CN110561946A

CN110561946A - Scribble instrument of writing

Info

Publication number: CN110561946A
Application number: CN201810576515.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Maybe Polymer Material (ningbo) Co Ltd
Current assignee: Maybe Polymer Material (ningbo) Co Ltd
Priority date: 2018-06-06
Filing date: 2018-06-06
Publication date: 2019-12-13
Also published as: WO2019233133A1

Abstract

The invention relates to a coating and writing tool, in particular to a coating and writing tool provided with a porous body, which comprises a coating and writing head; a liquid storage pipe; a porous body in communication with the write head, the porous body being in communication with ambient atmosphere; the porous body is communicated with the liquid storage pipe through the gas-liquid exchanger, and the gas-liquid exchanger comprises a liquid guide channel and a gas guide channel; the porous body comprises an upper buffer part, an increasing capillary part, a liquid collecting part, a decreasing capillary part and a lower buffer part, and the ascending capillary pressure of each part is utilized to effectively control the release of the coating liquid and prevent the coating liquid from leaking; simple structure, smooth scribbling and writing and convenient manufacture.

Description

Scribble instrument of writing

Technical Field

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

Background

In the art of writing and painting, porous materials are widely used, such as in watercolor pens, markers, eyeliners, as a material for absorbing and containing liquids. In the prior art, the most common porous material is a roll core formed by coating fiber bundles with a film, a penholder is inserted and a coating head is inserted when the roll core is used, and two ends of the roll core are communicated with the atmosphere, so that air is discharged to the two ends when liquid is injected, the liquid is diffused to the two ends, and the liquid is released when coating and writing are also facilitated. However, the liquid output of the coiled core gradually decreases with the increase of the service time, thereby causing the blur of the handwriting, and the coiled core has the defect of large residual liquid amount. For this reason, new writing tools have been studied to overcome the disadvantages of the core wrap as a liquid storage medium.

Patent document (CN1749029A) discloses a direct liquid type writing tool, which uses two porous materials with different porosities as a writing liquid adsorbent, and the principle of the direct liquid type writing tool is that a plurality of communicating pipes with the same axial length are led out from the bottom of a liquid storage pipe, penetrate through a low-density writing liquid adsorbent and then are connected to a high-density writing liquid adsorbent, and the rear end of a writing head is inserted into the high-density writing liquid adsorbent. This patent has several disadvantages: 1. the patent sets a plurality of communicating pipes on the circumference taking a pen point as an axis, but the inner diameter of the pen holder of a plurality of painting tools is small and is usually less than 8mm, the space occupied by the gas circuit and the outer wall of the painting liquid absorbent is deducted, and the space left for the painting liquid absorbent of the low density part is very limited, under the condition, the plurality of communicating pipes are inserted into and penetrate through the painting liquid absorbent of the low density part, so the manufacture is quite difficult, and the liquid leakage is easily caused by the damage of the low density part when the plurality of communicating pipes are inserted into the small space; 2. when the liquid storage pipe leads the coating liquid outwards due to the change of the external environment, the coating tool is easy to leak due to the insufficient capacity of the low-density coating liquid adsorbent; 3. according to the patent, the coating and writing head and the communicating pipes are inserted into the high-density part, the communicating pipes are arranged on the circumference with the coating and writing head as an axis, the high-density part has to have large diameter and volume, the communicating pipes can be sealed only when gaps in the high-density part are blocked by coating liquid, and therefore a large amount of coating liquid in the liquid storage pipe is led out to the high-density part, even if the coating liquid is not coated, the amount of the coating liquid left in the liquid storage pipe is small, a user can mistakenly think that the coating liquid is not filled, or when the coating liquid cannot be seen in the liquid storage pipe, the coating liquid is still stored in the coating liquid adsorption body, but the user mistakenly thinks that the coating liquid is used up, and the two conditions lead to poor user experience; 4. after the coating liquid in the liquid storage tube is coated, the high-density part acts as a coiled core, and the defects of the traditional coiled core coating tools can be reflected.

Disclosure of Invention

In order to solve the problems of the traditional coil core coating writing tool and some past direct liquid type coating writing tools, the invention provides a coating writing tool, which comprises a coating writing head; a porous body in communication with the write head, the porous body being in communication with the outside atmosphere; a gas-liquid exchanger; and a liquid storage pipe communicated with the porous body through the gas-liquid exchanger. The porous body arranged below the liquid storage pipe is sequentially provided with an upper buffer part, an increasing capillary part, a liquid collecting part, a decreasing capillary part and a lower buffer part from top to bottom; the rising capillary pressure of the gradually increasing capillary part increases gradually from the upper buffer part to the liquid collecting part, and the rising capillary pressure of the gradually decreasing capillary part decreases gradually from the liquid collecting part to the lower buffer part; the gas-liquid exchanger is provided with a gas guide channel and a liquid guide channel, and the front end of the gas guide channel is positioned between the upper buffer part and the lower buffer part.

Further, the rising capillary pressure of the upper buffer portion and the lower buffer portion is 20% to 80% of the rising capillary pressure of the liquid collecting portion.

Further, the capacity of the coating liquid in the liquid collecting part is 2 to 25 percent of the capacity of the liquid storage pipe.

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

Furthermore, the liquid guide channel is arranged in the gas guide channel and is a hollow tube or a water guide core.

Further, the air guide channel is arranged in the liquid guide channel, and the liquid guide channel is a hollow annular pipe or a hollow water guide core.

Furthermore, the liquid guide channel and the air guide channel are arranged in parallel.

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

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

Further, the liquid guiding passage is located at the radial center of the porous body.

Further, the writing instrument further includes a porous body accommodating chamber, and the liquid trap portion is formed by radially pressing the porous material from the outside to the inside by the porous body accommodating chamber.

further, the cross sectional area of the junction of the increasing capillary part and the liquid collecting part is 10% -65% of the cross sectional area of the junction of the increasing capillary part and the upper buffer part; the cross sectional area of the junction of the descending capillary part and the liquid collecting part is 10-65% of the cross sectional area of the junction of the descending capillary part and the lower buffer part.

Further, the front end of the liquid guide passage is communicated with the coating head through the porous body.

According to the technical scheme of the invention, a user can conveniently observe the liquid applying amount, the user experience is improved, and ink leakage under abnormal conditions can be effectively prevented.

Drawings

The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings.

