Perpetual Pen

Abstract

To provide a fountain pen which has an excellent writing performance and can provide visual pleasure.SOLUTION: A fountain pen 2 includes: a pen tip 4 having a slit 6 extending rearward from a pen point P at a front end; a pen core 10 having an ink groove 12 formed at a position corresponding to the slit 6; a hollow pen tip pressing member 30 which is fitted in the pen tip 4 and the pen core 10 which are overlapped in a state that a predetermined range from the pen point P of the pen tip 4 protrudes forward farther than the pen core 10; and a cylindrical barrel 20 having a neck part 22 located rearward of the pen tip pressing member 30. The pen tip 4, the pen core 10, and the pen tip pressing member 30, which are fixed to each other, are fixed to the neck part 22. The slit 6 is formed continuously from the pen point P to at least a position reaching the neck part 22. An area, which covers at least the slit 6, of the pen tip pressing member 30 has translucency.SELECTED DRAWING: Figure 5A

Description

[Technical field]

[0001] The present invention relates to a fountain pen in which ink flows through ink grooves by capillary action. [Background technology]

[0002] Some writing instruments have barrels made of transparent materials so that the ink inside can be seen from the outside. Among such writing instruments, barrels made of syndiotactic polypropylene have been proposed (see, for example, Patent Document 1). Since syndiotactic polypropylene has high transparency, the ink inside can be seen more clearly, enhancing the design effect. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-193868 Summary of the Invention [Problem to be solved by the invention]

[0004] When the writing instrument described in Patent Document 1 is a ballpoint pen, the ink flowing up to near the front end of the writing instrument can be seen. However, when the writing instrument is a fountain pen, a certain area from the front end is covered with a metal nib. Therefore, even if the transparency of the barrel is increased, the ink flowing in the nib area cannot be seen, and the user cannot enjoy the visual pleasure. If a continuous gap is provided in the nib to make the ink flowing in the nib area visible, there is a risk that the nib on both sides of the gap will bend significantly, making writing difficult.

[0005] SUMMARY OF THE PRESENT EMBODIMENTS Accordingly, an object of the present invention is to solve the above problems and to provide a fountain pen which has excellent writing performance and also provides visual enjoyment. [Means for solving the problem]

[0006] A fountain pen according to one embodiment of the present invention comprises: a pen tip having a slit extending rearward from a pen point at a front end; a pen core having an ink groove formed at a position corresponding to the slit; a hollow pen tip pressing member that fits with the pen tip and the pen core, the pen tip and the pen core being overlapped with each other in a state where a predetermined range from the pen point of the pen tip protrudes forward beyond the pen core; a cylindrical barrel having a neck portion located behind the pen tip pressing member; Equipped with The pen tip, the pen core, and the pen tip pressing member, which are fixed to each other, are fixed to the neck portion, The slit is formed continuously from the pen point to at least a position reaching the neck portion, A fountain pen characterized in that at least the area of ​​the pen tip holder which covers the slit is translucent. Effect of the Invention

[0007] According to the present invention, it is possible to provide a fountain pen that has excellent writing performance and also provides visual enjoyment. [Brief description of the drawings]

