JP6290536B2 - Writing instrument with eraser - Google Patents

Description

  The present invention relates to a writing instrument including an erasing tool that can erase a writing line 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 that can erase handwriting with a commercially available eraser have been disclosed. However, when a commercially available eraser is used as an eraser that erases the handwriting by frictional heat, the handwriting cannot be erased efficiently. Therefore, a friction body made of a synthetic resin having elasticity at the erasing portion as in Patent Document 1 is disclosed. However, with the friction body disclosed in Patent Document 1, it is difficult to erase the handwriting of the thermochromic ink, but it is difficult to erase the handwriting of a conventional pencil lead or eraser erasable ink.

JP 2009-107240 A

  Accordingly, an object of the present invention is to provide a writing instrument provided with an erasing tool capable of erasing the handwriting regardless of the type of ink or lead of the writing instrument, regardless of the handwriting of the thermochromic ink or the pencil lead.

  According to one aspect of the present invention, the first erasing member for erasing the handwriting by the thermochromic ink and the second erasing member for erasing a handwriting of a type different from the thermochromic ink are provided. A writing instrument provided with an eraser characterized by the above is provided. Note that the erasing of the handwriting mentioned here includes erasing and discoloration in thermochromic ink.

  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 accommodated in the shaft cylinder.

  According to another aspect of the present invention, a writing instrument is provided in which the first erasing member and the second erasing member are integrally formed.

  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 is different from the durometer hardness of the second erasing member.

  ADVANTAGE OF THE INVENTION According to this invention, it can provide the writing instrument provided with the erasing tool which can erase a handwriting irrespective of the kind of ink of a writing instrument, and the kind of a lead, even if it is the handwriting of a thermochromic ink, and the handwriting of a pencil lead. That is, it is possible to erase handwriting by various writing tools that contain a plurality of inks or cores.

It is a longitudinal cross-sectional view of the writing instrument provided with the eraser of the 1st example in this invention. It is a longitudinal cross-sectional view of the writing instrument provided with the eraser of the 2nd example in this invention. It is an expansion longitudinal cross-sectional view of the rear part of the writing instrument provided with the eraser of the 2nd example in this invention. It is an expansion longitudinal cross-sectional view of the rear part which shows the use condition of the writing instrument provided with the eraser of the 2nd example in this invention. It is an expansion longitudinal cross-sectional view of the rear part of the writing instrument provided with the eraser of the 3rd example in this invention. It is an expansion longitudinal cross-sectional view of the rear part which shows the use condition of the writing instrument provided with the eraser of the 3rd example in this invention. It is a longitudinal cross-sectional view of the writing instrument provided with the eraser of the 4th example in this invention. It is a longitudinal cross-sectional view of the writing instrument provided with the eraser of the 5th example in this invention.

Hereinafter, description will be given with reference to the drawings.
FIG. 1 is a form of a knock type writing instrument which is a first example of the present invention. In the present embodiment, as shown in the drawing, the eraser 10 for thermochromic ink, which is a first erase member integrated with a knock cover, is a single knock eraser, and is a second erase member. The pencil lead erasing tool 11 is accommodated in the shaft tube 31. Since the width is not increased by using one erasing tool in the same form as a general writing instrument, there is an advantage that it can be easily stored in a writing instrument case or the like and is excellent in portability. In the present specification, the side from 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 thermochromic ink means that a predetermined color (first color) is maintained at room temperature (for example, 25 ° C.), and when the temperature is raised to a predetermined temperature (for example, 60 ° C.), the color changes to another color (second color). An ink having a property 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 in the first color (for example, red) to make it colorless is herein referred to as “erasing”. Accordingly, in the following embodiments, the heat is generated by rubbing against the paper surface or the like on which the drawn lines are written with a thermochromic ink erasing tool as a friction body, thereby changing the drawn lines to colorless, that is, erasing. Of course, the second color may be a color other than colorless. Moreover, it is good also as an irreversible thermochromic ink as described in Unexamined-Japanese-Patent No. 2010-241867.