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

Fig. 2 is a schematic structural view of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of the gas-liquid exchanger in the painting tool according to the embodiment of the invention.

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

Fig. 3b is a schematic structural diagram of a cross section (a cross section of a plane where an upper end surface of the upper buffer portion is located) of the gas-liquid exchanger in the painting tool according to the second embodiment of the present invention.

FIG. 4a is a schematic diagram of a writing tool according to a third embodiment of the present invention.

Fig. 4b is a schematic structural diagram of a cross section (a cross section of a plane where an upper end surface of the upper buffer portion is located) of the gas-liquid exchanger in the painting tool according to the third embodiment of the present invention.

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

Fig. 5b is a schematic structural diagram of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of the gas-liquid exchanger in the painting tool according to the fourth embodiment of the present invention.

FIG. 6a is a schematic diagram of a writing tool according to a fifth embodiment of the present invention.

Fig. 6b is a schematic structural view of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of the gas-liquid exchanger in the coating tool according to the fifth embodiment of the present invention.

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

Fig. 7b is a schematic structural diagram of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of a gas-liquid exchanger in a writing tool according to a sixth embodiment of the present invention.

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

Fig. 8b is a schematic structural view of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of the gas-liquid exchanger in the painting tool according to the seventh embodiment of the present invention.

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

Fig. 9b is a schematic structural view of a cross section (a cross section of a plane where an upper end surface of an upper buffer portion is located) of the gas-liquid exchanger in the writing instrument according to the eighth embodiment of the present invention.

Detailed Description

The following description is given by way of specific embodiments, and the advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to these embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.

The terms "upper", "lower", "front" and "rear" used in the following description should not be construed as limiting the present invention. In the invention, "lower" and "front" refer to one end of the painting and writing head, and "upper" and "rear" refer to one end of the liquid storage tube.

The normal condition or the condition not particularly noted in the present invention generally means a case where the room temperature is a normal atmospheric pressure, and the abnormal condition means a case where the outside temperature or pressure deviates from the normal condition. The rising capillary pressure P in the present invention is defined as the pressure generated by the rising height h of the writing liquid when the porous material (liquid collecting part, upper buffer part or lower buffer part) with sufficient length (generally 5-10cm) is in normal condition, one end of the porous material just contacts the level of the horizontal writing liquid and is vertically placed for 30 minutes,

P＝ρgh,

Wherein rho is the density of the coating liquid, g is the gravity acceleration, and h is the rising height of the coating liquid

The method for measuring the rise height h of the masking liquid is defined in the invention as follows:

1) Putting the porous material with the length of H into the coating liquid to absorb the liquid until the porous material is saturated, and testing the saturated absorption weight W of the porous material₀，

2) Using the same porous material and the same coating liquid, putting one end of the porous material just contacting the liquid surface of the coating liquid, standing for 30 minutes vertically, testing the liquid absorption weight W,

3) The h value is calculated as: h ═ W/W₀)x H

First embodiment

Fig. 1 is a schematic structural diagram of a writing tool according to a first embodiment of the present invention. Referring to FIG. 1, the present embodiment provides an application tool comprising an application write head 1; a porous body 2 communicating with the applying head 1, the porous body 2 communicating with the outside atmosphere; a gas-liquid exchanger 3; and a liquid storage pipe 4 communicating with the porous body 2 through the gas-liquid exchanger 3. Wherein, the porous body 2 arranged below the liquid storage tube 4 is provided with an upper buffer part 20a, an increasing capillary part 21a, a liquid collecting part 22, a decreasing capillary part 21b and a lower buffer part 20b from top to bottom in sequence; the ascending capillary pressure of the increasing capillary part 21a increases from the upper buffer part 20a toward the liquid collecting part 22, and the ascending capillary pressure of the decreasing capillary part 21b decreases from the liquid collecting part 22 toward the lower buffer part 20 b; the gas-liquid exchanger 3 has a gas guide passage 30 and a liquid guide passage 31, and the gas guide passage 30 has a leading end located between the upper buffer 20a and the lower buffer 20 b.

The capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 20 to 80% of the capillary pressure rise of the liquid collecting part 22.

The 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 passage 30 is disposed between the upper cushioning portion 20a and the lower cushioning portion 20b, excluding the front end of the upper cushioning portion 20a and the rear end of the lower cushioning portion 20 b; it is preferable that the front end of the air guide channel 30 is disposed at a position between the middle of the ascending capillary portion 21a and the middle of the descending capillary portion, so that it is possible to ensure that the porous body has a sufficient storage capacity for the writing liquid, and further to ensure that leakage of the liquid due to insufficient buffer capacity is not caused in abnormal conditions.

The capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 20% to 80% of the capillary pressure rise of the liquid collecting part 22, and for example, the capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 20%, 30%, 40%, 50%, 60%, 70%, 80% of the capillary pressure rise of the liquid collecting part 22. The rising capillary pressures of the upper buffer portion 20a and the lower buffer portion 20b may be the same or different. As the ratio of the rising capillary pressure of the upper buffer 20a to the rising capillary pressure of the liquid collecting part 22 is larger, the greater the tendency for the scribble liquid accumulated in the liquid collecting part 22 to be absorbed into the ascending capillary part 21a and the upper buffer 20 a; as the ratio of the rising capillary pressure of the lower buffer 20b to the rising capillary pressure of the liquid collecting part 22 is larger, the scribble liquid accumulated in the liquid collecting part 22 is more easily absorbed into the descending capillary part 21b and the lower buffer 20 b.

When the ratio of the increased capillary pressure of the upper buffer part 20a and the lower buffer part 20b to the increased capillary pressure of the liquid collecting part 22 exceeds 80%, a large amount of the coating liquid is absorbed into the porous body, and the coating liquid in the liquid storage tube is greatly reduced, so that it is difficult for the user to accurately determine the amount of the coating liquid used. Further, since the porous body absorbs a large amount of the coating liquid in a normal state, the buffer capacity of the porous body is greatly reduced, and liquid leakage may occur due to insufficient buffer capacity in an abnormal state. When the ratio of the increased capillary pressure of the upper buffer 20a to the increased capillary pressure of the liquid collecting part 22 is less than 20%, the liquid absorbing capacity of the upper buffer 20a is too small, and in an abnormal situation, the excessive scribble liquid in the liquid collecting part 22 cannot be absorbed by the increment capillary 21a and the upper buffer 20a promptly and quickly, resulting in liquid leakage. The same principle applies to the lower cushion portion 20 b.

