JP2023056467A - Writing instrument for erasing characters and method for erasing written content using the writing instrument - Google Patents

Abstract

To provide a ballpoint pen for erasing characters.SOLUTION: There is provided a writing instrument including: a housing (110) including a tubular-shaped upper body, a lower body (112) and a port (113); an ink containing tube (130) filled with an ink composition inside the housing; a ballpoint pen contact (140) present at an endmost; a knock cap; and a spring (160) actuating the ballpoint pen contact by elastic force. The ink composition filled in the ink containing tube contains 20-30 wt.% of hysteresis microcapsule pigment, 1-3 wt.% of styrene maleic anhydride monomethyl maleic polymer, 1-5 wt.% of methyl stearate, 15-20% of methyl behenate, 5-10 wt.% of glycerin, 3-5 wt.% of polyvinylpyrrolidone, 1-3 wt.% of triethanolamine, 1-12% of sodium lauryl sulfate, and the balance being ionized water. The lower body is partially or entirely formed of a tip eraser (200).SELECTED DRAWING: Figure 3

Description

The present invention relates to a writing implement for erasing characters and a method for erasing written content using the writing implement, and more particularly, the user of the writing implement writes characters or draws figures on an object to be written using the writing implement. Then, the present invention relates to a writing utensil capable of easily and quickly erasing the characters while the writing utensil is being held by hand, and a method of erasing the written contents of the writing utensil.

2. Description of the Related Art Today, various types of writing implements have been developed as means for writing characters on paper and representing letters and numbers. A ball-point pen and a fountain pen can be exemplified as typical writing utensils of today.

A ballpoint pen, which is an abbreviation of ballpoint pen, is the most widely used writing instrument today.

A ballpoint pen has an ink containing tube filled with viscous ink inside, and a point ball at the end of the ink containing tube is used to apply the ink composition inside the ink containing tube to a paper to write a predetermined character or a predetermined amount. Allows you to draw a picture of Ballpoint pens are inexpensive, reliable, inexpensive to purchase and use, and have been widely used as everyday writing instruments, and today they are used almost as a substitute for fountain pens.

Unlike fountain pens, ballpoint pens do not need to be filled with ink separately by the user and have the advantage of being able to select and use various colors of ink. It is widely used because of its sexiness and convenience. However, ballpoint pens have a drawback in that after a user writes a predetermined character on the surface of a writing object such as paper, it is difficult to erase the character, unlike a pencil. In order to overcome these drawbacks of ballpoint pens, we developed a ballpoint pen that erases writing.

Conventionally, the working principle of the disappearing ballpoint pen is that the ink composition filled in the ink containing tube is made of temperature-sensitive ink that changes color depending on the temperature, and the ink component that exists in a specific color at room temperature changes to another color at high temperature. It utilizes the property that the color disappears.

Such a conventional erasable writing instrument uses, for example, a temperature-sensitive ink that develops color at -10°C to 50°C as the ink of the writing instrument, and the pigment molecules of the temperature-sensitive ink are generated by frictional heat generated when rubbing with a plastic eraser. causes a chemical reaction that causes the color to disappear.

For this purpose, an elastomer eraser is attached to the opposite end of the writing instrument, and in order to erase the written content, the elastomer eraser attached to the opposite side of the ballpoint pen core is rotated to come into contact with the written content, The elastomer eraser is rubbed on characters, etc. to cause friction between them, and the frictional heat generated by the friction is used to change the color of the ink composition so that the characters, etc., are erased. This optical illusion effect is used.

Such conventional thermochromic ink writing instruments require the use of an eraser on the opposite side of the ballpoint pen core of the writing instrument in order to use the eraser to erase the writing on the writing surface. The eraser is mainly composed of an elastomer containing a rubber component, and is connected to the opposite end of the writing instrument. It is necessary to make contact with the target object.

At this time, the eraser causes friction against the writing content written on the writing object, and the frictional heat generated at this time is transferred to the ink component contained in the writing content, The frictional heat will discolor the ink components.

However, with conventional thermochromic ink writing utensils, the frictional heat is not stored in the eraser but is released in the process of rubbing the writing surface with the eraser. Frictional heat must be continuously generated by friction even when erasing other writings. Therefore, there is a problem that the writing surface is damaged by continuous friction (eg Korean Patent No. 10-1377293).

In addition, since the conventional thermochromic ink writing instrument must generate frictional heat, a separate elastomer eraser must be attached or combined with the body of the writing instrument as a frictional heat generating tool. In addition, when the user of the conventional thermochromic ink writing instrument wants to erase a character, the writing operation is interrupted, and while the thermochromic ink writing instrument is held in the opposite direction, the elastomer eraser is used to write on the writing surface. It was something that had to be removed by rubbing the characters and the like. Therefore, the conventional thermochromic ink writing instrument often loses the elastomer eraser.

In addition, since the eraser of the conventional thermochromic ink writing instrument is mainly composed of synthetic rubber that is easily erased by frictional heat, it is difficult to remove the eraser when the strength of the eraser is increased. On the other hand, when the strength of the eraser is lowered, it has the advantage of being erased well, but the eraser is not firmly attached and may break (Fig. 5), be lost, or be separated when assembled. (Example: Korean Patent No. 10-0642350).

In addition, the conventional thermochromic ink writing instrument was in progress to write letters, etc., but when trying to correct the wrong content, the writing work was always interrupted and the gripping position of the ink writing instrument was changed. After that, I had no choice but to erase the characters.

On the other hand, writing requires a high degree of concentration, grasping the momentary idea, and projecting the feeling and expression of that moment into writing. It is imperative that the writing process continues uninterrupted.

In conclusion, there is a strong demand for the development of a writing instrument for an eraser that can utilize the body of the writing instrument as it is without using a friction material separately attached or combined with the body of the writing instrument in the conventional writing instrument for an eraser. It seems that such a technology has not yet been developed. As a conventional technique, the following cases are considered representative.

Korean Patent No. 10-2179179 Korean Patent No. 10-2169972 Korean Patent No. 10-2191748 Korean Patent No. 10-1876526 Korean Registered Utility Model No. 20-489134

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems of the prior art. To provide a writing utensil capable of directly erasing in the direction of writing without changing.

Another object of the present invention is to provide a writing instrument that can be easily erased without using an elastomer eraser of the writing instrument.

Another object of the present invention is to prevent the eraser residue from being generated in the process of erasing the written contents, prevent the surroundings from being dirty, reduce the volume due to wear even after repeated use, and replace the eraser with a new one. To provide an unnecessary writing utensil.

In order to achieve the above object, the present invention provides a housing comprising an upper body, a lower body and a port in the form of a hollow tubular body, and an ink containing ink formed from the interior of the housing. a container tube, a ballpoint pen handle present at the tip of the ink container tube, a knock cap for vertically reciprocating the ink container tube from behind the housing, and the ballpoint pen inside the housing. In a writing instrument containing a spring that actuates the tactile elastic force, the ink composition filled in the ink reservoir contains 20 to 30% by weight of microcapsulated hysteresis microcapsule pigment and 1 to 3% by weight of styrene maleic anhydride monomethylmaleic acid polymer, 1 to 5% by weight of glyceryl methylstearate as adhesion control agent, 15% to 20% by weight of methylbehenate as adhesion control agent and antibacterial agent, adhesion control agent and moisturizing agent. 5-10% by weight of glycerin as an agent, 3-5% by weight of polyvinylpyrrolidone as a viscosity modifier, 1-3% by weight of triethanolamine as a neutralizing agent, and 1-3% by weight of sodium lauryl sulfate as a surfactant. 2% by weight, the rest being ionized water, the lower body is partially or wholly formed of a tip erasing body, and the tip erasing body is present at a position where the ballpoint pen tip enters and exits, and is used. It is characterized by being used for the purpose of erasing the written contents that a person wrote by mistake.

As the material of the tip erasing body, although polypropylene is the main component, 5 to 10 parts by weight of hydrogenated styrene-isoprene-butadiene block copolymer, 5 to 10 parts by weight of hydrotrited heavy paraffinic, and 1 , 2, 3 0.2 to 0.5 parts by weight of benzotriazole and the remainder is made up of the polypropylene.

In addition, the tip eraser forms part or all of the lower body of the housing, and its corners (R) are formed in a round shape, and the size of the round formation is between 0.5 and 1.5 mm. It is desirable to be formed with

Further, the tip erasing body is characterized in that its surface roughness is in the range of 1.5 Ra to 3.0 Ra.

