JP2005081628A - Applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an applicator which restricts and prevents deterioration of visibility and appearance and also prevents a fluid occlusion body from getting sticky. <P>SOLUTION: The applicator comprises a hollow rear shaft 1, an ink occlusion body 10 stored in the rear shaft 1 in a replaceable manner, an ink occlusion body receiver 20 to be fitted to the tip end part of the ink occluding body 10, a tip shaft 30 of a substantially cylindrical shape having visibility fitted to the opening part of the rear shaft 1, a detection tube 40 for making ink from the ink occluding body 10 flow while being inserted into the tip shaft 30, a relay core 50 for making the ink from the ink occluding body 10 flow out while being supported by the detection tube 40, and a pen core 60 located at the opposite side of the relay core 50 while being supported by the detection tube 40. The tip shaft 30 is formed of a polyethylenenaphthalate high in a wet property and transparency. Even when condensation occurs by a storage state, there is no chance of the condensation to develop into fluid drops, thereby restricting and preventing the tip shaft 30 and the detection tube 10 from deteriorating in the visibility and appearance. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an applicator such as a marker that can easily detect the end of ink.

There are various types of writing instruments, and one of them is an end detection marker that can visually grasp the end of ink. This type of end detection marker includes, for example, a rear shaft that exchangeably stores an ink occlusion body (not shown), a transparent front shaft attached to the rear shaft, a detection tube inserted into the front shaft, and a detection tube. The relay core is inserted into contact with the ink occluding body and the pen core is inserted into the detection tube.
In the end detection marker having such a configuration, the visibility of the end detection portion is an important factor that greatly affects the quality.

In addition, a writing instrument including an ink occlusion body receiver has also been proposed in order to prevent the ink on the ink occlusion body from scattering due to dropping or the like (see Patent Document 1).
JP-A-8-39985

  The conventional end detection marker is configured as described above, and due to storage conditions (for example, an environment in which high and low temperatures are repeated), there is a considerable amount of condensation on the visual recognition part, and the visibility and appearance are greatly deteriorated. There is a problem of doing. In addition, there is a great possibility that the ink occlusion body becomes sticky when the ink occlusion body is replaced due to condensation.

  The present invention has been made in view of the above, and an object of the present invention is to provide an applicator that prevents the visibility and appearance from deteriorating and prevents the fluid occlusion body from sticking.

In the present invention, in order to solve the above-mentioned problem, a fluid is supplied from the fluid-liquid occlusion body to the pen core,
A rear shaft that accommodates the fluid storage body, a fluid storage receiver that is fitted into the rear shaft and faces at least the fluid storage body, a substantially hollow transparent front shaft that covers the fluid storage receiver, A substantially transparent detector tube inserted into the tip shaft, a relay core supported by the detector tube and contacting the fluid storage body, and a gap formed between the detector tube and the relay core, A pen core exposed from the
It is characterized in that at least the inner surface of the front shaft is formed of a highly wettable material.

The contact angle between the fluid or the solvent and the inner surface of the front shaft can be 50 ° or less.
Moreover, a fluid-liquid storage body receptacle can be formed in a substantially cylindrical shape, and a dew condensation prevention hole can be provided in the surrounding wall.
Further, the fluid-liquid occlusion body receiver can be formed in a substantially cylindrical shape, and irregularities that cause capillary action can be formed on the peripheral wall.

Moreover, the uneven | corrugated shape can be made into several concave shape, a convex shape, and / or a cross-sectional substantially V shape.
Furthermore, it is also possible to form a visual recognition lens on the peripheral wall of the front shaft.

  Here, it is preferable that the fluid-liquid occlusion body in the claims becomes larger as the distribution of the capillary force toward the pen core side. The term substantially transparent includes both transparent and translucent meanings.

The detection tube is formed in a cylindrical shape, an elliptical cylindrical shape, a triangular cylindrical shape, a rectangular cylindrical shape, a polygonal cylindrical shape, a star-shaped cylindrical shape, or the like. The surface tension of the detection tube is preferably smaller than the surface tension of the fluid. The cross-sectional area of the detection tube is preferably in the range of 8 × 10 ^{−2 to} 80 mm ² .

