JP2017119385A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument that has a simple structure without using a hot-melt type adhesive agent or the like but reliably can fix writing core to a holding body, stabilize assembly process and manufacture it at low cost.SOLUTION: The writing instrument A includes the writing core 30 that can lead and store ink supplied from a writing instrument shaft body 10. The writing core 30 is mounted to the writing instrument shaft body 10 via the holding body 40. At least part of a surface part of the holding body 40 coming into contact with the writing core 30 has a non-smooth surface shape 48.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 in a writing instrument having a writing core that can guide and hold ink supplied from a shaft body that is 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. 4 (a), ink is stored in the ink storage body 161 in the shaft body 160 serving as the 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. A pen body 90 made of a bold type writing core shown in FIGS. 4B and 4C 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 and 92 made of a substantially U-shaped porous member and a writing portion 93 on the outer periphery of a holding body 91 which is a transparent support member. A wick is attached. As shown in FIGS. 4 (c) and 4 (d), the holding body 91 has a writing core composed of a substantially U-shaped porous member including ink guiding portions 92 and 92 and a writing portion 93 on its outer peripheral surface. The fitting groove 91b which has the step part 91a which fits is formed, and the fitting protrusion 91c for attaching to the fitting hole of the rear shaft of the writing instrument shown in FIG. , 91c are formed. 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 and the writing portion 93 made of a substantially U-shaped porous member 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 it on the writing instrument shaft and making the surface portion of the holder in contact with the writing core have a specific structure.

That is, the present invention resides in the following (1) to (6).
(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 the holding body and is in contact with the writing core. A writing instrument, wherein at least a part of the surface portion of the holding body has a non-smooth surface shape.
(2) The writing instrument as described in (1) above, wherein the non-smooth surface shape is an uneven shape.
(3) The writing instrument as described in (2) above, wherein the non-smooth surface shape is a satin shape.
(4) The writing core includes an ink guiding portion and a writing portion for deriving ink from the ink guiding portion, and at least a part of the surface portion of the holding body that contacts the ink guiding portion has a non-smooth surface shape. The writing instrument according to any one of (1) to (3) above.
(5) The writing instrument as described in any one of (1) to (4) above, wherein the width of the writing core is 3 mm or less.
(6) The writing instrument as described in any one of (1) to (5) 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 longitudinal cross-sectional view, (b) is a top view, (c) is a front 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 YY line sectional view, (e) is a left side view, and (f) is a right side view. (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 left view, (c) is a front view, (d) (E) is a sectional view taken along the line ZZ, (f) is a perspective view seen from the rear, and (g) 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 3 show an example of an embodiment of the writing instrument of the present invention, and FIGS. 1A to 1C are a longitudinal sectional view, a plan view, and a front 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, and Fig.3 (a)-(g) is each drawing which shows an example 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, as shown in FIG. 1A, a bottomed cylinder that houses an ink storage body 20 impregnated with ink for a writing instrument. And a front shaft 15 to which a holding body 40 to which a writing core 30 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. 1A, 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 constituted by 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 entire holding body 40 configured in this way is made of a material having visibility and flexibility, such as PP, PE, PET, PEN, nylon (6 nylon, 12 nylon, and other general nylons). (Including nylon and the like), acrylic, polymethylpentene, polystyrene, ABS, and the like by molding, the characters written in the writing direction at the visible portion 43 can be effectively visually recognized. 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 this writing instrument A, when the writing core 30 is inserted into the holding groove 46, at least a part of the surface portion of the holding body 40 that comes into contact with the writing core 30, that is, the bottom surface of the holding groove 46 is not. It has a smooth surface shape. In the present embodiment, at least a part of the side surface portions 47a, 47a of the holding groove 46, which is a portion in contact with the ink guiding portions 31, 31 of the writing core 30, has a non-smooth surface shape, specifically, a retainer. Non-smooth surface portions 48 and 48 having wedge-shaped irregularities (protrusions) for prevention are formed. Due to the structure of the non-smooth surface portions 48, 48, when the writing core 30 is fitted into the holding groove 46 from the front side of the holding body 40, the wedge-shaped non-smooth surface portions 48, 48 are the bottom surfaces of the ink guiding portions 31, 31 of the writing core 30. The writing core 30 is securely fixed in the holding groove 46 of the holding body 40 by strongly entering the inside of the side. In this structure, the direction in which the writing core 30 is pulled out is the direction of the writing portion 32 that is opposite to the direction in which the writing core 30 is inserted (press-fit). By forming at least a part of the surface portions 47a and 47a into a non-smooth surface shape, it is possible to prevent removal without using an adhesive such as a hot-melt type, and the writing core 30 holds the holding body 40. It is securely fixed to the groove 46. The wedge-shaped non-smooth surface portions 48, 48 are turned back to prevent slipping without using an adhesive or the like, and the writing core 30 is securely fixed to the holding groove 46 of the holding body 40. The non-smooth surface portion 48 may be formed not only on the bottom surface of the holding groove 46 but also on the side surface.
Further, in the present embodiment, the front surface portion 47b of the holding groove 46, which is a portion in contact with the writing portion 32 of the writing core 30, is also prevented from being displaced when the writing portion 32 is written. A non-smooth surface portion 49 is formed in which the uneven step for forming the shape is a fine uneven shape.
In the present invention, the size, the number, etc. of the non-smooth surface portions 48, 48 may be any shape that prevents the non-smooth surface from being removed, and the ink supplied from the writing instrument shaft 10 can be applied to the writing portion 32 without any problem. Although not particularly limited if possible, preferably, the height of the concavo-convex shape is desirably 1/20 to 1/2 of the height of the writing core 30, and the area of the side surface portions 47 a and 47 a of the holding groove 46. It is desirable that the occupying ratio of the non-smooth surface portion is 10% or more, particularly 30% to 100%.

