Case for writing instrument refills
The writing instrument refill case with a stable design and reusable structure addresses damage and environmental concerns by integrating a diagonal cut opening, ribs, and a stopper for easy handling and protection.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- PILOT PEN CO LTD
- Filing Date
- 2022-10-25
- Publication Date
- 2026-07-22
AI Technical Summary
Existing writing instrument refill packaging is prone to damage the delicate pen tip due to external forces and is not reusable after opening, leading to increased environmental load from disposable protection members.
A writing instrument refill case with a front, back, and lid integrally formed by hinges, featuring a diagonal cut opening, ribs for stability, and a stopper to protect the pen tip, allowing easy insertion and removal, and reusability.
The case stabilizes the refill, protects the pen tip, and allows easy access while being reusable, reducing environmental impact by minimizing disposable parts.
Smart Images
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Figure 0007893717000002 
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Abstract
Description
Technical Field
[0001] The present invention relates to a case for a writing instrument refill that can store a writing instrument refill inside.
Background Art
[0002] Patent Document 1 discloses a packaging bag for a writing instrument refill in which the writing instrument refill is visible from the outside. Further, Patent Document 2 discloses a packaging body for an ink cartridge for a writing instrument that, when hanging and selling an ink cartridge of a type that directly stores ink and seals an opening with a plug, even if it accidentally falls, there is no risk of the plug being opened and ink leakage occurring.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Patent Document 2
Summary of the Invention
Problems to be Solved by the Invention
[0004] In the film-made packaging bag (package) as described in Patent Document 1 and Patent Document 2, when the stored item is a writing instrument refill, since the pen tip and the like are delicate, if an unexpected force is applied from the outside, there is a risk of damaging the writing instrument refill or its pen tip and the like.
[0005] A protection member that only protects the pen tip to solve the above problems is widely used. For example, a temporary cap or the like. However, using such a protection member not only increases the number of parts, but also the protection member becomes a disposable part, which is not preferable from the viewpoint of reducing environmental load.
[0006] Furthermore, with film packaging bags (packaging bodies) such as those described in Patent Documents 1 and 2, once opened, it may become difficult to reuse them, such as by re-storing used writing instrument refills.
[0007] This invention has been made in view of the above findings, and its objective is to provide a writing instrument refill case that has a simple structure, prevents damage to the writing instrument refill or its tip, and can be reused even after opening.
[0008] In this invention, "upper" refers to the lid side of the writing instrument refill case in its assembled state, and "lower" refers to the opposite side. That is, "lower" refers to the side with the first hinge. [Means for solving the problem]
[0009] The present invention relates to a writing instrument refill case capable of storing a writing instrument refill inside, comprising: a front portion; a back portion integrally formed by the lower part of the front portion and a first hinge portion; a lid portion integrally formed by the upper part of the back portion and a second hinge portion; an opening formed by the upper edge of the front portion and the upper edge of the back portion; a storage portion for storing the writing instrument refill so that it can be inserted into and removed from the opening; longitudinally extending ribs formed on the inner surface of the storage portion; and a stopper formed on the lower inner surface of the storage portion against which the writing instrument refill abuts, wherein the opening is formed in a diagonal cut shape that slopes from the upper part of the back portion toward the lower part of the front portion when viewed from the side, and the lid portion is formed in a diagonal cut shape with substantially the same slope as the side view shape of the opening when the lid portion is closed when viewed from the side.
