JP6806495B2 - Writing implements - Google Patents

Description

The present invention relates to a writing instrument that enables writing from a container containing liquid writing ink through a writing unit.

Conventionally, as shown in Patent Document 1 and Patent Document 2, a writing instrument having a writing portion provided at the tip of a holder having visibility and being able to visually recognize the writing direction through the holding body at the time of writing is disclosed. Has been done.

However, the presence of the ink passage in the holding body may hinder the visibility. Therefore, the applicant discloses a writing instrument in which the writing unit is a visual recognition unit by adjusting the refractive index (see, for example, Patent Document 3).

However, the writing instrument disclosed in Patent Document 3 has a problem that it is difficult to combine the refractive index of the ink and the writing core.

Japanese Unexamined Patent Publication No. 2012-20575 Japanese Unexamined Patent Publication No. 2014-50970 Japanese Unexamined Patent Publication No. 2011-4608

The present invention has been made in view of the above-mentioned conventional problems and the like, and it is possible to write a writing ink that is excellent in design and stable, and that the visible part is not obstructed by the writing part and the writing ink. The purpose is to provide writing instruments.

The present inventors have attempted to solve the above-mentioned conventional problems and the like in a writing instrument having a cursive containing writing ink and a writing portion attached to one end of the cursive. The writing unit has a cursive that can guide the writing ink from the barrel and holds the cursive, and the holding body is made of a hard material having visibility and holds the cursive. It has been found that the cursive is provided on the body, and when the cursive is viewed from a specific angle, the cursive can be obtained by setting the visible portion of the cursive to a specific value or less in the surface area of the holding body. , The present invention has been completed.

That is, the writing tool of the present invention is a writing tool having a barrel containing writing ink and a writing portion attached to one end of the barrel, and the writing portion guides the writing ink from the barrel. It has a cursive writing body and a holding body for holding the writing body, the holding body is made of a hard material having visibility, and the holding body is provided with the writing body on the holding body. It is characterized in that the visible portion of the cursive is 50% or less in the surface area of the holding body when viewed from a specific angle.

Further, the holder has a wall thickness of 1 mm or more in the cross section perpendicular to the axial direction, or the ratio of the outer diameter of the cursive to the outer diameter of the holder is 1: 3 or more. Is preferable.
Further, as for the holding body, it is preferable that the holding body is provided with a writing portion or an ink supply portion at the central portion and the outer peripheral portion in the radial direction.

According to the writing instrument of the present invention, the writing portion is composed of a cursive that can guide writing ink from a barrel and a holding body that holds the writing body, and the holding body is formed of a hard material having visibility. In addition, since the visible part of the cursive can be seen finely, the visibility of the holding body makes it possible to make the writing part clearer while looking at the part to be written when writing with the writing tool. It can produce excellent effects.

It is explanatory drawing of the writing instrument which concerns on 1st Embodiment of this invention, (a) is a front view, (b) is a central longitudinal sectional view in the longitudinal direction of (a), (c) is rotated by 90 ° from (a). The front view (d) is a central longitudinal sectional view of (c) in the longitudinal direction. It is a perspective view of the writing instrument of FIG. It is a component view of the writing core of the writing instrument of FIG. 1, (a) is a perspective view, (b) is a front view, and (c) is a plan view. It is explanatory drawing of each part of the instruction member (holding body) of the writing instrument of FIG. 1, (a) is a perspective view seen from the other side, (b) is a view seen from the other side, (c) is a front view, (d). ) Is a central longitudinal sectional view in the longitudinal direction of (c), (e) is a view seen from above, (f) is a central longitudinal sectional view in the longitudinal direction of (e), and (g) is a perspective view seen from the rear. , (H) is a view seen from the rear. It is explanatory drawing of the writing instrument which concerns on 2nd Embodiment of this invention, (a) is the perspective view from the other side, (b) is the front view, (c) is the vertical sectional view along the CC line of (b). Is. 5 is a component diagram of a supporting member (holding body) of a writing instrument, in which (a) is a perspective view from the front side, (b) is a front view, (c) is a front view, and (d) is (b). ) Is a vertical cross-sectional view along the DD line, (e) is a front view rotated by 90 ° of (c), (f) is a vertical cross-sectional view along the FF line of (b), and (g) is. A perspective view from the rear, (h) is a view seen from the rear. It is explanatory drawing of the writing instrument which concerns on 3rd Embodiment of this invention, (a) is a view seen from the other side, (b) is a perspective view from the other side, (c) is a front view, (d) is (a). It is a vertical sectional view along the CC line of. 7 is a component diagram of the supporting member (holding body) of the writing instrument, (a) is a perspective view from the front side, (b) is a view from the front side, (c) is a front view, and (d) is (b). ) Is a vertical cross-sectional view along the DD line, (e) is a front view rotated by 90 ° of (c), (f) is a vertical cross-sectional view along the FF line of (b), and (g) is. A perspective view from the rear, (h) is a view seen from the rear. It is explanatory drawing of the writing instrument which concerns on 4th Embodiment of this invention, (a) is a view seen from the other side, (b) is a perspective view from the other side, (c) is a front view, (d) is (a). It is a vertical sectional view along the DD line of. 9 is a component diagram of a supporting member (holding body) of a writing instrument, (a) is a perspective view from the front side, (b) is a view from the front side, (c) is a plan view, and (d) is a front view. , (E) is a vertical cross-sectional view taken along the line FF of (b), (f) is a perspective view from the rear, and (g) is a view seen from the rear. The light path of the support member (holding body) is shown, (a) is a cross-sectional view of the support member according to the fourth embodiment, and (b) is the support member according to the fourth embodiment with streaks (recesses) inside. Cross-sectional view of the non-existent one, (c) is an explanatory view of the optical path of the support member of (b), (d) is a cross-sectional view of the support member having streaks according to the fourth embodiment, and (e) is (d). ) Is a perspective view of the support member. It is explanatory drawing of the writing instrument which concerns on 5th Embodiment of this invention, (a) is a view seen from the other side, (b) is a perspective view from the other side, (c) is a front view, (d) is (a). It is a vertical sectional view along the DD line of. It is a component drawing of the support member (holding body) of the writing instrument of FIG. 12, (a) is a perspective view from the front side, (b) is a view seen from the front side, and (c) is the DD line of (e). A cross-sectional view along the line, (d) is a plan view, (e) is a front view, (f) is a vertical cross-sectional view along the FF line of (b), (g) is a perspective view from the rear, (h). Is a rear view, (i) is a cross-sectional view taken along line I-I of (e), and (j) is a cross-sectional view taken along line JJ of (e). It is explanatory drawing of the modification of the writing instrument of FIG. 13, and is explanatory drawing of the optical path in the support member which was cross-viewed at the same place as the line CC of FIG. 13C. It is explanatory drawing of the writing instrument which concerns on 6th Embodiment of this invention, (a) is a perspective view from the front, (b) is a side view, (c) is a vertical sectional view along the CC line of (b). Is. FIG. 15 is a component view of the shaft cylinder of the writing instrument, (a) is a front view, (b) is a perspective view, (c) is a side view, and (d) is a vertical cross section along the DD line of (a). It is a figure. 16 is a component diagram of a supporting member (holding body) of a writing instrument, (a) is a perspective view from the front side, (b) is a view from the front side, (c) is a side view, and (d) is (b). ) Is a vertical sectional view along the DD line, (e) is a perspective view from the rear, and (f) is a vertical sectional view along the CC line of (c). It is explanatory drawing of the transparency of the support member of the writing instrument of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In any of the embodiments, a cap (not shown) for protecting the writing portion is detachably attached to the tip of the shaft cylinder.

