JPS61197290A - Pen point made of ceramic and writing utensil with said pen point - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a ceramic pen nib and a writing instrument equipped with the ceramic nib.

(Prior art) Karaguchi is the best in terms of its sharp line quality and ability to draw arbitrary lines [t], but Toriguchi can be written in two directions, and moreover, the ink must be replenished each time. There is a basic difficulty in having to do so. For this reason, even in X-Y plotter pens that require sharp line quality, hollow pens with no directionality for writing are used, and the line [
Currently, a plurality of different pens are selected and used.

Hollow pens are superior in that there is no directionality for writing, and various materials have been proposed and used for hollow pen nibs for fine writing. Pen nibs made of synthetic pens and pen nibs made of fiber bundles have a good touch feel on the paper surface, but they have poor abrasion resistance and can cause lines [I
There are disadvantages such as J is not constant and sharp beam quality cannot be obtained. In addition, there are pen nibs made of ultra-hard metal that provide a good touch feel on the paper surface, but in this case it is not good.
・Difficulties exist in terms of chemical resistance to ink components, etc., and corrosion and dry solidification of ink.
This may cause blockages, etc.

With the recent development of ceramic technology, various ceramic pen lights have been proposed (for example, Japanese Patent Application Laid-Open No. 55-2293
No. 2 No. 55-46995, No. 58-167198, etc.), but regarding these, the material, addition technology, etc.
Furthermore, there are some difficult problems in actual commercialization, such as the ink guiding means, and the product has not been widely used as a fully satisfactory product.

In addition, for example, a ceramic pen light has been proposed that is designed to improve the relationship between the ink guiding means and the clogging of paper fibers that occurs during writing (for example, Utility Model No. 59-1874
82 Publication), these are also proposals for commercialization.

(Problems to be Solved by the Invention) In ceramic pen nibs, even if a slit-shaped ink guiding groove extending to the tip is formed on the side surface of the nib as an ink guiding means, the material of the nib is inherently flexible. Since the ink guide groove does not have a widening or narrowing action, the ink inside the slit-shaped ink guide groove dries naturally, and the ink is especially absorbed by the frictional heat generated by the friction with the paper surface when writing. Because the ink dries rapidly, the ink dries and solidifies, resulting in significant clogging. In addition, if the ink guide groove is configured as described above, the writing direction must be on the side of the ink guide groove, so the writing direction is specified, which reduces the non-directionality of the writing direction, which is the original advantage of the hollow pen. There is a drawback that

゛The present invention was completed as a result of various experiments in order to meet the above-mentioned requirements.The first object of the present invention is to be particularly suitable for fine writing, and of course, it is suitable for writing with ink without directionality. It is an object of the present invention to provide a ceramic pen nib in which guidance is performed accurately and there is no risk of clogging caused by drying and solidification of ink.

A second object of the present invention is to provide a writing instrument equipped with such a pen tip.

"Structure of the Invention" (Means for Solving the Problems) The ceramic pen nib according to the present invention is made of a ceramic material such as zirconia, and has a spherical tip formed in a spherical shape. The spherical portion of the tip is provided with grooves in at least two directions communicating with the ink guiding hole.

Further, the writing instrument according to the present invention is a pen that is molded from a ceramic material such as zirconia, and has a cylindrical rear end side, a conical tip side continuous with this, and a spherical tip. A nib body, formed from the rear end side of the nib body to the tip; 1. E: an ink guide hole having a tapered shape on the inside of the foot tip side, a groove formed in at least two directions on the spherical surface of the foot tip so as to communicate with the ink guide hole, and an ink guide hole inside the ink guide hole. and a tapered ink guiding wick inserted into the wick.

(Function) In the ceramic pen nib of the present invention, the pen nib body is molded from a ceramic material such as zirconia so that the tip forms a spherical surface, so of course it has excellent wear resistance and chemical resistance. , especially for zirconia ceramics, 2
Since it is composed of fine crystals of ~3w or less, it has an extremely good sliding feel when writing, and the tip makes point contact with the paper surface, making it suitable for fine writing. The ink supplied from the ink guiding hole formed inside from the rear end to the tip is accurately guided to the spherical part of the tip, allowing writing. In this case, the spherical part has grooves formed in at least two directions, so it has a heat dissipation effect, and even if frictional heat is generated with the paper surface when writing, this heat can be dissipated, so the ink will not dry and solidify unnecessarily. .

