JP2021035778A - Writing instrument - Google Patents
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- JP2021035778A JP2021035778A JP2020201368A JP2020201368A JP2021035778A JP 2021035778 A JP2021035778 A JP 2021035778A JP 2020201368 A JP2020201368 A JP 2020201368A JP 2020201368 A JP2020201368 A JP 2020201368A JP 2021035778 A JP2021035778 A JP 2021035778A
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Abstract
Description
本発明は、筆記具に関する。 The present invention relates to a writing instrument.
従来、ペン芯に対して大きな筆記荷重がかかった際にペン芯の折れや潰れを防ぐべく、ペン芯が前後に移動可能となるようペン芯の周囲にスプリングを取り付けた筆記具が提供されていた。
そして、上記筆記具は、ペン芯に対して大きな筆記荷重がかかるとスプリングの弾性作用によりペン芯が後方に移動するように形成されているため、ペン芯が折れたり潰れたりしないこととなっている。
このような技術として、下記の特許文献１、２及び３が開示されている。
Conventionally, in order to prevent the pen core from being broken or crushed when a large writing load is applied to the pen core, a writing tool in which a spring is attached around the pen core so that the pen core can be moved back and forth has been provided. ..
The writing instrument is formed so that the pen core moves backward due to the elastic action of the spring when a large writing load is applied to the pen core, so that the pen core does not break or collapse. ..
The following Patent Documents 1, 2 and 3 are disclosed as such techniques.
しかし、上記の特許文献１、２及び３に開示された技術は、ペン芯にインクを供給するためにはポンピング（ペン芯を数回紙に押し付けることによってインクをペン芯に出す）が必要であり、筆記を行うまでに使用者に作業を課すこととなる。
そこで、本発明は、ペン芯に対して大きな筆記荷重がかかった際のペン芯の折れや潰れを防ぐことが可能な筆記具を提供することを課題とする。
However, the techniques disclosed in Patent Documents 1, 2 and 3 above require pumping (the ink is discharged to the pen core by pressing the pen core against the paper several times) in order to supply the ink to the pen core. Yes, it will impose work on the user before writing.
Therefore, an object of the present invention is to provide a writing instrument capable of preventing the pen core from being broken or crushed when a large writing load is applied to the pen core.
上記課題を解決するために、本発明は、以下のような構成を備える。 In order to solve the above problems, the present invention has the following configurations.
（第１の発明）
本発明のうち第１の発明に係る筆記具1は、軸筒10と、前記軸筒10の内部に収容され、毛細管力によってインクを誘導可能なインク供給芯50と、前記インク供給芯50の外周を覆う芯周囲部材20とを備え、前記インク供給芯50及び前記芯周囲部材20の一部が前記軸筒10の先端から突出した筆記具1において、前記インク供給芯50の先端部分が前記芯周囲部材20の先端から突出しており、かつ、この突出している寸法が前記インク供給芯50の径の１００％以上であり、前記インク供給芯50が加圧により前記芯周囲部材20に対して相対的に没入を開始する際に該インク供給芯50に加わるセット荷重が１Ｎ以上７Ｎ以下に形成され、前記インク供給芯50と前記芯周囲部材20との軸方向の位置関係を相対的に変えることができる変位部材30を備えたことを特徴とする。
(First invention)
The writing tool 1 according to the first aspect of the present invention includes an ink supply core 50 housed inside the shaft cylinder 10 and the shaft cylinder 10 and capable of guiding ink by capillary force, and an outer circumference of the ink supply core 50. In a writing tool 1 having a core peripheral member 20 covering the ink supply core 50 and a part of the ink supply core 50 and a part of the core peripheral member 20 protruding from the tip of the barrel 10, the tip portion of the ink supply core 50 is around the core. It protrudes from the tip of the member 20, and the protruding dimension is 100% or more of the diameter of the ink supply core 50, and the ink supply core 50 is relative to the core peripheral member 20 by pressurization. The set load applied to the ink supply core 50 at the start of immersion in the ink supply core 50 is formed to be 1N or more and 7N or less, and the positional relationship between the ink supply core 50 and the core peripheral member 20 in the axial direction can be relatively changed. It is characterized by being provided with a displaceable member 30 that can be formed.