[Writing Instruments of the First Embodiment]
1 to 4 are writing instruments according to the first embodiment of the present invention, and FIGS. 1 (a) to 1 (d) are explanatory views of the writing instrument according to the first embodiment of the present invention.
As shown in FIGS. 1 (b) and 1 (d), in the writing instrument A of the first embodiment, an ink occlusion body 12 is housed in a shaft cylinder 10 which is a writing instrument main body, and ink for a writing instrument is stored in the ink occlusion body 12. Is the type that is occluded. The shaft cylinder 10 is made of, for example, a thermoplastic resin, a thermosetting resin, or the like, and has a tubular shape with a closed rear end. Inside the rear portion of the barrel 10, ribs 10a for supporting the ink storage body 12 are formed so as to project inward.
The writing instrument A has a configuration in which an ink storage body 12 is connected to the rear end of the writing unit 14 to supply the writing instrument ink of the ink storage body 12 to the writing unit 14.
The reference numeral LD in FIG. 1A indicates the longitudinal direction (axial direction) of the barrel 10.

FIG. 2 is a perspective view of the writing instrument A, FIGS. 3 (a)-(c) are the writing body 16, and FIGS. 4 (a)-(h) are component views of the holding body 18 to which the writing body 16 is mounted.
As shown in FIG. 2, the writing unit 14 of the first embodiment has a structure in which the cursive 16 is arranged on the outer periphery of the holding body 18 and the holding body 18 holds the cursive 16. The writing portion 14 in a state where the writing body 16 is held by the holding body 18 is attached to the tip end portion of the shaft cylinder 10 by a tubular tip shaft 20.

In the mounted state, the writing portion 14 is arranged in a state in which about half of the writing body 16 and the holding body 18 are projected and exposed from the tip end portion of the tip shaft 20. The tip shaft 20 has a tubular shape, and the tip portion of the ink storage body 12 is internally provided therein, and is attached to the tip portion of the shaft cylinder 10. The tip opening of the front shaft 20 and the writing portion 14 are closed by a flange portion 18b described later of the holding body 18, the main body portion 18a fits into the tip opening of the front shaft 20, and the writing portion 14 comes off. It has been stopped. The portion where the cursive body 16 is installed (visible portion 18c) is transparent or translucent around the main body portion 18a of the holding body 18, so that the writing target portion can be visually recognized.

The ink storage body 12 is impregnated with ink for writing tools such as water-based ink and oil-based ink. For example, natural fiber, animal hair fiber, polyacetal resin, acrylic resin, polyester resin, polyamide resin, and polyurethane resin are used. A fiber bundle composed of one or a combination of two or more kinds of resins, polyolefin resins, polyvinyl resins, polycarbonate resins, polyether resins, polyphenylene resins, etc., processed fiber bundles such as felt, and sponges. , Resin particles, and porous materials such as sintered bodies. The ink storage body 12 is housed in the main body of the barrel 10. Although the rear end side of the barrel 10 is closed, it may be sealed with a breech plug formed of the same material as the barrel 10 or a different synthetic resin material.
The composition of the writing instrument ink to be used is not particularly limited, and a suitable compounding formulation can be used depending on the use of the writing instrument and the like. Preferably, it is desirable to use an ink composition for writing instruments, which will be described later.

Further, as shown in FIGS. 1B and 2, the cursive 16 has a substantially U-shape so as to surround the substantially rectangular holding body 18.
In the first embodiment, as shown in FIG. 3A, the cursive 16 has ink guiding portions 16a and 16a, bending portions 16b and 16b, and a writing surface portion 16c. The cursive 16 has a shape in which a strip-shaped body having a substantially circular cross section is bent, and is formed of a sintered body having ink inducibility.
The cursive 16 is composed of bent portions 16b and 16b in which the tip sides of the ink guiding portions 16a and 16a are bent by approximately 45 ° and a writing surface portion 16c in which the bent portions 16b and 16b are combined and the tip is cut. ing.

The holding body 18 according to the first embodiment will be described in detail with reference to the parts drawings of FIGS. 4A to 4H.
As shown in FIGS. 1 (b) and 1 (d), the holding body 18 fixes the cursive 16 to the periphery and is fixed to the tip opening of the front shaft 20 of the shaft cylinder 10.
As shown in FIGS. 4A to 4H, the holding body 18 includes a substantially bulging main body portion 18a, a flange portion 18b having an annular diameter expanded on the front side of the main body portion 18a, and a flange portion. Planar visible portions 18c, 18c and the visible portions 18c, 18c having a structure extending from both sides of 18b to the front side in a substantially plate shape, and inclined cut surfaces 18d, 18d on the upper and lower sides of the visible portions 18c, 18c and inside the front side. Have. Further, the holding body 18 is provided with a rear holding portion 18e connected to the main body portion 18a on the rear side of the main body portion 18a. Further, a holding groove 18f for fitting and holding the U-shaped cursive body 16 is formed on the entire outer peripheral surface of the holding body 18 composed of these parts in the longitudinal direction.

Further, a concave or convex fitting portion 18h for fitting on the inner circumference of the front shaft 20 is formed on the outer peripheral surface in the width direction of the main body portion 18a, and a flange portion 18b is formed on the outer peripheral surface in the longitudinal direction. Air flow grooves 18i and 18j for air replacement having a concave cross section are formed on the outer peripheral surface from the rear holding portion 18e. The structure is such that air flows with the outside air in the barrel 10 via the air flow grooves 18i and 18j. Due to the structure, it is possible to replace the ink for writing instruments stored in the ink storage body 12 with air when writing by the writing unit 14.
Further, in the first embodiment, the large-diameter portion 15a and the small-diameter portion 15b made of the same material as the ink storage body 12 are integrated at the central portion of the main body portion 18a of the holding body 18 in the longitudinal (radial direction) direction. The ink feeder accommodating hole 18k in which the large-diameter portion and the small-diameter portion accommodating the ink feeder 15 are communicated with each other penetrates.

