JPS5845089Y2 - writing instrument nib - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to improving the pen nib of a writing instrument, and provides a pen nib that is characterized in that it can be used for fine or bold characters depending on the amount of writing pressure.

Conventionally, a single writing instrument can be used for writing fine and bold characters, and one end of the barrel is equipped with a nib for bold characters and the other end is equipped with a nib for fine characters, or a pen nib for bold characters is used. It is known that an adapter is detachably attached to the tip of the pen so that the end of a fine point nib held by the adapter comes into contact with the tip of the adapter.

However, the former method has disadvantages in that it is inconvenient to have to change the writing instrument during use, and that the structure is complicated and the number of parts is large, resulting in high cost.

In addition, the latter requires the adapter to be attached and removed each time, which is inconvenient, and when using a pen nib for thick text, the nib for fine text must be stored in an airtight container, otherwise it will dry out and become clogged, making it unusable. There are drawbacks.

It also has the disadvantage of increasing costs due to the increased number of parts.

The present invention attempts to eliminate such drawbacks.

FIG. 1 shows an embodiment of the present invention.

A is the pen tip.

The pen nib A consists of a bold nib 1 and a fine nib 2. The bold nib 1 is made of felt, a resin-processed fiber bundle, a sintered body of synthetic resin, etc. An insertion hole 3 is formed from the tip 1' by hand, such as by grinding or molding.

An elastic body made of a material that can be compressed and restored, such as a spring, rubber, or sponge, is inserted into the bottom 3' of the insertion hole 3, and the upper part is made of felt and resin-treated fiber bundle 5, which is a sintered body of synthetic resin. Alternatively, a fine-character pen nib 2 made of a synthetic resin rod or the like having an ink flow gap in the center is inserted.

The tip 2 for fine print has its end 2'' at the tip 4' of the elastic body 4.
The tip 2' is in contact with the tip 1 of the bold pen nib 1.
', and is slidable in the insertion hole 3.

The length of the nib 2 for fine print is such that when the elastic body 4 is compressed by pressing the tip 2' of the nib 2, the tip 2' of the nib 2 is always on the same surface as the tip 1' of the nib 1. It is formed to the desired length.

It goes without saying that the pen tip 2 should be slidably inserted so that the contact area with the pen tip 1 is large so that the ink can flow more smoothly than the pen tip 1. If it is made of a material having an ink flow gap, such as sponge or foam rubber, ink will be sucked even from the distal end 2'' of the nib 2, so that the ink will flow more smoothly.

In addition, in order to prevent the pen tip 2 from easily falling off from the insertion hole, the end of the elastic body 4 and the bottom of the insertion hole 3 are engaged, and the tip of the elastic body 4 and the end of the pen tip 2 are engaged by means such as fitting. Needless to say, it may be configured to stop the process.

Furthermore, when using a synthetic resin nib having an ink flow gap in the center, it is of course possible to cut the outer periphery of the insertion portion to expose the ink flow gap before inserting the nib.

In use, first, as shown in FIG. 2, the writing instrument B is assembled by attaching the pen nib A to the tip of the barrel 5 and bringing the end of the bold nib 1 into contact with the ink absorber 6.

When it is desired to write fine characters, the pen nib 2 for fine characters protruded from the nib 1 for bold characters by the elastic body 4 is used for writing.

When you want to write bold characters, apply a little strong writing pressure to the tip 2' of the nib 2 for fine characters to compress the elastic body 4, as shown in Figure 3, so that the tip 2' of the nib 2 for fine characters is Write by immersing the pen into the pen until it is flush with the tip 1' of the nib 1.

That is, by making the tip 2' of the pen nib 2 for fine letters and the tip 1' of the pen nib 1 for bold letters on the same surface, bold letters can be written.

Since the present invention is constructed as described above, it is convenient because it can be easily used for bold or thin characters simply by changing the amount of pressure applied, and the structure is simple and the number of parts is small, resulting in low cost. has.

[Brief explanation of the drawing]

FIG. 1 is a central vertical cross-sectional view of an embodiment of the pen nib of the present invention, FIG. 2 is an explanatory diagram showing how it is used for fine characters, and FIG. 3 is an explanatory diagram showing how it is used for bold characters. 1... Pen nib, 1... Bold nib,
1'... Tip of the pen tip for bold letters, 2... Tip of the pen tip for fine letters, 2'... Tip of the pen tip for fine letters, 3.
...Insertion hole, 4...Elastic body.

Claims (1)

[Scope of utility model registration request] An insertion hole is drilled in the central axial direction of the bold type nib from the tip, and an elastic body that can be compressed and decompressed is inserted into the bottom of the insertion hole. It is attached to the tip of the elastic body, and the tip is slidably inserted so that it protrudes beyond the tip of the nib for fine type, and when the tip of the nib for fine type is pressed strongly, the elastic body contracts and the tip of the nib for fine type is inserted. A pen nib for a writing instrument, characterized in that the tip of the nib is configured to be flush with the tip of a bold nib.