Writing instrument

Abstract

To provide a lightweight writing instrument with excellent operability, which does not include accessory devices including a high-pressure gas supply container used in conventional writing instruments that spray ink in a mist to enable drawing, a hand router and a battery for driving the motor.SOLUTION: A writing instrument 1 includes a container body 2 for storing ink, and an atomization nozzle 6 that is attached to a mouth 2d of the container body and sprays the ink in the container body in the form of a mist. The container body is a squeeze container that elastically deforms when pressed by a barrel 2b, applies pressure to the ink, and can restore its original shape due to its own rigidity when the pressure is released. The atomization nozzle is provided with a dip tube 7 that is housed within the container body and supplies ink located at the bottom of the container body to the atomization nozzle by squeezing the container body.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a writing implement that enables drawing by spraying ink into a mist and depositing the mist onto, for example, a paper surface. [Background technology]

[0002] Writing instruments have been proposed that enable drawing by spraying ink into a mist and depositing the mist onto, for example, a paper surface, and the present applicant has also made proposals as disclosed in Patent Documents 1 and 2. That is, Patent Document 1 discloses a writing instrument that combines, for example, a writing instrument containing water-based ink with a gas supply container equipped with a nozzle that can spray compressed gas such as air, and that projects the compressed gas sprayed from the nozzle onto the writing part of the writing instrument, thereby spraying the ink in a mist onto paper or the like.

[0003] Furthermore, Figures 25 to 27 of Patent Document 2 disclose a writing implement that includes a container body that contains ink and has an opening that is equipped with an on-off valve and a metal mesh, and a sputtering unit that faces the metal mesh and has a brush that is rotated by a hand mill. With this writing implement, ink seeping out to the metal mesh side when the on-off valve is opened is sputtered by a rotating brush that is rotated by a hand router, and can be deposited on the surface of paper or the like. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-189671 [Patent Document 2] International Publication No. WO2023 / 63367 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the writing instrument disclosed in Patent Document 1 is equipped with a gas supply container equipped with a nozzle that can spray compressed gas, which requires ancillary equipment including a high-pressure gas supply container in the form of a metal can to avoid the effects of gas pressure. As a result, the writing instrument becomes large, which causes the problem of poor operability. Furthermore, the writing instrument disclosed in Patent Document 2 also requires the preparation of a handheld router and a battery to drive the motor, which, like the writing instrument disclosed in Patent Document 1, increases the overall weight of the writing instrument, making it less user-friendly for writing operations.

[0006] This invention seeks to solve the above-mentioned problems with writing instruments that spray ink in a mist and enable drawing with the mist of ink, and aims to provide a lightweight writing instrument that is easy to operate and does not require the use of accessories such as a conventional high-pressure gas supply container such as a metal can, or a handheld router and batteries for driving its motor. [Means for solving the problem]

[0007] The writing instrument of the present invention, which has been made to solve the above-mentioned problems, is, as described in claim 1, a writing instrument comprising a container body for storing ink, and an atomization nozzle attached to the mouth of the container body for spraying the ink in the container body in the form of a mist, wherein the container body is a squeeze container that elastically deforms when pressed by its body, applying pressure to the ink, and is able to restore its original shape due to its own rigidity when the pressure is released, and the atomization nozzle is equipped with a dip tube that is housed within the container body and supplies the ink located at the bottom of the container body to the atomization nozzle by squeezing the container body.

[0008] Furthermore, as described in claim 2, the writing instrument of this invention is a writing instrument comprising a container body that stores ink, and an atomization nozzle that is attached to the mouth of the container body and sprays the ink in the container body in a mist, wherein the container body is a squeeze container that elastically deforms when pressed by its body, applying pressure to the ink, and that can restore to its original shape due to its own rigidity when the pressure is released, and a temporary reservoir that can store a portion of the ink in the container body is housed within the container body so as to surround the atomization nozzle from behind, and the atomization nozzle is equipped with a dip tube that is housed within the temporary reservoir and supplies the ink located at the bottom of the temporary reservoir to the atomization nozzle by squeezing the container body.