[0010] According to the present invention, the writing instrument refill is stably stored in the storage compartment by the ribs. In addition, the pen tip is protected by the stopper which restricts the downward movement of the writing instrument refill (i.e., movement toward the pen tip). Furthermore, the slanted cut shape of the opening (lid) allows for a wide opening, making it easy to insert and remove the writing instrument refill. Moreover, since the front, back, and lid are integrally formed parts of the case, it can be reused even after opening. In other words, it has a simple structure that prevents damage to the writing instrument refill or its pen tip, can be reused even after opening, and allows for easy insertion and removal of the writing instrument refill through the opening. [Effects of the Invention]
[0011] According to the present invention, the writing instrument refill is stably stored in the storage compartment by the ribs, the pen tip is protected by the stopper which restricts the downward movement of the writing instrument refill (i.e., movement toward the pen tip), and the opening (lid) has a diagonal cut shape which allows for a wide opening, making it easy to insert and remove the writing instrument refill. Furthermore, since the front, back, and lid are integrally formed parts of the case, it can be reused even after opening. In other words, it has a simple structure that prevents damage to the writing instrument refill or its pen tip, can be reused even after opening, and allows for easy insertion and removal of the writing instrument refill through the opening. [Brief explanation of the drawing]
[0012] [Figure 1] This is a front view showing a writing instrument refill case according to the first embodiment of the present invention, with the lid closed. [Figure 2] This is a right side view of Figure 1. [Figure 3] Figure 1 is a perspective view showing the lid in the open position, with the refill stored inside. [Figure 4] Figure 1 is a front view showing the unfolded state (before assembly) of the writing instrument refill case. [Figure 5] This is a right side view of Figure 4. [Figure 6]It is a rear view of FIG. 4. [Figure 7] It is a perspective view of FIG. 4. [Figure 8] It is a cross-sectional view taken along line A-A of FIG. 4 and shows the cross-sectional shape of the rib. [Figure 9] It is a cross-sectional view taken along line B-B of FIG. 4 and shows the cross-sectional shape of the stopper. [Figure 10] It is an enlarged view of the main part showing the state in which the pen refill is stored in the pen refill case in the first embodiment of the present invention, and shows the state in which the flange portion is in contact with the stopper. [Figure 11] It is a perspective view showing a state in which one of the stored pen refills is stored upside down with respect to FIG. 3. [Figure 12] It is a front view showing the pen refill case in the second embodiment of the present invention, and shows the state in which the lid portion is closed.
Modes for Carrying Out the Invention
[0013] Hereinafter, two embodiments of the present invention will be described with reference to the drawings.
[0014] <First Embodiment> FIGS. 至 FIG. 11 show the pen refill case 10 of the first embodiment of the present invention. FIGS. 1 to 3 are views showing the assembled state of the pen refill case 10. FIG. 1 is a front view showing the pen refill case 10 in the first embodiment of the present invention, and shows the state in which the lid portion 13 is closed. FIG. 2 is a right side view of FIG. 1. FIG. 3 is a perspective view showing the state in which the lid portion 13 of FIG. 1 is open and shows the state in which the pen refill 18 is stored.
[0015] Figures 4 to 7 are views showing the unfolded state (before assembly) of the case 10 for a writing implement refill. Figure 4 is a front view showing the unfolded state (before assembly) of the case 10 for a writing implement refill in Figure 1. Figure 5 is a right side view of Figure 4. Figure 6 is a rear view of Figure 4. Figure 7 is a perspective view of Figure 4. The case 10 for a writing implement refill of the present embodiment is a resin case integrally formed by injection molding, and Figures 4 to 7 show the state as it is taken out of the molding die.
[0016] Also, Figure 8 is a cross-sectional view taken along line A-A of Figure 4 and shows the cross-sectional shape of the rib. Figure 9 is a cross-sectional view taken along line B-B of Figure 4 and shows the cross-sectional shape of the stopper 122. Figure 10 is an enlarged view of the main part showing the state in which the writing implement refill 18 is housed in the case 10 for a writing implement refill in the first embodiment of the present invention, and shows the state in which the flange portion 183 is in contact with the stopper 122. Figure 11 is a perspective view showing the state in which one of the housed writing implement refills 18 is housed upside down with respect to Figure 3.
[0017] ·Case for writing implement refill As shown in Figures 1 to 3, the case 10 for a writing implement refill of the first embodiment includes a front portion 11, a back portion 12 integrally formed with the lower portion of the front portion 11 and the first hinge portion 14, and a lid portion 13 integrally formed with the upper portion of the back portion 12 and the second hinge portion 15.