The writing instrument according to the present invention has a devised ink guiding means, and the pen tip body consists of a cylindrical part and a conical part, and the ink guiding hole is tapered inside the conical part to draw ink from the ink tank side. The ink guide core to be guided is tapered to accommodate this, so excess ink is not supplied, and even during high-speed writing, the ink j11 that corresponds to the core is accurately supplied in 1J5 conductors. can do.

(Example) Examples of a ceramic pen nib and a writing instrument equipped with the nib according to the present invention will be described with reference to the drawings.

Figure 1 is a perspective view of the entire ceramic nib, Figure 2 is a perspective view taken along the line A-A in Figure 1, Figure 3 is a front view of the nib, and Figure 4 is a rear view of the same as above. , FIG. 5 is an enlarged sectional view of the tip of the pen tip, and FIG. 6 is an enlarged sectional view of the pen tip as seen from another direction.
FIG. 7 is a cross-sectional view of the pen tip with an ink guiding core inserted therein for use as a writing instrument.

In the figure, l indicates the entire ceramic nib according to the present invention, and the nib main body 2, which consists of a cylindrical part 3 on the rear end side and a conical part 4 on the tip side, is molded from a ceramic material such as zirconia, and the tip body 2 is made of a ceramic material such as zirconia. is formed into a spherical shape. Reference numeral 5 designates an ink guide hole formed from the rear end side to the tip, and grooves 7 are formed in at least two directions in the spherical portion 6 of the tip to communicate with the ink guide hole 5. has been done.

In the embodiment, the pen nib main body 2 is molded from zirconia, and the pen nib molded from zirconia has super hardness.
Moreover, since it is made of fine crystals, it has the advantage of providing smooth and excellent writing characteristics. Further, in the illustrated example, grooves 7 in two directions are formed in the spherical portion 6, but these may be formed in a cross shape in four directions. This groove 7 is formed to become wider as it goes outward, so that even if paper fibers are picked up during writing, the fibers can be easily pulled out. Furthermore, even if frictional heat is generated with the paper surface during writing, this groove 7 can radiate heat from the groove, and can prevent the ink from drying and solidifying due to heat. Note that a notch 8 is formed at the rear end of the pen tip main body 2 to be engaged and held by a pen tip holding member (not shown).

The L ink guide hole 5 has a tapered shape within the conical portion 4, and the ink guide core 11 inserted into the ink guide hole 5 is made of a fibrous material molded into a rod shape. It is tapered to correspond to the guide hole 5. With such a configuration, it is possible to accurately guide and supply ink from the ink tank side without excess or deficiency.

To explain the actual machining dimensions of the pen tip 1 mentioned above, the overall length is 12III11, the lengths of the cylindrical part 3 and the conical part 4 are 3mm, and the lengths of the cylindrical part 4 are 8mm, and the length of the cylindrical part 3 is 8mm. The radius 3R is 2.7 mm.

The radius of curvature 6R of the spherical portion 6 is, for example, 0.3 mm, and the radius of curvature 6R of the groove 7 in this case is 0.1 mm to 0.3 mm.
It can be set to ma+. Mo, the width of the groove is 7 sentences is 0. In
+m, it is possible to draw an edge with a line width of 0.1 mm, and when the groove width 7 is 0.3 square, a line with a line width of 0.3 mm can be drawn. Note that the depth of the groove 7 is 0.5 ma+.

If the F foot coverage radius 8R is 0.41, the above groove rl171
is set to 0.4 mm to 0.5 mm, thereby making it possible to draw a line with a line I+] of 0.4 mm to 0.5 H, respectively.

"Effects of the Invention" According to the ceramic pen nib according to the present invention, the ceramic pen nib has excellent abrasion resistance.
It is rich in chemical resistance, etc., and has excellent hardness, so it can be used as a pen tip that is smooth and has excellent writing characteristics. In addition, since it is molded from a ceramic material, the initial line It] remains unchanged, and the initial writing characteristics can be maintained without sagging or the like.

The writing surface of the tip is spherical, and the contact with the paper surface is point contact, making it ideal as a pen tip for fine writing, and also ensuring the non-directionality of writing, which is an advantage of hollow pens. . Therefore, the ink that is guided and supplied through the ink guide hole formed inside the nib body is guided and led out to the spherical part of the tip, and it is possible to write with the spherical part with a writing feel similar to that of a ballpoint pen.

