JP2019214205A - Writing instrument and writing instrument set - Google Patents

Abstract

To provide a writing instrument capable of preventing contents such as ink from leaking from a vent hole of a component even when flowing backward.SOLUTION: A component 40 mounted on a rear end of a barrel 30 is provided with: an outer cylindrical portion 50; an inner cylindrical portion 60 which has a smaller diameter and the same axial center as the outer cylindrical portion 50, and in which a front end edge 68 is located behind the front end edge of the outer cylindrical portion 50; a bottom portion 41 which closes the rear end side of the inner cylindrical portion 60; a first storage portion 61 which is a space surrounded by the bottom portion 41 and an inner peripheral surface of the inner cylindrical portion 60; a plurality of partition portions 42 which partition the space between the outer cylindrical portion 50 and the inner cylindrical portion 60 into a plurality of sections in the circumferential direction; a partition wall 46 which closes a portion on the rear end side from the front end of the inner cylindrical portion 60 in at least a part of the plurality of sections; a second storage portion 45 which is a space on the front end side from the partition wall 46 in the section having the partition wall 46; and a ventilation port 62 which connects the first storage portion 61 and the second storage portion 45.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a writing instrument and a writing instrument set including a component having a vent.

  Conventionally, a writing instrument (for example, a ball-point pen or the like) including a refill for storing ink and a shaft cylinder containing the refill has been known. A tail plug for fixing the refill was sometimes attached to the rear end of the barrel.

  However, there is a risk of suffocation, particularly when an infant swallows a tail plug by accidentally clogging the airway. In order to allow air to flow even when the airway is clogged with a tail plug, a writing instrument provided with a vent hole in the tail plug has been disclosed (see Patent Documents 1 and 2).

  In the writing implement described in Patent Literature 1, a communicating porous body is provided inside the rear end side of the refill to suppress leakage of ink. However, when an impact is applied with the tail plug facing downward, the ink may flow backward, pass through the communicating porous body, and further leak from the vent hole of the tail plug.

  Further, in the writing instrument described in Patent Literature 2, although the tail plug is provided with a ventilation hole, the amount of flow of air is such that pressure reduction in the refill can be prevented. Therefore, it has been difficult to secure air circulation to the extent that suffocation can be prevented, especially when infants clog the tail plug in the airway.

  Therefore, a tail plug that prevents the backflow of ink and ensures the flow of air has been disclosed (see Patent Document 3).

JP-A-10-119477 JP 2004-306349 A JP 2012-56129 A

  It is an object of an embodiment of the present invention to provide a writing instrument capable of preventing contents such as ink from leaking from a vent of a component even when the contents flow backward.

  In still another embodiment, it is an object to provide a writing instrument which can cope with the above-mentioned problem by exchanging various forms of refills.

In order to solve the above-mentioned problem, a first embodiment of the present application provides:
A refill containing ink,
A barrel containing the refill,
A writing tool that abuts on the rear end of the refill and has a component mounted on the rear end of the barrel.
The parts include:
A cylindrical outer tube,
An inner cylinder portion having a diameter smaller than that of the outer cylinder portion and the same axial center, and a front end edge located behind the front end edge of the outer cylinder portion;
A bottom portion closing the rear end side of the inner cylinder portion,
A first storage portion, which is a space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion, and stores the content when the content flows out from the rear end of the refill,
A plurality of partition portions that partition the space between the outer tube portion and the inner tube portion into a plurality of sections in a circumferential direction,
A partition wall that closes a portion on the rear end side from the front end of the inner cylindrical portion in at least a part of the plurality of sections,
In the section having the partition, a second storage portion that is a space on the tip side of the partition,
A notch provided in a portion of the front end edge of the inner cylindrical portion facing the second storage portion, and a ventilation port communicating the first storage portion and the second storage portion;
Is provided,
When the contents overflow from the first storage section, the contents can flow into the second storage section from the ventilation port and be stored therein. .

  Examples of the "writing implement" include a ball-point pen, a felt-tip pen, and a brush pen. In this writing instrument, the “tip” means the end on the side where the writing portion of the refill exists. On the other hand, the “rear end” means an end opposite to the front end. In the present disclosure, the side closer to the “front end” here is referred to as “front end side”, and the opposite side is referred to as “rear end side”.

  “Ink” includes, for example, oil-based ink, water-based ink, and gel ink.

  The term “refill” refers to a replaceable member having, for example, a tubular structure such as an ink storage tube for storing the ink, and a writing portion attached to the tip of the tubular structure. Examples of the refill include a ballpoint pen refill having a ballpoint pen tip as a writing portion or an ink refill having a felt pen core or a brush pen core as a writing portion.

  The term “shaft tube” refers to a cylindrical member containing the refill.

  The term “part” refers to a member attached to the rear end of the barrel, for example, a so-called tail plug. This component has the following configuration.

  The component has a double cylindrical structure with an outer “outer tube” and an inner “inner tube”. The inner cylinder has a smaller diameter and the same axis as the outer cylinder. Further, the front edge of the inner cylinder is located behind the front edge of the outer cylinder.

  The “bottom” is a structure that closes the rear end of the inner cylinder.

  The “first storage part” is a space surrounded by the inner surface of the bottom and the inner peripheral surface of the inner cylinder. The front end side of the first storage section faces the rear end of the refill housed in the barrel. When the contents have flowed out from the rear end of the refill, the flowed-out contents are stored in the first storage section. The term “contents” refers to the ink in brief, but when there is a substance (for example, a follower injected into the rear end of the ink) contained in the refill other than the ink, Including such substances.

  The "partition part" is a structure that partitions the space between the outer cylinder part and the inner cylinder part into a plurality of sections in the circumferential direction. In other words, the outer cylinder and the inner cylinder are connected by the partition.

  In at least a part of the plurality of sections, a structure that closes a portion on the rear end side from the front end of the inner cylindrical portion is a “partition wall”. That is, this partition is not provided at the front end of the inner cylinder portion, but may be provided at the rear end side, for example, at the rear end.

  And in the section where the partition is provided, the space on the tip side from the partition is the “second storage section”.