[0018] That is, as shown in Figures 4 to 7, in the case 10 for a writing implement refill of the present embodiment, the front portion 11, the back portion 12, and the lid portion 13 are each connected by the first hinge portion 14 or the second hinge portion 15. The case 10 for a writing implement refill is a resin case integrally formed by injection molding.
[0019] Furthermore, the writing instrument refill case 10 of this embodiment includes an opening 16 formed by the upper edge of the front portion 11 and the upper edge of the back portion 12, a storage portion 17 for storing the writing instrument refill 18 so that it can be inserted into and removed from the opening 16, a longitudinally extending rib 121 formed on the inner surface of the storage portion 17, and a stopper 122 formed on the lower inner surface of the storage portion 17 against which the writing instrument refill 18 abuts.
[0020] Specifically, the first hinge portion 14 is bent from the unfolded (before assembly) writing instrument refill case 10 (Figures 4 to 7), which is integrally formed by injection molding, so that the front portion 11 and the back portion 12 face each other and fit together (Figure 3). As a result, an opening 16 is formed by the upper edge of the front portion 11 and the upper edge of the back portion 12.
[0021] Furthermore, the storage section 17 is formed in the internal space created by the opposing front section 11 and rear section 12, and stores the writing instrument refill 18 so that it can be inserted and removed axially from the opening 16. In this embodiment, the writing instrument refill case 10 can store two writing instrument refills 18.
[0022] As shown in Figures 7 and 8, the ribs 121 are formed longitudinally on the inner surface of the storage section 17 and protrude from the back section 12 toward the storage section 17. Preferably, two ribs 121 are provided near the approximate center in the short direction of the back section 12. In other words, one large rib 121 may be provided in the center in the short direction of the back section 12, but it is more preferable to provide two thin ribs 121. This suppresses the occurrence of sink marks in the molded product due to the formation of the ribs 121 and improves the quality of the molded product (the design of the outer surface of the writing instrument refill case 10).
[0023] The surface shape of the rib 121 is such that it supports the outer diameter shape (R shape) of the ink reservoir tube 181 of the writing instrument refill 18 (straight or similar R shape). As a result, when inserting the writing instrument refill 18, the rib 121 functions as a guide, allowing for stable insertion and preventing the writing instrument refill 18 from moving in the shorter direction within the writing instrument refill case 10. The dashed line in Figure 8 is a dashed line indicating the position of the ink reservoir tube 181 when the writing instrument refill 18 is stored inside.
[0024] As shown in Figure 7, the stopper 122 is formed on the lower inner surface of the storage section 17. Also, as shown in Figure 9 or Figure 10, the writing instrument refill 18 (the flange portion 183 of the holder 182) abuts against the stopper 122. Preferably, at least one stopper 122 is provided protruding from the extension of the rib 121 of the back portion 12.
[0025] Here, the inscribed circle diameter of the stopper 122 is preferably smaller than the outer diameter of the writing instrument refill 18 (outer diameter of the holder 182 and outer diameter of the end cap φ6.0~φ6.2), as shown in Figure 9. Specifically, the inscribed circle diameter of the stopper is preferably φ4.6~φ5.3. As a result, only the portion with an outer diameter smaller than the flange portion 183, including the pen tip 184 (φ4.4~φ4.5), can pass below the stopper 122. Note that the dashed line in Figure 9 is an imaginary line indicating the position of the holder 182 (flange portion 183 and the portion of the holder 182 below the flange portion 183) when the writing instrument refill 18 is stored inside.
[0026] Furthermore, as mentioned above, it is preferable that the inscribed circle diameter of the stopper 122 is smaller than the outer diameter of the tail cap. This prevents the pen tip 184 from being exposed to the outside if the writing instrument refill 18 is stored upside down, as shown in Figure 11, thus preventing the cap 13 from being closed. In other words, it prevents the user from accidentally storing the writing instrument refill 18 upside down.
