JP6850075B2 - Writing implements - Google Patents

Description

The present invention relates to a writing instrument having a writing core capable of inducing and retaining ink supplied from a writing instrument shaft, and more particularly, a writing instrument of a type generally called a paint marker, an oil-based marker, a water-based marker, or an underline marker. Regarding.

Conventionally, writing instruments called paint markers, underline markers, etc. are widely used because they are provided with a wide writing core to enable wide line drawing and are excellent in marking visibility and workability. Has been done.
The writing core of a writing instrument such as a line marker is generally a rod-shaped bundle of synthetic resin fibers or the like, or a shaft body which is a writing instrument body by imparting a capillary action to a porous member such as a polymer sintered body. Writing is possible by deriving the ink supplied from the pen tip to the pen tip.

In addition, with the spread of writing instruments in which fluorescent ink is housed in the shaft body, which is the main body of the writing instrument, writing instruments with many structures and shapes that enable wide lines have been put on the market. It is possible to select a wide range of writing instruments according to the situation, and the workability is also comfortable.

The applicant discloses a writing instrument having a writing core that can guide and hold ink supplied from a shaft body that is the main body of the writing instrument, and that has a visible portion (window) at the pen tip that allows the writing direction to be visually recognized. (See, for example, Patent Document 1).
With this type of writing instrument, you can see the written characters from the visible part (window) of the pen tip, so you can draw a line only where you want to check without sticking out. Specifically, as shown in FIG. 5A, ink is stored in the ink storage body 161 in the shaft body 160 which is the main body of the writing instrument, and the pen body 162 composed of a fine writing core at one end and the other end It has a pen body 90 composed of a bold type writing core, and is configured to supply the ink of the ink storage body 161 to the pen body 162 and the pen body 90, respectively. Reference numerals 164 and 163 are caps that protect the pen body 162 and the pen body 90. Further, a pen body 90 made of a bold type writing core shown in FIGS. 5 (b) and 5 (c) is attached to the rear shaft 165.

The pen body 90 made of this bold type writing core has ink guiding portions 92 and 92 made of a substantially U-shaped porous member and a writing portion 93 on the outer periphery of a holding body 91 serving as a transparent supporting member. The core is attached. As shown in FIG. 5D, the holding body 91 is fitted with a writing core composed of an ink guiding portion 92, 92 and a substantially U-shaped porous member of the writing portion 93 on the outer peripheral surface thereof. A fitting groove 91b having a step portion 91a is formed, and fitting protrusions 91c and 91c for attaching to the fitting hole of the rear shaft of the writing instrument shown in FIG. 5A are formed on both side surface portions thereof. Has been done. In the pen body 90 of this embodiment, since the holding body 91 is a member having visibility made of a transparent resin or the like, the holding body 91 becomes a visible portion and the writing direction can be visually recognized.

In the pen body 90, the writing core having the ink guiding portions 92 and 92 and the writing portion 93 made of a substantially U-shaped porous member is attached to the holding body 91 by fitting, adhering, welding, or the like. It has been.

However, when attached with an adhesive, the writing core may float due to excessive application of the adhesive, or the writing core may be clogged, resulting in poor writing. When these defective products occur, there is a problem that it is necessary to sort and eliminate them. Further, if the width of the writing core in the lateral (width) direction is narrowed, it is necessary to control the application of the adhesive to a smaller extent, which causes a problem that stable application becomes difficult. On the other hand, if the adhesive is not applied, there is a problem that the writing core floats due to the pressing of the ink storage body (filling) built in the shaft body which is the main body of the writing instrument.

Japanese Unexamined Patent Publication No. 2000-52682 (Claims, paragraph 0014, FIG. 7, FIG. 24, FIG. 25, etc.)

The present invention has been made in view of the above-mentioned problems of the prior art and the current situation, and is intended to solve the problems. The writing core is securely fixed to the holder and assembled with a simple structure without using an adhesive or the like. It is an object of the present invention to provide a writing instrument that can be manufactured at low cost by stabilizing the process.

