JPH0211189Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ceramic pen nib having a groove-shaped ink passage, and is an attempt to improve the problem that dust accumulates in the ink passage during writing, which gradually causes poor writing.

Ceramic is extremely convenient as a nib material in that it has sufficient wear resistance. However, since it is not very flexible, it has the disadvantage that dust tends to accumulate in the ink passage.

To explain this with reference to FIG. 1, a ceramic pen nib 1 has a center hole 2 into which an ink relay core or the like is inserted, and an ink passage 3 formed as a single groove is connected to the center hole 2. It has reached writing tip 4. Now, pen tip 1 is used for writing. That is,
Suppose that it is moved onto the writing surface 5 in the direction of the tip mark A.
Then, since there is dust on the writing surface 5,
Dust enters the ink passage 3, and this dust enters in the direction of arrow B. As the dust gradually accumulates, it ends up blocking the ink passage 3. Since the ink passage 3 is located in a groove, that is, in the outer wall, it can be cleaned with a cloth or the like. However, if the dirt solidifies too much, it becomes difficult to clean it. If the material of the pen tip is flexible, it is possible to forcibly insert a wire or the like into the narrow ink passage 3 to clean it forcibly, but ceramics often break if forced. .

The present invention has been devised in view of the above-mentioned points, and one embodiment thereof is shown in FIG. Figure 2 and Figure 1
The difference from the figure is in the vicinity of the writing tip 40. That is, the ink passage 30 in the pen nib 10 in FIG. 2 is similar to the ink passage 3 in FIG. 1 in that it reaches the writing tip 40;
The end portion does not end at 0, but extends further toward the rear to form a terminal end portion 30a.

When the pen tip 10 is moved on the writing surface 5 in the direction of arrow C in order to use it for writing, dirt will enter in the direction of arrow D. That is, the reason why the dust entered in the direction of arrow B in FIG. 1 is because the bottom wall of the ink passage blocked the original direction of free entry of dust, but in FIG. There is no such hindrance due to As more and more trash invades, the trash that invaded before is pushed out more and more.
This result will be discharged to the outside of the pen tip 10. Therefore, there is no accumulation of dust, and long-term use is possible.

Below, some more preferable points and modifications will be described.

First, the bottom of the terminal end 30a is made to gradually become shallower. As shown in FIG. 2, this is to reduce the area occupied within the terminal end 30a, since the earlier the intrusion of the dirt, the more solidified it is. Furthermore, if the dust is sufficiently hardened, the hardened dust itself will serve as the wire when cleaning with a cloth or the like.

Next, the bottom wall of the terminal end 30a is made as smooth as possible. In the first place, the existence of the end portion 30a is easily understood because it prevents dirt from interfering with the original direction of intrusion.

In FIG. 2 as well, the bottom wall of the end portion 30a is drawn with a curvature.

Also, one modification is to eliminate the center hole 20. If the ink flows out through the ink channel 30, for example, the ink channel 30 can be a groove with a constant depth over the entire length except for the terminal end 30a, or it can be used as a dip pen type writing instrument. Even in this case, the center hole 20 may not be provided.

Next, the width of the terminal end 30a (groove width; vertical direction in the drawing)
does not need to be constant either. For example, by forming the groove so that it becomes gradually shallower (as described above) and wider, it is also possible to suppress solidification of dirt that has previously entered. If the ink passage 30 is too wide, the capillary force will be insufficient, resulting in ink dripping or ink movement in the opposite direction (so-called ink descent), so it is necessary to set the ink passage 30, but as the end portion 30a gradually becomes wider, Just because you're used to it doesn't mean it causes problems like this.

As described above, according to the present invention, the groove-shaped ink passage located on the outer wall and reaching the writing tip does not terminate at the writing tip, but is further provided with a ceramic ink passage having an end portion extending toward the rear of the writing tip. Since the nib is made of aluminum, dirt that has entered the ink passage will not be discharged outside and accumulate, allowing long-term use.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part showing an example of a ceramic pen nib having a groove-shaped ink passage, and FIG. 2 is a longitudinal cross-sectional view of a main part showing an embodiment of the present invention. 1, 10... Pen tip, 2, 20... Center hole,
3, 30... Ink passage, 30a... Terminal part,
4, 40... writing tip, 5... writing surface.

Claims (1)

[Scope of utility model registration request] A ceramic pen nib having a groove-shaped ink passage, wherein the ink passage located on the outer wall and reaching the writing tip does not terminate at the writing tip, but further includes a terminal portion extending toward the rear of the nib. Ceramic pen nib is characterized by the following: