JP2022012550A - Writing instrument - Google Patents

Abstract

To provide a writing instrument with high user satisfaction.SOLUTION: The writing instrument P has a first writing function for writing with a first line width d1 and a second writing function for writing with a second line width d2, which is narrower than the first line width d1. The first ink 31 for the first writing function and the second ink 32 for the second writing function have similar colors, and the saturation of the second ink 32 is higher than the saturation of the first ink 31. Alternatively, the first ink 31 for the first writing function and the second ink 32 for the second writing function have similar colors, and the brightness of the second ink 32 is lower than the brightness of the first ink 31.SELECTED DRAWING: Figure 6

Description

The present invention relates to a writing instrument.

Among the writing instruments, there is a so-called multifunctional writing instrument that has a plurality of writing functions by one. Multi-functional writing instruments have the advantage of reducing the number of writing instruments they have, and are widely used mainly by people who often carry writing instruments with them.

As a kind of multifunctional writing tool, there is a writing tool in which pen tips are provided at both ends of a shaft tube, and it is called a double-headed writing tool or the like (Patent Documents 1 to 3). For example, in the writing tool of Patent Document 3, a pen core for thick writing having a rectangular cross section is provided on one end side of the barrel, and a pen core for fine writing having a circular cross section is provided on the other end side. In this writing tool, these two types of pen cores are attached to both ends of a common ink occlusion body, and ink is supplied to each pen core from here so that writing can be performed with each pen core. There is.

With this writing tool, marking can be performed by writing with ink on the characters on the paper surface using a pen core for bold writing with a rectangular cross section. It is also possible to write characters on the paper using a pen core for fine writing with a circular cross section. That is, one writing tool can be used as a marker or a felt-tip pen.

Japanese Unexamined Patent Publication No. 62-1509 Japanese Unexamined Patent Publication No. 2017-13316 Japanese Unexamined Patent Application Publication No. 2003-1368889

Considering the usability when marking is performed using the pen core for thick writing in the writing tool of Patent Document 3, for example (that is, when the writing tool is used as a marker), the visibility of the marked characters is not easily impaired, light blue, etc. Ink with such a color is suitable. However, with ink of such a color, when writing characters or the like using the pen core for fine writing in the writing instrument (that is, when the writing instrument is used as a felt-tip pen), the visibility of the written characters is poor. Become. Poor visibility refers to a state in which written characters cannot be clearly read. Visibility can be improved by making the pen core thicker, but if this is done, fine characters cannot be written and the function as a felt-tip pen for fine characters cannot be fulfilled.

On the contrary, considering the usability when the writing tool of Patent Document 3 is used as a felt-tip pen, an ink having a color such as red, which allows the written characters to be clearly read, is preferable. However, with ink having such a color, the visibility of the marked characters is impaired when the writing tool is used as a marker. That is, the characters on which the ink is superimposed cannot be clearly read.

As described above, in the writing tool disclosed in Patent Document 3, the ease of use when marking is performed using the pen core for thick writing (that is, the ease of use as a marker) and the pen core for fine writing. It was difficult to actually achieve both the ease of use when writing characters using the pen (that is, the ease of use as a felt-tip pen). For this reason, users who seek the usability of both have often possessed a light blue writing tool for use as a marker and a red writing tool for use as a felt-tip pen, and the significance as a multifunctional writing tool is lost. It was rejected. On the other hand, if these two writing tools are used together, the part marked in light blue and the characters written in red will be mixed in the notebook, etc., and the sense of color unity will be lost. There was also the problem that the overall appearance would be poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a writing instrument with a high degree of user satisfaction.

The present invention has taken the following measures in order to achieve such an object.

That is, the first aspect of the present invention is
A writing instrument having a first writing function for writing with a first line width and a second writing function for writing with a second line width narrower than the first line width.
The first ink for the first writing function and the second ink for the second writing function have similar colors.
The saturation of the second ink is higher than the saturation of the first ink.
It is characterized by that.

Further, the second aspect of the present invention is
A writing instrument having a first writing function for writing with a first line width and a second writing function for writing with a second line width narrower than the first line width.
The first ink for the first writing function and the second ink for the second writing function have similar colors.
The brightness of the second ink is lower than the brightness of the first ink.
It is characterized by that.

A color can be defined from the three attributes of "hue", "saturation", and "brightness". In each of the above configurations, "similar color" refers to a color having the same or similar hue. Here, "the hues are close to each other" means that the angle formed by the two hues in the hue circle is 90 degrees or less (particularly preferably 45 degrees or less).

As described above, conventionally, when ink of the same color is supplied to the pen core for thick writing used as a marker or the like and the pen core for fine writing used as a sign pen or the like, the pen core for thick writing is supplied. The visibility of the characters when ink is layered on top of the characters using the pen is impaired, or the characters are written on paper using a pen core for fine writing. It was thought that either the visibility would be reduced or not.

However, the inventor has considered that when ink is layered on a character or the like (typically a black character written on a white paper surface), the character or the like is considered to have a high visibility obstruction (for example, for example). It has been found that the visibility inhibition can be reduced by lowering the saturation even if the color is red (see FIG. 3A). Further, the inventor may use a color (for example, light blue) that is considered to have low legibility when writing a character or the like on a paper surface or the like (typically, a white paper surface). It has been found that the visibility can be improved by increasing the saturation (see FIG. 3 (b)). In other words, regardless of the hue of the color, by adjusting the saturation, it is possible to suppress the visibility obstruction of the characters, etc. when ink is applied over the characters, etc., and the characters, etc. It was found that it is possible to improve the visibility of the characters and the like when writing.

