JP2017144581A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument which enables a writing core to be securely fastened to a holder by a simple structure without using an adhesive, such as a hot melt type adhesive, and enables stabilization of assembly process and manufacturing at low costs.SOLUTION: A writing instrument A has a writing core 30 which guides an ink supplied from a writing instrument shaft body 10 and retains the ink. The writing core 30 is attached to the writing instrument shaft body 10 through a holder 40. The writing instrument A has a structure that fixes the writing core 30 by deformation of a part of the holder 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a writing instrument having a writing core capable of guiding and retaining ink supplied from a writing instrument shaft, and more specifically, a writing instrument of the type generally referred to as a paint marker, an oil marker, an aqueous marker, or an underline marker. About.

Traditionally, writing tools called paint markers, underline markers, etc., have a wide writing core that enables wide line drawing and is widely used because of its excellent marking visibility and workability. Has been.
The writing core in a writing instrument such as a line marker is generally a shaft body that provides a capillary action to a porous member such as a synthetic resin fiber converged in a rod-like shape or a polymer sintered body, thereby forming a writing instrument body. The ink supplied from the printer can be written by deriving the ink to the pen tip.

  In addition, with the widespread use of writing instruments that contain fluorescent ink in the shaft, which is the main body of the writing instrument, writing instruments having many structures and shapes that enable wide drawing are commercially available. A wide selection of writing instruments can be selected, and the workability is also comfortable.

The present applicant discloses a writing instrument having a visible portion (window) that can visually recognize the writing direction at a pen tip in a writing instrument having a writing core that can guide and hold ink supplied from a shaft body serving as a writing instrument body. (For example, refer to Patent Document 1).
With this type of writing tool, you can see the written characters from the visible part (window) of the nib, so you can draw lines without sticking out only where you want to check. Specifically, as shown in FIG. 5A, ink is stored in the ink storage body 161 in the shaft body 160 serving as a writing instrument body, and a pen body 162 formed of a thin-type writing core at one end and the other end at the other end. It has a pen body 90 made of a bold type writing core and supplies ink of the ink occlusion body 161 to the pen body 162 and the pen body 90, respectively. Reference numerals 164 and 163 are caps for protecting the pen body 162 and the pen body 90. Further, a pen body 90 made of a bold type writing core shown in FIGS. 5B and 5C is attached to the rear shaft 165.

  The pen body 90 made of a bold type writing core has a writing portion 93 having ink guiding portions 92, 92 and a writing portion 93 made of a substantially U-shaped porous member on the outer periphery of a holding body 91 which is a transparent support member. A wick is attached. As shown in FIG. 5 (d), the holding body 91 is fitted with a writing core composed of a substantially U-shaped porous member of the ink guiding portions 92 and 92 and the writing portion 93 on its outer peripheral surface. A fitting groove 91b having a stepped portion 91a is formed, and fitting projections 91c and 91c for attaching to fitting holes on the rear shaft of the writing instrument shown in FIG. Has been. In the pen body 90 of this embodiment, since the holding body 91 is a visible member 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, 92 made of a substantially U-shaped porous member and the writing portion 93 is attached to the holding body 91 by fitting, bonding, welding or the like. It has been broken.

  However, the attachment with the adhesive may cause the writing core to float due to excessive application of the adhesive or the writing defect due to clogging of the writing core, etc. When these defective products are generated, there is a problem that an operation for sorting and eliminating them is required. Further, when the width of the writing core in the lateral (width) direction is narrowed, it is necessary to control the application of the adhesive further, so that there is a problem that stable application becomes difficult. On the other hand, when the adhesive is not applied, there is a problem that the writing core is lifted by the press of the ink occlusion body (batting) incorporated in the shaft body which is the writing instrument body.

JP 2000-52682 A (Claims, paragraph 0014, FIGS. 7, 24, 25, etc.)

  The present invention has been made in view of the above-mentioned problems and the present state of the art, and is intended to solve this problem, without using an adhesive or the like, and with a simple structure, the writing core is securely fixed to the holding body and assembled. An object is to provide a writing instrument that can be manufactured at a low cost and stabilized process.

