Notepads

Abstract

To provide a writing implement in which the pen tip can be easily replaced and the pen tip and the shaft are firmly engaged with each other. [Solution] The writing instrument PD1 comprises a pen tip 1 that includes a tip portion 10 from which at least one striated depression is exposed, and has a cavity 21 formed therein that opens to the opposite side of the tip portion 10, and a shaft 3 that includes a connecting portion 30 disposed within the cavity 21 and holds the pen tip 1 via the connecting portion 30. A side wall 23 of the pen tip 1 that defines the cavity 21 is detachably engaged with the connecting portion 30, and the connecting portion 30 is covered by the pen tip 1 when engaged with the pen tip 1.

Description

[Technical Field]

[0001] The present invention relates to a writing instrument. [Background technology]

[0002] Among writing implements, there is known a glass pen, in which a nib containing glass and a shaft that holds the nib are integrated. A glass pen is a type of dip pen, and is able to hold ink in the nib by utilizing capillary action caused by a streak-like depression exposed in the nib. A glass pen is a writing implement that allows continuous writing by dipping the nib in ink once (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-129861 Summary of the Invention [Problem to be solved by the invention]

[0004] In glass pens, the nib needs to be replaced when the glass in the nib deteriorates due to breakage or wear, or when the nib diameter needs to be changed. If the nib and the barrel are integrated, replacing the nib requires replacing the entire glass pen. Even if the nib contains a material other than glass, it is desirable to be able to easily replace the nib.

[0005] SUMMARY OF THE INVENTION One aspect of the present invention aims to provide a writing instrument in which the nib is easily replaceable and the nib and the barrel are securely engaged. [Means for solving the problem]

[0006] A writing instrument according to one aspect of the present invention includes a pen tip having a tip portion with at least one exposed striated depression and a cavity formed therein that opens to the opposite side of the tip portion, and a shaft having a connecting portion disposed within the cavity and holding the pen tip via the connecting portion. A side wall of the pen tip that defines the cavity is removably engaged with the connecting portion, and the connecting portion is covered by the pen tip when engaged with the pen tip.

[0007] In one of the above embodiments, the recess is exposed at the tip portion, ensuring ink retention at the tip portion. The tip portion provides continuous writing. Furthermore, since the nib is detachably engaged with the connecting portion, if the nib deteriorates over time, simply replacing the nib in the writing instrument restores its writing feel. Furthermore, if you want to change the thickness of the characters you write, simply replacing the nib is sufficient. Unlike writing instruments in which the nib and barrel are integrated, there is no need to replace the entire writing instrument, including the barrel. The nib can be easily replaced.

[0008] In one of the above embodiments, when the connecting portion of the barrel engages with the nib, a cavity is formed in the nib and the connecting portion of the barrel is disposed within the nib. Therefore, compared to an embodiment in which a cavity is formed in the connecting portion of the barrel and a portion of the nib is disposed within the connecting portion of the barrel, if the outer diameter of the connecting portion of the barrel is the same, the larger the nib, the larger the area over which the connecting portion of the barrel and the nib engage. The nib and the barrel are firmly engaged. This improves the rigidity of the entire writing instrument, making the nib less likely to wobble during writing. Furthermore, compared to an embodiment in which a portion of the nib is disposed within the connecting portion of the barrel, the larger the nib, the more precisely the positional relationship between the connecting portion of the barrel and the nib can be controlled.

[0009] In one of the above aspects, the pen tip may include a cap portion that is continuous with the tip portion and includes the opening. In a configuration in which the nib includes a cap portion, the cap portion contributes to the engagement between the connecting portion of the barrel and the nib. This further improves the rigidity of the entire writing instrument, making the nib less likely to wobble when writing. In the above-mentioned one aspect, when replacing the nib, it is sufficient to grasp the cap portion with one's hand, and there is no need to grasp the tip portion with one's hand. Oils from one's hands are less likely to adhere to the tip portion, and hands are protected from ink stains. When replacing the nib, there is no need to wash the nib each time it is replaced. Since the writer can write while holding the cap portion in their hand, the nib is less likely to move from the barrel when writing.

[0010] In one of the above aspects, the pen tip may include a bottom wall that defines the depth of the cavity and defines the cavity together with the side wall, and the connecting portion may include an end wall that abuts against the bottom wall. In a configuration in which the connecting portion includes the end wall, not only the side wall of the connecting portion but also the end wall abuts against the pen tip. This allows the pen tip to be more firmly engaged with the shaft. This further improves the rigidity of the entire writing instrument, making it even less likely for the pen tip to wobble when writing.

