TW202327899A - Brush tip unit, production method for brush tip unit, and liquid applicator using brush tip unit - Google Patents

Abstract

Provided is a liquid applicator which enables stable application of multiple lines at a time and easy control of the lines to be applied, and in which a defect in discharging liquid is less likely to occur. Provided is a brush tip unit of a liquid applicator, the unit comprising: a single brush tip that is formed of a monofilament having a tapered leading-end portion; and a mouthpiece that is provided so as to cover the outer circumference of a section, except for the point at the leading-end, of the leading-end portion of the brush tip. The leading-end portion of the mouthpiece has an opening that is divided by one or more partitions so as to form multiple holes. The point of the brush tip forks along said holes of the mouthpiece.

Description

Pen tip unit, manufacturing method of pen tip unit, and liquid applicator using pen tip unit

The present invention relates to a nib unit used in liquid applicators such as cosmetics and writing utensils, a method for manufacturing the nib unit, and a liquid applicator using the nib unit. In particular, it relates to a liquid applicator capable of drawing multiple lines at one time.

The liquid applicator includes a type in which the liquid is relayed from the rear end portion of the pen point to the front end portion, a type in which the liquid is soaked in the front end portion of the pen point, and the like. This type of liquid applicator has been widely used as an indispensable item in cosmetics, writing tools, and the like since it was launched on the market. In addition, among the nibs of the liquid applicator of the type that relays the liquid, there are known types that use a porous material and a bundle of synthetic fibers bonded with a resin, and a type that bundles monofilaments that are tapered at the tip. wait.

Conventionally, in such a liquid applicator, when drawing a plurality of lines at a time, a synthetic fiber core in which a bundle of synthetic fibers is adhered to by resin has been used. As shown on the left side of Fig. 6(a), it is an example of arranging a plurality of synthetic fiber cores that have been cut into a suitable tip shape for the tip portion, and inserting the synthetic fiber cores into the nib after bonding the synthetic fiber cores together, or As shown on the right side of FIG. 6( a ), an example is shown in which the front end of one synthetic fiber core is punched into a fork shape and inserted into the nib. However, if a synthetic fiber core is used to draw a line, for example, on a base coated with a foundation or a base coated with a color material, there is a problem of clogging of the foundation or color material or poor ejection at the tip of the pen tip. . This is because the space formed between the attached fibers becomes a liquid conduction path, but when cutting or punching the tip of the nib, the liquid conduction path at the tip is broken or burrs are generated in the middle. , so as to block the liquid conduction path, resulting in that the liquid cannot be smoothly supplied to the tip of the pen. At the same time, the particles of the applied foundation or color material will adhere to and enter the front end of the pen tip, thereby blocking the liquid conduction path. In FIG.6(b) and FIG.6(c), the example of the front-end|tip part of the pen tip of the synthetic fiber core clogged with the particle|grains of a foundation is shown. In addition, synthetic fiber cores are less elastic than pens made of bundled monofilaments tapered at the tip, so it is difficult to finely control when drawing pen lines (lines), and it is especially difficult to adjust the thickness of the lines. topic.

Patent Document 1 discloses a liquid applicator in which a plurality of porous materials such as the above-mentioned synthetic fiber cores are arranged and inserted into a nib so that a plurality of lines can be drawn at one time. However, since a plurality of pen tips are used for one liquid applicator, there is a problem of high cost. Also, as mentioned above, when the pen tip is a synthetic fiber core, if the line is drawn on the basis of being coated with a foundation or a color material, it will exist in the front end of the pen tip, and the foundation or color will appear. Material clogging or poor discharge.

Patent Document 2 discloses a liquid applicator that supplies a liquid to a pen tip formed by bundling monofilaments with tapered ends through a relay core. However, since there is only one tip of the pen tip, there is a problem that a plurality of lines cannot be drawn at one time. In addition, when a plurality of lines are drawn separately, it is difficult to control the coating line, and there is a problem that it is impossible to coat lines with uniform thickness or width.

We are studying a method of using multiple nibs made of bundled monofilaments with tapered ends, and assembling them to the nib. However, since it is necessary to insert the relay cores for the respective pen nibs, there is a problem of physical difficulty. When the relay core is not used, the liquid needs to be supplied only by the weak capillary force of the pen tip, so there is a problem that unevenness is likely to occur in the coating line. In addition, since it is necessary to use a plurality of pen tips and a plurality of relay cores for one liquid applicator, there is also a problem that the cost becomes higher.

Patent Document 3 discloses a technique in which a plurality of synthetic fiber cores are welded and connected on the side opposite to the pen edge. However, as in Patent Document 1, since multiple nibs are used for one liquid applicator, there is a problem of high cost, or if a line is drawn on a base coated with a foundation or a base coated with a color material , then there is a problem that clogging of the foundation or the color material or poor discharge occurs at the front end portion of the pen tip.

[Patent Document 1] Utility Model Registration No. 3137562 [Patent Document 2] Japanese Patent Application Publication No. 7-35084 [Patent Document 3] Japanese Unexamined Patent Publication No. 2010-207301

The present invention was made in view of the above circumstances, and its object is to provide a liquid applicator that can stably coat multiple lines at one time, is easy to control the coating lines, and is less prone to failure of liquid discharge.

In order to solve the above-mentioned problems, the nib unit of the present invention is characterized in that it includes: a nib made of monofilament with a tapered front end; The outer circumference of the part other than the tip of the nib, the opening of the front end of the nib is divided by one or more partitions, and a plurality of holes are formed, and the nib of the nib is bifurcated along the plurality of holes of the nib.

A relay core may be further provided, and the outer periphery of the front end portion of the relay core is covered by the rear end portion of the pen tip.

The cross-section of the opening at the front end of the nib may be oval or rounded rectangle.

In the cross section of the opening, two or more of the spacers may be oriented in the longitudinal direction in parallel, or the number of the spacers may be one.

