JP2003226091A - Applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an applicator not generating ink leakage such as dripping or the like even during preservation or under various use environment conditions, especially suitable for oily ink, having quality keeping the proper discharge of ink, easy to confirm the residual amount of the ink in a holder from appearance and capable of being manufactured inexpensively from a practical aspect. <P>SOLUTION: The applicator is constituted by connecting the front side of an ink occlusion body to one end of an ink communication part while connecting a coating body to the other end of the ink occlusion body and connecting the ink communication part to an ink housing part. The rear side of the ink occlusion body is allowed to communicate with the open air and the density (or capillary force) of the ink communication part is made higher than the density (or capillary force) of the ink occlusion body but lower than the density (or capillary force) of the coating body. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention contains a liquid material (hereinafter referred to as ink) such as water-based and oil-based inks for writing instruments, inks for jet printers, cosmetic liquids such as eyeliners, and coating liquids such as paints and drugs. Equipped with a raw ink tank,
The present invention relates to an applicator equipped with a mechanism for automatically controlling the ejection of ink in response to application, writing and recording.

[0002]

2. Description of the Related Art Conventionally, an ink accommodating portion is provided in a shaft cylinder, and the accommodated ink is sequentially replenished to an applicator body (pen body) as it is used up for writing or coating, so that writing or coating can be continuously performed. A writing instrument for automatic discharge control of raw ink has been known. For example, in Japanese Utility Model Publication No. 60-69690, an ink absorber is arranged in an ink circulation path between an ink containing portion in a shaft and a tip of a coating body, and ink transfer pressure (capillary tube) in the capillary of the coating body corresponding to writing is written. There is described a raw ink discharge control mechanism that allows ink to be circulated by osmotic pressure) for continuous writing.

[0003]

By the way, in the above-mentioned writing instrument, an ink occlusion body such as a sponge is arranged between the ink containing section and the coating body in order to prevent the ink from dripping, and the overflowing ink is prevented. It was supposed to be absorbed. However, the ink storage body often naturally absorbs the ink in the ink storage section when it is left in a natural state, and the ink often fills up. When the ink swells unsteadily and the ink overflows, the ink occlusion body does not play a role of absorbing the ink, and there is a problem that the ink falls off from the application body. Further, in the above writing instrument, when manufacturing a product with a large capacity ink tank, if the internal volume of the ink tank is increased, the amount of ink overflow due to air expansion also increases proportionally, so it is necessary to increase the size of the ink occlusion body. is there. In this case, since it is necessary to install a large ink absorber installation part between the ink tank and the rear part of the pen, the ink existing state (residual amount) in the shaft from the outside.
Since there are many parts where it is difficult to confirm, there were many restrictions on the design of the preferable shaft appearance. By the way, when trying to obtain a product filled with an oil-based ink having an appropriate function, since the oil-based ink generally penetrates quickly into paper, etc., there is a problem of increasing the ink discharge because the coating material is liable to be scratched. It was However, since the oil-based ink uses a solvent whose surface tension is lower than that of the water-based ink, it has strong wettability / permeability to the occlusion body and is likely to undergo the natural absorption described above, and the holding power of the ink occlusion body is also reduced. There was a problem that fluffing was more likely to occur than with water-based ink. In addition, since oil-based inks often use a solvent with a high vapor pressure, the amount of gas expansion in the ink storage portion when the temperature rises is large, and the problem of dripping is more difficult to solve. It has been difficult to provide a preferable product for ink. The present invention does not cause ink leakage such as dripping under a variety of use environment conditions during storage or use, not only when using water-based inks but also oil-based inks, and particularly at a high writing speed. An object of the present invention is to provide an applicator that has a quality for maintaining appropriate ink ejection, is easy to check the amount of ink remaining in the shaft from the outside, and can be manufactured practically at low cost.

[0004]

According to the present invention, the front side of an ink occlusion body is connected to one end of an ink communication part, and the applicator is connected to the other end of the ink communication part to connect the ink communication part and the ink containing part. Connected, the rear side of the ink occlusion body communicates with the outside air, the density (or capillary force) of the ink communicating portion is higher than the ink occlusion body density (or capillary force), and the applied body density (or capillary force). The gist is an applicator characterized by being made smaller.

