JPS6258318B2 - - 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 will either be a thin line if the pen used is hard and elastic, or a thick line will appear depending on the direction of the stroke. On the other hand, if soft elasticity is applied to the pen, 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 required a cut to guide 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, we conducted various studies and learned that the pen itself should not be modified with accessories or deformed, and that twisting and force imbalance should be avoided, and that the rotating ring and shaft should not be It has been discovered that even though ink leakage from between the cylinders is prevented, the ink sealing structure must not move the presser foot with unnecessary large force. The present invention was completed based on these findings.

That is, the present invention comprises: (A) a pen core cover into which a pen core with a pen attached is inserted; and (B) a pen core cover provided at the tip of the pen core cover on the pen side and positioned on the upper surface axis of the pen. (C) a presser foot having a tip that contacts the pen and a moving knob, guided by the guide hole, and slidably connected to the pen core cover; (D) (E) A rotary transfer cylinder which is rotatably inserted into the pen nib cover by fitting the feeding groove provided on the inner surface with the movement knob of the presser foot, (E) A shaft cylinder which is removably inserted into the pen nib cover, ( F) A fountain pen comprising a cylindrical ink leakage prevention packing installed in the gap between the rotating transfer tube and the pen core cover, in contact with the inner surfaces of both the rotation transfer tube and the barrel, but not in contact with the pen core cover; and (A) a pen nib cover into which a pen nib with a pen attached is inserted, and (B) a guide hole provided at the tip of the pen nib cover on the pen side and positioned on the top axis of the pen. (C) a presser foot having a tip that contacts the pen and a moving knob, guided by the guide hole, and slidably connected to the pen core cover; (D) a presser foot provided on the inner surface. A rotary transfer tube whose feed groove is fitted with the movement knob of the presser foot and is rotatably inserted into the pen nib cover, (E) a shaft tube which is detachably inserted into the pen nib cover, and (F) a rotary transfer tube. Installed in the gap between the tube and the pen core cover,
Contacting the inner surfaces of both the rotating transfer cylinder and the shaft cylinder,
This fountain pen consists of a cylindrical ink leakage prevention packing that does not contact the pen core cover, and (G) a cylindrical ink blocking packing that is provided in the gap between the pen core cover and the barrel and contacts both.

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. This guide hole forming method is preferable when the barrel and the pen core cover are integrally formed as will be described later.

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 pen 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 end forming a circle or an arc, and can be slidably inserted into the pen core cover and connected to the pen core cover, or can be connected to the guide of the pen core cover. It can be slidably fitted into the groove provided on the extension line of the guide hole and connected to the pen core cover, or the cylindrical body with a slit on the presser foot can be fitted with the slit and the moving knob. The presser foot and the cylindrical body may be slidably inserted and connected to the pen core cover. In this case, one end of the cylindrical body may be made to protrude and be attached to the groove-shaped guide hole to form a tunnel-shaped guide hole. It is preferable that the presser foot has a straight portion that is not curved in the length direction on the opposite side of the tip that contacts the pen.This will improve the connection with the pen core cover, and the presser foot This has the advantage that the movement forward and backward 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.

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 tube,
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 cylinder. 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.

Next, a novel ink leak prevention groove, which is one of the features of the present invention and which has not been previously known, will be explained.

A circumferential ink leakage prevention packing is installed in the gap between the rotating transfer tube and the pen core cover, contacts the inner surfaces of both the rotating transfer tube and the barrel, and does not contact the pen core cover, and is sealed. This is to prevent ink from leaking between the rotary transfer cylinder and the shaft cylinder. With this structure, ink leakage can be effectively prevented and the presser foot can be moved smoothly. That is, since it is unnecessary for the packing to come into contact with both the rotary transfer tube and the pen core cover, frictional resistance is reduced and rotation becomes smooth.

Furthermore, in the present invention, it is extremely effective to insert a cylindrical ink-blocking packing that is provided in the gap between the pen core cover and the barrel and comes into contact with both, since it can completely seal off intruding ink.

In the former case, the packing may be fixed by any appropriate means, but it is best to place and fix the packing in a recess provided in the rotary transfer tube, the pen core cover, the barrel, or the partner of the rotation transfer tube and the barrel. be.

The latter packing may be similarly fixed by any suitable means, but it may also be fixed by placing the packing in a recess provided in the pen core cover or barrel, or in a recess provided on the other side of the pen core cover and barrel. Although it can be fixed using a continuous joint tube, it is best to use a screw fastener to fix it. That is, by finely adjusting the threading of the screw fastener, the rotary transfer tube located between the guide portion of the pen core cover and the barrel can be freely tightened or released, and the rotation of the rotary transfer tube can be adjusted. It is.