[0008] [Figure 1] 1 is a plan view showing the pen tip of a fountain pen according to a first embodiment of the present invention. [Diagram 2] 1 is a side view showing a pen core of a fountain pen according to a first embodiment of the present invention. [Figure 3A] 3 is a plan view of the pen tip shown in FIG. 1 and the pen core shown in FIG. 2 overlapped on each other, as viewed from the rear side. [Figure 3B] FIG. 3B is a side view of the pen tip and pen core shown in FIG. 3A. [Figure 3C] FIG. 3C is a cross-sectional view showing section AA of FIG. 3B. [Figure 4A]1 is a side view showing a pen tip holder of a fountain pen according to a first embodiment of the present invention. [Figure 4B] 4B is a perspective view of the pen tip pressing member shown in FIG. 4A. [Figure 5A] 1 is a plan view showing the front area of ​​a fountain pen according to a first embodiment of the present invention, as viewed from the rear side. [Figure 5B] FIG. 5B is a side view of the front region of the fountain pen shown in FIG. 5A. [Figure 5C] 5B is a plan view of the front region of the fountain pen shown in FIG. 5A as viewed from the abdominal side. [Figure 6] 10 is a plan view showing a schematic view of the front area of ​​a fountain pen according to a second embodiment of the present invention. FIG. [Figure 7A] 11 is an oblique view showing an integrally constructed nib holder and neck of a fountain pen according to a third embodiment of the present invention. FIG. [Figure 7B] 11 is a plan view showing a schematic view of the front area of ​​a fountain pen according to a third embodiment of the present invention. FIG. [Figure 8] 5C is a cross-sectional view showing a cross section EE of FIG. 5B, illustrating a state in which a pen tip pressing member having a convex portion on its inner surface is fitted with the pen tip and the pen core. FIG. [Figure 9] 5C is a cross-sectional view showing a cross section EE of FIG. 5B, illustrating a state in which a pen tip pressing member having a sealing protrusion on its inner surface is fitted with a pen tip and a pen core. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. The fountain pen described below is for embodying the technical idea of ​​the present invention, and the present invention is not limited to the following unless otherwise specified. In each drawing, the same reference numerals may be used for components having the same function. In consideration of the explanation or ease of understanding of the main points, the embodiments and examples may be shown separately for convenience, but partial replacement or combination of the configurations shown in different embodiments and examples is possible. The size and positional relationship of the components shown in each drawing may be exaggerated to clarify the explanation. In this specification, "front" refers to the tip side of the fountain pen, and "rear" refers to the opposite side. The side of the pen core that is covered by the nib is called the back, and the opposite side where the comb grooves are exposed and not covered by the nib is called the abdomen. In the drawings, the back is drawn at the top and the abdomen is drawn at the bottom.

[0010] (Fountain pen according to the first embodiment of the present invention) First, a fountain pen according to a first embodiment of the present invention will be described with reference to Figs. 1 to 5C. Fig. 1 is a plan view showing a nib of the fountain pen according to the first embodiment of the present invention. Fig. 2 is a side view showing a pen core of the fountain pen according to the first embodiment of the present invention. Fig. 3A is a plan view showing the nib shown in Fig. 1 and the pen core shown in Fig. 2 superimposed on each other, as viewed from the rear side. Fig. 3B is a side view of the nib and pen core shown in Fig. 3A. Fig. 3C is a cross-sectional view showing the cross section AA of Fig. 3B. Fig. 4A is a side view showing a nib pressing member of the fountain pen according to the first embodiment of the present invention. Fig. 4B is a perspective view of the nib pressing member shown in Fig. 4A. Fig. 5A is a plan view showing the front region of the fountain pen according to the first embodiment of the present invention as viewed from the rear side. Fig. 5B is a side view of the front region of the fountain pen shown in Fig. 5A. Fig. 5C is a plan view showing the front region of the fountain pen shown in Fig. 5A as viewed from the abdomen side.

[0011] The fountain pen 2 according to this embodiment comprises a nib 4, a pen core 10, a hollow nib holder 30 that fits with the overlapping nib 4 and pen core 10, and a cylindrical barrel 20. When the nib holder 30 fits with the nib 4 and pen core 10, an assembly is formed in which the three members are fixed together, and this assembly is attached to a neck 22, which is a component on the front side of the barrel 20.

[0012] <Pen tip> The pen tip 4 according to this embodiment is composed of a pen tip body 4A and a pen tip body 4B, which are separate members. The vicinity of the pen point P provided at the front end of the pen tip bodies 4A and 4B becomes the writing area. For example, after the pen point P is welded to the front end of the integral pen tip member, the pen tip member can be cut and separated to form the separate pen tip body 4A and pen tip body 4B. The pen tip 4 is formed of a gold alloy or special steel because it requires elasticity and corrosion resistance, and a wear-resistant alloy is used for the pen point P portion that contacts the paper.

[0013] The pen tip bodies 4A, 4B formed in this manner are arranged at a predetermined interval, and are overlapped with the pen core 10 with the areas of the pen tip bodies 4A, 4B near the pen point P protruding forward beyond the pen core 10. A hollow pen tip holder 30 is fitted so as to cover the outer surfaces of the overlapped pen tip 4 and pen core 10, thereby forming an assembly of the pen tip 4, pen core 10, and pen tip holder 30 fixed to each other. At this time, a slit 6 is formed between the pen tip bodies 4A and 4B.