[0027] This allows the pen tip 184 to be stably inserted into the storage section 17 and the stopper 122 when storing two writing instrument refills 18. In other words, the combined effect of the rib 121 and the stopper 122 prevents the pen tip 184 from being damaged by hitting the stopper 122 when storing the refills in the writing instrument refill case 10.
[0028] Furthermore, as shown in Figure 2, the opening 16 is formed in a diagonal cut shape that slopes from above the rear portion 12 to below the front portion 11 when viewed from the side. Also, when the lid portion 13 is closed, the lid portion 13 is formed in a diagonal cut shape with approximately the same slope as the side view shape of the opening 16 when viewed from the side.
[0029] A molding gate is provided on the exterior of the back portion 12 of the writing instrument refill case 10. This prevents any design impact on the front portion 11. Furthermore, because the gate is provided on the outer surface of the back portion 12, a protrusion is also formed on the inner surface (storage portion 17 side) of the back portion 12. For this reason, it is preferable that the gate be provided below the flange portion 183. This prevents any interference with the insertion and storage of the writing instrument refill 18.
[0030] In this embodiment, the writing instrument refill case 10 allows the lid 13 to be opened by pushing the front top of the lid 13 towards the back. This is possible because, as shown in Figure 2, the second hinge portion 15 is located below the front top (left side in Figure 2) of the lid 13. As a result, the lid can be easily opened even without a protrusion for opening the lid 13.
[0031] Alternatively, a projection (a projection or rib 121 that protrudes to the side) may be provided on the diagonally cut portion of the lid portion 13 so that the lid portion 13 can be opened by placing a finger on the projection. The lid portion 13 and the front portion 11 are fitted together at the lower end of the lid portion 13 and the upper horizontal opening 16 of the front portion 11 when the lid portion 13 is closed.
[0032] The writing instrument refill case 10 in this embodiment is preferably made of resin (for example, polypropylene, polyethylene, polyacetal, or polycarbonate). The writing instrument refill case 10 is particularly preferable if it is made of polypropylene or polyethylene, as this prevents the hinge from breaking even if the lid 13 is repeatedly opened and closed.
[0033] Furthermore, if the writing instrument refill case 10 is made of polypropylene or polyethylene, it is preferable because it prevents the case from being damaged even if the case 10 is dropped while the writing instrument refill 18 is stored inside, and also protects the stored writing instrument refill 18.
[0034] Furthermore, if the writing instrument refill case 10 is made of polypropylene or polyethylene, it is preferable that it be made transparent or translucent. This makes it possible to determine whether a writing instrument refill is stored inside the case 10 without opening it. Alternatively, the contents of the writing instrument refill case may be identified by printing or attaching a label to the front surface.
[0035] In this embodiment, the writing instrument refill case 10 is made of random copolymer polypropylene. This provides excellent impact resistance, increased flexibility of the hinge, improved durability, and is suitable for protecting the contents. Furthermore, the transparency is improved, making it easier to determine whether a writing instrument refill is stored inside the case 10 without opening it.
[0036] • Writing instrument refills The writing instrument refill 18 in this embodiment comprises an ink storage tube 181 made of a metal pipe, a holder 182 provided below the ink storage tube 181, a tail plug provided above the ink storage tube 181, a pen tip 184 provided below the holder 182, ink stored inside the ink storage tube 181, and an ink backflow prevention body positioned at the upper end of the ink.
[0037] The holder 182 comprises an ink reservoir tube 181 fitting portion, a flange portion 183, and a pen tip 184 fitting portion. When the writing instrument refill 18 is stored in the writing instrument refill case 10, the flange portion 183 comes into contact with the stopper 122.
[0038] Furthermore, in this embodiment, the ink contained in the ink storage tube 181 is a thermochromic ink. As shown in Figure 3, a writing instrument set can be obtained by combining the writing instrument refill case 10 and two writing instrument refills 18 stored in the writing instrument refill case 10. This embodiment is an example of such a writing instrument set.