Here, when the tip eraser is intended to give a color corresponding to or distinguished from the housing of the writing instrument, it is preferable to add 0.002 to 0.02 parts by weight of the pigment pigment with respect to the total weight.

The present invention also provides a method of erasing written content written on the surface of a writing object using the writing instrument.

The method of erasing written content according to the present invention is a method in which a user writes, draws, or expresses written content (W) on the surface of a writing object (P) as intended by a user using a writing instrument. 1st step (S210); 2nd step (S220) in which the user puts the ballpoint tip of the writing instrument inside the writing instrument and hides it; and the tip is erased while the user is holding the writing instrument. a third step (S230) of placing the body on the surface of the writing object to contact the writing content to be erased; A fourth step (S240) of erasing the written contents by reciprocating in a direction is included.

The present invention can erase erroneously written letters or numbers using a part of the body of the writing instrument.

Further, in the present invention, after writing characters on paper using a writing instrument, when trying to erase the characters, there is no need to switch the writing instrument back and forth, and the character can be written in the same posture. An erasing operation can be performed using the tip erasing body. Therefore, the present invention not only makes the erasing operation very convenient, but also enables the erasing operation to be performed quickly.

In addition, since the present invention does not require a separate eraser and uses a part of the body of the writing instrument, there is no need to worry about losing the eraser.

In addition, the present invention does not generate eraser shavings during the process of removing written content, thereby preventing the surroundings from becoming dirty.

In addition, the present invention has the effect of reducing the volume due to wear even when the eraser member is repeatedly used, and there is no need to replace the eraser with a new one.

1 is a partially cutaway cross-sectional view showing the configuration of a normal ballpoint pen; FIG. 1 is a conceptual diagram simulating the appearance of writing characters or the like on the surface of an object to be written using the writing implement of the present invention. FIG. FIG. 2 is a conceptual diagram simulating a state of erasing characters, which are written contents recorded on the surface of an object to be written, using the writing implement of the present invention. FIG. 4 is an enlarged cross-sectional view showing an enlarged configuration of a lower main body including a tip eraser; 1 is a conceptual diagram illustrating a state in which an elastomer eraser attached to the upper portion of a conventional writing instrument breaks and separates during use; FIG.

Hereinafter, the present invention will be described more concretely and in detail. The specific numerical values or specific examples provided in the present invention are preferred embodiments of the present invention and are intended to explain the technical idea of the present invention in more detail, and the present invention is limited thereto. It is clear that the

In the present invention, the term "front" or "tip" refers to the portion of the writing instrument where the ballpoint pen is located, and the direction in which the ballpoint pen is out of or into the writing instrument. It means the direction in which the knock cap exists. It should be noted that weight % means the weight of the component relative to the entire composition, unless otherwise specified.

In addition, in the specification of the present invention, detailed descriptions of parts that have been disclosed in the technical field and can be easily created by those skilled in the art will be omitted.

The present invention provides a writing instrument (100) for erasing characters (W) written erroneously on the surface of a writing object (P). A representative example of the writing instrument (100) is a ballpoint pen. In the drawings of the present invention, the writing instrument is illustrated as a ballpoint pen. The writing object (P) can be representatively exemplified by paper, and the letters, etc. (W) are letters, numbers, written or described on the surface of the writing object (P). It means a symbol, a picture, etc.

FIG. 1 is a partially cutaway cross-sectional view showing the structure of an ordinary ballpoint pen.

The present invention can use an ordinary ballpoint pen with further improvements.

A writing instrument (100) according to the present invention includes a hollow tubular housing (110) which is divided into an upper body (111) and a lower body (112) and screw-assembled. The upper body 111 and the lower body 112 may be integrally formed. A doorway (113) is formed at the tip of the lower body (112). An ink containing tube (130) is included inside the housing (110), and the ink containing tube (130) contains an ink composition that allows writing content to be distinguished. A tip of the ink containing tube (130) is connected with a ballpoint pen tip (140) for thinly flowing the ink composition. The ballpoint pen holder (140) enters or exits the writing instrument through the entrance (113). There is a knock cap (150) that is moved in and out to move the ballpoint pen contact (140) up and down together with the ink containing tube (130) on the upper part of the housing (110). 110), a spring (160) is installed inside.

When the user operates the knock cap (150) to move in and out of the ink container (130) including the ballpoint pen handle (140), the teeth provided at the bottom of the knock cap (150) rotate the cam. (not shown) to move the ballpoint pen (140) up and down. When the knock cap (150) is pressed, the ink container (130) descends, compressing the spring (160) and pushing the ballpoint pen (140) through the opening (113) of the lower body (112). exposed to the outside. When the knock cap (150) is pressed again, the ballpoint pen contact (140) exposed outside the lower body (112) moves to the upper inside of the housing (110) together with the ink container (130) due to the resilience of the spring (160). be moved.

FIG. 2 is a conceptual diagram simulating the appearance of writing characters (W) on the surface of an object (P) to be written using the writing instrument (100) of the present invention, and FIG. 3 is the present invention. 4 is a conceptual diagram simulating the appearance of erasing characters (W) recorded on the surface of a writing object (P) using a writing instrument (100), and FIG. 4 is a tip erasing body (200) Fig. 3 is a cross-sectional view showing an enlarged view of the configuration of the lower body (112) including the ;

The tip erasing body (200) of the writing instrument for erasing characters according to the present invention does not use an elastomer eraser similar to the conventional one, but uses the body of the writing instrument to write on the surface of the writing object without moving the writing instrument back and forth. It is technically characterized in that the written content that is written on the writing instrument is erased by the body of the writing instrument.

When using the writing tip eraser according to the present invention, the writing can be easily erased without using a separate elastomer eraser. Further, in the present invention, after writing a character (W) on a piece of paper, which is an object to be written, the writing instrument (100) is not changed in direction, and the writing instrument (100) is held while holding the paper. The technical feature is to be able to immediately erase the characters written on the .

Such technical features can be achieved by improving the structure of the ink formation filling the ink reservoir tube (140) and the lower body (112) of the housing (110) as follows.

The writing instrument (100) ink formulation according to the present invention comprises: 20-30% by weight of microencapsulated hysteresis microcapsule pigment; 1-3% by weight of styrene maleic anhydride monomethyl maleic acid polymer as flow improver; adhesion control agent. 15-20% by weight of methylbehenate as an adhesion control agent and antibacterial agent; 5-10% by weight of glycerin as an adhesion control agent and humectant; 3-5% by weight of polyvinylpyrrolidone as a viscosity control agent. 1-3 wt% triethanolamine as a neutralizing agent; 1-2 wt% sodium lauryl sulfate as a surfactant; and the balance is made up of ionized water.

In the present invention, the ink composition filled in the ink reservoir tube (140) contains 20-30% by weight of microencapsulated hysteresis microcapsule pigment. The hysteresis pigment is used to express the color of letters (W), etc., and is micro-sized fine capsules powdered, and is in the range of 20% to 30% by weight based on the total weight. use in

The hysteresis pigment expresses colors such as black, red, pink, green, and blue depending on the color of the ballpoint pen used. Characters (W) include various characters, numerals, symbols, pictures, etc. that are written or drawn on the paper that is the writing object (P).

The ink composition filled in the ink containing tube (140) contains 1 to 3% by weight of styrene maleic anhydride monomethyl maleic acid polymer. The styrene maleic anhydride monomethyl maleic polymer is used to impart fluidity to the ink composition or improve its fluidity. Such fluidity of the ink allows the user to freely write letters (W) or draw pictures on the paper (P), which is the writing object (P), without feeling any inconvenience. , to enable the ballpoint pen.

In addition, the ink composition filled in the ink containing tube (140) contains 1 to 5% by weight of methyl stearate and 15 to 20% by weight of methylbehenate. The methylbehenate component imparts tackiness and antimicrobial properties to the ink composition and a combined function as an adhesion control agent. Adhesive performance enhances the mixing and bonding properties with other materials or components constituting the ink composition, so that the letter (W) can be continuously written with a ball-point pen.

In addition, the methylbehenate imparts antibacterial properties to the ink composition, and even when the ink composition is stored for a long time without being used for a long time, the ink composition can be maintained in a stable state continuously from spoilage bacteria that may be infected from the outside. maintainable to

In addition, when the ink composition is fixed in the form of letters (W) on the paper that is the writing object (P), the methyl behenate is present between the ink and the paper that is the writing object (P). Performs a function to assist in regulating cohesive strength. At this time, the methylbehenate acts to weaken the binding force between the ink and the paper, which is the writing object (P), as compared with the conventional normal ink.