[0014] The slit 6 has a front region 6A that is narrower in width within a predetermined range from the pen point P, and a rear region 6B that is wider and located behind that. By arranging and fixing the pen tip bodies 4A and 4B at a predetermined distance in the front-to-rear direction, it is possible to form the slit 6 having the front region 6A of approximately the same width in the front-to-rear direction. In the narrow front region 6A, ink flows toward the pen point P due to capillary action. In this embodiment, the pen tip 4 has a narrow front region 6A and a wide rear region 6B, but is not limited to this. For example, the narrow front region 6A may extend continuously from the front end to the rear end of the pen tip 4.

[0015] In this embodiment, as shown in Figures 2, 3A, and 3C, two parallel protrusions 10A extend forward and backward in the area of ​​the pen core 10 that overlaps with the pen tip 4. The pen tip bodies 4A and 4B are arranged to contact the outer side surfaces of the two protrusions 10A. Therefore, by being guided by the two protrusions 10A, the slit 6 can be reliably formed between the pen tip bodies 4A and 4B.

[0016] Furthermore, as shown by arrow B in Fig. 3C, the pen tip bodies 4A, 4B have their end portions on the abdominal side bent, and a step portion is formed at the corresponding position of the pen core 10. This allows the pen tip bodies 4A, 4B to engage with the pen core 10 on the abdominal side. The pen tip bodies 4A, 4B are reliably fixed to the pen core 10 by the back side that contacts the protrusion 10A and the abdominal side that engages with the step portion. This allows the pen tip 4 and the pen core 10 to be fixed with the slit 6 of a predetermined width reliably formed.

[0017] <Pen core> As described above, the pen core 10 has two protrusions 10A formed on the back of the front end side covered by the pen tip 4 composed of the pen tip bodies 4A and 4B. Between the two protrusions 10A on the back of the pen core 10, an ink groove 12 is formed extending from the front end to the rear region. Due to capillary action, ink flows from the rear side to the front side in the ink groove 12. This allows the ink in the ink storage region located behind the neck portion 22 of the barrel 20 to flow to the writing region at the front end of the pen tip 4. The ink groove 12 is formed at a position corresponding to the slit 6 extending back and forth provided in the pen tip 4. When the ink that has flowed in the ink groove 12 reaches the front region 6A of the slit 6, it also flows into the front region 6A of the slit 6 due to capillary action and flows out from the pen point P at the front end onto the paper surface that it contacts.

[0018] In this embodiment, the ink groove 12 extends in the front-rear direction on the back of the pen core 10, but as shown in Figs. 5A to 5C, in the rear region of the pen core 10, it extends in the circumferential direction so as to connect between the back side and the ventral side (see arrow C). Furthermore, the ink groove 12 extends further rearward on the ventral side of the pen core 10 from the region extending in the circumferential direction (see arrow D). When the pen core 10 is attached to the barrel 20, the ink groove 12 extending further rearward on the ventral side of the pen core 10 communicates with the ink storage region. However, the extension direction of the ink groove 12 is not limited to this, and for example, the ink groove 12 may extend in the front-rear direction on the back side of the pen core 10 and communicate with the ink storage region at the rear end.

[0019] On the abdominal side of the pen core 10, multiple comb members 16A are arranged in a front-to-rear arrangement with a gap between them, and comb grooves 16 are formed in the spaces between adjacent comb members 16A to temporarily reserve ink. In this embodiment, the comb grooves 16 are formed in the front-to-rear direction from a position overlapping with the rear end region of the pen tip 4 to just before the region in which the ink grooves 12 extending in the circumferential direction are formed. Also, in the circumferential direction, the comb grooves 16 are formed over approximately half the circumference on the abdominal side. However, this is not limited to this, and for example, the comb grooves 16 may be formed in the circumferential direction up to the vicinity of the ink grooves 12 provided in the back portion.

[0020] Furthermore, an air groove 14 extending front to back is formed in the central region of the back in the circumferential direction. The air groove 14 has the function of taking in external air and supplying it to the ink containing region when ink in the ink containing region flows inside the ink groove 12 and flows out from the pen point P of the pen tip 4 to the outside, thereby preventing the inside from becoming negative pressure. The pen core 10 can be made of a resin material. This makes it possible to integrally mold the pen core 10 having the protrusions 10A, ink grooves 12, air grooves 14, and comb grooves 16.

