JP2009269251A - Brush tip structure of writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brush tip structure of a writing implement with which a fine line is written beautifully, by forming the shape of a brush tip to be pointed. <P>SOLUTION: The brush tip structure of the writing implement 11 has at least a tubular writing implement body 12 which holds ink or a cotton core 18 impregnated with the ink inside, a nose piece 13 which is inserted into the tip end 12a of the writing implement body 12, and the brush tip 15 provided in a through-hole 14 of the nose piece 13. The brush tip 15 is formed of a hydrophilic synthetic resin material, while a through-hole 16 along the length direction is formed in the central part. Thread-like member 17 formed of the synthetic resin material are gathered up and bundled in the through-hole 16 and the tip enf 17a of the thread-like member 17 is so positioned as to project at a prescribed length from the tip end 15a of the brush tip 15. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a brush tip structure of a writing instrument such as a brush pen.

  As a conventional brush pen structure, the structure shown in FIG. 6 is known. This writing pen includes a writing instrument main body 2 having an ink storage unit 1, a collector 3 provided inside the writing instrument main body 2, a relay core 4 penetrating through the central hole of the collector 3, and a tip of the writing instrument main body 2. It is comprised from the nosepiece 5 to fit and the brush tip 6 which converges on this nosepiece 5 (refer patent document 1).

The relay core 4 is in a state where the base portion 4 a is positioned in the ink storage portion 1 and the tip portion 4 b is inserted into the center portion of the brush tip 6. As described above, the relay core 4 is interposed between the ink storage unit 1 and the brush tip 6 so that the ink flows out smoothly to the brush tip 6.
Japanese Utility Model Publication No. 5-58357

  In this conventional brush pen, since the relay core 4 is provided at the center of the brush tip 6, it is necessary to bother the life of the center of the brush tip 6. The life hair is the longest core of the brush, and this life hair can write a fine thin line. Therefore, when the hair is pulled out, not only the shape of the brush tip 6 cannot be formed sharp, but also there is a problem that fine lines cannot be written cleanly.

  Therefore, the brush pen in the conventional example has a problem that must be solved by forming the shape of the brush tip 6 in a sharp shape so that fine lines can be written beautifully.

  As a specific means for solving the problems of the conventional example, the present invention includes a cylindrical writing instrument main body in which ink or padding impregnated with ink is accommodated, a nose piece fitted into the tip of the writing instrument main body, The writing tip structure of a writing instrument having at least a writing tip provided in a through-hole of a nosepiece, wherein the writing tip is formed of a synthetic resin material having hydrophilicity, and a through-hole along a length direction is formed in a central portion. A thread-like member formed of a synthetic resin material is focused on the through-hole, and the tip of the thread-like member is positioned to protrude from the tip of the brush tip by a predetermined length. It provides a brush tip structure.

The synthetic resin material having hydrophilicity is a sintered resin;
The penetrating hole of the brush tip is formed in a tapered shape with the rear end portion having a larger diameter and a reduced diameter along the tip portion direction;
Is included.

The writing tip structure of the writing instrument according to the present invention includes a cylindrical writing instrument main body in which ink or a pad filled with ink is accommodated, a nose piece fitted into the tip of the writing instrument main body, and a through hole of the nose piece The writing tip structure of a writing instrument having at least a writing tip provided, wherein the writing tip is formed of a synthetic resin material having hydrophilicity, and a through hole is formed in the center portion along the length direction. In this case, a thread-like member formed of a synthetic resin material is converged, and the tip of the thread-like member is positioned so as to protrude a predetermined length from the tip of the tip of the brush. A thread-like member is provided. Therefore, the center of the brush tip can be formed in a sharp shape, and fine lines can be written beautifully.
Further, since the brush tip is integrally formed by putting a synthetic resin material having hydrophilicity into a mold, there are various excellent effects that dimensional accuracy is high, mass production is possible, and manufacturing cost is low and inexpensive.

  Further, since the synthetic resin material having hydrophilicity is a sintered resin, this sintered resin is made by pressing and compacting a powder body of a synthetic resin material such as polyethylene, and the inside thereof. Has an excellent effect that the continuous bubbles are formed and the action of sucking up the liquid by capillary action is good.

Then, the penetrating through-hole has a rear end portion whose diameter is increased and a diameter thereof is reduced along the tip portion direction so as to be tapered, whereby the thread-like member focused on the through hole is formed along the tip portion direction. It will be focused into a sharp shape, and even thinner lines will be drawn.
Furthermore, since the density of the thread-like member increases as it extends in the direction of the distal end, various excellent effects are achieved in that the ink easily flows in the direction of the distal end due to capillary action.

  Next, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1, reference numeral 11 denotes a writing instrument. The writing instrument 11 includes a cylindrical writing instrument main body 12, a nose piece 13 that fits into a distal end portion 12 a of the writing instrument main body 12, and a through hole 14 of the nose piece 13. And a thread-like member 17 focused on the through hole 16 of the brush tip 15.