In general, when a conventional ink composition for a ballpoint pen exists in the form of a character (W) on the paper, which is the object to be written (P), the conventional ink composition for a ballpoint pen is By partially penetrating into the paper, the ballpoint pen ink composition tends not to be completely removed from the surface of the paper when an external force is applied. In other words, the general ball-point pen ink composition maintains the shape of the letter (W) as it is, or remains in a partially removed state, and does not completely disappear. Therefore, conventional erasable inks have their constituents discolored by frictional heat, thereby providing an effect of removing the colors seen by the user's naked eyes.

On the other hand, the ink used in the erasable ball-point pen of the present invention completely deposits on the inner surface of the paper, which is the writing object (P), by weakening or adjusting the binding force with the paper. It can be seen that the binding force is weaker than that of the conventional general ink composition.

The ink composition of the writing instrument (100) according to the invention contains 5-10% by weight of glycerin.
The glycerin functions as a moisturizing agent and a lubricant, and since it contains a large amount of hydroxyl groups in its molecular structure, it imparts moisturizing properties to the ink component and supplements lubricity. The lubricity is useful for preventing abrasion of the ball portion present at the lower end portion of the ink containing tube (130) of the ballpoint pen, and the ink is applied to the surface of the paper, which is the writing object (P), such as letters (W). When present in a form, it prevents it from penetrating into the interior of the paper.

In addition, the lubricity assists the letter (W) to easily fall off the surface of the paper when a predetermined force is applied to the letter (W) from the outside. This is because the glycerin component provides lubricity, thereby providing moisture retention between the internal components of the ink, while weakening the bond between the ink composition and paper as a lubricant. contribute to

The ink composition of the writing instrument (100) according to the invention contains 3-5% by weight of polyvinylpyrrolidone. The polyvinylpyrrolidone acts as an ink viscosity modifier to agglomerate water-soluble polymer components, thereby controlling the viscosity of the entire ink composition.

The ink composition of the writing instrument (100) according to the invention contains 1-3% by weight of triethanolamine. The triethanolamine functions as a stabilizer or neutralizer and is used to improve ink aggregation and dispersibility.

The ink composition of the writing instrument (100) according to the present invention contains 1-5% by weight of sodium lauryl sulfate. Said sodium lauryl sulfate is used as a surfactant.

The ink composition of the writing instrument (100) according to the present invention consists of ionized water. The ionized water functions as a solvent for the constituent components.

Such an ink composition is manufactured in a conventional manner and filled into the ink containing tube (130). The ink composition allows the user to easily erase the content written on the writing object (P).

A writing instrument (100) according to the present invention includes a tip erasing body (200) that allows for simple and easy erasing of content written on a writing object (P).

The writing instrument (100) has a cylindrical housing (110) on the outside, and a lower body (112) formed in the front to be narrowed and inclined at the center. 112) forms an upper body (111) that is assembled in a screw fastening manner. It is desirable to assemble and use a rubber pad (120) around the lower body (112) in order to prevent slippage and improve touch feeling when a user grips it with his/her hand to perform writing work. The writing instrument (100) has a knock cap (150) operated by a push button at the rear.

The housing (110) includes an ink containing tube (130) containing ink for writing, and the tip of the ink containing tube (130) forms a metallic ballpoint pen contact (140). ing. A spring (160) is inserted just outside the ballpoint pen contact (140), and the spring (160) pushes the ballpoint pen contact (140) to the lower body (112) by pushing the knock cap (150). It is exposed to the outside through the doorway (113), or the ballpoint pen touch (140) is housed inside it.

A writing instrument (100) according to the present invention includes a tip erasing body (200) that allows for simple and easy erasing of content written on a writing object (P). The tip eraser (200) preferably forms part or all of the lower body (112).

The tip erasing body (200) is formed in the lower body (112) forming the entrance (113) to erase characters (W) written on the surface of the writing object (P). It is The ballpoint pen holder (140) enters and exits in the vertical direction through the entrance (113). The tip erasing body (200) is present at the position where the entrance (113) is formed, and is technically formed at the position where the ballpoint pen tip (140) enters and exits in the vertical direction.

The tip erasing body (200) forms part of the body of the writing instrument (100), and forms the front of the writing instrument (100), more specifically, the entrance (113) of the lower body (112). However, it is more desirable that the outer peripheral edge of the ballpoint pen handle (140) is wrapped.

It is preferable that the tip erasing body (200) forms a part or all of the lower body (112) and has a rounded shape at a corner (R) between the end surface and the side surface. The rounded shape of the corner (R) is formed by placing the writing instrument (100) on the paper while being inclined at a certain angle as shown in FIGS. When pressing the (W) part, such as a character written on the paper, it will substantially contact the paper. Therefore, the corner (R) between the end face and the side face of the lower body (112) must be rounded to prevent the paper from being severely damaged during the erasing process.

The size of the corner round (R) is suitably between 0.5 and 1.5 mm, and preferably can be set to 0.75 mm. If the dimension of the corner round (R) is less than 0.5mm, the paper is more likely to be damaged. There are cons.

Thus, in the present invention, the tip erasing body (200) forms part or all of the lower body (112) of the writing instrument (100), and the ball-point pen contact (112) of the lower body (112) of the writing instrument. 140) are in close proximity to each other.

When the tip erasing body (200) is formed in the vicinity of the lower body (112) where the ballpoint pen tip (140) enters and exits, a person using the writing instrument (100) of the present invention can erase the already written part. When trying to erase, the user can perform the erasing work while holding the writing instrument (100) of the present invention.

In the present invention, in the case of the tip erasing body (200), it is primarily formed of a synthetic resin material mainly composed of polypropylene resin because it forms part or all of the main body of the writing instrument (100). Therefore, the strength of the main body of the writing instrument must be maintained, and secondarily, the strength must be such that the written content to be deleted can be removed from the surface of the writing object. Second, it must be able to provide a predetermined surface roughness for the writing content to be erased on the surface of the writing object and maintain the surface roughness.

The tip erasing body (200) is mainly used for erasing the contents of writing written by the user by mistake, and its material is mainly made of polypropylene resin. 5 to 10 parts by weight of block copolymer; 5 to 10 parts by weight of hydrotrited heavy paraffinic; 0.2 to 0.5 parts by weight of antioxidant 1, 2, 3 benzotriazole; Contains resin.

The tip erasable body (200) is mainly made of polypropylene resin. Since the tip erasing body (200) primarily forms part or all of the lower body of the writing instrument (100) as described above, it must maintain the strength of the writing instrument body. Secondly, it must have the strength to allow the written content to come out of the surface of the writing object, and thirdly, it must have the contact surface roughness for the written content to be erased. . The polypropylene resin is used to provide such functions.

Unlike the conventional elastomer eraser, the tip eraser (200) is not worn out even after several times of erasing work, and always maintains the initial shape, and the predetermined surface roughness is measured by an illuminometer. .5 Ra to 3 Ra range will continue to be maintained. When the tip eraser (200) maintains the range of surface roughness as described above, it is adapted to effectively erase written content.

The tip erasing body (200) contains 5 to 10 parts by weight of a hydrogenated styrene-isoprene-butadiene block copolymer with respect to the total weight. The hydrogenated styrene-isoprene-butadiene block copolymer provides a certain flexibility to the tip-erasing body (200).

The hydrogenated styrene-isoprene-butadiene block copolymer is a compound obtained by copolymerizing a styrene component and a butadiene component with each other, and has a double bond structure inside the polymer, making it strong and firm. By imparting relatively flexibility to the polypropylene main component, it provides the function of eliminating the drawback of being easily crushed or broken due to external impact.

When the hydrogenated styrene-isoprene-butadiene block copolymer is contained in 5 parts by weight or less, the flexibility thereof is weak. If so, it weakens the strength of the tip erasing body (200), which is not desirable.

The tip erasing body (200) contains 5 to 10 parts by weight of hydrotrited heavy paraffinic with respect to the total weight. The hydrotrited heavy paraffinic provides a predetermined contact surface roughness to the tip eraser (200).

This is because the hydrotrited heavy paraffinic component is included, so that the tip erasing body (200) is in close contact with the written content to be erased, and when it is pressed and moved in the left-right direction, To allow written contents to come out from the surface of an object to be written without slipping.

