JP7303275B2 - Writing instrument with eraser - Google Patents

Description

The present invention relates to a writing instrument having an erasing instrument capable of erasing lines drawn with a ballpoint pen, a marking pen, a fountain pen, a pencil, a colored pencil, a thermochromic ink, or the like.

Conventionally, many erasers have been disclosed that can erase handwriting with a commercially available eraser. However, when a commercially available eraser is used as an erasing tool for erasing handwriting by frictional heat, handwriting cannot be erased efficiently. In view of this, Patent Document 1 discloses a friction body in which an erasing portion is made of a synthetic resin having elasticity. However, with the friction body of Patent Document 1, it is easy to erase the handwriting of the thermochromic ink, but it is difficult to erase the handwriting of the conventional pencil lead or eraser-erasable ink.

JP 2009-107240 A

Therefore, it is an object of the present invention to provide a writing utensil equipped with an erasing tool capable of erasing handwriting regardless of the type of ink or lead of the writing instrument, whether it is the handwriting of thermochromic ink or the handwriting of a pencil lead.

According to one aspect of the present invention, having a first erasing member for erasing handwriting with thermochromic ink and a second erasing member for erasing a type of handwriting different from thermochromic ink. There is provided a writing instrument with an erasing instrument characterized by: It should be noted that erasing handwriting mentioned here includes erasing and discoloration of thermochromic ink.

Further, according to another aspect of the present invention, there is provided a writing instrument characterized by housing a first erasing member and a second erasing member in a barrel.

Further, according to another aspect of the present invention, there is provided a writing instrument characterized in that the first erasing member and the second erasing member are integrally constructed.

According to another aspect of the present invention, there is provided a writing instrument characterized in that the durometer hardness of the first erasing member and the durometer hardness of the second erasing member are different.

According to the present invention, it is possible to provide a writing instrument equipped with an erasing tool capable of erasing handwriting regardless of the type of ink or lead of the writing instrument, whether it is handwriting of thermochromic ink or handwriting of a pencil lead. That is, it is possible to erase handwriting with a variety of writing instruments containing multiple inks or lead.

1 is a vertical cross-sectional view of a writing instrument provided with an erasing instrument of a first example in the present invention; FIG. FIG. 4 is a vertical cross-sectional view of a writing instrument provided with an erasing instrument of a second example according to the present invention; FIG. 10 is an enlarged vertical cross-sectional view of the rear portion of the writing instrument provided with the erasing instrument of the second example of the present invention; FIG. 11 is an enlarged vertical cross-sectional view of the rear portion of the writing instrument having the erasing tool of the second example of the present invention, showing the usage state; FIG. 11 is an enlarged vertical cross-sectional view of the rear portion of a writing instrument having an erasing tool of a third example of the present invention; FIG. 11 is an enlarged vertical cross-sectional view of the rear portion of the writing instrument having the erasing tool of the third example of the present invention, showing the usage state; FIG. 10 is a vertical cross-sectional view of a writing instrument provided with an erasing instrument of a fourth example of the present invention; FIG. 10 is a vertical cross-sectional view of a writing instrument provided with an erasing instrument of a fifth example of the present invention;

The following description will be made with reference to the drawings.
FIG. 1 shows the form of a knock-type writing instrument that is a first example of the present invention. In this embodiment, as shown in the figure, an erasing tool 10 for thermochromic ink, which is a first erasing member integrated with a knock cover, is a single knock-type erasing tool and a second erasing member. The pencil lead erasing tool 11 is housed in the barrel 31 . Since a single erasing tool having the same shape as a general writing tool does not increase the width, it can be easily stored in a writing tool case or the like, and has the advantage of being excellent in portability. In this specification, the side from which the writing section protrudes is defined as the "front" side, and the side opposite to the writing section is defined as the "rear" side.