[0009] In this case, a preferred configuration is adopted in which the atomizing nozzle is attached to the mouth of the container body via a nozzle holder that seals the mouth of the container body, and the temporary storage body is attached to the nozzle holder by a locking claw that protrudes from the nozzle holder toward the inside of the container body. [Effects of the Invention]

[0010] According to the invention described in claim 1, when the container body is held upright with the atomizing nozzle attached to the mouth of the container body facing upward, the ink in the container body under pressure can be sent to the atomizing nozzle via the dip tube by squeezing the body of the container body, which causes the atomized ink to be sprayed from the atomizing nozzle, allowing writing to be done on the surface of paper or other objects to be written on. Therefore, according to the writing instrument of claim 1, it is possible to provide a lightweight writing instrument with excellent operability without having to include any accessory equipment such as a high-pressure gas supply container, a hand drill and a battery for driving its motor, as shown in the conventional example.

[0011] Furthermore, according to the invention described in claim 2, a temporary reservoir capable of storing a portion of the ink in the container body is disposed within the container body, and by squeezing the body of the container body, the ink in the temporary reservoir disposed immediately adjacent to the atomization nozzle is supplied to the atomization nozzle via the dip tube. Therefore, the writing instrument according to claim 2 can contribute to shortening the length of the dip tube, which, in addition to the effect of the invention described in claim 1, can reduce the degree to which the ink material solidifies and clogs the dip tube when using ink containing a material that easily solidifies, such as titanium oxide, which will be explained later. [Brief explanation of the drawings]

[0012] [Figure 1] 1A, 1B, and 1C show the overall structure of a writing implement according to a first embodiment of the present invention, excluding a cap, in which FIG. 1A is a front view, FIG. 1B is a side view, and FIG. 1C is a central longitudinal cross-sectional view. [Figure 2] 2A and 2B show an ink mist ejection unit of the writing implement shown in FIG. 1, in which (A) is a cross-sectional view taken along the axial direction, and (B) is a side view. [Figure 3] 3A and 3B show exploded views of the ink mist ejection unit shown in FIG. 2, in which (A) is a cross-sectional view taken along the axial direction, and (B) is a perspective view with the nozzle holder facing forward. [Figure 4] The individual components of the nozzle holder are shown, with (A) being a perspective view with the front side facing forward, (B) being a perspective view with the back side facing forward, (C) being a front view, (D) being a left side view, (E) being a right side view, and (F) being a central longitudinal cross-sectional view. [Figure 5] 10A, 10B, and 10C show the overall configuration of a writing implement according to a second embodiment, excluding the cap, in which (A) is a front view, (B) is a side view, and (C) is a central vertical cross-sectional view. [Figure 6] FIG. 6 is an enlarged partial cross-sectional view including the ink mist ejection unit shown in FIG. 5(C). [Figure 7A] 10A to 10D show an ink mist ejection unit according to a second embodiment, in which (A) is a top view, (B) is a front view, (C) is a left side view, and (D) is a right side view. [Figure 7B]7A and 7B show an ink mist ejection unit according to a second embodiment, in which (A) is a perspective view with the top surface facing forward, (B) is a cross-sectional view taken along line aa in (A) of FIG. 7A in the direction of the arrow, and (C) is a cross-sectional view taken along line bb in (A) of FIG. 7A in the direction of the arrow. [Figure 8] 1A is a perspective view, FIG. 1B is a front view, and FIG. 1C is a vertical cross-sectional view of the ink mist ejection unit. [Figure 9] Shows the individual configuration of the temporary ink reservoir, (A) is a perspective view with the front end facing forward, (B) is a perspective view with the rear end facing forward, (C) is a top view, (D) is a front view, (E) is a left side view, (F) is a right side view, (G) is a cross-sectional view seen in the direction of the arrow from line cc in (C), and (H) is a cross-sectional view seen in the direction of the arrow from line dd in (C). DETAILED DESCRIPTION OF THE INVENTION

[0013] A writing instrument according to the present invention will be described based on an embodiment shown in the drawings. Figures 1 to 4 show a writing instrument according to a first embodiment of the present invention, and Figure 1 shows the overall structure of the writing instrument excluding the cap. First, we will explain the writing instrument according to the first embodiment of the present invention based on Figure 1. In the drawings shown below, the same parts are denoted by the same reference numerals, but in some drawings, due to space limitations, only representative parts are denoted by reference numerals, and details of each part will be explained by citing the reference numerals given in the drawings showing the individual component configurations or exploded view of parts.