When the hydrotrited heavy paraffinic component is less than 5 parts by weight, the surface roughness of the tip erasing body (200) is less than 1.5 Ra, which makes it difficult to smoothly remove written contents. On the other hand, when the hydrotrited heavy paraffinic component is 10 parts by weight or more, the surface roughness of the tip erasing body (200) becomes 3.0 Ra or more, which is undesirable.

When the hydrotrited heavy paraffinic component is in the range of 5 to 10 parts by weight, when the user rubs the tip eraser (200) on the writing object, the so-called sticky feeling is felt. will provide.

Such a method can be said to be a method completely different from the technical idea of the conventional technology utilizing thermal deformation due to frictional heat.

The tip erasing body (200) contains antioxidants 1, 2, 3 and 0.2-0.5 parts by weight of benzotriazole with respect to the total weight. 1, 2, 3, and benzotriazole function as antioxidants. When the antioxidant is used in an amount of less than 0.2 parts by weight, the anti-oxidation function cannot be properly performed. Since it does not rise, it is undesirable to include more.

While the ball-point pen handle (140) enters and exits the writing instrument through the entrance (113), the ball-point pen handle (140) contacts the tip erasing body (200) wrapped around its outer periphery. In this case, the tip erasing body (200) may undergo an oxidation reaction due to the metal component of the ballpoint pen contact (140). In order to prevent such oxidation reaction, the 1,2,3 benzotriazole is used as an antioxidant.

The tip erasing body (200) is desirably composed of the polypropylene for the rest of the total weight. The polypropylene is necessary to maintain the strength of the tip eraser (200). Generally, it is present in the range of 80 to 90 parts by weight based on the total weight, but may vary slightly between the lower and upper ranges depending on the content of each component listed above.

When the tip erasing body 200 is intended to give a corresponding or distinct color to the body of the writing instrument, 0.002 to 0.02 parts by weight of a pigment pigment may be added with respect to the total weight. Said pigment pigments impart color and are commonly used in the art.

In addition, the present invention provides a method of erasing written content using the writing instrument (100).
The method of erasing written content according to the present invention is as follows.

The method of erasing written content according to the present invention is the first step (S210) in which the user writes or expresses the written content (W) on the surface of the writing object (P) using the writing implement (100) according to his/her intention. ).

In the first step (S210), the user holds the writing instrument in his or her hand and writes or draws the intended content on the surface of the object to be written. or any other form of expression. The step of writing the written content (S210) proceeds in the same manner as in the conventional method.

The method of erasing written content according to the present invention includes a second step (S220) in which the user puts the ballpoint tip (140) of the writing instrument inside the main body of the writing instrument. The second step (S220) can be said to be a step of storing the ballpoint pen.

The second step (S220) is an essential step that must be performed when the user wants to erase the written content. The user draws the ballpoint pen feeler (140) to the rear of the writing instrument by the elasticity of a spring (160) provided inside the writing instrument, so that the ballpoint pen feeler (140) does not protrude to the front tip of the writing instrument. This is to prevent other characters or pictures from being written on the surface of the object to be written.

When proceeding to the next third step (S230) without proceeding to the second step (S220), there is a possibility that unintended writing content may be written on the surface of the writing object by the ballpoint pen (140). Also, the third step (S230) cannot be smoothly performed.

From this point of view, the second step (S220) according to the present invention must be performed in the case of the present invention. sometimes not.

The method of erasing the written content according to the present invention is as follows: while the user is holding the writing instrument, the tip erasing body (200) is applied to the surface of the writing object (P), and the writing content to be erased is erased. It includes a third step of contacting (S230). The third step (S230) can be said to be a step of contacting the tip erasing body (200).

In the third step (S230), while the user is holding the writing instrument (100), the writing instrument (100) is erased at the original holding position without changing the position of the writing instrument (100). means to do work. In the case of conventional writing instruments, this is completely different from the act of the user always changing the position of the writing instrument back and forth and holding it again.

In the case of a conventional writing instrument, since an elastomer eraser is attached to the rear of the writing instrument, by gripping the conventional writing instrument while changing its position back and forth, the position of the elastomer eraser at the rear is changed to the front. However, in the case of the present invention, the front end erasing body (200) existing in the front of the main body of the writing instrument (100) can be used as it is.

In the third step (S230), while maintaining the gripped state of the writing instrument (100), it is applied to the surface of the writing object (P), and the writing content to be erased by the tip erasing body (200) come into contact with At this time, the tip erasing body (200) forms part or all of the lower body (112) of the writing instrument (100). When the tip erasing body (200) is positioned at the front of the lower body (112), the user does not turn the writing instrument (100) back and forth when performing the erasing work, and does not turn the writing instrument (100) over. This is because the work can be carried out while holding the writing instrument (100) as it is.

The method of erasing the written content according to the present invention includes a fourth step (S240) of erasing the written content by moving the tip erasing body (200) lightly on the surface of the writing object and reciprocating it in the horizontal direction. The fourth step (S240) can be said to be a kind of erasing step.

In the fourth step (S240), the user holds the writing instrument (100) with his/her hand and lightly presses the tip erasing body (200) toward the written content that the user wants to erase. This is for causing friction by bringing the tip erasing body (200) and the writing contents to be erased into contact with each other. In this case, the tip erasing body (200) does not use an elastomer eraser unlike the conventional one. The tip erasing body (200) has a surface roughness within the range of 1.5 Ra to 3 Ra.

In the fourth step (S240), the user presses the tip erasing body (200) lightly and reciprocates in the horizontal direction, thereby pushing out and removing the written contents from the surface of the writing object. The conventional method of removing written content is the same as rubbing an elastomer eraser to generate a friction temperature, discoloring the written content on the surface of the writing object due to the friction temperature, and discoloring the written content. It was an effective method.

On the other hand, according to the present invention, the tip erasing body (200) is brought into close contact with the writing content written on the surface of the writing object, and a close contact force is applied to remove the writing content from the surface. This method removes the written contents.

Therefore, in the fourth step (S240), even if the actions observed from the outside look the same, this is the difference between the present invention and the conventional prior art. They are completely different.

According to this feature of the present invention, it is not necessary to change the hand of the writing instrument back and forth when erasing the characters after writing on the paper using the writing instrument.

In addition, since the erasing operation can be performed by using the tip erasing body as the characters are written, the erasing operation is very convenient and can be performed quickly.

In addition, since the present invention does not require a separate eraser and uses a part of the body of the writing instrument, there is no need to worry about losing the eraser.

Although the writing instrument for erasing characters and the method for using the same according to the present invention have been specifically presented above, they are only embodied in the process of describing the embodiments of the present invention, and all the features of the present invention are described above. It should not be construed as being limited to apply only to the items listed.

Also, anyone skilled in the art can make various modifications and imitations according to the description of the specification of the present invention, but it is clear that this is not beyond the scope of the present invention.

REFERENCE SIGNS LIST 100 writing instrument 110 housing 130 ink containing tube 140 ballpoint pen handle 150 knock cap 160 spring 200 tip erasing body P writing object W writing content

The present invention relates to a writing implement for erasing characters and a method for erasing written content using the writing implement, and more particularly, the user of the writing implement writes characters or draws figures on an object to be written using the writing implement. Then, the present invention relates to a writing utensil capable of easily and quickly erasing the characters while the writing utensil is being held by hand, and a method of erasing the written contents of the writing utensil.

2. Description of the Related Art Today, various types of writing implements have been developed as means for writing characters on paper and representing letters and numbers. A ball-point pen and a fountain pen can be exemplified as typical writing utensils of today.

A ballpoint pen, which is an abbreviation of ballpoint pen, is the most widely used writing instrument today.

A ballpoint pen has an ink containing tube filled with viscous ink inside, and a point ball at the end of the ink containing tube is used to apply the ink composition inside the ink containing tube to a paper to write a predetermined character or a predetermined amount. Allows you to draw a picture of Ballpoint pens are inexpensive, reliable, inexpensive to purchase and use, and have been widely used as everyday writing instruments, and today they are used almost as a substitute for fountain pens.

Unlike fountain pens, ballpoint pens do not need to be filled with ink separately by the user and have the advantage of being able to select and use various colors of ink. It is widely used because of its sexiness and convenience. However, ballpoint pens have a drawback in that after a user writes a predetermined character on the surface of a writing object such as paper, it is difficult to erase the character, unlike a pencil. In order to overcome these drawbacks of ballpoint pens, we developed a ballpoint pen that erases writing.

Conventionally, the working principle of the disappearing ballpoint pen is that the ink composition filled in the ink containing tube is made of temperature-sensitive ink that changes color depending on the temperature, and the ink component that exists in a specific color at room temperature changes to another color at high temperature. It utilizes the property that the color disappears.

Such a conventional erasable writing instrument uses, for example, a temperature-sensitive ink that develops color at -10°C to 50°C as the ink of the writing instrument, and the pigment molecules of the temperature-sensitive ink are generated by frictional heat generated when rubbing with a plastic eraser. causes a chemical reaction that causes the color to disappear.

For this purpose, an elastomer eraser is attached to the opposite end of the writing instrument, and in order to erase the written content, the elastomer eraser attached to the opposite side of the ballpoint pen core is rotated to come into contact with the written content, The elastomer eraser is rubbed on characters, etc. to cause friction between them, and the frictional heat generated by the friction is used to change the color of the ink composition so that the characters, etc., are erased. This optical illusion effect is used.

Such conventional thermochromic ink writing instruments require the use of an eraser on the opposite side of the ballpoint pen core of the writing instrument in order to use the eraser to erase the writing on the writing surface. The eraser is mainly composed of an elastomer containing a rubber component, and is connected to the opposite end of the writing instrument. It is necessary to make contact with the target object.

At this time, the eraser causes friction against the writing content written on the writing object, and the frictional heat generated at this time is transferred to the ink component contained in the writing content, The frictional heat will discolor the ink components.

However, with conventional thermochromic ink writing utensils, the frictional heat is not stored in the eraser but is released in the process of rubbing the writing surface with the eraser. Frictional heat must be continuously generated by friction even when erasing other writings. Therefore, there is a problem that the writing surface is damaged by continuous friction (eg Korean Patent No. 10-1377293).

In addition, since the conventional thermochromic ink writing instrument must generate frictional heat, a separate elastomer eraser must be attached or combined with the body of the writing instrument as a frictional heat generating tool. In addition, when the user of the conventional thermochromic ink writing instrument wants to erase a character, the writing operation is interrupted, and while the thermochromic ink writing instrument is held in the opposite direction, the elastomer eraser is used to write on the writing surface. It was something that had to be removed by rubbing the characters and the like. Therefore, the conventional thermochromic ink writing instrument often loses the elastomer eraser.

In addition, since the eraser of the conventional thermochromic ink writing instrument is mainly composed of synthetic rubber that is easily erased by frictional heat, it is difficult to remove the eraser when the strength of the eraser is increased. On the other hand, when the strength of the eraser is lowered, it has the advantage of being erased well, but the eraser is not firmly attached and may break (Fig. 5), be lost, or be separated when assembled. (Example: Korean Patent No. 10-0642350).

In addition, the conventional thermochromic ink writing instrument was in progress to write letters, etc., but when trying to correct the wrong content, the writing work was always interrupted and the gripping position of the ink writing instrument was changed. After that, I had no choice but to erase the characters.

On the other hand, writing requires a high degree of concentration, grasping the momentary idea, and projecting the feeling and expression of that moment into writing. It is imperative that the writing process continues uninterrupted.

In conclusion, there is a strong demand for the development of a writing instrument for an eraser that can utilize the body of the writing instrument as it is without using a friction material separately attached or combined with the body of the writing instrument in the conventional writing instrument for an eraser. It seems that such a technology has not yet been developed. As a conventional technique, the following cases are considered representative.

Korean Patent No. 10-2179179 Korean Patent No. 10-2169972 Korean Patent No. 10-2191748 Korean Patent No. 10-1876526 Korean Registered Utility Model No. 20-489134

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems of the prior art. To provide a writing utensil capable of directly erasing in the direction of writing without changing.

Another object of the present invention is to provide a writing instrument that can be easily erased without using an elastomer eraser of the writing instrument.

Another object of the present invention is to prevent the eraser residue from being generated in the process of erasing the written contents, prevent the surroundings from being dirty, reduce the volume due to wear even after repeated use, and replace the eraser with a new one. To provide an unnecessary writing utensil.

In order to achieve the above object, the present invention provides a housing comprising an upper body, a lower body and a port in the form of a hollow tubular body, and an ink containing ink formed from the interior of the housing. a ballpoint pen tip located at the tip of the ink reservoir tube; a knock cap for vertically reciprocating the ink reservoir tube from behind the housing; and the ballpoint pen inside the housing. In a writing instrument that includes a spring that actuates the tip by elastic force, the ink formulation that fills the ink reservoir includes 20-30% by weight of microcapsulated hysteresis microcapsule pigments and a flow improver. 1 to 3% by weight of styrene maleic anhydride monomethylmaleic acid polymer, 1 to 5% by weight of glyceryl methylstearate as adhesion control agent, 15% to 20% by weight of methylbehenate as adhesion control agent and antibacterial agent, adhesion control agent and moisturizing agent. 5-10% by weight of glycerin as an agent, 3-5% by weight of polyvinylpyrrolidone as a viscosity modifier, 1-3% by weight of triethanolamine as a neutralizing agent, and 1-3% by weight of sodium lauryl sulfate as a surfactant. 2% by weight, the rest being ion water, the lower body is partially or entirely formed of a tip erasing body, and the tip erasing body is present at a position where the ballpoint pen tip enters and exits, and is used. It is characterized by being used for the purpose of erasing the written contents that a person wrote by mistake.

As the material of the tip erasing body, although polypropylene is the main component, 5 to 10 parts by weight of hydrogenated styrene-isoprene-butadiene block copolymer, 5 to 10 parts by weight of hydrotrited heavy paraffinic, and 1 , 2, 3 0.2 to 0.5 parts by weight of benzol triazole and the balance is made up of the polypropylene.

In addition, the tip eraser forms part or all of the lower body of the housing, and its corners (R) are formed in a round shape, and the size of the round formation is between 0.5 and 1.5 mm. It is desirable to be formed with

Further, the tip erasing body is characterized in that its surface roughness is in the range of 1.5 Ra to 3.0 Ra.

Here, when the tip eraser is intended to give a color corresponding to or distinguished from the housing of the writing instrument, it is preferable to add 0.002 to 0.02 parts by weight of the pigment pigment with respect to the total weight.

The present invention also provides a method of erasing written content written on the surface of a writing object using the writing instrument.

The method of erasing written content according to the present invention is a method in which a user writes, draws, or expresses written content (W) on the surface of a writing object (P) as intended by a user using a writing instrument. 1st step (S210); 2nd step (S220) in which the user puts the ballpoint pen tip of the writing instrument into the inside of the writing instrument and hides it (S220); a third step (S230) of placing the body on the surface of the writing object to contact the writing content to be erased; A fourth step (S240) of erasing the written contents by reciprocating in a direction is included.

The present invention can erase erroneously written letters or numbers using a part of the body of the writing instrument.

Further, in the present invention, after writing characters on paper using a writing instrument, when trying to erase the characters, there is no need to switch the writing instrument back and forth, and the character can be written in the same posture. An erasing operation can be performed using the tip erasing body. Therefore, the present invention not only makes the erasing operation very convenient, but also enables the erasing operation to be performed quickly.

In addition, since the present invention does not require a separate eraser and uses a part of the body of the writing instrument, there is no need to worry about losing the eraser.

In addition, the present invention does not generate eraser shavings during the process of removing written content, thereby preventing the surroundings from becoming dirty.

In addition, the present invention has the effect of reducing the volume due to wear even when the eraser member is repeatedly used, and there is no need to replace the eraser with a new one.

1 is a partially cutaway cross-sectional view showing the configuration of a normal ballpoint pen; FIG. 1 is a conceptual diagram simulating the appearance of writing characters or the like on the surface of an object to be written using the writing implement of the present invention. FIG. FIG. 2 is a conceptual diagram simulating a state of erasing characters, which are written contents recorded on the surface of an object to be written, using the writing implement of the present invention. FIG. 4 is an enlarged cross-sectional view showing an enlarged configuration of a lower main body including a tip eraser; 1 is a conceptual diagram illustrating a state in which an elastomer eraser attached to the upper portion of a conventional writing instrument breaks and separates during use; FIG.