[0021] <Pen tip holder> 4A and 4B, the pen tip holder 30 has a hollow structure and fits with the overlapping pen tip 4 and pen core 10 in a state where the area near the pen point P of the pen tip 4 protrudes forward beyond the pen core 10. The pen tip holder 30 can be formed of an elastic resin material. It is preferable to determine the dimensions of the inner surface of the pen tip holder 30 so that it fits with the pen tip 4 and pen core 10 in a state of slight interference fit. This makes it possible to form an assembly in which the pen tip 4, pen core 10, and pen tip holder 30 are firmly fixed to one another.

[0022] In this embodiment, the pen core 10 extends rearward beyond the pen tip holding member 30, and the area of ​​the pen core 10 extending rearward beyond the pen tip holding member 30 fits into the neck portion 22 of the cylindrical barrel 20. In other words, the neck portion 22 of the barrel 20 fits into the pen core 10 located rearward of the fitting area with the pen tip holding member 30. This allows the assembly of the pen tip 4, pen core 10, and pen tip holding member 30 to be securely attached to the neck portion 22 of the barrel 20.

[0023] The rear end of the pen tip 4 is located at a position where it contacts the front end of the neck portion 22 of the barrel 20, or a position slightly forward of that. However, this is not limited to this, and the pen tip 4 can also be formed to fit into the neck portion 22, like the pen core 10. The rear end of the pen tip pressing member 30 is located at a position where it contacts the front end of the neck portion 22 of the barrel 20, or a position slightly forward of that.

[0024] This structure makes it possible to realize the slit 6 that is continuously formed from the pen point P to at least a position that reaches the neck portion 22. The ink groove 12 that extends from the rear region of the pen core 10 to the front end is disposed at a position corresponding to the slit 6. In other words, the upper side of the ink groove 12 is not covered by the pen tip 4.

[0025] As shown in FIGS. 5A to 5C, substantially the entire outer surface of the pen tip 4 protruding forward from the neck portion 22 is covered with a pen tip pressing member 30, except for the area in front of the pen core 10. 4B (also shown in Figs. 7 and 8 described below), a positioning protrusion 36 is provided on the inner surface of the pen tip holder 30 at a position corresponding in the circumferential direction to the air groove 14 provided in the pen core 10. By arranging this positioning protrusion 36 in the air groove 14, it is possible to position the pen tip holder 30 in the circumferential direction relative to the pen core 10. Even when the positioning protrusion 36 is arranged in the air groove 14, a sufficient space is secured for air to flow within the air groove 14.

[0026] <Shaft tube> The barrel 20 can be composed of a neck 22 located at the front, a barrel located in the center, and a tail plug located at the rear. The neck 22 and barrel are detachably attached to each other by screwing or the like. An ink storage area that stores ink is disposed inside the barrel 20, mainly in the barrel area. An ink cartridge may be used as the ink storage area, or a storage section that stores bottled ink sucked by a converter may be used. The barrel 20 can be formed, for example, from a resin material.

[0027] (Ink visualization) In this embodiment, the pen tip holding member 30 is formed to be translucent in its entirety. "Translucent" may mean transparent, or may be slightly colored to match the color of the ink or the like. In the pen tip holding member 30, the area covering the slit 6 may be transparent, and the other areas may be slightly colored. Examples of the resin material forming the pen tip holding member 30 include polycarbonate and acrylic. From the viewpoint of increasing the transparency of the pen tip holding member 30, it is preferable to use acrylic.

[0028] As described above, the slit 6 is formed continuously from the pen point P to a position at least reaching the neck portion 22 of the barrel 20, so that the ink flowing in the ink groove 12 can be seen from the outside through the translucent pen tip holder 30. This provides visual enjoyment to the user.

[0029] The slit 6 is continuously formed from the pen point P to at least a position that reaches the neck portion 22, and the pen tip 4 (4A, 4B) on both sides of the slit 6 is held by the pen tip holding member 30 that is fitted with the pen tip 4 and the pen core 10, thereby preventing a step from occurring at the pen point P and enabling writing with a constant character width without any snagging. From the viewpoint of preventing a step from occurring at the pen point P, it is preferable that the pen tip holding member 30 has high rigidity, but from the viewpoint of obtaining a smooth writing feel, it is preferable that the pen tip holding member 30 has some elasticity. Therefore, it is preferable that the pen tip holding member 30 is formed to have optimal rigidity and elasticity according to the application and the user's preference.

