JP4854888B2 - fountain pen - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a fountain pen formed by removing a closed end portion of a cylindrical body whose one end is made of metal, thereby forming the cylindrical body as a shaft cylinder and forming a nib at the front portion of the shaft cylinder.
[0002]
[Prior art]
Conventionally, by removing the closed end portion of the cylindrical body with one end made of metal by cutting or cutting, the cylindrical body is made into a shaft cylinder, and the pen tip is integrally formed at the front portion of the shaft cylinder. The fountain pen is known. The fountain pen formed in this way has a simple structure compared to a normal fountain pen with a separate nib and shaft, and has fewer man-hours and parts. The silhouette with an integrated flow through has a unique design.
[0003]
[Problems to be solved by the invention]
However, since the pen tip of such a fountain pen is formed in a form that removes a part of the cylindrical body, the base of the pen tip is formed integrally with the outer periphery of the shaft tube, and is not very elastic. The writing taste was hard.
[0004]
The present invention eliminates the closed end portion of a cylindrical body having one end closed made of metal, thereby making the cylindrical body a shaft cylinder and forming a pen tip at the front portion of the shaft cylinder. The purpose is to smooth.
[0005]
[Means for Solving the Problems]
Next, the fountain pen of the present invention devised to solve the above problems will be described. The present invention
“In a fountain pen formed by removing the closed end of a cylindrical body made of stainless steel and closing the end of the cylindrical body, the cylindrical body is made into a shaft cylinder and a pen tip is formed in the front part of the shaft cylinder. After the ink passage is formed by providing a slit that extends rearward from the tip to the tip portion by grinding with a grindstone, the slit is straightened by grinding with a grindstone on both sides of the outer edge across the slit. A fountain pen characterized in that the amount of deformation of the pen tip with respect to pen pressure is increased by forming a slit inclined with respect to the stroke so that the rear end of the slit is located behind the rear end of the slit . Is.
[0006]
In the present invention, a slit extending from the tip to the rear is provided at the tip of the pen tip to form an ink flow path, and slits are formed on both sides of the outer edge across the slit. By doing so, the amount of deformation of the pen tip with respect to the writing pressure is increased, and the writing quality is made smoother.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In order to facilitate understanding of the present invention, description will be made with reference to the drawings. FIG. 1 is a diagram showing a state when the fountain pen of the present embodiment is assembled. In FIG. 1, a fountain pen 1 is composed of a front shaft cylinder 2, a rear shaft cylinder 3, and a connection cylinder 4 that screw-connects the front shaft cylinder 2 and the rear shaft cylinder 3, and the front shaft cylinder 2 is penned forward. A tip 5 is provided, and although not shown, an inner core is mounted in the front barrel 2 to form a fountain pen. Further, a slit 5a serving as an ink flow path is formed at the center of the nib 5, and slits 5c are formed on both sides of the outer edge 5b sandwiching the slit 5a.
[0008]
The step of forming the pen tip portion in the front barrel 2 will be described in detail. FIG. 2 is a diagram showing a concept when a front shaft cylinder and a pen tip are formed from a cylindrical body. In FIG. 2, a cylindrical body 20 is made of stainless steel formed by squeezing, and has a closed end 2a closed at the front end and an open end 2b opened at the rear end. First, the closed end 2a of the cylindrical body 20 is removed by punching using a press machine to form the pen tip 5, and the heart hole 5d is drilled. Next, after a pen point (not shown) made of iridosmin is welded to the tip of the nib 5, a slit 5a is formed at the center of the nib 5 by grinding with a grindstone. Finally, slits 5c that are inclined at about 45 degrees with respect to the cut 5a are formed symmetrically on both sides of the outer edge 5b sandwiching the cut 5a formed at the center of the pen tip 5 by grinding with a grindstone.
[0009]
FIG. 3 is a diagram showing the main part of the present embodiment. FIG. 4 is a plan view of FIG. 3 as viewed from above. FIG. 5 is a side view showing a concept when writing pressure is applied to the pen tip. As shown in the figure, in the present embodiment, the root 5d of the pen tip 5 is integrated with the front outer peripheral portion 2c of the front shaft cylinder 2, but a slit 5c is formed on the outer edge 5b of the pen tip 5. Therefore, the deformation amount of the pen tip 5 with respect to the writing pressure can be increased.
[0010]
【The invention's effect】
As described above, the fountain pen of the present invention removes the closed end portion of the cylindrical body made of stainless steel, thereby forming the cylindrical body as a shaft cylinder and forming the pen tip at the front portion of the shaft cylinder. Even with a fountain pen, the slits are formed on both sides of the outer edge across the slit, so that the amount of deformation of the pen tip with respect to the pen pressure can be increased. Brief Description of Drawings]
FIG. 1 is a diagram showing a state at the time of assembly of a fountain pen according to an embodiment of the present invention.
FIG. 2 is a diagram showing an outline when a pen tip and a front shaft cylinder are formed from a cylindrical body.
FIG. 3 is a diagram showing a main part of the embodiment.
4 is a plan view of FIG. 3 as viewed from above. FIG.
FIG. 5 is a side view showing a concept when pen pressure is applied to the pen tip.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Fountain pen, 2 ... Front axial cylinder, 2a ... Closed end part, 2b ... Closed end part, 2c ... Front outer peripheral part,
20 ... cylindrical body,
3 ... rear shaft cylinder, 4 ... connection cylinder,
5 ... nib, 5a ... slitting, 5b ... outer edge, 5c ... slit, 5d ... root.

Claims (1)

In the fountain pen formed by removing the closed end portion of the cylindrical body made of stainless steel and closing the end of the cylindrical body, the cylindrical body serves as a shaft cylinder and the pen tip is formed at the front portion of the shaft cylinder. After forming an ink flow path with a grinding process with a grindstone in the part extending linearly from the tip to the back, the ink passage is formed on both sides of the outer edge across the cut with a grinding process with a grindstone. The fountain pen is characterized in that the amount of deformation of the pen tip with respect to the pen pressure is increased by forming a slit inclined with respect to the pen so that the rear end of the slit is located behind the rear end of the slit .

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