Hereinafter, the present invention will be described more concretely and in detail. The specific numerical values or specific examples provided in the present invention are preferred embodiments of the present invention and are intended to explain the technical idea of the present invention in more detail, and the present invention is limited thereto. It is clear that the

In the present invention, the front or tip is a portion of the writing instrument where the ballpoint pen tip is located, and the direction in which the ballpoint pen tip exits or enters the writing instrument. It means the direction in which the knock cap exists. It should be noted that weight % means the weight of the component relative to the entire composition, unless otherwise specified.

In addition, in the specification of the present invention, detailed descriptions of parts that have been disclosed in the technical field and can be easily created by those skilled in the art will be omitted.

The present invention provides a writing instrument (100) for erasing characters (W) written erroneously on the surface of a writing object (P). A representative example of the writing instrument (100) is a ballpoint pen. In the drawings of the present invention, the writing instrument is illustrated as a ballpoint pen. The writing object (P) can be representatively exemplified by paper, and the letters, etc. (W) are letters, numbers, written or described on the surface of the writing object (P). It means a symbol, a picture, etc.

FIG. 1 is a partially cutaway cross-sectional view showing the structure of an ordinary ballpoint pen.

The present invention can use an ordinary ballpoint pen with further improvements.

A writing instrument (100) according to the present invention includes a hollow tubular housing (110) which is divided into an upper body (111) and a lower body (112) and screw-assembled. The upper body 111 and the lower body 112 may be integrally formed. A doorway (113) is formed at the tip of the lower body (112). An ink containing tube (130) is included inside the housing (110), and the ink containing tube (130) contains an ink composition that allows writing content to be distinguished. A ball-point pen tip (140) is coupled to the tip of the ink containing tube (130) to thinly flow the ink composition. The ball-point pen tip (140) enters or exits the writing instrument through the entrance (113). There is a knock cap (150) that moves in and out in order to raise and lower the ballpoint pen tip (140) together with the ink containing tube (130) on the upper part of the housing (110). 110), a spring (160) is installed inside.

When the user operates the knock cap (150) to move in and out of the ink reservoir tube (130) including the ballpoint pen tip (140), the teeth provided at the bottom of the knock cap (150) rotate the cam. (not shown) to move the tip of the ballpoint pen (140) up and down. When the knock cap (150) is pressed, the ink container (130) descends, compressing the spring (160) and allowing the ballpoint pen tip (140) to pass through the inlet (113) of the lower body (112). exposed to the outside. When the knock cap (150) is pushed again, the ballpoint pen tip (140) exposed outside the lower body (112) moves to the upper inside of the housing (110) together with the ink container (130) due to the resilience of the spring (160). be moved.

FIG. 2 is a conceptual diagram simulating the appearance of writing characters (W) on the surface of an object (P) to be written using the writing instrument (100) of the present invention, and FIG. 3 is the present invention. 4 is a conceptual diagram simulating the appearance of erasing characters (W) recorded on the surface of a writing object (P) using a writing instrument (100), and FIG. 4 is a tip erasing body (200) Fig. 3 is a cross-sectional view showing an enlarged view of the configuration of the lower body (112) including the ;

The tip erasing body (200) of the writing instrument for erasing characters according to the present invention does not use an elastomer eraser similar to the conventional one, but uses the body of the writing instrument to write on the surface of the writing object without moving the writing instrument back and forth. It is technically characterized in that the written content that is written on the writing instrument is erased by the body of the writing instrument.

When using the writing tip eraser according to the present invention, the writing can be easily erased without using a separate elastomer eraser. Further, in the present invention, after writing a character (W) on a piece of paper, which is an object to be written, the writing instrument (100) is not changed in direction, and the writing instrument (100) is held while holding the paper. The technical feature is to be able to immediately erase the characters written on the .

Such technical features can be achieved by improving the structure of the ink formation filling the ink reservoir tube ( 130 ) and the lower body (112) of the housing (110) as follows.

The writing instrument (100) ink formulation according to the present invention comprises: 20-30% by weight of microencapsulated hysteresis microcapsule pigment; 1-3% by weight of styrene maleic anhydride monomethyl maleic acid polymer as flow improver; adhesion control agent. 15-20% by weight of methylbehenate as an adhesion control agent and antibacterial agent; 5-10% by weight of glycerin as an adhesion control agent and humectant; 3-5% by weight of polyvinylpyrrolidone as a viscosity control agent. 1-3 wt% triethanolamine as a neutralizing agent; 1-2 wt% sodium lauryl sulfate as a surfactant; and the balance is made up of ionized water.

In the present invention, the ink formulation that fills the ink reservoir tube ( 130 ) contains 20-30% by weight of microencapsulated hysteresis microcapsule pigment. The hysteresis pigment is used to express the color of letters (W), etc., and is micro-sized fine capsules powdered, and is in the range of 20% to 30% by weight based on the total weight. use in

The hysteresis pigment expresses colors such as black, red, pink, green, and blue depending on the color of the ballpoint pen used. Characters (W) include various characters, numerals, symbols, pictures, etc. that are written or drawn on the paper that is the writing object (P).

The ink composition filled in the ink containing tube ( 130 ) contains 1-3% by weight of styrene maleic anhydride monomethyl maleic acid polymer. The styrene maleic anhydride monomethyl maleic polymer is used to impart fluidity to the ink composition or improve its fluidity. Such fluidity of the ink allows the user to freely write letters (W) or draw pictures on the paper (P), which is the writing object (P), without feeling any inconvenience. , to enable the ballpoint pen.

The ink composition filled in the ink containing tube ( 130 ) contains 1-5% by weight of methyl stearate and 15-20% by weight of methylbehenate. The methylbehenate component imparts tackiness and antimicrobial properties to the ink composition and a combined function as an adhesion control agent. Adhesive performance enhances the mixing and bonding properties with other materials or components constituting the ink composition, so that the letter (W) can be continuously written with a ball-point pen.

In addition, the methylbehenate imparts antibacterial properties to the ink composition, and even when the ink composition is stored for a long time without being used for a long time, the ink composition can be maintained in a stable state continuously from spoilage bacteria that may be infected from the outside. maintainable to

In addition, when the ink composition is fixed in the form of letters (W) on the paper that is the writing object (P), the methyl behenate is present between the ink and the paper that is the writing object (P). Performs a function to assist in regulating cohesive strength. At this time, the methylbehenate acts to weaken the binding force between the ink and the paper, which is the writing object (P), as compared with the conventional normal ink.

In general, when a conventional ink composition for a ballpoint pen exists in the form of a character (W) on the paper, which is the object to be written (P), the conventional ink composition for a ballpoint pen is By partially penetrating into the paper, the ballpoint pen ink composition tends not to be completely removed from the surface of the paper when an external force is applied. In other words, the general ball-point pen ink composition maintains the shape of the letter (W) as it is, or remains in a partially removed state, and does not completely disappear. Therefore, conventional erasable inks have their constituents discolored by frictional heat, thereby providing an effect of removing the colors seen by the user's naked eyes.

On the other hand, the ink used in the erasable ball-point pen of the present invention completely deposits on the inner surface of the paper, which is the writing object (P), by weakening or adjusting the binding force with the paper. It can be seen that the binding force is weaker than that of the conventional general ink composition.

The ink composition of the writing instrument (100) according to the invention contains 5-10% by weight of glycerin.
The glycerin functions as a moisturizing agent and a lubricant, and since it contains a large amount of hydroxyl groups in its molecular structure, it imparts moisturizing properties to the ink component and supplements lubricity. The lubricity is useful for preventing abrasion of the ball portion present at the lower end portion of the ink containing tube (130) of the ballpoint pen, and the ink is applied to the surface of the paper, which is the writing object (P), such as letters (W). When present in a form, it prevents it from penetrating into the interior of the paper.

In addition, the lubricity assists the letter (W) to easily fall off the surface of the paper when a predetermined force is applied to the letter (W) from the outside. This is because the glycerin component provides lubricity, thereby providing moisture retention between the internal components of the ink, while weakening the bond between the ink composition and paper as a lubricant. contribute to

The ink composition of the writing instrument (100) according to the invention contains 3-5% by weight of polyvinylpyrrolidone. The polyvinylpyrrolidone acts as an ink viscosity modifier to agglomerate water-soluble polymer components, thereby controlling the viscosity of the entire ink composition.

The ink composition of the writing instrument (100) according to the invention contains 1-3% by weight of triethanolamine. The triethanolamine functions as a stabilizer or neutralizer and is used to improve ink aggregation and dispersibility.