[0011] In one aspect, the end wall may have a contour corresponding to the contour of the bottom wall. When the end wall has the above-mentioned contoured shape, the end wall and the pen tip come into contact with each other more easily, and the pen tip is more firmly engaged with the shaft. This further improves the rigidity of the entire writing instrument, and makes the pen tip less likely to wobble when writing.

[0012] In the above-mentioned one aspect, the barrel may include a main body portion that is continuous with the connecting portion and is exposed from the pen tip. In a configuration in which the shaft includes the main body, the writer can hold not only the nib but also the main body when holding the writing instrument and writing. Because the writer can hold both the nib and the main body at the same time, the nib is less likely to wobble when writing. [Effects of the Invention]

[0013] One aspect of the present invention provides a writing instrument in which the nib is easily replaceable and the nib and the barrel are securely engaged. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view showing a writing implement according to one embodiment. [Figure 2] FIG. 2 is a diagram showing a cross-sectional configuration of the writing instrument according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description, the same elements or elements having the same functions will be designated by the same reference numerals, and redundant description will be omitted.

[0016] The configuration of a writing instrument PD1 according to this embodiment will be described with reference to Figures 1 and 2. Figure 1 is a perspective view of the writing instrument according to this embodiment. Figure 2 is a diagram showing the cross-sectional configuration of the writing instrument according to this embodiment, taken along line II-II in Figure 1. Figure 2 shows the cross-sectional configuration with the pen tip and the shaft separated.

[0017] 1 and 2, the writing instrument PD1 includes a pen tip 1 and a shaft 3 that holds the pen tip 1. The pen tip 1 and the shaft 3 are detachably engaged with each other. The pen tip 1 and the shaft 3 are aligned in a first direction D1, for example.

[0018] The pen nib 1 includes a tip portion 10 and a cap portion 20 continuous with the tip portion 10. In this embodiment, the tip portion 10 and the cap portion 20 are continuous with each other, for example, in the first direction D1. In this specification, "continuous" includes cases where the two portions are directly continuous with each other and cases where the two portions are indirectly continuous with each other via another portion. "Continuous" includes cases where the two portions are directly connected with each other and cases where the two portions are indirectly connected with each other via another portion. The tip portion 10 and the cap portion 20 are, for example, integrated. The tip portion 10 and the cap portion 20 may be fabricated separately and then integrated with each other by, for example, welding, fusion, or adhesive bonding. The pen nib 1 does not have to include the cap portion 20.

[0019] In the writing instrument PD1, the tip portion 10 is immersed in ink in an ink bottle, for example, and the tip portion 10 draws up ink by capillary action. The capillary action is due to at least one streak-like depression 11. The depression 11 is exposed at the tip portion 10. The depression 11 forms part of the surface of the tip portion 10. In this embodiment, multiple depressions 11 are formed. The depression 11 includes a groove and has a groove shape. The groove shape includes, for example, a V-groove shape. The ink drawn up into the tip portion 10 can be transferred to the paper surface, for example, by contacting the tip end 10p of the tip portion 10 with the paper surface. The ink transferred to the paper surface forms characters or figures.

[0020] Tip portion 10 includes, for example, glass. The glass included in tip portion 10 includes, for example, borosilicate glass, quartz glass, or soda-lime glass. As long as nib 1 functions as a dip pen, tip portion 10 may include, in addition to glass, metal, plastic, wood, silicon, carbon material, paper, mineral, rubber, or brush bristles, as well as any combination thereof. Cap portion 20 includes, for example, the same material as that included in tip portion 10. The material included in tip portion 10 and the material included in cap portion 20 may be different from each other.

[0021] The depression 11 starts from the most distal end 10p of the tip portion 10. When the tip portion 10 is viewed in the first direction D1, the depression 11 has, for example, a spiral shape. The depression 11 may have any other shape other than a spiral shape as long as it is suitable for absorbing ink by utilizing capillary action.

[0022] The pen tip 1 is formed with a cavity 21 that opens on the opposite side to the tip portion 10. In this embodiment, the cavity 21 is formed inside the pen tip 1 in a first direction D1. The pen tip 1 includes an opening 22 on the opposite side to the tip portion 10 in the first direction D1. In this embodiment, the cap portion 20 includes an opening 22 on the opposite side to the tip portion 10. The cavity 21 has, for example, a cylindrical shape as shown in FIG. 1 .