  The relay core is preferably in contact with a length of 5% or more of the total length of the fluid storage body. The cross-sectional area of the relay core is preferably 1% to 90% of the cross-sectional area of the fluid storage body. Further, the capillary force of the relay core is preferably larger than the capillary force of the fluid storage body. The relay core is configured to have an inner and outer two-layer structure, and the capillary force of the outer layer portion is preferably larger than the capillary force of the inner layer portion.

  One or more condensation prevention holes may be used. The substantially V-shaped cross section includes at least a V-shaped cross section and a U-shaped cross section. Furthermore, the applicator can be used as a writing instrument such as a sign pen and various markers, a correction tool, a cosmetic tool, and the like.

According to the present invention, since the front shaft is formed of a material having excellent wettability and the like, it is possible to prevent condensation from forming droplets even if condensation occurs due to a temperature change or the like.
In addition, the fluid flows from the fluid reservoir to the pen core via the relay core and the detection tube, and the fluid can be applied by permeating the pen core. When the fluid liquid is reduced and finished by application of the fluid liquid, the fluid liquid does not exist in the substantially transparent detection tube, so that it is possible to visually grasp the end of the fluid liquid.

The dew condensation prevention hole guides the dew condensation water from the outside of the fluid storage container receiver to the inside of the fluid storage container receiver to suppress the occurrence of condensation.
In addition, because the concavity and convexity return the condensed water from the outside of the fluid reservoir receiver to the fluid reservoir, relay core, and pen core through the fluid reservoir receiver by the capillary force, the air replacement flow path is blocked. It is less likely that the drawn lines are thinned by condensation.

  As described above, according to the present invention, there is an effect that deterioration of visibility and appearance can be effectively suppressed or prevented. In addition, the risk of sticking of the fluid storage body can be eliminated.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. The applicator in this embodiment can be replaced with a hollow rear shaft 1 and the rear shaft 1 as shown in FIGS. The ink storage body 10 accommodated in the ink storage body 10, the substantially cylindrical ink storage body receiver 20 that prevents ink scattering of the ink storage body 10, and the substantially cylindrical shape that is attached to the opening of the rear shaft 1 and has visibility. A front shaft 30, a detection tube 40 inserted into the front shaft 30 to flow ink from the ink storage body 10, a relay core 50 inserted and supported in the detection tube 40 to flow out ink from the ink storage body 10, A pen core 60 that is inserted and supported by the detection tube 40 and exposed from the front shaft 30 is used as a batting type writing instrument such as an end detection marker.

  As shown in FIG. 1, the rear shaft 1 is formed into a long bottomed cylindrical shape using a predetermined synthetic resin made of PP or the like, for example, and functions as a main body of a writing instrument. The rear shaft 1 has a substantially front half of the inner peripheral surface formed on the enlarged inner peripheral surface 2 and a substantially rear half of the inner peripheral surface formed on the reduced inner peripheral surface 3. A tapered inclined step surface 4 is formed between the surface 2 and the reduced diameter inner peripheral surface 3. The rear shaft 1 is formed to be opaque or transparent, but either may be adopted from the viewpoint of appearance or practical use.

  As shown in FIG. 1, the ink occlusion body 10 is formed in a long and narrow cylindrical shape using a predetermined material, and is impregnated with ink for writing made of water-based ink, oil-based ink, or the like. The ink occlusion body 10 that is a batting includes, for example, natural fibers, animal hair fibers, polyacetal resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins, polyolefin resins, polyvinyl resins, PP resins, It is formed into a bundle using fibers such as polyether-based resin, polyphenylene-based resin, and felt. In addition to this, it is formed using a porous body of sponge, resin particles, and sintered body.

  In order to detect the end signature satisfactorily, the ink which is a fluid is set to a surface tension of 18 mN / m or more at 25 ° C. or less, preferably 20 to 50 mN / m or more at 25 ° C. or less. The surface tension of the ink is adjusted by adding a surfactant or the like to the ink composition as necessary.