  As a result of intensive studies to solve the above-described conventional problems, the inventor of the present invention has a writing core having a writing core that can guide and retain ink supplied from the writing instrument shaft. In addition, the present invention has been completed by finding that the above-mentioned writing instrument can be obtained by mounting the writing instrument on the shaft and setting a part of the holding body for fixing the writing core to a specific structure.

That is, the present invention resides in the following (1) to (4).
(1) A writing instrument having a writing core capable of guiding and retaining ink supplied from the writing instrument shaft, wherein the writing core is attached to the writing instrument shaft through a holding body and A writing instrument having a structure for fixing a writing core by deformation of a portion.
(2) The writing instrument according to (1), wherein the deformed portion is a rear portion of the holding body.
(3) The writing instrument as described in (1) or (2) above, wherein the width of the writing core is 3 mm or less.
(4) The writing instrument as described in any one of (1) to (3) above, wherein the holding body has a visible portion capable of visually recognizing a writing direction.

  ADVANTAGE OF THE INVENTION According to this invention, while using a simple structure without using an adhesive agent, while securing a writing core reliably to a holding body, the writing tool which can be manufactured by stabilization of an assembly process and low cost is provided.

An example of embodiment of the writing instrument of this invention is shown, (a) is a top view, (b) is a front view, (c) is a longitudinal cross-sectional view. (A)-(f) is each drawing which shows an example of the state which attached the writing core to the holding body, (a) is a top view, (b) is a front view, (c) is a XX cross section. (D) is a left side view, (e) is a right side view, and (f) is a cross-sectional view along line YY. (A)-(g) is each drawing which shows an example of a holding body, (a) is the perspective view seen from the front part, (b) is a top view, (c) is the perspective view seen from the back part. , (D) is a left side view, (e) is a front view, (f) is a right side view, and (g) is a sectional view taken along the line ZZ. (A)-(e) is each drawing which shows the deformation | transformation location of the holding body of FIG. 3, (a) is a top view, (b) is a front view, (c) is Z- of 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. It shows an example of a conventional writing instrument, (a) is a longitudinal sectional view, (b) is a partial front view showing a state where a writing core is attached to a holder, and (c) is a front view showing an example of a writing core. (D) It is a top view of a 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. FIGS. 1A to 1C are a plan view, a front view, and a longitudinal sectional view of the writing instrument, respectively. (a)-(f) is each drawing which shows an example of the state which attached the writing core to the holding body, FIG.3 (a)-(g) is each drawing which shows an example of a holding body, FIG. (E)-(e) is each drawing which shows the deformation | transformation location of a holding body.
As shown in FIG. 1, the writing instrument A of the present embodiment includes a shaft body 10, an ink occlusion body 20, a writing core 30, a holding body 40, and a cap 50 serving as a writing instrument body.

The shaft body 10 is formed of, for example, a thermoplastic resin, a thermosetting resin, or the like, and contains an ink occlusion body 20 impregnated with ink for a writing instrument, as shown in FIGS. A bottomed cylindrical rear shaft 11 and a front 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 cylindrical shape using, for example, a resin made of PP or the like, and functions as a main body (shaft body) of the 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 tip shaft described later are formed 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 front shaft 15 is provided with a convex fitting portion 16 for fixing a main body portion 41 of a holding body 40 for fixing a writing core 30 described later. The front shaft 15 having this structure is formed of, for example, a resin made of PP or the like.

The ink occlusion body 20 is impregnated with ink for writing instruments such as water-based ink and oil-based ink. For example, natural fibers, animal hair fibers, polyacetal resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins. Resin, polyolefin-based resin, polyvinyl-based resin, polycarbonate-based resin, polyether-based resin, polyphenylene-based resin or other fiber bundles, processed fiber bundles such as felt, and sponge , Including porous bodies such as resin particles and sintered bodies. The ink occlusion body 20 is accommodated and held in the rear shaft 11 which is a main body portion of the shaft body 10.
Moreover, the ink composition to be used is not particularly limited, and can be a suitable formulation according to the application of the writing instrument. For example, in an underline pen or the like, a fluorescent dye such as basic violet 11 or basic yellow 40 is used for the ink. Etc. can be contained.