[0039] Pen nib As shown in Figure 10, the pen tip 184 consists of a ballpoint pen tip in which a ball is rotatably held in a ball-holding chamber at the lower end of the pen tip 184. Behind the ball, a spring is provided to constantly press the ball against the inner surface of the inward-facing lower edge of the lower end of the pen tip 184.
[0040] The spring, for example, has a rod portion at the lower end of a compression coil spring, and the lower end of the rod portion is in contact with the upper surface of the ball. When not writing, the downward bias of the spring causes the ball to be in close contact with the inner surface of the inward-facing lower edge of the lower end of the pen tip 184. This prevents ink leakage and evaporation from the front end of the pen tip.
[0041] ·holder As shown in Figure 10, the upper outer circumferential surface of the holder 182 and the lower inner circumferential surface of the ink storage tube 181 are press-fitted together. In this embodiment, the upper outer circumferential surface of the holder 182 is a cylindrical body with the same outer diameter and no protrusions. Preferably, the outer diameter of the upper outer circumferential surface of the holder 182 is slightly larger than the inner diameter of the lower inner circumferential surface of the ink storage tube 181. When the holder 182 and the ink storage tube 181 are press-fitted together, it is preferable that the upper outer circumferential surface of the holder 182 is not worn down.
[0042] Furthermore, in this embodiment, the holder 182 is made of a (semi)transparent resin (polypropylene resin, thermal conductivity 0.2 W / (m·K)). This configuration allows the inside of the holder 182 between the upper end of the pen tip 184 and the lower end of the ink storage tube 181 to be seen from the outside, and the ink inside the holder 182 to be seen from the outside through the holder 182. The holder 182 may be made of resin (e.g., polyacetal, polypropylene, polyethylene) or metal (e.g., brass).
[0043] • Ink storage tube As shown in Figure 3, the ink reservoir tube 181 in this embodiment consists of a metal cylinder. The ink reservoir tube 181 is a cylindrical body with both ends open, made of stainless steel (SUS304, thermal conductivity 16 W / (m·K)). A circumferential crimping portion (not shown) is formed on the outer circumference of the lower end of the ink reservoir tube 181, and the holder 182 and the ink reservoir tube 181 are locked together in the axial direction to prevent them from coming loose. Note that the material of the ink reservoir tube 181 may be resin (polypropylene, polyethylene) instead of metal.
[0044] • tail plug As shown in Figure 3, the writing instrument refill 18 of this embodiment is equipped with a tail plug at its upper end. The tail plug is provided with an air hole that opens toward the upper end. This air hole allows air to circulate between the inside and outside of the ink storage tube 181.
[0045] In this embodiment, the lower outer surface of the tail plug and the upper inner surface of the ink storage tube 181 are press-fitted together. This locks the tail plug and the ink storage tube 181 in place to prevent them from coming loose in the axial direction.
[0046] Furthermore, the tail plug is made of synthetic resin (polyacetal resin, 0.25 W / (m·K)). The tail plug has a lower end that is inserted into the upper end of the ink storage tube 181 and an upper end that protrudes above the ink storage tube 181. The tail cap may also be made of resin (for example, polypropylene, polyethylene, polycarbonate, ABS, etc.).
[0047] · Ink In this embodiment, the ink contained in the ink storage tube 181 is a thermochromic ink. In particular, if the ink storage tube 181 is made of a metal cylinder, photodegradation of the thermochromic ink can be avoided, and the permeation of water-based thermochromic ink through the ink storage tube 181 during long-term storage can be suppressed.
[0048] The thermochromic ink is preferably a reversible thermochromic ink. Reversible thermochromic inks can be composed of various types, either individually or in combination, such as a heat-decolorizing type that decolorizes from a colored state by heating, a color-memory-retaining type that alternately stores a colored state or a decolorized state within a specific temperature range, or a heat-developing type that develops color from a decolorized state by heating and returns to a decolorized state by cooling from the colored state.