  In order to ensure a smooth supply to the pen core 60, the viscosity coefficient of the ink is set to 500 mPa · s or less, preferably 200 mPa · s or less, more preferably 1 to 100 mPa · s or less at 25 ° C. or less. This is because when the viscosity coefficient of the ink exceeds 500 mPa · s, it is not possible to ensure a sufficient amount of ink outflow, and there is a risk of blurring due to insufficient flow. The viscosity coefficient of the ink is adjusted by adding a thickener or the like to the ink composition as necessary.

  As shown in FIGS. 1 to 3, the ink occlusion body receiver 20 is formed into a hollow convex shape using a predetermined synthetic resin made of PP or the like, for example, and suppresses scattering of ink from the ink occlusion body 10. To function.

  The ink occlusion body receiver 20 is formed with an arbitrary number of anti-condensation holes 21 for reducing the volatilization ratio from the pen core 60 on the peripheral wall, and fine irregularities 22 for generating capillary force are formed in the longitudinal direction on the inner and outer surfaces of the peripheral wall. A plurality are formed.

  The irregularities 22 are formed in, for example, a concave cross section (see FIG. 4), a convex cross section (see FIG. 5), or a substantially V cross section (see FIG. 6) arranged at a predetermined pitch in the circumferential direction of the ink occlusion body receiver 20. Is done. Such an ink occlusion body receiver 20 is inserted into the opening of the rear shaft 1 and is opposed to the enlarged inner peripheral surface 2 of the rear shaft 1 with a gap, and is in contact with the inclined step surface 4, The occlusion body 10 is fitted and brought into contact with the end portion on the front end side.

  As shown in FIGS. 1, 7, and 8, the front shaft 30 is a hollow transparent convex shape using a synthetic resin made of polyethylene naphthalate (PEN) having excellent wettability, transparency, gas barrier properties, and the like. The light transmittance is set to 30% to 100%, preferably 50% to 100%, more preferably 80% or more. The light transmittance of the ink occlusion receiver 20 is set to the opening of the rear shaft 1. It is inserted into the tip of the reduced diameter.

  The front shaft 30 has a contact angle with ink or its solvent of 50 ° or less, preferably 20 ° or less. A tip 32 of the front shaft 30 is detachably fitted with a cap 32 for protecting the pen core 60, and a ring-shaped positioning flange 33 projecting radially outwardly projects from an outer peripheral surface near the center. The positioning flange 33 is in positioning contact with the opening end surface of the rear shaft 1.

  On the inner peripheral surface of the tip end portion 31 of the front shaft 30, a substantially ring-shaped pressure contact portion that is directed radially inward is selectively projected. The thickness of the peripheral wall of the front shaft 30 is partially increased or decreased to form a plurality of lenses 34, and each lens 34 functions so as to enlarge and visually recognize the detection tube 40 using light refraction.

The lens 34 is, for example, a type in which the inner diameter of the core is chamfered (see FIG. 8), a type in which the thickness of the central portion is increased (see FIG. 9) like a magnifying glass, and a type in which the curvature is changed and enlarged (see FIG. For example).
The lens 34 may be singular, or the region other than the lens 34 on the front shaft peripheral wall may be embossed to emphasize the lens 34.

  As shown in the figure, the detection tube 40 is formed into a visible cylindrical shape using a predetermined material, and is penetratingly supported by the front end portion of the ink occlusion body receiver 20 and the front shaft 30. Examples of the material of the detection tube 40 include polyolefin resins such as polypropylene, polyethylene, cyclic polyolefin, poly (1-methyl-4-pentene), polystyrene, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, fluororesin, and silicone rubber. Etc.

  The inner peripheral surface of the detection tube 40 is selectively subjected to a coating process such as fluorine or silicone resin, and this process makes the surface tension of the detection tube 40 smaller than the surface tension of the ink. In the circumferential direction of the outer peripheral surface of the detection tube 40, a groove-shaped pressed contact portion is selectively cut out, and the pressed contact portion is fitted into and pressed against the press contact portion.