The holding body 18 according to the first embodiment is formed from a hard material, and is preferably made of a hard material whose writing direction can be visually recognized, for example, a metal, glass, a resin having no rubber elasticity, or the like. A visible portion 18c, which is a wide smooth surface, is formed in the front and a main body portion 18a is formed in the rear. Examples of the resin having no visible rubber elasticity include styrene-isoprene resin, ionomer resin, SBR-PP blend resin, acrylic resin, nylon resin, polymethylpentene, PC (polycarbonate), and transparent ABS resin. Can be mentioned. The hard material may have a visible light transmittance that allows the writing direction to be visually recognized, and is preferably composed of a material having a transmittance of 50% or more.
If a material having a visible light transmittance of less than 50% is used, the target portion in the writing direction may not be effectively visible, which is not preferable. In order to exhibit a further good visual function, a material that transmits 50% or more is preferable, and if the visible light transmittance is 80% or more, the visual light becomes even better.

The writing body 16 is a polymer foam such as a sponge, a porous rubber body used for a penetrating mark, a non-woven cloth, a felt, a fiber bundle hardened with a resin, or a metal, ceramic, or polymer fired. It is composed of a porous member such as a body, and these porous members (the same applies hereinafter) are covered on the outer periphery of the holder 18 by fitting, bonding with an adhesive, welding, or the like. ing. In addition, a fitting groove or the like may be provided on the outer peripheral surface of the holding body 18 in order to further secure the coating of the writing body 16.

In the writing tool A of the first embodiment, the ink supply mechanism from the ink storage body 12 to the writing body 16 is provided on the tip side of the ink storage body 12 and behind the ink guiding portions 16a and 16a of the writing body 16 and the ink supply body 15. A portion is fitted or the like, and the ink for writing tools impregnated in the ink storage body 12 is supplied to the writing surface portion 16c by capillary force via the ink guiding portions 16a and 16a and the ink supply body 15 through two routes. It has a structure that By appropriately setting the capillary force of the ink storage body 12, the writing body 16, and the ink supply body 15, the amount of ink supplied from the ink storage body 12 to the writing surface portion 16c of the writing body 16 by two routes is preferably set. Will be possible.
Further, the writing surface portion 16c on which the drawn lines are to be written can be set to a suitable drawn line width by setting the width in the width direction to an appropriate length, and the drawn line width is preferably 1 mm or more, more preferably more preferably. It is preferable that the drawing line width is 3 mm or more.

In the first embodiment, the visible portion of the cursive 16 is 50% or less of the surface area of the holding body 18 when viewed from a specific angle. That is, by making the visible part of the cursive 16 at least 50% or less in the surface area of the holding body 18 and minimizing the visible part of the cursive 16, writing with the writing instrument from the visibility of the holding body 18. At the time of writing, it is possible to obtain an excellent effect that the writing portion can be made clearer while looking at the writing target portion.
Further, in the holding body 18, the wall thickness in the cross section perpendicular to the axial direction, the thickest part is 1 mm or more, or the ratio of the outer diameter of the writing body 16 to the outer diameter of the holding body 18 is 1: 3 or more. By doing so, the writing portion can be made clearer while looking at the writing target portion.
Further, in the first embodiment, since the holding body 18 is provided with the writing portion and the ink supply portion at the central portion and the outer peripheral portion in the radial direction, the writing surface portion 16c of the ink storage body 12 to the writing body 16 is provided. Since the ink is supplied to the ink from two directions, the amount of ink supplied is suitable without causing the ink supply to run out.

[Writing Instruments of the Second Embodiment]
Next, the writing instrument according to the second embodiment of the present invention will be described.
5 (a)-(c) show the writing instrument according to the second embodiment of the present invention, (a) is a perspective view, (b) is a front view, and (c) is a cross-sectional view. Further, FIGS. 5 (a) to 5 (c) are parts drawings showing a support member (corresponding to a "holding body") 18B of the writing instrument.

As shown in FIG. 5C, the rear end of the barrel 10 constituting the outer portion of the writing instrument is closed, and the writing ink occlusion body 12 in which the fluid is immersed is placed in the internal space of the barrel 10. It is contained. A tip shaft 20 is attached to the tip of the shaft cylinder 10, and the tip shaft 20 is a tubular body having a stepped and tapered space inside. A brush-shaped writing portion 14B protrudes from the tip of the holding member 18B in the tip portion of the front shaft 20. Then, the rear end of the writing portion 14B is inserted into and connected to the writing ink storage body 12, and the writing portion 14B penetrates the axial center of the support member 18B.
As the writing part 14B, in the case of a brush, a material in which polybutylene terephthalate fibers are bundled and gathered so as to sharpen the tip can be used, and in the case of a pen core, nylon, polyester, or acrylic is used as the material. Can be used.
Further, as shown in FIG. 5, a support member 18B is fitted in the shaft cylinder 10 on the tip end side of the space inner wall for filling the writing ink storage body 12.

6 (a)-(h) are explanatory views of the support member 18B.
The support member 18B is made of a transparent body or a translucent body. The support member 18B of the present embodiment is made of a material having visibility, for example, styrene-isoprene resin, ionomer resin, SBR-PP blend resin, acrylic resin, nylon resin, polymethylpentene, PC (polycarbonate), transparent ABS resin. It suffices as long as it has a visible light transmittance that allows the writing direction to be visually recognized, and is preferably composed of a material having a writing direction of 50% or more, as in the first embodiment. ..

As shown in FIG. 6 (f), grooves 32 are formed on the left and right sides of the rear portion of the support member 18B, respectively. By press-fitting the latter half of the support member 18B into the tip of the front shaft 20, the groove 32 forms an air replacement hole with the inner wall of the tip of the front shaft 20 (FIG. 7 (c)). reference). Therefore, the air replacement holes are opened on the left and right sides of the writing instrument, respectively.

Further, the support member 18B has a tapered outer peripheral surface and irregularities in the circumferential direction, and the irregularities are ribbed and formed along the front-rear direction (longitudinal LD) (see FIG. 5). It has a star-shaped or flower-shaped shape. Of course, this is just an example and can be in various shapes. Since the support member 18B is transparent, the color of the writing portion 14B can be easily visually recognized, and since the outer peripheral surface of the support member 18B is uneven, the writing portion 14B looks large due to the lens effect, and matching with the support member 18B can be performed. The appearance design is improved by making efforts.