[0005]

In the applicator of the present invention, the location of the ink occlusion body is devised so that the density (or capillary force) of the ink communicating portion connected to the ink containing portion can be changed to the density of the ink occlusion body (or capillary force).
By setting the density higher than the above and lower than the density (or capillary force) of the coating body, it is possible to prevent the ink in the ink containing portion from being naturally absorbed and filling the entire ink storage body in a state of being left naturally.

The ink occlusion body is in a state of naturally absorbing the ink in the ink containing portion when the external air corresponding to the ink absorption amount is sucked into the ink containing portion (air is exchanged). Therefore, conversely, by suppressing such air movement, the ink is naturally absorbed in the entire ink occlusion body, and the density (or capillary force) arrangement as described above is arranged so as not to fill the ink. That is, by making the density (or capillary force) of the ink communicating portion higher than the density (or capillary force) of the ink occlusion body, locally strong capillary force works near the ink communicating portion, and the ink is always in a liquid-tight state. Keep Therefore, even if the ink occlusion body having a weak capillary action tries to absorb the ink in the ink containing portion, the liquid-tight state suppresses the intake of the external air that is about to enter the tank.
Ink is not filled in the ink occlusion body and keeps non-absorbed state. The control of the air suction by the liquid-tight state as described above allows the air suction to be performed in conjunction with the absorption and movement of the ink in the ink containing portion to the coating body when the coating body having a stronger capillary action consumes the ink. , Air passes through the liquid-tight portion and continuous writing is possible. With the above operation, the applicator according to the present invention maintains the state in which the ink occlusion body is capable of absorbing ink, so even if there is an irregular ink overflow under various operating environment conditions during storage and use, Ink leakage, such as dripping, is unlikely to occur, proper ink ejection, and an inexpensive structure with a small number of parts.

In this structure, when the air in the ink containing portion expands and the ink is forced to overflow from the ink containing portion during use, the overflow ink is supplied to the coating body and the ink through the ink communicating portion. It tries to go in both directions of the occlusion body, but since the coating body side has the highest density, the ink passage resistance is large and it is difficult to flow out.On the other hand, there is a space inside the ink occlusion body to absorb ink, and air exchange with the outside air. Since it can be made smooth, ink is preferentially supplied, and it is possible to prevent dripping from the coated body. When the air in the ink storage portion again contracts from the expanded state to the original state, the density is high and the capillary force is strong on the coating body side, so it is possible to prevent external air from being sucked into the ink communication portion or the ink storage portion from this direction. Therefore, the ink absorbed in the ink occlusion body is sucked back into the ink storage part, so that the ink occlusion body recovers the ability to absorb the ink again, and the ink leakage does not occur even in the repeated expansion / contraction environment. It does not happen.

The structure of the present invention has the above-mentioned effects,
As shown in the problem of the previous section, when aiming for a preferable oil-based ink filled product, at the same time as causing no ink leakage,
It is also necessary that the ink discharge amount is sufficient. But above,
The problem of (1) is generally a contradictory effect, and there is a relation that when one is improved, the other is deteriorated. That is, the measure for strengthening the capillary action of the ink communicating portion hinders the air suction (air exchange) to the ink containing portion during the ink consumption of the application body, leading to a problem that the ink discharge is reduced. Specifically, when forming the ink communicating portion, if the ink absorbing body is simply inserted into the ink communicating portion (inside the tube) in a compressed state or the rear portion of the porous capillary material coated body is press-fitted, the ink absorbing body or There are problems such as thin and thick outer diameter dimensions of the applicator itself and large and small variations in capillary density, and there is a problem such as insufficient ink ejection even if there is reliability against dripping.