  As shown in the figure, the relay core 50 is formed in a substantially cylindrical shape using a predetermined material, and is fitted into and supported by the end portion of the ink storage body side of the detection tube 40 in the ink storage body receiver 20. The relay core 50 protrudes from the ink occluding body receiver 20 and is inserted into the tip of the ink occluding body 10 and functions to supply the ink of the ink occluding body 10 to the pen core 60 through the detection tube 40.

  The relay core 50 includes, for example, natural fibers, animal hair fibers, polyacetal resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins, polyolefin resins, polyvinyl resins, polyether resins, polyphenylene resins, It is formed into a bundle using fibers such as felt. Of course, other than this, a porous body of sponge, resin particles, and sintered body is used.

  The relay core 50 has a length of 5% or more, preferably 10% or more, more preferably 20% to 100%, and even more preferably 50% to 100% of the total length of the ink storage body 10. This is because, when the length of the relay core 50 is less than 5% of the total length of the ink occluding body 10, there is a possibility that the ink consumption rate is the same level as that of the conventional batting type writing instrument.

  As shown in FIG. 1, the pen core 60 is formed into a substantially cylindrical shape with a rounded tip using a predetermined material, and is fitted and supported via an O-ring 61 at the end of the detection tube 40 on the side opposite to the ink storage body 10. Then, the tip end portion 31 of the front shaft 30 is exposed.

  The pen core 60 includes, for example, natural fibers, animal hair fibers, polyacetal resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins, polyolefin resins, polyvinyl resins, polyether resins, polyphenylene resins, It is formed into a bundle using fibers such as felt. In addition to this, it is appropriately formed using a porous body of sponge, resin particles, and sintered body.

  The pen core 60 has a groove appropriately cut out in the circumferential direction on the peripheral surface thereof, and the maximum width portion 62 is fitted into the end of the detection tube 40. The pen core 60 is opposed to the relay core 50 with a detection space 41 as a gap, and is integrated in a line with the detection tube 40 and the relay core 50 to supply ink in the detection space 41 to the paper surface. To do.

  In the above configuration, the ink permeates the pen core 60 from the ink occlusion body 10 via the relay core 50 and the detection tube 40, and writing can be performed by penetrating the pen core 60. When the ink is reduced and finished by writing over a long period of time, since the ink does not pass through the detection space 41 of the transparent detector tube 40, the ink end sign can be detected visually and simply. Can do.

  According to the above configuration, since the front shaft 30 is formed of polyethylene naphthalate having excellent wettability and the like, even if dew condensation occurs on the front shaft 30 based on storage conditions, the dew condensation does not become droplets. Therefore, it is possible to very effectively suppress and prevent the visibility and appearance of the front shaft 30 and the detection tube 40 from being greatly deteriorated.

  Even if dew condensation occurs between the rear shaft 10 and the ink occlusion body receiver 20, the dew condensation prevention hole 21 guides the dew condensation water from the outer surface of the ink occlusion body receiver 20 to the inside of the ink occlusion body receiver 20, thereby Since the generation is suppressed, it is difficult for condensation to occur even with an alcohol-based marker, and it is possible to effectively suppress and prevent the occurrence of poor writing due to condensation.

  In addition, since the plurality of irregularities 22 return the condensed water from the outer surface of the ink occluding body receiver 20 to the ink occluding body 10 and the pen core 60 through the inside of the ink occluding body receiver 20 by capillary force, circulation for air replacement at the time of writing. The road is not blocked, and condensation does not occur and the writing line does not become thin. As a result, it is not necessary to mold the resin into a thick wall to suppress the change in the internal temperature of the cap 32, so that the cost can be reduced.

  Moreover, since the outer surface of the ink occluding body 10 does not become sticky at the time of replacement, it is possible to reduce discomfort. Further, even when the pen core 60 is dried and faded, the end sign of the ink is not erroneously detected, and this makes it possible to achieve long-term use and convenience of the writing instrument. Further, since the lens 34 of the front shaft 30 causes the detection tube 40 to be enlarged and visually recognized, a clear grasp of the detection tube 40 can be expected even when the detection tube 40 is thin. When the detection tube 40 is thick, the detection tube 40 can be made to stand out.