The writing instrument according to the second embodiment functions as follows.
That is, the fluid immersed in the writing ink storage body 12 (FIG. 5 (c)) is guided toward the tip by the capillary force of the writing portion 14B, reaches the tip of the writing portion 14B, and is immersed therein. You will be able to write to the desired location. Further, the air flowing in from the air replacement hole of the groove 32 reaches the internal space of the barrel 10 in which the writing ink occlusion body 12 exists. As a result, the air exchange of the fluid can be performed without any trouble.

Here, when an impact in the tip direction is suddenly applied to the writing instrument, most of the fluid is blocked by the inner stage portion of the barrel 10, but a part of the fluid passes through the air replacement hole (groove 32). Become. However, since the air replacement hole has a 90 ° bent portion (32a: see FIG. 6 (f)) on the tip side and needs to wrap around 90 ° to both the left and right sides, it does not leak directly to the outside world. Then, the fluid temporarily held on the tip side in the air replacement hole is pushed back toward the writing ink storage body 12 by the outside air flowing from the air replacement hole during that time.

[Explanation of writing ink composition]
Next, the writing ink composition used for the writing instrument will be described in the first embodiment, the second embodiment, and the third and subsequent embodiments described later.
The ink composition for a writing instrument that can be used is not particularly limited, but the points that the ink supply mechanism is good, the drying property of the drawing line (pen tip) is suppressed, and the temperature of the ink is low. From the viewpoint of excellent stability and exhibiting a function that does not cause bleeding or strike-through in drawn lines, preferably, a colorant, trimethylglycine, pentaerythritol, a water-soluble organic solvent of 10% by mass or less, and water are preferable. It is desirable to use an ink composition for writing instruments containing at least and.

Examples of the colorant that can be used include dyes that dissolve or disperse in water, conventionally known inorganic and organic pigments such as titanium oxide, resin particle pigments containing pigments, pseudo pigments obtained by coloring resin emulsions with dyes, and fluorescence. Pigments, white plastic pigments, pigments using silica or mica as a base material and having a multi-layer coating of iron oxide, titanium oxide or the like on the surface layer can be used as long as the effects of the present invention are not impaired.
Examples of dyes include acid dyes such as eosin, phoxin, water yellow # 6-C, acid red, water blue # 105, brilliant blue FCF, and nigrosin NB; direct black 154, direct sky blue 5B, violet B00B, and the like. Dyes: Basic dyes such as rhodamine and methyl violet, fluorescent dyes and the like can be mentioned.

Examples of the inorganic pigments include azo lakes, insoluble azo pigments, chelate azo pigments, phthalocyanine pigments, perylene and perinone pigments, and nitroso pigments. More specifically, carbon black, titanium black, zinc chromate, bengara, aluminum, chromium oxide, iron black, cobalt blue, iron oxide yellow, viridian, zinc sulfide, lithopone, cadmium yellow, vermilion, cadmium red, chrome yellow, Inorganic pigments such as molybdate orange, zinc chromate, strontium chromate, white carbon, clay, talc, ultramarine, precipitated barium sulfate, barite powder, calcium carbonate, white lead, navy blue, navy blue, manganese violet, aluminum powder, brass powder, etc. , C.I. I. Pigment Blue 17, C.I. I. Pigment Blue 15, C.I. I. Pigment Blue 17, C.I. I. Pigment Blue 27, C.I. I. Pigment Red 5, C.I. I. Pigment Red 22, C.I. I. Pigment Red 38, C.I. I. Pigment Red 48, C.I. I. Pigment Red 49, C.I. I. Pigment Red 53, C.I. I. Pigment Red 57, C.I. I. Pigment Red 81, C.I. I. Pigment Red 104, C.I. I. Pigment Red 146, C.I. I. Pigment Red 245, C.I. I. Pigment Yellow 1, C.I. I. Pigment Yellow 3, C.I. I. Pigment Yellow 12, C.I. I. Pigment Yellow 13, C.I. I. Pigment Yellow 14, C.I. I. Pigment Yellow 17, C.I. I. Pigment Yellow 34, C.I. I. Pigment Yellow 55, C.I. I. Pigment Yellow 74, C.I. I. Pigment Yellow 95, C.I. I. Pigment Yellow 166, C.I. I. Pigment Yellow 167, C.I. I. Pigment Orange 5, C.I. I. Pigment Orange 13, C.I. I. Pigment Orange 16, C.I. I. Pigment Violet 1, C.I. I. Pigment Violet 3, C.I. I. Pigment Violet 19, C.I. I. Pigment Violet 23, C.I. I. Pigment Violet 50, C.I. I. Pigment Green 7 and the like.
As the fluorescent pigment, conventionally known ones can be appropriately used, and examples thereof include inorganic fluorescent pigments such as zinc sulfide, zinc silicate, cadmium sulfide, strontium sulfide, and calcium tungstate, and organic fluorescent pigments dyed with polymer compounds. ..
Specific examples of organic fluorescent pigments include the NKW series (manufactured by Nippon Fluorescent Chemicals), the Shinroihi color base SW series, the SF series (manufactured by Shinroihi), and the Victoria series (manufactured by Mikuni Color) such as Victoria Yellow G-20. And so on.

These colorants can be used alone or in admixture of two or more.
The content of these colorants can be appropriately adjusted from 0.1 to 60% by mass (hereinafter, "mass%" is simply referred to as "%") with respect to the total amount of the ink composition.

The trimethylglycine used [also known as glycine betaine, (CH ₃ ) ₂ N ⁺ (CH ₃ ) CH ₂ COO ⁻ ] is used to act as a moisturizer, etc., and is blended in the water-based ink composition for writing instruments. However, it does not cause deterioration of ink performance, and exhibits the drying resistance of the pen tip, the drying property of drawn lines, and the low temperature stability of the ink.

The content of this trimethylglycine is preferably 0.5 to 50%, preferably 1 to 15%, and more preferably 2 to 10% with respect to the total amount of the ink composition.
If this content is less than 0.5%, the effect of suppressing the drying of the pen tip is not sufficient, while if it exceeds 50%, the effect does not change so much, but rather the writing performance and storage stability due to the increase in viscosity. It will bring about a decline.

The pentaerythritol [C (CH ₂ OH) ₄ ] used is used to act as a moisturizer, etc., and when used in combination with the above trimethylglycine, it acts more synergistically than when used alone, and the pen tip. While suppressing the drying of the drawn lines, it has excellent dryness of drawn lines and low temperature stability of ink, and exhibits excellent performance without bleeding or strike-through of drawn lines.

