JP2001171283A - Collector type writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument for solving problems of diffusing or a direct flow at an abrupt pressurizing or pressure reducing of a conventional collector type writing instrument or a problem of visibility of the ink of an internal component. SOLUTION: The collector type writing instrument comprises a collector for temporarily storing the ink when an internal pressure is changed, and an ink tank for containing the ink and divided into substantially divided partitions and a snorkel having a vent part capable of ventilating spaces at the front and the rear of the partition or an ink occlusion material for reducing a tank inner volume. In this case, the snorkel or the occlusion material is formed of a component having high transparency. Further, the surface roughness Ra of the snorkel or the occlusion material is Ra=0.8a or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink tank for directly storing ink such as a ball-point pen, a felt-tip pen, a marker, a fountain pen, and a small-tube type writing instrument having a writing portion at its tip, and a groove-shaped adjustment for absorbing internal pressure changes. The present invention relates to an improvement in a so-called collector-type writing instrument having a collector as a body. In particular, it relates to the improvement of the mechanism that solves the problem of blowout and direct current when using collector type writing instruments in environments with sudden pressure changes such as use in aircraft, and the appearance defect when parts enter the ink tank. .

[0002]

2. Description of the Related Art While the ink 2 in a direct liquid state is built in by adjusting the pressure in an ink tank 3 between a conventionally existing pen tip 1 and an ink tank 3, ink leakage from the tip 9 of the pen tip 1 is prevented. There is known a writing instrument provided with a collector 6 which is an internal pressure regulator for preventing air from blowing out from an air hole 10. The collector-type writing instrument temporarily holds the ink 2 having a relatively low viscosity from the inside of the ink tank 3 to a fiber using a holding groove 13 or a capillary provided in the collector 6 or returns the ink 2 to the ink tank 3. To maintain a state in which the pen tip is not affected by the pressure change. The collector-type writing implement has a large flow rate of ink, can secure a stable writing flow rate to the end, and has excellent performance of visually confirming the remaining amount of the ink 2 from the appearance.

However, since the collector type writing instrument directly incorporates the ink 2 and puts the ink 2 in and out of the collector 6, the ink 2 is retained in an environment in which the maximum holding capacity, which is the internal pressure adjustment capacity limit of the collector 6, is exceeded. There is a serious disadvantage that the space is exhausted and the ink 2 comes out from the air hole 10 of the writing instrument to the outside and stains fingers and clothes. In order to solve this problem or to improve the safety even a little, measures such as increasing the capacity of the collector 6 and reducing the size of the ink tank 3 can be considered. A collector having a collector capacity that does not blow out when used under a general environment such as a gradual temperature change is already on the market.

[0004] Even in the present situation, the collector-type writing implement has a slightly thick shaft in consideration of safety. If the diameter is larger than this, there is a problem that it is difficult to grasp and the appearance is not smart.
When the size of the ink tank 3 is reduced, the amount of ink is reduced and the life is shortened. When the collector 6 is lengthened, the ink head H on the pen tip 1 is
To the height of the pen tip 9 from the normal collector 6
When the length of is increased, the ink head H becomes high, and a direct current is generated in which the ink 2 leaks from the front end 9.

Further, when the cap is opened at about 1 atmosphere above the ground and the cap is opened in a state where the pressure inside the aircraft is changed to about 0.8 atmosphere, the inside of the pen body becomes 1 inch.
Since the ink 2 is instantaneously exposed to the state of about 0.8 atm from the state of being balanced by the atmospheric pressure and the inside ink 2 is rapidly jetted around the air groove of the collector 6, the ink is sufficiently filled in the entire holding groove 13. 2 cannot be held, and the ink 2 is ejected from the air holes 10. For the purpose of solving the problem of the blowing in the state of the change in the atmospheric pressure, the inventions and inventions such as Japanese Utility Model Publication No. 3-31580, Japanese Utility Model Publication No. 3-31581, and Japanese Patent Application Laid-Open No. 9-104194 have been made. However, these have only an effect that the jet does not directly reach the air holes, and cannot be said to be sufficient, and the present inventors have disclosed in Japanese Patent Application Nos.
Japanese Patent Application Nos.-167808 and 10-262267 have been proposed, but more effective improvements and solutions using different means have been desired.