[0014] A writing instrument 1 according to the present invention is provided with a bottle-shaped container body 2 that contains writing ink (not shown), as shown in Figure 1. This container body 2 is made of a flat plate with an elliptical bottom 2a so that it can be placed on a horizontal surface in a self-supporting manner, and a body 2b is formed that is continuous with the bottom 2a and stands upright at the top. This body portion 2b forms an inclined body portion 2b1 in which the rising surface on the front side of the container body 2, i.e., the rising surface on the left side of the container body 2 shown in Figure 1(C), decreases in diameter toward the center of the container body 2 as it rises upward. The upright surface on the rear side of the container body 2, that is, the upright surface on the right side of the container body 2 shown in FIG. 1(C), constitutes an upright body portion 2b2 that is substantially perpendicular to the bottom portion 2a.

[0015] A neck portion 2c curved toward the front side of the container body 2 is formed at the top of the upright body portion 2b2, and a cylindrical mouth portion 2d standing diagonally upward is integrally formed along the curved surface of this neck portion 2c. As a result, the intersection angle between the axis of the container body 2, which is perpendicular to the surface of the bottom 2a of the container body 2, and the axis of the mouth portion 2d, which passes through the center of the mouth portion, is an obtuse angle, and in the illustrated example, the intersection angle is set to approximately 120 degrees.

[0016] As explained above, the mouth portion 2d is configured to be located directly above the inclined body portion 2b1, which decreases in diameter as it rises upward toward the center of the container body 2. This prevents the center of gravity of the ink mist discharge unit 4, which includes a nozzle holder 5 and atomizing nozzle 6 (to be described later) attached to the mouth portion 2d, from shifting to the front side of the container body 2 where the mouth portion 2d is formed. In addition, a plurality of finger hook recesses 2e are formed on the front and back sides of the container body 2 so that the fingertips can be hooked when gripping the container body 2. The finger hook recesses 2e function as a non-slip grip when gripping the container body 2.

[0017] The container body 2 is molded from a flexible synthetic resin. This forms a squeeze container that can deform the container body 2 by pressing the left and right trunk portions 2b3 that form the sides of the container body 2 with a hand holding the container body 2. Therefore, pressure can be applied to the ink contained in the container body 2 by squeezing the container body 2. It is well known that the container body 2 that forms the squeeze container described above can restore its original shape due to its own rigidity when pressure is released. The container body 2 contains writing ink (not shown) together with a stirring ball 9 made of a hard or glass ball.

[0018] Furthermore, as shown in FIG. 1(C), an ink mist ejection unit 4 including a nozzle holder 5 and an atomizing nozzle 6 is attached to the mouth 2d of the container body 2 in a state where the mouth 2d is sealed. A male thread 2f is provided on the circumferential surface of the cylinder that forms the mouth portion 2d, and a cap member (not shown) that covers the nozzle holder 5, the atomization nozzle 6, etc. is removably attached using this male thread 2f, thereby forming the writing instrument 1 of the first embodiment.

[0019] 2 and 3 show the ink mist discharge unit 4 that is attached to the mouth 2d of the container body 2. This ink mist discharge unit 4 is made up of a nozzle holder 5 that is attached to the mouth 2d of the container body 2 in a sealed state, an atomizing nozzle 6 that is fitted into the center of the nozzle holder 5, and a dip tube 7 that is molded integrally with the atomizing nozzle 6 and housed inside the container body 2. All of the components that make up the ink mist ejection unit 4 can be made from a resin material.