Here, the thermochromic ink maintains a predetermined color (first color) at normal temperature (for example, 25° C.) and changes to another color (second color) when heated to a predetermined temperature (for example, 60° C.). It is an ink that changes and then returns to the original color (first color) when cooled to a predetermined temperature (for example, -5°C). In the thermochromic ink, making the second color colorless and raising the temperature of the drawn line written with the first color (eg, red) to make it colorless is referred to as "erasing" here. Therefore, in the following embodiments, the paper surface on which the drawn lines are written is rubbed by an erasing tool for thermochromic ink as a friction body to generate frictional heat, thereby changing the drawn lines to colorless, that is, erasing them. It should be noted that, as a matter of course, the second color may be colored other than colorless. Alternatively, an irreversible thermochromic ink as described in JP-A-2010-241867 may be used.

In addition, not only the lead of a pencil, but also the lead of a mechanical pencil, and the handwriting of an ink that can be erased by rubbing other than a thermochromic ink are included as a line to be erased by the second erasing member of the present invention. For example, an erasable ink is an ink containing at least water, non-thermoplastic colored resin particles, and non-colored particles.

When the rear end of the erasing tool 10 for thermochromic ink is pushed forward by knocking the front end of the erasing tool 11 for pencil lead out from the barrel 31, the chuck body 34 and the fastener 35 are interlocked therewith. Move forward together. Next, when the front end of the fastener 35 abuts against the rear end of the mouth puller 32 and is prevented from advancing, only the chuck body 34 advances further and the tapered portion 36 at the tip thereof expands. As a result, the eraser 11 for pencil lead is inserted through the tip hole of the chuck body 34 by its own weight, and the tip of the eraser 11 for pencil lead comes into contact with the rear end of the inner diameter portion 33 of the mouthpiece 32 . By repeating such knocking, the erasing tool 11 for pencil lead protrudes sequentially from the tip of the inner diameter portion 33 of the mouthpiece 32 . Since such a mechanism is the same as that of a commonly known knock-type mechanical pencil, further explanation is omitted.

A plug 32 is fixed to the tip of the barrel 31 by mutual screwing or the like. In addition, the inner diameter portion 33 of the mouthpiece 32 is formed with a projection, rib, or the like, which frictionally engages with the outer surface of the erasing tool 11 for the pencil lead and appropriately holds the erasing tool 11 for the pencil lead. The mouthpiece 32 may be used as an erasing tool for thermochromic ink by forming it from the material of the erasing tool for thermochromic ink, which will be described later. As a result, it is possible to easily switch between the erasing tool for pencil lead and the erasing tool for thermochromic ink.

FIG. 2 shows a compound writing instrument which is a writing instrument provided with an erasing instrument of the second example of the present invention. In the dual writing instrument shown in FIG. 2, by pushing forward the knock cover 45 at the rear end, the writing body 41 is exposed from the tip of the barrel 31 to enable writing, and the rear end of the clip 60 is positioned as the axis. The writing body 41 is accommodated in the shaft cylinder 31 by pressing the writing body 41 to the inside. Specifically, this compound writing instrument includes a plurality of writing bodies 41 in a barrel 31, a guide tube 42 arranged in the barrel 31 and arranged to partition each of the writing bodies 41, and a longitudinal direction of the compound writing instrument. It has a pendulum 43 formed in a bar shape extending in a direction and arranged behind the writing body, a slide piece 44 attached to the rear end of the pendulum 43, and a knock cover 45. - 特許庁A pendulum 43 driven by gravity is used to select a writing body 41 for obtaining a desired handwriting. That is, the user tilts the barrel 31 with respect to the vertical direction so that the tip of the pendulum 43 is tilted by gravity, and the tip of the pendulum 43 moves behind the desired writing body 41 . The ends are aligned with the corresponding sections of the guide tube 42 so as to face each other. Next, the user knocks the knock cover 45 to move the aligned pendulum 43 forward and press the desired writing body 41 to make the tip of the writing body 41 protrude from the tip of the barrel 31 . To make this compound writing instrument capable of projecting or retracting a writing body with one hand, and having an excellent design of a barrel as compared with a compound writing instrument having an operation part projecting outward from the barrel. can be done.