[0049] As a colorant contained in the reversible thermochromic ink, a reversible thermochromic pigment is preferably used, which is a reversible thermochromic composition containing at least three essential components: (a) an electron-donating color-developing organic compound, (b) an electron-accepting compound, and (c) a reaction medium that determines the temperature at which the chemical reaction (color reaction) between the two occurs, encapsulated in microcapsules.
[0050] Furthermore, the ink used in this invention is not limited to thermochromic inks; other ink compositions can also be used. For example, writing inks, correction fluids, liquid adhesives, or cosmetic liquids can be appropriately selected depending on the application as a liquid dispensing device. In the case of writing inks, there are no particular limitations, such as oil-based inks or water-based inks, and inks with shear viscosity reduction properties can also be used.
[0051] • Ink backflow prevention device The ink storage tube 181 contains an ink backflow prevention body made of a high-viscosity fluid, which is positioned at the upper end of the thermochromic ink and moves forward as the ink is consumed. An example of an ink backflow prevention body is a liquid stopper. The liquid stopper is made of, for example, a non-volatile liquid and / or a low-volatility liquid (base oil). Specifically, examples include petrolatum, spindle oil, castor oil, olive oil, refined mineral oil, liquid paraffin, polybutene, α-olefin, α-olefin oligomer or co-oligomer, dimethyl silicone oil, methylphenyl silicone oil, amino-modified silicone oil, polyether-modified silicone oil, and fatty acid-modified silicone oil, and one of these may be used, or two or more may be used in combination.
[0052] Non-volatile liquids and / or low-volatile liquids may be thickened to a suitable viscosity by adding a gelling agent. Examples of gelling agents include clay-based thickeners such as hydrophobic silica, methylated silica particles, aluminum silicate, swollen mica, hydrophobic bentonite or montmorillonite, fatty acid metal soaps such as magnesium stearate, calcium stearate, aluminum stearate, and zinc stearate, dextrin compounds such as tripenzylidene sorbitol, fatty acid amides, amide-modified polyethylene wax, hydrogenated castor oil, and fatty acid dextrin, and cellulose compounds. Polybutene or silicone oil is preferably used as the base oil for the ink backflow prevention body 15, and fatty acid amide or silica is preferably used as the thickener.
[0053] The writing instrument refill case 10, with the above configuration, operates as follows.
[0054] In this embodiment of the writing instrument refill case 10, the writing instrument refill 18 is stably stored in the storage section 17 by the ribs 121, the downward movement of the writing instrument refill 18 (i.e., movement toward the pen tip 184) is restricted by the stopper 122, thereby protecting the pen tip 184, and the diagonally cut shape of the opening 16 (lid 13) allows for a wide opening, making it easy to insert and remove the writing instrument refill 18. Furthermore, since the front section 11, back section 12, and lid 13 are integrally formed in the case, it can be reused even after opening. In other words, it has a simple structure that prevents damage to the writing instrument refill 18 or its pen tip 184, can be reused even after opening, and allows for easy insertion and removal of the writing instrument refill 18 through the opening 16.
[0055] Furthermore, according to the writing instrument refill case 10 of this embodiment, two writing instrument refills 18 can be stored, and two ribs 121 are provided in the center of the short side of the back portion 12. As a result, when two writing instrument refills 18 are stored, the refills 18 are stored more stably within the storage portion 17, and the formation of the ribs 121 suppresses the occurrence of sink marks in the molded product, thereby improving the quality of the molded product (the design of the outer surface of the writing instrument refill case 10).
[0056] Furthermore, according to the writing instrument refill case 10 of this embodiment, at least one stopper 122 is provided protruding from the extension of the rib 121 on the back portion 12. This allows the pen tip 184 to be stably inserted into the storage portion 17 and the stopper 122 when storing two writing instrument refills 18. In other words, it is possible to prevent damage to the pen tip by preventing it from hitting the stopper 122 when storing it in the writing instrument refill case 10.