[0020] FIG. 4 shows the structure of the nozzle holder 5, which is one of the components that make up the ink mist ejection unit 4. This nozzle holder 5 has a cylindrical portion 5a that is fitted into the mouth portion 2d of the container body 2, a circular flange portion 5b that is protruded from the outer periphery of the cylindrical portion 5a and abuts the front end of the mouth portion 2d, a disk-shaped lid portion 5c that is formed adjacent to the front side of the flange portion 5b and closes the mouth portion 2d, and a cylindrical protrusion portion 5d formed in the center of the lid portion 5c.

[0021] The through hole formed in the cylindrical protrusion 5d has a thicker inner diameter in the rear half, forming the fitting mounting hole 5e of the atomization nozzle 6, and a thinner inner diameter in the front half, forming the ejection hole 5f for the ink mist (atomized ink) ejected from the atomization nozzle 6. This nozzle holder 5 is also commonly used for a writing instrument of a second embodiment, which will be described later. For this purpose, a plurality of locking claws 5g are formed to protrude from the rear side of the lid body portion 5c of the nozzle holder 5, i.e., from the inner surface of the nozzle holder 5 that faces the inside of the container body 2 when the nozzle holder 5 is attached to the opening portion 2d.

[0022] On the other hand, the atomization nozzle 6 used in this embodiment is a one-fluid nozzle that can spray ink mist (atomized ink) using only the liquid pressure of the ink, and as described above, the dip tube 7 is integrally molded into this atomization nozzle 6. Note that, as defined in JIS S3301, the dip tube is a component that moves the ink contained in the container body 2 to the nozzle holder 5 while simultaneously restricting the amount of ink sprayed. Therefore, to mount the ink mist discharge unit 4 inside the container body 2, the atomizing nozzle 6 is attached by fitting into the nozzle fitting mounting hole 5e of the nozzle holder 5, as shown in FIG.

[0023] Next, the non-nozzle end of the dip tube 7, which is integrally molded with the atomizing nozzle 6, is inserted through the mouth 2d of the container body 2, and the cylindrical portion 5a of the nozzle holder 5 is fitted and attached within the mouth 2d of the container body 2, thereby attaching the ink mist ejection unit 4 to the container body 2. At this time, since the dip tube 7 is bent into a "L" shape when viewed in cross section in the drawing, the non-nozzle end of the dip tube 7 can be positioned near the bottom 2a of the container body 2 as shown in Figure 1(C).

[0024] According to the writing instrument of the first embodiment described above, when the container body 2 is in an upright writing position with the atomization nozzle 6 attached to the mouth portion 2d of the container body 2 facing up, a predetermined pressure can be applied to the ink stored in the container body 2 by squeezing, for example, the left and right barrel portions 2b3 of the container body 2 [see Figure 1(A)]. As a result, the ink in the container body 2 is supplied to the atomizing nozzle 6 via the dip tube 7, and the atomizing nozzle 6, which is configured as a single-fluid nozzle, can spray ink mist (atomized ink) according to the liquid pressure applied to the ink. Therefore, by adhering this ink mist to the surface of paper, for example, it becomes possible to draw something.

[0025] Figures 5 to 9 show a writing instrument according to a second embodiment of the present invention. In Figures 5 to 9, which show the writing instrument 1 of the second embodiment, parts that perform the same functions as the parts of the writing instrument 1 of the first embodiment already described are designated by the same reference numerals, and therefore detailed description thereof will be omitted where appropriate. In this second embodiment of the writing instrument 1, as shown in Figures 5(C) and 6, a temporary reservoir 15 capable of storing a portion of the ink in the container body 2 is housed and arranged within the container body 2 so as to surround the atomization nozzle 16 from behind. Within the temporary reservoir 15, a dip tube 17 is integrally molded with the atomization nozzle 16 and supplies ink located at the bottom of the temporary reservoir 15 to the atomization nozzle 16 by squeezing the container body 2.