In the cross section of the opening, the orientation of the longitudinal direction of the two or more separators may be parallel and at right angles to the longitudinal direction of the opening.

In the cross section of the opening, it is preferable that the plurality of holes are arranged in a row with respect to the longitudinal direction of the opening.

The aforementioned partition can be integrally formed with the aforementioned nib.

It is preferable that the material of the aforementioned nib is a tapered filament made of polyester or a tapered filament made of nylon.

The material of the aforementioned relay core is preferably nylon fiber, polyester fiber, acrylic fiber or their mixed fibers.

The manufacturing method of the nib unit of the present invention is characterized by comprising: the step of inserting the nib from the rear end of the nib; and branching the nib of the nib along the plurality of holes in the opening of the nib. the steps.

It may further include the step of inserting the front end portion of the relay core into the rear end portion of the aforementioned pen tip.

The liquid applicator of the present invention uses the above-mentioned pen tip unit. [Effect of the invention]

According to the present invention, it is possible to provide a liquid applicator capable of stably coating a plurality of lines at a time, which is easy to control the coating lines, and which is less likely to cause poor discharge of liquid. Since there are no burrs generated during the cutting process or punching process of the pen tip, it is difficult to clog the liquid conduction path, and the liquid can be smoothly supplied to the front end of the pen tip. Furthermore, particles such as applied foundation or color material are not easy to adhere to the front end of the pen tip, and even if the particles are attached, they will be easily restored to their original shape by the flow of the supplied liquid, so from this point of view, it is also difficult to clog The liquid conduction path can smoothly supply the liquid to the front end portion of the nib. In addition, since the tip of the pen can be made more elastic than a synthetic fiber core, it is possible to provide a liquid applicator that can control the line of the pen from thin lines to thick lines. Furthermore, since only one expensive pen tip is used as a member, the manufacturing cost can be suppressed.

The pen point unit of the present invention includes a pen point and a nib. An example is shown in FIGS. 1 to 5 . Hereinafter, symbols are added to the description, but the present invention is not limited. Furthermore, in the specification of the present application, "front end" refers to the most front end (position) of the liquid applicator on the pen edge side in each part or part, and "rear end" refers to the liquid in each part or part. The rearmost part (position) of the applicator on the side opposite to the pen edge, "front end" refers to the front end and the proximal part of the front end in each part, and "rear end" refers to the rear end of each part The proximal part of the end and the rear end. In addition, the "front end side" means the side of the stroke, and the "rear end" means the side opposite to the stroke.

(Structure of the nib) The nib 3 of the present invention is provided for writing with the tip of the nib 3 using the liquid supplied from the rear end of the nib 3 from the relay core 4 described later or the liquid immersed in the front end of the nib 3 . The nib 3 is partitioned by the nib 2 that covers the outer periphery of the tip portion of the nib 3 except for the tip. Also, one nib is inserted into one nib 2 .

The nib 3 is composed of a monofilament whose tip portion is tapered. The material of the nib 3 is not particularly limited as long as it is tapered monofilament, and can be selected arbitrarily. As an example of the material of the pen tip 3, tapered filaments made of PBT (polybutylene terephthalate), tapered filaments made of PET (polyethylene terephthalate), PTT (polyethylene terephthalate), Polyester tapered filaments such as methyl ester) tapered threads, nylon tapered threads, PPS (polyphenylene sulfide) tapered threads, fluororesin tapered threads, etc. Among these, tapered filaments made of PBT (polybutylene terephthalate) and tapered filaments made of nylon are preferable from the viewpoint of versatility.

The diameter of the monofilament of the pen tip 3 is appropriately set according to the use or purpose of the liquid applicator 10 using the pen tip unit 1 . The range of 0.05-0.30 mm is preferable, and the range of 0.10-0.20 mm is more preferable from a viewpoint of a pen feeling or touch.

In order to form a structure in which the rear end portion of the pen tip 3 covers the outer periphery of the front end portion of the relay core 4 , for example, a method of inserting the relay core 4 into the pen tip 3 may be used. In order to facilitate the insertion of the relay core 4 into the nib 3 , it is preferable to provide a hole at the rear end of the nib 3 . The diameter of the hole is the same as or slightly smaller than the outer diameter of the front end side of the relay core 4 . As long as it can be inserted by the elastic force of the relay core 4, the diameter of the hole of the nib 3 can be slightly smaller than the outer diameter of the front end side of the relay core.

In order to dispose the nib 2 covering the outer periphery of the front end of the nib 3 except for the tip of the pen so that it does not misalign with the rear end of the nib 3, it is preferable that the nib 3 not only covers the front end but also the nib 2. It is preferable to cover the outer periphery of all parts (including the rear end part) except for the tip of the pen, or to provide a flange part on the rear end part of the pen point 3 . This flange portion can fix the position of the rear end portion of the nib 2 . The hole and the flange can be set, for example, by cutting the monofilament bundle whose front end is tapered to a predetermined length (slightly longer than the total length of the pen tip) at the rear end, and heating the cut surface For welding, a flange portion is formed during welding, and the central part of the welded cutting surface is hollowed out into a circular shape with the diameter of the hole of the nib 3, together with the monofilament welded to the central part of the hollowed out cutting surface. Take out and remove.

Furthermore, as long as it is a structure capable of fixing the pen point 3, it is also possible to have a structure in which the outer periphery of the rear end portion of the pen point 3 is not covered with the nib 2 .

The shape of the cross-section of the nib 3 is not particularly limited as long as it can be inserted along the shape of the cross-section of the inside of the rear end portion of the nib 2 described later, and examples include a circle, an ellipse, a square, a rectangle, or a circle. Angled polygons, etc. Among them, from the point of view of making it easy to insert the tip of the nib 3 into the nib 2 smoothly, a circle or ellipse with rounded corners, or a polygon with rounded corners is preferred, since the nib 3 is not easy to slide along in the nib 2 during assembly. From the viewpoint of circumferential rotation and ease of insertion, an ellipse or a rectangle with rounded corners is preferable.

