time, when the first elastic element 22 is not subjected to external force, that is, when the needle valve 21 is in its natural state, the needle valve 21 blocks the end opening of the pen refill tube 1 to prevent ink from flowing out. Conversely, if the pen refill is pressed against the paper, the needle valve 21 contacts the paper and retracts, and the first elastic element 22 is compressed. The needle valve 21 opens the port of the pen refill tube 1 to facilitate the flow of ink.

[0042] Referring again to Figure 1, with the end of the pen refill tube 1 open, the ink is pressurized by the elastic air compression assembly 3 to facilitate ink flow. However, before this, in order to balance the atmospheric pressure inside the pen refill tube 1, a capillary guide hole 4 is provided through the side wall of the pen refill tube 1 in this embodiment. The capillary guide hole 4 is located in the tail area of ​​the pen refill tube 1, and the diameter of the capillary guide hole 4 should be smaller than the cross-sectional area of ​​the inner cavity of the pen refill tube 1.

[0043] The purpose of the above configuration is that, during the compression process of the elastic air compression component 3, according to the principle of aerodynamics, most of the air will be pressed towards the ink area, while a small portion of the air will flow out from the capillary guide hole 4, so as to achieve the purpose of pressurized ink dispensing; then, after the ink dispensing action is completed, the capillary guide hole 4 can guide the air outside the pen refill to flow back into the pen refill tube 1, so that the elastic air compression component 3 can automatically reset from the compressed state to its natural shape, so as to achieve pressurized ink dispensing again.

[0044] Furthermore, the diameter of the capillary guide hole 4 is between 0.18 mm and 0.22 mm, for example, it can be 0.18 mm, 0.2 mm, or 0.22 mm, preferably 0.2 mm. Experiments show that when the diameter of the capillary guide hole 4 is less than 0.18 mm, it may affect the gas backflow, resulting in a slow recovery speed; if the diameter of the capillary guide hole 4 is greater than 0.22 mm, it may cause the airflow velocity to be too fast, resulting in insufficient pressure exerted on the ink by the elastic air compression component 3, affecting the ink dispensing effect. Therefore, setting the diameter of the capillary guide hole 4 between 0.18 mm and 0.22 mm yields the best results.

[0045] Furthermore, the number of capillary guide holes 4 can be multiple, such as two, three or four. Here, by setting the number of capillary guide holes 4 to multiple, it is beneficial to improve the uniformity of gas flow and the air intake. Compared with some pen refill tubes 1 with larger cross-sections, it can effectively improve the airflow exchange efficiency.

[0046] Further referring to Figure 1, in order to apply pressure to the ink dispensing process, in this embodiment, the elastic air compression assembly 3 is selected as an airbag 31. The airbag 31 can be made of an elastic material such as rubber or silicone, and the specific material is not limited here. Furthermore, the airbag 31 has a sleeve-like structure, with a sleeve interface on one side for installation. The airbag 31 is sleeved and fixed to the tail of the pen refill tube 1 through the sleeve interface. At this time, by pressing the airbag 31, pressure can be applied to the ink.

[0047] Meanwhile, to improve the installation stability of the airbag component 31, the outer periphery of the tail of the pen refill tube 1 has a constricted structure. In this area, an overlapping recess 112 is formed, and the edge of the airbag component 31 fits into the overlapping recess 112. Here, the overlapping recess 112 provides positioning for the airbag component 31, preventing it from being installed too deeply or too shallowly, ensuring a proper installation position, and resulting in better performance of the airbag component 31.

[0048] The implementation principle of Embodiment 1 of this application is as follows: Referring to Figure 2, the elastic probe valve assembly 2 can open the port of the pen refill under pressure. Then, under the pressure of the elastic air compression assembly 3, the ink can flow out evenly and the ink output effect is good. Subsequently, referring to Figure 3, after the ink output action is completed, the pen refill leaves the drawing carrier, and the elastic probe valve assembly 2 quickly closes the end of the pen refill to achieve the effect of quickly controlling the ink output. At the same time, the capillary guide hole 4 can replenish the outside air into the pen refill tube 1, so that the air bladder will rebound and provide a stable ink output pressure for the next ink output action.