Japanese Patent Application Laid-Open No. Hei 4-227886 discloses an invention using an air supply pipe or the like. However, in the conventional invention, writing cannot be continuously performed unless ink is supplied by turning the pen body upward. However, there is a problem that only half the amount of ink can be supplied to the consumer, and it is necessary to explain to the consumer about such handling or a case where the amount of ink is small from the beginning. There is no need to explain to consumers at all, especially in the environment of repeated rapid pressurization and decompression, such as when changing airplanes or in front of a heater from low-temperature outside air. In addition to effective measures, there is a need for an excellent direct liquid collector-type writing implement that uses low-viscosity ink 2 while maintaining good writing characteristics.

In the collector-type writing instrument, when the ink 2 is consumed during writing, outside air is taken in from the gas-liquid exchange section 18 to the ink tank 3 side so that the inside is not depressurized. A space that allows air bubbles to move freely is required. Conventional actual opening 59
Ink tank 3 as seen in
In the case where solid matter such as the ink occluding body 31 is provided in a dense state behind the collector 6, the bubbles generated from the gas-liquid exchanging section 18 cause the ink occluding body 31 in a state wet with the ink 2 without resistance. If it does not pass, the ink occluding body 31 itself becomes the second gas-liquid exchanging section, so that the internal pressure inside the writing instrument is reduced, and writing problems such as fraying occur.

In order to solve the above-mentioned problem, it is necessary to take measures such as providing a bubble passage portion having a shape that does not seal the ink occluding body 31, but the gas-liquid exchange portion 18 of the collector 6 is required. Usually, there is a problem that the position of the gas-liquid exchanging section 18 and the position of the bubble passage section of the ink occluding body 31 must be properly assembled, and a part such as a snorkel 25 is provided behind the assembly. In addition to the above-mentioned positioning problem, there is a problem of positioning the snorkel 25 with the ventilation portion 27. Thus, the diameter of the built-in ink occluding body 31 and the snorkel 25 is made small so that the ink 2 can enter and leave around the small diameter. In this case, it is necessary to increase the length of the built-in component for a portion that is slightly thinner. However, since the inside can be seen even when the ink 2 is completely depleted, if the above-described component is wet with the ink 2, Since appearance problems such as an illusion that the ink 2 still appears to be left occur, it is required to solve these problems.

[0009] The collector-type writing instrument has a problem that the writing cannot be performed suddenly when the ink 2 runs out. Therefore, when the amount of ink is small, there is also a problem that a spare writing instrument needs to be carried. After a certain amount of flow continues and the last ink 2 becomes invisible, the memo level can be written for a short period of time. Ink drops on the pen tip which makes it difficult to write when stored for an extended period of time upwards, and the amount of ink spilled during writing is equal to or greater than the initial value of the conventional batting type, and the collector continues until almost no ink is left Due to the characteristics of the writing instrument, the writing life is shortened even with the same amount of ink loaded. A problem that there is no, there is a need to resolve the like.

[0010]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve a collector type writing instrument which is widely used.
Absorption of the pressure inside the ink tank 3 due to temperature change or atmospheric pressure change absorbs the direct current that the ink 2 leaks from the tip 9 of the pen tip 1 or the ink 2 comes out from the air hole 10 because the pressure adjustment capability of the collector 6 is exceeded It is desired to solve the problem of providing a writing instrument that prevents a serious accident that stains a consumer's clothes and fingers due to a balloon that does not take a special use or other structure.

In particular, it is desired to solve the drawbacks of the collector-type writing instrument that is easily blown out for use in an aircraft or in an environment where temperature changes are intense. It is a first object of the present invention to solve the problem of providing an inexpensive collector-type writing instrument that solves the above-mentioned problems while maintaining the appearance of the expression and the writing distance (life).

Further, when parts such as the ink occluding body 31 and the snorkel 25 are added as a means for solving the above-mentioned problem, while securing a flow path which does not restrict the flow of ink and the passage of air bubbles, the parts are contained. It is a second object of the present invention to provide a writing instrument having a configuration that does not affect the confirmability of the remaining ink amount, particularly the appearance problem that the remaining ink amount cannot be confirmed. If the problem of end writing property and the problem of ink drop can be solved, a more effective writing instrument can be provided.

