JPS6258320B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fountain pen, and particularly to a fountain pen equipped with a device that allows stepless adjustment of the elasticity of the pen.

The handwriting of pen characters either becomes a line width without being thick or thin when the pen used is given hard elasticity, or the line width becomes thick or thin depending on the direction of the stroke. On the other hand, if a pen is given soft elasticity, the width of the line will become thicker and thinner depending on the amount of pressure applied during the stroke, rather than the direction of the stroke.

There has been a strong demand for a long time for a single fountain pen to be able to handle all types of handwriting. However, no fountain pen that meets these requirements has ever been put to practical use.

Typical proposals for fountain pens with variable elasticity and variable handwriting include, for example, the Taisho
There is a utility model application publication number 30484 in 2015. According to this, stepless adjustment of the elasticity of the pen is performed by moving a presser foot placed on the top surface of the pen back and forth through a tunnel-shaped guide provided on the pen. The back and forth movement of the presser foot is performed in conjunction with the rotation of a rotating ring placed at the tip of the barrel. This idea is based on the fact that the rotating direction of the rotating ring is different from the direction of the back and forth movement of the presser foot, so that the force in the rotating direction transmitted from the rotating ring is transmitted to the pen via the guide, deforming the pen, and due to the presence of the guide. This has drawbacks such as having a negative effect on the elasticity of the pen and making such a guide difficult to manufacture, making it impractical in practice.

The present inventor completed the present invention as a result of intensive research in order to provide a fountain pen that improves the above-mentioned drawbacks.

Fountain pens originally did not have a cut that guides the ink to the writing tip. Next, the tip of a fountain pen, which provides the writing experience, is determined in large part by the elasticity from the vicinity of the cut closed end to the writing tip. Factors related to elasticity depend on the structure of the pen itself and the metal material used, but the length of the tip also has a large effect.

In this way, elasticity is a problem, but as mentioned above, the tip part is divided into left and right parts by cutting, so in addition to what kind of elasticity the left and right parts of the tip part have relative to each other, there is also a question of how much the left and right parts of the tip part have. Various problems arise depending on the opening resistance.

As described above, many factors are involved in the writing quality and thickness of a fountain pen, making it difficult to easily obtain a fountain pen with the desired writing quality.

As a result of various studies, the present inventor has found that fountain pens have a delicate writing feel, and applying external force to the pen itself will definitely have a negative effect on the performance of the pen, and in particular, twisting stress on the pen give a fatal flaw. Therefore, applying twisting stress must be absolutely avoided. Next, if you press the left and right sides of the tip of the pen with uneven force, the tip of the pen will be misaligned, and if it is too large, it will become impossible to write. Next, with this type of fountain pen that uses a rotating ring to move the presser foot, ink tends to enter the interior from the pen side, so at least prevent ink from leaking from between the rotating ring and the barrel, so that it does not get in the way of hands, etc. It is necessary to eliminate dirt.

Based on this knowledge, the inventor of the present invention has conducted various studies and found that in order to change the writing feel and handwriting with a single fountain pen, the pen must be held down by some means, even though there is a risk of many defects. That is, it has been found that the writing feel and handwriting cannot be continuously changed unless a presser foot is slidably disposed on the top surface of the pen and a pressing force is applied to the top surface of the pen. In order to solve the above-mentioned drawbacks, various studies were conducted and it was discovered that the pen itself should not be modified with any accessories or deformations, and that twisting and force imbalance should be avoided. The present invention was completed based on these findings.

That is, the present invention includes: (A) a pen core cover into which a pen core with a pen attached is inserted and having a fitting portion with a cylindrical body; (B) a pen core cover provided at the tip end on the pen side of the pen core cover; (C) a presser foot that has a tip that contacts the pen and a moving knob and that is guided by the guide hole; (D ) It has a connecting part that connects with the fitting part of the pen core cover, a cutout that slidably fits with the moving knob of the presser foot, and a barrel connecting part, and it is inserted into the pen core cover together with the presser foot. The connected cylindrical bodies, (E) the rotary transfer cylinder which is rotatably inserted into the pen nib cover by fitting the feed groove provided on the inner surface with the movement knob of the presser foot, and (F) the pen nib cover and its attachment and detachment. This fountain pen consists of a barrel that can be freely inserted and connected to a barrel coupling part of a cylindrical body.