  Further, a notch is provided at a portion of the front end edge of the inner cylindrical portion facing the second storage portion, and the notch connects the first storage portion and the second storage portion with a “vent”. It has become. Through this vent, the contents overflowing from the first storage section can flow into the second storage section and be stored therein without flowing out to the ventilation section. Therefore, even when the content overflows from the refill so that it cannot be stored in the first storage unit, the content can be further stored by the second storage unit. The possibility of leakage to the outside is further reduced.

According to a second embodiment of the present application, in addition to the features of the first embodiment, the component includes a first contact portion which is a front end edge of the partition portion and an inner periphery of the inner cylinder portion. And a second abutting portion, which is a step from the leading end side, is further provided.
It is characterized in that any one of a plurality of refills formed in different shapes can be built in the barrel.

  That is, the front edge of the partition portion is a “first contact portion”. Further, on the rear end side from the first contact portion, a portion formed on the inner periphery of the inner cylindrical portion and being a stepped portion as viewed from the front end side is a "second contact portion". In other words, the diameter of the inscribed circle on the rear end side is smaller than the diameter of the inscribed circle on the front end side, bordering on the second contact portion. The diameter of the inscribed circle of the first contact portion is larger than the diameter of the inscribed circle of the second contact portion.

  As described above, a thicker refill can make contact with the first contact portion, and a thinner refill can make contact with the second contact portion. Therefore, a plurality of types, at least two types of refills, can be built in the shaft cylinder.

  According to a third embodiment of the present application, in addition to the features of the first or second embodiment, a part of the plurality of sections is provided from the front end side to the rear end side without the partition wall. It is characterized by being a penetrating part.

  In other words, a part of the plurality of partitions partitioned by the partition, and a partition penetrating from the front end side to the rear end side, is a “venting part”. In other words, in this ventilation part, there is no structure that blocks from the front end to the rear end. The opening on the rear end side of the ventilation part in the component is referred to as a ventilation hole. Thus, the inside of the component can be circulated from the ventilation hole to the opening on the distal end side of the outer cylindrical portion. Therefore, the airway is secured by the ventilation part even when the parts are ingested by mistake.

  In addition, in the section other than the ventilation section of the plurality of sections, the “partition wall” has a structure that closes a portion on the rear end side from the front end of the inner cylinder section. That is, this partition is not provided at the front end of the inner cylinder portion, but may be provided at the rear end side, for example, at the rear end.

Further, a fourth embodiment of the present application is characterized in that, in addition to the features of any of the first to third embodiments, the barrel is formed of a material whose interior is visible.
A decorative member for retaining the outer diameter of the refill on the tip side is inserted into the tip side of the barrel.

  For example, a decorative effect can be achieved by applying various costumes to the decorative member. Further, by coloring the decorative member to the same color or a similar color to the color of the ink contained in the refill, the decorative member can be visually recognized through the barrel, and is used for displaying the ink color. can do.

According to a fifth embodiment of the present application, a plurality of ink-containing refills having different shapes are provided,
A shaft cylinder capable of incorporating any of the plurality of refills,
A writing instrument set comprising
At the rear end of the barrel, a part that comes into contact with the rear end of the refill when the refill is built in the barrel is mounted,
The parts include:
A cylindrical outer tube,
An inner cylinder portion having a diameter smaller than that of the outer cylinder portion and the same axial center, and a front end edge located behind the front end edge of the outer cylinder portion;
A bottom portion closing the rear end side of the inner cylinder portion,
A first storage portion, which is a space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion, and stores the content when the content flows out from the rear end of the refill,
A plurality of partition portions that partition the space between the outer tube portion and the inner tube portion into a plurality of sections in a circumferential direction,
A first contact portion which is a front edge of the partition portion,
A second contact portion, which is a step from the tip side formed on the inner periphery of the inner cylindrical portion,
A partition wall that closes a portion on the rear end side from the front end of the inner cylindrical portion in at least a part of the plurality of sections,
In the section having the partition, a second storage portion that is a space on the tip side of the partition,
A notch provided in a portion of the front end edge of the inner cylindrical portion facing the second storage portion, and a ventilation port communicating the first storage portion and the second storage portion;
Is provided,
When the contents overflow from the first storage section, the contents can flow into the second storage section from the ventilation port and be stored therein. .

  That is, the writing implement set of the present embodiment is such that the writing implement is formed by combining any one of the plurality of refills with the barrel.

  The significance of each configuration in this embodiment is the same as each configuration in the first and second embodiments.

  This writing instrument set can be formed, for example, as a product including the plurality of refills and the barrel.

  According to a sixth embodiment of the present application, in addition to the features of the fifth embodiment, a part of the plurality of sections is provided with a vent that penetrates from a front end to a rear end without the partition wall. It is characterized by being a part.

  The significance of the ventilation section is as described in the third embodiment.

According to a seventh embodiment of the present application, in addition to the features of the fifth or sixth embodiment, the barrel is formed of a material whose interior is visible.
A decorative member for retaining the outer diameter of the refill on the tip side is inserted into the tip side of the barrel.

  The significance of each configuration in the present embodiment is the same as each configuration in the fourth embodiment.

  According to an eighth embodiment of the present application, in addition to the features of any of the fifth to seventh embodiments, the barrel is a barrel for a knock-type writing instrument having a knock button at a rear end. It is characterized by.

  That is, although the barrel constituting the writing instrument set may be a barrel for a writing instrument having a detachable cap, in the present embodiment, in place of or in addition to this, a knock-type writing instrument is used. Is provided.

  Since each embodiment of the present application is configured as described above, the following effects can be obtained.

  That is, according to the first embodiment, the contents flowing out from the rear end of the refill are stored in the first storage unit. Thereby, even if the contents flow backward, it is possible to prevent the contents from leaking out of the ventilation section.

  Further, the ink overflowing from the first storage section flows into the second storage section from the ventilation port, is stored, and does not flow out to the ventilation section. Thereby, even if the ink overflows from the first storage section, it can be prevented from leaking to the outside from the ventilation section.

  According to the second embodiment, in addition to the effects of the first embodiment, a plurality of refills can be accommodated in the barrel.

  Further, according to the third embodiment, in addition to the effects of the first or second embodiment, air flows through the inside of the component by the ventilation portion. This can secure the airway and prevent suffocation, especially when the infant clogs the airway with the parts.