The configuration according to the first aspect is made based on this new finding, and is relatively wide with the first ink for the first writing function for writing with a relatively wide first line width. By making the saturation of the second ink higher than the saturation of the first ink while making the second ink for the second writing function that writes with a narrow second line width a similar color, the first ink becomes While improving the visibility of the superimposed characters and the characters written with the second ink, the part written with the first ink and the part written with the second ink It is possible to give a sense of unity even if it is mixed in the ink. As a result, a writing tool with a high degree of user satisfaction can be obtained.

In addition, the inventor reduces the visibility inhibition by increasing the brightness even if the color is considered to have high visibility inhibition when ink is layered on the characters or the like. We found that we could do it (see FIG. 4 (a)). Further, the inventor has found that even if a color is considered to have low visibility when writing a character or the like, the visibility can be improved by lowering the brightness (Fig.). 4 (b)). In other words, regardless of the hue of the color, by adjusting the brightness, it is possible to reduce the visibility obstruction of the characters when ink is layered on top of the characters, and it is possible to reduce the visibility of the characters. It has been found that it is possible to improve the visibility of the characters and the like when writing.

The configuration according to the second aspect is made based on this new finding, and is relatively wide with the first ink for the first writing function for writing with a relatively wide first line width. The first ink is overlapped by making the lightness of the second ink lower than the lightness of the first ink while making the second ink for the second writing function that writes with a narrow second line width the same color. The part written with the first ink and the part written with the second ink are notes while improving the visibility of the characters written with the second ink and the visibility of the characters written with the second ink. It is possible to give a sense of unity even if it is mixed in such as. As a result, a writing tool with a high degree of user satisfaction can be obtained.

In the writing instrument according to the first aspect,
The brightness of the second ink is higher than the brightness of the first ink.
It is also preferable.

According to this configuration, when writing characters or the like with the second ink, it is possible to write bright characters or the like with visibility.

Further, in the writing tool according to the second aspect,
The saturation of the second ink is higher than the saturation of the first ink.
It is also preferable.

According to this configuration, when writing characters or the like with the second ink, it is possible to write characters or the like that are highly visible and clearly conspicuous.

Alternatively, in the writing tool according to the second aspect,
The saturation of the second ink is lower than the saturation of the first ink.
It is also preferable.

According to this configuration, when writing characters or the like with the second ink, it is possible to write unobtrusive characters or the like that are not noticeable while having visibility.

Preferably, in each of the above writing tools,
The first ink contains a resin pigment.
It is characterized by that.

According to this configuration, a color having a relatively low saturation and a color having a relatively high lightness can be easily expressed.

Preferably, in each of the above writing tools,
The second ink contains a dye.
It is characterized by that.

According to this configuration, any color can be easily expressed.

Preferably, in each of the above writing tools,
The pen tip for the first writing function is provided at one end of the barrel, and the pen tip for the second writing function is provided at the other end of the barrel.
It is characterized by that.

According to this configuration, the first writing function and the second writing function can be incorporated into one writing instrument with a simple configuration.

Preferably, in each of the above writing tools,
A first ink holding unit that holds the first ink,
A second ink holding unit that holds the second ink so as not to come into contact with the first ink,
It is characterized by having.

According to this configuration, it is possible to avoid a situation in which the first ink and the second ink are mixed.

Preferably, in each of the above writing tools,
The holding amount of the first ink in the first ink holding portion is larger than the holding amount of the second ink in the second ink holding portion.
It is characterized by that.

In general usage, the first ink used for writing in the relatively wide first line width is more than the second ink used for writing in the relatively narrow second line width. Since it is considered that the amount of consumption tends to increase, according to this configuration, it is possible to approach the timing when both inks run out, and it is possible to increase the satisfaction of the user.

According to the present invention, it is possible to obtain a writing tool with a high degree of user satisfaction.

The figure which shows the whole structure of the writing instrument which concerns on embodiment of this invention. The figure for demonstrating that the hue is close. The relationship between the visibility inhibition of the characters when ink is layered on top of the characters and the saturation of the ink, and the relationship between the visibility of the characters and the saturation of the ink when the characters are written. Illustration for explaining. Explain the relationship between the visibility obstruction of the characters when ink is layered on the characters and the brightness of the ink, and the relationship between the visibility of the characters and the brightness of the ink when writing the characters. Illustration to do. The figure for demonstrating the relationship between the lightness and saturation of the 1st ink, and the lightness and saturation of a 2nd ink. The figure for demonstrating the mode of use of a writing instrument. The figure for demonstrating the relationship between the lightness and saturation of the 1st ink, and the lightness and saturation of a 2nd ink in a modification.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1. Composition of writing instruments>
The configuration of the writing instrument according to the embodiment will be described with reference to FIG. FIG. 1 is a diagram showing an overall configuration of a writing tool P according to an embodiment. In FIG. 1, for convenience of explanation, a part of the shaft cylinder 10 is shown in cross section.

The writing tool P is a so-called multifunctional writing tool, and has a first writing function for writing with a relatively wide first line width d1 and a second writing function for writing with a relatively narrow second line width d2. (See FIG. 6). The first writing function realizes a usage mode (a usage mode as a so-called marker) in which ink is layered on a character or the like for marking. On the other hand, the second writing function realizes a usage mode for writing characters and the like (a usage mode as a so-called felt-tip pen). That is, the writing tool P according to this embodiment is a multifunctional writing tool having a function as a marker and a function as a felt-tip pen.