According to the present invention, in order to harmonize the above-mentioned contradictory effects, the ink is formed by a fine gap formed between the uneven shape provided on the inner wall of the ink communicating portion and the outer wall of the ink conducting member facing this. It is also possible to form an air communication gap that communicates with the storage unit so that external air is sucked into the ink storage unit. That is, according to the present invention, since the inner wall surface of the ink communicating portion has an uneven shape, even if the rear part of the ink occlusion body or the application body which is an ink conducting member is compressed or press-fitted into the uneven shape portion, the unevenness of the uneven surface Since a capillary portion with a constant gap size is secured due to the relationship between the gap and the valley, even if there is variation in the ink conducting member, a stable capillary portion with little variation in the gap can be formed, and ink leakage and ink dischargeability Can be obtained.

[0010]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1 FIGS. 1 and 2 show Example 1 of the present invention. 1 is a vertical sectional view of the present embodiment, and FIG. 2 is an enlarged transverse sectional view of a main part of the present embodiment (AA ′ sectional view of FIG. 1). Reference numeral 1 is an ink container, the rear part of which is closed, and an outer tube 1a and an inner tube 1b.
It is surrounded by a double tube consisting of an outer tube 1a and an inner tube 1
The ink containing portion 1 is formed between b. Further, the front portion of the ink containing portion 1 is opened, and the inner wall of the outer tube 1a and the front shaft 2 are
And are press-fitted and fixed. A jaw 2a is arranged on the inner wall of the cylindrical front shaft 2, and the applicator 3 is inserted and fixed therein.

An ink communicating portion 4 is provided on the rear portion 3a of the coating body 3.
Are arranged and are connected to the rear portion 3a of the application body. Further, behind the ink communicating portion 4, a columnar ink occlusion body 5 is provided.
Are connected and fixed by the lid 6. Further, the lid 6 is provided with a rib 6a which communicates the ink storage body 5 with the outside air.

On the inner wall portion of the ink containing body tube 1b, a convex all-round rib 1c is arranged in the vicinity of the opening end face, and the ink communicating portion 4 is provided.
The density is higher than that of the ink occlusion body 5. The ink communicating portion 4 may use a separate member as long as it has a higher density than the ink occlusion body 5 and a lower density than the coating body 3.

A slit-like notch is formed on the opening end surface of the ink containing body tube 1b to form a connecting part 1d for connecting the ink communicating part 4 and the inside of the ink containing part 1. The shape of the connecting portion 1d is not limited to the slit shape and may be appropriately selected such as a through hole. Further, there is an ink flow passage 7 near the press-fitting portion of the front shaft 2 and the ink containing body outer tube 1a, and the ink passes from the ink containing portion 1 through the ink flow passage 7 and the connecting portion 1
The ink can be supplied to the ink communicating portion 4 via d.

As the ink occlusion body 5, sponge, polyester, acryl, or so-called batting in which acetate fibers are bundled may be used as appropriate so that ink is easily absorbed and discharged. Further, since the ink occlusion body 5 can be a general columnar member having a circular or rectangular cross section, instead of a tubular body, it is possible to use an ink occlusion body which is inexpensive to manufacture and easy to assemble.

The application action of the applicator described in this embodiment is as follows. Depending on the application, the ink in the capillary gap in the front part of the applicator is consumed, and the ink tries to be sucked out from the rear part of the applicator to replenish it. Move to the front of the applicator. Along with this, the ink in the ink containing portion passes through the ink flow passage and is replenished to the ink communicating portion through the connecting portion, so that the liquid-tight state in the ink communicating portion is recovered and ink discharge control is continued.

Since the density of the ink communicating portion is higher than that of the ink occlusion body, a strong capillary force acts locally to keep the ink and keep the liquid tight state. Therefore, as long as the ink is not consumed by the applicator, the liquid-tight state is maintained, and normally, the transfer and absorption of ink from the ink container to the occlusion body is suppressed (air exchange is suppressed. ). Therefore, the ink is not absorbed more than necessary by the ink occlusion body in the state of being left as it is, and the ink occlusion body can always secure a space in which the ink can be absorbed. Therefore, even if the air in the ink storage part expands and the ink is forced to overflow from the ink storage part, the overflowed ink does not go to the application destination and is absorbed by the ink occlusion body, so ink spillage from the application body does not occur. Can be prevented. When the air in the ink storage section is compressed again, the ink that has entered the ink storage section is sucked back by the reduced pressure in the ink storage section, so the ink storage section restores its ability to absorb ink again, and repeats expansion and contraction. However, ink leakage does not occur. Incidentally, in the present embodiment, the ink containing portion is a double tube consisting of the outer tube and the inner tube, and the ink occlusion body is housed in the inner tube. Therefore, the outer tube portion along the longitudinal direction is transparent. By using a material, it is possible to make a shaft design that makes it easy to check the amount of ink inside.