In the present invention, the ring-shaped packing is included in the cylindrical packing, and is made of rubber such as NBR, silicone rubber, ABS resin, polyethylene, urethane resin, etc.
Plastics such as fluororesin can be used. Further, the former ink leakage prevention packing described above may function as a stopper when the presser foot is pulled back.

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

In FIGS. 1 to 3, a pen 1 having a gently curved longitudinal section 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.

In the one shown in FIG. 1, the pen core cover 6 into which the pen core 5 is inserted has a rear part that also serves as a front shaft tube 22, and a guide part 7 at the tip on the pen side. The guide portion 7 is formed of a protrusion and a nut 7a that is threadedly engaged with the outer periphery of the protrusion. A groove 28 is provided on the extension line of the groove 28 to guide the flexible 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.

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.

Front shaft tube 22 of pen core cover 6 and rotary transfer tube 1
6, each annular recess 3
5, 18 are provided, and these recesses 35, 18
A cylindrical ink leakage prevention packing 19 is fixed in contact with the inner surfaces of both the rotary transfer cylinder 16 and the front shaft cylinder 22.

A rear barrel 23, which together with the front barrel 22 constitutes the barrel 20, is connected to the front barrel 22 of the pen core cover 6 via a connecting barrel 21. 12 is a threaded portion of the front shaft cylinder 22, 25 is a threaded portion of the continuous joint cylinder 21,
26 is a ring, and 27 is an ink cartridge.

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.

As shown in FIGS. 4 and 5, the presser foot 11 used in this embodiment has an annular portion 15 at the opposite end of the tip 9.
It is also possible to provide a pen core cover 6 and slidably insert it into the pen core cover 6 and connect it to the pen core cover 6.

In FIGS. 6 and 7, the front barrel 22 is screwed and connected to the pen core cover 6. An annular recess is provided on each opposing surface of the pen core cover 6 and the front barrel 22, and the cylindrical ink blocking packing 19a contacts both the pen core cover 6 and the front barrel 22 through this recess. is fixed. The guide portion 7 is formed from a flange having a groove-shaped guide hole 8. The other configurations are the same as those of the previous embodiment.

In this embodiment, in addition to having the same effects as those of the previous embodiment, the ink blocking packing 19a is inserted, so that intrusion ink can be completely sealed off.

Ink blocking packing 19a used in this example
As shown in FIG. 8, the connecting tube 21 is screwed to the pen core cover 6, and the ink blocking packing 19 is inserted into the pen core cover 6 and placed in the recess of the front barrel 22.
a may be fixed.

Further, as shown in FIG. 9, the ink blocking packing 19a may be fixed with a screw fastener 6a such as a nut screwed into the pen core cover 6. In this way, by finely adjusting the threading of the screw stopper 6a, the guide part 7 of the pen core cover 6 and the front barrel 22 can be
The rotation of the rotary transfer tube 16 can be freely tightened or released, and the rotation of the rotary transfer tube 16 can be adjusted.

In each of the embodiments described above, the flange 7 having the groove-shaped guide hole 8 and the protrusion 7' having the groove-shaped guide hole 8' are combined, and the annular part 15 is provided opposite to the tip part 9 of the presser foot 11 to form a pen core. One that is slidably inserted into the cover 6 and connected to the pen nib cover 6 (No. 10)
) and a cylindrical body 30 with a cut 29 on the presser foot 11 which is slidably fitted into a groove 28 provided on the extension line of the tunnel-shaped guide hole 8 of the guide portion 7 of the pen core cover 6. The cylindrical body 30 is inserted into the pen core cover 6 by fitting the cutout 29 with the moving knob 10.
(Fig. 11), or by sliding the annular part 15 provided on the opposite side of the tip part 9 of the presser foot 11 onto the pen core cover 6 provided with the guide part 7 having the grooved guide 8. The cylindrical body 30 is movably inserted, and the cylindrical body 30 provided with the cut 29 is fitted onto the presser foot 11 by fitting the notch 29 and the moving knob 10.
0 inserted and connected to the pen core cover 6 (Fig. 12) can be used.