As a result of diligent studies to solve the above-mentioned conventional problems and the like, the present inventor has used a writing instrument having a writing core capable of inducing and retaining ink supplied from the writing instrument shaft. It was found that the writing instrument of the above-mentioned object can be obtained by attaching the writing instrument to the writing instrument shaft body and making a part of the holding body for fixing the writing core a specific structure, and completed the present invention.

That is, the present invention exists in the following (1) to (4).
(1) A writing instrument having a writing core capable of guiding and storing ink supplied from the writing instrument shaft, and the writing core is attached to the writing instrument shaft via a holding body and is one of the holding bodies. A writing instrument characterized by having a structure in which a writing core is fixed by deformation of a part.
(2) The writing tool according to (1) above, wherein the deformed portion is the rear part of the holding body.
(3) The writing instrument according to (1) or (2) above, wherein the width of the writing core is 3 mm or less.
(4) The writing tool according to any one of (1) to (3) above, wherein the holding body has a visible portion capable of visually recognizing the writing direction.

According to the present invention, there is provided a writing tool capable of reliably fixing a writing core to a holding body, stabilizing an assembly process, and manufacturing at low cost with a simple structure without using an adhesive.

An example of the embodiment of the writing instrument of the present invention is shown, where (a) is a plan view, (b) is a front view, and (c) is a vertical sectional view. (A) to (f) are drawings showing an example of a state in which a writing core is attached to a holding body, (a) is a plan view, (b) is a front view, and (c) is an XX line cross section. (D) is a left side view, (e) is a right side view, and (f) is a sectional view taken along line YY. (A) to (g) are drawings showing an example of a holding body, (a) is a perspective view seen from the front portion, (b) is a plan view, and (c) is a perspective view seen from the rear portion. , (D) is a left side view, (e) is a front view, (f) is a right side view, and (g) is a ZZ line sectional view. (A) to (e) are drawings showing the deformed portion of the holding body of FIG. 3, (a) is a plan view, (b) is a front view, and (c) is Z- in FIG. 3 (g). A line sectional view based on the Z-line sectional view, (d) is a left side view, and (e) is a right side view. An example of a conventional writing instrument is shown, (a) is a vertical sectional view, (b) is a partial front view showing a state in which a writing core is attached to a holding body, and (c) is a front view showing an example of a writing core. , (D) is a plan view of the holding body.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show an example of an embodiment of the writing instrument of the present invention, and FIGS. 1 (a) to 1 (c) are a plan view, a front view, and a vertical sectional view of the writing instrument, respectively. a) to (f) are drawings showing an example of a state in which the writing core is attached to the holder, and FIGS. 3 (a) to 3 (g) are drawings showing an example of the holder, FIG. 4 (a). )-(E) are drawings showing the deformed portion of the holding body.
As shown in FIG. 1, the writing instrument A of the present embodiment includes a shaft body 10 which is a writing instrument main body, an ink occlusion body 20, a writing core 30, a holding body 40, and a cap 50.

The shaft body 10 is formed of, for example, a thermoplastic resin, a thermosetting resin, or the like, and as shown in FIGS. 1 (a) to 1 (c), houses an ink occlusion body 20 impregnated with ink for writing instruments. It has a bottomed tubular rear shaft 11 and a tip shaft 15 to which a holding body 40 to which a writing core 30 serving as a pen tip is attached is fixed.
The rear shaft 11 is formed into a bottomed tubular shape using, for example, a resin made of PP or the like, and functions as a main body (shaft body) of a writing instrument. As shown in FIG. 1C, the rear shaft 11 is provided with a holding member 13 including holding pieces 12, 12 ... For holding the rear end portion of the ink storage body 20 inside the rear end side. The entire shaft and the toe shaft described later are molded to be opaque or transparent (and translucent), but any of them may be adopted from the viewpoint of appearance and practical use. Further, the front shaft 15 is fixed to the front side of the rear shaft 11 by fitting or the like.
The toe shaft 15 is provided with a convex fitting portion 16 for fixing the main body 41 of the holding body 40 for fixing the writing core 30, which will be described later. The leading shaft 15 of this structure is formed of, for example, a resin made of PP or the like.