Embodiment 2 FIGS. 3 and 4 show Embodiment 2 of the present invention. 3 is a vertical sectional view of the present embodiment, and FIG. 4 is an enlarged transverse sectional view of a main part of the present embodiment (BB 'sectional view of FIG. 3). Example 2 Example 2 is the same as Example 1 except that the applicator of Example 1 was further covered with an outer shaft 8. The applicator according to the present embodiment forms a cylindrical outer shaft 8, and a rear portion of the outer shaft 8 is closed by press-fitting and fixing a lid 16. Lid 16
A rib 16a is arranged on the inner surface of the ink container 11 to fix the ink containing portion 11. Further, a vertical rib 8a is formed in the front portion of the outer shaft 8 in the axial longitudinal direction, and the rear end of the ink occlusion body 15 is
It communicates with the outside air through the rib 16a and the vertical rib 8a. The operation and effect of the applicator according to the present embodiment is similar to that of the applicator according to the first embodiment, but by disposing the outer shaft, the external airflow passage from the ink occlusion body is bypassed,
Even if ink leaks from the ink occlusion body, the path through which the ink leaks to the outside of the applicator is longer than that of the applicator of the first embodiment. Therefore, the structure is safer against ink leakage.

Embodiment 3 FIGS. 5 and 6 show Embodiment 3 of the present invention. 5 is a vertical sectional view of the present embodiment, and FIG. 6 is an enlarged transverse sectional view of a main part of the present embodiment (AA ′ sectional view of FIG. 5). Reference numeral 21 is an ink container, the rear part of which is closed, and the outer tube 21a and the inner tube 2 are
It is surrounded by a double tube composed of 1b and an ink containing portion 21 is formed between the outer tube 21a and the inner tube 21b. Further, the front portion of the ink containing portion 21 is open, and the outer tube 21
The inner wall a and the front shaft 22 are press-fitted and fixed. A jaw 22a is arranged on the inner wall of the cylindrical front shaft 22.
3 is inserted and fixed.

An ink communicating portion 24 is arranged at the rear portion 23a of the coating body 23 and is connected to the rear portion 23a of the coating body. The rear portion 24a of the ink communicating portion 24 has a convex cylindrical shape, and the rear portion 24a is inserted into the front portion of the column-shaped ink storage body 25 to be compression-connected to the ink storage body 25. Further, the rear portion of the ink occlusion body 25 has a lid 26
Is fixed by. The lid 26 has a cylindrical outer shaft 28.
The rear portion of the outer shaft 28 is closed by being press-fitted and fixed to the rear portion, and the outer shaft 28 is arranged so as to cover the ink containing portion 21 and the front shaft 22. A rib 26a is arranged on the lid 26 to fix the ink containing portion 21. Further, a vertical rib 28a is formed in the front portion of the outer shaft 28 in the axial longitudinal direction, and the ink occlusion body 25 communicates with the outside air via the rib 26a and the vertical rib 28a.

The ink communicating portion 24 uses a communicating porous body which is different from the ink absorbing body 25 and has a higher capillary force than the ink absorbing body 25 and a lower capillary force than the coating body 23. As a general method for adjusting the capillary force of the porous body, the capillary force can be increased by lowering the porosity of the communicating porous body, and conversely, the capillary force can be increased by increasing the porosity. Since it can be lowered, it may be appropriately adjusted according to the capillary force of the coating body 23 and the ink occlusion body 25. Further, as the porous body, an open cell body or a resin sintered body made of polyurethane resin, polyacetal resin, polyester resin, acrylic resin, nylon resin, polyethylene resin, polypropylene resin or the like can be used. In addition to the above-mentioned ones, a fiber bundle made of acrylic fiber, polyester fiber, nylon fiber or the like can be used for the ink communicating portion 24.

