WO2019233132A1

WO2019233132A1 - Application tool

Info

Publication number: WO2019233132A1
Application number: PCT/CN2019/076390
Authority: WO
Inventors: 王立平; 周兴夫
Original assignee: 王水娟
Priority date: 2018-06-06
Filing date: 2019-02-28
Publication date: 2019-12-12
Also published as: CN110561945A

Abstract

An application tool, in particular an application tool provided with a porous body, comprising an application head (1), a liquid storage tube (4), a porous body (2) communicating with the application head (1), the porous body (2) being in communication with the ambient atmosphere; the application tool further comprises an air-liquid exchanger (3), the liquid storage tube (4) being in communication with the porous body (2) through the air-liquid exchanger (3), the air-liquid exchanger (3) comprising a liquid guiding passage (31) and an air guiding passage (30); and the porous body (2) comprises a buffer portion (20), an incremental capillary portion (21) and a liquid collection portion (22), and has different rising capillary pressures in each portion. The application tool can control the release of an application liquid and prevent the application liquid from leaking, and the structure is simple, the application is smooth, and the manufacturing is easy.

Description

A scribble tool

Technical field

The invention relates to a writing tool, in particular to a direct liquid writing tool in the technical field of writing, cosmetics, correction fluid, liquid glue and the like.

Background technique

In the field of graffiti, porous materials have been widely used. For example, in watercolor pens, markers, eyeliners, porous materials are used as materials that absorb and contain liquids. In the prior art, the most commonly used porous material is a roll-wrap core formed by coating a fiber bundle with a film. When used, the pen-wrap core is inserted and the graffiti head is inserted. The liquid is discharged to both ends, and it is also easy for the liquid to be released when writing. However, the amount of liquid discharged from the roll core will gradually decrease with the increase of the use time, which will cause blurred writing, and the roll core has the disadvantage of large residual liquid volume. For this reason, people have been researching new graffiti tools to overcome the shortcomings of roll cores as liquid storage media.

Patent Document 1 (Japanese Public Sho Sho 56-7504) discloses a direct liquid writing tool using two porous materials with different porosity as a liquid absorbing material, wherein the second liquid absorbing material is from a liquid supply port at the bottom of the liquid storage tube. Accept the scribble liquid and supply liquid to the scribble head. The air pipe communicating with the reservoir tube penetrates the second liquid absorbing material and abuts against the first liquid absorbing material. When the excess liquid is in the second liquid absorbing material, it is conducted to the first liquid absorbing material. The liquid material, the first liquid absorbing material, the content of the scribing liquid is increased, and the air duct is liquid-sealed, thereby achieving the purpose of automatic liquid supply. The disadvantage of this patent is that the air duct can be liquid-sealed only when the first liquid-absorbing material absorbs a sufficient amount of the scribing liquid from the second liquid-absorbing material, and the amount of the scribing liquid required in the liquid-absorbing material is large when the liquid is sealed. In addition, the graffiti head must pass through the first liquid absorbing material to reach the second liquid absorbing material in order to work, and the graffiti head is long and costly. Patent Document 2 (CN1749029A) discloses a direct-liquid writing tool. The patent also uses two porous materials with different porosities as the writing liquid adsorbent. The principle is to use multiple communication pipes with the same axial length to remove It is led out from the bottom of the liquid pipe, penetrates the low-density scribing liquid adsorbent, and connects to the high-density scribing liquid adsorbent. The rear end of the graffiti head is inserted into the high-density scribing liquid adsorbent, so as to shorten the length of the graffiti head. However, the patent has several disadvantages: 1. The patent sets a plurality of communicating tubes on the circumference with the pen tip as the axis, but the inner diameter of the pen shaft of many graffiti tools is small, usually less than 8mm. The space occupied by the outer wall is very limited for the low-density portion of the scribing liquid adsorbent. In this case, it is difficult to manufacture a plurality of communication pipes to pass through the low-density portion of the scribing liquid adsorbent. When multiple communication tubes are inserted in a small space, the low-density portion is broken and the liquid leaks; 2. When a plurality of communication tubes penetrate the low-density portion of the scribing liquid adsorbing body, they occupy a large amount of space of the low-density writing liquid adsorbing body, and the low-density writing The capacity of the liquid adsorbent to absorb the graffiti is significantly reduced. When the liquid storage tube leads the graffiti to the outside due to changes in the external environment, the graffiti tool is prone to leak due to the insufficient capacity of the low-density graffiti absorbent; 3. The patent will write the graffiti head. And a plurality of communication pipes are inserted into the high-density part and a plurality of communication pipes are arranged on the circumference centered on the graffiti head. The high-density part must have a large diameter and volume. The communication tube can be liquid-sealed only when the gap in the density part is blocked by the scribing liquid. This will cause a large amount of the scribing liquid in the storage tube to be exported to the high-density part. On the one hand, the user thinks that the amount of filling liquid is insufficient and reduces the user experience. After the scribing liquid in the storage tube is finished, the role of the high-density part is equivalent to the roll core, and the disadvantages of traditional roll core coating tools will be reflected; 4. The scribble liquid in this type of writing tool cannot be directly transmitted from the communication tube. The pen tip must pass through the high-density portion of the scribing liquid adsorbent. In the application of liquid chalk, metal ink pen and other graffiti applications that need to export the particle-containing writing fluid, the particles cannot be painted because the particles are filtered by the high-density portion of the scribing liquid adsorbent.

Both of the above-mentioned patented technologies need to export more scribble liquid from the liquid storage tube to achieve the purpose of the liquid-sealed communication tube. Even if not written, the amount of scribble liquid left in the liquid storage tube is already small. When there is less liquid, or when the scribble is not visible in the storage tube, although there is still a lot of scribble in the scribble absorbent, the user may mistakenly think that the scribble has been used up. Both of these situations lead to poor results. user experience.

Summary of the Invention

In order to solve the problems existing in the traditional roll-wrapped graffiti tools and some past direct-liquid graffiti tools, the present invention proposes a graffiti tool including a graffiti head; a porous body connected to the graffiti head, and the porous body communicates with the outside atmosphere; gas-liquid An exchanger; and a liquid storage tube communicating with the porous body through a gas-liquid exchanger. The porous body has a buffer portion close to the liquid storage tube, an increasing capillary portion provided below the buffer portion, and a liquid collecting portion provided below the increasing capillary portion; the rising capillary pressure of the increasing capillary portion increases from the buffer portion to the liquid collecting portion; The liquid exchanger has a liquid-conducting channel and an air-conducting channel. The front end of the gas-conducting channel is located at or below the front end of the buffer portion; the rising capillary pressure of the buffer portion is 50% to 85% of the rising capillary pressure of the liquid collecting portion. The liquid capacity is 2% to 25% of the storage tube capacity.

