JPH1076785A - Fountain pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fountain pen for sucking ink without fouling a neck section and controlling the scattering of ink when an impact is applied. SOLUTION: An ink reservoir section 4 is provided, and a through-hole 6 extending along the axial center and reaching the middle of a pen refill is formed on a central section of the end of the pen refill 3 protruding out of a neck section 1a of a pen holder and supporting a pen point, and then the through-hole is connected with an air relief channel 5 below the ink reservoir section of the pen refill to form a discharge line to the outside when the air in the ink reservoir section is relieved, and the discharge line is used as a suction inlet when ink is sucked from inside an ink bottle inlet by the ink reservoir section in the shaft. The ink can be sucked in by the operation of not immersing the neck section into ink but immersing only a suction hole opened at the tip of the pen refill at the time of suction of ink, and the suction operation can be carried out without fouling the neck section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fountain pen as a writing instrument, and more particularly to a fountain pen capable of sucking ink without soiling a neck.

[0002]

2. Description of the Related Art In general, a fountain pen conventionally used (a pen tip piece is made of one metal plate).
Then, it is common to immerse the neck of the fountain pen including the tip of the pen into the ink contained in the ink bottle and inhale. Such a conventional fountain pen has a pen tip piece, a pen core for supporting the pen tip piece, and a neck for supporting the pen core by press-fitting and fixing the pen, and the back (that is, the proximal end) of the neck is It is a pen shaft part, in which an ink storage part is provided. In addition, in the upper part of the pen core, that is, in the portion in contact with the pen tip piece, an ink groove which is provided extending from the pen tip to the ink storage part and serves as an ink passage. And an air escape groove which extends to reach the air passage. The ink groove and the air escape groove are formed so that the diameter of the air escape groove is somewhat larger than the diameter of the ink groove, and one or two air escape grooves are usually provided.

[0003]

However, in such a conventional fountain pen, the ink sucked by the ink suction operation of the fountain pen is stored in the ink from the pen tip through the ink groove or the air escape groove. Flows into the department. At this time, if the ink groove and the air escape groove have a sufficient cross-sectional area, the ink suction speed becomes slow, and it takes time to suck the ink, or the ink suction amount may not be sufficient. Further, if the cross-sectional areas of the ink groove and the air escape groove are simply increased, the amount of the ink flowing out becomes unstable during writing, so that the ink runs out or breathes (the ink flows out of the ink groove to reach the ink groove). Malfunctions). In addition, the pen tip may be slightly impacted downward, or ink may overflow from the ink storage unit due to decompression when removing the cap, causing a large amount of ink to move to the pen tip and scatter ink outside the pen tip. And so on.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to suck ink without soiling a neck portion, and to make ink out smoothly during writing. Another object of the present invention is to provide a fountain pen capable of suppressing ink scattering when an impact is applied when a cap is attached or detached or when the cap is dropped.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has an ink reservoir, which is provided at a central portion of a tip end of a pen core which protrudes from a neck of a pen shaft and supports a pen tip. A penetrating hole extending along the axis is provided to reach the middle of the pen core, and thereafter connected to the air escape groove below the ink reservoir of the pen core, and a discharge path to the outside when the air in the ink reservoir is released. In addition, the gist of the invention is to provide a suction port for manually sucking ink from the ink bottle from the ink tank inside the shaft.