The opening end face of the ink containing body tube 21b is notched in a U-shape to form a connecting portion 21d for connecting the ink communicating portion 24 and the ink. In addition, an ink flow passage 27 is provided near the press-fitting portion of the front shaft 22 and the ink containing portion outer tube 21a, and ink passes from the ink containing portion 21 through the ink flow passage 27 and the connecting portion 21d to the ink communicating portion 24. Can be supplied to.

As the ink occlusion body 5, the same one as in Example 1 can be used.

The coating action of the applicator described in this embodiment is the same as that of the first embodiment, but since a separate communicating porous body is used as the ink communicating portion, it is easy to set the capillary force of the ink communicating portion. Is.

Embodiment 4 FIGS. 7 and 8 show Embodiment 4 of the present invention. FIG. 7 is a vertical sectional view of the present embodiment, and FIG. 8 is an enlarged transverse sectional view of a main portion of the present embodiment (BB 'sectional view of FIG. 7). The fourth embodiment is the same as the third embodiment, except that the ink communicating portion 34 has a slit-shaped ink communicating path 3 in which the inner cross-section of the ink communicating portion 34 extends 12 radially from the center.
Example 3 is the same as Example 3 except that a cylindrical molded product having a capillary having 4b is formed. The rear side wall portion 34c of the ink communicating portion 34 is press-fitted and fixed to the ink containing portion inner tube 31b. Further, the front side wall portion 34d of the ink communication portion 34 has an ink communication passage 34b exposed, and the ink communicates with the coating body 33 and the ink occlusion body 35 through the ink communication passage 34b. Further, as the above-mentioned molded product, polyacetal resin (including resin such as homopolymer and copolymer), polypropylene resin, nylon resin, polyester resin, etc. can be selected as a material, and its shape is made of plastic. It is possible to use a molded article having a capillary tube provided with through holes having an irregular cross section in the longitudinal direction, which is often used for a pen tip or the like. The shape of the through-hole having an irregular cross section may be appropriately adjusted according to the capillary force of the ink occlusion body and the coating body. The operation and effect of the applicator according to the present embodiment is similar to that of the first embodiment, but since the molded product is used as the ink communicating portion, a product having high dimensional accuracy can be obtained.

Embodiment 5 FIGS. 9 and 10 show Embodiment 5 of the present invention. 9 is a vertical cross-sectional view of this embodiment, and FIG. 10 is an enlarged cross-sectional view of a main part of this embodiment (CC 'cross-sectional view of FIG. 9). Example 5
Example 3 is the same as Example 3 except that a molded product having a groove-shaped ink communication passage 44b with a fine gap outside the cross section was used as the ink communication portion 44. As the molded product, the same material as in Example 4 can be used. The operation and effect of the applicator according to this embodiment is the same as that of the fourth embodiment.

Embodiment 6 FIGS. 11 and 12 show Embodiment 6 of the present invention. 11 is a vertical sectional view of the present embodiment, and FIG. 12 is an enlarged transverse sectional view of a main part of the present embodiment (a DD ′ sectional view of FIG. 11). Example 6 is the same as Example 3, except that the ink communicating portion 54 was formed into a cylindrical shape and was sized appropriately so that a capillary gap was formed between the ink communicating portion inner tube 51b.
Same as Example 3. Rear part 54a of the ink communication part 54
Has a convex conical shape, and is fixed by compression connection with the ink occlusion body 55. The working effect of the applicator according to the present embodiment is the same as that of the third embodiment, except that the member arranged in the ink communicating portion can be manufactured at a lower cost by using a simple shape.