(The structure of the nib) The nib 2 of the present invention is provided so as to cover the outer periphery of the tip portion of the nib 3 except for the tip on the tip side. Moreover, as shown in FIG.2(a) - FIG.2(d), the opening part of the front-end|tip part of the nib 2 is divided by one or more partition members 5, and several holes are formed.

An example of the structure of the nib 2 will be described with reference to FIG. 2 . Fig. 2 (a) is a cross-sectional view of the opening of the front end of the nib, and Fig. 2 (b) is a longitudinal sectional view cut along the longitudinal direction in such a way as to pass through the center of the short side of the opening of the front end, FIG. 2( c ) is a longitudinal sectional view cut in the direction of the short side so as to pass through the center of the long side of the opening at the front end, and FIG. 2( d ) is a perspective view. Since the cross-section of the opening at the rear end of the nib 2 is circular, the inner diameter 2a' of the opening at the rear end of the nib 2 is the same as the inner diameter 2b', approximately 2.5 mm to 5.0 mm. The cross section of the front end portion of the nib 2 has an elliptical shape (rounded rectangular shape). The length 2a of the short side of the opening at the front end of the nib 2 is smaller than the length (inner diameter) 2a' of the short side of the opening at the rear end, for example, about 1.8 mm to 4.0 mm. Also, the length 2b of the long side of the opening at the front end of the nib 2 is the same as or slightly smaller than the length (inner diameter) 2b' of the long side of the opening at the rear end, for example about 2.5 mm to 5.0 mm. The length 2c of the longitudinal section of the nib 2 is, for example, about 10 mm to 20 mm. Two spacers 5 are arranged in parallel at the opening at the front end of the nib 2 , and the longitudinal direction of the cross section of the spacer 5 is at right angles to the longitudinal direction of the opening at the front end of the nib 2 . Three holes are formed in the opening of the front end by the two spacers 5 . The thickness of the separator 5 is exemplified as about 0.3 mm to 1.0 mm, and the length (depth of the separator) 5 c of the longitudinal section of the separator 5 is exemplified as about 0.5 mm to 3.0 mm. The two spacers 5 are formed to separate the long sides of the opening at the front end of the nib 2 at approximately equal intervals. It is better that the separator 5 is integrally formed with the nib 2 .

Next, another example of the structure of the nib 2 will be described with reference to FIG. 3 . Figure 3 (a) is a cross-sectional view of the front end of the pen mouth 2, Figure 3 (b) is a cross-sectional view of the rear end of the pen mouth 2, and Figure 3 (c) is a cross-sectional view through the opening of the front end A longitudinal sectional view of the center of the short side cut along the long side direction, Fig. 3(d) is a longitudinal sectional view of the center of the long side of the opening at the front end cut along the short side direction. Since the cross section of the opening of the rear end of the nib 2 is elliptical, the length 2a' of the short side of the opening of the rear end of the nib 2 is longer than the length 2b' of the long side of the opening of the rear end. Small, in the relationship of 2a'<2b'. 2a' shows about 2.0 mm to 4.0 mm, and 2b' shows about 2.5 mm to 5.5 mm. The cross section of the front end of the nib 2 is elliptical. The length 2a of the short side of the opening at the front end of the nib 2 is smaller than the length 2a' of the short side of the opening at the rear end, for example, about 1.8 mm to 3.6 mm. Also, the length 2b of the long side of the opening at the front end of the nib 2 is the same as or slightly smaller than the length 2b' of the long side of the opening at the rear end, for example about 2.5 mm to 5.0 mm. The length 2c of the longitudinal section of the nib 2 is, for example, about 10 mm to 20 mm. Two spacers 5 are arranged in parallel at the opening at the front end of the nib 2 , and the longitudinal direction of the cross section of the spacer 5 is at right angles to the longitudinal direction of the opening. Three holes are formed in the opening of the front end by the two spacers 5 . The thicknesses 5b1 and 5b2 of the separator 5 are respectively about 0.3 mm to 1.0 mm, and the length (depth of the separator) 5 c of the longitudinal section of the separator 5 is about 0.5 mm to 3.0 mm. The two spacers 5 are formed so as to space apart the long sides of the opening at substantially equal intervals. The length 5a of the partition 5 in the cross section of the opening at the front end is preferably longer than the lengths (2b1, 2b2, 2b3) of the holes in the longitudinal direction of the cross section of the opening, but is not limited thereto. It is better that the separator 5 is integrally formed with the nib 2 .

When the nib 3 is assembled to the nib 2 , the tip of the nib 3 is branched by a plurality of holes formed in the opening at the front end of the nib 2 . Therefore, the shape, area, and number of holes (the maximum number of threads to be applied at one time) are not particularly limited as long as the tip of a pen can be inserted. One partition 5 may be arranged for the opening of the front end of the nib 2 to divide it into two, or two or more partitions may be arranged randomly or in parallel with the orientation of the longitudinal direction of the nib 2. 5. Furthermore, the plurality of spacers 5 whose longitudinal orientation is parallel may be arranged at right angles to the longitudinal direction of the opening at the tip of the nib 2 , or may be arranged obliquely with an added angle. Also, the center of the opening at the front end of the nib 2 may be used as a center point such as a hub, and the plurality of spacers 5 may be arranged radially. Furthermore, the shape of the separator 5 may be processed so that each of the plurality of holes has a substantially circular shape. Among them, from the viewpoint of making the tip of the tip of the nib 3 easily inserted into the hole formed in the opening of the tip of the nib 2 and easily bifurcated, a part of the contour of the hole in the cross section is arc-shaped ( with rounded corners) and/or a rectangular shape with long sides even if all the contours of a hole are straight. It is more preferable that the longitudinal direction of the rectangular hole is at right angles to the longitudinal direction of the opening at the front end of the nib 2 . This is because the stroke of the nib 3 deformed along the longitudinal direction of the opening at the front end of the nib 2 can be overlapped with the short direction of the opening (the longitudinal direction of the hole) to secure the area, that is, the amount of the stroke ( place). Also, the area of the hole is preferably within a predetermined range, more preferably within a range of about 1 mm ² to 4 mm ² . Furthermore, in the case of actually drawing multiple lines at once with a cosmetic or writing tool, it is required to be able to apply with the same thickness and the same width, so it is better to divide the strokes equally and arrange them in a row. Therefore, on the basis of making the opening of the front end of the nib 2 an ellipse or a rectangle with rounded corners, the two spacers 5 are arranged in parallel at right angles to the longitudinal direction of the opening, Furthermore, a structure in which three holes are arranged in a row along the longitudinal direction of the opening is more preferable.