In the present invention, the guide part is provided at the tip of the pen core cover on the pen side, but in order to prevent the guided presser foot from moving left and right, it is necessary to place the guide hole as close to the pen as possible to prevent horizontal shaking. This is because it is extremely effective. Lateral movement of the presser foot causes an imbalance in the force applied to the pen, resulting in a fatal defect. The guide hole may be a tunnel-shaped hole in addition to a groove, but a tunnel-shaped guide hole is extremely effective when particularly strong pressing is required. One or more guide holes may be provided, but they must be provided in the pen core cover and should not be provided in the pen. The guide portion forming the guide hole can be formed by protrusions of various shapes, and among these, a flange that acts as a stopper for the rotary transfer cylinder can be used. In addition, the guide portion may be formed of a projection forming a groove-shaped guide hole and a nut threadedly engaged with the outer periphery of the projection.

The tip of the presser foot must be in a position where it makes contact with the pen.

The presser foot is preferably a flexible presser foot that has a tip that contacts the pen, is curved toward the pen, and has a gap between the portion other than the tip and the pen.
This is because, in general, fountain pens have the force that when you flip the left and right sides of the tip upward and downward, the left and right sides overlap. This is the effect known as "biasing" of the pen. Not used for fountain pens,
So-called office-grade steel nibs not only wear out but also open up after being used for two or three days. This is because there is no force that causes the left and right sides of the tip to overlap, that is, there is no "biasing". Fountain pens that can be used for decades need to have this kind of crookedness, and the vertical section of the pen inevitably curves gently to form the crookedness. If you press the entire top of the pen, this curve will disappear, and the pen's performance will be impaired. Furthermore, if the entire top surface of the pen is pressed, ink may flow out from the cutout onto the top surface of the pen. Therefore, by avoiding full contact with the pen and curving it, the elasticity against the pen can be adjusted, and a gap can be formed between the pen and the pen to prevent ink from flowing out. Furthermore, if the presser foot is curved, stress will not be concentrated, so it can withstand repeated loads, increasing the durability of the presser foot, and the force with which the pen is pressed will not change over time. Furthermore, by bringing only the tip of the curved presser foot into contact with the pen, the pen and the presser foot come into point or line contact, and when writing pressure is applied, the direction of the writing tip can be deflected from the contact point. Therefore, a flexible presser foot can be used to make the pen extremely hard.

The presser foot is guided by the guide hole and is slidably connected to the pen core cover. The presser foot used in the present invention has an annular end opposite to the tip thereof forming a circle or an arc, and is slidably inserted into the pen nib cover to connect with the pen nib cover or to guide the pen nib cover. It can be slidably fitted into the groove provided on the extension line of the guide hole of the presser foot and connected to the pen core cover, or the cylindrical body with a cut on the presser foot can be fitted with the cut and the moving knob. You can also insert it by letting it slide.

Inserting a cylindrical body onto the presser foot and inserting and connecting this cylindrical body to the pen nib cover prevents the pen nib cover from rotating as the rotary transfer tube rotates. It's for a reason. The cylindrical body has a pen core cover coupling part and a barrel coupling part, and is coupled to a fitting part provided on the pen core cover and barrel, respectively, and a cut is provided in which the moving knob can be slid freely. With this structure, when you grasp the pen side part of the barrel with one hand and rotate the rotary transfer tube with the other hand, the rotation transfer tube will not touch the pen core cover. Although rotational force is transmitted, since the pen core cover is connected to the barrel via the cylindrical body, rotation of the pen core cover can be more effectively prevented.

The pen core cover connection part of the cylindrical body can be formed by a hole or protrusion formed on the pen side end of the cylindrical body, and is fixed by fitting into the corresponding protrusion or hole of the pen core cover. be done. The protruding pen core cover coupling part can also be fixed using the groove-shaped guide hole of the guide part.

The shank joint of the cylindrical body can also be formed by a hole or protrusion formed on the end of the cylindrical body opposite to the pen side, and a corresponding protrusion or hole in the shank can be formed. Although it is fixed by fitting, it is also possible to use the opening of the cut in the cylindrical body. In addition, both coupling portions can be fixed in the form of grooves.

It is preferable that the presser foot has a straight part that is not curved in the length direction on the opposite side of the tip that comes into contact with the pen.This will improve the connection with the pen core cover. The advantage is that the advance and retreat of gold is extremely smooth. In addition, the tip of the presser foot that comes into contact with the pen should be in contact with at least the pen parts on both sides of the pen cutout to maintain a balance in the amount of deflection of the pen parts and to obtain good sliding with the paper surface. Optimal. Furthermore, if the tip of the presser foot that comes into contact with the pen is bifurcated or has a mountain-shaped cross section, the tip will not come into contact with the ink within the slit, thereby eliminating the possibility of ink being drawn out.