[0030] In this embodiment, the pen tip 4 is composed of two separate members 4A and 4B, which are arranged at a predetermined interval to form the slit 6. This provides the slit 6 that extends continuously from the front end to the rear end of the pen tip 4 (4A, 4B), and is held with sufficient strength by the pen tip pressing member 30, preventing a step from occurring at the pen point P.

[0031] In particular, since the entire outer surface area of ​​the pen tip 4 protruding forward from the neck portion 22, except for the area forward of the pen core 10, is covered by the pen tip holding member 30, the pen tip 4 (4A, 4B) is adequately supported by the pen tip holding member 30, and the occurrence of a step at the pen point P can be effectively suppressed.

[0032] In addition to the entire pen tip holder 30 being translucent, the entire pen core 10 can also be formed to be translucent. In this case, since the entire pen tip holder 30 and the entire pen core 10 are translucent, the ink flowing through the pen core, including inside the ink grooves 12, can be seen from all directions, providing effective visual enjoyment.

[0033] In the above, the entire pen tip holder 30 is translucent, but this is not limited thereto. For example, only the area of ​​the pen tip holder 30 covering the slit 6 may be translucent. Even in this case, the ink flowing in the ink groove 12 can be visually confirmed from the outside. The pen tip holder 30 having a portion that is translucent can be formed by forming a non-translucent area on the translucent pen tip holder 30 by coating, or can be molded in two colors using a translucent material and a non-translucent material.

[0034] (Fountain pen according to the second embodiment of the present invention) Next, a fountain pen according to a second embodiment of the present invention will be described with reference to Fig. 6. Fig. 6 is a plan view showing a front area of ​​a fountain pen according to a second embodiment of the present invention. In the first embodiment, the pen tip 4 is composed of a pen tip body 4A and a pen tip body 4B, which are separate members, but this embodiment is different in that the pen tip 4' is integrally formed.

[0035] Specifically, the pen tip 4' is composed of a first region 4a and a second region 4b that are spaced apart from each other, and a connecting region 4c that connects the first region 4a and the second region 4b at the rear end side. In the pen tip 4', the slit 6 also has a front region 6A whose width is narrowed in a predetermined range from the pen point P, and a rear region 6B whose width is wider and located rearward of the front region 6A. Note that the front region 6A whose width is narrowed may extend continuously from the front end of the pen tip 4' to a position where it reaches the connecting region 4c.

[0036] In the first embodiment described above, the slit 6 is defined only when the pen tip holder 30 fits with the pen tip 4' and the pen core 10, but in this embodiment, the slit 6 can be defined by the pen tip 4' alone. With the area of ​​the pen tip 4' near the pen point P protruding forward beyond the pen core 10, the pen tip 4' and the pen core 10 are overlapped, and the overlapped pen tip 4' and pen core 10 are fitted into the pen tip holding member 30 to form an assembly of the pen tip 4', pen core 10 and pen tip holding member 30 which are fixed together.

[0037] In this embodiment, the pen tip 4' (mainly the connecting region 4c) and the pen core 10 extend rearward from the pen tip holding member 30, and the region of the pen tip 4' and the pen core 10 extending rearward from the pen tip holding member 30 is adapted to fit with the neck portion 22 of the cylindrical barrel 20. In other words, the neck portion 22 of the barrel 20 fits with the pen tip 4' and the pen core 10 located rearward from the fitting region with the pen tip holding member 30. This allows the assembly of the pen tip 4', the pen core 10 and the pen tip holding member 30 to be securely attached to the neck portion 22 of the barrel 20.

[0038] This results in a fountain pen 2 in which the slit 6 is continuously formed at least from the pen point P to a position where it reaches the neck portion 22. In this embodiment, the nib 4' itself defines the slit 6, but since the slit 6 extends continuously from the front end of the pen tip 4' to the rear side, there is a risk that a step will occur at the pen point P if the pen tip 4' and the pen core 10 are simply overlapped. However, the pen tip 4' on both sides of the slit 6 is held by the pen tip pressing member 30 that is engaged with the pen tip 4' and the pen core 10, so the occurrence of a step at the pen point P can be reliably prevented.

[0039] Considering the above first and second embodiments, the neck portion 22 of the barrel 20 can be described as engaging with a member including at least the pen core 10, which is located rearward of the engaging area with the pen tip holding member 30.