[0006] According to this configuration, the ink can be sucked by immersing only the suction hole opened at the tip of the pen core into the ink without immersing the neck portion in the ink when the ink is sucked. In addition, the suction operation can be performed without soiling the neck.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a pen tip is supported by a pen core having an ink reservoir for temporarily storing ink in an ink reservoir in response to a change in internal / external pressure. In a fountain pen that press-fits and fixes the inside of the neck of the shaft and manually sucks ink by moving the piston etc. into the ink tank connected to the neck to create internal decompression,
A small hole is provided in the center of the front part of the pen core and connected to the air escape groove at the lower part of the pen core, and the other end has a plurality of air escape grooves at the rear part of the pen core that are open to the outside of the pen core and open to the ink storage unit. In addition, an intermediate barrier for separating the air escape groove from the air escape groove is provided at the rear portion of the pen core. When the ink is sucked, the neck portion does not sink into the ink and opens at the tip of the pen core. By immersing only the suction hole in the ink, the ink can be sucked and the suction operation can be performed without soiling the neck.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a structure of an ink suction portion which is a main part of a fountain pen to which the present invention is applied.
FIG. 2 is a sectional view taken along line AA of FIG. 1. FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is a cross-sectional view taken along line CC of FIG. 1. In these figures, reference numeral 1 denotes a fountain pen body, that is, a pen shaft portion, and a tip portion of the pen shaft portion 1 is a neck portion 1a, while a rear portion is an ink storage portion 1 as an ink tank.
b. Reference numeral 2 denotes a pen tip piece for writing on the paper surface or the like, and the fountain pen is a single pen tip type. A pen core 3 is press-fitted into the neck 1a to support the pen tip piece 2 and is provided with an ink groove and an air escape groove.
Are provided in the pen core 3 as comb grooves as a plurality of ink reservoirs for temporarily storing ink overflowing due to a pressure change on the pen tip portion, and 5 is formed in the lower portion of the pen core 3 by communicating with the comb groove 4. An air escape groove 6 which extends from the ink storage portion in the direction of the pen tip and serves as an air passage. A small hole 7 is formed at the upper portion of the pen core 3, that is, at a portion in contact with the pen tip portion 2, and is an ink groove which extends from the pen tip side to the ink storage portion and serves as an ink passage.

In this embodiment, two air escape grooves 5 are formed. The small hole 6 extends axially in the center of the tip end portion of the pen core 3 and is opened so as to penetrate the pen core 3. The extruded air moves from the base end to the tip end of the pen core 3 (from right to left in FIG. 1) and escapes through the small holes 6 to the outside.

The plurality of comb grooves 4 are arranged at predetermined intervals from a middle portion in the longitudinal direction of the pen core 3 to a base end thereof, and a plurality of round plate-like partitions 8 each having a flange structure are arranged at predetermined intervals. Is formed between. In addition, the partition 8 is a pen core 3
, Or may be integrally formed, or may be formed in a spiral structure. The air escape groove 5 and the ink groove 7 extend in the longitudinal direction of the pen core 3 so as to cut off a part of the partition wall 8. An intermediate barrier 9 is provided near the rear end of the pen core 3 where the comb groove is formed. The intermediate barrier 9 has substantially the same height dimension (diameter dimension) as the partition wall 8 over most of the periphery of the pen core 3 including the portion where the air escape groove 5 is formed. 3
In the upper end portion, i.e., the portion where the ink groove 7 is formed, a concave cutout portion 10 is provided, and the height (diameter size) is set somewhat lower than that of the partition 8.
The ink groove 7 is formed so as to extend continuously in the longitudinal direction of the pen core 3 by cutting off a part of the intermediate barrier 9 as in the case of the partition 8, while the air escape groove 5 is formed in the intermediate barrier 9. Is temporarily blocked (that is, isolated) in the front-rear direction, and two rear air escape grooves 1 are provided behind the intermediate barrier.
It is 5. For this reason, when the pen core 3 is mounted in the neck 1a of the fountain pen 1, the outer peripheral edge of the intermediate barrier 9 abuts on the inner wall of the neck 1a except for the cutout portion 10, and the ink storage unit 1b side and the pen tip side. Most of the space between them is blocked, and a small gap passage 11 is formed above the pen core 3.

Reference numeral 12 denotes a piston which is mounted in close contact with the inner wall of the ink storage unit 1b and slides in the ink storage unit 1b, and 13 denotes a piston rod which is connected to the piston 12 and causes the piston 12 to slide. It is.

In the fountain pen 1 having such a configuration, when writing is performed in a state where ink is sufficiently stored in the ink storage unit 1b, the ink in the ink storage unit 1b passes through the ink groove 7 and pen tip. It is fed by capillary action and can be written on paper. Ink is also supplied from the comb groove 4 to the pen tip through the ink groove 7. Air is sent from the outside to the ink storage unit 1b in response to the outflow of ink from the ink storage unit 1b.
Then, the ink is sent to the air escape groove 5, and is sent to the ink storage unit 1 b through the gap passage 11 and the rear air escape groove 15 or the ink groove 7 via the comb groove 4.