  The writing instrument body 12 is formed in a cylindrical shape with an open end 12a, and an ink storage portion 19 is provided therein. The ink storage unit 19 stores ink, an ink cartridge, or a batting 18 impregnated with ink.

  A step portion 20 is formed along the circumferential direction on the distal end portion 12 a side of the writing instrument body 12, and a reduced diameter portion 21 extends from the step portion 20.

  As shown in FIGS. 1 to 3, the nosepiece 13 has a through hole 14 formed in the center thereof along the length direction. A tapered portion 22 is provided on the tip side of the nosepiece 13, and a step portion 23 is formed along the circumferential direction at the rear portion of the tapered portion 22. This step 23 abuts against the tip 12 a of the writing instrument body 12. Further, a cylindrical portion 24 is extended at the rear portion of the step portion 23, and a groove portion 25 is formed on the outer peripheral surface of the cylindrical portion 24. The outer diameter of the cylindrical portion 24 is slightly smaller than or substantially the same as the inner diameter of the reduced diameter portion 21. That is, it is comprised so that the cylinder part 24 can be engage | inserted in the state crimped | bonded to the inner side of the reduced diameter part 21 of the writing instrument main body 12. FIG.

  The brush tip 15 is formed of a synthetic resin material having hydrophilicity, for example, a sintered resin. This sintered resin is made by pressing and compacting a powdered body of a synthetic resin material such as polyethylene. Open bubbles are formed inside, and the action of sucking up the liquid by capillary action is good.

  Since the brush tip 15 is formed by integrally molding a synthetic resin material having hydrophilicity, for example, a sintered resin, in a mold, the dimensional accuracy is high, and a tapered through-hole 16 to be described later can be made with high dimensional accuracy. Moreover, mass production is possible, and the manufacturing cost is low and inexpensive.

  Moreover, as shown in FIG.4 and FIG.5, the pen tip 15 has the through-hole 16 along the length direction in the center part. The through-hole 16 is formed in a tapered shape with the rear end portion 16b having a larger diameter and a reduced diameter along the direction of the front end portion 16a. Therefore, the thread-like member 17 focused on the through-hole 16 converges in a sharp shape along the direction of the distal end portion 16a, so that a thinner line can be drawn. Further, since the density of the thread-like member 17 increases along the direction of the tip end portion 16a, the ink easily flows in the direction of the tip end portion 16a by capillary action.

  The thread-like member 17 is formed by bundling thread materials made of a known synthetic resin material, and the thread-like member 17 is converged in the through hole 16. As shown in FIGS. 1 to 3, the tip end portion 17 a of the thread-like member 17 is positioned to protrude from the tip end portion 15 a of the brush tip 15 by a predetermined length. Further, the rear end portion 17 b of the thread-like member 17 is located in the vicinity of the rear end portion 15 b of the brush tip 15.

  The brush tip structure of the writing instrument 11 configured as described above is provided with the thread-like member 17 at the center portion of the brush tip 15 instead of the conventional life hair, so that the center portion of the brush tip 15 can be formed in a sharp shape and is thin. You will be able to write the lines neatly. Furthermore, since the through-hole 16 of the brush tip 15 is formed in a taper shape, the thread-like member 17 converges in a sharper shape along the direction of the distal end portion 16a, so that a thinner line can be drawn.

2 is a cross-sectional view of the writing instrument 11. FIG. It is a top view of the nosepiece 13 with which the brush tip 15 was converged. It is sectional drawing of the nosepiece 13 with which the brush tip 15 was converged. FIG. 6 is a plan view of the brush tip 15. FIG. 6 is a cross-sectional view of the brush tip 15. It is sectional drawing of the brush pen which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ink storage part 2 Writing instrument main body 3 Collector 4 Relay core 4a Base part 4b Tip part 5 Nose piece 6 Writing tip 11 Writing tool 12 Writing tool main body 12a Tip part 13 Nose piece 14 Through-hole 15 Writing tip 15a Tip part 15b Rear end part 16 Through-hole 16a Part 16b rear end part 17 thread-like member 17a front end part 17b rear end part 18 batting 19 ink storage part 20 step part 21 reduced diameter part 22 taper part 23 step part 24 cylinder part 25 groove part

Claims (3)

The writing tip of a writing instrument having at least a cylindrical writing instrument main body in which ink or padding impregnated with ink is stored, a nose piece fitted into the tip of the writing instrument main body, and a writing tip provided in a through hole of the nose piece Structure,
The brush tip is formed of a synthetic resin material having hydrophilicity, and a through-hole along the length direction is formed at the center,
A thread-like member made of a synthetic resin material is focused on the through hole,
A tip structure of a writing instrument, wherein the tip of the thread-like member is positioned to protrude from the tip of the tip by a predetermined length. The writing tip structure according to claim 1, wherein the hydrophilic synthetic resin material is a sintered resin. The pen tip structure of the writing instrument according to claim 1, wherein the penetrating hole of the writing tip is formed in a tapered shape with a diameter of a rear end portion thereof being reduced and a diameter being reduced along a tip portion direction.

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