  According to the fourth embodiment, in addition to the effects of any one of the first to third embodiments, the decorative member allows various design effects and the color of the ink contained in the refill. A display effect can be exhibited.

Further, according to the fifth embodiment,
The contents flowing out from the rear end of the refill are stored in the first storage unit. Thereby, even if the contents flow backward, it is possible to prevent the contents from leaking out of the ventilation section.

  Further, the ink overflowing from the first storage section flows into the second storage section from the ventilation port, is stored, and does not flow out to the ventilation section. Thereby, even if the ink overflows from the first storage section, it can be prevented from leaking to the outside from the ventilation section.

  Further, a plurality of refills can be accommodated in the barrel.

  Further, according to the sixth embodiment, in addition to the effects of the fifth embodiment, air flows through the inside of the component by the ventilation portion. This can secure the airway and prevent suffocation, especially when the infant clogs the airway with the parts.

  According to the seventh embodiment, in addition to the effects of the fifth or sixth embodiment, the decorative member exerts various design effects and an effect of displaying the color of the ink contained in the refill. Can be done.

  Further, according to the eighth embodiment, the effects of any of the fifth to seventh embodiments can be achieved in a knock-type writing instrument.

It is a side view (A) and a side sectional view (B) of the writing instrument according to the first embodiment. It is the side view (A) and side sectional drawing (B) of the refill in the writing implement of FIG. FIG. 2 is a side view (A) and a side cross-sectional view (B) of the barrel in the writing instrument of FIG. 1. FIG. 2 is a perspective view, a side sectional view, and a bottom view of a decorative member in the writing instrument of FIG. 1. FIG. 2 is a side view of components in the writing instrument of FIG. 1. FIG. 6 is a plan view of the component of FIG. 5. FIG. 6 is a bottom view of the component of FIG. 5. FIG. 8 shows the component of FIG. 5 in a section taken along line VIII-VIII in FIGS. 6 and 7. FIG. 8 shows the part of FIG. 5 in a section taken along line IX-IX in FIGS. 6 and 7. FIG. 8 is a perspective view of the component of FIG. 5, showing a partial cross-section XX in FIGS. 6 and 7. FIG. 2 is a side sectional view of a rear end portion of the writing instrument of FIG. 1. FIG. 2 is a perspective sectional view of a rear end portion of the writing instrument of FIG. 1. It is the side view (A) and side sectional drawing (B) of the writing implement which concerns on 2nd Embodiment. FIG. 14 is a side view (A) and a side sectional view (B) of a refill in the writing instrument of FIG. 13. FIG. 14 is a side sectional view of the latter half of the writing implement in the writing implement of FIG. 13. It is a front view of the writing implement set concerning a 3rd embodiment. It is the side view (A) and side sectional drawing (B) of the writing implement which concerns on 4th Embodiment. It is the side view (A) and side sectional drawing (B) of the writing implement which concerns on 5th Embodiment. FIG. 19 is a side view (A), a front perspective view (B), and a rear perspective view (C) of components in the writing instrument of FIGS. 17 and 18. FIG. 20 is a bottom view of the component of FIG. 19. FIG. 21 shows the part of FIG. 19 in a cross section XXI-XXI in FIG. 20. FIG. 21 shows the part of FIG. 19 in a cross section XXII-XXII in FIG. 20.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, among the reference numerals described in the respective drawings, those common to a plurality of drawings have the same technical significance even when not described in the following description of the respective drawings. In the drawings shown as side views, the left side of the drawing is the flat side and the front end side, and the right side of the drawing is the bottom side and the rear end side.

(First embodiment)
<Appearance>
FIG. 1A is a side view of a writing instrument 10 according to the first embodiment. As shown in the figure, the writing implement 10 of the present embodiment is configured as a ballpoint pen. The writing instrument 10 has an appearance in which a cap 36 having a clip 37 is attached to the tip of a shaft cylinder 30 having a tail plug component 40 attached to the rear end.

  FIG. 1B is a side sectional view of the writing instrument 10. As shown in this drawing, in the writing instrument 10 of the present embodiment, a refill 20 containing ink 24 is built in the barrel 30, and the rear end of the refill 20 contacts the component 40. Supported. In this refill 20, a ball-point pen tip 21 is mounted via a joint 22 at the tip of an ink storage tube 23 that stores the ink 24. A resin ball 26 is attached to the tip of the ballpoint pen tip 21. The resin ball 26 is mounted for the purpose of protecting the tip of the ballpoint pen tip 21, and is removed before using the refill 20. Further, a grease-like follower 25 is injected into the rear end of the ink 24 contained in the refill 20. A decorative member 70 is inserted between the distal end of the refill 20 and the inner surface of the distal end of the barrel 30, which will be described later.

<Refill 20>
FIG. 2A is a side view of the refill 20 in the writing instrument 10. As described above, the refill 20 has an appearance in which a metal ball-point tip 21 is attached to a tip of a cylindrical synthetic resin ink storage tube 23 via a synthetic resin joint 22.

  FIG. 2B is a side sectional view of the refill 20 in the writing instrument 10. As described above, the ink 24 is stored in the ink storage tube 23 as described above. The ink 24 of the present embodiment is an aqueous gel ink. In addition to the ink 24, a grease-like follower 25 is injected at the rear end. Note that a cylindrical float made of a synthetic resin adjusted to have the same specific gravity may be floated in the follower 25.

<Shaft tube 30>
FIG. 3A is a side view of the barrel 30 in the writing instrument. The shaft cylinder 30 is formed in a cylindrical shape using a synthetic resin whose interior is visible. The tip portion of the shaft cylinder 30 is a tapered portion 31 whose outer diameter is once reduced, and the outer periphery thereof is further tapered.

  FIG. 3B is a side sectional view of the shaft cylinder 30. An opening 35 is formed at the tip of the tapered portion 31, from which the ballpoint pen tip 21 of the refill 20 projects (see FIG. 1B). The cap 36 is detachably attached so as to cover the tapered portion 31 of the shaft cylinder 30 (see FIGS. 1A and 1B).