[0013]

In general, a collector-type writing instrument has a pen tip 1 having a writing portion 9 at the tip and a low-viscosity (100 mPa · s or less) ink 2 flowing from an ink tank 3 to a writing portion 9. Ink guide core to be secured (such as middle core 7 and collector core 8) or slit of collector 6 (longitudinal groove 1)
A ball-point pen, a fountain pen, a small tube-type writing instrument having ink guiding means such as a case where the tip is extended to the front end, and a pen or a marker which becomes the pen tip 1 itself.

[0014] Between the pen tip and the bottomed cup-shaped ink tank 3 combined with or integrated with another part such as a tail plug,
A plurality of retaining grooves 13 (generally, a gap between the plurality of wings 12), an air groove 15 communicating with the outside air, and thin vertical grooves 14 for communicating ink between the retaining grooves 13 are provided. A collector 6 for holding the ink 2 using capillary force, such as a bundle, is provided, and a sufficiently small gas-liquid exchange section 18 provided on the collector 6 is wetted with the ink 2 so that the ink tank 3 The outside air is shut off and the outside air cannot flow into the ink tank 3 except for the gas-liquid exchange section 18.

In the present invention, the configuration of the general collector writing implement described above is provided. First, as an effective means of the present invention, the air in the ink tank 3 at the time when the ink 2 is consumed to some extent is used in an aircraft. When the pen tip is turned down at the time of use or the like, the ventilation portion 27 for preventing the pressure from being applied to the ink 2 by removing the rear expanded air to the collector 6 inside the ink tank 3 is integrated or combined with parts. Is provided. In addition, the snorkel 25 is provided with a partition part 26 that substantially or integrally separates the ink tank 6 so as to facilitate ventilation from the ventilation part 27 of the snorkel 25. The partitioning section 26 is provided with an ink conducting section 30 having a size that is more difficult to ventilate than the ventilation section 27.

When the outside air, which has been replaced by air from the gas-liquid exchange section 18 of the collector 6 during writing, flows into the ink tank 3 as bubbles, the ink occluding body 31 and the snorkel 2
It is desirable to provide an air gap 42 between the collector 6 and the snorkel 25 so that air bubbles can be moved to the rear space with little resistance by 5 or the like. The void portion 42 also serves as an air passage for releasing a relatively high internal pressure when the periphery of the writing instrument is in a relatively reduced pressure state.

As an effective first means of the present invention, the ink tank 3 is formed of a resin that can be visually recognized inside, and the snorkel 25 is made of a transparent or translucent material at least partially, preferably almost entirely. It was molded with. Even if the material is translucent resin, the visibility inside will be worse if the wall thickness is thick, and even if the material is slightly poor in transparency, it will be possible to see the inside if it is made extremely thin. From this, it was found that there was no problem if the light transmittance in consideration of the wall thickness was 40% or more. As a specific means, the snorkel 25 is made of transparent ABS, AS, PS, PP, PE, PET, PC, transparent PA, etc. and those obtained by kneading various additives such as a surfactant, and various alloys. In any case, it is formed of a transparent or translucent material having ink resistance.

As an effective second means of the present invention, the ink connected to the cores 7, 8 or the vertical grooves 14 so that the ink 2 can be guided from the ink tank 3 to the pen tip 1 inside the ink tank 3. An ink occluding body 31 such as a batting, a sponge, a fiber bundle, or a foam that can be held was incorporated. Ink occlusion body 31
Are located at least behind the approximate center of the ink tank 3, and can absorb the ink 2 from at least both the front and the back of the ink occluding body 31. As the ink occluding body 31, a batting obtained by winding a fiber bundle core, a soft fiber, or an open-cell sponge obtained by fixing and molding general fibers with an adhesive or heat, with a non-liquid-absorbing outer skin can be used. Effectively ink 2
It is desired to appropriately select a means such as reducing the capillary force as compared with the cores 7 and 8 in order to consume this.

As a third effective means of the present invention, a transparent or translucent material having a light transmittance of at least 40% over at least a part thereof, preferably substantially the entirety of the ink occluding body 31 is preferably used. It was molded with. The ink occluding body 31 is usually a bundle of fibers, an outer skin provided on the outside thereof, a sponge, or a space having a large space shaped by heat or an adhesive. Specifically, the ink occluding body 31 is made of acrylic (PMMA), polyester (PE
T), materials using fibers or foams such as transparent ABS, AS, PS, PP, PE, PC, transparent PA, etc., and various alloys can be used.
Light transmittance of 4 when wet with ink or without ink
It is made of a material that is 0% or more. Although the ink occluding body 31 is usually thick, it has a large amount of space inside, and if the material used is transparent, the ink 2 inside can usually be seen through or the ink 2 disappears, and Is so thin that the loss of the ink 2 in the fiber bundle or the like becomes visible, so that there is little need to consider the wall thickness.