軸筒10とは、筆記具1の外部構造であり、後端は閉塞していて、先端は先細り形状を呈し、その先端面が開口している。また、軸筒10の内部にはインクが収容される。その方法は特に限定されるものではなく、軸筒10の内部に直接インクを収容するものであってもよいし、インクが充填されたインクリフィルを軸筒10の内部に収容するものであってもよい。
ここで、インク供給芯50の外周の少なくとも一部を後述する被覆部材51で覆うことで、インク供給芯50の剛性や耐摩耗性を向上させることができる。そして、この被覆部材51とは、たとえば、インク供給芯50の外周の少なくとも一部をコーティングしたものなどである。
The barrel 10 is an external structure of the writing tool 1, the rear end is closed, the tip has a tapered shape, and the tip surface thereof is open. Ink is stored inside the barrel 10. The method is not particularly limited, and the ink may be stored directly inside the barrel 10, or the ink-filled ink refill may be stored inside the barrel 10. May be good.
Here, by covering at least a part of the outer periphery of the ink supply core 50 with a covering member 51 described later, the rigidity and wear resistance of the ink supply core 50 can be improved. The covering member 51 is, for example, a member obtained by coating at least a part of the outer periphery of the ink supply core 50.
セット荷重とは、インク供給芯50が筆圧等の加圧により芯周囲部材20に対して相対的に没入を開始する際におけるインク供給芯50に加わる荷重を意味する。
変位部材30は、インク供給芯50と芯周囲部材20との位置関係を相対的に変化させることを可能とする手段である。また、変位部材30には、インク供給芯50を芯周囲部材20に対して移動可能に形成してインク供給芯50が変位する場合と、芯周囲部材20をインク供給芯50に対し移動可能に形成して芯周囲部材20が変位する場合の双方を含む。なお、インク供給芯50の外周部分と芯周囲部材20の先端縁との間の距離は、最大０．０５ｍｍとすることが望ましい。
なお、インク供給芯50が加圧により芯周囲部材20に対して相対的に没入を開始するということは、当該加圧により生じる前記セット荷重がインク供給芯50に加わることで、該インク供給芯50が後退を開始することと、該芯周囲部材20が前進を開始することとの、両方を含む。
The set load means a load applied to the ink supply core 50 when the ink supply core 50 starts to immerse in the core peripheral member 20 relative to the core peripheral member 20 due to a pressure such as writing pressure.
The displacement member 30 is a means that makes it possible to relatively change the positional relationship between the ink supply core 50 and the core peripheral member 20. Further, in the displacement member 30, the ink supply core 50 is formed so as to be movable with respect to the core peripheral member 20, and the ink supply core 50 is displaced, and the core peripheral member 20 is movable with respect to the ink supply core 50. This includes both cases where the core peripheral member 20 is formed and displaced. The maximum distance between the outer peripheral portion of the ink supply core 50 and the tip edge of the core peripheral member 20 is preferably 0.05 mm.
The fact that the ink supply core 50 starts immersing relative to the core peripheral member 20 by pressurization means that the set load generated by the pressurization is applied to the ink supply core 50, so that the ink supply core 50 This includes both the 50 starting the retreat and the core peripheral member 20 starting the forward movement.