The ratio of the capillary pressure increase of the upper buffer portion 20a and the lower buffer portion 20b to the capillary pressure increase of the liquid collecting portion 22 in the present embodiment is preferably in the range of 50% to 70%.

The volume of the coating liquid in the liquid collecting part 22 is 2% to 25% of the volume of the reservoir, and for example, the volume of the coating liquid in the liquid collecting part 22 is 2%, 5%, 10%, 15%, 20%, 25% of the volume of the reservoir 4. According to the scribbling tool of the embodiment, the liquid amount of the liquid storage pipe 4 transmitted to the liquid collecting part 22 after the scribbling tool is assembled can be effectively limited, the liquid amount in the liquid storage pipe 4 before scribbling can be enabled to be not less than 75% of the capacity of the liquid storage pipe, a user can conveniently observe the scribbling liquid amount, and user experience is improved.

After the coating and writing tool is assembled, the coating and writing liquid in the liquid storage tube 4 is directly or indirectly guided into the porous body 2 through the liquid guide channel 31 of the gas-liquid exchanger 3, is enriched in the liquid collection part 22 with the highest ascending capillary pressure, meanwhile, negative pressure is gradually formed in the liquid storage tube 4, and air enters the liquid storage tube 4 through the gas guide channel 30 of the gas-liquid exchanger 3. As the amount of the coating liquid in the porous body 2 increases, the coating liquid gradually occupies the capillary space near the front end of the air guide channel 30, the air guide channel 30 is gradually sealed, air no longer enters the liquid storage tube 4, and the coating liquid reaches equilibrium between the liquid storage tube 4 and the porous body 2. During painting, the painting liquid on the painting head 1 is consumed, the liquid guide channel 31, the liquid collecting part 22, the ascending capillary part 21a or the descending capillary part 21b supply liquid to the painting head 1, the painting liquid amount in the porous body 2 is reduced until the painting liquid in the capillary gap near the front end of the air guide channel 30 is replaced by air, the outside air enters the air guide channel 30 of the gas-liquid exchanger 3 through the air passage in the penholder and the capillary gap without the painting liquid in the porous body 2 and enters the liquid storage tube 4, the negative pressure in the liquid storage tube 4 is reduced, and the painting liquid is guided out from the liquid guide channel 31 and is supplemented to the porous body 2 until the painting liquid in the porous body 2 is increased and the air guide channel 30 is sealed by the renewed liquid. This process is repeated until the marking fluid is used up.

According to the writing instrument of the present invention, the front end of the air guide passage 30 is disposed between the upper buffer 20a and the lower buffer 20b, the rising capillary pressure of the upper buffer 20a and the lower buffer 20b is 20% to 80% of the rising capillary pressure of the liquid collecting part 22, and the writing liquid capacity of the liquid collecting part 22 is 2% to 25% of the liquid storage tube capacity. Therefore, the coating liquid in the porous body 2 is mainly concentrated in the liquid collecting portion 22 under normal conditions. So that most of the coating liquid, typically 75% or more, remains in the reservoir 4 before it is applied.

Under abnormal conditions, such as 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 coating liquid in the liquid storage tube 4 is led out to the porous body 2, and under the action of the rising capillary pressure, the coating liquid is absorbed by the liquid collecting part 22, the ascending capillary part 21a, the descending capillary part 21b, the upper buffer part 20a and the lower buffer part 20b until the coating liquid is rebalanced between the porous body 2 and the liquid storage tube 4, so that the leakage of the coating liquid from the coating head 1 of the coating tool can be effectively prevented. When the abnormal condition disappears, the negative pressure in the reservoir 4 increases, and the writing liquid returns from the porous body 2 to the reservoir 4 through the gas-liquid exchanger 3 until the balance between the porous body 2 and the reservoir 4 is restored.

< porous body, upper buffer, increasing capillary part, collecting part, decreasing capillary part, lower buffer >

The porous body 2 of the present invention is provided with an upper buffer portion, an increasing capillary portion, a liquid collecting portion, a decreasing capillary portion and a lower buffer portion in sequence from top to bottom; the ascending capillary pressure of the gradually-increasing capillary part increases gradually from the upper buffer part to the liquid collecting part, and the ascending capillary pressure of the gradually-decreasing capillary part decreases gradually from the liquid collecting part to the lower buffer part; the rising capillary pressure of the upper buffer portion and the lower buffer portion is 20% to 80% of the rising capillary pressure of the liquid collecting portion.

The cross sectional area of the junction of the ascending capillary part and the liquid collecting part is 10% -65%, preferably 25% -50% of the cross sectional area of the junction of the ascending capillary part and the upper buffer part; the cross sectional area of the junction of the descending capillary part and the liquid collecting part is 10% -65%, preferably 25% -50% of the cross sectional area of the junction of the descending capillary part and the lower buffer part. The smaller the numerical value, the larger the capillary pressure difference distance between the upper buffer 20a or the lower buffer 20b and the liquid trap 22.

The liquid-collecting portion 22 has a density of 0.08 to 0.5g/cc, the cushioning portion 20 has a density of 0.03 to 0.25g/cc, and g/cc is g/cc. When the density of the cushion portion 20 is less than 0.03, the cushion portion 20 is difficult to mold and difficult to manufacture. When the density of the cushioning portion 20 is greater than 0.25, the liquid absorbing ability of the cushioning portion 20 becomes too strong, so that the amount of ink stored in the cushioning portion 20 becomes too large in a normal state, and the leakage preventing ability of the porous body 2 in an abnormal state is lowered. Preferably 0.06-0.16 g/cc.

The porous body 2 may further include a porous-body housing chamber 5, and the liquid trap portion 22 may be formed by radially pressing the porous material from the outside to the inside from the porous-body housing chamber 5.

The porous body 2 is made by bonding filaments or staple fibers, and the bonding method may be bonding means such as an adhesive or thermal bonding.

The fiber fineness of the porous body 2 is 0.2-30 denier. Denier is the mass in grams of 9000m long fibers at a nominal moisture regain. The fiber fineness of the porous body 2 produced by the present invention is preferably 1.5 to 10 deniers, and most preferably 2 to 6 deniers.

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

The porous body 2 is provided with a through hole at the radial center.