At least one mechanical pencil and at least one ballpoint pen are included in the plurality of writing bodies 41 accommodated in the barrel 31 of the dual writing instrument. A mechanical pencil contains a pencil lead, and a ballpoint pen is filled with thermochromic ink. Alternatively, the mechanical pencil may contain a thermochromic core having properties similar to the thermochromic ink, and the ballpoint pen may be filled with an eraser erasable ink. Alternatively, a writing body 41 of a mechanical pencil may be added in the barrel 31, and the core thereof may be used as an erasing tool for a pencil lead or an erasing tool for thermochromic ink. Furthermore, the cursive 41 may be a felt-tip pen, a brush, or the like.

FIG. 3 is an enlarged vertical cross-sectional view of the rear portion of a writing instrument provided with an erasing tool of a second example of the present invention. A knock cover 45 at the rear end of the compound writing instrument can be used as the erasing instrument 10 for thermochromic ink, which is the first erasing member. A tubular erasing member holder 47 is detachably fitted in a tubular knock pipe 46 provided at the rear end of the barrel 31 inside the knock cover 45 . The erasing member holder 47 is formed in a cylindrical shape and holds the erasing tool 11 for a pencil lead, which is the second erasing member. Therefore, the erasing tool 11 for pencil lead can be attached to and detached from the knock pipe 46 , that is, the barrel 31 via the erasing member holder 47 . Therefore, the pencil lead erasing tool 11 does not damage the side surface when it is attached to or detached from the knock pipe 46 .

FIG. 4 is an enlarged vertical cross-sectional view of the rear portion of the writing instrument having the erasing tool of the second example of the present invention, showing the state of use. When erasing the handwriting of the thermochromic ink, the knock cover 45, which is the erasing tool 10 for the thermochromic ink, rubs the handwriting to generate frictional heat to erase the handwriting. At this time, the knock cover 45 may be used while being attached to the rear end portion of the barrel 31, or may be used as a single unit removed from the barrel 31. As shown in FIG.

On the other hand, when erasing the handwriting on the pencil lead, the knock cover 45 is removed and the handwriting is erased by rubbing it with the eraser 11 for the pencil lead. At this time, the erasing tool 11 for pencil lead may be used in a state attached to the rear end portion of the barrel 31, or may be used in a single state removed from the barrel 31 together with the erasing member holder 47. good.

In this embodiment, the erasing tool held by the erasing member holder 47 may be formed of the material of the erasing tool 10 for thermochromic ink, and may be used as an erasing tool for thermochromic ink. By forming 45 from the material of the pencil lead erasing tool 11, it may be used as a pencil lead erasing tool.

FIG. 5 is an enlarged vertical cross-sectional view of the rear part of a writing instrument having an erasing tool of the third example of the present invention. The point different from the writing instrument provided with the erasing tool of the second example is that the knock cover 45 is a mere cover member for protecting the erasing tool from contamination, and is not used as an erasing tool. Instead, the erasing member holder 47 is used as the thermochromic ink erasing device 10 by forming it from the material of the first erasing member, the thermochromic ink erasing device 10 .

FIG. 6 is an enlarged vertical cross-sectional view of the rear portion of the writing instrument having the erasing tool of the third example of the present invention, showing the state of use. When erasing the handwriting of the thermochromic ink, the erasing member holder 47, which is the erasing tool 10 for the thermochromic ink, is removed from the knock pipe 46, and the handwriting is rubbed with the erasing member holder 47 to generate frictional heat to erase. do.

On the other hand, when erasing the handwriting on the pencil lead, the erasing tool 11 for the pencil lead is removed from the knock pipe 46 together with the erasing member holder 47, and the handwriting is erased by rubbing with the erasing tool 11 for the pencil lead. At this time, the erasing tool 11 for pencil lead may be used in a state of being attached to the erasing member holder 47, or may be used in a state of being removed from the erasing member holder 47 alone.