The cross section of the opening at the rear end of the nib 2 is appropriately selected to have a shape or area capable of inserting the relay core 4 so that the pen tip 3 can be easily inserted and a sufficient amount of liquid can be supplied to the pen tip 3 . In addition to circular shapes and elliptical shapes, polygonal shapes such as triangles, squares, and rectangles with rounded corners may be used. In the case of a circular shape, the cross-sectional area can be maximized by maximizing the diameter. In addition, in the case of an oval shape or a polygonal shape with rounded corners, the nib 3 does not rotate in the circumferential direction relative to the nib 2 when inserted, and assembly becomes easy. Wherein, in order to shrink and deform the front end portion of the nib 3 easily and smoothly along the shape of the opening of the front end of the nib 2 when the nib 3 is inserted, the shape of the opening of the rear end of the nib 2 is the same as the opening of the front end. The shape of the parts is roughly similar, an oval shape or a rectangle with rounded corners is preferred.

The material of the nib is not particularly limited as long as the nib can be fixed, and ABS resin, PP resin, etc. can be used. Also, the shape of the outer side of the nib is designed in consideration of the shape of the liquid applicator that accommodates the nib unit.

(Structure of relay core) The relay core 4 is a core designed to supply liquid from the rear end of the pen point 3, that is, to “relay” the liquid to the pen point 3, and the front end portion is ground into a tapered shape. The rear end portion of the relay core 4 is immersed in the liquid, and the liquid is sucked to the front end by the capillary force of the relay core 4 . The front end portion of the relay core 4 is covered by the nib 3, and the liquid sucked up by the capillary force is supplied to the nib. The rear end side of the front end portion of the intermediate core covered by the nib is further covered by the nib.

The material of the relay core 4 is arbitrarily selected to have a porous shape and to be able to supply liquid to the pen tip 3 by capillary force. As an example, nylon fiber, polyester fiber, acrylic fiber, or these mixed fibers are mentioned. Also, the porosity of the relay core 4 is not particularly limited, and for example, about 30 to 90% is appropriately selected. The size of the relay core 4 is appropriately set according to the cross-sectional shape or cross-sectional area of the rear end of the pen tip 3 to be inserted, the use of the liquid application tool 10, etc., and the diameter is about 1.5 mm to 3.0 mm, and the length is 25 mm to 60 mm. Left or right is better.

(nib unit) The nib unit 1 is provided with the above-mentioned one nib 3 and the nib 2 arranged to cover the outer periphery of the tip portion of the nib 3 except for the nib on the front end side. A plurality of holes are formed in the opening at the front end of the mouth 2, and the tip of the nib 3 branches along the holes (see FIG. 1 ). In addition, the pen point unit 1 further includes an intermediate core 4, and may have a structure in which the outer periphery of the front end portion of the intermediate core 4 is covered by the rear end portion of the pen tip 3.

The assembly (manufacturing) method of the nib unit includes: the step of inserting the nib 3 from the rear end of the nib 2; (a), Figure 4(b)). Furthermore, a step of inserting the front end portion of the relay core 4 into the rear end portion of the pen tip 3 may also be included (see FIG. 4( c )). Here, if the tip of the pen point 3 is branched along the plurality of holes in the opening of the nib 2, the tip will be scattered, but when the liquid is supplied, the fibers of the tip will stick together, so the holes can be drawn clearly. The number of roots of the line. Furthermore, a step of trimming the tip of the forked pen may be included for external appearance confirmation at the time of delivery as parts, etc. (see FIG. 4( d )). For example, by immersing a 0.1% aqueous solution of PVA (polyvinyl alcohol) at the tip of each pen, the shape can be modified by bonding fibers to each other by surface tension.

(liquid applicators) The pen tip unit 1 of the present invention can be applied to liquid applicators 10 such as various cosmetics and writing instruments. For example, it can be applied to cosmetic liquid applicators such as eyeliner, eyeshadow, eyebrow pencil, lip liner, lip gloss, concealer, nail care products, and eyelash care products. Also, for example, it can be applied to writing liquid applicators, medical liquid applicators, etc. of oil-based markers, water-based markers, whiteboard markers, line markers, paint markers, correction pens, and medical markers. [Example]

Hereinafter, examples of the present invention will be specifically described, but the present invention is not limited by these examples.

(Example 1) -nib- Bundle PBT (polybutylene terephthalate) monofilaments with a diameter of 0.15mm tapered at the tip, using a root diameter of 3.2mm, a total length of 21.0mm, and a flange outer diameter of 3.7mm. , The thickness of the flange part is 0.5mm, and the diameter of the relay core insertion hole is 1.4mm.

- Nib - Injection-molded polypropylene, the following nib 2 was used: the length 2c in the longitudinal section is 14 mm, the opening at the rear end is circular and the inner diameters 2a', 2b' are 3.2 mm, and the opening at the front end is The opening has an elliptical shape, the long side 2b is 3.1mm, the short side 2a is 2.0mm, the number of spacers 5 is two, the length 5a of the spacer 5 is 2.0mm, and the thicknesses 5b1 and 5b2 of the spacers 5 are 0.4mm, The depth 5c of the separator 5 is 2mm, the number of holes in the opening of the front end is three, the lengths of the holes in the longitudinal direction of the cross section of the opening are 2b1, 0.75mm, 2b2, 0.8mm, and 2b3, 0.75mm. The distance between centers is 1.175mm. The hole in the center (hole with length 2b2) has an area of 1.60 mm ² , and the holes on its sides (holes with length 2b1, 2b3) have an area of 1.17 mm ² respectively.