As shown in FIGS. 2A to 2F, the writing core 30 has a U-shape as a whole, and the ink guiding portions 31 and 31 and ink from the ink guiding portions 31 and 31 are used. The writing part 32 to derive is provided.
The writing core 30 is composed of a porous member. For example, natural fibers, animal hair fibers, polyacetal resins, polyethylene resins, acrylic resins, polyester resins, polyamide resins, polyurethane resins, Processing fiber bundles such as parallel fiber bundles or felts made of one or a combination of two or more of polyolefin resins, polyvinyl resins, polycarbonate resins, polyether resins, polyphenylene resins, etc., or resin these fiber bundles It consists 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, in order to ensure a sufficient writing flow rate. desirable.

  The writing unit 32 has an inclined shape (knife cut shape) so that the writing is easy to write, and this inclination and the like are appropriately set according to the convenience of writing and the like. The writing part 32 has a large drawn line width (W), preferably a drawn part having a drawn line width of 1 mm or more, more preferably a drawn line width of 2 mm or more.

As shown in FIGS. 2 (a) to 2 (f) and FIGS. 3 (a) to 3 (g), the holding body 40 is fixed to the tip opening of the front shaft 15 of the shaft body 10 by fixing the writing core 30. The main body 41 has a bulging main body 41, a flange 42 on the front side of the main body 41, and a visible portion 43 that can visually recognize the writing direction. The rear holding part 45 which has the holding piece 44 connected with the said main-body part 41 on the back side is provided. A holding groove 46 for fitting and holding the U-shaped writing core 30 is formed on the entire outer circumferential surface in the longitudinal direction of the holding body 40 composed of these members.
A concave fitting portion 41a is formed on the outer circumferential surface of the main body 41 in the width direction, and air circulation grooves 41b and 41b are formed on the outer circumferential surface in the longitudinal direction.

The holding body 40 configured in this way has visibility as a whole, and a material having visibility and flexibility, such as PP, PE, PET, PEN, nylon (6 nylon, 12 nylon, etc.) Including non-nylon and other materials such as amorphous nylon), by forming from a material such as acrylic, polymethylpentene, polystyrene, ABS, etc., the characters written in the writing direction in the visible portion 43 can be effectively visually recognized. Become. In addition, you may comprise only the visible part 43 with the material which has visibility.
In addition, the holding body 40 may be configured by using one or more kinds of the above materials, or two or more kinds of materials from the viewpoint of further improving durability and visibility, and injection molding, blow molding, etc. It can shape | mold by these various shaping | molding methods.

In the writing instrument A, when the writing core 30 is inserted into the holding groove 46, the bottom surface of the holding body 40 that comes into contact with the writing core 30 has a smooth surface shape and an uneven shape. In the present embodiment, the side surface portions 47a and 47a of the holding groove 46, which are the portions that come into contact with the ink guiding portions 31 and 31 of the writing core 30, have a smooth surface shape, and the writing portion of the writing core 30 is also provided. The front surface portion 47b of the holding groove 46, which is a portion in contact with the groove 32, has a concavo-convex shape surface portion 49 having a small concavo-convex step for preventing misalignment of the writing portion 32 during writing and ensuring the 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) inwardly, 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 on the upper and lower sides. It is securely fixed in the holding groove 46 from the front side of the holding body 40. In this structure, the direction in which the writing core 30 is pulled out is the direction of the writing unit 32 which is the direction opposite to the direction in which the writing core 30 is inserted (press-fit). By deforming (caulking) the upper portions of the holding pieces 44, 44... Provided on the holding pieces 44, it is possible to prevent slipping without using an adhesive or the like. It will be securely fixed. Since the main body 41 of the holding pair 40 is not deformed, the fixing by fitting the holding body 40 to the front shaft 15 has good dimensional stability, and the writing core 30 is securely fixed in the front shaft 15. The holding body 40 can be fixed.
Further, in the present embodiment, the front surface portion 47b of the holding groove 46, which is a portion that comes into contact with the writing portion 32 of the writing core 30, is prevented from being misaligned when the writing portion 32 is written. Since the non-smooth surface portion 49 having a concavo-convex shape is provided, the writing core 30 is securely 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 41 a of the holding body 40 is fitted 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 body 10 via the holding body 40, and the rear side end portions 31 a and 31 a of the ink guiding portions 31 and 31 of the writing core 30 are formed on the ink storage body 20. It is configured to enter (press-fit) the inside of the tip side. In addition, in order to facilitate the press-fitting of the rear side end portions 31a and 31a of the ink guiding portions 31 and 31 inside the front end side of the ink occlusion body 20, a concave portion may be formed. In addition, when the pressure in the shaft body 10 increases, ink dripping or the like may occur from the writing core 30 serving as a pen tip. In the writing instrument A of the present embodiment, the shaft is interposed via the air circulation groove 41b. The inside of the body 10 and the outside air are adjusted.
The cap 50 is detachably attached to the front end side outer peripheral surface of the front shaft 15 by fitting or the like.