  In addition, since the detection tube 40, the relay core 50, and the pen core 60, which are separate parts, are assembled and integrated into an integrated structure, the detection tube 40 can be easily assembled without causing bubbles to be mixed. A significant improvement in manufacturability can be expected. Further, if the pressure contact portion and the pressure contact portion are strongly engaged, it is possible to effectively prevent the front shaft 30 and the detection tube 40 from falling off due to the frictional force and the fitting force.

  Further, the maximum width portion 62 of the pen core 60 can be fitted into the detection tube 40 to increase the dimensional stability, and the strength can be improved by sealing in a region having a high resin component and high hardness. As a result, it is possible to prevent the pen core 60 from falling sideways during writing, to ensure a stable sealing property, and to prevent the mixing of bubbles.

  Although the rear shaft 1 is merely shown in the above embodiment, if there is no particular problem, only a part of the rear shaft 1 may be formed transparently. Further, the front shaft 30, the detection tube 40, the relay core 50, and the pen core 60 may be configured in an integrated structure. Furthermore, the relay core 50 and the pen core 60 may be press-fitted into the detection tube 40, respectively. However, for example, a three-chuck chuck structure may be used.

It is the whole section explanatory view showing an embodiment of an applicator concerning the present invention. It is a side view which shows the ink occlusion body receiver in embodiment of the applicator which concerns on this invention. It is a rear view which shows the ink occlusion body receiver in embodiment of the applicator which concerns on this invention. It is sectional explanatory drawing which shows the unevenness | corrugation which consists of a concave shape in embodiment of the applicator which concerns on this invention. It is sectional explanatory drawing which shows the unevenness | corrugation which consists of a convex shape in embodiment of the applicator which concerns on this invention. It is sectional explanatory drawing which shows the unevenness | corrugation which consists of V shape in embodiment of the applicator which concerns on this invention. It is a side view which shows the front axis | shaft in embodiment of the applicator which concerns on this invention. It is the VIII-VIII sectional view taken on the line of FIG. FIG. 9 is a view corresponding to FIG. 8 illustrating a front shaft and another lens in the embodiment of the applicator according to the present invention. FIG. 9 is a view corresponding to FIG. 8 illustrating a front shaft and another lens in the embodiment of the applicator according to the present invention.

Explanation of symbols

1 Rear shaft 10 Ink occlusion body (fluid occlusion body)
20 Ink occlusion body receiver (fluid occlusion body receiver)
21 Condensation prevention hole 22 Concavity and convexity 30 Lead shaft 31 Tip portion 34 Lens 40 Detection tube 41 Detection space (gap)
50 Relay core 60 Pen core

Claims (6)

An applicator for supplying a fluid from the fluid reservoir to the pen core, the rear shaft containing the fluid reservoir, and the fluid reservoir inserted into the rear shaft and facing at least the fluid reservoir A receiver, a substantially hollow transparent front shaft that covers the fluid liquid storage body receiver, a substantially transparent detection tube inserted into the front shaft, a relay core supported by the detection tube and in contact with the fluid storage material, Including a pen core that is supported by the detector tube and forms a gap with the relay core and exposed from the front shaft,
An applicator characterized in that at least the inner surface of the front shaft is formed of a highly wettable material.   The applicator according to claim 1, wherein the contact angle between the fluid or the solvent thereof and the inner surface of the front shaft is 50 ° or less.   The applicator according to claim 1 or 2, wherein the fluid-liquid storage body receptacle is formed in a substantially cylindrical shape, and a dew condensation prevention hole is provided on a peripheral wall thereof.   The applicator according to claim 1, 2, or 3, wherein the fluid-liquid occlusion body receiver is formed in a substantially cylindrical shape, and irregularities that cause capillary action are formed on a peripheral wall thereof.   The applicator according to claim 4, wherein the uneven shape is a plurality of concave shapes, convex shapes, and / or substantially V-shaped cross sections.   The applicator according to any one of claims 1 to 5, wherein a lens for visual recognition is formed on the peripheral wall of the front shaft.

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