JPH05480U - Synthetic resin nib - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a synthetic resin nib that has a tip that does not "break" and that has excellent durability and that can copy slips and the like with one writing. [Structure] A plurality of ink grooves 1 are formed from the tip to the outer periphery of a synthetic resin main body 11 having a conical cylindrical tip and a closed end surface.
3 is formed in the vertical direction so that the rear end portion of the ink groove 13 communicates with the ink supply hole 12 inside the main body 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pen tip made of synthetic resin.

[0002]

[Prior art and its problems]

 Metal nibs, such as the fountain pen nibs, have excellent durability but are costly. In addition, the tip of the fountain pen has an asymmetrical tip and has a directivity in writing, so a fountain pen with a metal non-directional nib with a hemispherical tip is also in practical use. Like a ballpoint pen, a fountain pen equipped with this non-directional pen tip is a single writing that superimposes multiple slips and writes only the outermost slip paper, and copies it onto the second and subsequent slip papers. However, there are many manufacturing processes for the pen tip, and it takes time to manufacture. On the other hand, a synthetic resin nib is easy to manufacture and low in cost, and it has no directionality and provides a soft writing feel, but it has low rigidity and low wear resistance and poor durability.

By the way, recently, many disposable writing instruments that do not change ink have been put into practical use, and a cheap synthetic resin tip is suitable as the pen tip of such writing instruments. A conventional synthetic resin nib is a cylindrical body having an ink supply hole with high ink holding power inside, and ink is ejected from the tip of the ink supply hole for writing. In other words, since there is a hole at the tip of the pen tip, a vertical crack easily occurs during use, causing "distortion", and it becomes impossible to write in a very short period of time. It was sometimes unsuitable as a pen tip for writing instruments. Also, due to its low rigidity, it is not possible to duplicate slips with one writing.

[0004]

[The purpose of the device]

 Therefore, an object of the present invention is to provide a synthetic resin pen tip which has excellent durability and does not "break" at the tip, and which can also be copied in one writing.

[0005]

[Constitution of the device and its action]

 The synthetic resin nib of the present invention has a conical cylinder-shaped tip, and a plurality of ink grooves are vertically formed from the tip on the outer periphery of the main body with the tip surface closed, and the rear end of the ink groove is the main body. It is characterized by communicating with the ink supply hole inside.

That is, since the tip surface of the pen tip is closed and the ink is supplied to the writing surface from the vertical ink groove formed on the outer circumference, the tip does not “distribute” and is durable. The property is improved. In addition, the tip end surface of the pen tip is closed and the tip end has a conical cylindrical shape, so the rigidity is increased, and it becomes possible to copy slips with one writing.

[0007]

【Example】

 The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 3 shows an example of a disposable writing instrument, in which the pen tip 1 according to the present invention is held by a holder 4 and attached to the tip of a barrel 2. The inside of the barrel 2 is an ink chamber 3, and a pen core 5 having an ink retaining function is arranged between the ink chamber 3 and the nib 1. Then, the ink filled in the ink chamber 3 is supplied to the pen tip 1 through the pen core 5.

Here, as shown in FIG. 1, the main body 11 of the pen nib 1 is a cylindrical body molded of hard synthetic resin, and the inside thereof is an ink supply hole 12, but the tip is a cone. It has a tubular shape. The conical tube-shaped tip is integrally formed with the plug portion 14, and the tip surface is closed. Then, from the tip of the main body 11, as shown in FIG. 2, six ink grooves 13 having a length of 25 mm and a width of 0.1 mm are formed at equal intervals in the vertical direction. The end communicates with the ink supply hole 12. It should be noted that each ink groove 13 may extend in the direction of the plug portion 14 and be connected to each other at the tip surface. As described above, since the pen tip of the present invention has a simple shape and is integrally molded of synthetic resin, it can be manufactured very easily.

Then, the ink in the ink supply hole 12 is supplied to the ink groove 13 to enable writing, but since the tip surface of the main body 11 is closed by the plug portion 14, that is, the ink is attached to the tip of the main body 11. Since there is no discharge opening, the strength of the tip is high, cracks are hard to occur, and the tip does not "break". Therefore, the durability is improved and sufficient durability can be obtained as a pen tip for a disposable writing instrument. In addition, since the tip of the main body 11 is closed by the stopper 14 and the tip is conical, the rigidity is extremely high compared to conventional synthetic resin nibs, and slips can be written with one writing. Can be copied.

[0010]

[Effect of the device]

 As described above, the pen tip of the present invention has a plurality of ink grooves formed vertically from the tip on the outer periphery of the synthetic resin body with the tip surface closed, and the rear end of the ink groove is inside the body. Since it is communicated with the ink supply hole of the, the tip has high strength, the tip does not "distribute" and the durability is improved, and it becomes possible to duplicate the slips with one writing.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram of a disposable writing instrument.

[Explanation of reference symbols] 1 Pen tip 11 Main body 12 Ink supply hole 13 Ink groove 14 Plug part 2 Shaft cylinder 3 Ink chamber 4 Holder 5 Pen core

Claims (1)

[Claims for utility model registration] [Claim 1] A plurality of ink grooves are formed in the vertical direction from the tip to the outer periphery of the main body, the tip of which is a conical cylindrical shape, and the rear end of the ink groove. A nib made of synthetic resin, characterized in that the part communicates with the ink supply hole inside the main body.