JP2003089292A - Fountain pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem such as the provision of a hard writing experience of the pen point of a fountain pen due to the lack of an elasticity at the root of the pen point under the condition being integrally formed with the outer periphery of a barrel through the formation of the pen point is executed by removing some part of a tubular body on the fountain pen, in which the tubular body is employed as the barrel and, at the same time, the pen point is formed at the forward part of the barrel by removing the closed end part of the metal tubular body with one end open. SOLUTION: An ink flow passage is formed by providing a slot extending from a tip backwards at the tip part of the pen point. At the same time, slits are formed on both the sides on an outer edge pinching the slot therebetween.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a closed end of a cylindrical body, which is made of metal and closing the one end thereof, to make the cylindrical body a shaft cylinder. The present invention relates to a fountain pen having a pen point formed at a front portion of a barrel. 2. Description of the Related Art Conventionally, by cutting or cutting the closed end of a cylindrical body having one end closed by metal, the cylindrical body is used as a shaft cylinder, and a front portion of the shaft cylinder is formed. A fountain pen formed integrally with a pen tip is known. The fountain pen formed in this way has a simpler structure than a normal fountain pen in which the pen tip and the barrel are separate members, and is less costly due to less man-hours and the number of members. The silhouette that has a unified flow over has a unique design. [0003] However, since the pen tip of such a fountain pen is formed by removing a part of the cylindrical body, the root of the pen tip is in contact with the outer periphery of the shaft cylinder. It was formed in one piece, had poor elasticity, and had a hard writing taste. According to the present invention, a fountain pen is formed by removing a closed end of a cylindrical body made of metal and closing the cylindrical body and forming a pen point at a front portion of the cylindrical body. The purpose is to make the writing taste smooth. [0005] Next, a fountain pen of the present invention devised to solve the above-mentioned problems will be described. "1. In a fountain pen formed by removing a closed end portion of a cylindrical body having one end closed by a metal and thereby forming the cylindrical body into a barrel and forming a pen tip in a front part of the barrel, A slit is formed at the front end to extend rearward from the front end to form an ink flow path, and slits are formed on both sides of an outer edge with the cut in between to increase the amount of deformation of the pen tip with respect to writing pressure. In the present invention, the pen tip is provided with a slit extending rearward from the tip to form an ink flow path, and the slit is formed on both sides of the outer edge with the slit interposed therebetween. The reason for this is that by forming a slit in the pen, the amount of deformation of the pen tip with respect to the pen pressure is increased, and the writing quality is smoothened. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings to facilitate understanding. FIG. 1 is a view showing one state of the fountain pen according to the present embodiment at the time of assembly. In FIG. 1, a fountain pen 1 comprises a front barrel 2, a rear barrel 3, and a connecting barrel 4 for screwing the front barrel 2 and the rear barrel 3 together.
Is provided with a pen tip 5 at the front, and although not shown, an inner core is mounted in the front barrel 2 to form a fountain pen. A slit 5a serving as an ink flow path is formed at the center of the pen tip 5, and slits 5 are formed on both sides of an outer edge 5b across the slit 5a.
c is formed. The step of forming the pen tip in the front barrel 2 will be described in detail. FIG. 2 is a view showing the concept when forming the front barrel and the pen tip from the tubular body. In FIG. 2, a tubular body 20 is made of stainless steel formed by squeezing, and has a closed end 2a which is closed at a front end.
The rear end is provided with an open end 2b which is open. First, the closed end 2a of the tubular body 20 is removed by punching using a press machine to form the pen tip 5, and a heart hole 5d is formed. Next, after a pen point (not shown) made of iridosmine is welded to the tip of the pen tip 5, a slit 5a is formed at the center of the pen tip 5 by grinding with a grindstone.
Finally, slits 5c that are inclined at approximately 45 degrees with respect to the slit 5a are formed symmetrically on both sides of the outer edge 5b with the slit 5a formed at the center of the pen tip 5 formed by grinding using a grindstone. FIG. 3 is a view showing a main part of the embodiment. FIG. 4 is a plan view of FIG. 3 as viewed from above. FIG. 5 is a side view showing the concept when pen pressure is applied to the pen tip. As shown in the figure, in the present embodiment, the base 5d of the pen tip 5 is integrated with the front outer peripheral portion 2c of the front barrel 2, but a slit 5c is formed in the outer edge 5b of the pen tip 5. Therefore, the amount of deformation of the pen tip 5 with respect to the pen pressure can be increased. As described above, the fountain pen of the present invention removes the closed end of a cylindrical body having one end closed by metal, thereby forming the cylindrical body into a shaft cylinder and removing the cylindrical body from the shaft. Even with a fountain pen with a pen tip formed on the front part, the amount of deformation of the pen tip with respect to pen pressure can be increased by forming slits on both sides of the outer edge across the slit, so that writing taste Became smooth.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing one state of a fountain pen of the present embodiment at the time of assembly. FIG. 2 is a view schematically showing a case where a pen tip and a front barrel are formed from a tubular body. FIG. 3 is a view showing a main part of the embodiment. FIG. 4 is a plan view of FIG. 3 viewed from above. FIG. 5 is a side view showing a concept when pen pressure is applied to a pen tip. [Description of References] 1 ... fountain pen, 2 ... front shaft barrel, 2a ... closed end portion, 2b ... closed end portion, 2c ... front outer peripheral portion, 20 ... cylindrical body, 3 ... rear shaft barrel, 4 ... connection cylinder 5: Pen tip, 5a: Split, 5b: Outer edge, 5c: Slit, 5d: Root.

Claims (1)

Claims: 1. A cylindrical body is formed by removing a closed end of a cylindrical body having one end closed by metal, and a pen tip is formed at a front portion of the cylindrical body. Fountain pen
The tip of the pen tip is provided with a slit extending rearward from the tip to form an ink flow path, and slits are formed on both sides of the outer edge across the slit to increase the amount of deformation of the pen tip with respect to writing pressure. A fountain pen characterized by doing.