The specific value of the first line width d1 is preferably about 2 mm to 10 mm (particularly preferably about 3 mm to 6 mm), and the specific value of the second line width d2 is 0.1 mm to 1 About 5.5 mm (particularly preferably about 0.2 mm to 0.6 mm) is suitable.

As shown in FIG. 1, the writing instrument P has a so-called double-headed writing instrument in which pen tips 11 and 12 are provided at both ends of the barrel 10. Although not shown, each of the two nibs 11 and 12 is provided with a removable cap for covering the nibs 11 and 12 when not in use.

The pen tip (first pen tip) 11 provided at one end of the barrel 10 is a pen tip for the first writing function, and is suitable for writing with a relatively wide first line width d1. It is said to have a unique shape. Specifically, for example, in the first pen tip 11, the tip portion of the cylinder is cut out along a facing surface that is inclined in the opposite direction to the central axis, and the tip edge 11a is a surface orthogonal to the central axis. The shape is inclined with respect to the (so-called chisel shape). The width d11a of the tip edge 11a is, for example, about 3 mm to 6 mm. By using such a first pen tip 11, it is possible to write a line as wide as the width d11a of the tip edge 11a. That is, by appropriately adjusting the width d11a, a pen tip capable of writing a line having a relatively wide first line width d1 can be obtained (FIG. 6A).

The pen tip (second pen tip) 12 provided at the other end of the barrel 10 is a pen tip for the second writing function, and is used for writing with a relatively narrow second line width d2. It has a suitable shape and has a shape different from that of the first pen tip 11. Specifically, for example, the second pen tip 12 has a portion (diameter-reduced portion) 12a formed into a substantially conical shape that shrinks in diameter toward the tip, and a cylindrical column extending from the end on the reduced-diameter side. It is configured to include a portion (cylindrical portion) 12b. By using such a second pen tip 12, it is possible to write a narrow line having a diameter d12b at the tip of the cylindrical portion 12b or less. For example, by setting the diameter d12b at the tip of the cylindrical portion 12b to about 0.4 mm to 1.5 mm, it is possible to write a line with a line width of about 0.2 mm to 0.6 mm. That is, by appropriately adjusting the diameter d12b, a pen tip capable of writing a line having a second line width d2, which is relatively narrow, can be obtained (FIG. 6B, etc.). The cross-sectional diameter of the cylindrical portion 12b is substantially constant over the entire axial direction, and the diameter of the tip (and thus the line width of the line to be written) does not easily change even if the tip is worn. ing.

Specifically, the first pen tip 11 and the second pen tip 12 communicate with, for example, a resin processed body of fibers, a fiber processed body in which pore gaps are formed, a fused processed body of heat-meltable fibers, a felt body, and the like. It can be formed from a porous member having pores, a plastic core having ink grooves formed in the axial direction of the plastic material, a sintered core (porous body) obtained by sintering various plastic powders, and the like. Needless to say, the forming materials of the first pen tip 11 and the second pen tip 12 may be the same as each other or may be different from each other.

The shaft cylinder 10 is a cylindrical member, and two ink holding portions 21 and 22 are housed inside the cylinder. The first pen tip 11 is connected to one ink holding portion (first ink holding portion) 21, and the ink for the first writing function (first ink) 31 is connected to the first ink holding portion 21. Is retained. Further, a second pen tip 12 is connected to the other ink holding portion (second ink holding portion) 22, and the ink for the second writing function (second ink) is connected to the second ink holding portion 22. ) 32 is retained.

Here, a structure (so-called batting type) is adopted in which the inks 31 and 32 are impregnated into the batting and held. That is, each ink holding portion 21 and 22 is composed of a storage body impregnated with each ink 31, 32, and the inks 31 and 32 impregnated in each ink holding portion 21 and 22 are pen tips 11 due to the capillary phenomenon. By transmitting to, 12, it is possible to write with each pen tip 11 and 12.

The first ink holding portion 21 and the second ink holding portion 22 are provided apart from each other so that the inks 31 and 32 held therein do not come into contact with each other. As a result, the first ink 32 and the second ink 32 are prevented from being mixed. As shown, a partition 20 may be provided between the first ink holding portion 21 and the second ink holding portion 22. That is, the inside of the shaft cylinder 10 may be divided into two spaces by a partition 20, and the ink holding portions 21 and 22 may be accommodated in each of the divided spaces.

Further, the volume of the first ink holding unit 21 is larger than the volume of the second ink holding unit 22, and the holding amount of the first ink 31 in the first ink holding unit 21 is the second ink holding unit. It is said that the amount is larger than the holding amount of the second ink 32 in 22. Since the first ink 31 is used for writing in the relatively wide first line width d1, it consumes more than the second ink 32 used for writing in the relatively narrow second line width d2. Where the amount tends to be large, by setting the holding amount of the first ink 31 to be larger than the holding amount of the second ink 32, it is possible to approach the timing when both inks 31 and 32 run out.

Both the first ink 31 and the second ink 32 are obtained by melting a colorant in an aqueous solvent (for example, water). Any color can be expressed by adjusting the color combination of the colorants, the concentration of the colorants of each combined color, the mixing ratio of the colorants of each combined color, and the like. That is, any combination of hue, any lightness, and any saturation can be expressed.

In the first ink 31, a resin pigment is used as a colorant. That is, the first ink 31 is assumed to contain a resin pigment. The resin pigment is good at expressing pale colors such as relatively low saturation and relatively high lightness, and is suitable for expressing the color C1 (described later) of the first ink 31.

On the other hand, in the second ink 32, a dye is used as a colorant. That is, the second ink 32 contains a dye. Dyes can express a wide range of colors, including dark colors such as relatively high saturation and relatively low lightness, and have good color development. Therefore, it is suitable for expressing the color C2 (described later) of the second ink 32.

In the writing tool P having the above configuration, the width is relatively widened by the first pen tip 11, the first ink holding portion 21 connected to the first pen tip 11, the first ink 31 held by the first pen tip 11, and the shaft cylinder 10. The first writing function of writing with a wide first line width d1 is realized. That is, in the writing instrument P, the first ink 31 is supplied to the first pen tip 11, and the user hits the entire width direction of the tip edge 11a of the first pen tip 11 on a paper surface or the like. By writing while touching, it is possible to draw a line with a thick line width d1 corresponding to the width d11a of the tip edge 11a. Marking can be performed by stacking 1 ink 31 (FIG. 6 (a)).

Further, in the writing tool P, the width is relatively narrow due to the second pen tip 12, the second ink holding portion 22 connected to the second pen tip 12, the second ink 32 held by the second pen tip 12, and the barrel 10. The second writing function of writing with the line width d2 is realized. That is, in the writing instrument P, the second ink 32 is supplied to the second pen tip 12, and the user keeps the tip of the cylindrical portion 12b of the second pen tip 12 in contact with the paper surface or the like. By writing, a line with a thin line width d2 corresponding to the diameter d12a of the tip can be drawn, and for example, fine characters can be written on the paper surface with the second ink 32 (FIG. 6 (b)). Such).

<2. Ink color>
The color of the first ink 31 (first ink color) C1 and the color of the second ink 32 (second ink color) C2 will be described with reference to FIGS. 2 to 5.

<2-1. Hue>
The first ink color C1 and the second ink color C2 are similar colors. A color can be defined from, for example, three attributes of hue, saturation, and lightness, and the term "similar color" as used herein refers to a color having the same or similar hue.

Further, "the hues are close to each other" here means that the angle formed by the two hues in the hue circle is 90 degrees or less (particularly preferably 45 degrees or less). That is, as shown in FIG. 2, the hue circle HC has hues arranged in an annular shape, and hues that continuously change in red, orange, yellow, green, blue, and purple are arranged along the circumferential direction. It is arranged. In this hue circle HC, when the angle θ formed by the two hues H1 and H2 from the center of the hue circle HC is 90 degrees or less (particularly preferably 45 degrees or less), both hues H1 and H2 are Defined as "approximate".

<2-2. Saturation and brightness>
As described above, color is defined by the attributes of saturation and lightness in addition to hue. That is, even if the hue is the same, if at least one of the saturation and the lightness is different, the colors will be different.

The inventor paid attention to the relationship between the visibility obstruction of characters and the like when ink is layered on the characters and the saturation of the ink. As a result, as schematically shown in FIG. 3A, the higher the saturation (that is, as the vividness increases), the higher the visibility inhibition, and the lower the saturation, the more the visibility inhibition. Found to decline. Furthermore, it was found that any hue has the same tendency.

The inventor also paid attention to the relationship between the legibility of characters and the like when writing characters on paper and the saturation of ink. As a result, as schematically shown in FIG. 3B, it was found that the higher the saturation, the higher the visibility, and the lower the saturation, the lower the visibility. Furthermore, it was found that any hue has the same tendency. In addition, in FIG. 3 and each figure referred to later, the saturation is expressed by the thickness of the line, but it goes without saying that this is for convenience of illustration.

Furthermore, the inventor also paid attention to the relationship between the visibility obstruction of the characters and the like when the ink is layered on the characters and the brightness of the ink. As a result, as schematically shown in FIG. 4 (a), the lower the lightness (that is, the closer to black), the higher the visual impairment, and the higher the lightness (that is, the closer to white). It has been found that the visual impairment is reduced. Furthermore, it was found that any hue has the same tendency.

The inventor also paid attention to the relationship between the legibility of characters and the like when writing characters on paper and the lightness of the ink. As a result, as schematically shown in FIG. 4B, it was found that the lower the brightness, the higher the visibility, and the higher the brightness, the lower the visibility. Furthermore, it was found that any hue has the same tendency. In FIG. 4 and each figure referred to later, the brightness is expressed by the density of lines, but it goes without saying that this is for convenience of illustration.

A mode of defining the brightness and saturation of the first ink color C1 and the second ink color C2 based on such new findings will be described below.

The lightness and saturation of the first ink color C1 and the lightness and saturation of the second ink color C2 are assumed to form a predetermined relative relationship between them. In the following, in order to make the explanation easy to understand, first, the lightness and saturation of the first ink color C1 are determined, and the lightness of the second ink color C2 is formed so as to form a predetermined relative relationship with them. And, it is assumed that the saturation is determined. Needless to say, the brightness and saturation of the second ink color C2 are determined first, and the first ink color is formed so as to form a predetermined relative relationship with the brightness. The lightness and saturation of C1 may be determined. Further, the lightness and saturation of the first ink color C1 and the lightness and saturation of the second ink color C2 are adjusted in parallel, and each converges to a value such that a predetermined relative relationship is finally formed. May be done.

Here, first, the brightness and saturation of the first ink color C1 are determined. As described above, the visual impairment of the characters and the like when ink is layered on the characters and the like depends on the saturation and the lightness. Here, the lightness and the saturation of the first ink color C1 are the characters and the like. The combination is such that the visual impairment of the characters and the like when the first ink 31 is overlapped from above is sufficiently low. As described above, the lower the saturation, the lower the visual impairment. Therefore, when the saturation is set to be relatively low, a relatively low brightness can be selected. Further, the higher the lightness, the lower the visual impairment, so that when the lightness is set to be relatively high, a relatively high saturation can be selected. The range of lightness and saturation that can be selected also depends on the selected hue.