[0049] Example 2:

[0050] Referring to Figure 4, based on Embodiment 1, features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is that the capillary guide hole 4 is located on the airbag component 31. Through the above arrangement, the function of gas flow can also be achieved, and the airbag component 31 can also achieve the rebound effect.

[0051] In other embodiments, capillary guide holes 4 can also be provided through the side wall of the pen core tube 1 and the air bladder 31. This arrangement can also make the air bladder 31 rebound. No matter how the position of the capillary guide holes 4 is adjusted and combined, any method that can provide a rebound effect to the air bladder 31 can be tried and should be included in the interpretation of the scope of protection.

[0052] The implementation principle of Embodiment 2 of this application is as follows: by changing the setting position and combination of the capillary guide hole 4, the same gas flow effect can be achieved, so as to achieve the purpose of driving the airbag component 31 to rebound.

[0053] Example 3:

[0054] Based on Embodiment 1, features not explained in this embodiment will be explained using the methods in Embodiment 1, and will not be repeated here. The difference between this embodiment and Embodiment 1 is that the structure of the elastic air compression component 3 is different.

[0055] Referring to Figures 5 and 6, specifically in this embodiment, the elastic air compression assembly 3 includes a piston 32 and a second elastic element 33. The piston 32 mainly includes a plug body and a plug rod fixedly connected to one end of the plug body. The plug body seals and fills the opening at the tail end of the pen refill tube 1, and the plug rod extends outwards. At this time, by pressing the plug rod, the plug body can be driven to move into the pen refill tube 1, thereby applying pressure to the ink.

[0056] Meanwhile, in this embodiment, the second elastic element 33 adopts a spring structure. The two ends of the second elastic element 33 are fixedly connected to the pen refill tube 1 and the piston element 32, respectively. At this time, the second elastic element 33 can provide pressure away from the ink to the stopper, so that the stopper can achieve self-resetting action. In the natural state, the second elastic element 33 drives the piston element 32 to block the opening at the tail end of the pen refill tube 1 to ensure that the piston element 32 has enough stroke to apply pressure to the ink.

[0057] The implementation principle of Embodiment 3 of this application is as follows: by setting the piston 32 and the second elastic element 33, the same technical effect of pressurizing the gas can be achieved.

[0058] Example 4:

[0059] Referring to Figure 7, based on Embodiment 3, features not explained in this embodiment are explained using the methods described in Embodiment 3, and will not be repeated here. The difference between this embodiment and Embodiment 3 is that the capillary guide hole 4 is located on the piston 32. Through the above arrangement, the function of gas flow can also be achieved, and the piston 32 can also achieve the reset effect.

[0060] In other embodiments, capillary guide holes 4 can also be provided through the side wall of the pen core tube 1 and the piston 32 respectively. This arrangement can also reset the piston 32. No matter how the position and combination of the capillary guide holes are adjusted, any method that can achieve the reset effect of the piston 32 can be tried and should be included in the interpretation of the protection scope.

[0061] The implementation principle of Embodiment 2 of this application is as follows: by changing the setting position and combination method of the capillary guide hole 4, the same gas flow effect can be achieved, so as to achieve the purpose of driving the piston 32 to reset.

[0062] Example 5:

[0063] Referring to Figure 8, this embodiment provides a pen, applicable to the pen refill structures in embodiments one to four. In this embodiment, an airbag structure is used as an example. The pen includes a pen refill and a pen holder 5. The pen holder 5 has a shell-like structure with one end open, and its internal dimensions are adapted to the pen refill. At this time, the pen refill can be movably fitted inside the pen holder 5. The pen refill and the pen holder 5 can be displaced alternately along the axial direction of the pen refill. When the elastic probe valve assembly 2 is pressed and the head of the pen refill tube 1 is opened, the inner wall of one end of the pen holder 5 can compress the elastic air compression assembly 3, so that the ink can simultaneously open the port and apply pressure to dispense ink in one press action. The process is convenient and quick.

