JPS6316544Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a fountain pen, and more specifically, to an improvement of a variable elasticity fountain pen in which the character width can be changed by sliding a tongue piece on the pen tip.

The handwriting of pen characters is a line width that is not thick or thin, giving the pen tip a hard elasticity. Additionally, if the pen tip is given soft elasticity, a thick line will appear depending on the amount of pressure applied during writing. There has been a strong demand for a long time for a single fountain pen to be able to provide a large change in character width so that it can handle any type of handwriting.

Typical proposals for variable pen tip elasticity and variable handwriting include, for example, the Showa
2010 Utility Model Application Publication No. 11314 (Document A), Showa
There are 2012 Utility Model Application Publication No. 7061 (Document B) and Utility Model Publication No. 1972-22646 (Document C).

In Document A, parallel grooves are provided on both sides of the pen nib cutout, and both ends of the moving tool are slidably engaged with these grooves. Since it moves back and forth, it is difficult to make subtle adjustments between bold and thin characters. Furthermore, if the moving tool moves erratically and the slits tend to open, and if the slits open too much due to strong writing pressure, the capillary action of the slits will no longer work, making it impossible to draw out ink. Furthermore, when providing side grooves on a pen nib, elasticity is generally required for the writing part of the pen nib, which is divided into left and right sides by a cut. This requires a tedious process of carving.

In Document B, non-parallel notches are provided on both sides of the center line of the pen tip, and a protrusion is formed by bending the cutout outward in a U-shape, and a side groove provided on the moving tool is attached to this protrusion. A pin that is slidably engaged and is in contact with the moving tool at the fine point adjustment position is provided, but the protrusion is not provided at a position that pinches the cut of the pen tip, and with this configuration alone, the moving tool cannot be moved forward or backward. Even if you do so, it is extremely difficult to change the font width. Further, when the protrusion is provided on the pen tip, troublesome processing is required as in the case of Document A mentioned above. Furthermore, it is difficult to adjust from fine to bold because there is no means to move the moving tool back and forth by holding it by hand and to stop the moving tool at the bold adjustment position.

The one in Document C attaches the pen tip to the pen core,
Insert the pen nib and nib into the nib cover, attach the rotating ring to the nib cover, and place a moving tool on the top of the nib that moves back and forth by the rotation of the rotating ring. On both sides, there are cuts and gently sloping side grooves that open at the front.
A protrusion provided on the moving tool is slidably engaged with this side groove. However, when the above-mentioned side groove is provided on the pen tip and the protrusion of the moving tool is fitted into this side groove as in this proposal, in addition to the trouble of providing the side groove on the pen tip as described in the above-mentioned document A, the side groove is Since it is cut and sloped so that it opens at the front, the protrusion squeezes the entire length of the gutter, so the slope of the gutter and the installation position and shape of the protrusion must be considered so that the protrusion can slide smoothly along the gutter. Precise machining is always required.

This invention improves the above-mentioned drawbacks, and provides a fountain pen that prevents the moving tool from moving unnecessarily during pen stroke, prevents the cutout from opening too much due to pen pressure, allows delicate adjustment of bold and thin characters, and is easy to manufacture. The purpose is to

Therefore, this idea attaches the pen tip to the pen core, inserts the pen tip and the pen core into the pen core cover,
A rotating ring is attached to the pen nib cover, and a tongue piece that moves back and forth as the rotating ring rotates is placed on the top of the nib, and pin-shaped protrusions are formed on both sides of the nib, sandwiching the cut in the nib. The protrusion is inserted into a notch hole formed in the tongue piece, and the notch hole has abutment portions arranged at the front and back of the protrusion in a direction transverse to the cutout, and the tongue piece is placed in the fine adjustment position between the abutment portions. A narrow part that contacts the protrusion when the tongue is in the bold position, and a wide part that forms a gap between the protrusion and the tongue when the tongue is in the bold adjustment position.

This idea will be explained below with reference to the drawings.

The fountain pen shown in FIGS. 1 and 2 has a pen nib 2 attached to a pen core 1, and the pen nib 2 has a concavely curved cross section, has two cuts 3, and a writing end 4 are in contact with each other. Pen tip 2 has a cut 3
Pin-shaped protrusions 5 are formed on both sides of the pen core 1, and the pen core 1 and the pen tip 2 are inserted into a pen core cover 6.

A rotary ring 7 is attached to the pen core cover 6, and a spiral groove 8 is formed on the inner peripheral surface of the rotary ring 7. The rotating ring 7 is supported by a flange 9 provided at the pen-side tip of the pen core cover 6 and a grip tube 10 inserted into the rear part of the pen core cover 6 so as not to come off. Also,
A protrusion 12 protruding from the surface of the tongue piece 11 on the side opposite to the pen side is engaged with the spiral groove 8 of the rotating ring 7. The side of the tongue piece 11 opposite to the pen side passes through the tunnel-shaped guide hole 13 of the flange 9 and extends on the extension line of the guide hole 13 of the pen core cover 6 so as to prevent the tongue piece 11 from wobbling laterally. It is fitted into the groove 14 provided.