-Relay core- The relay core 4 was used as a molded body having an outer diameter of 2.0 mm, a total length of 35 mm, and a molded body having a monofilament diameter of 5d (denier) and a polyurethane resin with a porosity of 60%.

-Assembly of the nib unit- The nib 3 is inserted from the rear end of the nib 2, and the flange portion of the nib is brought into contact with the nib rear end fixing portion of the nib. Next, the relay core 4 is inserted into the hole at the rear end of the pen point 3 . A 0.1% aqueous solution of PVA was dipped in the tip of the tip of the pen point 3, trimmed, and then dried. During assembly, the tip of the pen can be smoothly inserted without clogging the three holes in the opening at the front end of the nib 2 .

-Assembly to liquid applicator for evaluation test- The assembled nib unit was installed in a container filled with 0.7 g of cotton wool (monofilament diameter 5d, porosity 90%) of dye ink for eyebrow pencil with viscosity 2.5 cps, specific gravity 1.00, pH 7.4, and obtained The liquid applicator 10 for the evaluation test was evaluated.

-note experiment 1- Using the liquid applicator 10 for the evaluation test, 10 lines of 10 cm were drawn on a biological skin sheet (manufactured by Beaulax Co., Ltd., model P001-001) coated with foundation, and observed with a microscope and visually. The state of the surface of the pen tip 3 of the liquid applicator 10 after writing. The case where no clogging of the foundation was found was made ◯, and the case where clogging was found was made x. Table 1 shows the results of the notebook test. No clogging of the foundation was found on the surface of the pen point 3 of Example 1.

-note experiment 2- Using the liquid applicator 10 for the evaluation test, a plurality of lines were written on paper with a writing load of 1 g, 5 g, and 10 g, and the line width, spacing between lines, unevenness, and ink flow were confirmed. Regarding ink flow, the case where there was no unevenness of the pen line was set to ◯, and the case where there was unevenness of the pen line was set to x. Table 1 shows the results of the notebook test. In Example 1, all pen lines were found to be free from unevenness, and the ink flow was also good. When the load was increased, it was found that the line width became wider and the intervals between the lines became smaller. Specifically, it was found that the average line width was 0.175 mm at a load of 1 g, 0.715 mm at 5 g, and 0.93 mm at 10 g. Based on the load of 1 g, the average line width was about 4.1 times that at 5 g and about 5.3 at 10 g. times. In addition, it was found that both the line width and the interval can be controlled to be substantially constant.

(Example 2) -nib- Bundle monofilaments made of PBT (polybutylene terephthalate) with a diameter of 0.15mm tapered at the tip, using a root length of 3.2 mm, a root length of 2.4 mm, and a total length of 21.0 mm, the outer diameter of the flange part is 3.7mm, the thickness of the flange part is 0.5mm, and the diameter of the relay core insertion hole is 1.4mm.

- Nib - Injection-molded polypropylene, the following nib 2 was used: the length 2c in the longitudinal section is 14 mm, the opening at the rear end is elliptical, the short side 2a' is 2.4 mm, and the long side 2b' is 3.2 mm , the opening at the front end is elliptical, the short side 2a is 2.0 mm, the long side 2b is 3.1 mm, the number of spacers 5 is two, the length 5a of the spacer 5 is 2.0 mm, and the thicknesses 5b1 and 5b2 of the spacer 5 are respectively The depth 5c of the spacer 5 is 0.4mm, the depth 5c of the spacer 5 is 2mm, the number of holes in the opening of the front end is 3, the length 2b1 of the holes in the longitudinal direction of the cross section of the opening is 0.75mm, 2b2 is 0.8mm, and 2b3 is 0.75mm. mm, the distance between the centers of the holes is 1.175mm. The hole in the center (hole with length 2b2) has an area of 1.60 mm ² , and the holes on its sides (holes with length 2b1, 2b3) have an area of 1.17 mm ² respectively.

-Relay core- The relay core 4 was used as a molded body having an outer diameter of 2.0 mm, a total length of 35 mm, and a molded body having a monofilament diameter of 5d (denier) and a polyurethane resin with a porosity of 60%.

-Assembly of the nib unit- The nib 3 is inserted from the rear end of the nib 2, and the flange portion of the nib is brought into contact with the nib rear end fixing portion of the nib. Next, the relay core 4 is inserted into the hole at the rear end of the pen point 3 . A 0.1% aqueous solution of PVA was dipped in the tip of the tip of the pen point 3, trimmed, and then dried. During assembly, the tip of the pen can be smoothly inserted without clogging the three holes in the opening at the front end of the nib 2 . Moreover, since the cross-sectional shape of the opening of the rear end of the nib 2 and the nib 3 is a non-circular ellipse, the nib 3 does not rotate or twist in the circumferential direction when inserted.

-Assembly to liquid applicator for evaluation test- The assembled nib unit was installed in a container filled with 0.7 g of cotton wool (monofilament diameter 5d, porosity 90%) of dye ink for eyebrow pencil with viscosity 2.5 cps, specific gravity 1.00, pH 7.4, and obtained The liquid applicator 10 for the evaluation test was evaluated.

-note experiment 1- Using the liquid applicator 10 for the evaluation test, 10 lines of 10 cm were drawn on a biological skin sheet (manufactured by Beaulax Co., Ltd., model P001-001) coated with foundation, and observed with a microscope and visually. The state of the surface of the pen tip 3 of the liquid applicator 10 after writing. The case where no clogging of the foundation was found was made ◯, and the case where clogging was found was made x. Table 1 shows the results of the notebook test. No clogging of the foundation was found on the surface of the pen point 3 of Example 2.