Further, the front end of the air-conducting channel is provided between the position of one-third from the front end of the incremental capillary portion and the front end of the liquid-conducting channel in the incremental capillary portion.

Further, the porous body is a porous material made of fibers.

Further, the cross-sectional area of the incremental capillary portion and the liquid collecting portion is 25% to 75% of the cross-sectional area of the incremental capillary portion and the buffer portion.

Further, the liquid-conducting channel is arranged in the air-conducting channel, and the liquid-conducting channel is a hollow tube or a water guiding core.

Further, the air-conducting channel is arranged in the liquid-conducting channel, and the liquid-conducting channel is a hollow ring-shaped tube or a hollow water guiding core.

Further, the liquid-conducting channel and the gas-conducting channel are arranged in parallel.

Further, the rear end of the air guide channel extends into the liquid storage tube.

Further, the gas-liquid exchanger is located in the radial center of the porous body.

Further, the liquid-conducting channel is located at a radial center of the porous body.

Further, the scribing tool further includes a porous body accommodating chamber, and the liquid collecting portion and the incremental capillary portion are formed by pressing the porous material from the porous body accommodating chamber radially from the outside to the inside.

Further, the liquid collecting portion and the incremental capillary portion are formed by radially pressing the porous material from the back to the back of the graffiti head.

Further, the front end of the liquid-conducting channel communicates with the graffiti head through the porous body.

Further, the air-conducting channel is arranged in the liquid-conducting channel, and the liquid-conducting channel is a hollow water-guiding core.

Further, the porous body further includes an absorbing portion provided below the liquid collecting portion.

According to the technical solution of the present invention, it is convenient for a user to observe the amount of scribing liquid, improve the user experience, and effectively prevent ink leakage under abnormal conditions.

BRIEF DESCRIPTION OF THE DRAWINGS

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a scribing tool according to a first embodiment of the present invention.

2 is a schematic structural diagram of a cross section of a gas-liquid exchanger in a graffiti tool according to an embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a scribing tool according to a second embodiment of the present invention.

4a is a schematic structural diagram of a scribing tool according to a third embodiment of the present invention.

FIG. 4b is a schematic structural cross-sectional view of a gas-liquid exchanger in a graffiti tool according to a third embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a scribing tool according to a fourth embodiment of the present invention.

6a is a schematic structural diagram of a scribing tool according to a fifth embodiment of the present invention.

FIG. 6b is a schematic structural cross-sectional view of a gas-liquid exchanger in a graffiti tool according to a fifth embodiment of the present invention.

FIG. 7a is a schematic structural diagram of a scribing tool according to a sixth embodiment of the present invention.

FIG. 7b is a schematic structural diagram of a cross section of a gas-liquid exchanger in a graffiti tool according to a sixth embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a scribing tool according to a seventh embodiment of the present invention.

FIG. 9 is a schematic structural diagram of a scribing tool according to an eighth embodiment of the present invention.

FIG. 10 is a schematic structural diagram of a scribing tool according to a ninth embodiment of the present invention.

11 is a schematic structural diagram of a scribing tool according to a tenth embodiment of the present invention.

Detailed ways

The embodiments of the present invention are described below with specific specific examples. Those skilled in the art can easily understand the advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be described in conjunction with the preferred embodiment, this does not mean that the features of the present invention are limited to this embodiment. On the contrary, the purpose of the invention introduction in combination with the embodiments is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, many specific details will be included in the following description. The invention may also be practiced without these details. In addition, in order to avoid confusion or obscure the point of the present invention, some specific details will be omitted in the description.

In addition, "up", "down", "front", and "back" used in the following description should not be construed as limiting the present invention. In the present invention, "down" and "front" refer to the end of the graffiti head, and "up" and "back" refer to the end of the liquid storage tube.

The normal condition or the condition not specifically mentioned in the present invention generally refers to a case where the room temperature is a standard atmospheric pressure, and the abnormal condition refers to a situation where the external temperature or pressure deviates from the normal condition. In the present invention, the ascending capillary pressure P is defined as a porous material (liquid collecting part or buffer part) of sufficient length (generally requiring 5-10 cm). Under normal conditions, one end is just in contact with the horizontal liquid surface of the scribing liquid and placed vertically. The pressure generated by the rise height h of the scribble fluid after 30 minutes,

P = ρgh,

Where ρ is the density of the graffiti, g is the acceleration of gravity, and h is the height of the graffiti

The test method for the height h of the scribble fluid is defined in the present invention as follows:

1) Put the porous material of length H into the scribble solution to absorb liquid to saturation, and test its saturated absorbent weight W ₀ ,

2) Using the same porous material and the same scribing liquid, place one end of the porous material just in contact with the scribing liquid level and leave it upright for 30 minutes, and test that the liquid absorption weight is W,

3) Calculate the value of h: h = (W / W ₀ ) x H

First embodiment

FIG. 1 is a schematic structural diagram of a scribing tool according to a first embodiment of the present invention. Referring to FIG. 1, this embodiment provides a graffiti tool including a graffiti head 1; a porous body 2 communicating with the graffiti head 1, the porous body 2 communicates with the outside atmosphere; a gas-liquid exchanger 3; and a porous body 2 passes gas-liquid The exchanger 3 communicates with a liquid storage tube 4. Among them, the porous body 2 has a buffer portion 20 near the liquid storage tube 4, an increasing capillary portion 21 provided below the buffer portion 20, and a liquid collecting portion 22 provided below the increasing capillary portion 21; the rising capillary pressure of the increasing capillary portion 21 is from Increasing from the buffer section 20 to the liquid collecting section 22; the gas-liquid exchanger 3 has an air guide channel 30 and a liquid guide channel 31, the front end of the air guide channel 30 is set at or below the front end of the buffer section 20, and the rising capillary of the buffer section 20 The pressure is 50-85% of the rising capillary pressure of the liquid collecting part 22, and the scribing liquid capacity of the liquid collecting part 22 is 2% -25% of the capacity of the liquid storage tube.

The front end of the air guide channel 30 is provided at a position at or below the front end of the buffer portion 20, and the front end of the air guide channel 30 is preferably provided in the incremental capillary portion 21 by a third from the front end of the incremental capillary portion 21. Between the position and the front end of the liquid guide channel 31. In this way, it is possible to ensure that there is sufficient storage capacity of the scribing liquid between the front end of the air guide channel 30 and the rear end of the buffer portion 20, and further ensure that ink leakage may occur due to insufficient buffer capacity under abnormal conditions.