As a fourth means of the present invention, when the ink occluding body 31 and the snorkel 25 are incorporated, and one of them is made of an opaque material having a light transmittance of 40% or less, The opaque member is made of a material having a color different from the ink color or a color different from the ink color, and the other transparent member has an arithmetic average roughness Ra of 0. It has a smooth surface of 8a (unit μm) or less, preferably 0.2a or less. This smooth surface desirably has its internal components preferably satisfy the above-mentioned surface roughness, but it is necessary that at least a part of the portion visible from the outside satisfy this surface roughness. .

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 to 3 show an embodiment of the present invention, FIG. 4 shows a conventional example, and the present invention will be described in detail below.

As shown in the drawing, a writing instrument according to a first embodiment of the present invention has a pen tip 1 having a writing portion 9 of a ball at the tip.
A ball-point pen having ink guiding means for the core 7 and the collector core 8 as an ink guiding core for securing a flow path of the ink 2 from the ink tank 3 to the writing section 9. As described above, the nib 1 of various writing tools such as a felt-tip pen, a fountain pen, and a small tube-type writing tool can be applied to the nib 1. A plurality of wings 12 are provided between the bottomed cup-shaped ink tank 3 and the pen tip 1 in combination with a component such as a single piece or a tail plug to make the gap function as a plurality of retaining grooves 13 and to the outside air. This is a so-called collector-type writing instrument provided with a collector 6 having a narrow vertical groove 14 for communicating ink between the communicating air groove 15 and each of the retaining grooves 13. In any case, the collector 6 temporarily retains a change due to pressurization and decompression due to the balance of capillary force, such as one using a conventional lateral holding blade 12 or one using cotton or the like. And a function of using the small-diameter meniscus mechanism of the gas-liquid exchange section 18 to relatively reduce the pressure inside the ink tank 6 and prevent the ink head H from being applied to the inside of the pen tip 1. is there.

As shown in FIG. 4, in a conventional collector writing instrument, ink 2 in a direct liquid state is stored in an ink tank 3 and a gas-liquid exchange section 18 of a sufficiently small size provided in a collector 6 is provided. Wetting with the ink 2 shuts off the ink tank 3 and the outside air, and
Otherwise, the structure is such that outside air cannot flow through the inside of the ink tank 3. The collector 6 is usually a plasma treatment, a chemical treatment such as a mixed solution of chromium sulfate, a kneading of a soap component or the like which is easily wettable in a molding resin, etc. do. Other cutler 5, joint 4, cap (not shown), ink 2 and the like are not particularly limited by the present invention, and those conventionally used can be appropriately selected. Similarly, the ink 2 has various solvents such as water, alcohol, xylene, various glycol-type agents, various ether solvents, pigment inks and dye inks as dyes, and has some viscosity and pseudoplasticity. Any ink that can be used as a collector-type writing instrument, such as a used ink, can be appropriately selected.

Each of the collector writing instruments has a function of preventing the ink 2 in a direct liquid state from leaking from the inside by using a function of balancing against pressure change. When the internal pressure inside the ink tank 3 changes, the gas-liquid exchange unit 18
The ink 2 enters the holding groove 13 of the collector 6 through the collector, and the air from the gas-liquid exchange unit 18 enters the tank 3 to balance the internal pressure. The ink tank 3 by the meniscus of the gas-liquid exchange unit 18 which hardly takes any action other than the ink head H
Direct current from the pen tip 1 is prevented by a mechanism that substantially reduces the pressure on the side compared to the outside air. If the size of the gas-liquid exchanging unit 18 is reduced, the internal pressure can be reduced and ink leakage can be easily prevented, but at the same time, it becomes difficult for ink to flow even when writing. The size is generally about 0.05 mm to 0.2 mm. The gas-liquid exchange part 18 has a groove shape,
In the case where the core, which is the fiber bundle core, or the collector is provided with cotton, the gap between the fibers becomes the gas-liquid exchange unit 18.