Subsequently, the lightness and saturation of the second ink color C2 are determined. The lightness and saturation of the second ink color C2 are such that a predetermined relative relationship is formed with the lightness and saturation of the first ink color C1. That is, the vertical axis defines the plane coordinates representing the saturation and the horizontal axis represents the lightness (FIG. 5), and the previously determined combination of the lightness and the saturation of the first ink color C1 is set at the origin of the plane coordinates. At that time, the combination of the lightness and the saturation of the second ink color C2 is selected from the coordinate values in the second quadrant Q2 or the third quadrant Q3.

Comparing the case where the combination of the lightness and the saturation of the second ink color C2 is the coordinate value in the second quadrant Q2 and the case where the coordinate value is in the third quadrant Q3, the former is the second ink. The saturation of the color C2 tends to be relatively high (vivid), and the latter tends to have a relatively low saturation of the second ink color C2. Therefore, in the following, the former will be referred to as "high saturation type Q2" and the latter will be referred to as "low saturation type Q3".

(High saturation type Q2)
As described above, as the brightness decreases, the visibility of the characters and the like when writing the characters increases. In the high saturation type Q2, the brightness of the second ink color C2 is higher than the brightness of the first ink color C1. Is also considered low. Therefore, when a character or the like is written with the second ink 32, the visibility of the character or the like can be made high.

Further, as described above, as the saturation increases, the visibility of the character or the like when writing the character or the like increases. In the high saturation type Q2, the saturation of the second ink color C2 is the first ink color. It is considered to be higher than the saturation of C1. Therefore, when a character or the like is written with the second ink 32, the visibility of the character or the like can be sufficiently high.

That is, the lightness of the second ink color C2 is lower than the lightness of the first ink color C1, and the saturation of the second ink color C2 is higher than the saturation of the first ink color C1. While the visibility of the characters and the like when writing the characters and the like with the second ink 32 is high, the visibility obstruction of the characters and the like when the first ink 31 is overlapped on the characters and the like is low. (That is, the visibility of the characters on which the first ink 31 is overlapped is made high).

Further, as the saturation increases, the vividness of the color increases. Therefore, in the high saturation type Q2, when the character or the like is written with the second ink 32, the character or the like is written vividly. Such a function is useful in a usage situation where, for example, a character that stands out more clearly than a character written with a pencil or a mechanical pencil is desired to be written.

(Low saturation type Q3)
As described above, as the brightness decreases, the visibility of the characters and the like when writing the characters increases. In the low saturation type Q3, the brightness of the second ink color C2 is the same as that of the first ink color C1. It is considered to be lower than the brightness. Therefore, when a character or the like is written with the second ink 32, the visibility of the character or the like can be made high.

That is, the brightness of the second ink color C2 is lower than the brightness of the first ink color C1, so that the visibility of the characters and the like when writing the characters and the like with the second ink 32 is high. , It is possible to reduce the visibility obstruction of the characters and the like when the first ink 31 is overlapped on the characters and the like.

Further, as described above, as the saturation becomes higher, the visibility of the character or the like when writing the character or the like increases, but in the low saturation type Q3, the saturation of the second ink color C2 is intentionally increased. It is assumed that the saturation is lower than that of the first ink color C1. As the saturation decreases, the vividness of the color decreases. Therefore, in the low-saturation type Q3, when writing a character or the like with the second ink 32, the character or the like is a color whose vividness is suppressed. Written. Such a function is useful in situations where you want to write conservative characters (that is, characters that are less noticeable than necessary), while being distinguishable from characters written with a pencil or mechanical pencil, for example. Is.

If the saturation of the second ink color C2 is low, the visibility of the characters and the like when writing the characters and the like with the second ink 32 is lowered, but this should be supplemented by adjusting the brightness. Can be done. That is, in the low saturation type Q3, the visibility of the characters and the like when the characters and the like are written with the second ink 32 is ensured by adjusting the brightness of the second ink color C2.

<3. Mode of use>
Next, an embodiment of the writing tool P will be described by taking a lesson note as an example.

The teacher advances the lesson while writing on the board, and the student copies the contents of the board into a notebook using a pencil or mechanical pencil. In this, teachers often emphasize specific parts of the board by saying, "This part is important", "Remember this part", and so on. In this case, the student taking notes can mark the part by writing with the first pen tip 11 of the writing tool P so as to overlap the ink on the pointed out part (FIG. 6 (FIG. 6). a)). As described above, the first ink 31 supplied to the first pen tip 11 has a color C1 in which the legibility of the characters is not easily impaired even if the ink 31 is superimposed on the characters or the like. Therefore, the characters on which the ink is superimposed (that is, the marked characters) can be clearly read.

In addition, teachers sometimes comment on the emphasized part, such as "This part goes to the test", and many students want to write down this comment in a notebook. In such a situation, the student may write the teacher's comment using the second pen tip 12 of the writing instrument P (FIG. 6 (b)). As described above, the second ink 32 supplied to the second pen tip 12 is a color C2 having high visibility such as characters written by the second ink 32. Therefore, it is possible to write clearly readable characters.

Especially in such situations, students want to write letters more clearly than they are written with a pencil or mechanical pencil. In this respect, the second ink 32 of the high saturation type Q2 is suitable. That is, if the second ink 32 of the high saturation type Q2 has high saturation, it is possible to write vivid characters, and the characters are clearly more conspicuous than the characters written with a pencil or mechanical pencil. Can be written.