  In addition, writing of the drawn line erased by the second erasing member in the present invention includes not only a pencil lead but also a pencil lead, and a handwriting by ink that can be erased by rubbing that is not thermal discoloration ink. For example, the erasable ink refers to an ink containing at least water, non-thermoplastic colored resin particles, and non-colored particles.

  When the leading end of the pencil lead erasing tool 11 is fed out from the barrel 31 and the rear end of the thermochromic ink erasing tool 10 is knocked and moved forward, the chuck body 34 and the fastener 35 are linked together. Move forward together. Next, when the front end of the fastener 35 comes into contact with the rear end of the mouth plate 32 and is prevented from moving forward, only the chuck body 34 is further advanced, and the tapered portion 36 at the tip thereof is expanded. As a result, the pencil erasing tool 11 passes through the tip hole of the chuck body 34 by its own weight, and the tip of the pencil wiping tool 11 comes into contact with the rear end of the inner diameter portion 33 of the mouthpiece 32. By repeating such knocking, the pencil lead eraser 11 sequentially protrudes from the tip of the inner diameter portion 33 of the mouthpiece 32. Since such a mechanism is the same as a commonly known knock-type mechanical pencil, further explanation is omitted.

  A mouth plug 32 is fixed to the tip of the shaft tube 31 by mutual screwing or the like. In addition, the inner diameter portion 33 of the mouthpiece 32 is formed with a protrusion or a rib or the like that frictionally engages the outer surface of the pencil lead eraser 11 and appropriately holds the pencil lead eraser 11. The mouth plug 32 may be used as a erasing tool for thermochromic ink by forming it with a material of a erasing tool for thermochromic ink described later. Thereby, it is possible to easily switch between the eraser for the pencil lead and the eraser for the thermochromic ink.

  FIG. 2 is a dual-type writing instrument that is a writing instrument provided with the eraser of the second example of the present invention. In the dual writing instrument shown in FIG. 2, by pressing the knock cover 45 at the rear end forward, the writing body 41 is exposed from the front end of the shaft tube 31 and writing is possible, and the rear end portion of the clip 60 is centered on the axis. The cursive body 41 is accommodated in the shaft cylinder 31 by being pressed. Specifically, the dual writing instrument includes a plurality of writing bodies 41 in the shaft cylinder 31, a guide cylinder 42 arranged in the shaft cylinder 31 and partitioning each of the writing bodies 41, and the longitudinal length of the compound writing instrument. The pendulum 43 is formed in a bar shape extending in the direction and is arranged behind the cursive body, a slide piece 44 attached to the rear end of the pendulum 43, and a knock cover 45. Then, the selection of the cursive body 41 for obtaining a desired handwriting is performed by the pendulum 43 driven by gravity. That is, the user inclines the pendulum 43 by gravity by tilting the shaft cylinder 31 with respect to the vertical direction according to the position of the desired writing body 41, and the tip of the pendulum 43 is behind the desired writing body 41. It aligns with the corresponding section of the guide tube 42 so as to face the end. Next, the user knocks the knock cover 45, advances the aligned pendulum 43, presses the desired writing body 41, and causes the tip of the writing body 41 to protrude from the tip of the shaft cylinder 31. This dual-type writing instrument is capable of projecting or storing the writing body with one hand, and is a writing instrument with superior design of the shaft cylinder compared to a dual-type writing instrument having an operation part protruding outward from the shaft cylinder. Can do.

  The plurality of writing bodies 41 accommodated in the shaft 31 of the compound writing instrument includes at least one mechanical pencil and one ballpoint pen. The mechanical pencil contains a pencil lead, and the ballpoint pen is filled with thermochromic ink. Alternatively, the mechanical pencil may contain a thermochromic core having the same properties as the thermochromic ink, and the ballpoint pen may be filled with an eraser erasable ink. Alternatively, a mechanical pencil 41 may be added to the shaft 31 and the lead may be used as a pencil lead eraser or a thermochromic ink eraser. Further, the writing body 41 may be a sign pen body, a brush body, or the like.