[0025] The ink tank 3 is used by ink consumption during writing.
When the amount of the ink 2 inside is a little larger than the maximum holdable amount of the collector 6, the change in the internal pressure of the ink tank 3 is the largest, and the expansion and contraction of the air inside the tank 3 due to the change in the pressure of the outside air and the change in the temperature. Even in some cases, the conventional collector writing implement is designed so that the collector 6 is not filled with the ink 2 and the ink 2 does not blow out from the air holes 10. Generally, it has been found that there is a correlation between the size of the ink tank 3 and the maximum ink holding capacity i of the collector 6, and it has been conventionally known that the maximum ink holding capacity i is about 10% to 30% of the ink tank volume. It is designed to have an ink storage volume.

If the maximum ink holding volume is set to a large ratio as compared with the size of the ink tank 3, the safety concerning the blowing is improved, but if the length of the collector 6 is too long, it is applied to the pen tip 1. Ink head H
And the problem of direct current from the pen tip occurs. When the diameter of the collector 6 is increased, the shaft size becomes large, which tends to affect the problem of the thickness of the grip portion and the smart appearance. Also, if the ink tank 3 is made smaller, the ink capacity is reduced, and there is a problem that the writing distance becomes shorter. Therefore, an auxiliary holding groove 17 added to the main portion holding groove 16 as shown in FIG. Head H
Applicants have also invented an increase in the collector capacity without increasing the collector capacity.

However, as in aircraft use,
When repeatedly used between about 1 atm above the ground and about 0.8 atm during flight, the ink that suddenly enters the collector 6 becomes a jet flow in the collector-type writing instrument and is sufficiently retained. When the outside air is suddenly pressurized or when the outside air is suddenly pressurized, only the air enters the tank 3 without returning the ink 2 in the collector 6 to the tank 3. In particular, when these steps are repeated, the retaining groove 13 of the collector 6 becomes the ink 2
However, it has been desired to eliminate the drawbacks caused by the phenomenon in which the retained ink is sequentially increased and ejected in a state where the retained ink is increased, or the ink that is not ejected is ejected even if the temperature rises slightly about the body temperature.

In the embodiment of the present invention, as an effective configuration,
First, a snorkel 25 is provided that bleeds air from the upper portion (rear portion of the ink tank) when the ink tank 3 is substantially divided and the pen tip 1 faces downward, and leaves the ink 2 inside the tank 3 as much as possible. The snorkel 25 has a partition 26 that divides the ink tank 3 and a ventilation section 2 that is a tubular ventilation path.
As shown in FIG. 2, a front opening 28 that opens to the rear end side of the collector 6 and a rear opening 29 that opens near the center of the ink tank 3 or more rearward are ventilated by the ventilation part 27. The partition 26 is press-fitted into the inner wall of the ink tank 3 and is substantially divided into a front tank 37 and a rear tank 38.
The partition portion 26 is provided with one ink conducting portion 30 which is a groove or a hole sufficiently smaller than the size of the ventilation portion 27 (preferably, a plurality of portions having a size smaller than the ventilation portion 27).

With such a configuration, when the temperature of the pen tip 1 is lowered and the temperature is slowly increased while the amount of ink is reduced, the ink 2 in the ink tank 3 is separated from the partitioning portion. It is movable from the side of the rear tank 38 defined by 26 to the side of the front tank 27 through the ink conducting section 30. In other words, since the tank 3 is practically divided by the partition 26 but is not blocked by the ink introduction unit 30, it is possible to continuously write or move the ink 2 to the collector 6 side. It is possible. Even in actual trial production, it was confirmed that the ink 2 moved to the front tank 27 side in the writing state. In such a state of slowly changing pressure and temperature, by providing a general collector 6 or the like which has no problem with the conventional collector type, the ink retaining ability of the collector 6 can be sufficiently exhibited.

In use on an aircraft or between low and high temperature environments, the ink 2 is moved while being sealed with a cap for preventing the internal ink 2 from volatilizing. In the case of use on an aircraft as an example, it is usually used on the ground at about 1 atm, and is capped at the pressure inside the ink tank 3 corresponding to the 1 atm to maintain the internal pressure state. When using a writing instrument on an airplane with the pressure reduced to about 0.8 atm, open the cap first. At this time, the internal pressure of the writing instrument is rapidly released from a state of about 1 atm to an environment of 0.8 atm, and the internal pressure of the ink tank 3 via the gas-liquid exchange section 18 is relatively higher than the air pressure in the aircraft. Therefore, in the conventional collector writing implement, the ink 2 is rapidly ejected as a jet in the collector 6.