  In the writing instrument A according to the present invention, an ink occlusion body 20 that occludes ink for writing utensils is inserted and held in the rear shaft 11 that constitutes the shaft body 10 of the writing instrument, and the holding body in which the front shaft 15 and the writing core 30 are inserted. The holder 40, to which the writing core 30 is fixed by the deformation of a part of the holder 40, that is, the deformation of the holding pieces 44, 44,. A can be produced, and the ink occluded in the ink occlusion body 20 is efficiently supplied to the writing portion 32 of the writing core 30 by capillary force, and is used for writing or 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 in which the writing core 30 is fixed by a partial deformation of the holding body 40. Without using an adhesive such as a hot melt type, it is possible to obtain a writing instrument that can be manufactured at a low cost, with a simple structure, securely fixing the writing core to the holding body, stabilizing the assembly process, and Become.
Conventional mounting with a hot melt adhesive may cause the writing core to float due to excessive application of the hot melt adhesive, a deformation abnormality due to insufficient heating and melting, or a thin writing core, for example, When the width (t) is 3 mm or less, the hot melt adhesive is applied in a small amount, so that stable application becomes difficult. Further, when the hot melt adhesive is not applied, the shaft as the writing instrument body is used. There is a problem that the writing core is lifted by the pressure of the ink occlusion body (filling) incorporated in the holder, but when the writing core 30 is fixed by a partial deformation of the holding body 40, a hot melt adhesive or the like Since the writing core can be reliably fixed to the holding body with a simple structure without using the adhesive, a writing instrument that can be manufactured at low cost and with a stable assembly process is provided.
In the present invention, even when a writing core having a particularly thin width (t) of 3 mm or less is used, the writing core 30 is reliably secured by the deformation of the holding pieces 44, 44. By fixing to the holding core 40, it is possible to reliably prevent the removal of the writing core 30 without using an adhesive such as a hot melt type, and the writing core 30 is securely fixed to the holding groove 46 of the holding body 40.

  In the writing instrument 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. A writing tool that can be used until the final writing is provided, as well as sufficient visibility that can reliably read a character written in the writing direction.

The writing instrument of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the technical idea of the present invention.
For example, in the above embodiment, a part of the holding body 40 is deformed by the deformation (caulking) of the holding pieces 44, 44... It may be a caulking to be deformed.

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 modifications can be made without departing from the technical idea of the present invention.
For example, in the above-described embodiment, the writing instrument of the method (batting type) in which the ink stored in the ink storage body 20 is efficiently supplied to the writing unit 32 of the writing core 30 by capillary force is shown, but the valve mechanism is provided. A writing instrument, for example, an ink chamber in which ink is stored directly in the shaft that is the writing instrument body, is provided, and a valve mechanism is provided between the ink chamber and the writing core, and the spring of the valve mechanism is attached by pressing movement in the pen tip direction. The writing rod may be configured to retreat the valve rod against the force and release the valve portion to conduct ink to supply ink to the writing core.