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 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 the inside of the tip side. In addition, you may form the recessed part which inserts the back side edge parts 31a and 31a of the ink guidance | induction parts 31 and 31 in the front end side inside of the ink occlusion body 20. FIG. Further, when the pressure in the shaft body 10 increases, ink dripping or the like may occur from the pen tip. However, in the writing instrument A of the present embodiment, the inside of the shaft body 10 and the outside air via the air circulation groove 41b. And adjusting.
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, the ink occlusion body 20 that occludes the ink for the writing instrument is inserted and held in the rear shaft 11 constituting the shaft body 10 of the writing instrument, and the front shaft 15 and the writing core 30 are inserted and held. By sequentially fixing the fixed holding body 40 by fitting or the like, the writing implement A can be easily produced. The ink occluded in the ink occlusion body 20 is efficiently applied to the writing portion 32 of the writing core 30 by capillary force. To be used for writing.

In the writing instrument A configured as described above, the writing core 30 is attached to the writing instrument shaft body 10 via the holding body 40, and at least a part of the surface portion 47 of the holding body 40 in contact with the writing core 30 is non-smooth. By adopting the surface shape, 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. A writing instrument will be obtained.
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 is used as the writing instrument body. Although there was a problem that the writing core floats due to the pressure of the built-in ink occlusion body (filling), at least a part of the surface portion 47 of the holding body 40 that contacts the writing core 30 is wedge-shaped non-smooth surface shape Therefore, the writing core can be securely fixed to the holder with a simple structure without using an adhesive such as a hot-melt adhesive, so that the assembly process can be stabilized and manufactured at low cost. The writing instrument can be provided.
In the present invention, even when the writing core has a particularly thin width (t) of 3 mm or less, the wedge-shaped non-smooth surface portions 48 and 48 are turned back without using an adhesive such as a hot melt type. Therefore, the lead core 30 is surely prevented from coming off, 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, since the holding body 40 to which the writing core 30 is fixed is made of a material having visibility as described above, 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, at least part of the surface portion 47 of the holding body 40 that comes into contact with the writing core 30 has a non-smooth surface shape, non-smooth surface portions 48 and 48 having a wedge-shaped (triangular) uneven shape, and the like. However, the non-smooth surface shape may be a satin shape.
Examples of a method for forming at least a part of the surface portion 47 of the holding body 40 in contact with the writing core 30 into a matte shape having a non-smooth surface shape include, for example, embossing (etching) on a molding die, and electric discharge machining. It can be formed by knurling by cutting, and embossing (etching) to a molding die is desirable from the viewpoint of quality stability and cost by mass production.
The surface roughness (non-smooth surface shape) of the surface portion 47 is the arithmetic average roughness Ra based on JIS B0601: 2001 (corresponding to the finishing symbol ▽▽ in the drawing) by the above-described processing of the surface portion 47. (Rougher) It is desirable to be 10.0 μm or more. In addition, the surface roughness of the surface portion 47 at that time is measured using a non-contact type three-dimensional measuring device NH-3 (manufactured by Mitaka Kogyo Co., Ltd.). 8 mm, measurement length 3 mm, and measurement pitch 0.005 mm.
By making at least a part of the surface portion 47 of the holding body 40 in contact with the writing core 30 into a satin shape that is a non-smooth surface shape, as in the above embodiment, with a simple structure without using an adhesive. In addition, the writing core can be securely fixed to the holding body, the assembly process can be stabilized, and a writing instrument that can be manufactured at a low cost can be obtained.

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.

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]
Writing instruments and inks conforming to the following configuration and FIGS. 1 to 3 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
Non-smooth surface portion 48: wedge-shaped uneven shape: right triangle 1.2 × 0.6 × 2.0 mm: number 3, occupation ratio (in the entire surface portion 47a) 40%
Non-smooth surface portion 49: uneven shape: length 2.0 mm, uneven step: 0.1 mm, occupation ratio: entire surface portion 47b

(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 at least a part of the surface portion 47 of the holding body 40 that contacts the writing core 30 has a non-smooth surface shape. As a result, the writing core could be securely fixed to the holder with a simple structure without using an adhesive such as a hot melt type, and the assembly process could be stabilized and produced at low cost.
In addition, when writing on the character using the obtained writing instrument, when visually checking the appearance of the other side through the visible part at the time of writing, the visibility is sufficient, easy to see, in the writing direction I was able to write while reading the written letters.

  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 48 non-smooth surface shape (non-smooth surface portion)
50 cap

Claims (6)

  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 is in contact with the writing core. A writing instrument characterized in that at least a part of the surface portion of the slab has a non-smooth surface shape.   The writing instrument according to claim 1, wherein the non-smooth surface shape is an uneven shape.   The writing instrument according to claim 2, wherein the non-smooth surface shape is a satin shape.   2. The writing core includes an ink guiding portion and a writing portion for deriving ink from the ink guiding portion, and at least a part of the surface portion of the holding body that contacts the ink guiding portion has a non-smooth surface shape. Writing instrument as described in any one of -3.   The writing instrument according to any one of claims 1 to 4, wherein the width of the writing core is 3 mm or less.   The writing instrument according to any one of claims 1 to 5, wherein the holding body includes a visual recognition unit that can visually recognize a writing direction.

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