JP6974509B2 - Stationery with an erasing tool - Google Patents

Description

The present invention relates to a writing instrument provided with an erasing instrument capable of erasing a writing line drawn with a ballpoint pen, a marking pen, a fountain pen, a pencil, a colored pencil, a heat-discoloring ink, or the like.

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

Japanese Unexamined Patent Publication No. 2009-107240

Therefore, it is an object of the present invention to provide a writing instrument provided with an erasing tool capable of erasing the handwriting regardless of the type of ink or the core of the writing instrument, whether it is the handwriting of the heat-discoloring ink or the handwriting of the pencil lead.

According to one aspect of the present invention, it has a first erasing member for erasing handwriting by heat-discoloring ink and a second erasing member for erasing handwriting of a type different from that of heat-discoloring ink. A writing tool equipped with an erasing tool characterized by the above is provided. The erasing of the handwriting mentioned here includes erasing and discoloration in the heat-discoloring ink.

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

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

Further, according to another aspect of the present invention, there is provided a writing tool 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 provided with an erasing tool capable of erasing the handwriting, regardless of the type of ink or the core of the writing instrument, whether it is the handwriting of a heat-discoloring ink or the handwriting of a pencil lead. That is, it is possible to erase the handwriting by various writing instruments containing a plurality of inks or cores.

It is a vertical sectional view of the writing instrument provided with the erasing instrument of 1st example in this invention. It is a vertical sectional view of the writing instrument provided with the erasing instrument of the 2nd example in this invention. It is an enlarged vertical sectional view of the rear part of the writing instrument provided with the erasing instrument of the second example in this invention. It is an enlarged vertical sectional view of the rear part which shows the use state of the writing instrument provided with the erasing instrument of 2nd example in this invention. It is an enlarged vertical sectional view of the rear part of the writing instrument provided with the erasing instrument of the third example in this invention. It is an enlarged vertical sectional view of the rear part which shows the use state of the writing instrument provided with the erasing instrument of the 3rd example in this invention. It is a vertical sectional view of the writing instrument provided with the erasing instrument of the 4th example in this invention. It is a vertical sectional view of the writing instrument provided with the erasing instrument of the 5th example in this invention.

Hereinafter, the explanation will be given with reference to the drawings.
FIG. 1 shows the form of a knock-type writing instrument which is the first example of the present invention. In this embodiment, as shown in the figure, the erasing tool 10 for heat-discoloring ink, which is the first erasing member integrated with the knock cover, is one knock-type erasing tool and is the second erasing member. The eraser 11 for the pencil lead is housed in the barrel 31. Since the width is not increased by using a single erasing tool having the same shape as a general writing instrument, it has the advantage of being easy to store in a writing instrument case or the like and having excellent portability. In this specification, the side on which the writing part protrudes is defined as the "front" side, and the side opposite to the writing part is defined as the "rear" side.

Here, the heat-discoloring ink maintains a predetermined color (first color) at room temperature (for example, 25 ° C.), and changes to another color (second color) when the temperature is raised to a predetermined temperature (for example, 60 ° C.). An ink that has the property of changing and then returning to its original color (first color) when cooled to a predetermined temperature (for example, −5 ° C.). In the heat-changing ink, making the second color colorless and raising the temperature of the drawn line written in the first color (for example, red) to make it colorless is referred to as "erasing" here. Therefore, in the following embodiment, the drawn lines are rubbed against the written paper surface or the like by an erasing tool for heat-coloring ink as a friction body to generate frictional heat, whereby the drawn lines are changed to colorless, that is, erased. As a matter of course, the second color may be colored other than colorless. Further, it may be an irreversible thermal discoloration ink as described in JP-A-2010-241867.

Further, as writing lines to be erased by the second erasing member in the present invention, not only a pencil lead but also a lead of a mechanical pencil and a handwriting with an ink that can be erased by scraping, which is not a thermal discoloration ink, are included. For example, the erasable ink refers to an ink containing at least water, non-thermoplastic colored resin particles, and non-colored particles.

When the rear end of the eraser 10 for thermal discoloration ink is knocked forward as an operation of pulling out the tip portion of the eraser 11 for the pencil lead from the barrel 31, the chuck body 34 and the fastener 35 move in conjunction with it. Move forward as one. Next, when the front end of the fastener 35 abuts on the rear end of the mouth plastic 32 and the advance is prevented, only the chuck body 34 advances further and the tapered portion 36 at the tip thereof expands. As a result, the erasing tool 11 for the pencil lead inserts the tip hole of the chuck body 34 by its own weight, and the tip of the erasing tool 11 for the pencil lead comes into contact with the rear end of the inner diameter portion 33 of the mouth plastic 32. By repeating such knocking, the erasing tool 11 for the pencil lead sequentially protrudes from the tip of the inner diameter portion 33 of the mouth plastic 32. Since such a mechanism is the same as a commonly known knock-type mechanical pencil, further explanation is omitted.