The content of this pentaerythritol is preferably 0.5 to 8%, preferably 2 to 5%, based on the total amount of the ink composition.
If the content of this content is less than 0.5%, the effect of suppressing the drying of the pen tip is not sufficient, and the synergistic action with trimethylglycine cannot be exhibited, while it exceeds 8%. The effect of the synergistic action with trimethylglycine does not change so much, resulting in precipitation at low temperature and deterioration of storage stability.

Examples of the water-soluble organic solvent to be used include alcohols such as ethanol, isopropyl alcohol, n-butyl alcohol, ethylene glycol and diethylene glycol, amides such as formamide and its derivatives, and sulfoxides such as dimethyl sulfoxide, and ethylene glycol monomethyl ether. , Ethylene glycol monobutyl ether, ethylene glycol dibutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol diethyl ether, diethylene glycol dibutyl ether, propylene glycol methyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, propylene Glycolbutyl ether, dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether, propylene glycol phenyl ether, ethylene glycol monoethyl ether, ethylene glycol monohexyl ether, ethylene glycol monophenyl ether, ethylene glycol mono-2-ethylbutyl ether, propylene Examples thereof include ethers such as glycol ethyl ether and propylene glycol tertiary butyl ether, and these can be used alone or in admixture of two or more.
The content of these water-soluble organic solvents is preferably 10% or less, preferably 7% or less, more preferably 5% or less, based on the total amount of the ink composition.
By setting the content of these water-soluble organic solvents to 10% or less, the function of excellent drawing dryness can be exhibited.

The ink composition for a writing tool used for the writing tool of the present invention is prepared with water (purified water, distilled water, ion-exchanged water, pure water, etc.) as the balance (solvent) in addition to the above components, and other than the above components. For example, an arbitrary component such as a surfactant, a preservative or an antibacterial agent, a pH adjuster, a water-soluble resin, or a resin emulsion can be appropriately contained within a range that does not impair the effects of the present invention.

Examples of the surfactant that can be used include sorbitan fatty acid ester, glycerin fatty acid ester, decaglycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, and polyoxyethylene glycerin fatty acid ester. , Polyoxyglyceride fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene castor oil, polyoxyethylene lanolin, lanolin, alcohol, beeswax derivative, polyoxyethylene alkyl Nonionic surfactants such as amine / fatty acid amide;, alkyl sulfate, polyoxyethylene alkyl ether sulfate, N-acyl amino acid salt, N-acylmethyl taurine salt, polyoxyethylene alkyl ether acetate, α-olefin Anionic surfactants such as sulfonates, alkyl phosphates, polyoxyethylene alkyl ether phosphates; perfluoroalkylethylene oxide adducts, perfluoroalkyltrimethylammonium salts, perfluoroalkylcarboxylates, fluorine Alkyl ethoxylates, perfluoroalkyl sulfonates, perfluoroalkyl group hydrophilic group-containing oligomers, perfluoroalkyl group hydrophilic group-containing urethanes, perfluoroalkyl phosphates, perfluoroalkyl betaines, perfluoroalkylamine oxides, per Examples thereof include fluorine-based surfactants such as fluoroalkylammonium salts, perfluoroalkyl alkoxylates, and perfluoroalkyl polyoxyethylene ethanol. These surfactants can be used alone or in admixture of two or more.
Examples of the preservative or antibacterial agent include phenol, sodium omadin, sodium benzoate, and benzimidazole compounds.
Examples of the pH adjuster include alkali metal hydroxides such as sodium hydroxide, potassium hydroxide and lithium hydroxide, amine compounds such as triethanolamine, diethanolamine, monoethanolamine, dimethylethanolamine, morpholine and triethylamine, and ammonia and the like. Can be mentioned.
Examples of the water-soluble resin include polyacrylic acid, water-soluble styrene-acrylic resin, water-soluble styrene / maleic acid resin, water-soluble maleic acid resin, water-soluble styrene resin, polyvinylpyrrolidone, polyvinyl alcohol, and water-soluble ester-. Acrylic resin, ethylene-maleic acid copolymer, polyethylene oxide, water-soluble urethane resin and the like can be mentioned.
Examples of the resin emulsion include an acrylic emulsion, a vinyl acetate emulsion, a urethane emulsion, a styrene-butadiene emulsion, and a styrene acrylonitrile emulsion.
These water-soluble resins and resin emulsions can be used alone or in admixture of two or more.

Conventionally known methods can be adopted for producing this ink composition for writing instruments, for example, a colorant, trimethylglycine, pentaerythritol, and 10% by mass or less of a water-soluble organic solvent. It is obtained by blending a predetermined amount of each component in water containing at least water and stirring and mixing with a stirrer such as a homomixer or a disper. Further, if necessary, coarse particles in the ink composition may be removed by filtration or centrifugation, or the ink may be produced while defoaming, heating, and cooling.

The writing instrument ink composition used for the writing instrument of the present invention configured in this way is excellent in the drying property of the drawn line and the low temperature stability of the ink while suppressing the drying of the pen tip, and the drawing line is bleeding or strike-through. It can be inferred as follows whether or not the function is not exhibited.
That is, in the writing instrument ink composition used for the writing instrument of the present invention, by containing at least a colorant, trimethylglycine, pentaerythritol, 10% by mass or less of a water-soluble organic solvent, and water, both are trimethyl. Glycin and pentaerythritol are components that suppress the drying resistance of the pen tip, and they act synergistically when used together in the water-based ink composition for writing instruments, rather than using each of them alone. Is clear. The reason is not always clear, but it is said that the synergistic effect suppresses the drying of the pen tip, while excellent in the drying property of the drawn line and the low temperature stability of the ink, and it demonstrates excellent performance without bleeding or strike-through. Guessed.
The ink composition for writing instruments used in the present invention has an extremely excellent lasting effect for exerting the above effect, and the onset period and duration of the effect are long, and trimethylglycine and pentaerythritol are water-soluble. It also has excellent stability over time.
Therefore, by using the writing ink composition having the above composition for the writing instrument of the present invention, when writing with the writing instrument from the visibility of the holder, the writing portion can be made clearer while looking at the writing target portion. A writing instrument that has the excellent effect of being able to do, while suppressing the drying of the writing part (pen tip), while also having excellent drying of the drawn lines and low temperature stability of the ink, and can exhibit the function of drawing lines without bleeding or strike-through. Will be obtained.

[Writing Instruments of the Third Embodiment]
Next, it is explanatory drawing of the writing instrument which concerns on 3rd Embodiment of this invention.
7 (a)-(d) show the writing instrument according to the third embodiment of the present invention, (a) is a view from the front, (b) is a perspective view, (c) is a front view, and (d). Is a vertical cross-sectional view. 8 (a)-(h) is a component diagram showing a support member (corresponding to a "holding body") 18C of the writing instrument. The shaft cylinder 10, the writing ink occlusion body 12, and the toe shaft 20 have the same reference numerals as those in the second embodiment.