Furthermore, the end opposite to the tip of the presser foot has an upwardly projecting shape and is slidably fitted into the cut of the cylindrical body, which is supported by two points: the guide part of the pen core cover and the guide hole of the cylindrical body. This is optimal because it can prevent the presser foot from moving sideways more effectively.

The protrusion may be obtained by cutting, bending, or bulging a portion of the presser foot, or may be formed by fixing a small piece to the presser foot.

It is best if all or part of such a presser foot is formed to have an arcuate or mountain-shaped cross section in order to achieve the effect of holding down the pen. As for the material, in addition to metals such as stainless steel and phosphor bronze, plastic can also be used. Furthermore, the surface may be plated to improve ink resistance.

The moving knob provided on the presser foot fits into the feed groove of the rotary transfer tube, and the rotary transfer tube is rotatably connected to the pen core cover. If you rotate the rotary transfer cylinder,
The presser foot moves forward and backward through the guide hole, and the guide portion provided at the tip of the pen core cover also acts as a stopper for the rotating transfer tube. The writing quality of the pen is firm and thin when the presser foot presses a point close to the writing tip of the pen. The feed groove provided on the inner surface of the rotary transfer cylinder is preferably a spiral groove that facilitates minute feeding, but a cam groove may also be used.

In the present invention, the pen core cover may be directly connected to the barrel, or the pen core cover and the barrel may be connected using a connecting tube.

Hereinafter, the present invention will be explained with reference to the drawings.

In FIGS. 1 to 4, a pen 1 whose vertical cross section is gently curved includes elastic pen parts 3, 3 separated by a cut 2. 4 is a wear-resistant chip provided at the pen cutting tip.

The pen core 5 to which the pen 1 is attached has a capillary pen core groove 5a that extends in the vertical direction and communicates with the cutout 2, and a comb-shaped overflow ink storage chamber that accommodates overflowing ink in an amount exceeding that required for writing. 5b. 5c is an air groove.

The pen core cover 6 into which the pen core 5 is inserted has a guide portion 7 at the tip end on the pen side, and the guide portion 7 includes the pen 1
A tunnel-shaped guide hole 8 is provided on the upper surface axis of the presser foot 11, and a groove 28 is provided on an extension of the guide hole 8 to guide the presser foot 11.

The presser foot 11 has a tip 9 that contacts the pen 1 and a moving knob 10, and the tip 9 has a mountain-shaped cross section. In addition, the length direction of the presser foot 11 is curved in the direction of the pen, and there is a gap between the pen 1 and a portion other than the tip 9, and the tip 9 of the presser foot 11 is opposite to the tip 9 that contacts the pen 1. On the sides there is a straight section 14 that is not curved.

The cylindrical body 30 that is inserted onto the presser foot 11 and connected to the pen core cover 6 together with the presser foot 11 has a pen core cover coupling portion 31 in the form of a cut hole at the pen side end.
a, and has a notched hole-shaped shaft-tube coupling portion 31b at the end opposite to the pen side. The pen core cover coupling portion 31a is coupled to a protruding fitting portion 13a provided on the side surface of the tip of the pen core cover 6 (as shown in FIGS. 1 and 2), and the barrel coupling portion 31b is coupled to the inner periphery of the front barrel 22. It is coupled to a protruding coupling portion 13b provided on the surface (as shown in FIGS. 1 and 4). Cut 29 provided in the cylindrical body 30
A moving knob 10 is slidably fitted therein.

A feed groove 17 provided on the inner surface of a rotary transfer tube 16 is fitted into the moving knob 10, and the rotary transfer tube 16 is rotatably attached to the pen core cover 6 with its pen side end engaged with the guide portion 7. It is inserted.

Annular recesses 35 and 18 are provided at the abutting portions of the front shaft cylinder 22 and the rotary transfer cylinder 16, respectively.
A cylindrical ink leakage prevention packing 19 that contacts the inner surfaces of both the front shaft cylinder 6 and the front shaft cylinder 22 is fixed.