In this embodiment, the erasing tool held by the erasing member holder 47 may be formed of the material of the erasing tool 10 for thermochromic ink, and may be used as an erasing tool for thermochromic ink. By forming the holder 47 from the material of the pencil lead erasing tool 11, it may be used as a pencil lead erasing tool.

FIG. 7 is a vertical cross-sectional view of a writing instrument having an erasing tool of the fourth example of the present invention. FIG. 7(a) shows a state in which a writing body 51 such as a ballpoint pen is projected, and FIG. 7(b) shows a state in which a writing body 52 of a mechanical pencil is projected. A knock cover 45 is attached to the rear end of the compound writing instrument and can be used as the first erasing member, the erasing instrument 10 for thermochromic ink. An erasing member holder 47 is fixedly attached to the rear end of the barrel 31 inside the knock cover 45 . The erasing member holder 47 holds the erasing tool 11 for the pencil lead, which is the second erasing member. Accordingly, the erasing tool 11 for pencil lead is formed in a columnar shape and can be attached to and detached from the erasing member holder 47 .

Inside the shaft cylinder 31, a writing body 51 such as a ball-point pen filled with heat discoloring ink or erasable ink and a mechanical pencil writing body 52 containing a pencil lead or a heat discoloring lead are accommodated. ing. By integrally housing two or more types of writing bodies and two types of erasing tools in one writing instrument, the writing instrument and the erasing instrument can be easily stored in a writing instrument case or the like and excellent in portability. Note that the writing portion of a cursive body such as a ballpoint pen may be a ballpoint pen body, felt-tip pen body, brush body, or the like, as long as it is liquid ink.

When the clip 60 is rotated with respect to the barrel 31, any one of the cursive bodies is selected by the cam slope 54 accompanying the rotation of the cylindrical cam 53, and the tip of the cursive body is moved from the tip opening of the mouthpiece 32. It is possible to protrude. Also, when the selected writing body is the mechanical pencil writing body 52, the rear end of the erasing tool 10 for thermochromic ink is knocked to extend the lead.

When erasing the handwriting of a pencil lead, etc., the erasing tool 10 for the thermochromic ink, which is the knock cover 45, is removed and the erasing tool 11 for the pencil lead is used. Further, the erasing tool 10 for thermochromic ink can be used either attached to a writing instrument or as a single body removed from the writing instrument.

FIG. 8 is a vertical cross-sectional view of a writing instrument provided with an erasing tool of the fifth example of the present invention. FIG. 8(a) shows a state in which a writing body 51 such as a ballpoint pen is protruded, and FIG. 8(b) shows a state in which a mechanical pencil writing body 52 is protruded. The difference from the fourth example is that the erasing tool 10 for thermochromic ink, which is the knock cover 45, and the erasing tool 11 for pencil lead are integrally formed by two-color molding, adhesion, or the like, and are attached to the erasing member holder 47. The point is that it is detachable. In addition, a plurality of ribs are formed in the axial direction on the inner surface of the erasing member holder 47 to be fitted with the erasing tool 11 for the pencil lead. The erasing tool 11 is designed not to fall off.

In the fourth and fifth examples, the erasing tool held by the erasing member holder 47 may be formed of the material of the erasing tool 10 for thermochromic ink, so that it can be used as an erasing tool for thermochromic ink. By forming the knock cover 45 from the material of the pencil lead erasing tool 11, it may be used as a pencil lead erasing tool.

According to the above-described embodiment of the present invention, there is provided an erasing tool for erasing a writing line made by a writing instrument, the erasing tool comprising a first erasing member for erasing a writing line made by a liquid ink and a writing line made by a solid. The second erasing member for erasing is integrated with the second erasing member. As a result, it is possible to provide a writing instrument equipped with an erasing tool capable of erasing handwriting regardless of the type of ink or lead used in the writing instrument.

Further, the first erasing member and the second erasing member are characterized by having different durometer A hardness or durometer D hardness defined in JIS K6253. The erasing member can be easily distinguished from the other erasing member, and can be used properly.