Similar to the structure of the painting tool using a common porous body, i.e. a core wrap, as a liquid storage medium, both ends of the porous body in the present invention, i.e. the rear end of the upper buffer portion 20a and the front end of the lower buffer portion 20b, are communicated with the atmosphere, so as to smoothly perform gas-liquid exchange and rapidly absorb and release the painting liquid. The porous body in the present invention is a porous material made of fibers, and the porous body is made of bonded fibers or unbonded fibers, but may be made of sponge, porous plastic, felt, or the like. Through certain process control, the axial strength of the bonded fiber porous body can be higher than the radial strength, so that the radial compression and the axial assembly are facilitated. Holes may be formed simultaneously with the bonding of the fibers to facilitate the insertion of the gas-liquid exchanger 3 and the applicator head 1.

According to the scribbling tool, the porous body 2 comprises the upper buffer part 20a, the incremental capillary part 21a, the liquid collecting part 22, the incremental capillary part 21b and the lower buffer part 20b, and the porous body is integrated or split. The integrated structure is convenient to assemble and low in cost, and the split structure has more choices in material selection of each part.

When the upper buffer 20a and the increasing capillary 21a are integrated, the rising capillary pressure of the upper buffer 20a is the same as the rising capillary pressure of the rearmost end of the increasing capillary 21 a. When the liquid collecting part 22 and the increasing capillary part 21a are integrated, the rising capillary pressure of the liquid collecting part 22 is the same as the rising capillary pressure of the tip of the increasing capillary part 21 a. When the upper buffer part 20a, the incremental capillary part 21a and the upper liquid collecting part 22 are separated, the ascending capillary pressure of the upper buffer part 20a and the ascending capillary pressure at the rearmost end of the incremental capillary part 21a may be the same or different, and the ascending capillary pressure of the liquid collecting part 22 and the ascending capillary pressure at the foremost end of the incremental capillary part 21a may be the same or different, according to the selection of materials. The relationship of the rising capillary pressure among the lower buffer 20b, the descending capillary 21b, and the liquid collector 22 is similar to the above case.

The painting tool can adopt an integrated porous material to radially compress to form the liquid collecting part 22, the increasing capillary part 21a and the decreasing capillary part 21b, so that the requirement on increasing capillary pressure is met, parts are reduced, and the painting tool is convenient to manufacture. The ascending capillary pressure of the increasing capillary portion 21a increases from the upper buffer portion 20a toward the liquid collecting portion 22, and the ascending capillary pressure of the decreasing capillary portion 21b decreases from the liquid collecting portion 22 toward the lower buffer portion 20 b. In this case, the lower half of the incremental capillary 21a can approach the liquid-collecting part 22, while the upper half thereof can approach the upper buffer part 20 a; the upper half of the tapered capillary portion 21b is close to the liquid collecting portion 22, and the lower half thereof is close to the lower buffer portion 20 b. In this structure, the farther the position of the front end of the air guide passage 30 is from the middle of the liquid collecting portion 22, the more the content of the coating liquid in the porous body 2 is increased, and the liquid discharge amount of the coating tool is increased; the closer the front end of the air guide passage 30 is to the middle of the liquid collecting portion 22, the more advantageous the reduction of the content of the writing liquid in the porous body 2 is, and the improvement of the buffer capacity and the leakage prevention capability of the porous body 2 for the writing liquid.

According to the coating and writing tool, the radial centers of the upper buffer part 20a, the increasing capillary part 21a, the liquid collecting part 22, the decreasing capillary part 21b or the lower buffer part 20b can be provided with through holes, so that the coating and writing head 1 and the gas-liquid exchanger 3 can be conveniently inserted into the porous body 2 during assembly. When each portion has a through hole, the above cross-sectional area does not include the cross-sectional area of the hole.

In the writing instrument of the present invention, the void volume of the upper buffer 20a or the lower buffer 20b is 1% to 150% of the volume of the reservoir, preferably 20% to 60% of the volume of the reservoir, and the void volumes of the upper buffer 20a and the lower buffer 20b may be the same or different. The design can reasonably utilize the internal space of the painting tool, and simultaneously ensure that the painting liquid does not leak from the painting head 1 when the temperature and the air pressure of the painting tool change in the transportation and use processes.

< gas-liquid exchanger >

In the writing tool of the present invention, the front end of the air guide passage 30 of the gas-liquid exchanger 3 is disposed between the upper buffer 20a and the lower buffer 20 b. When the front end of the air guide channel 30 is positioned at the rear end of the incremental capillary part 21a or the front end of the incremental capillary part 21b, the liquid seal of the air guide channel 30 is most difficult to occur, and the coating liquid in the porous body 2 has the largest content, so that the air guide channel is suitable for a coating tool with large liquid output. When the front end of the air guide passage 30 is located in the middle of the liquid collecting portion 22, the liquid seal of the air guide passage 30 occurs most easily, and the amount of the liquid to be applied to the porous body 2 is minimized, which is suitable for a writing instrument having a small amount of liquid to be discharged. When the distance from the front end position of the air guide passage 30 to the middle position of the liquid collecting portion 22 increases, the amount of liquid required for the front end of the liquid seal air guide passage 30 gradually increases in the porous body 2, and the amount of the coating liquid in the porous body 2 increases, so as to be suitable for coating tools of different liquid discharge amounts. Since the increasing capillary 21a and the decreasing capillary 21b have smaller cross-sectional areas closer to the liquid collecting part 22, this technique brings additional advantages: the closer the front end of the air guide passage 30 is to the center of the liquid collecting portion 22, the more the amount of the coating liquid in the porous body 2 is significantly reduced at the time of the gas-liquid equilibrium, and in an abnormal condition, when the coating liquid in the liquid storage tube 4 is led out from the liquid guide passage 31 due to a temperature rise, the more the capacity of the porous body 2 for absorbing the coating liquid is significantly increased, thereby significantly improving the capability of preventing the leakage of the coating liquid.

According to the coating and writing tool, the front end of the liquid guide channel 31 is inserted into the ascending capillary part 21a, the liquid collecting part 22, the descending capillary part 21b and the lower buffer part 20b or is directly communicated with the coating and writing head 1, the closer the front end of the liquid guide channel 31 of the gas-liquid exchanger 3 is arranged to the coating and writing head, the shorter the distance of the coating and writing liquid penetrating into the coating and writing head 1 is, and the higher the liquid supply speed during coating and writing is.