A rear shaft cylinder 23, which together with the front shaft cylinder 22 constitutes the shaft cylinder 20, is connected to the front shaft cylinder 22 via a connecting cylinder 21. 12 is a threaded part of the front shaft cylinder 22, 25 is a threaded part of the continuous joint cylinder 21, 26 is a ring,
27 is an ink cartridge.

Further, a cylindrical ink blocking packing 19a is disposed between the pen core cover 6 and the front barrel 22 and is in contact with both, and is fixed with a nut-like screw fastener 6a screwed onto the pen core cover 6. ing.

In this embodiment, since the tunnel-shaped guide hole 8 is provided, it is possible to prevent the presser foot 11 from moving laterally, and it is extremely effective against strong pressing. Also, presser foot 1
1 is made of a flexible material, has a tip 9 that comes into contact with the pen 1, is curved toward the pen, and has a gap between the portion other than the tip 9 and the pen 1.
This prevents the pen 1 from shifting and prevents ink from flowing from the cutout 2 to the top surface of the pen 1.
It can withstand repeated loads and has increased durability, and there is no change in the force pressing down on the pen 1 over time.
The pen 1 and the presser foot 11 are in point contact, and when writing pressure is applied, the writing tip can be deflected from the contact point, so the pen 1 can be made extremely hard. Furthermore, since there is a straight portion 14 that is not curved in the length direction on the opposite side of the tip of the presser foot 11 that contacts the pen 1, the connection with the pen core cover 6 is good, and the presser foot The forward and backward movement of Kin 11 is extremely smooth. Furthermore, since the ink leak prevention packing 19 is in contact with the inner surfaces of both the rotary transfer cylinder 16 and the front shaft cylinder 22, ink leakage from between the rotary transfer cylinder 16 and the front shaft cylinder 22 can be prevented. The rotation of the rotary transfer tube 16 is smooth due to the frictional resistance only between the inner surface of the front shaft tube 22 or the inner surface of the rotary transfer tube 16. Furthermore, since an ink blocking packing 19a is inserted,
Completely seals out intrusion ink. Furthermore, by finely adjusting the threading of the screw fastener 6a, the rotary transfer tube 16 can be freely tightened or released between the guide portion 7 of the pen core cover 6 and the front shaft tube 22. The rotation can be adjusted. Furthermore, since the pen core cover 6 is fixed to the front barrel 22 via the cylindrical body 30, the pen core cover 16 does not rotate as the rotary transfer barrel 16 rotates.

Next, modified examples of each coupling portion will be explained.

In FIGS. 5 to 7, a cylindrical body 30 provided with a cut 29 that is open only at one end is used, and the open part is used as a shaft-tube coupling part 31b. A protruding joint portion 13b provided on the inner circumferential surface of the front shaft cylinder 22 is connected to this shaft cylinder joint portion 31b. The other configurations are the same as those of the previous embodiment.

In FIGS. 8 to 10, a protruding pen core cover coupling part 31a protrudes from the pen side end of the cylindrical body 30, and this coupling part 31a is formed by a step formed in the groove-shaped guide hole 8 of the guide part 7. It is attached to the pen core cover 13a' and combined with the pen core cover 6. Further, an annular portion 15 is formed at the opposite end of the tip portion 9 of the presser foot 11, and is slidably inserted into the pen core cover 6. The other configurations are the same as those of the previous embodiment.

Next, an example in which an upward protruding part 15a is formed at the end opposite to the tip part 9 of the presser foot 11, and this protruding part 15a is slidably fitted into the cutout 29 of the cylindrical body 30 is shown in the eleventh example. This is shown in Figures 1 to 13. In this case, the protrusion 15a is formed by bending a protrusion protruding from the end of the presser foot 11.

Such a protruding portion 15a holds the small piece in place on the foot 11.
(as shown in FIGS. 14 and 15), or can be formed by bulging a portion of the presser foot 11 (as shown in FIGS. 16 and 17).