The ink storage body 20 is impregnated with ink for writing tools such as water-based ink and oil-based ink. For example, natural fiber, animal hair fiber, polyacetal resin, acrylic resin, polyester resin, polyamide resin, and polyurethane resin are used. A fiber bundle composed of one or a combination of two or more kinds such as a resin, a polyolefin resin, a polyvinyl resin, a polycarbonate resin, a polyether resin, and a polyphenylene resin, a processed fiber bundle such as felt, and a sponge. , Resin particles, and porous materials such as sintered bodies. The ink storage body 20 is housed and held in the rear shaft 11 which is the main body of the shaft body 10.
The ink composition used is not particularly limited, and a suitable compounding formulation can be used depending on the use of the writing instrument. For example, in an underline pen or the like, the ink is a fluorescent dye, for example, Basic Violet 11, Basic Yellow 40. Etc. can be contained.

As shown in FIGS. 2A to 2F, the writing core 30 has a U-shaped shape as a whole, and the ink guiding portions 31 and 31 and the ink from the ink guiding portions 31 and 31 are applied. It is provided with a writing unit 32 to be derived.
The writing core 30 is composed of a porous member, and is, for example, a natural fiber, an animal hair fiber, a polyacetal resin, a polyethylene resin, an acrylic resin, a polyester resin, a polyamide resin, or a polyurethane resin. Process parallel fiber bundles consisting of one or more combinations of polyolefin resin, polyvinyl resin, polycarbonate resin, polyether resin, polyphenylene resin, etc., fiber bundles such as felt, or resin these fiber bundles. It is made of a processed fiber core or a porous body (sintered core) obtained by sintering various plastic powders.
The width of the writing core 30 is preferably 0.50 mm or more, particularly 1.00 to 3.00 mm, from the viewpoint of ensuring a sufficient writing flow rate. desirable.

The writing unit 32 has an inclined shape (knife-cut shape) so as to have an inclination that makes it easy to write, and this inclination or the like is appropriately set according to the usability of writing or the like. Further, the writing section 32 has a thick drawing line width (W), and a writing section having a drawing line width of 1 mm or more, more preferably a drawing line width of 2 mm or more is desirable.

As shown in FIGS. 2 (a) to 2 (f) and FIGS. 3 (a) to 3 (g), the holding body 40 fixes the writing core 30 and is fixed to the tip opening of the tip shaft 15 of the shaft body 10. It has a bulging main body 41, a flange 42 on the front side of the main body 41, and a visible portion 43 capable of visually recognizing the writing direction, and the main body 41 of the main body 41. On the rear side, a rear holding portion 45 having a holding piece 44 connected to the main body portion 41 is provided. Further, a holding groove 46 for fitting and holding the U-shaped writing core 30 is formed on the entire outer peripheral surface of the holding body 40 composed of these members in the longitudinal direction.
Further, a concave fitting portion 41a is formed on the outer peripheral surface in the width direction of the main body 41, and air flow grooves 41b and 41b are formed on the outer peripheral surface in the longitudinal direction.

The holder 40 configured in this way has visibility as a whole, and is generally made of a material having visibility and flexibility, for example, PP, PE, PET, PEN, nylon (6 nylon, 12 nylon, etc.). By molding from materials such as (including amorphous nylon, etc. in addition to nylon), acrylic, polymethylpentene, polystyrene, ABS, etc., the characters written in the writing direction can be effectively visually recognized in the visible portion 43. Become. In addition, only the visible portion 43 may be made of a material having visibility.
Further, the holding body 40 may be formed by using one type of each of the above materials, or two or more types of materials from the viewpoint of further improving durability and visibility, injection molding, blow molding and the like. It can be molded by various molding methods of.