（第２の発明）
本発明のうち第２の発明は、前記した第１の発明の特徴に加え、前記変位部材30は、前記芯周囲部材20の後方に配置される弾性部材33を備え、前記弾性部材33が引張又は圧縮されることで、前記インク供給芯50と前記芯周囲部材20との位置関係を相対的に変えることができるものであり、前記インク供給芯50の前記芯周囲部材20からの突出部分を初期位置として、前記インク供給芯50の先端に荷重を加え前記弾性部材33が引張又は圧縮されることで、前記インク供給芯50が前記芯周囲部材20に対して相対的に後方へ移動することができるように形成されていることを特徴とする。
(Second invention)
In the second invention of the present invention, in addition to the features of the first invention described above, the displacement member 30 includes an elastic member 33 arranged behind the core peripheral member 20, and the elastic member 33 is tensioned. Alternatively, by being compressed, the positional relationship between the ink supply core 50 and the core peripheral member 20 can be relatively changed, and the protruding portion of the ink supply core 50 from the core peripheral member 20 can be formed. As an initial position, the ink supply core 50 moves rearward relative to the core peripheral member 20 by applying a load to the tip of the ink supply core 50 and pulling or compressing the elastic member 33. It is characterized in that it is formed so that it can be formed.
本発明は、前記第１の発明における変位部材30を特定したものである。すなわち、本発明における変位部材30が備える弾性部材33は、ゴムやスプリング等の弾性を有する素材から形成され、弾性部材33が有する弾性作用によって引張又は圧縮された形状を初期の形状に復元することができるものである。
この弾性部材33は、自己の弾性作用に伴って、インク供給芯50と芯周囲部材20との相対的な位置関係を、インク供給芯50を芯周囲部材20に対し相対的に後方へ移動させた位置（以下、没入位置とする。）と、芯周囲部材20の先端からインク供給芯50を突出させた位置（以下、突出位置とする。）とに変化させることができる。
The present invention specifies the displacement member 30 in the first invention. That is, the elastic member 33 included in the displacement member 30 in the present invention is formed of an elastic material such as rubber or a spring, and the shape tensioned or compressed by the elastic action of the elastic member 33 is restored to the initial shape. Can be done.
The elastic member 33 causes the ink supply core 50 to move the ink supply core 50 relatively rearward with respect to the core peripheral member 20 in relation to the relative positional relationship between the ink supply core 50 and the core peripheral member 20 due to its own elastic action. It can be changed to a vertical position (hereinafter referred to as an immersion position) and a position in which the ink supply core 50 protrudes from the tip of the core peripheral member 20 (hereinafter referred to as a protruding position).
（第３の発明）
本発明のうち第３の発明は、前記した第１、第２の発明の特徴に加え、前記インク供給芯50の内部には、毛細管力が発生する間隙を有したインク供給空間が形成され、前記インク供給空間の毛細管力によりインクを誘導することを特徴とする。
本発明は、前記第１、第２の発明におけるインク供給芯50において、毛細管力の発生箇所を特定したものである。
第３の発明におけるインク供給空間は、インク供給芯50を押出成形によって形成する際に、内部に微細に管理された通路を残すことで、その通路を用いてインクを誘導するというものである。
(Third invention)
In the third invention of the present invention, in addition to the features of the first and second inventions described above, an ink supply space having a gap for generating capillary force is formed inside the ink supply core 50. It is characterized in that ink is induced by the capillary force of the ink supply space.
In the present invention, the location where the capillary force is generated is specified in the ink supply core 50 in the first and second inventions.
The ink supply space in the third invention is to guide ink using the passage by leaving a finely controlled passage inside when the ink supply core 50 is formed by extrusion molding.
（第４の発明）
本発明のうち第４の発明は、前記した第１、第２の発明の特徴に加え、前記インク供給芯50の外部には、毛細管力が発生する間隙を有したインク供給空間が形成され、前記インク供給空間の毛細管力によりインクを誘導することを特徴とする。
本発明は、前記第１、第２の発明におけるインク供給芯50において、毛細管力の発生箇所を特定したものである。
第４の発明におけるインク供給空間は、インク供給芯50を押出成形によって形成する際に、外部に微細に管理された通路を残すことで、その通路を用いてインクを誘導するというものである。
(Fourth invention)
In the fourth aspect of the present invention, in addition to the features of the first and second inventions described above, an ink supply space having a gap for generating capillary force is formed outside the ink supply core 50. It is characterized in that ink is induced by the capillary force of the ink supply space.