[0023] The pen nib 1 includes a side wall 23 that defines a cavity 21. The side wall 23 defines the width of the cavity 21 in a direction intersecting the first direction D1. When cut along an imaginary plane intersecting the first direction D1, the side wall 23 has, for example, a circular ring shape. The inner surface of the side wall 23 corresponds to the shape of the cavity 21, and has, for example, a shape corresponding to the side surface of a cylinder. The outer surface of the side wall 23 has, for example, a shape similar to the side surface of a cylinder. In this embodiment, the cap portion 20 includes the side wall 23.

[0024] The pen nib 1 includes a bottom wall 24 that, together with the side wall 23, defines the cavity 21. The bottom wall 24 determines the depth of the cavity 21 in the first direction D1. The bottom wall 24 corresponds to the shape of the cavity 21, and has a shape that corresponds to the bottom surface of a cylinder, for example. In the example shown in FIG. 2, the contour shape of the bottom wall 24 is flat. In this embodiment, the cap portion 20 includes the bottom wall 24. The nib 1 may not include the cap portion 20. In a configuration in which the nib 1 does not include the cap portion 20, the nib 1 includes an opening 22 within the nib 1 opposite the tip 10p.

[0025] The shaft 3 includes a connecting portion 30 and a main body portion 40 that is continuous with the connecting portion 30. In this embodiment, the connecting portion 30 and the main body portion 40 are continuous with each other in the first direction D1. The connecting portion 30 is disposed within the cavity 21. When engaged with the nib 1, the connecting portion 30 is covered by the nib 1, while the main body portion 40 is exposed from the nib 1. When engaged with the nib 1, for example, the entire connecting portion 30 is covered by the nib 1. When engaged with the nib 1, a portion of the connecting portion 30 may be exposed from the nib 1.

[0026] The connecting portion 30 includes a side wall 31. The side wall 31 corresponds to the shape of the cavity 21 and has a shape similar to the side surface of a cylinder, for example. Therefore, the connecting portion 30 is inserted into the cavity 21. The side wall 23 detachably engages with the connecting portion 30 (side wall 31), and this engagement allows the shaft 3 to hold the pen nib 1 via the connecting portion 30. In this specification, "engaged" includes cases where two parts are in contact with, connected to, joined to, or linked to each other.

[0027] The connecting portion 30 includes an end wall 32. The end wall 32 has a shape similar to the bottom surface of a cylinder, for example. The side wall 31 engages with the side wall 23, and the end wall 32 may abut against the bottom wall 24. The end wall 32 may engage with the bottom wall 24. For example, the contour shape of the end wall 32 corresponds to the contour shape of the bottom wall 24, i.e., has a planar shape corresponding to the planar shape of the bottom wall 24. When the side wall 31 engages with the side wall 23, the end wall 32 does not have to abut against the bottom wall 24.

[0028] As used herein, "abutting" includes cases where two portions are in contact with, connected to, joined to, or coupled to each other. In this embodiment, the outer diameter of the connecting portion 30 is smaller than the outer diameter of the side wall 23 by the thickness of the side wall 23. The outer diameter of the main body portion 40 may be the same as the outer diameter of the connecting portion 30. The "same" outer diameter may include cases where the outer diameters are equal to each other, as well as cases where the outer diameters are equal to each other, including slight differences or manufacturing errors within a predetermined range. For example, if the average outer diameter of the main body portion 40 is within a range of ±20% of the average outer diameter of the connecting portion 30, the outer diameter of the main body portion 40 is considered to be the same as the outer diameter of the connecting portion 30. The outer diameter of the main body portion 40 may be larger or smaller than the outer diameter of the connecting portion 30.

[0029] In this embodiment, the shape of the cavity 21 may be a shape other than a cylinder, such as a polygonal pillar shape such as a square pillar, or a cone shape. When the cavity 21 has a shape other than a cylinder, the side wall 23 and the bottom wall 24 have a contour shape corresponding to the shape other than a cylinder.

[0030] The bottom wall 24 may have a concave shape that approaches the most distal end 10p from the periphery toward the center. The contour shape of the bottom wall 24 may be a concave shape, i.e., a concave shape. The contour shape of the end wall 32 may have a contour shape that corresponds to the contour shape of the bottom wall 24, i.e., a raised shape that corresponds to the concave shape of the bottom wall 24, i.e., a convex shape. The contour shape of the end wall 32 may have a shape similar to the side surface of a cone, for example, as long as it corresponds to the contour shape of the bottom wall 24.