Grooves in at least two directions are formed in the L sphere distribution surface, which allows the ink to be guided and drawn out accurately, and even if frictional heat is generated with the paper surface during high-speed writing, it can be dissipated. There is no risk that the ink will dry and solidify. Even if the ink components solidify, the pen light is made of ceramic, so the ink components can be burned off by holding the pen tip over a flame or the like to ignite the heat. There is no risk that the pen light will be deformed or altered.

According to the writing instrument of the present invention, it is equipped with a ceramic nib as described above, and a tapered ink guide core is inserted into a tapered ink guide hole formed inside the pen nib. Ink can be accurately guided from the ink tank side to the pen tip, and continuous writing can be ensured without running out of ink or dripping of ink.

[Brief explanation of drawings]

The drawings show an example of a ceramic nib and a writing instrument equipped with the nib according to the present invention, and FIG. 1 is a perspective view of the entire ceramic nib, and FIG. 2 is taken along line A-A in FIG. 1. 3 is a front view of the pen tip, FIG. 4 is a rear view of the same as above, and FIG. 5 is an enlarged sectional view of the tip of the pen tip.
FIG. 6 is an enlarged cross-sectional view seen from another direction, and FIG. 7 is a cross-sectional view of the pen with an ink guiding core inserted through the nib to show it as a writing instrument. l: Entire ceramic nib, 2: Pen nib body 3: Cylindrical part, 4: Conical part, 5: Ink guide hole, 6: Spherical part? = Groove, 11: Ink guide core patent applicant Original Design Co., Ltd.
Kyocera Corporation
Kaime 1 share Company agent Patent attorney Isamu Kakiuchi - “k;e,?
City TI: , 4) + 1 + '4 March 29, 2013 Director General of the Patent Office J and 1 Mr. Ka Manabu 1.11 Displays Patent Application No. 39797 of 1985 2 Title of Invention Ceramic nib and Relationship between the writing instrument 3 with the pen tip and the person making the correction/11 cases Patent applicant: 1, 5'4f, Shintomi, Chuo-ku, Tokyo Original Design Co., Ltd. (2 others) Representative: Takeshi Taiyo 4 , Agent Uematsu Building (7542), 1-9-2 Nishishintachibana, Minato-ku, Tokyo
Patent Attorney Kakiuchi Tsuki, (o3) 591-
4747 5. Amendment order [1 attachment 6. Column 4 of "Detailed explanation of the invention" of the subject specification of the supplementary IF. Brief explanation of the drawings j bO, 3, p191 7. Contents of amendment (1) The phrase ``Figure 4 is the same upper back side'' on page 8, line 9 of the specification is corrected as ``Figure 4 is the same upper side J.'' (2) ``Figure 4'' on page 12, line 16 of the specification. The sentence "Figure 4 is a rear view of the same as above" is corrected to "Figure 4 is a side view of the same as above."

Claims (1)

[Claims] 1. The tip of the pen tip molded from a ceramic material such as zirconia is formed into a spherical surface, and an ink guiding hole is formed from the rear end side to the tip, and the spherical portion of the tip is formed with a spherical surface, and the ink guide hole is formed in the spherical portion of the tip. A ceramic pen nib characterized by having grooves formed in at least two directions in communication with a guide hole. 2. The ceramic pen nib according to claim 1, wherein the pen light is molded from zirconia. 3. The ceramic pen nib according to claim 1, wherein the groove to be formed in the spherical portion is formed to become wider toward the outside. 4. Claim 1, characterized in that the pen tip is composed of a cylindrical part on the rear end side and a conical part on the front end side.
Ceramic nib as described in section. 5. The ceramic nib according to claim 1, wherein a notch is formed at the rear end for engagement and retention by a nib holding member. 6. A pen nib body molded from a ceramic material such as zirconia and having a cylindrical rear end and a conical tip continuous with the cylindrical shape, and the pen nib. An ink guide hole formed from the rear end of the main body to the tip and tapered in the tip side, and a spherical part of the tip extending in at least two directions so as to communicate with the ink guide hole. The formed groove and
A writing instrument characterized by comprising a tapered ink guide core inserted into the ink guide hole.