[0040] Therefore, the fountain pen 2 in the above embodiment comprises a pen tip 4 (4') having a slit 6 extending rearward from the pen point P at the front end, a pen core 10 having an ink groove 12 formed at a position corresponding to the slit 6, a hollow pen tip holding member 30 that fits with the pen tip 4 (4') and the pen core 10 superimposed with a predetermined range from the pen point P of the pen tip 4 protruding forward beyond the pen core, and a cylindrical barrel 20 having a neck 22 that fits with a member including at least the pen core 10 located rearward of the fitting area with the pen tip holding member 30, and the slit 6 is formed continuously from the pen point P to a position reaching at least the neck 22, and at least the area of ​​the pen tip holding member 30 covering the slit 6 is translucent.

[0041] The slit 6 and ink groove 12 extend continuously over the entire area from the neck 22 to the front end, and the area of ​​the pen tip holder 30 covering the slit 6 is translucent, so that the ink flowing in the ink groove 12 from the neck 22 to the front end can be seen from the outside. At this time, the pen tip 4 (4') on both sides of the slit 6 is held by the pen tip holder 30 engaged with the pen tip 4 (4') and the pen core 10, preventing a step from occurring at the pen point P and enabling writing with a constant character width without any snagging. This makes it possible to provide a fountain pen 2 that has excellent writing performance and is visually enjoyable.

[0042] Although it has been described above that the slit 6 is continuously formed from the pen point P to at least a position that reaches the neck 22, it can also be expressed as follows: In the area of ​​the pen core 10 in front of the neck 22 that is covered by the pen tip 4 (4') and the pen tip presser 30, a gap is provided in the pen tip 4 (4') so that the pen tip 4 (4') is not present above the ink groove 12, that is, between the ink groove 12 and the pen tip presser 30, and this gap is provided continuously in a position corresponding to the entire area of ​​the ink groove 12 in front of the neck 22.

[0043] (Fountain pen according to the third embodiment of the present invention) Next, a fountain pen according to a third embodiment of the present invention will be described with reference to Figures 7A and 7B. Figure 7A is a perspective view showing the integrally configured nib holder and neck of a fountain pen according to a third embodiment of the present invention. Figure 7B is a plan view showing a schematic front area of ​​a fountain pen according to a third embodiment of the present invention. In the above first and second embodiments, the nib holder 30 and the barrel 20 having the neck 22 are separate members, but this embodiment is different in that the nib holder 30 and the neck 22 of the barrel 20 are integrally configured.

[0044] As shown in Fig. 7B, the pen tip holding member 30, which is integral with the neck portion 22, fits into the pen tip 4 and pen core 10, which are stacked on top of each other. As a result, the pen tip 4, pen core 10, and pen tip holding member 30, which are fixed to each other, are fixed to the neck portion 22. The pen tip holding member 30 and the neck portion 22 of the barrel 20 are integrally formed by integrally molding the pen tip holding member 30 and the neck portion 22, or by joining the pen tip holding member 30 and the neck portion 22, which are manufactured separately, with an adhesive or the like.

[0045] In Fig. 7B, the pen tip 4 according to the first embodiment shown in Fig. 1 is used, but a pen tip 4' according to the second embodiment shown in Fig. 6 may also be used. When the pen tip holding member 30 is configured integrally with the neck portion 22, it is not necessary to extend the pen tip 4 and the pen core 10 rearward beyond the pen tip holding member 30. On the other hand, in the case of the pen tip 4' according to the second embodiment, the slit 6 is continuously formed up to a position that reaches the neck portion 22, so that the connecting region 4c is located rearward beyond the pen tip holding member 30.

[0046] Considering the third embodiment in addition to the above first and second embodiments, the fountain pen 2 according to the above embodiments can be expressed as follows. The fountain pen 2 comprises a pen tip 4 (4') having a slit 6 extending rearward from the pen point P at the front end, a pen core 10 having an ink groove 12 formed at a position corresponding to the slit 4 (4'), a hollow pen tip holding member 30 that fits into the pen tip 4 (4') and pen core 10 which are superimposed with a predetermined range from the pen point P of the pen tip 4 (4') protruding forward of the pen core 10, and a cylindrical barrel 20 having a neck 22 located behind the pen tip holding member 30, the pen tip 4 (4'), the pen core 10 and the pen tip holding member 30 being fixed to each other are fixed to the neck 22, the slit 6 is formed continuously from the pen point P to a position reaching at least the neck 22, and at least the area of ​​the pen tip holding member 30 covering the slit 6 is translucent.