In the configuration of the present invention, the air inside the tank 3 in a state where the internal pressure is relatively high can be preferentially released to the collector 6 side by the ventilation portion 27. Front tank 3
The ink 2 around 7 also flows in at the same time, but its capacity is sufficiently small, and it is possible to prevent blowing. Ink 2 spilled by writing in normal use
In general, the same amount of air as air bubbles enters the ink tank 3 side from the gas-liquid exchange unit 18 and is usually stored upward in a pocket or stored sideways in a bag when capped. In many cases, the front tank 37 is a space, and has a configuration in which there is a high possibility that there is almost no ink 2 flowing into the collector 6 at the time of sudden pressurization and depressurization, that is, a state where it is difficult to blow out.

When there is a rapid movement of the ink 2 or air inside the writing instrument, the ink 2 cannot reach the collector 6 directly by the partitioning portion 26, and the size of the ventilation portion 27 is smaller than that of the ventilation portion 27. If there is a sufficient difference in the flow path resistance between the ink conducting portions 30, the more rapid the movement, the more the ink 2 or the air flows more easily. Even with the same size passage for ink and air, air is much easier to flow. In other words, in a rapid change, the flow resistance is much smaller when the air escapes from the ventilation part 27 opened into the space than when the ink 2 flows through the ink conducting part 30 that is wet with the ink 2 in the downward state. As a result, almost only air flows to the collector 6 side when the pressure is suddenly increased or decreased.

Further, in the structure of the present invention, the ink tank 3
In order to incorporate the parts immersed in the ink 2 inside,
In a state where the ink 2 adheres to those parts, a problem may occur in which the appearance as if the ink 2 still remains may occur. In order to solve the problem of the appearance, it was found that if the snorkel 25 is formed of a transparent material, even if a small amount of the ink 2 is adhered, it can be visually recognized that the ink 2 is gone. In other words, even when all of the ink 2 runs out, the ink 2 has a certain degree of transparency,
It was found that the internal components themselves were particularly visible if they had light transmissivity. However, by examining the materials already mentioned, such as PP and transparent ABS, it was found that visibility could be determined by specifying the light transmittance. Was done. Specifically, if the light transmittance is 40% or more, the illusion phenomenon that the ink 2 seems to remain without any practical problem does not occur. If the light transmittance is 80% or more, parts such as the snorkel 25 and the like inside the ink tank 3 are not provided. The visibility is so good that the judgment cannot be made unless the entrance is carefully observed.

A second characteristic configuration is that the storage body 31 capable of holding ink is provided together with the snorkel 25 described above. The present inventor has already provided the ink occluding body 31 in the ink tank 3, so that if the ink 2 is consumed and a space is created in the ink tank 3 without reducing the amount of the ink 2, the volume of the space is reduced. (Japanese Patent Application Nos. 10-135914 and 167)
808). In response to the invention of the prior application, the ink occluding body 31 has a non-liquid absorbing outer skin 35.

The ink tank 3 is usually made of PP, PE, PE in consideration of the visibility of the remaining amount of ink and the prevention of ink volatilization.
It is molded with a transparent resin such as T, PS, and AS. Similarly, the ink occluding body 31 is made of a transparent fiber made of acrylic resin,
The batting is formed by using PP having high transparency for the outer skin, and when it is used as the ink occluding body 31 of the present invention, the structure which has no problem with the illusion of the remaining amount of ink described above can be obtained. Although the fiber bundle has a slightly white appearance color in the state of the component, the transparency increases when the ink 2 is mounted, and when the ink remaining amount is exhausted, the ink occlusion body 3
1 is visible as an ink color while the ink 2 inside the ink storage unit 31 is present, and in a state where the ink 2 inside the ink storage unit 31 is exhausted (a state where writing is impossible because there is no ink 2), the ink storage unit 31 is not used. Although the ink 2 was thinly adhered to the inside, it was clearly visible that external light had passed through and the ink color was extremely thin, so that it was easy to see that there was no ink remaining. If the material has a light transmittance of 40% or less, the inside of the ink occluder 3 cannot be visually recognized.
Regardless of whether or not the ink 2 remained in 1, the appearance was almost the same and the visibility was poor.