  As shown in FIG. 3B, a stepped concave portion 33 is formed in the rear end portion of the shaft cylinder 30 so that the inner periphery thereof is stepwise enlarged in diameter toward the rear end. A female screw groove 34 for screwing the component 40 is formed in a rear end portion of the stepped concave portion 33. On the other hand, a locking projection 32 protruding inward is formed on the inner peripheral surface of the distal end portion of the shaft cylinder.

<Decoration member 70>
FIG. 4A is a perspective view showing the appearance of the decorative member 70. The decorative member 70 is made of a synthetic resin colored in the same color or a similar color to the color of the ink 24, and a front portion 71 whose outer circumference is tapered is integrally formed on the tip side of a substantially cylindrical rear portion 72. It has a formed appearance. On the outer periphery of the rear portion 72, a vibration-suppressing ridge 73 as an anti-sway with the shaft cylinder 30 is formed to protrude annularly. Further, a locking ridge 78 is formed on the rear end side of the vibration damping ridge 73 and on the outer rear end of the rear portion 72. When the locking projections 78 are mounted on the shaft cylinder 30, the locking projections 32 are positioned over the locking projections 32 by elastic deformation so as to get over the locking projections 32. 78 are mutually locked. A front opening 74 is formed at the front end of the front part 71.

  FIG. 4B is a side sectional view of the decorative member 70. FIG. 4C is a bottom view of the decorative member 70. As shown in these figures, the inner peripheral surface of the decorative member 70 has a reduced-diameter stepped portion 75 whose front end side is reduced in a stepped shape, and the front opening 74 as a smaller-diameter hole is formed therefrom. Is formed. The ballpoint pen tip 21 of the refill 20 penetrates the front opening 74 (see FIG. 1B). The rear end of the rear portion 72 is a rear opening 76 having a larger diameter than the front opening 74. Further, on the inner peripheral surface of the decoration member 70, six inner ribs 77 extending in the longitudinal direction are provided inwardly so as to be equally arranged with respect to the axis. These inner ribs 77 support the outer periphery of the joint 22 of the refill 20 (see FIG. 1B).

  With the configuration described above, the decorative member 70 has the function of maintaining the outer diameter of the tip portion of the refill 20 and, as described above, is colored in the same color or the same color as the color of the ink 24, so that the refill 20 also has a function of displaying the color of the ink 24 contained in the ink.

<Parts 40>
FIG. 5 is a side view of the component 40 in the writing instrument 10. As shown in the drawing, in the component 40, an outer cylindrical portion 50 having a substantially cylindrical appearance is visually recognized in a side view. On the outer peripheral surface on the rear end side of the outer cylindrical portion 50, six convex portions 53 are equally arranged and protruded along the longitudinal direction. Further, the outer peripheral surface on the distal end side of the outer cylinder portion is formed to have a slightly smaller diameter, and when this portion is mounted on the shaft cylinder 30, it is fitted into the stepped concave portion 33 (see FIG. 3B). It is a part 52. A male screw groove 51 for screwing with the female screw groove 34 is formed in a rear portion of the fitting portion 52.

  FIG. 6 is a plan view of the component 40. FIG. 7 is a bottom view of the component 40. FIG. 8 is a sectional view taken along the line VIII-VIII in FIGS. 6 and 7. FIG. 9 is a sectional view taken along the line IX-IX in FIGS. 6 and 7. FIG. 10 is a perspective view of the component 40, and shows a partial cross-section XX in FIGS. 6 and 7.

  As shown in FIGS. 6 to 10, the component 40 includes a larger-diameter cylindrical outer cylindrical portion 50 and a smaller-diameter cylindrical inner cylindrical portion 60 housed in the outer cylindrical portion 50. have. More specifically, the inner cylindrical portion 60 is located at the same axial center in the outer cylindrical portion 50 (see FIGS. 6 and 7). The open front end of the inner cylinder portion 60 is located closer to the rear end than the open front end of the outer cylinder portion 50 (see FIGS. 8 to 10). Further, the rear end side of the inner cylinder portion 60 is closed by a bottom portion 41 (see FIGS. 7 to 10). The bottom 41 is also visible from the tip (see FIG. 6).

  In addition, the bottom part 41 can be regarded as a surface on the rear end side of the outer cylinder part 50. That is, the bottom portion 41 of the outer cylinder portion 50 has some openings (vent holes 44 (see FIG. 7 described later)) to close at least the rear end side of the inner cylinder portion 60. It can also be said. When grasped in this manner, the bottom portion 41 is a portion that closes at least the central portion at the rear end of the outer cylindrical portion 50 at the rear end side, and has a cylindrical shape that protrudes forward from the inner surface of the central portion of the bottom portion 41. Can be said to be the inner cylindrical portion 60. A space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion 60 is referred to as a first storage portion 61 (see FIGS. 8 to 10).

  The outer cylindrical portion 50 and the inner cylindrical portion 60 are connected in a longitudinal direction by six equally-partitioned partition portions 42 (see FIGS. 6 and 7). The space between the outer cylinder 50 and the inner cylinder 60 is divided into six sections in the circumferential direction by these partitions 42.

  In some, specifically four, of these six sections, the part from the front end to the rear end is completely penetrated (see FIG. 9). These four sections are referred to as a vent 43 (see FIGS. 6 and 7). The rear edges of these ventilation portions 43 can be recognized as holes when viewed from the bottom (see FIG. 7). These holes are referred to as ventilation holes 44. The ventilation part 53 allows air to flow through the inside of the component 40 from the ventilation hole 44 to the cylinder opening on the distal end side of the outer cylinder part 50. If the airway is blocked, suffocation can be prevented.

  In the remaining two sections of the six sections other than the ventilation section 43, a portion on the rear end side from the front end of the inner cylindrical portion 60 is closed by the partition wall 46 (FIG. 6 and FIG. 7). In these two sections, the space on the tip side of the partition wall 46 is referred to as a second storage section 45 (see FIG. 10). A notch is provided in a portion of the front end edge of the inner cylindrical portion 60 facing the second storage portion 45. This notch is a ventilation port 62 that connects the first storage section 61 and the second storage section 45. When the ink 24 in the refill 20 is reduced by writing, external air flows into the ink storage tube 23 from the ventilation port 62.

  The distal end face of the partition part 42 is referred to as a first contact part 47. Six front ribs 54 projecting inward from the first contact portion 47 extend inward (see FIGS. 8 to 10). These six front ribs 54 are portions that come into contact with the outer periphery of the rear end portion of the refill 20.