Embodiment 7 FIGS. 13, 14 and 15 show Embodiment 7 of the present invention. FIG. 13 is a vertical sectional view of this embodiment, and FIG. 14 is A of FIG.
FIG. 15 is a lateral cross-sectional view taken along the line AA, and FIG. 15 is an enlarged vertical cross-sectional view of an essential part of the ink communicating portion of the present embodiment. Reference numeral 61 is an ink containing portion, which is surrounded by a double tube composed of an outer tube 61a and an inner tube 61b, and is closed at the rear part (upper side in the figure), so that ink can be stored between the outer tube 61a and the inner tube 61b. Filling. Further, the front portion of the ink containing portion 61 is opened, the outer diameter of the cylindrical front shaft 62 is fixed to the inner wall of the outer tube 61a, and the applicator 63 is press-fitted and fixed to the jaw portion 62a.

The tip portion of the inner tube 61b is used as an ink communicating portion 64, and the rear portion 63a of the applicator 63 is connected to the tip portion of the ink communicating portion 64. The inner wall of the ink communicating portion 64 has a shallow female screw. The concavo-convex shape 64e is formed by the communication groove of the spiral shape, and the front portion of the columnar ink occlusion body 65 inserted from the rear side of the inner tube 61b is inserted into the ink conduction member 69. Internal diameter of the communicating groove 64e of the female screw spiral (thread portion 64
e1) has a relationship smaller than the outer diameter of the ink occlusion body 65, and the front part of the ink occlusion body 65 is compressed to increase the density and strengthen the capillary action, and at the same time, the ink conduction member 69 and the valley diameter 64e2 of the female screw spiral. Since a fine air communication gap k is inserted between the two, the fine air communication gap k is formed.
Connects the inside of the ink containing portion 61 and the rear of the inner tube 61b, and has a strong capillary action.

The inner pipe 61b is provided with a vertical rib 61e extending from the rear end portion to the rear portion of the ink communicating portion.
Due to the e, the side surface of the ink occlusion body 65 forms a ventilation gap 61f between itself and the inner wall of the inner tube 61b.
1f communicates with the minute air communication gap k. The rear end of the ink occlusion body 65 is fixed by a lid 66. The lid 66 closes the rear portion of the outer shaft 68 by being press-fitted and fixed to the rear portion of the tubular outer shaft 68.
Accommodates the ink containing portion 61 and the front shaft 62. The lid 66 has a rib 66 a for fixing the ink containing portion 61. Further, a vertical rib 68a is formed on the front portion of the outer shaft 68 in the axial longitudinal direction. Therefore, the ink occlusion body 6
Around 5 is a ventilation gap 61f, ribs 66a and vertical ribs 68a.
It communicates with outside air through and.

The fine air communication gap k between the ink conducting member 69 compressed by inserting the ink occlusion body 65 into the ink communicating portion 64 and the valley portion 64e2 of the female screw-shaped spiral is formed by the coating body 6
Although the capillary force is lower than that of No. 3, the capillary force is higher than the average capillary force in the ink occlusion body 65. The opening end surface of the ink communicating portion 64 is provided with a V-shaped notched connecting portion 61d, and the end surface of the inserted ink occlusion body 65 is in contact with the ink in the ink containing portion 61. Further, there is an ink flow passage 67 near the press-fitting portion of the front shaft 62 and the outer tube 61a,
Ink can be supplied from the inside of the ink containing portion 61 to the ink conducting member 69 inserted into the ink communicating portion 64 through the ink flow passage 67 and the connecting portion 61d. In the present embodiment, the ink conducting member is formed by compressing the front portion of the ink occlusion body, but another member may be used.

As the ink occlusion body 5, the same one as in Example 1 can be used.

The application action of the applicator described in this example is the same as that in Example 1, but the details are as follows. During application, the absorbed ink in the capillaries in the applicator is consumed, so in order to replenish it, the ink is sucked out from the rear part of the applicator, and the capillary osmotic pressure reduces the pressure in the ink container. , The ink in the ink communication part moves into the coating body. At this time, if a large amount of ink is present in the ink storage body, it is replenished from the ink storage body, but when the ink in the ink storage body is low, Air is sucked into the ink communicating portion. On the other hand, since the ink in the ink containing portion passes through the ink flow passage and contacts the ink communicating portion via the ink connecting portion, the air sucked into the ink communicating portion is replaced with the ink (air exchange). )
The action occurs, and the ink in the ink containing portion is continuously discharged and consumed.