Further, in the present invention, it has been found that visibility is improved by reducing the surface roughness of a member having high transparency among members incorporated therein as much as possible. Even if the material has high transparency, the surface roughness of the surface is ground glass,
Even if the ink 2 runs out, there is a problem that the inside cannot be visually recognized, and even if the transparency is 40% or more, the ink droplets tend to remain on the surface of the part tightly. In some cases, the visibility deteriorates much more than in the above case, and a visibility problem that causes an illusion that the remaining amount of ink remains is sometimes caused. Although the results were better when the surface roughness was small (fine), the experimental results showed that the arithmetic average surface roughness was very good when the surface roughness was 0.2a (μm) or less, and the surface roughness was 0.8a (μm). If it is below, the result is practically sufficient. If the internal members of the snorkel 25 and the ink occluding body 31 are not sufficiently transparent, it is naturally desirable to use a color other than the ink color from the viewpoint of remaining amount confirmation. An achromatic color that can be clearly distinguished is desirable.

As described above, in the present invention, the amount of expansion of the space itself in the case of sudden pressurization / decompression is reduced, thereby weakening the blowing force and reducing the amount flowing out to the collector 6 side. As a configuration, an ink occluding body 31 such as a batting is provided so as not to block the ventilation portion 27 of the snorkel 25. In order to exhibit the effect of reducing the volume of the ink occluding body 31, the ink mounting capacity is not reduced in the state where the ink 2 is occluded and has a length extending substantially around the center of the ink tank 3 or to the rear thereof. By occupying the rear space, the air expansion at the time of pressurizing and depressurizing is substantially reduced, and as a direct liquid type writing instrument, at least a part of the space can be visually recognized outside the ink tank 3 in the radial direction (usually, Rear tank 3
8) need to freely enter and exit the ink 3.

[0038]

The operation of the present invention will be described in an embodiment. By adopting the configuration of the present invention, not only has the effect of preventing ink from being ejected in response to a relatively slow internal pressure change due to a change in temperature of the conventional collector writing instrument, but also has the same effect as in an aircraft. When the pressure changes abruptly in consideration of the time of use, the air in the tank is evacuated to prevent the ink from flowing from the ink tank side to the collector abruptly. Also, since the air escapes, even if the ink flows, it can weaken the momentum of the ink jet, and it is possible to solve the problem that ink is accumulated in the collector due to repeated use in an environment of pressurization and decompression. As a result, it has the effect of comprehensively preventing blowout of collector writing instruments and DC accidents.

When used in combination with the ink occluding body, the writing implement according to the present invention is less likely to cause a problem relating to blowing out due to the synergistic effect of the action of releasing the expanded air to the outside of the writing implement as much as possible and the action of reducing the volume of the ink occluding body. It has a great effect. In addition, the small ink occluding body can solve the problem of ink drop when the pen tip is facing up, and at the end of the writing life, there is no direct liquid ink for about 100 m, and the batting type In addition, the ink can not be written clearly, but can be written very slightly, so that it has the effect of solving the problem of end writing that can not be suddenly applied with a direct liquid writing instrument.

By adopting the structure of the internal parts satisfying the transparency of the present invention, even though the ink is not remaining,
The part to which the ink has adhered has an effect of solving the problem of visibility that looks as if the ink remains. Since a component having a transparency of 40% or more is used, even if the ink is thinly attached to the internal component, the color development of the ink color is weakened by the transmission of external light, and it can be visually confirmed that the ink is not actually remaining. Has an action.

Further, by satisfying the surface roughness of the present invention, the surface does not become ground glass, has the function of ensuring sufficient light transmission having the above-mentioned action, and the ink has unevenness on the surface of the internal member. It has the function of preventing the remaining amount. In other words, the components inside the ink tank 3 are
Has the effect of not causing an illusion as if it were left. Due to these various functions, there is no problem at all, and the internal pressure is adjusted sharply, and writing and direct current problems do not occur in the current operating environment of the writing implement in any situation. It has the effect of making a writing instrument with good appearance and good appearance.