  Six rear ribs 64 are provided on the inner peripheral surface of the rear end side of the first storage portion 61 along the longitudinal direction (see FIG. 10). Is referred to as a second contact portion 63 (see FIGS. 6 and 10). In other words, on the rear end side of the first abutting portion 47, a portion that is formed on the inner periphery of the inner cylindrical portion 60 and is a stepped portion when viewed from the distal end side is the second abutting portion 63. . That is, the inscribed circle diameter on the rear end side is smaller than the inscribed circle diameter on the front end side with respect to the second contact portion 63. The diameter of the inscribed circle of the first contact portion 47 is larger than the diameter of the inscribed circle of the second contact portion 63.

  The component 40 has the above-described structure integrally formed of a synthetic resin.

<Mounting of component 40>
In the present embodiment, first, the decorative member 70 shown in FIGS. 4A to 4C is attached to the barrel 30 shown in FIGS. 3A and 3B. Next, the refill 20 shown in FIGS. 2A and 2B is mounted from the rear end of the barrel 30. Then, the male screw groove 51 of the component 40 shown in FIGS. 5 to 10 is screwed into the female screw groove 34 at the rear end of the barrel 30. In this manner, the component 40 is mounted on the barrel 30, as shown in FIG. 11, which is a side sectional view of the rear end portion of the writing instrument 10. In this state, the rear end of the ink storage tube 23 is supported by the component 40 while being in contact with the first contact portion 47. The tolerance of the entire length of the refill 20 can be adjusted by the degree of screwing of the component 40 into the barrel 30.

  FIG. 12 is a perspective sectional view of a rear end portion of the writing instrument 10. As described above, the first contact portion 47 contacts the rear edge of the ink storage tube 23. The space surrounded by the inner surface of the bottom portion 41 and the inner peripheral surface of the inner cylindrical portion 60 is the first storage portion 61 as described above. In the first storage section 61, when a content such as the ink 24 flows out from the rear end of the ink storage tube 23 in addition to the follower 25, the first storage section 61 can store the ink. . In addition, a play may be provided between the first contact portion 47 and the rear end edge of the ink storage tube 23 to such an extent that the content does not exude due to surface tension.

  In addition, a gap between the front rib 54 and the outer periphery of the rear end of the refill 20 may be formed so that the content does not exude due to surface tension. That is, when the component 40 is mounted on the rear end of the barrel 30, the rear end portion of the refill 20 may be loosely fitted inside the six front ribs 54.

  The method of fixing the component 40 is not limited to the screwing described above. For example, projections are provided on the outer periphery of the outer cylinder portion 50 and the inner periphery of the shaft cylinder 30 in place of the male screw groove 51 and the female screw groove 34, and the protrusions are engaged with each other to form the component 40. May be fixed. Alternatively, instead of the male screw groove 51 and the female screw groove 34, a protrusion is provided on one of the outer periphery of the outer cylinder portion 50 or the inner periphery of the shaft cylinder 30 and a groove is provided on the other, and the groove is provided in the groove. The component 40 may be fixed by fitting the projection. Alternatively, the component 40 may be fixed to the barrel 30 by bonding with an adhesive, or the component 40 and the barrel 30 may be fixed by welding using a laser or the like. Alternatively, the front rib 54 may be formed so as to be pressed against the outer periphery of the rear end portion of the refill 20. That is, when the component 40 is mounted on the rear end of the barrel 30, the component 40 is mounted so that the rear end portion of the refill 20 is pressed into the inside of the six front ribs 54. It may be.

<Backflow of contents>
With reference to FIG. 12, the backflow of contents such as the ink 24 and the follower 25 stored in the ink storage tube 23 will be described. If an impact is applied to the writing implement 10 or the writing implement 10 is left for a long time with the ballpoint pen tip 21 facing upward, the contents of the ink storage tube 23 may flow backward toward the component 40. The content that has flowed back as described above flows into the inner cylinder part 60 and is stored in the first storage part 61.

  When the contents continue to flow into the first storage portion 61 and the contents stored in the first storage portion 61 overflow to the ventilation port 62 of the inner cylinder portion 60, the contents are ventilated. It flows into the second storage section 45 through the port 62. The contents that have flowed into the second storage part 45 are not blocked by the partition part 42 and flow out to the adjacent ventilation part 43, but continue to be stored in the second storage part 45. In this way, even if the contents flow backward, it is possible to prevent the contents from leaking from the air holes 44 of the component 40.

(Second Embodiment)
<Appearance>
FIG. 13A is a side view of the writing instrument 10 according to the second embodiment. As shown in the figure, the writing implement 10 of the present embodiment is configured as a ballpoint pen. The writing instrument 10 has an appearance in which a cap 36 having a clip 37 is attached to the tip of a shaft cylinder 30 having a tail plug component 40 attached to the rear end.

  FIG. 13B is a side sectional view of the writing instrument 10. As shown in this drawing, in the writing instrument 10 of the present embodiment, a refill 20 containing ink 24 is built in the barrel 30, and the rear end of the refill 20 contacts the component 40. Supported. In this refill 20, a ball-point pen tip 21 is mounted at the tip of an ink storage tube 23 that stores the ink 24. A resin ball 26 is attached to the tip of the ballpoint pen tip 21. The resin ball 26 is mounted for the purpose of protecting the tip of the ballpoint pen tip 21, and is removed before using the refill 20. A decorative member 70 is inserted between the distal end of the refill 20 and the inner surface of the distal end of the barrel 30, which is the same as in the first embodiment (FIG. 4A). ) To FIG. 4 (C)).

<Refill 20>
FIG. 14A is a side view of the refill 20 in the writing instrument 10. As described above, the refill 20 has an appearance in which a metal ball-point pen tip 21 is mounted on the tip of a cylindrical ink-containing tube 23 made of synthetic resin.

  FIG. 14B is a side sectional view of the refill 20 in the writing instrument 10. As described above, the ink 24 is stored in the ink storage tube 23 as described above. The ink 24 of the present embodiment is an oil-based ink. The diameter of the ink storage tube 23 in the present embodiment is smaller than the diameter of the ink storage tube 23 in the first embodiment (see FIGS. 2A and 2B).