[0047] In this case, in the first and second embodiments, the pen tip holding member 30 and the barrel 20 having the neck 22 are separate components, and the neck 22 is fitted with a component including at least the pen core 10 located rearward of the fitting area with the pen tip holding member 30, so that the pen tip 4 (4'), pen core 10 and pen tip holding member 30, which are fixed to each other, are fixed to the neck 22. On the other hand, in the third embodiment, the pen tip holding member 30 and the neck portion 22 are integrally constructed, so that the pen tip 4 (4'), the pen core 10 and the pen tip holding member 30, which are fixed to each other, are fixed to the neck portion 22.

[0048] In either case, it is possible to provide a fountain pen 2 that has excellent writing performance and also provides visual enjoyment.

[0049] (Ink adhesion prevention mechanism) As described above, in order to make the ink flowing in the ink groove 12 clearly visible through the light-transmitting pen tip holder member 30, it is necessary to prevent the ink flowing in the ink groove 12 from adhering to the pen tip holder member 30. Next, a mechanism for preventing the ink flowing in the ink groove 12 from adhering to the pen tip holder member 30 will be described with reference to Figures 7 and 8.

[0050] <Convex portion formed on the inner surface of the pen tip holder> First, a mechanism using a convex portion formed on the inner surface of a pen tip holder will be described with reference to Fig. 8. Fig. 8 shows cross section EE of Fig. 5B, which illustrates a state in which a pen tip holder having a convex portion on its inner surface fits with the pen tip and pen core.

[0051] In the mechanism according to this embodiment, convex portions 32 are provided on the inner surface of the pen tip holding member 30, extending back and forth along the slit 6, a predetermined distance L1 away from both ends of the slit 6. The convex portions 32 are adapted to come into contact with the outer surface of the pen tip 4. As a result, the pen tip holding member 30 is fitted with the pen tip 4 and the pen core 10, with the inner surface of the pen tip holding member 30 and the outer surfaces of the pen tip 4 on both sides of the slit 6 spaced apart by the predetermined distance L2.

[0052] The protrusions 32 extending on both sides of the slit 6 separate the inner surface of the pen tip holder 30 and the outer surfaces of the pen tip 4 on both sides of the slit 6 by a predetermined distance L2, thereby preventing the ink flowing in the ink groove 12 from flowing onto the inner surface of the pen tip holder 30 due to capillary action. The protrusions 32 are separated from both ends of the slit 6 by a predetermined distance L1, thereby preventing the ink flowing in the ink groove 12 from flowing along the protrusions 32 onto the inner surface of the pen tip holder 30. Here, the predetermined distances L1 and L2 are preferably 0.2 mm or more, and more preferably 0.5 mm or more, from the viewpoint of preventing capillary action.

[0053] This makes it possible to prevent the ink flowing in the ink groove 12 from flowing onto the inner surface of the pen tip pressing member 30, thereby providing a fountain pen 2 with excellent appearance in which the ink flowing in the ink groove 12 can be clearly seen from the outside.

[0054] <Sealing protrusion formed on the inner surface of the pen tip holder> Instead of using the above-mentioned convex portion 32, a sealing mechanism using a sealing convex portion can also be adopted. Next, with reference to Fig. 9, a mechanism using a sealing convex portion formed on the inner surface of the pen tip holding member will be described. Fig. 9 shows the cross section EE of Fig. 5B, and is a cross-sectional view showing the state in which the pen tip holding member having a sealing convex portion on its inner surface is fitted with the pen tip and the pen core. Note that both Figs. 8 and 9 show the positioning protrusion 36 provided on the inner surface of the pen tip holding member 30 being disposed in the air groove 14 provided on the abdominal side of the pen core 10.

[0055] In the mechanism according to this embodiment, a sealing protrusion 34 is provided on the inner surface of the pen tip holding member 30, which extends forward and backward so as to cover the slit 6. The sealing protrusions 34 cover the slit 6 and are in contact with the outer surfaces of the pen tip 4 on both sides of the slit 6 with a predetermined surface pressure, and the pen tip holding member 30 is fitted with the pen tip 4 and the pen core 10.