The ascending capillary pressure of the buffer portion 20 is 50% to 85% of the ascending capillary pressure of the liquid collecting portion 22. For example, the ascending capillary pressure of the cushioning portion 20 is 50%, 55%, and 60% of the ascending capillary pressure of the liquid collecting portion 22. , 65%, 70%, 75%, 80%, 85%. When the ratio of the ascending capillary pressure of the buffer portion 20 to the ascending capillary pressure of the liquid collecting portion 22 is larger, the scribing liquid enriched in the liquid collecting portion 22 is more easily absorbed into the increasing capillary portion 21 and the buffering portion 20. The smaller the ratio of the rising capillary pressure of the buffer portion 20 to the rising capillary pressure of the liquid collecting portion 22 is, the harder it is for the scribing liquid enriched in the liquid collecting portion 22 to be absorbed into the incremental capillary portion 21 and the buffer portion 20.

When the ratio of the rising capillary pressure of the buffer portion 20 to the rising capillary pressure of the liquid collecting portion 22 exceeds 85%, a large amount of the scribing liquid will be absorbed into the increasing capillary portion 21 and the buffer portion 20, resulting in a large reduction of the scribing liquid in the reservoir tube. It is difficult for users to correctly judge the amount of scribble fluid used. In addition, since the incremental capillary portion 21 and the buffer portion 20 absorb a large amount of scribing fluid under normal conditions, the buffer capacity of the incremental capillary portion 21 and the buffer portion 20 is greatly reduced, and under abnormal conditions, ink leakage may occur due to insufficient buffer capacity. .

When the ratio of the rising capillary pressure of the buffer portion 20 to the rising capillary pressure of the liquid collecting portion 22 is less than 50%, the ink absorption capacity of the buffer portion 20 is too small, and under abnormal conditions, the excess writing liquid in the liquid collecting portion 22 cannot be used. The ink is leaked by the incremental capillary 21 and the buffer 20 in a timely and rapid manner.

The ratio of the ascending capillary pressure of the buffer portion 20 and the ascending capillary pressure of the liquid collecting portion 22 in the present embodiment preferably ranges from 60% to 70%.

The volume of the scribing liquid of the liquid collecting portion 22 is not greater than 25% of the capacity of the liquid storage tube. For example, the volume of the writing liquid of the liquid collecting portion 22 is 25%, 20%, 15%, 10%, 5% of the capacity of the liquid storage tube 4. ,2%. According to the scribing tool of this embodiment, the amount of liquid transferred from the liquid storage tube 4 to the liquid collecting part 22 after the scribing tool is assembled can be effectively restricted, and the amount of liquid in the liquid storage tube 4 before being painted is not less than the capacity of the liquid storage tube. 75%, which is convenient for users to observe the amount of scribble fluid and improve the user experience.

After the assembly of the scribble tool is completed, the scribble liquid in the liquid storage tube 4 is directly or indirectly introduced into the porous body 2 through the liquid guide channel 31 of the gas-liquid exchanger 3, and is concentrated in the liquid collection part 22 with the highest rising capillary pressure, and the liquid is stored at the same time. A negative pressure is gradually formed in the tube 4, and the air enters the liquid storage tube 4 through the air guiding channel 30 of the gas-liquid exchanger 3. As the scribing fluid in the porous body 2 increases, the scribbling fluid gradually occupies the capillary gap near the front end of the leading air passage 30, the air guiding passage 30 is gradually liquid-sealed, and the air no longer enters the liquid storage tube 4, and the scribing liquid is in the liquid storage tube 4. Balance with the porous body 2 is achieved. During the scribing, the scribing liquid on the scribing head 1 is consumed, and the liquid-conducting channel 31, the liquid collecting portion 22 or the incremental capillary 21 supplies ink to the scribing head 1, and the amount of the scribing liquid in the porous body 2 decreases until the front end of the air-conducting channel 30 The scribing liquid in the nearby capillary gap is replaced by air, and the outside air enters the air-conducting channel 30 of the gas-liquid exchanger 3 through the gas path in the pen shaft, and the capillary gap in the porous body 2 without the scribing liquid, and enters the liquid storage tube 4, The negative pressure in the liquid storage tube 4 decreases, and the scribble liquid is led out from the liquid guide channel 31 and is replenished to the porous body 2 until the scribble liquid in the porous body 2 increases and the gas guide channel 30 is liquid-sealed again. This process is repeated until the graffiti is used up.

According to the scribing tool in the invention, the front end of the air guide channel 30 is set at or below the front end of the buffer portion 20, the front end of the liquid guide channel 31 is inserted into the incremental capillary portion 21 or the liquid collecting portion 22, and the rising capillary pressure of the buffer portion 20 is set. From 50% to 85% of the ascending capillary pressure of the liquid portion 22, the scribing liquid capacity of the liquid collecting portion 22 is not greater than 25% of the liquid storage tube capacity. Therefore, under normal conditions, the scribing liquid in the porous body 2 is mainly concentrated in the liquid collection portion 22. As a result, most of the scribing liquid, usually 75% or more, remains in the liquid storage tube 4 before being scribbled.

Under abnormal conditions, if the liquid storage tube 4 is heated during transportation or use, the air in the liquid storage tube 4 expands and the negative pressure decreases. At this time, the scribing liquid in the liquid storage tube 4 is exported to the porous body 2 and rises. Under the action of capillary pressure, these scribble liquids are absorbed by the liquid collecting portion 22, the incremental capillary portion 21, and the buffer portion 20 until the scribble liquid is rebalanced between the porous body 2 and the liquid storage tube 4, which can effectively prevent the scribble liquid from the scribing tool. The graffiti head 1 leaked. When the above-mentioned abnormal condition disappears, the negative pressure in the liquid storage tube 4 increases, and the scribble liquid returns from the porous body 2 to the liquid storage tube 4 through the gas-liquid exchanger 3 until it is rebalanced between the porous body 2 and the liquid storage tube 4.

The porous body 2 of the present invention includes a buffer portion 20, a liquid collecting portion 22, and an increasing capillary portion 21 provided between the buffer portion 20 and the liquid collecting portion 22. The rising capillary pressure of the increasing capillary portion 21 is from the buffer portion 20 to the liquid collecting portion. The portion 22 increases, and the rising capillary pressure of the buffer portion 20 is 50% to 85% of the rising capillary pressure of the liquid collecting portion 22.

In the porous body 2 of the present invention, the cross-sectional area of the incremental capillary portion 21 and the liquid collecting portion 22 is 25% to 75%, preferably 35% to 50%, of the cross-sectional area of the incremental capillary portion 21 and the buffer portion 20. The cross-sectional area of the rear end of the liquid collecting portion 22 is 25% to 75%, preferably 35% to 50% of the cross-sectional area of the front end of the buffer portion 20. The smaller the numerical value, the larger the difference in ascending capillary pressure between the buffer portion 20 and the liquid collecting portion 22.

The density of the liquid collecting part 22 is between 0.08 and 0.5 g / cc, the density of the buffer part 20 is between 0.03 and 0.25 g / cc, and g / cc is grams per cubic centimeter. When the density of the buffer portion 20 is less than 0.03, it is difficult to mold the buffer portion, and manufacturing is difficult. When the density of the buffering portion 20 is greater than 0.25, the liquid absorbing capacity of the buffering portion 20 is too strong, resulting in an excessive amount of ink stored in the buffering portion 20 in a normal state, which reduces the leakage prevention ability of the porous body 2 in an abnormal state. It is preferably 0.06-0.16 g / cc.