<Shaft tube 30>
The shaft cylinder 30 is the same as in the first embodiment (see FIGS. 3A and 3B).

<Parts 40>
The component 40 is the same as in the first embodiment (see FIGS. 5 to 10).

<Mounting of component 40>
In the present embodiment, first, the decorative member 70 (FIGS. 4A to 4C) is mounted on the barrel 30 (see FIGS. 3A and 3B). Next, the refill 20 shown in FIGS. 14A and 14B is mounted from the rear end of the barrel 30. Then, the male screw groove 51 of the component 40 is screwed into the female screw groove 34 at the rear end of the shaft cylinder 30. In this manner, the component 40 is mounted on the barrel 30 as shown in FIG. 15 which is a side cross-sectional view of the rear end portion of the writing instrument 10. In this state, the rear end of the ink storage tube 23 is supported by the component 40 while being in contact with the second contact portion 63. The tolerance of the entire length of the refill 20 can be adjusted by the degree of screwing of the component 40 into the barrel 30.

(Summary of First Embodiment and Second Embodiment)
As described above, the barrel 30, the decorative member 70, and the component 40 have a common structure in the first embodiment and the second embodiment. And, with this common structure, the refills 20 having different shapes, such as the refill 20 having a relatively large diameter as in the first embodiment and the refill 20 having a relatively small diameter as in the second embodiment. , 20 can be built-in. Regardless of the type of the refill 20, the tolerance of the length can be finely adjusted by the screwing state of the component 40 into the shaft cylinder 30.

(Writing implement set 80)
FIG. 16 is a front view of a writing instrument set 80 according to the third embodiment. In the writing instrument set 80, the shaft cylinder 30 to which the cap 36 having the component 40 and the clip 37 is mounted, and the refills 20 in the first embodiment and the second embodiment are transparent. It is included in a resin packaging 81. Each refill 20, 20 is of a different ink type, or has a different ink viscosity or ink color. However, since the refills 20 and 20 contain the ink amounts that make the writable distances substantially equal, when the use frequencies of the refills 20 and 20 are almost equal, only one of the refills is used first. Is less likely to occur and user convenience is improved. The different ink types indicate different types of main solvents used for the ink, and include so-called oil-based inks, aqueous inks, and emulsion inks.

  In use, the barrel 30 and each refill 20, 20 are taken out of the packaging 81, and after removing the part 40 from the barrel 30, any one of the refills 20, 20 is It is inserted into the barrel 30 and the component 40 is attached as described above. Thereby, the writing implement 10 according to the first embodiment (see FIGS. 1A and 1B) or the writing implement 10 according to the second embodiment (see FIGS. 13A and 13B). Is formed.

(Fourth embodiment)
<Appearance>
FIG. 17A is a side view of the writing instrument 10 according to the fourth embodiment. As shown in this figure, the writing implement 10 of the present embodiment is configured as a so-called knock-type writing implement in which a knock cover 39 as a knock button projects from the rear end of the barrel 30. A clip 37 is integrally formed on a rear end side surface of the barrel 30 of the writing instrument 10. A tip shaft 30 </ b> A having a tapered portion 31 whose outer periphery is tapered is attached to the tip of the shaft cylinder 30.

  FIG. 17B is a side cross-sectional view of the writing instrument 10 of FIG. As shown in the drawing, in the writing instrument 10 of the present embodiment, a refill 20 containing ink 24 is built in the barrel 30, and a component 40 as a rotor is provided at the rear end of the refill 20. It is installed. The ink 24 is an aqueous gel ink, and a grease-like follower 25 is injected into the rear end of the ink 24 in the ink storage tube 23. In the present embodiment, the rear end of the refill 20 is held by the outer cylindrical portion 50 constituting the front end side of the component 40. Further, at the rear end of the component 40, a knock bar 38 for allowing the refill 20 to protrude and retract, and a knock cover 39 fitted to the knock bar 38 as a color or function display member are provided. The length and outer diameter of the ink storage tube 23 in the refill 20 are the same as those of the refill 20 in the first embodiment (see FIGS. 2A and 2B). This is the same as the first embodiment.

  The rear portion of the front shaft 30A is screwed into and fixed to the inner peripheral surface of the distal end of the barrel 30, and the front portion is the above-described tapered portion 31. An opening 35 is formed at the tip of the tapered portion 31, from which the ballpoint pen tip 21 of the refill 20 protrudes and retracts as the knock cover 39 is operated. In the present embodiment, a knock spring 27 is interposed between the joint 22 of the refill 20 (see FIG. 2B) and a step formed slightly behind the opening 35 of the front shaft 30A. Have been.

  An annular decorative member 70 having elasticity is inserted between the tip of the refill 20 and the inner surface of the tip of the barrel 30, and functions as a steady rest inside the barrel 30 of the refill 20. .

(Fifth embodiment)
<Appearance>
FIG. 18A is a side view of the writing instrument 10 according to the fifth embodiment. As shown in this figure, the writing implement 10 of the present embodiment is configured as a so-called knock-type writing implement in which a knock cover 39 as a knock button projects from the rear end of the barrel 30. A clip 37 is integrally formed on a rear end side surface of the barrel 30 of the writing instrument 10. A tip shaft 30 </ b> A having a tapered portion 31 whose outer periphery is tapered is attached to the tip of the shaft cylinder 30.

  FIG. 18B is a side cross-sectional view of the writing instrument 10 of FIG. In the writing instrument 10 of the present embodiment, a refill 20 having a structure substantially similar to that of the refill 20 (see FIGS. 14A and 14B) in the second embodiment is mounted. The structures of the shaft 30A, the component 40 as a rotor, the knock bar 38, and the knock cover 39 are the same as those in the fourth embodiment. The ink 24 contained in the refill 20 is an oil-based ink. In the present embodiment, the rear end of the refill 20 is held by the inner cylindrical portion 60 constituting the rear side of the component 40. Further, in the present embodiment, a protruding portion 23A formed so as to protrude outward near the tip of the ink storage tube 23 of the refill 20, and a step portion formed slightly behind the opening 35 of the front shaft 30A. And a knock spring 27 is interposed therebetween.