As described above, the present invention can strongly press the presser foot without deforming the pen itself, and avoids pressing the entire presser foot with the pen, twisting the presser foot, and force imbalance, and preventing the presser foot from pressing against the pen itself. Ink leakage is also prevented, and the pen core cover is also prevented from rotating as the rotary transfer cylinder rotates. As described above, this pen satisfies all the performances required of a fountain pen equipped with a device that can steplessly adjust the elasticity of the pen, and has a practical effect of being extremely easy to assemble and operate due to its simple structure.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view showing one embodiment of the fountain pen of the present invention, and FIGS. 2 to 4 are A of FIG. 1.
- An enlarged sectional view taken along line A, line B-B, and line C-C (the pen nib is omitted); FIG. 5 is a plan view showing another embodiment of the fountain pen with the rotary transfer tube removed; and FIG. The figure is a vertical cross-sectional view of the fountain pen shown in Figure 5 in a fully assembled state, Figure 7 is an enlarged cross-sectional view taken along line D-D in Figure 6 (pen nib omitted), and Figure 8 is with the rotating transfer tube removed. FIG. 9 is a vertical cross-sectional view of the fountain pen shown in FIG. 8 in a fully assembled state; FIG. 10 is an enlarged cross-sectional view taken along line E-E in FIG. 11 is a vertical sectional view showing another embodiment of the fountain pen, FIG. 12 is an enlarged sectional view taken along line F-F in FIG. 11 (pen nib is omitted), and FIG. 11
FIG. 14 is a longitudinal sectional view showing a modified example of the presser foot used in the present invention, FIG. 15 is a right side view thereof,
FIG. 16 is a longitudinal sectional view showing another modification of the presser foot;
FIG. 17 is a right side view thereof. 1... Pen, 5... Pen core, 6... Pen core cover, 7... Guide section, 8... Guide hole, 9... Tip part, 10... Moving knob, 11... Presser foot, 1
3a... Fitting portion, 14... Straight portion, 16... Rotating transfer tube, 17... Feed groove, 20... Shaft tube, 21
...Continuous joint tube, 28...Groove, 29...Cut, 30...
...Cylindrical body, 31a...Pen core cover joint part, 31
b...Shaft-tube joint.

Claims (1)

[Claims] 1. (A) A pen core cover 6 into which the pen core 5 with the pen 1 attached is inserted and has a fitting portion 13a with the cylindrical body 30; (B) A pen side of the pen core cover. Guide hole 8 located at the tip of the pen and positioned on the top axis of the pen
(C) a tip 9 that comes into contact with the pen and a moving knob 10;
a presser foot 11 guided by the guide hole; and (D) a connecting portion 31 that connects to a fitting portion of the pen core cover.
(E ) A rotary transfer cylinder 16 which is rotatably inserted into the pen nib cover by fitting the feeding groove 17 provided on the inner surface with the moving knob of the presser foot; A fountain pen consisting of a barrel-shaped joint part and a barrel 20 connected to each other. 2. The fountain pen according to claim 1, wherein the guide portion is a projection forming a groove-shaped guide hole. 3. The fountain pen according to claim 1, wherein the guide portion is a flange having a groove-shaped guide hole. 4. The fountain pen according to claim 1, wherein the guide portion is a projection forming a tunnel-shaped guide hole. 5. The fountain pen according to claim 1, wherein the guide portion is a flange having a tunnel-shaped guide hole. 6. The fountain pen according to claim 1, wherein the end opposite to the tip of the presser foot is ring-shaped and is slidably inserted into the pen nib cover and connected to the pen nib cover. 7. The fountain pen according to claim 1, wherein the presser foot is slidably fitted into a groove 28 provided on an extension line of the guide hole of the guide portion of the pen core cover and connected to the pen core cover. 8. The fountain pen according to claim 1, 6, or 7, wherein a straight portion 14 that is not curved is present on the opposite side of the tip of the presser foot that contacts the pen. 9. Claims 1, 6, 7, or 8, in which the opposite end of the presser foot has an upwardly projecting shape and is slidably fitted into the cut of the cylindrical body. fountain pen. 10. The fountain pen according to claim 1, wherein the pen core cover coupling portion of the cylindrical body is a cut hole formed at the end of the cylindrical body on the pen side. 11. The fountain pen according to claim 1, wherein the pen core cover coupling portion of the cylindrical body is a protrusion formed on the pen side end of the cylindrical body. 12. The fountain pen according to claim 1, wherein the shaft-tube coupling portion of the cylindrical body is a cut hole formed at the end of the cylindrical body opposite to the pen side. 13. The fountain pen according to claim 1, wherein the shaft-tube joint portion of the cylindrical body is an open cut portion. 14. The fountain pen according to claim 1, in which the pen core cover and barrel are connected using a continuous connecting tube 21. 15 Claim 1, wherein the feed groove of the rotary transfer cylinder is a spiral groove provided on the inner surface of the cylinder.
Fountain pen mentioned in the section.