According to the scribbling tool, the liquid guide channel 31 is arranged in the air guide channel 30, the front end position of the liquid guide channel 31 can be flexibly arranged, and if the front end of the liquid guide channel 31 abuts against a pen point, the distance of scribbling liquid transmitted from the front end of the liquid guide channel 31 to the pen point is shortened; according to the scribbling tool, the air guide channel 30 is arranged in the liquid guide channel 31, the rear end position of the air guide channel 30 can be flexibly arranged, for example, the rear end of the air guide channel 30 extends into the liquid storage tube 4, and when the liquid level in the liquid storage tube 4 is lowered to expose the rear end of the air guide channel 30 under the condition of high external negative pressure, air in the liquid storage tube 4 can be led out through the air guide channel 30, so that the leading-out of scribbling liquid in the liquid storage tube 4 is further reduced, and the leakage risk is reduced.

The air guide channel 30 and the liquid guide channel 31 are arranged in parallel, and the front ends and the rear ends of the air guide channel 30 and the liquid guide channel 31 can be flexibly arranged respectively so as to meet the use requirements of different painting and writing tools.

In the painting tool of the present invention, the liquid guide channel 31 can be a hollow tube, which has a structure that can quickly discharge liquid, is beneficial to increasing the liquid discharge amount, and is suitable for painting tools with high liquid discharge amount, and also suitable for painting liquids containing particles or fragments, such as cosmetic liquids containing particles, liquid chalk painting liquids, correction liquids, etc.

According to the scribbling tool, the liquid guide channel 31 can be a water guide core, and the water guide core is reliable and stable in liquid guide performance and convenient to manufacture.

The painting tool of the invention has the advantages that the liquid guide channel can be a hollow water guide core, the hole in the liquid guide channel is the air guide channel, and the structure is simple. A pipe can also be inserted into the hollow water diversion core, the pipe is an air guide channel, and the air guide channel can extend into the liquid storage pipe.

Fig. 2 is a schematic cross-sectional view of a gas-liquid exchanger in a writing instrument according to an embodiment of the present invention. As shown in fig. 2, the gas-liquid exchanger 3 may be structured as a double-tube coaxial passage 2a, and the liquid guide passage 31 is provided in the gas guide passage 30, i.e., the inner tube is formed as the liquid guide passage 31, the annular passage between the inner tube and the outer tube is formed as the gas guide passage 30, and the liquid guide passage 31 is a hollow tube.

The gas-liquid exchanger 3 may be configured as a single-tube double channel 2b, i.e., a single tube is divided into a gas guide channel 30 and a liquid guide channel 31 by a partition plate.

The gas-liquid exchanger 3 may be constructed as a single-tube water-introducing core 2c with the liquid-guiding passage 31 provided in the gas-guiding passage 30, i.e., the liquid-guiding passage 31 is a water-introducing core, and an annular passage between the water-introducing core and the outer tube is formed as the gas-guiding passage 30.

The gas-liquid exchanger 3 may be a single-tube grooved wick 2d, i.e., a wick in a single tube is formed as a liquid guide channel 31, and a channel formed by grooving the wall surface of the wick is formed as a gas guide channel 30.

The gas-liquid exchanger 3 may also be constructed as a double-tube coaxial channel 2e, which differs from the construction of 2a in that the gas-conducting channel 30 is arranged in a liquid-conducting channel 31, i.e. the inner tube is formed as a gas-conducting channel 30 and the annular channel between the inner and outer tubes is formed as a liquid-conducting channel 31, in which case the rear end of the gas-conducting channel 30 may extend into the reservoir 4 beyond the liquid level in the reservoir, the liquid-conducting channel 31 being a hollow annular tube.

the gas-liquid exchanger 3 may be structured as a hollow water guide core 2f, and the air guide passage 30 is provided in the liquid guide passage 31, i.e., the hole in the water guide core is formed as the air guide passage 30.

The gas-liquid exchanger 3 may have any of the above-described structures, or may have other structures having similar functions.

The liquid guide passage 31 is provided in the gas guide passage 30. This structure enhances the strength of the gas-liquid exchanger 3 while saving the volume of the gas-liquid exchanger 3, and the gas-liquid exchanger 3 occupies a small space proportion in the porous body 2, which is also advantageous for inserting the porous body 2 and reducing the damage to the porous body 2, and is very easy to assemble even in a pen barrel with a small inner diameter.

In the painting and writing tool of the present invention, one or more air guide channels 30 of the gas-liquid exchanger 3 are provided. The number and size of the air guide channels 30 and the relative positions of the air guide channels and the liquid guide channels can be flexibly set according to the requirement of the liquid outlet amount and the size of the internal space of the penholder, which is another advantage of the invention.

In the writing instrument of the present invention, the front end of the liquid guide passage 31 or the air guide passage 30 may be formed in a sharp shape to facilitate insertion of the porous body 2.

According to the coating and writing tool, the air guide channel 30 and the liquid guide channel 31 in the air-liquid exchanger 3 are combined together, the air-liquid exchanger 3 is positioned at the radial center of the porous body 2, or the liquid guide channel is positioned at the radial center of the porous body 2, so that the distance of the coating and writing liquid transmitted to the coating and writing head 1 is short, the coating and writing are smoother, and the manufacturing is easier. And is favorable to improving the intensity of the gas-liquid exchanger 3, is convenient for the assembly of the painting tool, and is very easy to manufacture the painting tool with small inner diameter of the pen holder.

< coating write head >

According to the coating and writing tool, the coating and writing head 1 is a part for writing or coating liquid, and the rear end of the coating and writing head 1 can be inserted into the increasing capillary part 21a, the decreasing capillary part 21b and the lower buffer part 20b or can be abutted against or inserted into the liquid collecting part 22. When the rear end of the painting and writing head 1 is inserted into the liquid collecting part 22, the painting and writing head 1 is in full contact with the liquid collecting part 22, and the liquid supply speed and reliability are improved.

According to the coating tool, the front end of the liquid guide channel 31 can abut against the rear end of the coating head 1. The proposal ensures that the distance from the front end of the liquid guide channel 31 to the coating head 1 is short and the liquid outlet is fast.

In the coating and writing tool, a porous material of a porous body 2 is arranged between the front end of a liquid guide channel 31 and the rear end of a coating and writing head 1. When some coating liquid is unstable and easy to precipitate, and the coating head is easy to be blocked by the precipitate, the porous material between the front end of the liquid guide channel 31 and the coating head 1 can filter the precipitate, and the precipitate is prevented from blocking the coating head 1.