[0064] After the ink dispensing action is completed, the pen is removed, and the elastic air compression component 3 is reset under the action of the capillary guide hole 4, so as to perform the next ink dispensing action.

[0065] Furthermore, to facilitate airflow, a vent hole 51 can be provided through one side of the pen holder 5. The vent hole 51 allows air to flow inside and outside the pen holder 5, thereby facilitating the ink dispensing action of the pen refill.

[0066] The implementation principle of this application embodiment is as follows: by setting the pen holder 5, the function of quickly controlling the ink entry and exit can be realized.

[0067] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An open air pressurized refill, comprising a refill tube (1) filled with ink, characterized in that: further comprising a flexible probe valve assembly (2) movably arranged at a head of the refill tube (1) for opening and closing the head of the refill tube (1) to allow the ink to flow out or be blocked; and a flexible air compression assembly (3) arranged at a tail of the refill tube (1), when the head of the refill tube (1) is opened, the flexible air compression assembly (3) is compressed to press the ink in the refill tube (1) out; a plurality of capillary flow holes (4) are arranged through the side wall of the refill tube (1) and / or the flexible air compression assembly (3), the capillary flow holes (4) have a smaller diameter than the cross-sectional area of the inner cavity of the refill tube (1), when the refill tube (1) is closed, the flexible air compression assembly (3) returns to its natural shape through the capillary flow holes (4). The number of the capillary flow holes (4) arranged on the side wall of the refill tube (1) and / or the flexible air compression assembly (3) is multiple. The diameter of the capillary flow holes (4) is 0.18mm to 0.22mm.

2. An open air boost refill according to claim 1, characterized in that The flexible probe valve assembly (2) comprises 3. The open air boost refill of claim 1, wherein, a needle valve (21) with a size suitable for the opening of the end of the refill tube (1) and movably arranged in the refill tube (1); and a first elastic member (22) arranged in the refill tube (1) and connected to the refill tube (1) and the needle valve (21) at both ends, which drives the needle valve (21) to block the opening of the end of the refill tube (1) in a natural state.

4. The open air boost refill of claim 1, wherein, The flexible air compression assembly (3) is a gas bag member (31) fixedly sleeved on the tail of the refill tube (1). The tail of the refill tube (1) is provided with an overlapping recess (112), and the gas bag member (31) is sleeved on the overlapping recess (112). The flexible air compression assembly (3) comprises 5. The open air boost refill of claim 1, wherein, a piston member (32) movably arranged at the tail end of the refill tube (1); and a second elastic member (33) connected to the refill tube (1) and the piston member (32) at both ends, which drives the piston member (32) to block the opening of the tail end of the refill tube (1) in a natural state.

6. An open air boost refill according to claim 5, characterized in that The refill tube (1) comprises 7. The open air boost refill of claim 1, wherein, a tube body (11) for storing ink, the flexible air compression assembly (3) being arranged at one end of the tube body (11); and a pen head (12) having an ink outlet channel communicating with the inner cavity of the tube body (11), the flexible probe valve assembly (2) being movably arranged at the pen head (12), the other end of the tube body (11) having a first annular buckling part (111), and one end of the pen head (12) having a second annular buckling part (121) sealingly buckled with the first annular buckling part (111). ​ ​ 8. The open air boost refill of claim 1, wherein, ​ ​ ​ 9. A writing instrument comprising an open air pressurized refill according to any one of claims 1 to 8, characterized in that, Also include a pen holder (5), the booster refill activity set in the pen holder (5) inside, when the elastic probe valve assembly (2) is pressed and opens the head of the refill tube (1), the pen holder (5) will compress the elastic air compression assembly (3).

10. The pen of claim 9, wherein The pen holder (5) is provided with a gas hole (51) through the pen holder (5).

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