In addition, teachers often insert supplementary explanations (for example, bean knowledge explained as "By the way ...", stories for developing lessons, etc.) between the explanations that are the main points of the lesson. Many students want to write down these supplementary explanations, which are not written on the board, in their notebooks. In such a situation, the student may write down this supplementary explanation using the second pen tip 12 of the writing tool P (FIG. 6 (c)). As described above, the second ink 32 supplied to the second pen tip 12 is a color C2 having high visibility such as characters written by the second ink 32. Therefore, it is possible to write clearly readable characters.

Especially in such situations, students want to write in unobtrusive, unobtrusive letters that are distinguishable from those written with a pencil or mechanical pencil. In this respect, the second ink 32 of the low saturation type Q3 is suitable. That is, with the second ink 32 of the low saturation type Q3, since the saturation is low, it is possible to write characters in a color with suppressed vividness, and it is possible to write characters that are modest and inconspicuous. .. Further, no matter how vivid the color is suppressed, the portion written with the second ink 32 and the portion written with a pencil or a mechanical pencil can be easily distinguished. Therefore, for example, in the above case, when looking back at the notebook later, it is possible to clearly distinguish between the part that was copied from the board and the part that was not written as a board but was supplemented and added by oneself. can.

When the notes are taken in this way, the notes are written with characters written with a pencil or mechanical pencil, the part marked with the first ink 31, and the second ink 32. Although the characters and the like appear in a mixture, the first ink 31 and the second ink 32 have similar colors (same color system), so there is a sense of unity when viewed as a whole, and the impression is disjointed. It is hard to give and looks good. Further, it is also possible to provide interlocking between the portion marked using the first ink 31 and the characters written using the second ink 32.

Further, when marking is made using the first ink 31 on the characters written using the second ink 32, two colors that are similar colors but have at least one of lightness and saturation different from each other. However, they will overlap. This makes it possible to create an eye-catching expression while creating a unified, harmonious and soft impression. In other words, new expressions that were not possible with existing writing tools are possible. In particular, here, since the resin pigment is used as the colorant of the first ink 31 and the dye is used as the colorant of the second ink 32, the first ink 31 is written from above the characters written using the second ink 32. Even if marking is made using the above, it is difficult for both inks 31 and 32 to be mixed. Therefore, the written characters are less likely to blur.

<4. Effect>
The writing instrument P according to the above embodiment includes a first writing function for writing with a first line width d1 and a second writing function for writing with a second line width d2 narrower than the first line width d1. .. The first ink 31 for the first writing function and the second ink 32 for the second writing function have similar colors, and the saturation of the second ink 32 is higher than the saturation of the first ink 31. High (high saturation type Q2). Alternatively, the first ink 31 and the second ink 32 have similar colors, and the lightness of the second ink 32 is lower than the lightness of the first ink 31 (high saturation type Q2, low saturation type Q3). In any of the configurations, the visibility of the characters and the like on which the first ink 31 is overlapped and the visibility of the characters and the like written by the second ink 32 are both good (that is, usability as a marker). (While achieving both usability as a felt-tip pen), it is possible to give a sense of unity even if the part written with the first ink 31 and the part written with the second ink 32 are mixed in a notebook or the like. .. As a result, a writing tool with a high degree of user satisfaction can be obtained.

Further, in the writing tool P according to the above embodiment, the brightness of the second ink 32 is lower than the brightness of the first ink 31, and the saturation of the second ink 32 is higher than the saturation of the first ink 31. High (high saturation type Q2). According to this configuration, when writing characters or the like with the second ink 32, it is possible to write characters or the like that are highly visible and clearly conspicuous.

Alternatively, in the writing tool P according to the above embodiment, the brightness of the second ink 32 is lower than the brightness of the first ink 31, and the saturation of the second ink 32 is higher than the saturation of the first ink 31. Low (low saturation type Q3). According to this configuration, when characters or the like are written and used with the second ink 32, it is possible to write unobtrusive characters or the like that are not noticeable while having visibility.

Further, in the writing instrument P according to the above embodiment, the first ink 31 contains a resin pigment. According to this configuration, a color having a relatively low saturation and a color having a relatively high lightness can be easily expressed.

Further, in the writing tool P according to the above embodiment, the second ink 32 contains a dye. According to this configuration, any color can be easily expressed.

Further, in the writing instrument P according to the above embodiment, a resin pigment is used as the colorant of the first ink 31, and a dye is used as the colorant of the second ink 32. According to this configuration, even if the writing by both inks 31 and 32 overlaps, it is difficult for both inks 31 and 32 to mix with each other. Therefore, for example, even if marking is made using the first ink 31 from above the characters written using the second ink 32, the written characters are less likely to blur.

Further, in the writing tool P according to the above embodiment, a pen tip (first pen tip) 11 for the first writing function is provided at one end of the barrel 10, and a pen tip for the second writing function (second pen tip) is provided. ) 12 is provided at the other end of the barrel 10. According to this configuration, the first writing function and the second writing function can be incorporated into one writing instrument with a simple configuration.

Further, the writing tool P according to the above embodiment includes a first ink holding unit 21 that holds the first ink 31, and a second ink holding unit 22 that holds the second ink 32 so as not to come into contact with the first ink 31. , Equipped with. According to this configuration, it is possible to avoid a situation in which the first ink 31 and the second ink 32 are mixed.

Further, in the writing tool P according to the above embodiment, the holding amount of the first ink 31 in the first ink holding unit 21 is larger than the holding amount of the second ink 32 in the second ink holding unit 22. In a general usage mode, the first ink 31 used for writing in the relatively wide first line width d1 is used for writing in the relatively narrow second line width d2. Since it is considered that the consumption amount tends to be larger than that of the ink 32, according to this configuration, it is possible to approach the timing when both inks 31 and 32 are exhausted, and the user's satisfaction can be enhanced.