In this writing instrument, as shown in FIGS. 7 (a) to 7 (d), a brush-shaped writing portion 14C protrudes from the tip of the holding member 18C in the tip of the tip shaft 20. Then, the rear end of the writing portion 14C is inserted into and connected to the writing ink storage body 12, and the writing portion 14C penetrates the axial center of the support member 18C.

As the writing unit 14C, as in the second embodiment, in the case of a brush, a material in which polybutylene terephthalate fibers are bundled and gathered so as to sharpen the tip can be used, and in the case of a pen core, the material is used. Nylon, polyester and acrylic can be used as.

As shown in FIGS. 8A to 8H, the holding member 18C is made of transparent resin and has an outer surface shape in which a large number of triangular surfaces are combined. As shown in FIG. 8A, it has a symmetrical elliptical shape when viewed from the front. Further, grooves 32 are formed on the left and right sides of the rear portion of the holding member 18C, respectively. By press-fitting the latter half of the support member 18C into the tip of the front shaft 20, the groove 32 forms an air replacement hole with the inner wall of the tip of the front shaft 20 (FIG. 7 (d)). reference)

The resin of the material of the holding member 18C may be the same material as that of the first embodiment, for example, styrene-isoprene resin, ionomer resin, SBR-PP blend resin, acrylic resin, nylon resin, polymethylpentene. , PC (polycarbonate), and a transparent ABS resin, and preferably made of a material having a visible light transmittance of 50% or more.
Further, in order to enhance the impression of surface reflection in the support member 18C, it is preferable that the surface that shines intermittently is switched when the angle changes.

The support member 18C can give an impression of effectively shining when many surfaces shine one after another with a small change in angle, such as a diamond cut having a large number of triangular surfaces.
Further, in order to enhance the impression of the surface reflection of the support member 18C, it is preferable that the edges (ridge lines) are firmly projected. For example, it is preferable that the radius of the edge is 0.5 mm or less.

Further, the support member 18C can emphasize both surface reflection and internal total reflection by making the transparent part (transparent resin part) thicker and making the pen core thinner.
Further, as for the support member 18C, the material having a high Abbe number (small dispersion) becomes colder light and has a high-class shine like diamond. In this case, the high refractive index material is more likely to generate both surface reflection and internal total reflection.

[Writing Instruments of the Fourth Embodiment]
Next, it is explanatory drawing of the writing instrument which concerns on 4th Embodiment of this invention.
9 (a)-(d) show the writing instrument according to the fourth embodiment of the present invention, (a) is a view from the front, (b) is a perspective view, (c) is a front view, and (d). Is shown in a vertical sectional view. Further, FIGS. 10 (a)-(g) are component drawings showing a support member (corresponding to a "holding body") 18D of the writing instrument. 11 (a)-(e) are explanatory views of the refracted state of the light beam of the support member 18D.
In FIGS. 9 to 10, the shaft cylinder 10, the writing ink occlusion body 12, and the leading shaft 20 have the same reference numerals as those in the third embodiment.

As shown in FIG. 10B, the support member 18D according to the fourth embodiment has a substantially pentagonal shape when viewed from the front side, and has a vertically asymmetrical shape.
A point that can contribute to the refraction of light when the support member 18D has a substantially pentagonal cross-sectional shape will be described with reference to FIG.

11 (a)-(e) show the support member 18C according to the third embodiment, and the cross section thereof is symmetrical in the vertical and horizontal directions. The support member 18C has a substantially elliptical shape forming an outer edge in which straight lines are combined when viewed in cross section, and forms parallel surfaces such as an upper surface and a lower surface. As shown in FIG. 11A, the parallel light L1 incident from one upper surface is refracted from the surface and enters the inside, reaches the other lower surface in parallel inside, and is refracted from the other surface and emitted ( The traveling path of light L1 is shown by a broken line). Even if the light L1 is incident, it passes through the support member 18C, so that it is difficult to produce a glittering shine.

On the other hand, in the support member 18D according to the fourth embodiment, as shown in FIGS. 11B, 11C, and 11D, the cross section thereof is a pentagon asymmetrical in the vertical direction, and the planes are parallel. Is lost. As shown in FIG. 11 (c), the support member 18D having a pentagonal cross section has surfaces 18D1 to 18D5. The parallel light L2 incident from one upper surface 18D1 is refracted from the surface 18D1 to enter the inside, further reflected and refracted on the lower surfaces 18D3 and 18D4, scattered upward, and reflected and refracted on various other surfaces 18D1 to 18D5 and emitted. (The traveling path of the light L2 is shown by a broken line).

Therefore, the frequency of total internal reflection can be increased by making the outer shape of the support member 18D a pentagon or the like and eliminating parallel surfaces (parallel surfaces). Therefore, the light L2 incident on the support member 18D is reflected on each surface and emitted, resulting in a glittering shine. When using a writing instrument, the reflected light changes and shines as the incident angle of the light from the light source changes.

Further, as shown in FIG. 11B, the support member 18D has a cylindrical passage through which the writing portion 14D passes, but the outer shape is pentagonal or the like, and parallel surfaces (parallel surfaces) can be eliminated. Then, in addition to eliminating the parallel surfaces, as shown in FIGS. 11D and 11D, the passage 18Db through which the writing portion 14D is inserted in the support member 18D has a concave streak in the core such as a cross core. (Concave) 18Da can be formed, and the frequency of internal total reflection can be further increased by the concave streaks 18Da to further increase the brilliance.

Further, as shown in FIGS. 9 to 11, the support member 18D can emphasize both surface reflection and internal total reflection by making the transparent part thicker and the pen core thinner.
Further, in the support member 18D, a material having a high Abbe number (small dispersion) becomes colder light and has a high-class shine like diamond. In this case, the high refractive index material is more likely to generate both surface reflection and internal total reflection.

[Writing Instruments of the Fifth Embodiment]
Next, it is explanatory drawing of the writing instrument which concerns on 5th Embodiment of this invention.
12 (a)-(d) show a writing instrument according to a fifth embodiment of the present invention, (a) is a view seen from the front, (b) is a perspective view, (c) is a front view, and (d). ) Is shown in the vertical sectional view. 13 (a)-(j) are parts drawings showing a support member (corresponding to a "holding body") 18E of the writing instrument. FIG. 14 is an explanatory view of a refracted state of light rays of the support member 18D.
In addition, in FIGS. 12 to 14, the shaft cylinder 10, the writing ink occlusion body 12, and the tip shaft 20 have the same reference numerals as those in the third and fourth embodiments.