In the above embodiment, the surface portion 47b of the holding body 40 that is in contact with the writing portion of the writing core 30 is formed with the non-smooth surface portion 49 having a concavo-convex shape in order to prevent a deviation at the time of writing. It is not necessary, and this uneven shape may be a satin shape. As a method of forming into a satin finish shape, for example, it can be formed by embossing (etching process) on a molding die, electric discharge machining, knurling by cutting, from the viewpoint of quality stability and cost by mass production, The embossing process (etching process) on the mold is desirable.
Furthermore, in the above-described embodiment, the writing core 30 as the pen tip is a single type writing tool. However, the twin type writing tool is provided with a pen body consisting of a thin-type writing core at the tip of the rear shaft to store the ink. It is good also as a structure which supplies the ink of the body 20 to the said pen body.
Furthermore, in the above embodiment, the ink for writing instruments has been described. However, a liquid body such as a liquid cosmetic, a liquid medicine, a coating liquid, and a correction liquid is used, and the writing core is combined with the liquid body. May be used.

  Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples.

[Example 1]
A writing instrument and ink conforming to the following configuration and FIGS. 1 to 4 were used. The size of the writing core, the holding body, etc. was as shown below.

(Configuration of the 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, ink guiding part: φ (t) 2 mm, length 16 mm, upper side length 4 mm , Lower side length 5mm, height 2mm
(Configuration of holding body 40)
Made of acrylic resin, visible light transmittance of 85% [manufactured by Suga Test Instruments Co., Ltd., reflectance was measured with a multi-light source spectrocolorimeter (MSC-5N) to obtain visible light transmittance. ]
Size of visible part 43 (square) after writing core is attached: 5 mm × 6 mm × 3 mm × 4 mm
The upper height 2 mm of the holding piece 44 is deformed (caulked) inward to fix the writing core 30.

(Configuration of writing tool members other than the writing core 30 and the holding body 40)
Ink occlusion body: PET fiber bundle, porosity 85%, φ6 × 77 mm
Writing instrument 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 Dye Co., Ltd.) 30 parts by weight Wetting agent: Glycerin 25 parts by weight Preservative: Bioace (manufactured by KAI Kasei Co., Ltd.) 0.7 parts by weight Ion-exchanged water 44.3 parts by weight

In the writing instrument of the first embodiment, the writing core 30 is attached to the writing instrument shaft body 10 via the holding body 40, and the writing core is formed by partial deformation of the holding body 40 and deformation (caulking) of the holding pieces 44, 44. By fixing 30, the writing core can be securely fixed to the holder with a simple structure without using an adhesive such as a hot melt type, and the assembly process can be stabilized and manufactured at low cost. It was.
In addition, when writing on the character using the obtained writing instrument, when visually checking the appearance of the other side through the visible portion 43 at the time of writing, the visibility is sufficient, easy to see, the writing direction I was able to write while reading the letters written on.

  Furthermore, this writing instrument is set in an automatic writing device, and after drawing a straight line at a writing angle of 65 °, a writing load of 1 N, a speed of 7 cm / s and a distance of 100 m on a high-quality paper surface according to JIS S6037, the written drawing state is visually observed. As a result of confirmation, it was found that the writing property was good, there was no blurring of the drawn lines, 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 marker, or an aqueous marker.

A Writing instrument 10 Shaft body 11 Rear shaft 15 Front shaft 20 Ink occlusion body 30 Writing core 40 Holding body 43 Visible part 44 Holding piece 50 Cap

Claims (4)

  A writing instrument having a writing core capable of guiding and retaining ink supplied from the writing instrument shaft, wherein the writing core is attached to the writing instrument shaft through a holding body, and a part of the holding body is deformed A writing instrument characterized by having a structure for fixing the writing core.   The writing instrument according to claim 1, wherein the deformed portion is a rear portion of the holding body.   The writing instrument according to claim 1 or 2, wherein the width of the writing core is 3 mm or less.   The writing instrument according to any one of claims 1 to 3, wherein the holding body has a visual recognition unit capable of visually recognizing a writing direction.

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