JPH0839981A - Pen point made of synthetic resin - Google Patents

Abstract

PURPOSE:To keep the loosening or touch of a pen point itself same at any position on a writing surface by almost parallelly forming a plurality of the long sides of the writing surface and also almost parallelly forming a plurality of the long sides of the cross section of the writing part parallel to the writing surface. CONSTITUTION:The tip part of a pen point A made of a synthetic resin is formed into a flat writing part 1. The writing part 1 has a writing surface having the opening parts 201 of ink passages 2 therein and the writing surface is obliquely formed with respect to an axial direction. In this case, a plurality of the long sides 301, 302 of the writing surface 3 in the writing part 1 are set almost parallelly. By this constitution, the loosening or touch of the pen point itself is kept same at any position on the writing surface 3. The single part 301 of the writing surface is formed in order to set the width of a writing mark to an appropriate size. Further, a slit 5 is formed to the writing part 1 from the writing surface 3 to allow a plurality of the ink passages 2 to communicate with each other in the vicinity of the opening parts 201.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin nib having a flat writing portion having an ink passage therein, and a writing surface at which the ink passage is opened is formed obliquely with respect to an axial direction.

[0002]

2. Description of the Related Art Conventionally, polyester, polyacetal,
It is known that a plurality of communicating holes are formed inside a molded article made of synthetic resin such as polyamide to serve as a pen tip made of synthetic resin. In addition, the writing part, which is the tip of the nib, is made flat so that the flexibility and the softness of the writing feel of the synthetic resin can be used, and fine lines and thick lines can be written with a single nib. Also known are those suitable for writing so-called calligraphic characters and Arabic characters.

Further, it is known that a writing surface, which has an ink passage opening and is mainly in contact with a writing surface, is formed obliquely with respect to the axial direction so as to facilitate writing depending on the writing angle.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above, in a pen tip in which the writing portion is flat and the fine line and the thick line can be written by one pen tip, the writing portion is cut and cut. Alternatively, when the writing surface is formed obliquely with respect to the axial direction by performing processing such as polishing, a wide portion and a narrow portion are formed on the writing surface. As shown in FIG. 4, which is a perspective view of such a conventional nib, when the wide portion 3a and the narrow portion 3b are formed, the bending and the feel of the nib change depending on the position of the writing surface 3 '. There was a problem that it was difficult to write.

[0005]

That is, according to the present invention, a writing surface in which the ink passage is opened is formed obliquely to the axial direction at the tip of a flat writing portion having an ink passage therein. In a resin pen tip, long sides of the writing surface are substantially parallel to each other, and long sides of a cross section of a writing portion parallel to the writing surface are substantially parallel to each other. The point is the summary.

[0006]

EXAMPLE One example is shown in FIGS. 1 and 2 show a synthetic resin nib of the present invention, which is made of a material such as polyester, polyacetal, or polyamide, which is molded by an extrusion molding method by monofilament self-fusion. As shown in FIG. 1 which is a perspective view of the synthetic resin nib A and FIG. 2 which is a side view, the tip portion (upper side of the drawing) of the synthetic resin nib A is a flat writing portion 1. The writing surface 1 has a plurality of writing surfaces 3 formed therein, and has an opening 201 of an ink passage 2 for communicating ink.
And the writing surface 3 is formed obliquely with respect to the axial direction. Further, in the writing unit 1, the long-sized portion 401 of the writing surface 3 of the side wall 4 is reduced in diameter toward the writing surface by polishing or cutting, and the long sides 301, 30 of the writing surface 3 are included.
The two are formed so as to be substantially parallel to each other. In addition, a piece 303 of the writing surface 3 is formed by polishing or cutting in order to make the width of the handwriting appropriate.

Further, the writing portion 1 is provided with slits 5 formed by inserting a cutting tool from the writing surface 3, and the ink passages 2 formed independently by the slits 5, respectively.
However, they are communicated with each other in the vicinity of the opening 201. By doing so, the slit 5 has a certain degree of capillary force, ink is supplied from the ink passage 2, and it is possible to make the ink relatively abundant in the vicinity of the writing surface of the writing unit 1 and to create dark handwriting. It is something that can be kept. Here, since the slit 5 is formed, the tip portion of the writing portion 1 is divided into two thin portions, and the flexibility of the writing portion 1 is increased, but the bottom portion of the slit 5 is It is formed so as to be substantially parallel to the writing surface 3, and its flexibility does not change depending on the position of the force partially applied to the writing surface 3.

The writing part 1 is formed integrally with a long main part 6 which is connected to a writing instrument body (not shown). A thick portion 601 that regulates to some extent is formed.

The one shown in FIG. 2 is cut along the line I-I,
As shown in FIG. 3 which is a view seen from a direction perpendicular to the cross section, the side wall 4 of the writing part 1 polishes a long-corresponding portion 401 of the writing surface 3 in a direction parallel to the writing surface 3. Since it has been cut or cut, the long sides 311 and 312 of the cross section parallel to the writing surface 3 shown in the drawing are substantially parallel to each other. As a result, the bending of the writing part 1 can be made almost equal regardless of the position of the writing surface 3 (such as writing pressure).

In addition to the above, various modifications can be made without departing from the gist of the present invention. As an example, the ink passage 2 is shown as a plurality of independent ink passages, but it may be one ink passage formed of a plurality of portions that communicate with each other, and the opening thereof may be a side wall of the writing portion 1, particularly a cutting portion. The opening may be provided in the polished portion. In this case, the ink passage opened on the side wall can be closed by using the flutter of the resin material during the polishing process. Also, in the example above,
Although the whole pen tip is extruded in a flat plate shape, the extruded columnar object may be processed.

[0011]

The synthetic resin nib of the present invention is formed by forming a writing surface on the tip of a flat writing portion having an ink passage therein, in which the ink passage is opened, obliquely to the axial direction. In the resin nib, since the long sides of the writing surface are substantially parallel to each other and the long sides of the cross section of the writing portion parallel to the writing surface are substantially parallel to each other, at any position on the writing surface. The bending and writing feel of the pen tip are almost the same, which is good not only for normal writing but also for writing at an angle. Ahead.

[Brief description of drawings]

FIG. 1 is a perspective view showing a pen tip of the present invention.

FIG. 2 is a side view showing the pen tip of the present invention.

FIG. 3 is a sectional view of the pen tip of the present invention.

FIG. 4 is a perspective view showing a conventional pen tip.

[Explanation of symbols] A synthetic resin nib 1 writing portion 2 ink passage 201 opening 3 writing surface 3'writing surface 301 long side 302 long side 303 one piece 311 long side 312 long side 3a wide portion 3b narrow portion 4 Side wall 401 Long equivalent part 5 Slit 6 Main part 601 Thick part

Claims (1)

[Claims] 1. A synthetic resin nib having a flat writing portion having an ink passage therein, and a writing surface having an opening for the ink passage formed obliquely with respect to the axial direction at the tip of the writing portion.
A synthetic resin pen tip, wherein long sides of the writing surface are substantially parallel to each other, and long sides of a cross section of a writing portion parallel to the writing surface are substantially parallel to each other.