[0026] That is, in the writing instrument 1 of this second embodiment, as shown in Figures 7A, 7B and 8, the ink mist ejection unit 14 is formed by a nozzle holder 5 that is attached in a sealed state to the mouth 2d of the container body 2, an atomization nozzle 16 that is fitted into the nozzle fitting mounting hole 5e (see Figure 4(F)) in the center of the nozzle holder 5 and attached, a temporary ink reservoir 15 that is attached to the nozzle holder 5 by a locking claw 5g that protrudes from the nozzle holder 5 toward the inside of the container body 2, and a dip tube 17 that is molded integrally with the atomization nozzle 16 and housed in the temporary reservoir 15. It should be noted that each of the components constituting the ink mist ejection unit 14 in the second embodiment can also be made of a resin material.

[0027] FIG. 9 shows the structure of the temporary ink reservoir 15, which is one of the components that make up the ink mist ejection unit 14. The temporary ink reservoir 15 has a closed tail end and an open front end, and the open front end is attached to the nozzle holder 5 by a locking claw 5g that protrudes from the nozzle holder 5 toward the inside of the container body 2 as described above, and the temporary ink reservoir 15 is positioned within the mouth 2d of the container body 2.

[0028] This temporary reservoir 15 has a flat surface 15a formed along the axial direction on part of the cylindrically formed circumferential surface, and is attached to the nozzle holder 5 with the flat surface 15a facing upward. Two slit-shaped ink introduction openings 15b are opened in the flat surface 15a along the axial direction so as to be parallel to each other. In addition, at the front end opening of the temporary storage body 15, multiple (six in the illustrated example) notched grooves 15c are formed at approximately equal intervals around the circumference, cutting from the edge of the opening, and a locking protrusion 15d (see Figures 9(G) and (H)) with an arc-shaped cross section is formed along the inside of the opening.

[0029] As a result, the locking protrusions 15d formed on the temporary storage body 15 are engaged with the multiple locking claws 5g formed on the nozzle holder 5 so as to cover them from the outside, thereby attaching the temporary storage body 15 to the nozzle holder 5. At this time, the plurality of cut grooves 15c formed in the front end opening of the temporary reservoir 15 act to provide appropriate flexibility to the locking projections 15d, allowing elastic deformation.

[0030] The atomization nozzle 16 used in the writing instrument of the second embodiment, like the writing instrument of the first embodiment, is a one-fluid nozzle that can spray ink mist (atomized ink) using only the liquid pressure of the ink, and as described above, this atomization nozzle 16 has a dip tube 17 integrally molded therewith. Therefore, to mount the ink mist discharge unit 14 inside the container body 2, the atomizing nozzle 16 is fitted into the nozzle fitting mounting hole 5e of the nozzle holder 5 shown in FIG.

[0031] Next, the non-nozzle end of the dip tube 17 integrally molded with the atomizing nozzle 16 is inserted into the front end opening of the temporary storage body 15, and the locking protrusion 15d formed on the front end opening of the temporary storage body 15 is engaged with the locking claw 5g of the nozzle holder 5, thereby attaching the temporary storage body 15 to the nozzle holder 5 side. In this state, the temporary storage body 15 is inserted through the mouth portion 2d of the container body 2, and the cylindrical portion 5a of the nozzle holder 5 is fitted and attached into the mouth portion 2d of the container body 2, thereby allowing the ink mist ejection unit 14 to be attached to the container body 2.

[0032] At this time, the sealing portion on the tail end side of the temporary storage body 15 is attached to the container body 2 so that it faces slightly downward, as shown in Figures 5 and 6, and the dip tube 17 integrally molded with the atomizing nozzle 16 is bent in a "L" shape, so that the non-nozzle end of the dip tube 17 can be positioned near the bottom of the temporary storage body 15.

[0033] In the writing instrument 1 of the second embodiment described above, by turning the mouth portion 2d of the container body 2 downward, the ink in the container body 2 can be introduced into the temporary reservoir 15 through the ink introduction opening 15b formed in the temporary reservoir 15. In this case, it is preferable that the temporary reservoir 15 has an ink storage capacity of 1 ml to 10 ml. Next, with the atomization nozzle 6 attached to the mouth 2d of the container body 2 facing up and the container body 2 in an upright writing position, a predetermined pressure can be applied to the ink stored in the temporary storage body 15 by squeezing, for example, the left and right body portions 2b3 of the container body 2 (see Figure 5(A)).