Materials with rubber elasticity, soft plastics, and semi-rigid plastics are selected for erasing tools for thermochromic ink. It is desirable to configure by using at least one of (each alone or a mixture of two or more) such as. As a thermoplastic material that can be used as an erasing tool for thermochromic ink, thermoplastic elastomers such as olefin, styrene, urethane, polyester, and fluorine can be used. For example, various synthetic rubbers such as silicone-, epoxy-, urethane-, melamine-, urea-, and phenol-based rubbers and natural rubbers can be used. Furthermore, it is composed of a mixture of polypropylene resin and a styrene thermoplastic elastomer, or a mixture of a polypropylene resin and a polypropylene thermoplastic elastomer, in a weight ratio of 1:1 to 1:4, more preferably with an olefin resin. Composed of a mixture of olefinic thermoplastic elastomers and having a blending ratio of 1:2.5 to 1:3.5 by weight, when erasing handwriting, frictional heat is easily generated and self-wearing occurs. It is particularly desirable because it becomes less.

In addition, the erasing tool for the pencil core is a vinyl chloride eraser made of vinyl chloride resin, a styrene thermoplastic elastomer, or an olefin thermoplastic elastomer used in erasers that satisfy the items described in JIS S6050 3.2 performance. A non-vinyl eraser and a natural rubber eraser are selected.

The shape of each erasing tool of the present invention is not particularly limited. For example, it may be cylindrical, prismatic, triangular prismatic, rectangular parallelepiped, or a complicated shape having unevenness or projections on the surface. However, it is desirable to integrally form a corner portion that can be contacted in a point-like manner and an end portion that can be contacted in a plane-like manner.

Further, the first erasing member and the second erasing member of the present invention may contain a coloring agent, a fragrance, etc. in the above materials to improve decorativeness and distinguishability within a range that does not impair the effects of the present invention. Further, a thermochromic material may be included to enable color change by frictional heat when handwriting is erased.

As described above, the present invention is an erasing tool or a writing instrument equipped with an erasing tool that can effectively erase handwriting with a writing instrument with a solid lead such as a pencil or handwriting with a writing instrument with a thermochromic ink. It is a useful invention.

10 erasing tool for thermochromic ink (first erasing member)
11 Eraser for pencil lead (second erasing member)
31 Axle tube 32 Mouth plastic 33 Inner diameter part 34 Chuck body 35 Clamp 36 Taper part 41 Cursive body 42 Guide cylinder 43 Pendulum 44 Slide piece 45 Knock cover 46 Knock pipe 47 Erasing member holder 51 Cursive body such as ballpoint pen 52 Mechanical pencil cursive body 53 Cylindrical cam 54 Cam slope

Claims (2)

A barrel, a writing body for handwriting with thermochromic ink, a writing body for handwriting of a type different from the thermochromic ink, a first erasing member for erasing the handwriting with the thermochromic ink, and the heat a second erasing member for erasing a type of handwriting different from the discolored ink;
By tilting the barrel with respect to the vertical direction, the pendulum in the barrel is tilted by gravity, and the tip of the pendulum faces the desired rear end of the writing body, and the knock cover at the rear end of the barrel is moved forward. By pressing the pen, the writing body is exposed from the tip of the barrel and can be written, and the writing body is accommodated in the barrel by pressing the rear end of the clip on the side surface of the barrel to the axis,
A writing instrument equipped with an erasing tool, wherein one of the first erasing member and the second erasing member is a knock cover attached to the rear end of the barrel so as to cover the other. . A barrel, a writing body for handwriting with thermochromic ink, a writing body for handwriting of a type different from the thermochromic ink, a first erasing member for erasing the handwriting with the thermochromic ink, and the heat a second erasing member for erasing a type of handwriting different from the discolored ink;
A writing instrument equipped with an erasing tool, wherein one of the first erasing member and the second erasing member is a knock cover attached to the rear end of the barrel so as to cover the other. .

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