[0056] The sealing protrusion 34 is pressed against the outer surface of the pen tip 4 to seal the slit 6, thereby preventing the ink flowing in the ink groove 12 from flowing onto the inner surface of the pen tip pressing member 30. The height L3 of the sealing protrusion 34 can be, for example, about 0.2 mm to 0.8 mm. Note that in order to further improve the sealing ability of the sealing protrusion 34, an elastic sealing layer can be provided on the surface of the sealing protrusion 34.

[0057] This makes it possible to provide a fountain pen 2 with an excellent appearance in which the ink flowing inside the ink grooves 12 can be clearly seen from the outside. In addition, both the convex portion 32 provided on the inner surface of the pen tip holding member 30 shown in Figure 8 and the sealing convex portion 34 provided on the inner surface of the pen tip holding member 30 shown in Figure 9 can be applied not only to the first embodiment, but also to the fountain pen 2 of the second and third embodiments. is provided.

[0058] The fountain pen according to the present invention is not limited to the above embodiment, and includes any other writing instrument having a hollow barrel. Although the embodiment and the mode of implementation of the present invention have been described, the disclosed contents may be changed in the details of the configuration, and the combination and order of elements in the embodiment and the mode of implementation may be changed without departing from the scope and idea of ​​the claimed invention. [Explanation of symbols]

[0059] 2 fountain pen 4, 4' nib 4A Pen tip body 4B pen tip body 4a First Area 4b The second area 4c Connecting Area 6 Slit 6A Anterior area 6B Posterior area 10 Pen nibs 10A protrusion 12 Ink fountain 14 Air Groove 16 Comb groove 16A Comb component 20 shaft cylinder 22 Neck 30 Pen tip holder 32 Convex 34 Sealing protrusion 36 Positioning protrusion P Pen Point

Claims

1. a pen tip having a slit extending rearward from a pen point at a front end; a pen core having an ink groove formed at a position corresponding to the slit; a hollow pen tip pressing member that fits with the pen tip and the pen core, the pen tip and the pen core being overlapped with each other in a state where a predetermined range from the pen point of the pen tip protrudes forward beyond the pen core; a cylindrical barrel having a neck portion located behind the pen tip pressing member; Equipped with The pen tip, the pen core, and the pen tip pressing member, which are fixed to each other, are fixed to the neck portion, The slit is formed continuously from the pen point to at least a position reaching the neck portion, A fountain pen characterized in that at least the area of ​​the pen tip holder which covers the slit is translucent.

2. The fountain pen described in claim 1, characterized in that the nib holder and the barrel having the neck are separate components, and the nib, the pen core and the nib holder, which are fixed to each other, are fixed to the neck by engaging the neck with a component including at least the nib and located rearward of the engagement area with the nib holder.

3. The fountain pen as described in claim 1, characterized in that the nib holder and the neck are integrally constructed, so that the nib, the pen core and the nib holder, which are fixed to each other, are fixed to the neck.

4. A protrusion is provided on the inner surface of the pen tip pressing member, the protrusion extending forward and backward along the slit at a predetermined distance 1 from both ends of the slit, A fountain pen as described in any one of claims 1 to 3, characterized in that the convex portion comes into contact with the outer surface of the nib, so that the inner surface of the nib holding member and the outer surface of the nib on both sides of the slit are separated by a predetermined distance 2, thereby engaging the nib holding member with the nib and the pen core.

5. A sealing protrusion extending forward and backward so as to cover the slit is provided on the inner surface of the pen tip pressing member, A fountain pen as described in any one of claims 1 to 3, characterized in that the nib holder is fitted to the nib and the pen core in a state in which the sealing protrusion covers the slit and contacts the outer surface of the nib on both sides of the slit with a predetermined surface pressure.

6. A fountain pen as described in any one of claims 1 to 5, characterized in that substantially the entire outer surface of the nib protruding forward from the neck portion, except for the area forward of the pen core, is covered by the nib holder.

7. A fountain pen as claimed in any one of claims 1 to 6, characterized in that the nib is composed of two separate components, and the two components are arranged at a predetermined distance to form the slit.

8. 8. The fountain pen according to claim 1, wherein the entirety of the pen tip holder is translucent, and the entirety of the pen core is translucent.

Images