The porous body 2 may further include a porous body accommodating chamber 5, and the liquid collecting portion 22 is formed by pressing the porous material from the porous body accommodating chamber 5 radially from the outside to the inside.

The porous body 2 is made of a filament or staple fiber with an adhesive or thermal bonding.

The fiber fineness of the porous body 2 is between 0.2 denier and 30 denier. Denier refers to the mass in grams of 9000m long fiber at a given moisture regain. The fiber fineness of the porous body 2 according to the present invention is preferably 1.5 denier to 10 denier, and most preferably 2 denier to 6 denier.

The fiber component of the porous body 2 is a single-component fiber, or a bi-component fiber, or a mixture of a single-component fiber and a bi-component fiber.

Similar to the structure of a writing tool using a common porous body, ie, a roll-wrap core, as the ink storage medium, both ends of the porous body in the present invention, that is, the rear end of the buffer portion 20 and the front end of the liquid collecting portion 22, communicate with the atmosphere for smoothness. Gas-liquid exchange, rapid absorption and release of graffiti. In the present invention, the porous body is a porous material made of fibers. The porous body is made of bonded fibers or unbonded fibers, but may also be made of sponge, porous plastic, or felt. Through certain process control, the axial strength of the bonded fiber porous body can be higher than the radial strength, which is convenient for radial compression and axial assembly. Holes can also be formed at the same time as the fibers are bonded, which facilitates the insertion of the gas-liquid exchanger 3 and the graffiti head 1.

In the scribing tool according to the present invention, the porous body 2 includes a buffer portion 20, an increasing capillary portion 21, and a liquid collecting portion 22, which are integrated or separated. The integrated structure is convenient to assemble and lower in cost. The split structure has more choices in the material selection of each part.

When the buffer portion 20 and the increasing capillary portion 21 are integrated, the rising capillary pressure of the buffer portion 20 is the same as the rising capillary pressure at the rear end of the increasing capillary portion 21. When the liquid collecting portion 22 and the increasing capillary portion 21 are integrated, the rising capillary pressure of the liquid collecting portion 22 is the same as the rising capillary pressure of the foremost end of the increasing capillary portion 21. When the buffer portion 20, the increasing capillary portion 21, and the liquid collecting portion 22 are separated, the rising capillary pressure of the buffer portion 20 and the rising capillary pressure at the rear end of the increasing capillary portion 21 may be the same or different according to the selection of the material. The rising capillary pressure of 22 may be the same as or different from the rising capillary pressure of the foremost end of the increasing capillary portion 21.

The graffiti tool according to the present invention can adopt a single-piece porous material to be radially compressed to form the liquid collecting portion 22 and the increasing capillary portion 21, which not only meets the requirements for rising capillary pressure, but also reduces parts, which is convenient for manufacturing. The rising capillary pressure of the incremental capillary 21 increases from top to bottom. In this case, the performance of the lower half of the incremental capillary 21 is close to that of the liquid collecting portion 22, and the performance of the upper half thereof is close to that of the buffer portion 20. In this structure, setting the front end position of the air guide channel 30 upward is helpful to increase the content of the scribing liquid in the porous body 2 and increasing the liquid output of the graffiti tool; setting the front end position of the air guide channel 30 downward is beneficial to reduce the porous body 2 The content of the scribing solution in the liquid improves the buffering capacity and the leakage preventing ability of the porous body 2 to the scribing solution.

In the graffiti tool of the present invention, a through hole can be formed in the radial center of the buffer portion 20, the increasing capillary portion 21, or the liquid collecting portion 22, so that the graffiti head 1 and the gas-liquid exchanger 3 can be inserted into the porous body 2 during assembly. When the liquid collecting part 22, the increasing capillary part 21, or the buffer part 20 has a through hole, the cross-sectional area does not include the cross-sectional area of the hole.

In the scribing tool according to the present invention, the void volume of the buffer portion 20 is 25-150% of the storage tube volume, and preferably 50-77% of the storage tube volume. This design can reasonably utilize the space inside the pen holder, and at the same time ensure that the graffiti does not leak from the graffiti head 1 when the graffiti tool changes temperature and pressure during transportation and use.

<Gas-liquid exchanger>

In the scribing tool according to the present invention, the front end of the air guide channel 30 of the gas-liquid exchanger 3 is disposed at the front end of the buffer portion 20 or below. When the front end position of the air guide channel 30 is located at the front end of the buffer portion 20, the liquid seal of the air guide channel 30 is the most difficult to occur, and the content of the scribing liquid in the porous body 2 is the largest, which is suitable for a scribing tool with a large liquid output. When the front end of the air guide channel 30 is located closer to the front end of the liquid collecting part 22, the liquid seal of the air guide channel 30 is most likely to occur, and the amount of the scribing liquid in the porous body 2 is the smallest. tool. When the front end of the air guide channel 30 is set from the rear end of the increasing capillary to the front end, the amount of liquid required at the front end of the liquid-sealed air guide channel 30 is gradually reduced in the porous body 2, and the amount of the scribing liquid in the porous body 2 is reduced. In order to adapt to different volumes of scribing tools. As the cross-sectional area of the increasing capillary 21 decreases toward the front end, this technique has the additional advantage that the further downward the front end of the air guide channel 30 is, the more significantly the scribing fluid in the porous body 2 is reduced during gas-liquid equilibrium, Under abnormal conditions, such as when the scribing liquid in the liquid storage tube 4 is led out of the liquid guide channel 31 due to temperature rise, the porous body 2 has a significantly increased capacity to absorb the scribing liquid, thereby significantly improving the ability to prevent the leakage of the scribing liquid. .

In the graffiti tool according to the present invention, the front end of the liquid guide channel 31 is inserted into the incremental capillary 21, the liquid collecting portion 22 or the graffiti head 1. The lower the front end of the liquid guide channel 31 of the gas-liquid exchanger 3 is, the more the penetrating liquid penetrates into the graffiti. The shorter the distance of the head 1 is, the faster the liquid supply speed is when writing.

In the scribing tool of the present invention, the liquid guide channel 31 is provided in the air guide channel 30, and the front end position of the liquid guide channel 31 can be flexibly set. For example, if the front end of the liquid guide channel 31 abuts the pen tip, the transfer of the graffiti from the front end of the liquid guide channel 31 is shortened Distance to the pen tip; in the scribing tool of the present invention, the air guide channel 30 is provided in the liquid guide channel 31, and the rear end position of the air guide channel 30 can be flexibly set, such as the rear end of the air guide channel 30 extends into the liquid storage tube 4 In the case of a high negative pressure outside, when the liquid level in the liquid storage tube 4 drops to expose the rear end of the air guide channel 30, the air in the liquid storage tube 4 can be led out through the air guide channel 30, thereby further reducing the storage. The discharge of the scribing liquid in the liquid pipe 4 reduces the risk of leakage.