As shown in FIGS. 12 and 13, the support member 18E according to the fifth embodiment has a drum-shaped shape in which recesses are formed on both side surfaces when viewed from the front side, and the writing portion 14E in the support member 18E. It makes the pen core invisible from a predetermined angle (stealth tip plastic).

As shown in FIG. 13, the support member 18E totally reflects light inside the support member 18E by making the core shape (that is, the shape of the internal passage) of the internal passage 18Ea through which the writing portion 14E passes into a square cross section. The pen core of the writing unit 14E is made invisible.

Further, the support member 18E has a concave side surface 18Eb that is recessed in an arc shape on the outer side, so that light entering the support member 18E is refracted and is easily totally internally reflected on the internal passage 18Ea side.

Further, as shown in FIG. 14, by passing the metal pipe 34 between the support member 18E and the writing portion 14E, the reflection function of the outer surface of the metal pipe 34 is performed even at an angle at which the pen core of the writing portion 14E is originally visible. (Reflection function by surface texture such as total reflection and specular reflection) gives shine like internal total reflection, and the writing part 14E (pen core) in the support member 18E can be hidden from the direction of 360 degrees. ..

Further, when the support member 18E is made of a high refractive index material, total internal reflection is more likely to occur, and the invisible range of the pen core of the writing portion 14E becomes wider.
In the specific product of the support member 18E, as shown in FIG. 14, the concave side surface 18Eb exerts the effect of a concave lens, and as shown in the cross section, the incident direction of the incident light L3 (indicated by the alternate long and short dash line L3). The incident light L3 (reflected at the reference numeral P point) is totally internally reflected within ± 12 degrees with respect to the writing portion 14E, and the pen core becomes invisible. That is, the incident angle becomes large at the point P, and total reflection is likely to occur.

In this case, a structure can be provided in which the reflective pipe 34 is passed through the internal passage 18Ea, the writing portion 14E is passed through the pipe 34, and the pipe 34 covers the pen core of the writing portion 14E.

As a result, the incident light L3 is reflected on the wall surface of the internal passage 18Ea (internally reflected by the support member 18E) and diffusely reflected by the pipe 34, making the entire circumference of the writing portion 14E difficult to see or invisible. The pipe 34 is preferably made of a reflective material such as metal, and is preferably made of stainless steel, aluminum, or nickel-chrome plated.

As described above, in the writing instrument of the fifth embodiment, since the light incident on the support member 18E is totally internally reflected, the internal writing portion 14E cannot be seen, and the stealth property can be improved.
Therefore, the user can give a glittering impression because the internal writing portion 14E is invisible and only the reflected light of the light appears to shine. Further, the pipe 34 can be provided to further enhance the stealth property.

[Writing Instruments of the Sixth Embodiment]
Next, the writing instrument according to the sixth embodiment of the present invention will be described.
The writing instrument according to the sixth embodiment of the present invention has the same shape and appearance structure as the writing instruments of the fifth embodiment shown in FIGS. 12 to 14, and although not shown, the materials of the support members are different. The texture is improved by utilizing the scattering of light.

The support member can be colored blue by Rayleigh scattering by adding fine particles (about several tens of nm) to a transparent resin as its material.
When viewed from a specific angle, 50% or less of the surface area of the support member, which is a transparent member of the hard pen tip, is visible for the content liquid conduction part (cursive such as the pen core of the writing part). Appropriate.
Further, the hard pen tip, that is, the thickest portion of the support member which is a transparent member in the cross section perpendicular to the axial direction LD is 1 mm or more, or the diameter of the flow guide portion (writing portion pen core) 14E and the support member. The ratio of the outer diameters of the transparent members is preferably 1: 3 or more. That is, the outer diameter of the transparent member is preferably three times or more the diameter of the conducting portion 14E.

[Writing Instruments of the 7th Embodiment]
Next, the writing instrument according to the seventh embodiment of the present invention will be described.
15 (a)-(c) show the writing instrument according to the seventh embodiment of the present invention, (a) is a perspective view from the front, (b) is a side view, and (c) is C- of (b). It is a vertical sectional view along the C line. 16 (a)-(d) are parts diagrams of the shaft cylinder of the writing instrument. 17 (a)-(f) is a component diagram of the support member (corresponding to the "holding body") 18F of the writing instrument. Further, FIG. 18 is an explanatory view of the transparency of the support member 18F. In FIGS. 15 to 18, the shaft cylinder 10, the writing ink occlusion body 12, and the leading shaft 20 have the same reference numerals as those in the fifth embodiment of FIGS. 12 to 14.

In the writing instrument according to the seventh embodiment, the support member 18F for supporting the writing portion (pen core) 14F by inserting it inside is formed of a transparent member. Then, as shown in FIGS. 15 and 17, the support member 18F is formed by cutting substantially both side surfaces (front surface when viewed from the user) into flat surfaces when viewed from the front side, and the entire axial cross section is formed as a substantially elliptical outer surface. Is formed into an almost emerald cut shape. Further, in the support member 18F, an internal passage 18F is formed inside the support member 18F in the axial direction to form a hexagonal or rhombic cross section, and the writing portion 14F is inserted through the internal passage 18F. The tip of the internal passage 18F has a circular cross section, and the cross section of the writing portion 14F has a circular cross section.

In this case, the support member 18F is made of the same material as that of the first embodiment, the outer surface 18Fb is formed on a flat surface, and the cross section has a substantially elliptical shape, and the writing is performed in the internal passage 18F. It makes it difficult to see or makes it invisible from the direction of the outer surface 18Fb, which is almost flat while passing through the portion 14F (stealth tippla).
Since the support member 18F has a shape in which a flat surface is largely arranged on the front surface, it is possible to form a shape that can appeal and assert a sense of transparency and a feeling of mass.

The structure of the support member 18F is such that the light entering the support member 18F is refracted so that the light is easily totally internally reflected on the internal passage 18F side. The cross section has a substantially hexagonal shape.

In this case, it will be described that the writing unit 14F is made invisible or invisible. As shown in FIG. 18, in the core shape of the internal passage 18F through which the writing portion 14F passes (the shape of the internal passage 18F), the width W1 in the direction along the visible outer surface 18Fb is narrowed and the angle θ is sharpened (acute angle: angle). θ <90 °) to facilitate total internal reflection. The length W2 in the direction perpendicular to the outer surface 18Fb is W2, and the length W2 is longer than the width W1 (W2> W1). Preferably, 1/2 of the length is longer than the width W1 ((1/2) W2> W1).