< liquid storage pipe >

In the scribbling tool, the liquid storage pipe 4 is a component filled with scribbling liquid, and the replaceable liquid storage pipe 4 can be adopted, so that the repeated utilization of components such as a penholder 6 and the like is facilitated, and the resource waste is reduced. The replaced liquid storage tube 4 can be connected to the upper part of the penholder 6 of the painting and writing tool in various modes such as screwing, clamping and the like.

< Pen shaft >

The painting and writing tool in the embodiment further comprises a penholder 6, and the upper part of the penholder 6 can be integrally formed with the liquid storage pipe 4 and can also be detachably connected with the liquid storage pipe 4.

The lower portion of the barrel 6 may be integrally provided with a head holder 10 to which the head 1 is mounted, and the head holder 10 may be separately formed and then detachably mounted to the lower portion of the barrel 6.

The upper portion of the barrel 6 may be integrally provided with a partition 61, or a separately formed partition 61 may be detachably mounted. The gas-liquid exchanger may be integrally provided on the partition plate 61 or may be separately formed and then detachably mounted on the partition plate 61, preferably provided at the lower portion of the partition plate 61.

< porous body accommodating Chamber >

The painting tool in the present embodiment further includes a porous-body accommodating chamber 5, and the whole of the porous body 2 or at least the liquid collecting portion 22 is installed in the porous-body accommodating chamber 5. The shaped porous body accommodating chamber 5 allows the porous body 2 to be easily shaped to form the ascending capillary portion 21a, the liquid collecting portion 22, and the descending capillary portion 21b in appropriate shapes. That is, the liquid collecting part 22, the ascending capillary part 21a, and the descending capillary part 21b may be formed by radially pressing the porous body from the outside to the inside of the porous body accommodating chamber.

When the upper buffer 20a, the increasing capillary part 21a, the liquid collecting part 22, the decreasing capillary part 21b and the lower buffer 20b are of a split structure, the porous body accommodating chamber 5 facilitates close contact between the materials, so that liquid can smoothly flow between the parts.

In the writing instrument of the present invention, the liquid trap 22, the ascending capillary 21a, and the descending capillary 21b are shaped into a desired shape when the porous body 2 is mounted in the porous body accommodating chamber 5. In this case, a porous material having a uniform density in the top and bottom before installation is selected, and the porous material is molded into the porous body 2 having a desired shape by using the shape of the porous-body accommodating chamber 5 during installation, so that the production and the manufacture are convenient and the cost is low.

Compared with the prior art, the direct liquid type painting and writing tool has the advantages of smooth painting and writing, difficult night leakage, less residual liquid amount, simple structure, easy manufacture, and convenience for a user to observe the painting and writing liquid amount in the liquid storage pipe, and can be widely applied to the requirements of different types of painting and writing tools on the liquid outlet amount and the kind of the painting and writing liquid.

Second embodiment

As shown in fig. 3a and 3b, the structure of this embodiment is similar to that of the first embodiment, and the parts that are the same as those of the first embodiment are not described again in the description of this embodiment. The difference is that the liquid collecting part 22 of the present embodiment is formed by radially pressing the integral porous material from the outside to the inside of the porous-body accommodating chamber 5, and the ascending capillary part 21a and the descending capillary part 21b are formed along with this. The capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 60% of the capillary pressure rise of the liquid collecting part 22; the cross-sectional area of the liquid collecting portion 22 is 35% of the cross-sectional area of the upper buffer portion 20a and 35% of the cross-sectional area of the lower buffer portion 20 b; the capacity of the liquid collecting section 22 for the coating liquid is 10% of the capacity of the liquid storage tube. The front end of the air guide channel 30 is arranged in the middle of the liquid collecting part 22, the liquid guide channel 31 is a water guide core clamped in the air guide channel 30 through a reinforcing rib 32, and the front end of the liquid guide channel is arranged below the lower buffer part 20b and abuts against the rear end of the painting and writing head 1. The capillary void volumes of the upper buffer part 20a and the lower buffer part 20b are respectively 50% of the volume of the liquid storage tube

The embodiment is suitable for medium-liquid-output painting tools such as water color pens, marking pens, white board pens and the like. After the writing tool is assembled, the writing liquid in the liquid storage tube 4 is guided into the liquid collecting part 22 through the liquid guide channel 31 and is collected therein, meanwhile, negative pressure is gradually formed in the liquid storage tube 4, and air enters the liquid storage tube 4 through the air guide channel 30. When the coating liquid in the liquid collecting section 22 increases and occupies a capillary space near the front end of the air guide channel 30, the air guide channel 30 is sealed with liquid, air no longer enters the liquid storage tube 4, and the coating liquid reaches equilibrium between the liquid storage tube 4 and the porous body 2. When the amount of the liquid in the liquid collecting part 22 is reduced, the painting liquid in the capillary gap near the front end of the air guide channel 30 is replaced by air, the outside air enters the air guide channel 30 through the air passage in the penholder 6 and the capillary gap without the painting liquid in the porous body 2 and finally enters the liquid storage tube 4, the negative pressure in the liquid storage tube 4 is reduced, and the painting liquid is guided out from the liquid guide channel 31 and is supplemented to the porous body 2 until the painting liquid in the porous body 2 is increased and the air guide channel 30 is sealed by the liquid again. This process is repeated until the marking fluid is written.

Under abnormal conditions, such as the liquid storage tube 4 is heated in the transportation process, the air in the liquid storage tube 4 expands, the negative pressure is reduced, at the moment, the coating liquid in the liquid storage tube 4 is led out to the liquid collecting part 22 and is transferred to the ascending capillary part 21a, the descending capillary part 21b, the upper buffer part 20a and the lower buffer part 20b, and under the action of the ascending capillary pressure, the coating liquid is absorbed by the porous body 2 until the coating liquid is rebalanced between the porous body 2 and the liquid storage tube 4, so that the leakage of the coating liquid from the coating head 1 of the coating tool can be effectively prevented. When the abnormal condition disappears, the negative pressure in the reservoir 4 increases, and the coating liquid in the porous body 2 returns to the liquid collecting portion 22 and returns to the reservoir 4 through the gas-liquid exchanger 3 until the balance between the porous body 2 and the reservoir 4 is restored.

In this embodiment, setting the leading end position of the air guide passage upward increases the amount of the coating liquid in the porous body 2, that is, increases the amount of the liquid discharged from the coating head.