[0042]

The construction and operation of the writing instrument according to the present invention are as described above, and a writing instrument having a thin, good appearance and excellent writing properties can be obtained. It is possible to prevent writing abnormalities due to pressure fluctuations caused by airplanes, temperature changes, pumping phenomena due to caps, writing abnormalities due to dropping, etc., and DC phenomena from the pen tip, so that safe and stable writing performance can be secured. In particular, a writing instrument free of blowing and direct current accidents can be provided even in an environment that is repeatedly subjected to the depressurized environment of an aircraft, such as that used by a businessman who writes on a transit aircraft.

Further, by combining with an ink occluding material, not only the safety is further increased but also the problem of ink drop and the problem of end writing property can be solved at the same time. Specially designed for users, a safe collector writing instrument that is effective, has no problems caused by components to satisfy use on aircraft, is easy to manufacture, and has excellent long-term storage and ink level confirmation at the end of writing It is not necessary to notify the user with important precautions, that is, it is possible to provide an inexpensive, good-looking, and excellent writing instrument.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an entire writing instrument body according to a first embodiment of the present invention.

FIG. 2 is an enlarged rear vertical sectional view of a writing instrument according to a first embodiment of the present invention.

FIG. 3 is a top external view of the collector according to the first embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pen tip 2 Ink 3 Ink tank (shaft) 4 Joint 5 Mouth plastic 6 Collector 7 Collector core 8 Core 9 Writing part (ball in case of ballpoint pen) 10 Air hole 11 Collector ventilation hole 12 Blade 13 Reservation groove 14 Vertical groove DESCRIPTION OF SYMBOLS 15 Air groove 16 Main part retaining groove 17 Auxiliary retaining groove 18 Gas-liquid exchange part 19 Partition part 20 Wide groove 21 Narrow groove 22 Extension part side groove 23 Partition groove 24 Face milling 25 Snorkel 26 Partition part 27 Vent part 28 Front opening 29 Rear opening 30 Ink conducting part 31 Ink occluding body 32 Front absorbing part 33 Rear absorbing part 34 Ink tank inner wall 35 Outer skin 36 Connection groove 37 Front tank 38 Rear tank 39 Outgoing part 40 Outgoing groove 41 Projecting part 42 Gap part 43 Spacer part 44 Projecting part 45 Bubble passage groove 46 Holding part 47 Receiving part (ink occluding body receiving)

Claims (3)

[Claims] 1. A pen tip having a writing portion at a tip, an ink tank for storing low-viscosity ink in a direct liquid state therein,
A writing implement having an ink guiding means from the ink tank to the pen tip, and having a collector between the ink tank and the pen tip as a regulator for storing ink when adjusting the internal pressure to a plurality of grooves; Provided with an integral or separate part of a partition part that substantially divides the ink tank, a ventilation part that can ventilate the spaces in front and rear of the partition part, and an ink conduction part that has a smaller diameter than the ventilation part. A snorkel is provided, and the ink tank is formed of a transparent or translucent resin in which at least the periphery of the snorkel is visible, and the snorkel is at least partially, preferably substantially entirely, transparent or semi-transparent having a light transmittance of 40% or more. A collector-type writing instrument characterized by being formed of transparent material and having a large thickness. 2. A pen tip having a writing portion at a tip, an ink tank for storing low-viscosity ink in a direct liquid state therein,
A writing implement having an ink guiding means from the ink tank to the pen tip, and having a collector between the ink tank and the pen tip as a regulator for storing ink when adjusting the internal pressure to a plurality of grooves; Provided with an ink storage member capable of holding ink connected to a core or a pen tip extension portion that guides from the ink tank to the pen tip, wherein the ink tank is made of a transparent or translucent resin at least around the ink storage member. The ink occluding body is configured to be able to absorb ink from at least the front opening and the rear opening with a length located at least behind the center of the ink tank. A collector-type writing instrument, characterized in that substantially all of the material is a transparent or translucent material having a light transmittance of 40% or more. 3. A snorkel and an ink occluding body are built in the ink tank, and one of the snorkel and the ink occluding body is made of a material or ink having an appearance color different from an ink color having a light transmittance of 40% or less. After being colored (including an achromatic color) with a color different from the color, the surface of the snorkel and the ink occluding material having transparency has an arithmetic average roughness Ra 0.8a (μm 3. The collector-type writing instrument according to claim 1, wherein the following substantially smooth surface is provided on at least a part of a portion that is visible from the outside.