In the writing tool A, when the writing core 30 is fitted into the holding groove 46, the bottom surface of the holding body 40 that comes into contact with the writing core 30 is provided with a smooth surface shape and an uneven shape. In the present embodiment, the lateral surface portions 47a and 47a of the holding groove 46, which are the portions of the writing core 30 that come into contact with the ink guiding portions 31 and 31, have a smooth surface shape, and the writing portion of the writing core 30. The front surface portion 47b of the holding groove 46, which is the portion that comes into contact with the 32, has a concave-convex-shaped surface portion 49 having a minute uneven step to prevent the writing portion 32 from being displaced during writing or the like and to ensure holding. Is formed.
In this writing instrument A, after the U-shaped writing core 30 is fitted into the holding groove 46, as shown in FIG. 2 (f), the upper portions of the holding pieces 44, 44 ... Of the rear holding portion 45 of the holding body 40. By deforming (caulking) the writing core 30 inward, the ink guiding portions 31, 31 of the writing core 30 can be fixed to the holding groove 46 by the holding pieces 44, 44 ... Provided above and below, whereby the writing core 30 can be fixed to the holding groove 46. It will be securely fixed in the holding groove 46 from the front side of the holding body 40. In this structure, the pull-out direction of the writing core 30 is the direction of the writing portion 32 which is opposite to the insertion (press-fitting) direction of the writing core 30, but the rear of the holder 40 where a force is particularly applied in the pull-out direction. By deforming (caulking) the upper portions of the holding pieces 44, 44 ... Provided in the above, it is possible to prevent the writing core 30 from coming off without using an adhesive or the like, and the writing core 30 is formed in the holding groove 46 of the holding body 40. It will be securely fixed. Since the main body 41 of the holding body 40 is not deformed, the holding body 40 is fixed to the front shaft 15 by fitting, and the dimensional stability is good, and the writing core 30 is securely fixed in the front shaft 15. The holder 40 can be fixed.
Further, in the present embodiment, the front surface portion 47b of the holding groove 46, which is a portion of the writing core 30 that comes into contact with the writing portion 32, is surely held by preventing the writing portion 32 from being displaced during writing or the like. Further, since the non-smooth surface portion 49 having an uneven shape is provided, the writing core 30 is surely fixed to the holding groove 46 of the holding body 40.

When the holding body 40 (FIG. 2) to which the writing core 30 is fixed is inserted into the front shaft 15, the concave fitting portion 41a of the holding body 40 fits into the convex fitting portion 16 of the front shaft 15. As a result, the writing core 30 is attached (fixed) to the writing instrument shaft 10 via the holding body 40, and the rear end portions 31a, 31a of the ink guiding portions 31, 31 of the writing core 30 are the ink storage bodies 20. It is configured to enter (press fit) inside the tip side. A recess may be formed inside the tip side of the ink storage body 20 in order to facilitate press-fitting of the rear end portions 31a, 31a of the ink guiding portions 31, 31. Further, when the pressure or the like in the shaft body 10 is increased, ink dripping or the like may occur from the writing core 30 serving as the pen tip, but in the writing instrument A of the present embodiment, the shaft is passed through the air flow groove 41b. The inside of the body 10 and the outside air are adjusted.
The cap 50 is detachably attached to the outer peripheral surface of the tip shaft 15 on the tip end side by fitting or the like.

In the writing instrument A according to the present invention, the ink storage body 20 that stores the ink for the writing instrument is inserted into the rear shaft 11 that constitutes the shaft body 10 of the writing instrument and is held, and the leading shaft 15 and the writing core 30 are fitted. A writing instrument can be easily written by partially deforming the 40, that is, by sequentially fixing the holding body 40 to which the writing core 30 is fixed by the deformation of the holding pieces 44, 44 ... Provided behind the holding body 40 by fitting or the like. A can be produced, and the ink stored in the ink storage body 20 is efficiently supplied to the writing portion 32 of the writing core 30 by the capillary force, and is used for writing and the like.