The air guide channel 30 and the liquid guide channel 31 according to the present invention are arranged side by side, and the front end and rear end positions of the two can be flexibly set separately to meet the requirements of using different scribing tools.

In the graffiti tool of the present invention, the liquid-conducting channel 31 may be a hollow tube. This structure has a fast liquid discharge rate, which is beneficial to increase the liquid discharge amount. It is suitable for graffiti tools with a high liquid discharge amount, and also suitable for particles containing particles or debris Scribing fluid, such as particle-containing makeup fluid, liquid chalk scribble fluid, correction fluid, etc.

In the scribing tool of the present invention, the liquid guiding channel 31 may be a water guiding core, and the liquid guiding performance of the water guiding core is reliable and stable, and the manufacturing is convenient.

In the scribing tool of the present invention, the liquid-conducting channel may be a hollow drainage core, and the hole in the liquid-conducting channel is an air-conducting channel, and the structure is simple.

2 is a schematic structural diagram of a cross section of a gas-liquid exchanger in a graffiti tool according to an embodiment of the present invention. As shown in FIG. 2, the structure of the gas-liquid exchanger 3 may be a double-tube coaxial channel 2 a, and the liquid-conducting channel 31 is disposed in the gas-conducting channel 30, that is, the inner tube is formed as the liquid-conducting channel 31. The annular channel is formed as an air-conducting channel 30, and the liquid-conducting channel 31 is a hollow tube.

The structure of the gas-liquid exchanger 3 may be a single-tube dual-channel 2b, that is, a single tube is divided into a gas-conducting channel 30 and a liquid-conducting channel 31 by a partition.

The structure of the gas-liquid exchanger 3 may be a single-tube water-conducting core 2c, and a liquid-conducting channel 31 is provided in the air-conducting channel 30, that is, the liquid-conducting channel 31 is a water-conducting core, and an annular channel between the water-conducting core and the outer tube is formed as a gas-conducting gas. Channel 30.

The structure of the gas-liquid exchanger 3 may be a single-tube grooved water-guiding core 2d, that is, the water-guiding core in the single pipe is formed as a liquid-conducting channel 31, and the channel generated by slotting on the wall of the water-conducting core is formed as a gas-conducting channel 30.

The structure of the gas-liquid exchanger 3 may also be a double-tube coaxial channel 2e. This structure is different from the structure of 2a in that the air-conducting channel 30 is provided in the liquid-conducting channel 31, that is, the inner tube is formed as the air-conducting channel 30. The annular channel between the tube and the outer tube is formed as a liquid-conducting channel 31. In this case, the rear end of the gas-conducting channel 30 can extend into the liquid storage tube 4 and exceed the liquid level in the liquid storage tube. Hollow annular tube.

The structure of the gas-liquid exchanger 3 may be a hollow water-conducting core 2f, and the air-conducting channel 30 is provided in the liquid-conducting channel 31, that is, the hole in the water-conducting core is formed as the air-conducting channel 30.

The structure of the gas-liquid exchanger 3 may be any one of the above lists, and may also be other structures having similar functions.

The liquid-conducting channel 31 is provided in the air-conducting channel 30. This structure enhances the strength of the gas-liquid exchanger 3 while saving the volume of the gas-liquid exchanger 3. The gas-liquid exchanger 3 occupies a small proportion of the space in the porous body 2, and is also beneficial for inserting it into the porous body 2 and reducing the porosity. The destruction of the body 2 is very easy to assemble even in a pen with a small inner diameter.

In the graffiti tool according to the present invention, there are one or more air guide channels 30 of the gas-liquid exchanger 3. The number and size of the air-conducting channels 30 and the relative positions of the air-conducting channels and the liquid-conducting channels can be flexibly set according to the demand for the liquid output and the size of the internal space of the pen, which is another advantage of the present invention.

In the scribing tool according to the present invention, the front end of the liquid guide channel 31 or the air guide channel 30 may be sharp to facilitate insertion of the porous body 2.

In the scribing tool according to the present invention, the air-conducting channel 30 and the liquid-conducting channel 31 in the gas-liquid exchanger 3 are combined, and the gas-liquid exchanger 3 is located at the radial center of the porous body 2 or the liquid-conducting channel is located at the porous body 2 The radial center makes the distance between the transfer of the graffiti to the graffiti head 1 shorter, smoother graffiti, and easier manufacturing. Moreover, it is beneficial to improve the strength of the gas-liquid exchanger 3 and facilitate the assembly of graffiti tools, and it is very easy to manufacture graffiti tools with a small inner diameter of the pen shaft.

In the graffiti tool according to the present invention, the graffiti head 1 is a component for writing or smearing liquid. The rear end of the graffiti head 1 can be inserted into the incremental capillary 21 and abutted or inserted into the liquid collecting part 22. The length of the graffiti head 1 is the shortest when the rear end of the graffiti head 1 abuts against the liquid collecting part 22, which is beneficial to reducing the cost of the graffiti head. When the rear end of the graffiti head 1 is inserted into the liquid collecting part 22, it is beneficial for the graffiti head 1 to fully contact the liquid collecting part 22, and the liquid supply speed and reliability are improved. When the rear end of the graffiti head 1 is inserted into the incremental capillary 21, the liquid supply amount can be increased.

In the graffiti tool according to the present invention, the front end of the liquid guide channel 31 and the rear end of the graffiti head 1 abut. This solution allows the distance between the front end of the liquid guide channel 31 and the graffiti head 1 to be short and the liquid to be discharged quickly, which is beneficial to the export of graffiti containing large particles.

In the graffiti tool according to the present invention, a porous material of a porous body 2 is formed between a front end of the liquid guide channel 31 and a rear end of the graffiti head 1. When some of the graffiti is unstable and easy to precipitate and the graffiti is easily clogged by the precipitate, the porous material between the front end of the liquid guide channel 31 and the graffiti 1 will filter out these deposits to prevent the deposit from clogging the graffiti 1.

In the graffiti tool according to the present invention, the liquid storage tube 4 is a component for filling the graffiti liquid, and the replaceable liquid storage tube 4 can be used, which is beneficial to reuse the components such as the pen holder 6 and reduce waste of resources. The replacement liquid storage tube 4 may be connected to the upper part of the pen holder 6 of the graffiti tool by various methods, such as screw connection and snap connection.

The graffiti tool in this embodiment further includes a pen holder 6. The upper part of the pen holder 6 may be integrally formed with a liquid storage tube 4, or may be detachably connected to the liquid storage tube 4.