  A flat ring-shaped decorative member 70 having elasticity is inserted between the front end of the refill 20 and the inner surface of the front end of the shaft cylinder 30. The outer diameter of the decorative member 70 is formed to be larger than the inner diameter of the barrel 30, and when the refill 20 is inserted into the barrel 30, the outer peripheral side is bent in the axial direction, so that the refill 20 It functions as a steady rest inside the barrel 30.

(Parts 40)
The component 40 as the rotor described above is common to the fourth embodiment and the fifth embodiment. FIG. 19 (A) is a side view of the component 40, FIG. 19 (B) is a front perspective view thereof, and FIG. 19 (C) is a rear perspective view thereof. As shown in these drawings, a front portion of the component 40 is an outer cylindrical portion 50 having a substantially cylindrical appearance in a side view. An inner cylinder portion 60 having a smaller diameter and the same axial center as the outer cylinder portion 50 is integrally formed behind the outer cylinder portion 50. The front end edge 68 of the inner cylindrical portion 60 projects slightly forward from the bottom surface of the outer cylindrical portion 50 as shown in FIG. From the rear end of the inner cylindrical portion 60, a substantially cylindrical connection protrusion 67 having a smaller diameter is protruded. The connection projection 67 is a part involved in connection with the knock bar 38 located at the rear as shown in FIGS. 17B and 18B. Further, on the outer side surface of the inner cylindrical portion 60, side ribs 65 are formed which are equally distributed in three directions (see FIG. 19C) and are formed along the longitudinal direction. The rear end surface of the side rib 65 and the rear end surface of the inner cylindrical portion 60 constitute cam teeth 66 involved in cam operation with the knock bar 38 located rearward.

  FIG. 20 is a plan view of the component 40. FIG. 21 is a cross-sectional view along XXI-XXI in FIG. FIG. 22 is a sectional view taken along line XIII-XIII in FIG.

  As shown in FIGS. 20 to 22, the component 40 has a larger-diameter cylindrical outer cylindrical portion 50, most of which are located behind the outer cylindrical portion 50, and only a portion of the front edge 68. Has an inner cylindrical portion 60 having a smaller diameter and located inside the outer cylindrical portion 50. The inner cylinder 60 has the same axial center as the outer cylinder 50 (see FIG. 20). The open front end of the inner cylinder 60 is located closer to the rear end than the open front end of the outer cylinder 50 (see FIG. 21). Further, the rear end side of the inner cylindrical portion 60 is closed by a bottom portion 41 (see FIGS. 20 to 22). The bottom portion 41 is also visible from the tip side (see FIG. 20). From the rear end of the inner cylindrical portion 60, the connection protrusion 67 described above is provided so as to protrude therefrom.

  A space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion 60 is referred to as a first storage portion 61 (see FIGS. 20 to 22).

  The inner side surface of the outer cylindrical portion 50 and the front end edge 68 of the inner cylindrical portion 60 are connected by six equally-partitioned partition portions 42 (see FIG. 20). The space between the outer cylinder 50 and the inner cylinder 60 is divided into six sections in the circumferential direction by these partitions 42.

  In these six sections, a portion on the rear end side of the front end edge 68 of the inner cylindrical portion 60 is closed by the partition wall 46 (see FIGS. 20 and 21). These six sections closed by the partition walls 46 are referred to as second storage sections 45 (see FIGS. 20 and 21). In two of the six sections facing each other across the axis, a notch is provided at the front end edge 68 of the inner cylindrical portion 60. This notch is a ventilation port 62 that connects the first storage section 61 and the second storage section 45. When the ink 24 in the refill 20 is reduced by writing, external air flows into the ink storage tube 23 from the ventilation port 62.

  The distal end face of the partition part 42 is referred to as a first contact part 47. Six front ribs 54 projecting inward from the first abutting portion 47 extend inward (see FIGS. 20 to 22). These six front ribs 54 are portions that come into contact with the outer periphery of the rear end portion of the refill 20.

  In addition, six rear ribs 64 are provided on the inner peripheral surface of the rear end side portion of the first storage portion 61 along the longitudinal direction (see FIGS. 20 to 22). Is referred to as a second contact portion 63 (see FIGS. 20 to 22). In other words, on the rear end side of the first abutting portion 47, a portion that is formed on the inner periphery of the inner cylindrical portion 60 and is a stepped portion when viewed from the distal end side is the second abutting portion 63. . That is, the inscribed circle diameter on the rear end side is smaller than the inscribed circle diameter on the front end side with respect to the second contact portion 63. The diameter of the inscribed circle of the first contact portion 47 is larger than the diameter of the inscribed circle of the second contact portion 63.

  The component 40 has the above-described structure integrally formed of a synthetic resin.

<Mounting of component 40>
In the present embodiment, the knock bar 38 (see FIGS. 17 and 18) is inserted rearward from the distal end of the barrel 30 in a state where the knock bar 38 (see FIGS. 17 and 18) is externally inserted into the connection protrusion 67 of the component 40. Then, a knock cover 39 is attached to a knock bar 38 protruding from the rear end of the barrel 30 as shown in FIGS. 17 and 18.

  In the fourth embodiment, the decoration member 70 (see FIG. 17B) is extrapolated to the larger diameter refill 20 (see FIGS. 2A and 2B), and Is inserted from the front end of the barrel 30. Then, the rear end of the refill 20 enters the outer cylindrical portion 50 of the component 40 and is held in a state of being in contact with the first contact portion 47 (see FIG. 17B). At this time, the decoration member 70 functions as a steady rest of the refill 20 by being sandwiched between the outer surface of the refill 20 and the inner surface of the barrel 30. In this state, the knock spring 27 is externally inserted at the tip of the refill 20, and then the tip shaft 30A is screwed onto the tip of the barrel 30, thereby obtaining the writing implement 10 shown in FIGS. 17 (A) and 17 (B). .