Further, the mouth plastic 32 is fixed to the tip of the barrel 31 by mutual screwing or the like. Further, the inner diameter portion 33 of the mouth plastic 32 is formed with protrusions, ribs, or the like at a portion that 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 mouth plastic 32 may be used as an erasing tool for heat-discoloring ink by forming the mouth plastic 32 with a material for an erasing tool for heat-discoloring ink, which will be described later. Thereby, it is possible to easily switch between the erasing tool for the pencil lead and the erasing tool for the heat-discoloring ink.

FIG. 2 is a compound writing tool which is a writing tool provided with the erasing tool of the second example in the present invention. In the compound writing instrument shown in FIG. 2, by pressing the knock cover 45 at the rear end forward, the cursive 41 is exposed from the tip of the barrel 31 and writing becomes possible, and the rear end of the clip 60 is the axis. The cursive 41 is housed in the barrel 31 by pressing. Specifically, this compound writing instrument includes a plurality of writing instruments 41 in a shaft cylinder 31, a guide cylinder 42 arranged in the shaft cylinder 31 and partitioning each of the writing bodies 41, and a length of the compound writing instrument. It has a pendulum 43 formed in a rod shape extending in the direction and arranged behind the cursive, a slide piece 44 attached to the rear end of the pendulum 43, and a knock cover 45. Then, the cursive 41 for obtaining the desired handwriting is selected by the pendulum 43 that follows gravity. That is, the user tilts the pendulum 43 by gravity by tilting the barrel 31 with respect to the vertical direction corresponding to the position of the desired cursive 41, and the tip of the pendulum 43 is behind the desired cursive 41. Align with the corresponding compartment of the guide tube 42 so that it faces the end. Next, the user knocks the knock cover 45 to advance the aligned pendulum 43 to press the desired cursive 41 so that the tip of the cursive 41 protrudes from the tip of the barrel 31. This compound writing instrument should be a writing instrument that can project or store the cursive with one hand and has an excellent design of the barrel as compared with the double writing instrument having an operation part protruding outward from the barrel. Can be done.

The plurality of cursives 41 housed in the barrel 31 of the compound writing instrument include at least one mechanical pencil and one or more ballpoint pens. The mechanical pencil contains a pencil lead, and the ballpoint pen is filled with heat-discoloring ink. Alternatively, the mechanical pencil may contain a thermal discoloration core having the same properties as the thermal discoloration ink, and the ballpoint pen may be filled with an eraser erasable ink. Alternatively, a mechanical pencil cursive 41 may be added to the barrel 31, and the lead thereof may be used as an erasing tool for a pencil lead or an erasing tool for heat-discoloring ink. Further, the writing body 41 may be a felt-tip pen body, a writing body, or the like.

FIG. 3 is an enlarged vertical sectional view of the rear part of the writing instrument provided with the erasing instrument of the second example in the present invention. The knock cover 45 at the rear end of the compound writing instrument can be used as the erasing tool 10 for the heat-discoloring ink, which is the first erasing member. Further, in the knock cover 45, a cylindrical erasing member holder 47 is detachably fitted into the tubular knock pipe 46 provided at the rear end of the shaft cylinder 31. The erasing member holder 47 is formed in a columnar shape and holds an erasing tool 11 for a pencil lead, which is a second erasing member. Therefore, the erasing tool 11 for the pencil lead can be attached to and detached from the knock pipe 46, that is, the shaft cylinder 31 via the erasing member holder 47. Therefore, the erasing tool 11 for the pencil lead 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 showing a usage state of the writing instrument provided with the erasing instrument of the second example in the present invention. When erasing the handwriting of the heat-discoloring ink, the handwriting is scraped by the knock cover 45, which is an erasing tool 10 for the heat-discoloring ink, to generate frictional heat and erase the ink. At this time, the knock cover 45 may be used in a state of being attached to the rear end portion of the shaft cylinder 31, or may be used in a state of being removed from the shaft cylinder 31 as a single unit.

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

In this embodiment, by forming the erasing tool held in the erasing member holder 47 with the material of the erasing tool 10 for the heat-discoloring ink, the erasing tool may be used as the erasing tool for the heat-discoloring ink, and the knock cover may be used. By forming 45 with the material of the erasing tool 11 for the pencil lead, it may be used as the erasing tool for the pencil lead.