<5. Modification example>
In the above embodiment, when the combination of the lightness and the saturation of the first ink color C1 is placed at the origin of the plane coordinates where the vertical axis represents the saturation and the horizontal axis represents the lightness, the lightness of the second ink color C2 and The combination of saturation was selected from the coordinate values in the second quadrant Q2 or the third quadrant Q3, but as shown in FIG. 7, the lightness and saturation of the second ink color C2 The combination of may be selected from the coordinate values in the first quadrant Q1. That is, the saturation of the second ink 32 may be higher than the saturation of the first ink 31, and the brightness of the second ink 32 may be higher than the brightness of the first ink 31.

In this case, the saturation of the second ink color C2 is higher than the saturation of the first ink color C1, so that the visibility of the characters and the like when writing the characters and the like with the second ink 32 is high. Can be. That is, the saturation of the second ink color C2 is higher than the saturation of the first ink color C1, so that the visibility of the characters and the like when writing the characters and the like with the second ink 32 is high. However, it is possible to reduce the visibility obstruction of the characters and the like when the first ink 31 is overlapped on the characters and the like.

Further, in this case, since the brightness of the second ink color C2 is higher than the brightness of the first ink color C1, when writing characters or the like with the second ink 32, bright characters or the like are written. Can be done. If the lightness of the second ink color C2 is high, the visibility of the characters or the like when writing the characters or the like with the second ink 32 is lowered, but this should be supplemented by adjusting the saturation. Can be done. That is, the legibility of the characters and the like when the characters and the like are written with the second ink 32 is ensured by adjusting the saturation of the second ink color C2.

As described above, the saturation of the second ink 32 is higher than the saturation of the first ink 31, and the brightness of the second ink 32 is higher than the brightness of the first ink 31. When writing characters or the like with the second ink 32, it is possible to write bright characters or the like with visibility.

Alternatively, when the combination of the lightness and the saturation of the first ink color C1 is placed at the origin of the plane coordinates where the vertical axis represents the saturation and the horizontal axis represents the lightness, the combination of the lightness and the saturation of the second ink color C2. Is selected from the coordinate values on the axis R1 between the first quadrant Q1 and the second quadrant Q2, or the coordinate values on the axis R2 between the second quadrant Q2 and the third quadrant Q3. May be good. That is, the lightness may be the same but only the saturation is different (the second ink color C2 is higher), or the saturation is the same but only the lightness is different (the second ink). Color C2 may be lower).

In the former case, the saturation of the second ink color C2 is higher than the saturation of the first ink color C1, and in the latter case, the brightness of the second ink color C2 is lower than the brightness of the first ink color C1. Will be. Therefore, in either case, the visibility of the characters or the like when the characters or the like are written with the second ink 32 can be made high. That is, in each case, the visibility of the characters and the like when the characters and the like are written with the second ink 32 is high, and the visibility of the characters and the like when the first ink 31 is overlapped on the characters and the like. Inhibition can be reduced.

In the above embodiment, the resin pigment is used as the colorant of the first ink 31, but this is not an essential requirement. For example, as the colorant of the first ink 31, a pigment other than the resin pigment or a dye may be used. In addition, various additives such as thickeners may be added.

In the above embodiment, the dye is used as the colorant of the second ink 32, but this is not an essential requirement. For example, as the colorant of the second ink 32, a resin pigment or a pigment other than the resin pigment may be used. In addition, various additives such as thickeners may be added.

In the above embodiment, the first ink 31 and the second ink 32 are assumed to have the colorant melted in an aqueous solvent, but the solvent for melting the colorant does not necessarily have to be water-based, for example, oil-based. There may be.

In the above embodiment, the volume of the first ink holding unit 21 is larger than the volume of the second ink holding unit 22, and the holding amount of the first ink 31 in the first ink holding unit 21 is the first. Although it was supposed to be larger than the holding amount of the second ink 32 in the two ink holding portions 22, even if the volumes of the ink holding portions 21 and 22 (and by extension, the holding amounts of the inks 31 and 32) are the same. good.

In the above embodiment, the writing tool P is a so-called double-headed writing tool in which pen tips 11 and 12 are provided at both ends of the barrel 10, but the form of the writing tool P is not limited to this. For example, the first pen tip 11 and the second pen tip 12 are configured to selectively appear and disappear from one end of the barrel 10 in response to a knock operation by the user. May be good.

In the above embodiment, the writing tool P includes a first pen tip 11 for realizing the first writing function, a first ink holding portion 21 connected to the first pen tip 11, and a second pen tip for realizing the second writing function. A set of 12 and a second ink holding portion 22 connected thereto are provided, but the number of pen tips 11, 12 and the like is not limited to this.

For example, the writing instrument includes a set of a first pen tip 11 for realizing the first writing function and a first ink holding portion 21 connected to the first pen tip 11, and a second pen tip 12 for realizing the second writing function. And two sets of second ink holding portions 22 connected to the second ink holding portion 22 may be provided. Further, in such a configuration, the first ink holding portion 21 holds the first ink 31, and the second ink holding portion 22 holds the second ink 32 of the high saturation type Q2 having the same color as the first ink 31. The second ink holding portion 22 may hold the second ink 32 of the low saturation type Q3 having a color similar to that of the first ink 31.