Next, in order to perform the ink suction operation, the piston 12 in the ink storage unit 1b is pushed forward by using the piston rod 13, and the small hole 6 formed at the tip of the pen core 3 is inserted into the ink fountain. Then, the piston rod 13 is pulled up. Thereby, the piston 12 is pulled up from the front part to the rear part of the ink storage part 1b, and performs the suction operation.
The ink sucked by this suction operation enters the pen core 3 through the small hole 6, then flows backward through the air escape groove 5 communicating with the small hole 6, and returns to a position corresponding to the last part of the air escape groove 5. That is, through the two comb grooves (4a, 4b) provided before the intermediate barrier 9, these comb grooves 4a, 4b
Through the gap passage 11 formed in the upper part, and circulates to the back side of the intermediate barrier 9. After circulating to the back side of the intermediate barrier 9, the two comb grooves (4c, 4c,
4d) through the comb grooves 4c and 4d and into the ink storage section 1b through the rear air escape groove 15 formed at the lower part. In other words, the suction ink flows around the intermediate barrier 9 and enters the ink storage unit 1b.

On the other hand, if an impact is applied with the pen pointed downward, or if the cap is rapidly attached or detached, a decompression effect occurs between the cap and the head 1a of the fountain pen 1, and an ink suction effect occurs. Then, the ink in the ink storage section 1b flows toward the pen tip. In this case, the ink
The ink is bypassed from the ink storage section 1b through the two rear air escape grooves 15 by the intermediate barrier 9 so that the ink does not flow directly to the air escape groove 5, and the ink reaches the pen tip.

At this time, the use of two detours each of the rear air escape groove 15 and the comb groove 4 is intended to increase the sectional area of the passage in order to facilitate the flow of the suction ink at the time of suction. . The width of the air groove is limited as a dimension for properly ejecting ink as a passage for air replacement, and a plurality of grooves are used to secure a cross-sectional area. 5 and 15 require a size that is 30 to 40% thicker than the width of the ink groove 7, but if one is used, the cross-sectional area is insufficient to facilitate the flow of ink at the time of suction. Further, since the width of the ink groove 4 is narrow, the ink does not flow from the ink storage section 1b at the time of impact or decompression, and it is not necessary to form a detour like the rear air escape groove 15 to prevent the ink from jumping out.

With the above-described configuration, it is possible to provide a writing instrument that is easy to inhale ink, has a stable ink discharge at the time of writing, and does not cause any trouble even when shock or sudden attachment and detachment of the cap is performed.

[0017]

As described above, according to the present invention,
A penhole extending along the axis is provided at the center of the tip of the pen core that has an ink reservoir and protrudes from the neck of the pen shaft and supports the pen tip, and reaches the middle of the pen core,
After that, it is connected to the air escape groove below the ink reservoir of the pen core to provide a discharge path to the outside when the air in the ink reservoir is released, and also manually sucks ink from the ink tank from the ink tank inside the shaft When the ink is sucked, the neck portion does not sink into the ink, and only the suction hole opened at the tip of the pen core is immersed in the ink, so that the ink can be sucked. The suction operation can be performed without soiling the neck.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an internal structure of a fountain pen according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the fountain pen according to the embodiment, taken along line AA in FIG.

FIG. 3 is a cross-sectional view taken along line BB in FIG. 1, partially showing an internal structure of the fountain pen according to the embodiment.

FIG. 4 is a cross-sectional view of the fountain pen according to the embodiment, taken along line CC in FIG.

[Explanation of symbols]

 10,000 fountain pens 1a neck 1b ink storage 2 pen tip 3 pen core 4 comb groove (ink reservoir) 5, 15 air escape groove 6 small hole 7 ink groove 8 partition 9 intermediate barrier 10 cutout 11 gap passage 12 piston 13 Piston rod

Claims (1)

[Claims] 1. A pen tip supported by a pen core having an ink reservoir for temporarily storing ink in an ink reservoir in response to a change in internal / external pressure, press-fitted and fixed inside a neck of a pen shaft, and ink connected to the neck. In a fountain pen that performs ink suction by manually moving a piston or the like in the tank to create internal decompression, a small hole is provided in the center of the front part of the pen core and connected to the air escape groove at the bottom of the pen core, A fountain pen provided with a plurality of air escape grooves at the rear end of the pen core, which are open to the outside of the pen core and open to the ink storage section, and an intermediate barrier separating the air escape groove and the air escape groove is provided at the rear of the pen core.