A notch hole 17 is provided on the pen side of the tongue piece 11, and the protrusion 5 of the pen tip 2 is inserted into the notch hole 17. The notch hole 17 has contact portions 17b and 17 arranged at the front and rear of the protrusion 5 in the direction across the cut 3.
c, and between the abutting parts 17b and 17c, the narrow part 15 contacts the protrusion 5 when the tongue piece 11 is in the fine adjustment position, and the protrusion 5 when the tongue piece 11 is in the bold adjustment position. A wide portion 16 is provided to form a gap therebetween, and the overall shape of the cutout hole 17 is wedge-shaped with the narrow portion 15 and the wide portion 16.

If you want to make the pen tip 2 more elastic, rotate the rotary ring 7 to the right in FIG.
When the notch hole 17 is moved forward, the narrow portion 15 of the notch hole 17 moves to the protrusion 5, and the protrusion 5 comes into contact with the side edge 17a as the narrow portion 15 and the contact portion 17c. Collision part 17
When the protrusion 5 comes into contact with c, the fine character adjustment position is reached, and the contact of the protrusion 5 with the narrow width portion 15 makes it difficult to open the cutout 3 during writing, and the elasticity of the nib 2 becomes hard, resulting in a narrow character width. become.

Next, a case will be described in which the pen tip 2 is adjusted to be bold.

Rotating ring 7 is rotated in the opposite direction to that described above to retract tongue piece 11. Then, the wide portion 16 of the notch hole 17 moves to the projection 5 (FIG. 1). When the protrusion 5 contacts the contact portion 17b, the bold adjustment position is reached. When in the bold adjustment position, the protrusion 5 and the wide part 16
Since a gap is created between the protrusion 5 and the side edge 17a, the curvature and deformation of the writing part from the writing end 4 of the nib 2 to the back end of the cutout 3 due to writing pressure when writing is caused by the displacement of the protrusion 5 being caused by the side edge 17a. The process is limited by the above-mentioned gap and is carried out only within the range of the above-mentioned gap. Therefore, even if the writing pressure is increased, the cutout 3 is prevented from opening too much, and the ink is smoothly transferred to the paper surface.

In this example, the tongue piece 11 is formed of two parts, a tongue piece body 18 and a driven piece 19, and the tongue piece body 18 and the driven piece 19 are connected with the protrusion 20 loosely fitting into the elongated hole 21. The elongated hole 21 is provided so that its center line crosses the longitudinal direction of the tongue piece body 18. By combining the two in this manner, manufacturing errors in the protrusion 5 of the pen tip 2 and the notch hole 17 in the driven piece 19 can be absorbed by the play of the protrusion 20 with respect to the elongated hole 21.

Although the notch hole 17 shown in the above example has the wide portion 16 formed on the pen side, the same effect can be obtained by using a notch hole with the wide portion 16 formed on the side opposite to the pen side. It is effective.

The effects of this invention are as follows.

When the tongue piece is in the bold adjustment position, a wide part is formed in a part of the notch hole that forms a gap between it and the protrusion, and the writing part that extends from the writing end of the pen tip to the back end of the cutout due to writing pressure is formed. Since the bending and deformation are performed within the range of the gap, it is possible to prevent the cut from opening too much due to strong writing pressure.

Since the tongue piece is moved back and forth by the rotation of the rotating ring, the tongue piece does not move randomly when writing.

Since pin-shaped protrusions are provided on both sides of the cutout of the pen tip, thin and bold letters can be obtained by engaging the notch holes with the protrusions and moving the tongue piece back and forth.

Since the notch hole has abutting portions arranged in front and behind the protrusion in the direction across the cut, the tongue piece can be stopped at the bold adjustment position and the fine adjustment position, allowing delicate adjustment of the bold and fine characters.

A pin-shaped protrusion is provided on the pen tip, and a notch hole is provided on the tongue so that when the tongue moves back and forth, the protrusion contacts the narrow part but does not contact the wide part, so the side groove is not parallel to the pen tip. Compared to the case where the entire length of the gutter is squeezed with protrusions, troublesome and precise machining is not required.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a part of the fountain pen of this invention, and FIG. 2 is a longitudinal sectional view thereof. 1...Pen core, 2...Nib, 3...Cut, 4
...Writing end, 5...Protrusion, 6...Pen nib cover,
7... Rotating ring, 11... Tongue piece, 15... Narrow part of notch hole, 16... Wide part of notch hole, 17
... Notch hole, 17b, 17c... Contact portion.

Claims (1)

[Scope of utility model registration request] The pen nib 2 is attached to the pen core 1, the pen nib 2 and the pen core 1 are inserted into the pen core cover 6, the rotating ring 7 is attached to the pen core cover 6, and the tongue piece moves back and forth by the rotation of the rotating ring 7. 11 is disposed on the upper surface of the pen nib 2, and pin-shaped protrusions 5 are formed on both sides of the cutout 3 of the nib 2.
is inserted into a notch hole 17 formed in the tongue piece 11, and the notch hole 17 has abutting portions 17b, 17c arranged before and after the protrusion 5 in the direction across the cutout 3, and the abutting portions 17b, 17c, a narrow width portion 15 with which the protrusion 5 contacts when the tongue piece 11 is in the narrow adjustment position;
This fountain pen is provided with a wide part 16 that forms a gap with the protrusion 5 when the tongue piece 11 is in the bold adjustment position.