  FIG. 3 is an enlarged longitudinal sectional view of the rear part of the writing instrument provided with the eraser of the second example in the present invention. The knock cover 45 at the rear end of the dual-type writing instrument can be used as the erasing tool 10 for thermochromic ink, which is the first erasing member. Further, in the knock cover 45, a cylindrical erasing member holder 47 is detachably fitted to a cylindrical knock pipe 46 provided at the rear end portion of the shaft cylinder 31. The erasing member holder 47 is formed in a columnar shape and holds the erasing tool 11 for the pencil lead that is the second erasing member. Accordingly, the pencil erasing tool 11 can be attached to and detached from the knock pipe 46, that is, the shaft cylinder 31 via the erasing member holder 47. For this reason, the erasing tool 11 for the pencil lead does not damage the side surface when being attached to or detached from the knock pipe 46.

  FIG. 4 is an enlarged vertical cross-sectional view of the rear part showing the usage state of the writing instrument provided with the eraser of the second example in the present invention. When erasing the handwriting of the thermochromic ink, the handwriting is rubbed by the knock cover 45 which is the erasing tool 10 for the thermochromic ink to generate frictional heat and erase it. At this time, the knock cover 45 may be used in a state of being attached to the rear end portion of the shaft tube 31 or may be used in a state of being detached from the shaft tube 31.

  On the other hand, when erasing the pencil lead, the knock cover 45 is removed, and the pencil is erased by rubbing with the pencil lead eraser 11. 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 tube 31 or may be used in a single state removed from the shaft tube 31 together with the erasing member holder 47. Good.

  In this embodiment, the erasing tool held by the erasing member holder 47 is formed of the material of the erasing tool 10 for the thermochromic ink, so that it can be used as an erasing tool for the thermochromic ink. By forming 45 with the material of the eraser 11 for the pencil lead, it may be used as an eraser for the pencil lead.

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

  FIG. 6 is an enlarged vertical cross-sectional view of the rear portion showing the usage state of the writing instrument provided with the eraser of the third example in the present invention. 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 scraped with the erasing member holder 47 to generate frictional heat and erase. To do.

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

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

  FIG. 7 is a longitudinal sectional view of a writing instrument provided with the eraser of the fourth example in the present invention. FIG. 7A shows a state in which a writing body 51 such as a ballpoint pen is projected, and FIG. 7B shows a state in which a mechanical pencil writing body 52 is projected. A knock cover 45 that can be used as the eraser 10 for thermochromic ink, which is the first erase member, is attached to the rear end of the dual-type writing instrument. An erasing member holder 47 is fixedly attached to the rear end portion of the shaft cylinder 31 in the knock cover 45. The erasing member holder 47 holds the erasing tool 11 for the pencil lead that is the second erasing member. Therefore, the erasing tool 11 for the pencil lead is formed in a cylindrical shape and is detachable from the erasing member holder 47.

  The shaft tube 31 accommodates a writing body 51 such as a ballpoint pen that is filled with thermochromic ink or eraser erasable ink that is thermochromic, and a mechanical pencil writing body 52 that contains a pencil core or a thermochromic core. ing. By storing two or more types of writing bodies and two types of erasing tools together in one writing tool, the writing tools and the erasing tools can be easily stored in a writing tool case or the like and have excellent portability. In addition, the writing part in a writing body such as a ballpoint pen may be a ballpoint pen body, a sign pen body, a brush body or the like as long as it is 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 inclined surface 54 associated with the rotation of the cylindrical cam 53, and the writing tip is moved from the tip of the mouthpiece 32. It can be projected. Further, when the selected cursive is the mechanical pencil cursive 52, the rear end of the eraser 10 for the thermochromic ink is knocked and the lead is fed out.

  When erasing a handwriting such as a pencil lead, the eraser 10 for the thermochromic ink that is the knock cover 45 is removed and the eraser 11 for the pencil lead is used. The eraser 10 for thermochromic ink can be used either in a state where it is attached to a writing instrument or in a state where it is detached.