[0034] As a result, the ink in temporary reservoir 15 is supplied to atomizing nozzle 16 via dip tube 17, and atomizing nozzle 16, which is configured as a single-fluid nozzle, can spray ink mist (atomized ink) according to the liquid pressure applied to the ink. Therefore, by adhering this ink mist to the surface of paper, for example, it becomes possible to draw something.

[0035] The following ink compositions are preferably used in the writing instruments 1 of the first and second embodiments.

[0036] (Ink composition) This ink composition is primarily made of water and contains a hiding pigment. The ink composition has a shear thinning index of 0.4 to 0.8 at a shear rate of 9.6 to 76.6 / s. The shear thinning index is a value that indicates a measure of the change in apparent viscosity in response to a change in shear rate, and means that n satisfies the following relational expression: This shear thinning index can be measured using, for example, a rheometer or a cone-plate rotational viscometer. τ=ηDn (wherein τ represents shear stress, D represents shear rate, and η represents apparent viscosity)

[0037] The viscosity of the ink composition at a shear rate of 38.3 / s is preferably 5 to 50 mPa·s in order to satisfy the above-mentioned shear thinning index. This viscosity can be adjusted mainly by using a thickener. The viscosity can be measured using the cone-plate type rotational viscometer (1°34′R24 cone) mentioned above.

[0038] The ink composition preferably has a dynamic surface tension of 25 to 55 mN / m at 25°C and 100 ms, from the viewpoint of making the mist generated when the ink is sprayed from an atomizing nozzle denser and thus further reducing the occurrence of unevenness. This dynamic surface tension can be adjusted by using a surfactant, a water-soluble organic solvent, etc.

[0039] The ink composition can have a static surface tension of 20 to 50 mN / m at 25° C. This static surface tension can be adjusted by using a surfactant, a water-soluble organic solvent, or the like.

[0040] The dynamic surface tension and static surface tension can be measured using, for example, a surface tensiometer.

[0041] The ink composition preferably contains a surfactant, from the viewpoint of effectively reducing the dynamic surface tension and static surface tension of the ink composition. When the ink composition contains a surfactant, the surfactant content is preferably 0.05 to 5.0 mass %, from the viewpoint of achieving a balance between the hiding power and a good shear thinning index of the ink.

[0042] (Ink composition: water) The water can be ion-exchanged water, distilled water, or the like.

[0043] (Ink composition: opacifying pigment) Examples of the opacifying pigment that can be used include titanium oxide, zinc oxide, and aluminum.

[0044] The average particle size of the opacifying pigment is not particularly limited as long as the opacifying properties of the ink can be ensured, but is preferably 150 nm to 15 μm. The average particle size here is selected appropriately depending on the size of the target opacifying pigment, and for particles less than approximately 1 μm, it is the histogram average particle size (D50) value from the scattering intensity distribution measured by dynamic scattering, and for particles 1 μm or larger, it is the D50 value calculated on a volume basis using laser diffraction.

[0045] In particular, when the hiding pigment is titanium oxide, the average particle size can be 150 nm to 1 μm, and when the hiding pigment is aluminum, the average particle size can be 1 to 15 μm.

[0046] (Ink composition: colorant) As the coloring material, various coloring materials that can be used in conventional inks can be used, such as dyes, pigments, or mixtures of dyes and pigments. These coloring materials can be used alone or in combination.

[0047] As the dye, any of the direct dyes, acid dyes, basic dyes, mordant / acid mordant dyes, alcohol-soluble dyes, azoic dyes, sulfide / sulfide vat dyes, vat dyes, disperse dyes, oil-soluble dyes, food dyes, metal complex dyes, salt-forming dyes, dyes dyed on resins, and the like, which are used in ordinary dye ink compositions, and aqueous solutions of these dyes can be used.

[0048] Examples of pigments that can be used include inorganic pigments such as carbon black and graphite, organic pigments such as talc, silica, alumina, mica and alumina silicate, azo pigments, condensed azo pigments, phthalocyanine pigments, anthraquinone pigments, quinacridone pigments, isoindolinone pigments, diketopyrrolopyrrole pigments and various lake pigments, fluorescent pigments, pearl pigments, and the like.