-note experiment 2- Using the liquid applicator 10 for the evaluation test, a plurality of lines were written on paper with a writing load of 1 g, 5 g, and 10 g, and the line width, spacing between lines, unevenness, and ink flow were confirmed. Regarding ink flow, the case where there was no unevenness of the pen line was set to ◯, and the case where there was unevenness of the pen line was set to x. Table 1 shows the results of the notebook test. In Example 2, all pen lines were found to be free from unevenness, and the ink flow was also good. When the load was increased, it was found that the line width became wider and the intervals between the lines became smaller. In addition, it was found that both the line width and the interval can be controlled to be substantially constant.

(comparative example 1) -nib- As a pen tip, three synthetic fiber cores were used as a pen tip, in which the front end portion of a molded article with a porosity of 75% and a molded product with a porosity of 75% bonded with polyurethane resin was used. The synthetic fiber core has an outer diameter of 1.1 mm and an overall length of 30 mm.

- Nib - Injection-molded polypropylene, the following nib 102 was used: the length 102c in the longitudinal section is 14mm, the opening at the rear end is elliptical, the short side 102a is 0.8mm, the long side 102b is 3.1mm, and the front end The opening of the front end is elliptical, the short side 102a is 0.8mm, the long side 102b is 3.1mm, there is no spacer, and there is one hole in the opening of the front end. The area of the opening at the front end was 1.95 mm ² (see FIG. 8 ).

-Assembly of the nib unit- Three synthetic fiber cores are arranged in a row with the front ends arranged, and inserted from the rear end of the nib 102 . A soldering iron at 400° C. was brought into contact with the rear end portion of the synthetic fiber core protruding from the rear end portion of the nib 102 to the rear end side, and three synthetic fiber cores were welded. In the embodiment, the process of contacting the soldering iron is unnecessary and slightly complicated, and the manufacturing cost will also be increased. The space between the nylon fibers of the synthetic fiber core becomes the liquid conduction path, so a relay core is not required.

-Assembly to liquid applicator for evaluation test- The assembled nib unit was installed in a container filled with 0.7 g of cotton wool (monofilament diameter 5d, porosity 90%) of dye ink for eyebrow pencil with viscosity 2.5 cps, specific gravity 1.00, pH 7.4, and obtained Liquid applicator for evaluation test.

-note experiment 1- Using a liquid applicator for the evaluation test, 10 lines of 10 cm were written on a biological skin sheet coated with a foundation (manufactured by Beaulax Co., Ltd., model P001-001), and the notes were observed with a microscope and visually. After the state of the surface of the front end portion of the synthetic fiber core of the liquid application tool. The case where no clogging of the foundation was found was made ◯, and the case where clogging was found was made x. Table 1 shows the results of the notebook test. Foundation clogging was found on the surface of the synthetic fiber core of Comparative Example 1. Furthermore, it was found that when the particles causing the clogging of the foundation were wiped off, the particles further penetrated into the synthetic fiber core.

-note experiment 2- Using a liquid applicator for the evaluation test, a plurality of lines were written on paper with a writing load of 1 g, 5 g, and 10 g, and the line width, spacing between lines, unevenness, and ink flow were confirmed. Regarding ink flow, the case where there was no unevenness of the pen line was set to ◯, and the case where there was unevenness of the pen line was set to x. Table 1 shows the results of the notebook test. In Comparative Example 1, all pen lines were found to be free from unevenness, and ink flow was good. However, compared with Example 1 and Example 2, it was found that even if the load is increased, the line width does not increase much, and conversely, even if the load is decreased, thin lines cannot be drawn. Specifically, it was found that the average line width at a load of 1g was 0.575mm, 0.605mm at 5g, and 0.72mm at 10g. Based on the load of 1g, it was only about 1.1 times that at 5g, and only about 1.1 times at 10g. 1.25 times. That is, in Comparative Example 1, it was found difficult to control and draw lines of various thicknesses.

(comparative example 2) -nib- Bundle monofilaments made of PBT (polybutylene terephthalate) with a diameter of 0.15mm tapered at the tip, using a root diameter of 2.9mm, a total length of 21.5mm, and a flange outer diameter of 3.7mm. , The thickness of the flange part is 0.5mm, and the diameter of the relay core insertion hole is 1.4mm.

- Nib - Injection-molded polypropylene, the length in the longitudinal section is 14 mm, the opening at the rear end is circular and the inner diameter is 3.2 mm, and the opening at the front end is circular and the inner diameter is 2.0 mm. mm, the area of the opening at the front end is 3.14mm ² of the nib 202 (see Figure 9).

-Relay core- The relay core is a molded body with an outer diameter of 2.0mm, a total length of 35mm, and a molded body with a porosity of 60% made of polyester fibers with a monofilament diameter of 5d (denier) and polyurethane resin.

-Assembly of the nib unit- The nib is inserted from the rear end of the nib 202, and the flange portion of the nib is brought into contact with the nib rear end fixing portion of the nib. Next, insert the relay core into the hole at the rear end of the pen tip. The tip of the tip of the nib is dipped in a 0.1% PVA aqueous solution, trimmed and then dried. When assembling, since the opening at the front end of the nib 202 is not divided by a partition and there is only one nib, it can be inserted smoothly.

-Assembly to liquid applicator for evaluation test- The assembled nib unit was installed in a container filled with 0.7 g of cotton wool (monofilament diameter 5d, porosity 90%) of dye ink for eyebrow pencil with viscosity 2.5 cps, specific gravity 1.00, pH 7.4, and obtained Liquid applicator for evaluation test.

-note experiment 1- Using a liquid applicator for the evaluation test, 10 lines of 10 cm were written on a biological skin sheet coated with a foundation (manufactured by Beaulax Co., Ltd., model P001-001), and the notes were observed with a microscope and visually. After the state of the surface of the pen tip of the liquid application tool. The case where no clogging of the foundation was found was made ◯, and the case where clogging was found was made x. Table 1 shows the results of the notebook test. No clogging of the foundation was found on the surface of the pen point of Comparative Example 2.