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 ink is prevented from leaking between the rotating transfer cylinder and the barrel, the presser foot can be moved smoothly, and ink enters the gap between the pen core cover and the barrel. Even if you try to do so, the ink can be completely sealed. 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 an embodiment of the fountain pen of the present invention, Fig. 2 is an enlarged sectional view taken along the line A-A in Fig. 1 (the pen nib is omitted), and Fig. 3 is the rotational transfer of Fig. 1. tube and
FIG. 4 is a plan view of the fountain pen with the nut forming the guide removed, FIG. 6 is a vertical sectional view showing another embodiment of the present invention, FIG. 7 is an enlarged sectional view taken along line B-B in FIG. 6 (pen nib is omitted), and FIGS. 8 and 9. FIGS. 10 to 12 are longitudinal sectional views showing other embodiments of the present invention, and FIGS. 10 to 12 are plan views showing modified examples of the connection state of the pen nib cover and presser foot. 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
4... Straight portion, 16... Rotating transfer cylinder, 17...
Feed groove, 19, 19a... Packing, 20...
Shaft tube, 21... Continuous joint tube, 28... Groove, 29... Cut, 30... Cylindrical body.

Claims (1)

[Scope of Claims] 1 (A) A pen core cover 6 into which a pen core 5 to which the pen 1 is attached is inserted, and (B) a pen core cover 6 provided at the tip of the pen core cover on the pen side and located on the upper surface axis of the pen. Guide hole 8 installed with
(C) a tip 9 that comes into contact with the pen and a moving knob 10;
(D) a presser foot 11 guided by the guide hole and slidably connected to the pen core cover; (E) A rotary transfer tube 16 rotatably inserted into the cover, and (E) a shaft tube 20 detachably inserted into the pen nib cover.
and (F) a cylindrical ink leakage prevention packing 19 that is installed in the gap between the rotating transfer tube and the pen core cover, contacts both the rotating transfer tube and the barrel, and does not contact the pen core cover. fountain pen. 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 guide portion is formed by a projection forming a groove-shaped guide hole and a nut threadedly engaged with the outer periphery of the projection. 7. 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. 8. 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. 9 Insert the cylindrical body 30 with the cut 29 provided on the presser foot by fitting the cut and the moving knob, and insert the presser foot and the cylindrical body into the pen core cover so that they can slide freely. A fountain pen according to claim 1, 7, or 8 of the appended claims. 10. The fountain pen according to claim 1, 7, 8, or 9, wherein an uncurved straight portion is present on the opposite side of the tip of the presser foot that contacts the pen. 11. The fountain pen according to claim 1, in which the pen core cover and barrel are connected using a continuous connecting tube 21. 12 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. 13 (A) Pen nib cover 6 into which pen nib 5 with pen 1 attached is inserted; (B) A guide hole provided at the tip of the pen nib cover on the pen side and positioned on the top axis of the pen. 8
(C) a tip 9 that comes into contact with the pen and a moving knob 10;
(D) a presser foot 11 guided by the guide hole and slidably connected to the pen core cover; (E) A rotary transfer tube 16 rotatably inserted into the cover, and (E) a shaft tube 20 detachably inserted into the pen nib cover.
(F) A cylindrical ink leakage prevention packing 19 provided in the gap between the rotating transfer tube and the pen core cover, in contact with both the rotating transfer tube and the barrel, but not in contact with the pen core cover; G) A fountain pen consisting of a cylindrical ink-blocking packing 19a that is provided in the gap between the pen core cover and the barrel and comes into contact with both. 14. The fountain pen according to claim 13, wherein the guide portion is a projection forming a groove-shaped guide hole. 15. The fountain pen according to claim 13, wherein the guide portion is a flange having a groove-shaped guide hole. 16. The fountain pen according to claim 13, wherein the guide portion is a projection forming a tunnel-shaped guide hole. 17. The fountain pen according to claim 13, wherein the guide portion is a flange having a tunnel-shaped guide hole. 18. The fountain pen according to claim 13, wherein the guide portion is formed by a projection forming a groove-shaped guide hole and a nut threadedly engaged with the outer periphery of the projection. 19. The fountain pen according to claim 13, 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. 20 Claim 13, in which 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.
Fountain pen mentioned in the section. 21 Cylindrical body 30 with a cut 29 on the presser foot
Claims 13 and 19, in which the presser foot and the cylindrical body are slidably inserted and connected to the pen core cover by fitting the cutting and moving knobs together.
or the fountain pen described in paragraph 20. 22 Claims 13, 19, 20, or 21, in which a straight portion that is not curved is present on the opposite side of the tip of the presser foot that contacts the pen.
Fountain pen mentioned in the section. 23. The fountain pen according to claim 13, in which the pen core cover and the barrel are connected using a connecting tube 21. 24 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 described in item 3. 25. The fountain pen according to claim 13, wherein the cylindrical ink-blocking packing is fixed using a barrel. 26. The fountain pen according to claim 13, wherein the cylindrical ink-blocking packing is fixed using a continuous joint tube. 27. The fountain pen according to claim 13, wherein the cylindrical ink blocking packing is fixed using a screw fastener 6a.