[0031] There is no particular limit to the shape that barrel 3 can take, as long as it has an outer shape that allows it to be inserted into cavity 21. Barrel 3 may include a writing implement such as a ballpoint pen, fountain pen, pencil, digital stylus pen, marker, or mechanical pencil. There is no particular limit to the material that barrel 3 can include, as long as it is a material that can be inserted into cavity 21. Barrel 3 may include glass, metal, plastic, wood, silicon, a brush, a carbon material, paper, mineral, or rubber, as well as any combination thereof.

[0032] As described above, the writing instrument PD1 comprises a pen tip 1 that includes a tip portion 10 from which at least one striated depression 11 is exposed, and that has a cavity 21 formed therein that opens to the opposite side of the tip portion 10, and a shaft 3 that includes a connecting portion 30 that is disposed within the cavity 21 and that holds the pen tip 1 via the connecting portion 30. The side wall 23 of the pen tip 1 that defines the cavity 21 is detachably engaged with the connecting portion 30, and the connecting portion 30 is covered by the pen tip 1 when engaged with the pen tip 1.

[0033] In the writing instrument PD1, the recess 11 is exposed in the tip portion 10, ensuring that ink is held securely in the tip portion 10. The tip portion 10 provides continuous writing. Furthermore, since the nib 1 is detachably engaged with the connecting portion 30, if the nib 1 deteriorates over time, simply replacing the nib 1 of the writing instrument PD1 restores the writing feel of the nib 1. Furthermore, if you wish to change the thickness of the characters you write, simply replacing the nib 1 is sufficient. Unlike writing instruments in which the nib and barrel are integrated, there is no need to replace the entire writing instrument, including the barrel. The nib 1 can be easily replaced.

[0034] In the writing instrument PD1, when the connecting portion 30 and the nib 1 engage, a cavity 21 is formed in the nib 1, and the connecting portion 30 is disposed within the nib 1. Therefore, compared to an embodiment in which a cavity is formed in the connecting portion and part of the nib is disposed within the connecting portion, if the outer diameter of the connecting portion is the same, the area in which the connecting portion 30 and the nib 1 engage is reliably increased by the amount of the larger nib 1. The nib 1 and the barrel 3 are firmly engaged. This improves the rigidity of the entire writing instrument, making the nib 1 less likely to wobble during writing. Furthermore, compared to an embodiment in which part of the nib is disposed within the connecting portion of the barrel, the positional relationship between the connecting portion 30 and the nib 1 can be controlled with high precision by the amount of the larger nib 1.

[0035] In the writing instrument PD1, the nib 1 includes a cap portion 20 that is continuous with the tip portion 10 and includes an opening 22. In the writing instrument PD1, the cap portion 20 contributes to the engagement between the connection portion 30 and the nib 1. This further improves the rigidity of the entire writing instrument, making the nib 1 less likely to wobble when writing. In the writing instrument PD1, when replacing the nib 1, it is sufficient to grasp the cap portion 20 with one's hand, and there is no need to grasp the tip portion 10 with one's hand. Oils from one's hands are less likely to adhere to the tip portion 10, and one's hands are protected from ink stains. When replacing the nib 1, there is no need to wash the nib 1 each time it is replaced. Because the writer can write while holding the cap portion 20 in his or her hand, the nib 1 is less likely to move from the shaft 3 when writing.

[0036] In the writing instrument PD1, the nib 1 includes a bottom wall 24 that defines the depth of the cavity 21 and defines the cavity 21 together with the side wall 23, and the connecting portion 30 includes an end wall 32 that abuts the bottom wall 24. In the writing instrument PD1, not only the side wall 31 but also the end wall 32 abuts against the pen tip 1. The pen tip 1 is more firmly engaged with the barrel 3. The pen tip 1 is more firmly fixed to the barrel 3. The rigidity of the entire writing instrument is further improved, and the pen tip 1 is even less likely to wobble when writing.

[0037] In writing instrument PD1, end wall 32 has a contour that corresponds to the contour of bottom wall 24. In the writing instrument PD1, the end wall 32 and the pen tip 1 come into contact with each other more easily, and the pen tip 1 is more firmly engaged with the shaft 3. This further improves the rigidity of the entire writing instrument, making the pen tip 1 even less likely to wobble when writing.