-note experiment 2- Using a liquid applicator for the evaluation test, a plurality of lines were written on paper with a writing load of 1 g, 5 g, and 10 g, and the line width, spacing between lines, unevenness, and ink flow were confirmed. Regarding ink flow, the case where there was no unevenness of the pen line was set to ◯, and the case where there was unevenness of the pen line was set to x. Table 1 shows the results of the notebook test. In Comparative Example 2, all pen lines were found to be free from unevenness, and the ink flow was also good. Compared with Example 1 and Example 2, it was found that when the load was increased, the line width increased rapidly. However, since there is only one pen tip and there are no forks, it is necessary to apply one by one, and it is not possible to draw three lines at a time. In addition, it was found that it was difficult to control the intervals between the lines to be substantially constant because the lines were coated one by one.

(comparative example 3) -nib- Bundle PBT (polybutylene terephthalate) monofilaments with a diameter of 0.15mm tapered at the tip, using three pieces with a root diameter of 1.5mm, a total length of 30.0mm, and a flange with an outer diameter of 2.2mm nib with a flange thickness of 0.3mm.

-Nips- Similar to Example 1, the nibs 2 were used. That is, the injection-molded polypropylene used the following nib 2: the length 2c in the longitudinal section is 14 mm, the opening at the rear end is circular and the inner diameters 2a', 2b' are 3.2 mm, and the opening at the front end is The part is elliptical, the long side 2b is 3.1mm, the short side is 2.0mm, the number of spacers 5 is two, the length 5a of the spacer 5 is 2.0mm, and the thicknesses 5b1 and 5b2 of the spacer 5 are 0.4mm respectively. The depth 5c of 5 is 2 mm, the number of holes in the opening of the front end is 3, the length 2b1 of the holes in the longitudinal direction of the cross section of the opening is 0.75 mm, 2b2 is 0.8 mm, and 2b3 is 0.75 mm. The distance is 1.175mm. The hole in the center (hole with length 2b2) has an area of 1.60 mm ² , and the holes on its sides (holes with length 2b1, 2b3) have an area of 1.17 mm ² respectively.

-Assembly of the nib unit- The three nibs are inserted from the rear end of the nib 2, and the nibs are inserted into the three holes of the opening at the front end of the nib 2, respectively. The tip of the tip of the nib is dipped in a 0.1% PVA aqueous solution, trimmed and then dried. Since the root diameter of the nib is too small, the relay core cannot be inserted. Therefore, the rear end portion of the nib is configured to protrude further to the rear end side than the rear end portion of the nib 2 . When assembling, it is necessary to insert three nibs with a horizontal outer diameter of 1 mm to 2 mm into the holes with a width of less than 1 mm, and among the nibs that cannot be welded, it is necessary to assemble the front end of the nib so that it does not deviate. High difficulty. In addition, the manufacturing cost of the nib itself, which is made by bundling PBT (polybutylene terephthalate) monofilaments, is also high, and three pieces need to be prepared, so the manufacturing cost as a nib unit also becomes high.

-Assembly to liquid applicator for evaluation test- The assembled nib unit was installed in a container filled with 0.7 g of cotton wool (monofilament diameter 5d, porosity 90%) of dye ink for eyebrow pencil with viscosity 2.5 cps, specific gravity 1.00, pH 7.4, and obtained Liquid applicator for evaluation test.

-note experiment 1- Using a liquid applicator for the evaluation test, 10 lines of 10 cm were written on a biological skin sheet coated with a foundation (manufactured by Beaulax Co., Ltd., model P001-001), and the notes were observed with a microscope and visually. After the state of the surface of the pen tip of the liquid application tool. The case where no clogging of the foundation was found was made ◯, and the case where clogging was found was made x. Table 1 shows the results of the notebook test. No foundation clogging was observed on the surface of the pen point of Comparative Example 3.

-note experiment 2- Using a liquid applicator for the evaluation test, a plurality of lines were written on paper with a writing load of 1 g, 5 g, and 10 g, and the line width, spacing between lines, unevenness, and ink flow were confirmed. Regarding ink flow, the case where there was no unevenness of the pen line was set to ◯, and the case where there was unevenness of the pen line was set to x. Table 1 shows the results of the notebook test. In Comparative Example 3, unevenness was found in all pen lines, and ink flow was poor. It was found that Comparative Example 3 has a structure that does not have an intermediate core, and the liquid needs to be supplied to the pen tip only by the capillary force of the pen tip, and the capillary force is insufficient. It was found that when the load is increased, the line width becomes wider, and the interval between each line tends to be reduced, but the line width and the interval between lines cannot be controlled due to poor ink flow.

【Table 1】

1: Nib unit 2: nib 2a: The length of the short side of the opening at the tip of the nib (inner diameter) 2a': The length of the short side of the opening at the rear end of the nib (inner diameter) 2b: The length of the long side of the opening at the front end of the nib (inner diameter) 2b1, 2b2, 2b3: The length of the hole in the longitudinal direction of the cross section of the opening at the front end of the nib 2b': The length of the long side of the opening at the rear end of the nib (inner diameter) 2c: The length of the nib in the longitudinal section 3: nib 4: relay core 5: Divider 5a: The length of the divider 5b1, 5b2: The thickness of the separator 5c: Depth of the divider 10: Liquid applicator 100: Liquid applicator of conventional example 102: The nib of the conventional example 102a: The length of the short side of the opening at the front end of the nib of the conventional example 102b: The length of the long side of the opening at the front end of the nib of the conventional example 102c: the length of the nib of the conventional example in the longitudinal section 201: The nib unit of the conventional example 202: The nib of the conventional example 301: The nib unit of the conventional example