  FIG. 8 is a longitudinal sectional view of a writing instrument provided with the eraser of the fifth example of the present invention. FIG. 8A shows a state in which a writing body 51 such as a ballpoint pen is projected, and FIG. 8B shows a state in which a mechanical pencil writing body 52 is projected. The difference from the fourth example is that the eraser 10 for the thermochromic ink that is the knock cover 45 and the eraser 11 for the pencil lead are integrally formed by two-color molding, adhesion, etc. It is a point that can be detached. A plurality of ribs are formed in the axial direction on the inner surface of the erasing member holder 47 that engages with the pencil erasing tool 11. The erasing tool 11 is prevented from falling off.

  In the fourth and fifth examples, the erasing tool held by the erasing member holder 47 may be used as the erasing tool for the thermochromic ink by forming the erasing tool with the material of the erasing tool 10 for the thermochromic ink. The knock cover 45 may be formed of the material of the pencil lead eraser 11 and used as a pencil lead eraser.

  According to the embodiment of the present invention described above, an erasing tool for erasing a writing line by a writing instrument, wherein the erasing tool has a first erasing member for erasing the writing line by liquid ink and a solid writing line. The second erasing member to be erased is integrally formed. Thereby, 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 lead 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 is different from each other. Therefore, it is easy to distinguish them from the erasing member.

  The eraser for thermochromic ink is selected from rubber-elastic materials, soft plastics, and semi-rigid plastics. Various thermoplastic resins, thermosetting materials, thermoplastic materials, inorganic and organic sintered bodies It is desirable to constitute by using at least one kind (such as each alone or a mixture of two or more kinds). As a thermoplastic material that can be used as an eraser for thermochromic ink, thermoplastic elastomers such as olefin, styrene, urethane, polyester, and fluorine can be used, and as a thermosetting material. For example, various synthetic rubbers such as silicone, epoxy, urethane, melamine, urea, phenol, and natural rubber can be used. Furthermore, it consists of a mixture of a polypropylene resin and a styrene-based thermoplastic elastomer, or a mixture of a polypropylene resin and a polypropylene-based thermoplastic elastomer, and the blending ratio thereof is 1: 1 to 1: 4, more preferably, an olefin resin and A mixture of olefinic thermoplastic elastomers with a weight ratio of 1: 2.5 to 1: 3.5 is easy to generate frictional heat and eliminates self-wear when erasing handwriting. This is particularly desirable because it is less.

  Further, the pencil erasing tool is made of a vinyl chloride eraser made of a vinyl chloride resin, a styrene-based thermoplastic elastomer or an olefin-based thermoplastic elastomer, which is used in an eraser satisfying the matters described in JIS S6050 3.2 performance. Non-vinyl chloride eraser and eraser made of natural rubber are selected.

  In addition, the shape of each erasing tool of the present invention is not particularly limited, and may be, for example, a cylindrical shape, a prismatic shape, a triangular prism shape, a rectangular parallelepiped shape, or a complicated shape having irregularities and protrusions on the surface. However, it is desirable to form integrally the corner | angular part which can be contacted in dot shape, and the edge part which can be contacted in surface shape.

  In addition, the first erasing member and the second erasing member of the present invention can be improved in decorativeness and distinguishability by adding a colorant, a fragrance, etc. to the above material within a range not impairing the effects of the present invention. In addition, a thermochromic material may be further included so that the color can be changed by frictional heat at the time of erasing the handwriting.

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

10 Erase tool for thermochromic ink (first erase member)
11 Pencil lead eraser (second eraser)
31 Axle tube 32 Mouth plastic 33 Inner diameter portion 34 Chuck body 35 Fastener 36 Tapered portion 41 Writing body 42 Guide tube 43 Pendulum 44 Slide piece 45 Knock cover 46 Knock pipe 47 Erasing member holder 51 Ball pen or other writing body 52 Mechanical pencil writing body 53 Cylindrical cam 54 Cam slope

Claims (2)

A first erasing member for erasing the handwriting by the thermochromic ink, comprising: a handwriting for the handwriting by the thermochromic ink; and a handwriting for a handwriting of a different type from the thermochromic ink; A second erasing member for erasing a different type of handwriting from the ink ,
A writing instrument provided with an eraser, wherein the first erase member and the second erase member are integrally formed .   The writing instrument according to claim 1, wherein the durometer hardness of the first erasing member and the durometer hardness of the second erasing member are different.

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