[0038] In the writing instrument PD1, the shaft 3 includes a main body portion 40 that is continuous with the connecting portion 30 and is exposed from the pen tip 1. With the writing instrument PD1, when the writer holds the writing instrument in his / her hand and writes, he / she can hold not only the pen tip 1 but also the main body portion 40. Because the writer can hold the pen tip 1 and the main body portion 40 in his / her hand at the same time, the pen tip 1 is even less likely to wobble when writing.

[0039] Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention.

[0040] For example, the tip portion 10 may include a bottom wall 24. In a configuration in which the tip portion 10 includes the bottom wall 24, the length of the side wall 23 of the nib 1 in the first direction D1 in which the tip portion 10 and the cap portion 20 are continuous with each other is longer than in a configuration in which the cap portion 20 includes the bottom wall 24. The longer the length of the side wall 23 of the nib 1, the more firmly the nib 1 engages with the barrel 3. This further improves the rigidity of the entire writing instrument, making the nib 1 less likely to wobble during writing. A configuration in which the tip portion 10 includes the bottom wall 24 is particularly effective when the cap portion 20 included in the nib 1 is small or when the nib 1 does not include a cap portion 20.

[0041] The outer diameter of the main body portion 40 may be the same as the outer diameter of the side wall 23. In a configuration in which the outer diameter of the main body portion 40 is the same as the outer diameter of the side wall 23, the writer can easily hold the nib 1 and the main body portion 40 in their hands at the same time. The nib 1 is less likely to shake when writing. The outer diameter of the main body portion 40 may be larger or smaller than the outer diameter of the side wall 23. The shaft 3 may not include the main body portion 40. If the shaft 3 does not include the main body portion 40, a portion of the connecting portion 30 may be exposed from the nib 1.

[0042] As can be understood from the above description of the embodiments, the present specification includes disclosure of the following aspects. (Appendix 1) a pen tip including a tip portion from which at least one striated depression is exposed and having a cavity formed therein that opens to the opposite side of the tip portion; a shaft including a connecting portion disposed within the cavity and holding the pen tip via the connecting portion; Equipped with a sidewall of the nib defining the cavity releasably engages with the connecting portion; The writing implement, wherein the connecting portion is covered by the nib when engaged with the nib. (Appendix 2) 2. The writing instrument of claim 1, wherein the nib includes a cap portion that is continuous with the tip portion and includes the opening. (Appendix 3) the nib includes a bottom wall defining a depth of the cavity and defining the cavity together with the side wall; 3. The writing instrument of claim 1 or 2, wherein the connecting portion includes an end wall that abuts the bottom wall. (Appendix 4) 4. The writing instrument according to claim 3, wherein the end wall has a contour corresponding to the contour of the bottom wall. (Appendix 5) 5. The writing implement according to any one of claims 1 to 4, wherein the shaft includes a main body portion that is continuous with the connecting portion and is exposed from the pen tip. [Industrial Applicability]

[0043] The present invention is useful in the field of writing instruments. [Explanation of symbols]

[0044] 1 … Pen tip 3 … axis 10 … Tip part 11 ... depression 20... Cap part 21 … Cavity 22…Aperture 23 … side wall 24... bottom wall 30 … Connection part 31 … side wall 32...end wall 40 … Main body part PD1 … writing implements

Claims

1. a pen tip including a tip portion from which at least one striated depression is exposed and having a cavity formed therein that opens to the opposite side of the tip portion; a shaft including a connecting portion disposed within the cavity and holding the pen tip via the connecting portion; Equipped with a sidewall of the nib defining the cavity releasably engages with the connecting portion; The writing implement, wherein the connecting portion is covered by the nib when engaged with the nib.

2. The writing implement according to claim 1 , wherein the nib includes a cap portion that is continuous with the tip portion and includes the opening.

3. the nib includes a bottom wall defining a depth of the cavity and defining the cavity together with the side wall; The writing implement according to claim 1 or 2, wherein the connecting portion includes an end wall that abuts against the bottom wall.

4. The writing instrument of claim 3 , wherein the end wall has a contour corresponding to a contour of the bottom wall.

5. The writing implement according to claim 1 or 2, wherein the shaft includes a main body portion that is continuous with the connecting portion and is exposed from the pen tip.

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