The ink composition of the writing instrument (100) according to the present invention contains 1-5% by weight of sodium lauryl sulfate. Said sodium lauryl sulfate is used as a surfactant.

The ink composition of the writing instrument (100) according to the present invention consists of ionized water. The ionized water functions as a solvent for the constituent components.

Such an ink composition is manufactured in a conventional manner and filled into the ink containing tube (130). The ink composition allows the user to easily erase the content written on the writing object (P).

A writing instrument (100) according to the present invention includes a tip erasing body (200) that allows for simple and easy erasing of content written on a writing object (P).

The writing instrument (100) has a cylindrical housing (110) on the outside, and a lower body (112) formed in the front to be narrowed and inclined at the center. 112) forms an upper body (111) that is assembled in a screw fastening manner. It is desirable to assemble and use a rubber pad (120) around the lower body (112) in order to prevent slippage and improve touch feeling when a user grips it with his/her hand to perform writing work. The writing instrument (100) has a knock cap (150) operated by a push button at the rear.

The housing (110) includes an ink containing tube (130) containing ink for writing, and the tip of the ink containing tube (130) forms a metal ballpoint pen tip (140). ing. A spring (160) is inserted just outside the ballpoint tip (140), and the spring (160) pushes the ballpoint tip (140) into the lower body (112) by pushing the knock cap (150). The ballpoint pen tip (140) is either exposed to the outside through the entrance (113) of the ballpoint pen tip (140).

A writing instrument (100) according to the present invention includes a tip erasing body (200) that allows for simple and easy erasing of content written on a writing object (P). The tip eraser (200) preferably forms part or all of the lower body (112).

The tip erasing body (200) is formed in the lower body (112) forming the entrance (113) to erase characters (W) written on the surface of the writing object (P). It is The ball-point pen tip (140) moves in and out through the entrance (113). The tip erasing body (200) is present at the position where the entrance (113) is formed, and is technically formed at the position where the ballpoint pen tip (140) enters and exits in the vertical direction.

The tip erasing body (200) forms part of the body of the writing instrument (100), and forms the front of the writing instrument (100), more specifically, the entrance (113) of the lower body (112). However, it is more desirable that the ballpoint pen tip (140) is wrapped around the outer periphery.

It is preferable that the tip erasing body (200) forms a part or all of the lower body (112) and has a rounded shape at a corner (R) between the end surface and the side surface. The rounded shape of the corner (R) is formed by placing the writing instrument (100) on the paper while being inclined at a certain angle as shown in FIGS. When pressing the (W) part, such as a character written on the paper, it will substantially contact the paper. Therefore, the corner (R) between the end face and the side face of the lower body (112) must be rounded to prevent the paper from being severely damaged during the erasing process.

The size of the corner round (R) is suitably between 0.5 and 1.5 mm, and preferably can be set to 0.75 mm. If the dimension of the corner round (R) is less than 0.5mm, the paper is more likely to be damaged. There are cons.

Thus, in the present invention, the tip erasing body (200) forms part or all of the lower body (112) of the writing instrument (100), and the ballpoint pen tip (112) of the writing instrument lower body (112) 140) are in close proximity to each other.

When the tip erasing body (200) is formed in the vicinity of the ball-point pen tip (140) of the lower body (112), a person using the writing instrument (100) of the present invention can erase the already written part. When trying to erase, the user can perform the erasing work while holding the writing instrument (100) of the present invention.

In the present invention, in the case of the tip erasing body (200), it is primarily formed of a synthetic resin material mainly composed of polypropylene resin because it forms part or all of the main body of the writing instrument (100). Therefore, the strength of the main body of the writing instrument must be maintained, and secondarily, the strength must be such that the written content to be deleted can be removed from the surface of the writing object. Second, it must be able to provide a predetermined surface roughness for the writing content to be erased on the surface of the writing object and maintain the surface roughness.

The tip erasing body (200) is mainly used for erasing the contents of writing written by the user by mistake, and its material is mainly made of polypropylene resin. 5 to 10 parts by weight of block copolymer; 5 to 10 parts by weight of hydrotrited heavy paraffinic; 0.2 to 0.5 parts by weight of antioxidant 1,2,3 benzotriazole; Contains polypropylene resin.

The tip erasable body (200) is mainly made of polypropylene resin. Since the tip erasing body (200) primarily forms part or all of the lower body of the writing instrument (100) as described above, it must maintain the strength of the writing instrument body. Secondly, it must have the strength to allow the written content to come out of the surface of the writing object, and thirdly, it must have the contact surface roughness for the written content to be erased. . The polypropylene resin is used to provide such functions.

Unlike the conventional elastomer eraser, the tip eraser (200) is not worn out even after several times of erasing work, and always maintains the initial shape, and the predetermined surface roughness is measured by an illuminometer. .5 Ra to 3 Ra range will continue to be maintained. When the tip eraser (200) maintains the range of surface roughness as described above, it is adapted to effectively erase written content.

The tip erasing body (200) contains 5 to 10 parts by weight of a hydrogenated styrene-isoprene-butadiene block copolymer with respect to the total weight. The hydrogenated styrene-isoprene-butadiene block copolymer provides a certain flexibility to the tip-erasing body (200).

The hydrogenated styrene-isoprene-butadiene block copolymer is a compound obtained by copolymerizing a styrene component and a butadiene component with each other, and has a double bond structure inside the polymer, making it strong and firm. By imparting relatively flexibility to the polypropylene main component, it provides the function of eliminating the drawback of being easily crushed or broken due to external impact.

When the hydrogenated styrene-isoprene-butadiene block copolymer is contained in 5 parts by weight or less, the flexibility thereof is weak. If so, it weakens the strength of the tip erasing body (200), which is not desirable.

The tip erasing body (200) contains 5 to 10 parts by weight of hydrotrited heavy paraffinic with respect to the total weight. The hydrotrited heavy paraffinic provides a predetermined contact surface roughness to the tip eraser (200).

This is because the hydrotrited heavy paraffinic component is included, so that the tip erasing body (200) is in close contact with the written content to be erased, and when it is pressed and moved in the left-right direction, To allow written contents to come out from the surface of an object to be written without slipping.

When the hydrotrited heavy paraffinic component is less than 5 parts by weight, the surface roughness of the tip erasing body (200) is less than 1.5 Ra, which makes it difficult to smoothly remove written contents. On the other hand, when the hydrotrited heavy paraffinic component is 10 parts by weight or more, the surface roughness of the tip erasing body (200) becomes 3.0 Ra or more, which is undesirable.

When the hydrotrited heavy paraffinic component is in the range of 5 to 10 parts by weight, when the user rubs the tip eraser (200) on the writing object, the so-called sticky feeling is felt. will provide.

Such a method can be said to be a method completely different from the technical idea of the conventional technology utilizing thermal deformation due to frictional heat.

The tip erasing body (200) contains 1, 2, 3 antioxidants and 0.2-0.5 parts by weight of benzotriazole with respect to the total weight. 1, 2, 3, and benzoltriazole function as antioxidants. When the antioxidant is used in an amount of less than 0.2 parts by weight, the anti-oxidation function cannot be properly performed. It does not rise, so it is undesirable to include more.

While the ball-point pen tip (140) enters and exits the writing instrument through the entrance (113), the ball-point pen tip (140) contacts the tip erasing body (200) wrapped around its outer periphery. In this case, the metal component of the ballpoint pen tip (140) may oxidize the tip eraser (200). In order to prevent such an oxidation reaction, the 1,2,3 benzoltriazole is used as an antioxidant.

The tip erasing body (200) is desirably composed of the polypropylene for the rest of the total weight. The polypropylene is necessary to maintain the strength of the tip eraser (200). Generally, it is present in the range of 80 to 90 parts by weight based on the total weight, but may vary slightly between the lower and upper ranges depending on the content of each component listed above.

When the tip erasing body 200 is intended to give a corresponding or distinct color to the body of the writing instrument, 0.002 to 0.02 parts by weight of a pigment pigment may be added with respect to the total weight. Said pigment pigments impart color and are commonly used in the art.

In addition, the present invention provides a method of erasing written content using the writing instrument (100).
The method of erasing written content according to the present invention is as follows.

The method of erasing written content according to the present invention is the first step (S210) in which the user writes or expresses the written content (W) on the surface of the writing object (P) using the writing implement (100) according to his/her intention. ).