A graffiti head base 10 on which the graffiti head 1 is mounted can be integrally provided at the lower part of the pen shaft 6. The graffiti head base 10 can be separately formed and then detachably mounted on the lower part of the pen shaft 6.

A partition plate 61 may be integrally provided on the upper part of the pen holder 6, or a separately formed partition plate 61 may be detachably mounted. The gas-liquid exchanger may be integrally disposed on the partition plate 61, or may be separately formed, and then detachably installed on the partition plate 61, and preferably disposed on the lower portion of the partition plate 61.

The graffiti tool in this embodiment further includes a porous body accommodating chamber 5. The porous body accommodating chamber 5 may be integrally provided on the inner wall of the pen shaft 6, or may be detachably mounted on the inner wall of the pen shaft 6.

When the porous body accommodating chamber 5 is detachably mounted on the inner wall of the pen shaft 6, a accommodating chamber base may be provided on the inner wall of the pen shaft 6, and the porous body accommodating chamber 5 accommodating the porous body 2 may be installed on the accommodating chamber base. When the porous body accommodating chamber 5 is detachably mounted on the inner wall of the pen shaft 6, the porous body accommodating chamber 5 and the porous body 2 can be pre-assembled, and the base of the accommodating chamber and the pen shaft 6 can be integrally formed, which can facilitate modular production. And assembly.

In the scribing tool according to the present invention, all or at least the liquid collecting portion 22 of the porous body 2 is installed in the porous body accommodating chamber 5. The porous body accommodating chamber 5 made into a certain shape can conveniently shape the porous body 2 so as to form the gradually-increasing capillary portion 21 and the liquid collecting portion 22 of appropriate shapes. That is, the liquid collecting portion 22 and the progressive capillary portion 21 can be formed by pressing the porous body radially from the porous body accommodating chamber from the outside to the inside.

When the buffer portion 20 or the liquid collecting portion 22 and the incremental capillary portion 21 are in a split structure, the porous body accommodating chamber 5 facilitates close contact between the materials and allows the liquid to smoothly flow between the portions.

In the scribing tool according to the present invention, when the porous body 2 is mounted on the porous body accommodating chamber 5, the liquid collecting portion 22 and the incremental capillary portion 21 are molded into a desired shape. In this case, a porous material with the same upper and lower density is selected before installation. During the installation, the porous material is used to shape the porous material into the desired shape porous body 2 by using the shape of the porous body accommodating chamber 5, which is convenient to produce and low in cost.

Compared with the prior art, the straight-liquid type writing tool of the present invention has smooth writing and is not easy to leak, has a small amount of residual liquid, has a simple structure, is easy to manufacture, and is convenient for users to observe the amount of writing liquid in a liquid storage tube, which can be widely used in different types. The requirements of the graffiti tool for the amount of liquid and the type of the graffiti.

Second embodiment

As shown in FIG. 3, this embodiment is similar in structure to the first embodiment, and the same parts as the first embodiment are not described in the description of this embodiment. The difference is that the incremental capillary portion 21 and the liquid collecting portion 22 of the first embodiment can be formed by pressing the porous body accommodating chamber 5 radially from the outside to the inside. The porous body is squeezed radially to form the liquid collecting portion 22 and the increasing capillary portion 21, and the rising capillary pressure of the buffer portion 20 is 50-85% of the rising capillary pressure of the liquid collecting portion 22. The increasing capillary portion 21 borders the liquid collecting portion 22 The cross-sectional area is 25% to 75% of the cross-sectional area bordering the buffer portion 20, and the scribing liquid capacity of the liquid collecting portion 22 is not greater than 25% of the capacity of the liquid storage tube.

This embodiment is particularly suitable for graffiti tools, such as eyeliners, which have a small internal space in the pen barrel but a thick rear part of the graffiti head. In order to better derive the graffiti, the front end of the liquid guide channel 31 can be set against the rear end of the graffiti head 1 or inserted into the graffiti head 1.

Even under abnormal conditions, such as when the liquid storage tube 4 is heated during transportation, the air in the liquid storage tube 4 expands and the negative pressure decreases. At this time, the scribing liquid in the liquid storage tube 4 is led out to the porous body through the liquid guide channel 31. 2 or lead out to the porous body 2 through the peripheral surface of the graffiti head 1 until the graffiti is rebalanced between the porous body 2 and the liquid storage tube 4, which can effectively prevent the graffiti from leaking from the graffiti head 1. When the above-mentioned abnormal situation disappears, the negative pressure in the liquid storage tube 4 increases, and the scribble liquid in the porous body 2 returns to the liquid storage tube 4 through the gas-liquid exchanger 3 until it is rebalanced between the porous body 2 and the liquid storage tube 4 .

Obviously, according to Embodiment 1 and Embodiment 2, the porous body accommodating chamber and the graffiti head can also be used to press the porous material radially from the outside and the inside to form the incremental capillary portion 21 and the liquid collecting portion 22, respectively.

Third embodiment

This embodiment is a modification of the first embodiment. The same parts as those in the first embodiment will not be repeated in the description of this embodiment.

As shown in FIGS. 4a and 4b, the air-conducting channel 30 of the gas-liquid exchanger 3 of this embodiment is a plastic tube, and the liquid-conducting channel 31 is a water guiding core stuck in the air-conducting channel 30 through a reinforcing rib 32, and the liquid-conducting channel 31 And the air guide channel 30 abuts against the liquid collecting portion 22, and the front ends of the two are at the same height. The buffer portion 20 and the increasing capillary portion 21 are integrated with through holes, and are made of relatively thick fibers. The increasing capillary portion 21 is formed by compressing the porous body accommodation chamber 5 in a radial direction; the porosity of the buffer portion 20 and the liquid collecting portion 22 is the same. The liquid collecting portion 22 is made of thinner fibers separately. The cross-sectional area of the increasing capillary portion 21 and the liquid collecting portion 22 is 50% of the cross-sectional area of the buffer portion 20. The rising capillary pressure of the buffer portion 20 The capillary pressure of the liquid collecting portion 22 is 65% of the rising capillary pressure, the volume of the scribing liquid of the liquid collecting portion 22 is 10% of the capacity of the liquid storage tube, and the capillary void volume of the buffer portion 20 is 65% of the volume of the liquid storage tube.