[0057] Furthermore, according to this embodiment of the writing instrument set, it consists of a writing instrument refill case 10 and a writing instrument refill 18 housed in the writing instrument refill case 10. The writing instrument refill 18 comprises at least an ink reservoir tube 181, a holder 182 provided below the ink reservoir tube 181, a pen tip 184 provided below the holder 182, and ink housed inside the ink reservoir tube 181. The ink reservoir tube 181 is made of a metal pipe, the holder 182 has a flange portion 183 which abuts against the stopper 122, and the ink is a thermochromic ink.
[0058] This allows users to carry the writing instrument refill 18 containing the thermochromic ink without damaging it. Furthermore, the used writing instrument refill 18 can be stored directly in the writing instrument refill case 10 after replacement, improving user convenience.
[0059] <Second Embodiment> Figure 12 is a front view showing the writing instrument refill case 10 in the second embodiment of the present invention, with the lid 13 closed. The difference between the second embodiment and the first embodiment is that a window 111 is provided on the front portion 11. The other configurations of the second embodiment are substantially the same as those of the first embodiment, so a detailed explanation is omitted.
[0060] Window section As shown in Figure 12, the writing instrument refill case 10 of the second embodiment has a window 111 through the front portion 11, allowing the storage portion 17 to be viewed from the outside. Note that the window 111 only needs to be provided on at least one of the front portion 11 and the back portion 12.
[0061] This allows you to determine what is stored inside the writing instrument refill case 10 without opening it. For example, you can determine the type of ink, ink color, ink level, or the ball diameter of the pen tip without opening the writing instrument refill case 10.
[0062] Furthermore, if the window 111 is positioned so that the holder 182 can be seen from the outside, even if the ink storage tube 181 is a metal cylinder and the remaining ink level cannot be seen, the remaining ink level can be checked by looking at the holder 182. Therefore, it is possible to determine whether the writing instrument refill 18 stored in the writing instrument refill case 10 is unused or used without opening the case.
[0063] Furthermore, since a window 111 is provided in the front section 11, when removing the stored writing instrument refill 18, it can be removed by pushing it out with a finger through the window 111, improving the convenience and operability of the writing instrument refill case 10. [Explanation of symbols]
[0064] 10. Case for writing instrument refills 11 Front view 111 Window section 12 Back part 121 Rib 122 Stopper 13 Lid 14. First hinge section 15. Second hinge section 16 Opening 17 Storage compartment 18 Writing instrument refills 181 Ink storage tube 182 Holder 183 Tsuba (guard) 184 nib
Claims
1. A writing instrument refill case that can store writing instrument refills inside, Front view and The lower part of the front portion and the rear portion are integrally formed by the first hinge portion, The lid portion is integrally formed by the upper part of the rear portion and the second hinge portion, An opening formed by the upper edge of the front portion and the upper edge of the rear portion, A storage compartment for storing the aforementioned writing instrument refill so that it can be inserted and removed from the opening, A longitudinally extending rib formed on the inner surface of the storage compartment, A stopper formed on the lower inner surface of the storage compartment, against which the writing instrument refill makes contact, Equipped with, The opening is formed in a diagonal cut shape that slopes from the upper part of the rear section toward the lower part of the front section when viewed from the side. The lid is formed in a side view to have a diagonal cut shape with substantially the same inclination as the side view shape of the opening when the lid is closed, which is a case for writing instrument refills.
2. It can store two of the aforementioned writing instrument refills, The writing instrument refill case according to claim 1, wherein two ribs are provided in the center of the short side of the back portion.
3. The writing instrument refill case according to claim 2, wherein at least one stopper is provided protruding from the extension of the rib on the back surface.
4. A writing instrument refill case according to any one of claims 1 to 3, It consists of the writing instrument refills that are stored in the aforementioned writing instrument refill case, The writing instrument refill comprises at least an ink reservoir tube, a holder provided below the ink reservoir tube, a pen tip provided below the holder, and ink contained inside the ink reservoir tube. A writing instrument set in which the ink storage tube is made of a metal pipe, the holder is provided with a flange portion which is in contact with the stopper, and the ink is a thermochromic ink.