[0049] (Ink composition: water-soluble organic solvent) As the water-soluble organic solvent, glycols such as glycerin, propylene glycol, and ethylene glycol, glycol ethers such as ethylene glycol monomethyl ether and propylene glycol monomethyl ether, and the like can be preferably used.

[0050] (Ink composition: thickener) As the thickener, for example, natural polymers such as polysaccharides or synthetic polymers can be used.

[0051] Examples of polysaccharides that can be used include gum arabic, tragacanth gum, guar gum, locust bean gum, alginic acid, carrageenan, gelatin, xanthan gum, welan gum, succinoglycan, diutan gum, dextran, methylcellulose, ethylcellulose, hydroxyethylcellulose, carboxymethylcellulose, starch glycolic acid, and salts thereof.

[0052] Examples of synthetic polymers that can be used include polyvinylpyrrolidone, polyvinyl methyl ether, polyacrylic acid and its salts, polyethylene oxide, vinyl acetate-polyvinylpyrrolidone copolymer, styrene-acrylic acid copolymer and its salts, and isobutylene-maleic anhydride copolymer and its salts.

[0053] (Ink composition: surfactant) Any surfactant can be used as the surfactant, but it is preferable to use at least one surfactant selected from the group consisting of fluorine-based surfactants, acetylene glycol-based surfactants, and silicone-based surfactants, from the viewpoint of more effectively reducing the dynamic surface tension of the ink composition. Commercially available surfactants can be used as these surfactants.

[0054] (Ink composition: other components) The ink composition may contain various additives, such as preservatives, adhesives, pH adjusters, and non-drying agents.

[0055] The writing instrument of the present invention described above eliminates the need for accessory equipment such as a high-pressure gas supply container used in conventional writing instruments that spray ink in a mist to enable drawing, and a handheld router and a battery for driving its motor. Therefore, a writing instrument that is lightweight and has excellent operability can be provided, and the effects described in the section on the effects of the invention above can be achieved. [Explanation of symbols]

[0056] 1 writing implements 2 Container body 2a bottom 2b Torso 2c neck 2d mouth 4 Ink mist ejection unit 5 nozzle holder 5a Cylindrical body part 5b Tsubabe 5e Nozzle fitting mounting hole 5f Ink mist nozzle 5g locking claw 6. Atomizing nozzle (single-fluid nozzle) 7 Dip Tube 14 Ink mist ejection unit 15 Temporary storage body 15a Flat part 15b Ink introduction opening 16 Atomizing nozzle (single-fluid nozzle) 17 Dip tube

Claims

1. A writing implement comprising a container body that contains ink, and an atomizing nozzle that is attached to the opening of the container body and sprays the ink in the container body in a mist form, the container body is a squeeze container that elastically deforms when a body portion is pressed to apply pressure to the ink, and that can restore its original shape due to its own rigidity when the pressure is released, A writing instrument characterized in that the atomization nozzle is equipped with a dip tube that is housed within the container body and supplies the ink located at the bottom of the container body to the atomization nozzle by squeezing the container body.

2. A writing implement comprising a container body that contains ink, and an atomizing nozzle that is attached to the opening of the container body and sprays the ink in the container body in a mist form, the container body is a squeeze container that elastically deforms when a body portion is pressed to apply pressure to the ink, and that can restore its original shape due to its own rigidity when the pressure is released, A temporary reservoir capable of storing a portion of the ink in the container body is accommodated and disposed within the container body so as to surround the atomizing nozzle from behind, The atomization nozzle is provided with a dip tube that is housed in a temporary reservoir and supplies the ink located at the bottom of the temporary reservoir to the atomization nozzle by squeezing the container body.

3. The writing instrument described in claim 2, characterized in that the atomizing nozzle is attached to the mouth of the container body via a nozzle holder that seals the mouth of the container body, and the temporary storage body is attached to the nozzle holder by a locking claw that protrudes from the nozzle holder toward the inside of the container body.

Images