This embodiment is suitable for a graffiti tool with a medium ink output, such as a watercolor pen. After the assembly of the scribble tool is completed, the scribble liquid in the liquid storage tube 4 is introduced into the liquid collecting part 22 through the liquid guide channel 31 and enriched there. At the same time, a negative pressure is gradually formed in the liquid storage tube 4, and the air enters the liquid storage through the air guide channel 30 Tube 4. As the scribing liquid in the liquid collecting portion 22 increases and occupies the capillary gap near the front end of the leading air channel 30, the air guiding channel 30 is liquid-sealed, and air no longer enters the liquid storage tube 4, and the scribing liquid is in the liquid storage tube 4 and porous. Equilibrium is reached between the two bodies. During the scribing, the scribing liquid on the scribing head 1 is consumed, and the liquid collecting portion 22 supplies ink to the scribing head 1. When the amount of liquid in the liquid collecting portion 22 decreases, the scribing liquid in the capillary gap near the front end of the air guide channel 30 is consumed. Instead of air, the outside air enters the air-conducting channel 30 through the air path in the pen 6 and the capillary voids of the porous body 2 without the scribing liquid, and finally enters the liquid storage tube 4. The negative pressure in the liquid storage tube 4 decreases, and the scribing liquid flows from the air The liquid passage 31 is led out and replenished to the porous body 2 until the scribing liquid in the porous body 2 is increased and the air-conducting passage 30 is liquid-sealed again. This process is repeated until the scribble is finished.

Under abnormal conditions, if the liquid storage tube 4 is heated during transportation, the air in the liquid storage tube 4 expands and the negative pressure decreases. At this time, the scribing liquid in the liquid storage tube 4 is exported to the liquid collecting part 22 and transferred to the increasing portion. Capillary portion 21 and buffer portion 20, under the action of rising capillary pressure, these scribble liquids are absorbed by incremental capillary portions 21 and buffer portion 20 until the scribble liquid is rebalanced between porous body 2 and reservoir tube 4, which can effectively prevent The graffiti liquid leaked from the graffiti head 1 of the graffiti tool. When the above abnormal condition disappears, the negative pressure in the liquid storage tube 4 increases, and the scribble liquid in the buffer portion 20 and the incremental capillary portion 21 is returned to the liquid collection portion 22 and returned to the liquid storage tube 4 through the gas-liquid exchanger 3 until the The porous body 2 and the liquid storage tube 4 are rebalanced.

In this embodiment, setting the front end position of the air-conducting channel upward will increase the content of the scribing liquid in the porous body 2, which can increase the liquid output of the scribing head.

Fourth embodiment

As shown in FIG. 5, the structure of this embodiment is similar to that of the third embodiment, but the front end of the air guide channel 30 abuts against the liquid collection portion 21, and the front end of the sharp-shaped liquid guide channel 31 is inserted into the liquid collection portion 22 to shorten the length of the graffiti head. Distance. The ascending capillary pressure of the buffer portion 20 is 70% of the ascending capillary pressure of the liquid collecting portion 22, the writing capacity of the liquid collecting portion 22 is 15% of the capacity of the liquid storage tube, and the capillary void volume of the buffering portion 20 is the volume of the liquid storage tube. 50%, the setting of this embodiment is beneficial to improve the smoothness of viscous liquid, such as liquid glue.

Fifth Embodiment

As shown in FIG. 6a and FIG. 6b, this embodiment is similar in structure to the fourth embodiment, but the liquid-conducting channel 31 is a hollow tube. The liquid-conducting channel 31 is inserted into the liquid-collecting portion 22 and abuts against the rear end of the graffiti head. The front end of 30 is located in the middle of the increasing capillary portion. The increasing capillary portion 21 and the liquid collecting portion 22 are formed by pressing a part of the integrated porous body 2 from the porous body accommodating chamber 5 in a radial direction. The rising capillary pressure of the buffer portion 20 rises as the liquid collecting portion 22 rises. 85% of the capillary pressure, the cross-sectional area of the incremental capillary portion 21 and the liquid collecting portion 22 is 75% of the cross-sectional area of the buffer portion 20, and the scribing liquid capacity of the liquid collecting portion 22 is the capacity of the storage tube. The capillary void volume of the buffer portion 20 is 150% of the volume of the liquid storage tube. This embodiment is suitable for a painting tool with a large amount of ink, such as a writing brush for calligraphy and painting. In this embodiment, a replaceable liquid storage tube is used, and components such as a pen holder can be reused, thereby saving the use cost.

Sixth embodiment

As shown in FIG. 7a and FIG. 7b, this embodiment is similar in structure to the first embodiment, but the air-conducting channel 30 and the liquid-conducting channel 31 adopt a side-by-side structure. The rising capillary pressure of the buffer portion 20 is the same as the rising capillary pressure of the liquid collecting portion 22. 60%, the volume of the scribing liquid of the liquid collecting portion 22 is 20% of the capacity of the liquid storage tube, and the capillary void volume of the buffer portion 20 is 77% of the volume of the liquid storage tube. The working principle of this embodiment is similar to that of the first embodiment. The juxtaposition of the liquid-conducting channel 31 and the gas-conducting channel 30 is suitable for an oval-shaped pen.

As shown in FIG. 7a, the rear end of the air guide channel 30 can also be extended into the liquid storage tube 4. In the case of a high negative external pressure, when the liquid level in the liquid storage tube 4 drops to expose the air guide channel 30, At the rear end, the air in the liquid storage tube 4 can be led out through the air guide channel 30, thereby reducing the export of the scribing liquid in the liquid storage tube 4, and further reducing the risk of leakage. The gas-conducting channel 30 and the liquid-conducting channel 31 in the gas-liquid exchanger 3 are juxtaposed. The gas-liquid exchanger 3 may be located at the radial center of the porous body 2, or the liquid-conducting channel 31 of the gas-liquid exchanger 3 is located at the porous body 2. The radial center makes the distance between the transfer of the graffiti to the graffiti head 1 shorter, smoother graffiti, and easier manufacturing. Moreover, it is beneficial to improve the strength of the gas-liquid exchanger 3 and facilitate the assembly of graffiti tools, and it is very easy to manufacture graffiti tools with a small inner diameter of the pen shaft.

Seventh embodiment

As shown in FIG. 8, this embodiment is similar in structure to the fifth embodiment, but the front end of the liquid guide channel 31 abuts the liquid collecting portion 22, and the front end of the air guide channel 30 is located in the incremental capillary portion 21 one-third from the front end. The cross-sectional area of the incremental capillary portion 21 and the liquid collecting portion 22 is 25% of the cross-sectional area of the buffer portion 20 and the rising capillary pressure of the buffer portion 20 is 50% of the rising capillary pressure of the liquid collecting portion 22. The volume of the scribing liquid of the liquid portion 22 is 5% of the capacity of the liquid storage tube, the capillary void volume of the buffer portion 20 is 50% of the volume of the liquid storage tube, and the graffiti head 1 abuts the front end of the liquid collecting portion 22. This embodiment is suitable for graffiti Fluid-permeable scribing tools, such as markers.