Third embodiment

As shown in fig. 4a and 4b, this embodiment has a structure similar to that of the second embodiment, but the liquid guiding channel 31 is a hollow tube, and the front end of the hollow tube is located in the middle of the tapered capillary part 21 b; the front end of the air guide channel 30 abuts against the upper end of the liquid collecting part 22. The capillary pressure of the upper buffer portion 20a is 80% of the capillary pressure of the liquid collecting portion 22, and the capillary pressure of the lower buffer portion 20b is 60% of the capillary pressure of the liquid collecting portion 22. The liquid collecting part 22, the tapered capillary part 21b, and the lower buffer part 20b are located in the porous-body accommodating chamber 5; the cross sectional area of the progressive increase capillary part 21a bordering on the liquid collecting part 22 is 65% of the cross sectional area bordering on the upper buffer part 20a, and the cross sectional area of the progressive decrease capillary part 21b bordering on the liquid collecting part 22 is 65% of the cross sectional area bordering on the lower buffer part 20 b; the liquid collecting part 22 has a capacity of 15% of the liquid storage tube, the upper buffer part 20a has a capillary void volume of 20% of the liquid storage tube, and the lower buffer part 20b has a capillary void volume of 60% of the liquid storage tube.

fourth embodiment

As shown in fig. 5a and 5b, this embodiment has a structure similar to that of the second embodiment, but the liquid guiding channel 31 is a water guiding core with two grooves mounted in the plastic tube 33, the plastic tube 33 and the grooves of the water guiding core form the air guiding channel 30, the front end of the air guiding channel 30 is located at 1/3 where the ascending capillary 21a is away from the upper end of the liquid collecting part 22, and the front end of the water guiding core is sharp and inserted into the middle of the liquid collecting part 22. The porous body 2 is a one-piece porous material, and the ascending capillary part 21a, the liquid collecting part 22 and the descending capillary part 21b are positioned in the porous body seat 5. The capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 50% of the capillary pressure rise of the liquid collecting part 22; the cross-sectional area of the liquid collecting portion 22 is 25% of the cross-sectional area of the upper buffer portion 20a and is also 25% of the cross-sectional area of the lower buffer portion 20 b; the capacity of the liquid collecting part 22 is 5% of the capacity of the reservoir, the capillary void volume of the upper buffer part 20a is 50% of the reservoir, and the capillary void volume of the lower buffer part 20b is 30% of the reservoir; the liquid storage pipe 4, the partition plate 61 and the plastic pipe wrapping the water diversion core are independently and integrally formed, and modular assembly is facilitated. The trailing end of the applicator head 1 abuts the lower end of the sump portion 22. The structure is beneficial to the coating of viscous coating liquid, such as eyeliner, liquid glue and the like.

Fifth embodiment

As shown in fig. 6a and 6b, the present embodiment is similar to the second embodiment, except that the upper buffering portion 20a of the present embodiment is a separate body, and the rest of the portions are integrated; the upper buffer 20a, the ascending capillary 21a, and the liquid collecting part 22 are located in the porous-body accommodating chamber 5. The capillary pressure of the upper buffer part 20a is 60% of the capillary pressure of the liquid collecting part 22, and the capillary pressure of the lower buffer part 20b is 80% of the capillary pressure of the liquid collecting part 22; the cross-sectional area of the liquid collecting portion 22 is 65% of the cross-sectional area of the upper buffer portion 20a and is also 65% of the cross-sectional area of the lower buffer portion 20 b; the capacity of the liquid collecting section 22 for the coating liquid is 5% of the capacity of the liquid storage tube. The front end of the air guide channel 30 is arranged at the upper end of the ascending capillary part 21a, and the liquid guide channel 31 is a water guide core, and the front end of the air guide channel is arranged at the lower end of the descending capillary part 21b and abuts against the rear end of the smearing head 1.

The capillary void volumes of the upper buffer part 20a and the lower buffer part 20b are respectively 150% of the liquid storage tube volume, and the embodiment is suitable for painting tools with large ink output quantity, such as writing brushes for calligraphy and painting. This embodiment adopts alternate form liquid storage tube, can reuse parts such as penholder, saves use cost.

Sixth embodiment

As shown in fig. 7a and 7b, this embodiment is similar to the first embodiment, but the air guide channel 30 and the liquid guide channel 31 are hollow tubes, and adopt a side-by-side structure, the lower end of the air guide channel 30 abuts against the upper end of the liquid collecting part 22, and the lower end of the liquid guide channel 31 is located in the middle of the liquid collecting part 22. The upper buffer 20a, the ascending capillary 21a, the liquid trap 22, the descending capillary 21b, and the lower buffer 20b are located in the porous-body accommodating chamber 5. The capillary pressure rise of the upper buffer 20a is 60% of the capillary pressure rise of the liquid collecting part 22, the capillary pressure rise of the lower buffer 20b is 20% of the capillary pressure rise of the liquid collecting part 22, the capacity of the liquid coating of the liquid collecting part 22 is 25% of the capacity of the liquid storage tube, the capillary void volume of the upper buffer 20a is 1% of the capacity of the liquid storage tube, and the capillary void volume of the lower buffer 20 is 60% of the capacity of the liquid storage tube.

As shown in fig. 7a, the rear end of the air guide channel 30 can be extended into the liquid storage tube 4, and when the liquid level in the liquid storage tube 4 drops to expose the rear end of the air guide channel 30 under the condition of high external negative pressure, air in the liquid storage tube 4 can be led out through the air guide channel 30, so that the leading-out of the painting liquid in the liquid storage tube 4 is reduced, and the leakage risk is further reduced. The gas-guiding passage 30 and the liquid-guiding passage 31 in the gas-liquid exchanger 3 are juxtaposed, and the gas-liquid exchanger 3 may be located at the radial center of the porous body 2, or the liquid-guiding passage 31 of the gas-liquid exchanger 3 may be located at the radial center of the porous body 2. The working principle of the present embodiment is similar to that of embodiment 1, and the juxtaposition of the liquid guide channel 31 and the air guide channel 30 is particularly suitable for an oval pen barrel.