FIG. 5 is an enlarged vertical sectional view of the rear part of the writing instrument provided with the erasing instrument of the third example in the present invention. The difference from the writing instrument provided with the erasing instrument of the second example is that the knock cover 45 is merely a cover member for preventing the erasing instrument from becoming dirty, and is not used as the erasing instrument. Instead, the erasing member holder 47 is formed of the material of the erasing tool 10 for the heat-discoloring ink, which is the first erasing member, and is used as the erasing tool 10 for the heat-discoloring ink.

FIG. 6 is an enlarged vertical sectional view of a rear part showing a usage state of the writing instrument provided with the erasing instrument of the third example in the present invention. When erasing the handwriting of the heat-discoloring ink, the erasing member holder 47, which is the erasing tool 10 for the heat-discoloring ink, is removed from the knock pipe 46, and the handwriting is scraped by the erasing member holder 47 to generate frictional heat for erasing. do.

On the other hand, when erasing the handwriting of 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 scratched and erased by the erasing tool 11 for the pencil lead. At this time, the erasing tool 11 for the 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 as a single unit.

In this embodiment, the erasing tool held in the erasing member holder 47 may be formed of the material of the erasing tool 10 for the heat-discoloring ink, so that the erasing tool may be used as the erasing tool for the heat-discoloring ink. By forming the holder 47 with the material of the erasing tool 11 for the pencil lead, it may be used as the erasing tool for the pencil lead.

FIG. 7 is a vertical cross-sectional view of a writing instrument provided with the erasing instrument of the fourth example in the present invention. FIG. 7A shows a state in which the cursive 51 such as a ballpoint pen is projected, and FIG. 7B shows a state in which the mechanical pencil cursive 52 is projected. A knock cover 45 that can be used as an erasing tool 10 for heat-discoloring ink, which is a first erasing member, is attached to the rear end of the compound writing instrument. In the knock cover 45, the erasing member holder 47 is fixedly attached to the rear end portion of the barrel 31. The erasing member holder 47 holds an erasing tool 11 for a pencil lead, which is a second erasing member. Therefore, the erasing tool 11 for the pencil lead is formed in a columnar shape and can be attached to and detached from the erasing member holder 47.

A writing body 51 such as a ballpoint pen filled with heat-discoloring ink or an eraser erasable ink and a mechanical pencil writing body 52 having a built-in pencil core or heat-discoloring core are housed in the shaft cylinder 31. ing. By integrally accommodating two or more types of cursive and two types of erasing instruments in one writing instrument, it is easy to store them in a writing instrument case or the like, and it is possible to make a writing instrument and an erasing instrument having excellent portability. The writing portion of the writing body such as a ballpoint pen may be a ballpoint pen, a felt-tip pen, a writing brush, or the like as long as it is a liquid ink.

As a cursive selection operation, when the clip 60 is rotated with respect to the barrel 31, one of the cursives is selected by the cam slope 54 accompanying the rotation of the cylindrical cam 53, and the writing tip is inserted from the tip of the mouth plastic 32. It is possible to make it protrude. When the selected cursive is a mechanical pencil cursive 52, the rear end of the eraser 10 for thermal discoloration ink is knocked to extend the core.

When erasing the handwriting of a pencil lead or the like, the eraser 10 for thermal discoloration ink, which is the knock cover 45, is removed and the eraser 11 for the pencil lead is used. Further, the erasing tool 10 for the heat-discoloring ink can be used in a state of being attached to the writing tool or in a state of being removed alone.

FIG. 8 is a vertical cross-sectional view of a writing instrument provided with the erasing instrument of the fifth example in the present invention. FIG. 8A shows a state in which the cursive 51 such as a ballpoint pen is projected, and FIG. 8B shows a state in which the mechanical pencil cursive 52 is projected. The difference from the fourth example is that the erasing tool 10 for thermal discoloration ink, which is the knock cover 45, and the erasing tool 11 for the pencil lead are integrally configured by two-color molding, adhesion, etc., with respect to the erasing member holder 47. The point is that it is removable. A plurality of ribs are formed in the axial direction on the inner surface of the erasing member holder 47 that fits with the erasing tool 11 for the pencil lead, and even if the rear end side of the writing instrument is directed vertically downward, the pencil lead can be used. The eraser 11 is designed so that it does not fall off.