In the ink occlusion body in which the amount of ink has been reduced by coating, there are many empty capillaries (here, if there is no control, the ink in the ink containing section is naturally absorbed, Ink will fill up.The phenomenon that such natural absorption progresses is related to the fact that external air is sucked into the ink storage section (air exchange).
The ink communicating portion of this embodiment is formed by compressing the front end portion of the ink occlusion body by the mountain diameter of the ink communicating portion (tube portion), and is formed by the female screw-like spiral groove provided in the pipe wall of the communicating portion. Since the air communication gap is also a gap in which a stronger capillary action works than the average capillary of the ink occlusion body, air exchange which is in a front-back relationship when the ink occlusion body sucks out ink is suppressed. Therefore, in the steady state, the ink occlusion body keeps the ink shortage, and when the ink in the ink storage section overflows due to changes in the operating environment, it is possible to absorb the ink and prevent it from dropping. Can be prevented.

This action occurs because the density (or capillary force) of the ink communicating portion is higher than the average density (or capillary force) in the ink occlusion body. This is because it has been taken in and always tries to maintain a liquid-tight state. In this liquid-tight state, the external air is exchanged with the air because the empty capillaries are increased in the ink occlusion body, and the strength of a part of the capillaries in the ink occlusion body and the capillaries of the ink communicating part. When the ink is balanced and when the ink is consumed by the coating material that has a higher density (or capillary force) than the ink communication part. At this time, the liquid-tight equilibrium is broken and air is exchanged. Is. Therefore, in the case other than this state, the ink in the ink containing portion is prevented from moving to the ink occlusion body.

Therefore, when the ink storage member is left in a natural state, the ink occlusion body always has a space capable of absorbing the ink, so that the air in the ink storage portion expands due to the temperature change and the ink is forced to overflow from the ink storage portion. Even if there is, since the ink occlusion body absorbs the ink before it drops from the application destination, it is possible to prevent the ink from falling from the application body. When the air in the ink storage section contracts again, the ink in the ink storage section is sucked back due to the reduced pressure in the ink storage section, and the ink in the ink storage section is consumed first during the application, so the ink is removed again. The ability to absorb is restored, and ink leakage is less likely to occur even after repeated expansion and contraction.

Such an action is also suitable for oil-based inks composed of solvents such as alcohols, ketones, esters, ethers, aromatic hydrocarbons and aliphatic hydrocarbons. Since the fine gaps are accurately formed by the grooves, it is possible to properly inhale the air and move the ink to the ink storage part in response to the ink discharge consumption of the coating material, and to prevent the ink dischargeability and ink leakage. A preferable writing instrument is obtained.

Example 8 Example 8 of the present invention is shown in FIG. In this embodiment, the uneven shape provided on the inner wall of the ink communicating portion 74 in Embodiment 7 is
Example 7 is the same as Example 7 except that it is formed by an inclined convex rib. The inner wall portion of the ink communicating portion 74 is provided with a plurality of inclined convex ribs 74e1 (the step difference between the convex portion and the tube wall is 150 micrometers or less) parallel to each other as a communicating groove, and the ink occlusion body (not shown). ) Is compressed and inserted. A fine air communication gap (not shown) is formed between the inner surface and the side surface of the compressed portion (ink conducting member) of the ink occlusion body by the convex ribs 74e1. As in Example 7, the ventilation gap on the rear side surface of the inner tube communicates with the inside of the ink containing portion. As in Example 7, this fine air communication gap is formed to have a stronger capillary force than the average capillary in the ink occlusion body and a weaker state than the capillary of the applicator, so the capillary in the ink occlusion body is Natural absorption is suppressed until the ink in the ink storage section is constantly filled up, leaving many empty capillary sections that can absorb ink. Therefore, the working effect of the applicator according to the present embodiment is similar to that of the seventh embodiment.