Seventh embodiment

As shown in fig. 8a and 8b, the present embodiment is a modification of the first embodiment. The same parts as those of the first embodiment will not be described again in the description of this embodiment. The gas-liquid exchanger 3 includes an outer tube 32 and an inner tube 33, the front end of the outer tube 32 abuts against the upper end of the liquid collecting portion 22, and the front end of the inner tube 33 is located at the lower end of the liquid collecting portion 22; a liquid guide channel 31 is formed between the outer tube 32 and the inner tube 33 through arranging a hollow water guide core, the channel in the inner tube 32 forms an air guide channel 30, the rear end of the inner tube 33 extends into the liquid storage tube 4 and preferentially extends to the middle upper part of the liquid storage tube 4, namely the rear end of the air guide channel 30 is positioned at the middle upper part of the liquid storage tube 4. The rear end of the pen point is close to the front end of the liquid guide channel 31, and the rear end of the outer tube 32 is integrated with a partition plate 61 or detachably arranged on the partition plate 61, wherein the partition plate can be a part of the detachable liquid storage tube 4. The ascending capillary portion 21a, the liquid collecting portion 22, and the descending capillary portion 21b are located in the porous-body accommodating chamber 5.

The capillary pressure rise of the upper buffer part 20a and the lower buffer part 20b is 50% of the capillary pressure rise of the liquid collecting part 22; the cross-sectional area of the liquid collecting portion 22 is 25% of the cross-sectional area of the upper buffer portion 20a and is also 25% of the cross-sectional area of the lower buffer portion 20 b; the capacity of the coating liquid in the liquid collecting part 22 is 5% of the capacity of the liquid storage pipe; the capillary void volume of the upper buffer portion 20a is 30% of the volume of the reservoir, and the capillary void volume of the lower buffer portion 20b is 80% of the volume of the reservoir. The air in the liquid storage pipe can be discharged through the air guide channel when the air is arranged at high negative pressure outside, so that the leakage prevention capability can be further improved.

Eighth embodiment

As shown in fig. 9, this embodiment is similar in structure to the second embodiment, except that the leading end of the liquid guiding channel 31 passes through the porous body 3 and is inserted into the head 1, and communicates with the head 1, and the liquid collecting part 2 is located in the porous body accommodating chamber 5. The liquid guide channel 31 is a water guide core which is clamped in the air guide channel 30 by a reinforcing rib 32. The coating and writing head 1 is indirectly communicated with the porous body 2 through the liquid guide channel 31; the capacity of the liquid collecting section 22 for the coating liquid is 2% of the capacity of the liquid storage tube. The capillary pressure rise of the upper buffer 20a and the lower buffer 20b is 60% of the capillary pressure rise of the liquid collecting part 22, and the cross-sectional area of the liquid collecting part 22 is 35% of the cross-sectional area of the upper buffer 20a and 35% of the cross-sectional area of the lower buffer 20 b; the capillary void volume of the upper buffer portion 20a is 100% of the volume of the reservoir, and the capillary void volume of the lower buffer portion 20b is 1% of the volume of the reservoir.

The embodiment is suitable for small painting tools such as sign pens and the like. The liquid guide channel 31 can directly supply ink to the coating head, and coating fluency is improved. Since the ink requirement of the fine writing instrument is small, even in an abnormal situation, 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, and at this time, the writing liquid in the liquid storage tube 4 is guided out to the liquid collecting part 22 through the peripheral surface of the liquid guide channel 31 and is transferred to other parts of the porous body until the writing liquid is rebalanced between the porous body 2 and the liquid storage tube 4, so that the writing liquid can be effectively prevented from leaking from the writing head 1. When the abnormal condition disappears, the negative pressure in the reservoir 4 increases, and the coating liquid in the porous body 2 returns to the liquid collecting portion 22 and returns to the reservoir 4 through the gas-liquid exchanger 3 until the balance between the porous body 2 and the reservoir 4 is restored.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention. The painting tool of the present invention broadly refers to tools for writing and painting in office supplies, and various liquid painting tools used in the fields of cosmetics, correction fluids, liquid glues, and the like.

Claims

1. A kind of scribble write tool, including scribbling the write head; a porous body in communication with the write head, the porous body being in communication with the outside atmosphere; a gas-liquid exchanger; and a liquid storage pipe communicating with the porous body through the gas-liquid exchanger,

The porous body arranged below the liquid storage pipe is sequentially provided with an upper buffer part, an increasing capillary part, a liquid collecting part, a decreasing capillary part and a lower buffer part from top to bottom; the ascending capillary pressure of the gradually-increasing capillary part increases gradually from the upper buffer part to the liquid collecting part, and the ascending capillary pressure of the gradually-decreasing capillary part decreases gradually from the liquid collecting part to the lower buffer part; the gas-liquid exchanger is provided with a gas guide channel and a liquid guide channel, and the front end of the gas guide channel is positioned between the upper buffer part and the lower buffer part.

2. The writing instrument of claim 1, wherein the rising capillary pressure of the upper buffer portion and the lower buffer portion is 20% to 80% of the rising capillary pressure of the liquid collecting portion.

3. The writing instrument of claim 1, wherein the liquid collecting portion has a liquid capacity of 2% to 25% of the capacity of the reservoir.

4. The applicator of claim 1, wherein the porous body is a porous material made of fibers.

5. The writing instrument of claim 1, wherein the fluid conducting channel is disposed within the gas conducting channel, the fluid conducting channel being a hollow tube or a water conducting core.

6. The writing instrument of claim 1, wherein the air guide channel is disposed within the liquid guide channel, the liquid guide channel being a hollow annular tube or a hollow water guide core.

7. The applicator of claim 1, wherein the fluid-conducting channel is juxtaposed to the air-conducting channel.

8. The writing instrument of claim 6 or 7, wherein a rear end of the air guide channel extends into the reservoir.

9. The writing instrument of claim 1, wherein the gas-liquid exchanger is located at a radial center of the porous body.

10. The applicator of claim 1, wherein the fluid conducting channel is located at a radial center of the porous body.

11. The applicator of claim 1, further comprising a porous body accommodating chamber, wherein the liquid collecting portion is formed by radially pressing a porous material from the outside to the inside from the porous body accommodating chamber.

12. The applicator of claim 1, wherein the cross-sectional area of the incremental wick bordering the liquid trap is between 10% and 65% of the cross-sectional area of the incremental wick bordering the upper buffer; the cross sectional area of the junction of the descending capillary part and the liquid collecting part is 10% -65% of the cross sectional area of the junction of the descending capillary part and the lower buffer part.

13. The applicator of claim 1, wherein the leading end of the fluid conducting channel communicates with the head through the porous body.