In the writing instrument A configured as described above, the writing core 30 is attached to the writing instrument shaft 10 via the holding body 40, and has a structure for fixing the writing core 30 by a partial deformation of the holding body 40. It is possible to obtain a writing instrument that can be manufactured at low cost by stabilizing the assembly process, as well as securely fixing the writing core to the holder with a simple structure without using an adhesive such as a hot melt type. Become.
In the conventional attachment with a hot melt type adhesive, the writing core may float due to excessive application of the hot melt type adhesive, deformation abnormality may occur due to insufficient heating and melting, or the width of the writing core is narrow, for example. If the width (t) is 3 mm or less, a small amount of hot-melt adhesive is applied, which makes stable application difficult. Furthermore, if the hot-melt adhesive is not applied, the shaft body becomes the writing tool body. There was a problem that the writing core floated due to the pressing of the ink storage body (filling) built in the container, but by fixing the writing core 30 by partially deforming the holding body 40, a hot melt type adhesive or the like Since the writing core can be reliably fixed to the holder with a simple structure without using the adhesive of the above, a writing tool that can be manufactured at low cost and stable in the assembly process is provided.
In the present invention, even when a writing core having a particularly narrow width (t) of 3 mm or less is used, the writing core 30 is ensured by deformation of the holding pieces 44, 44 ... Which are a part of the holding body 40. By fixing to, the writing core 30 is surely fixed to the holding groove 46 of the holding body 40 without using an adhesive such as a hot melt type.

Further, in the writing tool A of the present invention, as described above, since the holding body 40 to which the writing core 30 is fixed is made of a material having visibility, the visible portion 43 of the holding body 40 visually recognizes the writing direction. It is a visible part that can be provided, and it is possible to provide sufficient visibility that can reliably read characters written in the writing direction, and a writing tool that can be used until the end of writing is provided.

The writing tool of the present invention is not limited to the above-described embodiment and can be variously modified without changing the technical idea of the present invention.
For example, in the above embodiment, a part of the holding body 40 is deformed by deforming (caulking) the holding pieces 44, 44 ... It may be caulked to be transformed into.

Further, the configuration other than the writing core and the holding body, which is the gist of the present invention, is not particularly limited, and various changes can be made without changing the technical idea of the present invention.
For example, in the above embodiment, the writing instrument of the method (filling type) in which the ink stored in the ink storage body 20 is efficiently supplied to the writing portion 32 of the writing core 30 by the capillary force is shown, but the writing instrument is provided with a valve mechanism. A writing instrument, for example, an ink chamber in which ink is directly stored in the shaft body of the writing instrument is provided, a valve mechanism is provided between the ink chamber and the writing core, and a spring of the valve mechanism is attached by pressing movement in the direction of the pen tip. It may be a writing instrument having a structure in which the valve rod is retracted against the force to release the valve portion to derive ink and supply ink to the writing core.

In the above embodiment, a non-smooth surface portion 49 having an uneven shape is formed on the surface portion 47b of the holding body 40 in contact with the writing portion of the writing core 30 in order to prevent misalignment during writing. It does not have to be, and this uneven shape may be a satin-finished shape. As a method of forming a satin finish, for example, it can be formed by embossing (etching) on a molding die, electric discharge machining, or lorette machining by cutting, and from the viewpoint of quality stability and cost due to mass production, It is desirable to emboss (etch) the molding die.
Further, in the above embodiment, a single type writing instrument having one writing core 30 as a pen tip is mentioned, but a twin type writing instrument and a pen body composed of a fine writing type writing core are provided at the tip of the rear shaft to store ink. The ink of the body 20 may be supplied to the pen body.
Furthermore, in the above embodiment, although the ink for writing utensils has been described, a liquid material such as a liquid cosmetic, a liquid chemical, a coating liquid, and a correction fluid is used, and the writing core is combined with the liquid material, for example, a suitable coating member. May be used.

Next, the present invention will be described in more detail by way of examples, but the present invention is not limited to the following examples.