Further, for example, the writing instrument includes two sets of a first pen tip 11 for realizing the first writing function and a first ink holding portion 21 connected to the first pen tip 11, and a second pen tip for realizing the second writing function. 12 and two sets of second ink holding portions 22 connected to the 12 may be provided. In this case, one first ink holding unit 21 and one second ink holding unit 22 hold the first ink 31 and the second ink 32, which are the first similar colors, respectively, and the other first ink holding unit. 21 and the other second ink holding portion 22 may hold the first ink 31 and the second ink 32, which are the second similar colors, respectively.

The shapes of the pen tips 11 and 12 in the above embodiments may be appropriately changed. For example, the first pen tip 11 may have a shape in which the tip portion of the cylinder is cut out along a facing surface that is inclined in the opposite direction to the central axis, and the tip edge is orthogonal to the central axis. Further, for example, the cross section may be a flat columnar shape, and the tip portion may have a shape cut diagonally with respect to a plane orthogonal to the central axis. Further, for example, the cross section may be a flat columnar shape, and the tip portion may have a shape orthogonal to the central axis.

In the above embodiment, the so-called batting method in which the inks 31 and 32 are impregnated into the batting and held is adopted, but the structure in which the inks 31 and 32 are filled and held in the ink tank (so-called direct) is adopted. Liquid type) may be adopted. That is, each ink holding portion may be configured by an ink tank. In this case, it is preferable that each ink tank is provided so that at least each internal space (ink storage space) is separated and independent so that the inks 31 and 32 stored in each do not come into contact with each other. Further, in this case, the capacity of the ink tank filled with the first ink 31 may be larger than the capacity of the ink tank filled with the second ink 32. In this case, as a method of supplying the inks 31 and 32 in each ink tank to the pen tips 11 and 12, various existing methods such as a so-called bulb type and bellows type can be adopted. ..

In the writing instrument P according to the above embodiment, the specific embodiment of the first writing function and the second writing function is not limited to those described above.

For example, the first writing function may be realized by a so-called transfer roller. Specifically, for example, a first including a pen tip having a structure in which a columnar roller is pivotally supported so as to be able to rotate around an axis, and a mechanism for supplying the first ink 31 to the surface of the roller. The writing function may be realized. In this case, by sliding a roller provided on the pen tip on the paper surface and rolling it, a line having a line width corresponding to the width of the roller can be written with the first ink 31. In such a configuration, it is possible to write a line having an arbitrary line width by appropriately setting the width of the roller. That is, by appropriately setting the width of the roller, it is possible to realize a configuration in which a relatively wide line width d1 can be written.

Further, for example, the first writing function may be realized by a so-called brush pen. Specifically, for example, the first writing function may be realized including a pen tip imitating a brush and a mechanism for supplying the first ink 31 to the pen tip. In such a configuration, when the user applies pressure, the pen tip bends and a line having a relatively thick line width is written. The line width of the line to be written depends on the size of the pen tip, the ease of bending, and so on. Therefore, by appropriately adjusting these, it is possible to realize a configuration in which a relatively wide line width d1 can be written.

Further, for example, the second writing function may be realized by a so-called ballpoint pen. Specifically, for example, a second pen tip including a pen tip having a built-in ball (rigid ball) rotatably configured by sliding on a paper surface, and a mechanism for supplying the second ink 32 to the pen tip. The writing function may be realized. In this case, by appropriately adjusting the size of the ball, it is possible to realize a configuration in which a line width d2 having a relatively narrow width can be written.

Further, the specific shape, specifications, and other detailed configurations of each part can be variously modified without departing from the spirit of the present invention. Needless to say, the configurations according to the embodiments and the modifications may be appropriately combined.

P Writing tool 10 Shaft cylinder 11 1st pen tip 12 2nd pen tip 20 Partition 21 1st ink holding part 22 2nd ink holding part 31 1st ink 32 2nd ink C1 1st ink color C2 2nd ink color

Claims (10)

A writing instrument having a first writing function for writing with a first line width and a second writing function for writing with a second line width narrower than the first line width.
The first ink for the first writing function and the second ink for the second writing function have similar colors.
The saturation of the second ink is higher than the saturation of the first ink.
A writing tool that is characterized by that. The writing tool according to claim 1.
The brightness of the second ink is higher than the brightness of the first ink.
A writing tool that is characterized by that. A writing instrument having a first writing function for writing with a first line width and a second writing function for writing with a second line width narrower than the first line width.
The first ink for the first writing function and the second ink for the second writing function have similar colors.
The brightness of the second ink is lower than the brightness of the first ink.
A writing tool that is characterized by that. The writing tool according to claim 3.
The saturation of the second ink is higher than the saturation of the first ink.
A writing tool that is characterized by that. The writing tool according to claim 3.
The saturation of the second ink is lower than the saturation of the first ink.
A writing tool that is characterized by that. The writing tool according to any one of claims 1 to 5.
The first ink contains a resin pigment.
A writing tool that is characterized by that. The writing tool according to any one of claims 1 to 6.
The second ink contains a dye.
A writing tool that is characterized by that. The writing tool according to any one of claims 1 to 7.
The pen tip for the first writing function is provided at one end of the barrel, and the pen tip for the second writing function is provided at the other end of the barrel.
A writing tool that is characterized by that. The writing tool according to any one of claims 1 to 8.
A first ink holding unit that holds the first ink,
A second ink holding unit that holds the second ink so as not to come into contact with the first ink,
A writing tool characterized by being equipped with. The writing tool according to claim 9.
The holding amount of the first ink in the first ink holding portion is larger than the holding amount of the second ink in the second ink holding portion.
A writing tool that is characterized by that.

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