In the fourth and fifth examples, the erasing tool held in the erasing member holder 47 may be used as an erasing tool for the heat-discoloring ink by forming the erasing tool 10 for the heat-discoloring ink. Often, the knock cover 45 may be used as an erasing tool for a pencil lead by forming the knock cover 45 with the material of the erasing tool 11 for a pencil lead.

According to the above-described embodiment of the present invention, the erasing tool is for erasing the writing line by the writing instrument, and the erasing tool has a first erasing member for erasing the writing line by liquid ink and a solid writing line. It is characterized in that the second erasing member to be erased is integrally configured. Thereby, it is possible to provide a writing instrument provided with an erasing instrument capable of erasing handwriting regardless of the type of ink or core of the writing instrument.

Further, the first erasing member and the second erasing member are characterized in that the durometer A hardness or the durometer D hardness defined in JIS K6253 are different from each other, so that the first erasing member and the second erasing member are different from each other at the time of erasing. It becomes easy to distinguish it from the erasing member of the above, and it can be easily used properly.

As the erasing tool for the thermosetting ink, a material having rubber elasticity, a soft plastic, and a semi-hard plastic are selected, and various thermoplastic resins, thermosetting materials, thermoplastic materials, and sintered bodies of inorganic and organic substances are selected. It is desirable to construct by using at least one kind (each alone or a mixture of two or more kinds) such as. As the thermoplastic material that can be used as an erasing tool for the thermosetting ink, a thermoplastic elastomer such as an olefin-based, styrene-based, urethane-based, polyester-based, or fluorine-based material can be used, and as a thermosetting material. For example, various synthetic rubbers such as silicone-based, epoxy-based, urethane-based, melamine-based, urea-based, and phenol-based rubbers and natural rubbers can be used. Further, it is composed of a mixture of polypropylene resin and styrene-based thermoplastic elastomer, or a mixture of polypropylene resin and polypropylene-based thermoplastic elastomer, and the blending ratio thereof is 1: 1 to 1: 4 by weight, more preferably olefin-based resin. A mixture of olefin-based thermoplastic elastomers having a blending ratio of 1: 2.5 to 1: 3.5 by weight is easy to generate frictional heat when erasing the brush stroke, and self-wearing occurs. It is especially desirable because it will be less.

The eraser for the pencil lead is made of a vinyl chloride resin-based vinyl chloride eraser, a styrene-based thermoplastic elastomer, or an olefin-based thermoplastic elastomer used in an eraser that meets the requirements described in JIS S6050 3.2. Non-PVC eraser and eraser made of natural rubber are selected.

The shape and the like of each erasing tool of the present invention is not particularly limited, and may be, for example, a columnar shape, a prismatic shape, a triangular columnar shape, a rectangular parallelepiped, or a complicated shape having irregularities or protrusions on the surface. However, it is desirable to integrally form a corner portion that can be contacted in a dot shape and an end portion that can be contacted in a planar shape.

In addition, the first erasing member and the second erasing member of the present invention contain a coloring agent, a fragrance, or the like in the above materials to the extent that the effects of the present invention are not impaired, thereby improving decorativeness and distinctiveness. In addition, a heat-discoloring material may be contained to enable discoloration by frictional heat when the handwriting is erased.

As described above, the present invention is a writing instrument provided with an erasing instrument or an erasing instrument that can effectively erase handwriting with a writing instrument using a solid core such as a pencil or writing instrument with a heat-discoloring ink, and can be used industrially. It is a useful invention.

10 Erasing tool for heat-discoloring ink (first erasing member)
11 Eraser for pencil lead (second erasing member)
31 Cursive 32 Port plastic 33 Inner diameter 34 Chuck body 35 Fastener 36 Tapered part 41 Cursive 42 Guide tube 43 Pendulum 44 Slide piece 45 Knock cover 46 Knock pipe 47 Erasing member holder 51 Ballpoint pen etc. Cursive 52 Sharp pencil cursive 53 Cylindrical cam 54 cam slope

Claims (1)

A shaft tube, a cursive for handwriting with heat-discoloring ink, a cursive for handwriting of a different type from the heat-discoloring ink, a first erasing member for erasing the handwriting with the heat-discoloring ink, and the heat. A second erasing member for erasing a different type of handwriting from the discoloring ink is provided.
One of the first erasing member and the second erasing member is a knock cover attached to the rear end portion of the barrel so as to cover the other, and the knock cover is the rear end of the barrel. It is removable from the erasing member holder fixedly attached to the portion, and the other of the first erasing member and the second erasing member is formed in a columnar shape and held by the erasing member holder. writing tool having an erase device characterized in that is.

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