Eighth embodiment

As shown in FIG. 9, this embodiment is similar in structure to the fourth embodiment, except that the front end of the liquid guide channel communicates with the graffiti head through the porous body. In this embodiment, the front end of the liquid-conducting channel 31 formed by the water-conducting core may communicate with the graffiti core 11 or the graffiti ball of the graffiti head 1 through the liquid collecting part 22, and the graffiti head 1 and the porous body 2 communicate indirectly through the fluid-conducting channel 31; The scribing liquid volume of the liquid collecting portion 22 is 2% of the volume of the liquid storage tube. This embodiment is suitable for small graffiti tools, such as a signature pen. The liquid-conducting channel 31 can directly supply ink to the graffiti head, thereby improving the fluency of graffiti. And because the small amount of ink required by the small graffiti tool is very small, even under abnormal conditions, such as when the liquid storage tube 4 is heated during transportation, the air in the liquid storage tube 4 expands and the negative pressure decreases. The scribble fluid is led out to the liquid collection part 22 through the peripheral surface of the liquid guide channel 31 and transferred to the increasing capillary 21 and the buffer part 20 until the scribble fluid is rebalanced between the porous body 2 and the liquid storage tube 4, which can effectively prevent The graffiti liquid leaked from the graffiti head 1. When the above abnormal condition disappears, the negative pressure in the liquid storage tube 4 increases, and the scribble liquid in the buffer portion 20 and the incremental capillary portion 21 is returned to the liquid collection portion 22 and returned to the liquid storage tube 4 through the gas-liquid exchanger 3 until the The porous body 2 and the liquid storage tube 4 are rebalanced.

Ninth embodiment

As shown in FIG. 10, this embodiment is a modification of the first embodiment. The same parts as those in the first embodiment will not be repeated in the description of this embodiment. The gas-liquid exchanger 3 includes an outer tube 32 and an inner tube 33. The front ends of the outer tube 32 and the inner tube 33 abut against the liquid collecting portion 22, the rear end of the pen tip is close to the front end of the liquid guide channel, and the rear end of the outer tube 32 is integrally provided with the partition plate 61. Alternatively, it may be detachably mounted on the partition plate 61, which may be a part of the detachable liquid storage tube 4.

A hollow water guiding core is formed between the outer tube 32 and the inner tube 33 to form a liquid guiding channel 31. The channel in the inner tube 32 forms an air guiding channel 30. The hollow water guiding core and the rear end of the inner tube 33 extend into the ink tube 4. It preferably extends to the middle and upper part of the ink tube 4, that is, the rear ends of the liquid guide channel 31 and the air guide channel 30 are located in the middle and upper part of the ink tube 4.

The cross-sectional area of the incremental capillary portion 21 and the liquid collecting portion 22 is 42% of the cross-sectional area of the buffer portion 20 and the rising capillary pressure of the buffer portion 20 is 65% of the rising capillary pressure of the liquid collecting portion 22. The volume of the scribing liquid of the portion 22 is 10% of the capacity of the liquid storage tube, and the capillary void volume of the buffer portion 20 is 75% of the volume of the liquid storage tube. This setting can allow the air in the liquid storage tube to be discharged through the air guide channel when the external negative pressure is high, so the ability to prevent leakage can be further improved.

Tenth embodiment

As shown in FIG. 11, this embodiment is a modification of the first embodiment. The same parts as those in the first embodiment will not be repeated in the description of this embodiment.

The scribing tool of this embodiment may further include an absorption portion 7 disposed below the liquid collection portion 22. The rising capillary pressure of the absorption portion 7 is smaller than the liquid collection portion, and preferably smaller than the buffer portion. When the graffiti tool is dropped, it can effectively absorb the liquid leaking from the liquid collecting part when the external environment changes drastically, and further improve the ability to prevent leakage.

The graffiti tool of this embodiment may further include a leak-proof baffle 8 provided at the bottom of the porous body accommodating chamber 5. The leak-proof baffle 8 is provided with an insertion hole for inserting the graffiti head 1 in the center. ability.

The above-mentioned embodiments merely illustrate the principle of the present invention and its effects, but are not intended to limit the present invention. Anyone familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field to which they belong without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention. The scribing tools of the present invention generally refer to tools for writing and painting in office supplies, and various types of liquid smearing tools used in the fields of cosmetics, correction fluids, liquid glue and the like.

Claims

A graffiti tool comprising a graffiti head; a porous body in communication with the graffiti head, the porous body being in communication with the outside atmosphere; a gas-liquid exchanger; and a liquid storage tube communicating with the porous body through the gas-liquid exchanger, It is characterized by,

The porous body has a buffer portion close to the liquid storage tube, an increasing capillary portion provided below the buffer portion, and a liquid collecting portion provided below the increasing capillary portion; the rising capillary pressure of the increasing capillary portion is from The buffer portion increases from the liquid collecting portion; the gas-liquid exchanger has a liquid guiding channel and an air guiding channel, and the front end of the gas guiding channel is located at the front end of the buffer portion or below; the rising capillary of the buffer portion The pressure is 50% to 85% of the rising capillary pressure of the liquid collecting portion, and the scribing liquid capacity of the liquid collecting portion is 2% to 25% of the liquid storage tube capacity.
The scribing tool according to claim 1, wherein a front end of the air guide channel is provided in the incremental capillary portion at a position one-third from the front end of the incremental capillary portion and the liquid guide channel Position between the front ends.
The writing tool according to claim 1, wherein the porous body is a porous material made of fibers.
The scribing tool according to claim 1, wherein a cross-sectional area of the incremental capillary portion and the liquid collecting portion is 25% of a cross-sectional area of the incremental capillary portion and the buffer portion- 75%.
The scribing tool according to claim 1, wherein the liquid-conducting channel is disposed in the air-conducting channel, and the liquid-conducting channel is a hollow tube or a water guiding core.
The scribing tool according to claim 1, wherein the air guiding channel is disposed in the liquid guiding channel, and the liquid guiding channel is a hollow annular tube or a hollow water guiding core.
The scribing tool according to claim 1, wherein the liquid-conducting channel and the gas-conducting channel are arranged in parallel.
The graffiti tool according to claim 7, wherein a rear end of the air guide channel extends into the liquid storage tube.
The graffiti tool according to claim 1, wherein the gas-liquid exchanger is located at a radial center of the porous body.
The graffiti tool according to claim 1, wherein the liquid-conducting channel is located at a radial center of the porous body.
The graffiti tool according to claim 1, further comprising a porous body accommodating chamber, and the liquid collecting portion and the incremental capillary portion are pressed from the porous body accommodating chamber in a radial direction from the outside to the porous material. form.
The graffiti tool according to claim 1, wherein the liquid collecting portion and the incremental capillary portion are formed by pressing a porous material radially from the back of the graffiti head to the outside.
The graffiti tool according to claim 1, wherein a front end of the liquid guide channel communicates with the graffiti head through the porous body.
The scribing tool according to claim 1, wherein the air-conducting channel is provided in the liquid-conducting channel, and the liquid-conducting channel is a hollow water-guiding core, and The rear end is located in the upper middle portion of the ink tube.
The scribing tool according to claim 1, wherein the porous body further includes an absorption portion provided below the liquid collection portion.