[Example 1]
Writing tools and inks conforming to the following configurations and FIGS. 1 to 4 were used. The dimensions of the writing core, holder, etc. were as shown below.

(Structure of writing core 30)
PE sintered core, porosity 60%, writing part: upper side length 4 mm, lower side length 5 mm, height 2 mm, knife-cut shape, ink guide part: φ (t) 2 mm, length 16 mm, upper side length 4 mm , Bottom length 5 mm, height 2 mm
(Structure of holder 40)
Made of acrylic resin, visible light transmittance 85% [Reflectance was measured with a multi-light source spectrophotometer (MSC-5N) manufactured by Suga Test Instruments Co., Ltd., and used as the visible light transmittance. ]
Size of visible part 43 (square) after attaching the writing core: 5 mm x 6 mm x 3 mm x 4 mm
The writing core 30 is fixed by deforming (caulking) the upper part height 2 mm of the holding piece 44 inward.

(Structure of writing instrument members other than writing core 30 and holder 40)
Ink occlusion body: PET fiber bundle, porosity 85%, φ6 x 77 mm
Writing tool body, cap: Made of polypropylene (PP)

(Ink composition)
As the ink, fluorescent peach ink having the following composition was used.
Color material: VC toner Peach (manufactured by Mikuni Color Co., Ltd.) 30 parts by mass Wetting agent: Glycerin 25 parts by mass Preservative: Bioace (manufactured by Keiai Kasei Co., Ltd.) 0.7 parts by mass Ion-exchanged water 44.3 parts by mass

In the writing tool of the first embodiment, the writing core 30 is attached to the writing tool shaft body 10 via the holding body 40, and the writing core is partially deformed by the holding body 40 and the holding pieces 44, 44 ... By fixing 30, it is possible to securely fix the writing core to the holder with a simple structure without using an adhesive such as a hot melt type, stabilize the assembly process, and manufacture at low cost. It was.
Further, when writing was performed on the characters using the obtained writing instrument, the appearance on the other side was visually confirmed through the visible portion 43 at the time of writing, and the visibility was sufficient, easy to see, and the writing direction. I was able to write while reading the letters written in.

Furthermore, this writing instrument is set in the automatic writing device, and according to JIS S6037, the writing angle is 65 °, the writing load is 1N, the speed is 7 cm / s, and the distance is 100 m. As a result of confirmation, it was found that the writing property was good, the drawn lines were not blurred, and the ink flow rate was also good.

The writing instrument of the present invention can be suitably used for a type of writing instrument called an underline pen, a paint marker, an oil-based marker, and a water-based marker.

A Writing implement 10 Axis body 11 Rear axis 15 Front axis 20 Ink occlusion body 30 Writing core 40 Retaining body 43 Visible part 44 Retaining piece 50 Cap

Claims (4)

A writing instrument having a writing core having a U-shaped writing portion capable of guiding and storing ink supplied from the writing instrument shaft, and the writing core has a visual portion capable of visually recognizing the writing direction. It is attached to the writing instrument shaft via the holding body, and the writing core is fixed by inwardly deforming the upper parts of two places located on the outer periphery of the holding piece provided behind the holding body whose deformation points are in the direction toward the shaft body. A writing instrument characterized by having a structure to be used. A writing instrument having a writing core having a U-shaped writing portion capable of guiding and storing ink supplied from the writing instrument shaft, and the writing core has a visual portion capable of visually recognizing the writing direction. It is attached to the writing instrument shaft via the holder, and has a structure in which the writing core is fixed by inward deformation at the end of the outer periphery of the visible portion located in front of the visible portion of the holder. A writing instrument featuring. The writing tool according to claim 1 or 2 , wherein a concave fitting portion is formed on the outer peripheral surface in the width direction of the holding body, and an air flow groove is formed on the outer peripheral surface in the longitudinal direction. The writing instrument according to any one of claims 1 to 3, wherein a minute uneven-shaped surface portion is formed on the front surface portion of the holding body that comes into contact with the writing portion of the writing core.

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