In the first step (S210), the user holds the writing instrument in his or her hand and writes or draws the intended content on the surface of the object to be written. or any other form of expression. The step of writing the written content (S210) proceeds in the same manner as in the conventional method.

A method for erasing written content according to the present invention includes a second step (S220) in which a user puts a ballpoint pen tip (140) of the writing instrument inside the main body of the writing instrument. The second step (S220) can be said to be a step of storing the ball-point pen tip .

The second step (S220) is an essential step that must be performed when the user wants to erase the written content. The user pulls the ball-point pen tip (140) to the rear of the writing instrument by the elasticity of a spring (160) provided inside the writing instrument, so that the ball-point pen tip (140) does not protrude to the front end of the writing instrument. This is to prevent other characters or pictures from being written on the surface of the object to be written.

When proceeding to the next third step (S230) without proceeding to the second step (S220), there is a possibility that unintended writing content is written on the surface of the writing object by the ballpoint pen tip (140). Also, the third step (S230) cannot be smoothly performed.

From this point of view, the second step (S220) according to the present invention must be performed in the case of the present invention. sometimes not.

The method of erasing the written content according to the present invention is as follows: while the user is holding the writing instrument, the tip erasing body (200) is applied to the surface of the writing object (P), and the writing content to be erased is erased. It includes a third step of contacting (S230). The third step (S230) can be said to be a step of contacting the tip erasing body (200).

In the third step (S230), while the user is holding the writing instrument (100), the writing instrument (100) is erased at the original holding position without changing the position of the writing instrument (100). means to do work. In the case of conventional writing instruments, this is completely different from the act of the user always changing the position of the writing instrument back and forth and holding it again.

In the case of a conventional writing instrument, since an elastomer eraser is attached to the rear of the writing instrument, by gripping the conventional writing instrument while changing its position back and forth, the position of the elastomer eraser at the rear is changed to the front. However, in the case of the present invention, the front end erasing body (200) existing in the front of the main body of the writing instrument (100) can be used as it is.

In the third step (S230), while maintaining the gripped state of the writing instrument (100), it is applied to the surface of the writing object (P), and the writing content to be erased by the tip erasing body (200) come into contact with At this time, the tip erasing body (200) forms part or all of the lower body (112) of the writing instrument (100). When the tip erasing body (200) is positioned at the front of the lower body (112), the user does not turn the writing instrument (100) back and forth when performing the erasing work, and does not turn the writing instrument (100) over. This is because the work can be carried out while holding the writing instrument (100) as it is.

The method of erasing the written content according to the present invention includes a fourth step (S240) of erasing the written content by moving the tip erasing body (200) lightly on the surface of the writing object and reciprocating it in the horizontal direction. The fourth step (S240) can be said to be a kind of erasing step.

In the fourth step (S240), the user holds the writing instrument (100) with his/her hand and lightly presses the tip erasing body (200) toward the written content that the user wants to erase. This is for causing friction by bringing the tip erasing body (200) and the writing contents to be erased into contact with each other. In this case, the tip erasing body (200) does not use an elastomer eraser unlike the conventional one. The tip erasing body (200) has a surface roughness within the range of 1.5 Ra to 3 Ra.

In the fourth step (S240), the user presses the tip erasing body (200) lightly and reciprocates in the horizontal direction, thereby pushing out and removing the written contents from the surface of the writing object. The conventional method of removing written content is the same as rubbing an elastomer eraser to generate a friction temperature, discoloring the written content on the surface of the writing object due to the friction temperature, and discoloring the written content. It was an effective method.

On the other hand, according to the present invention, the tip erasing body (200) is brought into close contact with the writing content written on the surface of the writing object, and a close contact force is applied to remove the writing content from the surface. This method removes the written contents.

Therefore, in the fourth step (S240), even if the actions observed from the outside look the same, this is the difference between the present invention and the conventional prior art. They are completely different.

According to this feature of the present invention, it is not necessary to change the hand of the writing instrument back and forth when erasing the characters after writing on the paper using the writing instrument.

In addition, since the erasing operation can be performed by using the tip erasing body as the characters are written, the erasing operation is very convenient and can be performed quickly.

In addition, since the present invention does not require a separate eraser and uses a part of the body of the writing instrument, there is no need to worry about losing the eraser.

Although the writing instrument for erasing characters and the method for using the same according to the present invention have been specifically presented above, they are only embodied in the process of describing the embodiments of the present invention, and all the features of the present invention are described above. It should not be construed as being limited to apply only to the items listed.

Also, anyone skilled in the art can make various modifications and imitations according to the description of the specification of the present invention, but it is clear that this is not beyond the scope of the present invention.

100 writing instrument 110 housing 130 ink containing tube 140 ballpoint pen tip
150 knock cap 160 spring 200 tip erasing body P writing object W writing content

Claims (8)

A writing instrument capable of removing written content,
a housing (110) comprising a tubular shaped upper body (111) and a lower body (112) and a port (113); A tube (130), a ballpoint pen contact (140) present at the tip of the ink reservoir tube (130), a knock cap (150) located behind the housing (110), and the ballpoint pen contact (140). comprising a spring (160) actuated by elastic force;
The ink composition filled in the ink reservoir tube (130) includes 20 to 30% by weight of microencapsulated hysteresis microcapsule pigment, 1 to 3% by weight of styrene maleic anhydride monomethyl maleic acid polymer, and methyl stearin. 1-5% by weight of acid glycerin, 15-20% by weight of methylbehenate, 5-10% by weight of glycerin, 3-5% by weight of polyvinylpyrrolidone, 1-3% by weight of triethanolamine, and 1-2% by weight of sodium lauryl sulfate. % and the rest consists of ionized water,
The lower body (112) is partly or wholly formed of a tip eraser (200),
The tip erasing body (200) is present at a position where the ball-point pen touch (140) enters and exits, and is used for erasing the written contents erroneously written by the user. A writing instrument (100) capable of removing content. The material of the tip erasing body (200) is mainly composed of polypropylene, and includes 5 to 10 parts by weight of hydrogenated styrene-isoprene-butadiene block copolymer, 5 to 10 parts by weight of hydrotrited heavy paraffinic, 1, Writing implement (100) with removable writing according to claim 1, characterized in that it consists of 0.2-0.5 parts by weight of 2,3 benzotriazole and the rest of said polypropylene. said tip eraser (200) forming part or all of a lower body (112) of the housing (110);
The corner (R) present at the tip of the lower body (112) has a round shape,
A writing instrument (100) capable of removing written content according to claim 2, characterized in that the dimension of the round shape of the corner (R) is formed between 0.5 mm and 1.5 mm. . [Claim 4] The writing instrument (100) according to claim 3, wherein the tip erasing body (200) has a surface roughness ranging from 1.5 Ra to 3.0 Ra. [Claim 2] The tip erasing body (200) is capable of erasing writing according to claim 2, characterized in that 0.002 to 0.02 parts by weight of a pigment pigment is added to the total weight. Writing implement (100). a first step (S210) in which the user writes, draws, or expresses the written content (W) on the surface of the writing object (P) using a writing implement;
a second step (S220) in which the user stores the ballpoint pen tip of the ink storage tube (130) inside the main body of the writing instrument;
a third step (S230) in which the tip erasing body (200) is applied to the surface of the writing object (P) while the user is holding the writing instrument, and is brought into contact with the written content to be erased;
A fourth step (S240) of erasing the written content by reciprocating the tip erasing body (200) in the horizontal direction while lightly pressing it on the surface of the writing object (P). , how to erase written content. The ink composition filled in the ink containing tube (130) contains 20 to 30% by weight of microencapsulated hysteresis microcapsule pigment, 1 to 3% by weight of styrene maleic anhydride monomethylmalein polymer, and 1 to 1% of methyl stearate. 5% by weight, 15-20% methylbehenate, 5-10% by weight glycerin, 3-5% by weight polyvinylpyrrolidone, 1-3% by weight triethanolamine, 1-2% by weight sodium lauryl sulfate, and 7. A method of erasing writing according to claim 6, characterized in that the remainder consists of ionized water. The material of the tip erasing body (200) is mainly composed of polypropylene, and includes 5 to 10 parts by weight of hydrogenated styrene isofrene-butadiene block copolymer, 5 to 10 parts by weight of hydrotrited heavy parapinic, and 1 part by weight. 7. A method of erasing writing according to claim 6, characterized in that it consists of 0.2-0.5 parts by weight of 0.2-0.5 parts by weight of benzotriazole, 2,3, and the polypropylene.

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