  On the other hand, in the fifth embodiment, after the decorative member 70 (see FIG. 18B) is extrapolated to the smaller diameter refill 20 (see FIGS. 14A and 14B), Is inserted from the front end of the barrel 30. The rear end of the refill 20 passes through the outer cylinder 50 of the component 40, enters the inner cylinder 60, and is held in contact with the second contact 63 (see FIG. 18B). At this time, the decoration member 70 functions as a steady rest of the refill 20 by being sandwiched between the outer surface of the refill 20 and the inner surface of the barrel 30. In this state, the knock spring 27 is externally inserted at the tip of the refill 20, and then the tip shaft 30A is screwed onto the tip of the barrel 30, thereby obtaining the writing implement 10 shown in FIGS. 18A and 18B. .

<Summary of Fourth Embodiment and Fifth Embodiment>
As described above, the component 40 is used for the refill 20 (see FIGS. 2 (A) and 2 (B)) for storing the aqueous gel ink having a larger diameter and the refill 20 for storing the oil ink having a smaller diameter. (See FIGS. 14A and 14B). Therefore, at least two types of refills 20 can be mounted on the same barrel 30 on which the same component 40, the knock bar 38, the knock cover 39, and the tip shaft 30A are mounted. The backflow of the contents such as the ink 24 and the follower 25 stored in the ink storage tube 23 is as described in the first embodiment.

  The writing implement set 80 described in the third embodiment is provided with the barrel 30 (along with the component 40, the knock bar 38, the knock cover 39, and the tip shaft 30A) of the fourth and fifth embodiments in the third embodiment. Instead of or together with the barrel 30 in the embodiment, it may be included in the packaging 81.

  INDUSTRIAL APPLICATION This invention is applicable to writing implements, such as a ball-point pen, a felt-tip pen, and a marking pen.

DESCRIPTION OF SYMBOLS 10 Writing implement 20 Refill 21 Ballpoint pen tip 22 Joint 23 Ink accommodating tube 23A Ridge part 24 Ink 25 Follower 26 Resin ball 27 Knock spring 30 Shaft cylinder 30A Front shaft 31 Tapered part 32 Locking projection 33 Stepped recess 34 Female screw groove 35 Opening 36 Cap 37 Clip 38 Knock rod 39 Knock cover 40 Parts 41 Bottom part 42 Partition part 43 Vent part 44 Vent hole 45 Second storage part 46 Partition wall 47 First contact part 50 Outer cylinder part 51 Male screw groove 52 Fitting part 53 Convex Part 54 Front rib 60 Inner cylinder part 61 First storage part 62 Ventilation opening 63 Second contact part 64 Rear rib 65 Side rib 66 Cam tooth 67 Connection protrusion 68 Front end edge 70 Decoration member 71 Front part 72 Rear part 73 Vibration suppression protrusion Line 74 Front opening 75 Reduced diameter stepped portion 76 Rear opening 77 Inner rib 78 Locking ridge 80 Serial device set 81 packaging

Claims (8)

A refill containing ink,
A barrel containing the refill,
A writing tool that abuts on the rear end of the refill and has a component mounted on the rear end of the barrel.
The parts include:
A cylindrical outer tube,
An inner cylinder portion having a diameter smaller than that of the outer cylinder portion and the same axial center, and a front end edge located behind the front end edge of the outer cylinder portion;
A bottom portion closing the rear end side of the inner cylinder portion,
A first storage portion, which is a space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion, and stores the content when the content flows out from the rear end of the refill,
A plurality of partition portions that partition the space between the outer tube portion and the inner tube portion into a plurality of sections in a circumferential direction,
A partition wall that closes a portion on the rear end side from the front end of the inner cylindrical portion in at least a part of the plurality of sections,
In the section having the partition, a second storage portion that is a space on the tip side of the partition,
A notch provided in a portion of the front end edge of the inner cylindrical portion facing the second storage portion, and a ventilation port communicating the first storage portion and the second storage portion;
Is provided,
When the contents overflow from the first storage section, the contents can flow into the second storage section from the ventilation port and be stored therein. Writing implement. The component further includes a first abutting portion that is a front edge of the partition portion and a second abutting portion that is a stepped portion formed on the inner periphery of the inner cylindrical portion from a distal end side. Along with
The writing implement according to claim 1, wherein any one of a plurality of refills formed in different shapes can be incorporated in the barrel.   3. The writing implement according to claim 1, wherein a part of the plurality of partitions is a ventilation portion penetrating from a front end to a rear end without providing the partition. 4. The barrel is made of a material whose interior is visible,
The writing implement according to any one of claims 1 to 3, wherein a decorative member that holds an outer diameter of the refill on the distal end side is inserted inside the distal end side of the barrel. A plurality of refills containing ink, each having a different shape,
A shaft cylinder capable of incorporating any of the plurality of refills,
A writing instrument set comprising
At the rear end of the barrel, a part that comes into contact with the rear end of the refill when the refill is built in the barrel is mounted,
The parts include:
A cylindrical outer tube,
An inner cylinder portion having a diameter smaller than that of the outer cylinder portion and the same axial center, and a front end edge located behind the front end edge of the outer cylinder portion;
A bottom portion closing the rear end side of the inner cylinder portion,
A first storage portion, which is a space surrounded by the inner surface of the bottom portion and the inner peripheral surface of the inner cylindrical portion, and stores the content when the content flows out from the rear end of the refill,
A plurality of partition portions that partition the space between the outer tube portion and the inner tube portion into a plurality of sections in a circumferential direction,
A first contact portion which is a front edge of the partition portion,
A second contact portion, which is a step from the tip side formed on the inner periphery of the inner cylindrical portion,
A partition wall that closes a portion on the rear end side from the front end of the inner cylindrical portion in at least a part of the plurality of sections,
In the section having the partition, a second storage portion that is a space on the tip side of the partition,
A notch provided in a portion of the front end edge of the inner cylindrical portion facing the second storage portion, and a ventilation port communicating the first storage portion and the second storage portion;
Is provided,
When the contents overflow from the first storage section, the contents can flow into the second storage section from the ventilation port and be stored therein. Writing instrument set.   The writing instrument set according to claim 5, wherein a part of the plurality of sections is a ventilation section penetrating from a front end to a rear end without the partition. The barrel is made of a material whose interior is visible,
The writing instrument set according to claim 5, wherein a decorative member that holds an outer diameter of a tip side of the refill is inserted into a tip side of the barrel.   The writing implement set according to any one of claims 5 to 7, wherein the barrel is a barrel for a knock-type writing instrument having a knock button at a rear end.