By making the angle θ sandwiched between the two sides of the outer surface 18Fb side of the concrete hexagonal cross section (or gentle rhombus shape) sharp in this way, light can be totally internally reflected within the support member 18F. .. This makes it possible to hide the pen core of the writing section 14F. Specifically, as shown in FIG. 18, the reflected light L2 from the internal passage 18F can be deflected laterally without facing the other outer surface 18Fb with respect to the incident light L1 on one outer surface 18Fb. As a result, the back side of the writing unit 14F can be seen, and conversely, the writing unit 14F becomes difficult to see or cannot be seen.

As shown in FIG. 18, by sharpening the core shape of the internal passage 18F (sharp angle θ), the support member 18F is likely to be totally internally reflected on the side surface of the internal passage 18F, and eventually, the internal total reflection occurs. There is also a secondary effect that the writing portion 14F in the internal passage 18F becomes difficult to see, the transparency is increased, and the design is improved.

In the writing instrument of the seventh embodiment, the writing ink storage body 12 is supported by the rib 10a in the barrel 10. By forming the rib 10a, the thin-walled portion and the surface area thereof are reduced as compared with the case where the inside of the barrel 10 is merely a smooth surface, so that the permeation of water from the barrel 10 can be reduced.

As a modification of the seventh embodiment, interference fringes can be formed on the peripheral surface of the support member 18F. In particular, the outer surface 18Fb is flat, and an interference fringe pattern can be formed on the outer surface 18Fb to improve the appearance design.
In this pattern, it is expensive to add the interference fringe pattern to the mold parts. Therefore, we succeeded in producing the interference fringe pattern at low cost by simple machining only by the feed control of the NC processing machine. In the mold, it was mounted as a nest for the flat surface (outer surface). Further, in order to improve the transferability of the interference fringe pattern, a mold structure in which a filling pressure is easily applied is required.

Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples.

[Example 1]
Writing instruments and inks conforming to the following configurations and FIGS. 1 to 4 were used. The dimensions of the writing core, holder, etc. were as shown below.

(Structure of Ink Feeder 15)
PET fiber core, porosity 65%, small diameter part: φ2 x 7 mm + large diameter part: φ4 x 15 mm
(Structure of writing core 16)
PE sintered core, porosity 60%, drawing line width of writing part 16c: 4 mm, ink guiding part: diameter φ
2mm
(Structure of holder 18)
Hard material: Acrylic resin, visible light transmittance 80% [Reflectance was measured with a multi-light source spectrophotometer (MSC-5N) manufactured by Suga Test Instruments Co., Ltd., and used as the visible light transmittance. ]
When viewed from the holding member 18C side at a specific angle, the visible portion of the cursive was 48% of the surface area of the holding body.

(Structure of writing instrument members other than writing core 16 and holder 18)
Ink occlusion body: PET fiber core, porosity 85%, φ10 x 85 mm
Writing tool body, cap: Made of polypropylene (PP)

(Ink composition)
As the ink, an ink having the following composition (total 100% by mass) was used.
Moisturizer: Trimethylglycine (glycine betaine) 7.5% by mass
Pentaerythritol 4.5% by mass
Colorant: NKW-4805 Yellow (manufactured by Nippon Fluorescent Co., Ltd.) 40.0% by mass
Preservative: Bio Ace (manufactured by Keiai Kasei Co., Ltd.) 0.3% by mass
pH regulator: triethanolamine 1.0% by mass
Fluorine-based surfactant: Surflon 8111N (manufactured by AGC Seimi Chemical Co., Ltd.) 0.2% by mass
Water-soluble organic solvent: ethylene glycol 3.0% by mass
Water (solvent): Ion-exchanged water 43.5% by mass

In the writing instrument of the first embodiment, the writing portion is composed of a cursive capable of inducing writing ink from a barrel and a holding body holding the writing body, and the holding body is formed of a hard material having visibility. In addition, since the visible part of the cursive can be seen finely, the visibility of the holding body makes it possible to make the writing part clearer while looking at the part to be written when writing with the writing tool. confirmed.
Further, in the holding body, the wall thickness in the cross section perpendicular to the axial direction and the thickest part are set to 1 mm or more, or the ratio of the outer diameter of the cursive to the outer diameter of the holding body is set to 1: 3. By doing so, it was found that the writing part can be made clearer while looking at the writing target part.
Further, in the first embodiment, since the holding body is provided with the writing portion and the ink supply portion at the central portion and the outer peripheral portion in the radial direction, the ink is supplied from the ink occlusion body to the writing surface portion of the writing body. Since the mechanism is supplied from two directions, the amount of ink supplied is suitable without causing the ink supply to run out.
Furthermore, this writing instrument is set in an automatic writing device, and according to JIS S6037, a writing angle of 65 °, a writing load of 1 N, a speed of 7 cm / s, and a distance of 100 m are used for straight writing, and then the writing state is visually observed. As a result of checking, the ink flow rate is good because the above-mentioned preferable ink composition is used, and while suppressing the drying of the pen tip, the drying of the drawn lines and the low temperature stability of the ink are excellent, and the drawn lines are bleeding. It was found that it expresses a function without strike-through.

The writing instrument of the present invention can be used for writing with writing ink in the writing section.

10 Shaft cylinder 10a Rib 12 Writing ink occlusion 14 Writing part (first embodiment)
14B Writing section (second embodiment)
14E Writing section (fifth embodiment)
14F Writing section (7th embodiment)
16 Writing ink guide (cursive)
16A Writing ink guide (cursive)
18 Support member (holding body according to the first embodiment)
18B support member (holding body according to the second embodiment)
18C support member (holding body according to the third embodiment)
18D support member (holding body according to the fourth embodiment)
18E support member (holding body according to the fifth embodiment)
18F support member (holding body according to the seventh embodiment)
20 Lead shaft 22 Writing porous body 36 Inner plug 36A Inner plug

Claims (3)

A writing instrument having a barrel containing writing ink and a writing portion attached to one end of the barrel, the writing portion guides the writing ink from the barrel to guide the writing ink. The cursive has a cursive capable of writing and a cursive that is inserted through an inner internal passage to hold the cursive and has a substantially elliptical cross section. The holder has a cross section viewed from the front. The cursive is provided on the holding body, which is made of a hard material having a generally elliptical shape and visibility, and 50% of the surface surface of the holding body is visible when viewed from a specific angle. A writing instrument according to the following , wherein the internal passage is formed in a hexagonal or diamond shape in cross section . The writing instrument according to claim 1 , wherein the internal passage has an acute angle between the two sides of the hexagon or rhombus . The writing instrument according to claim 1 or 2 , wherein interference fringes are formed on the peripheral surface of the holder .

Images