[ Fig. 1 ] An example of a schematic diagram showing a pen point unit of the present invention. Figure 1(a) is a side view when viewed from the short direction of the opening at the front end of the nib, and Figure 1(b) is a side view when viewed from the long side of the opening at the front end of the nib View, Figure 1 (c) is a perspective view. [ Fig. 2 ] An example of the nib of the present invention is shown. Fig. 2 (a) is a cross-sectional view of the opening of the front end of the nib, and Fig. 2 (b) is a longitudinal sectional view cut along the longitudinal direction in such a way as to pass through the center of the short side of the opening of the front end, FIG. 2( c ) is a longitudinal sectional view cut in the direction of the short side so as to pass through the center of the long side of the opening at the front end, and FIG. 2( d ) is a perspective view. [ Fig. 3 ] An example of the nib of the present invention is shown. Figure 3(a) is a cross-sectional view of the front end of the nib, Figure 3(b) is a cross-sectional view of the rear end of the nib, and Figure 3(c) is a short side through the opening of the front end Fig. 3(d) is a longitudinal sectional view cut along the short side direction so as to pass through the center of the long side of the opening at the front end. [FIG. 4] An example of the manufacturing (assembly) process of the pen point unit of this invention is shown. Figure 4(a) is the process of preparing the nib, nib, and relay core, and Figure 4(b) is after inserting the nib from the rear end of the nib and bifurcating the tip of the nib at a plurality of holes in the nib Manufacturing process, Figure 4(c) is the process of inserting the relay core at the rear end of the nib, and Figure 4(d) is the process of trimming the shape of the pen tip. [ FIG. 5 ] ( a ) shows an example of a longitudinal sectional view of the liquid applicator of the present invention, and FIG. 5( b ) shows an example of a longitudinal sectional view of the pen tip unit of the present invention. [ Fig. 6 ] shows an example of a pen tip unit using a conventional synthetic fiber core. The left side of Fig. 6(a) is assembled with a plurality of synthetic fiber cores, the right side is the front end of one synthetic fiber core made into a fork shape, and Fig. 6(b) is a synthetic fiber used on the surface coated with foundation. Figure 6(c) is an enlarged cross-section of Figure 6(b) for the pen tip when the core is coated. [ Fig. 7 ] shows an example of a liquid applicator using a conventional synthetic fiber core. FIG. 7( a ) is a longitudinal sectional view, and FIG. 7( b ) is a cross-sectional view of the opening at the front end of the nib. [ Fig. 8 ] An example of a conventional nib is shown. Fig. 8 (a) is a cross-sectional view of the opening of the front end of the nib, and Fig. 8 (b) is a longitudinal sectional view cut along the longitudinal direction in a manner passing through the center of the short side of the opening of the front end, FIG. 8( c ) is a longitudinal sectional view cut along the short-side direction so as to pass through the center of the long side of the opening at the front end, and FIG. 8( d ) is a perspective view. [ Fig. 9 ] An example of a nib for a nib unit using a conventional monofilament bundle is shown. Fig. 9(a) is a cross-sectional view of the opening of the front end of the nib, Fig. 9(b) is a side view, and Fig. 9(c) is a longitudinal sectional view. [ Fig. 10 ] An example of an assembly process of a nib for a nib unit using a bundle of monofilaments of a conventional example is shown. Figure 10(a) is the process of preparing the nib, nib, and relay core, Figure 10(b) is the process of inserting the nib from the rear end of the nib, and Figure 10(c) is inserted at the rear end of the nib The manufacturing process of the relay core. [ Fig. 11 ] shows an example of manufacturing (assembling) a pen point unit using a pen point of a plurality of bundled monofilaments of a conventional example. Fig. 11(a) is prepared with a nib and a plurality of nibs, and Fig. 11(b) is assembled with a plurality of nibs from the rear end of the nib.

2: nib

2a: The length (inner diameter) of the short side of the opening at the front end of the nib

2a': the length of the short side of the opening at the rear end of the nib (inner diameter)

2b: The length (inner diameter) of the long side of the opening at the tip of the nib

2b': The length of the long side of the opening at the rear end of the nib (inner diameter)

2c: The length of the nib in the longitudinal section

5: Divider

5a: The length of the divider

5c: Depth of the divider

Claims (12)

A nib unit comprising: 1 nib consisting of a monofilament with a tapered front end; and The nib is provided so as to cover the outer periphery of the tip portion of the nib except for the tip on the tip side, The opening at the front end of the nib is divided by one or more partitions, and a plurality of holes are formed, The aforementioned pen tip of the aforementioned nib is forked along the aforementioned plurality of holes of the aforementioned nib. The nib unit as described in claim 1, further comprising a relay core, The outer periphery of the front end portion of the relay core is covered by the rear end portion of the pen tip. The nib unit as described in Claim 1 or 2, wherein The cross-section of the opening at the front end of the nib is elliptical or rectangular with rounded corners. The nib unit as described in Claim 1 or 2, wherein In the cross-section of the opening, two or more of the separators are directed in the longitudinal direction in parallel, or the number of the separator is one. The nib unit as described in claim 3, wherein In the cross section of the opening, two or more separators are oriented in the longitudinal direction in parallel, and are at right angles to the longitudinal direction of the opening. The nib unit as described in claim 3, wherein In the cross section of the opening, the plurality of holes are arranged in a row with respect to the longitudinal direction of the opening. The nib unit as described in claim 1, wherein The aforementioned separator is integrally formed with the aforementioned nib. The nib unit as described in claim 1, wherein The material of the aforementioned nib is a tapered filament made of polyester or a tapered filament made of nylon. The nib unit as described in claim 2, wherein The material of the aforementioned relay core is nylon fiber, polyester fiber, acrylic fiber or their mixed fibers. A method of manufacturing a nib unit, which is the manufacturing method of the nib unit described in claim 1, comprising: a step of inserting the aforementioned nib from the rear end of the aforementioned nib; and A step of branching the tip of the nib along the plurality of holes in the opening of the nib. The manufacturing method of the nib unit according to claim 10, further comprising the step of inserting the front end of the relay core into the rear end of the nib. A liquid applicator using the pen tip unit described in Claim 1.