Embodiment 9 FIG. 17 shows Embodiment 9 of the present invention. In this embodiment, the uneven shape provided on the inner wall of the ink communicating portion 84 in Embodiment 7 is
Example 7 is the same as Example 7 except that it is formed by vertical, horizontal, and diagonal convex ribs (84e0, 84e1). Due to the gap groove k between the convex ribs (84e0, 84e1), a fine air communication gap (not shown) is provided between the inner surface and the side surface of the compressed portion (ink conducting member) of the ink occlusion body (not shown).
The minute air communication gap communicates the ventilation gap on the rear side surface of the inner tube with the inside of the ink containing portion, as in the seventh embodiment. The working effect of the applicator according to the present embodiment is
Same as Example 7.

[0039]

INDUSTRIAL APPLICABILITY The applicator according to the present invention is capable of preventing ink leakage, such as spillage, under storage or under various operating environment conditions, regardless of whether water-based ink or oil-based ink is used. In addition, the quality of ink can be maintained appropriately, and the amount of ink remaining in the shaft can be easily confirmed from the external appearance, and it can be manufactured practically at low cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment.

FIG. 2 is a sectional view taken along the line A-A ′ in FIG.

FIG. 3 is a vertical sectional view of a second embodiment.

FIG. 4 is a sectional view taken along line B-B ′ of FIG.

FIG. 5 is a vertical sectional view of a third embodiment.

6 is a cross-sectional view taken along the line A-A ′ of FIG.

FIG. 7 is a vertical sectional view of a fourth embodiment.

8 is a sectional view taken along line B-B ′ of FIG. 7.

FIG. 9 is a vertical sectional view of a fifth embodiment.

10 is a cross-sectional view taken along the line C-C ′ of FIG.

FIG. 11 is a vertical cross-sectional view of Example 6.

FIG. 12 is a cross-sectional view taken along the line D-D ′ of FIG. 11.

FIG. 13 is a vertical cross-sectional view of Example 7.

14 is a cross-sectional view taken along the line A-A ′ of FIG.

FIG. 15 is an enlarged cross-sectional view of a main part of an ink communicating portion according to a seventh embodiment.

FIG. 16 is an enlarged cross-sectional view of an essential part of an ink communicating portion according to an eighth embodiment.

FIG. 17 is an enlarged cross-sectional view of a main part of an ink communicating portion according to a ninth embodiment.

[Explanation of symbols]

1 Ink storage 11 Ink storage 21 Ink storage part 61 Ink storage section 3 Application body 23 Applicator 33 Applicator 63 Applicator 4 Ink communication section 34 Ink communication part 24 Ink communication part 34 Ink communication part 44 Ink communication part 54 Ink communication section 64 ink communication section 74 Ink communication part 84 Ink communication section 5 Ink absorber 15 Ink absorber 25 Ink absorber 35 Ink storage material 55 Ink absorber 65 Ink absorber

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2C350 GA04 HA15 KC02 KC11 KC12                       NA10 NC21 NC30 NC48 NE05                 3E014 PA01 PB03 PB07 PC03 PC06                       PE25 PF09 PF10

Claims (5)

[Claims] 1. An ink occlusion body in which a front side of the ink occlusion body is connected to one end of the ink communication part, an application body is connected to the other end of the ink communication part, and the ink communication part and the ink storage part are connected. The rear side communicates with the outside air, and the density (or capillary force) of the ink communicating portion is higher than the ink occlusion body density (or capillary force) and smaller than the application body density (or capillary force). Applicator to do. 2. The ink containing portion is a double-walled tube composed of an outer tube and an inner tube, and an ink containing portion is provided between the outer tube and the inner tube.
The applicator according to claim 1, wherein the ink occlusion bodies are arranged in parallel in the longitudinal direction inside the inner tube. 3. The applicator according to claim 1, wherein the ink communicating portion is a communicating porous body that is a separate body from the ink storage body. 4. The applicator according to claim 1 or 2, wherein the ink communicating portion is a molded product having fine through holes provided therein in a longitudinal direction. 5. A fine gap, which is an air communication gap communicating with the ink containing portion, is formed between the inner wall of the ink communicating portion and the outer wall of the ink conducting member facing the inner wall by forming an uneven shape. The applicator according to claim 1 or 2.