In the present invention, the location where the capillary force is generated is specified in the ink supply core 50 in the first and second inventions.
The ink supply space in the fourth invention is to guide ink using the passage by leaving a finely controlled passage to the outside when the ink supply core 50 is formed by extrusion molding.
本発明は、以上のように構成されているので、以下の作用効果を奏する。
本発明に係る筆記具は、変位部材によりインク供給芯と芯周囲部材との相対的な位置関係を変化させることができる。そのため、インク供給芯が突出位置にある場合には、インク供給芯のみ筆記面に接触させることができるため、インク供給芯が保持しているインクによって描線を描くことができる。
一方、インク供給芯に対して大きな筆記荷重がかかり、インク供給芯が没入位置に移動した場合には、インク供給芯の代わりに芯周囲部材が筆記荷重を受けることとなるため、インク供給芯の折れや潰れを防ぐことができる。そのため、本発明は、特にインク供給芯の外径が１．０ｍｍ以下の細い描線を描く筆記具に適している。
Since the present invention is configured as described above, it exhibits the following effects.
In the writing tool according to the present invention, the relative positional relationship between the ink supply core and the core peripheral member can be changed by the displacement member. Therefore, when the ink supply core is in the protruding position, only the ink supply core can be brought into contact with the writing surface, so that the drawing line can be drawn by the ink held by the ink supply core.
On the other hand, when a large writing load is applied to the ink supply core and the ink supply core moves to the immersion position, the core peripheral member receives the writing load instead of the ink supply core. It can prevent breakage and crushing. Therefore, the present invention is particularly suitable for a writing tool that draws thin lines with an outer diameter of an ink supply core of 1.0 mm or less.
また、変位部材が弾性部材を備える場合には、以下の作用効果を奏する。
弾性部材は、インク供給芯に対して大きな筆記荷重がかかるとその弾性作用に伴って、インク供給芯を没入位置に移動させることができる。一方、弾性部材は、インク供給芯への筆記荷重が減少すると弾性作用により初期の形状に戻り、それに伴ってインク供給芯を突出位置へ移動させることができる。
Further, when the displacement member includes an elastic member, the following effects are obtained.
When a large writing load is applied to the ink supply core, the elastic member can move the ink supply core to the immersion position due to the elastic action thereof. On the other hand, when the writing load on the ink supply core is reduced, the elastic member returns to its initial shape due to the elastic action, and the ink supply core can be moved to the protruding position accordingly.
さらに、上記の構成によれば、弾性作用による弾性部材の変形に伴う内容積の変化を利用して、インク供給空間を筆記荷重によって加圧状態とすることができる結果、初筆時のインク流出量を良好にすることができる。 Further, according to the above configuration, the ink supply space can be pressurized by the writing load by utilizing the change in the internal volume due to the deformation of the elastic member due to the elastic action, and as a result, the ink flows out at the time of the first writing. The amount can be good.
以下、図面を参照しつつ、本実施の形態に係る筆記具1として、軸筒10の先端に筆記先端としてのインク供給芯50を備えた筆記具1を例に説明する。なお、本発明において、筆記具1及びその構成部品についての「前方」及び「先端」とはインク供給芯50を備えた方向を示し、「後方」及び「後端」とはその反対側の方向を示すものとする。 Hereinafter, as the writing tool 1 according to the present embodiment, a writing tool 1 having an ink supply core 50 as a writing tip at the tip of the barrel 10 will be described as an example with reference to the drawings. In the present invention, the "front" and "tip" of the writing tool 1 and its components indicate the direction in which the ink supply core 50 is provided, and the directions opposite to the "rear" and "rear end". It shall be shown.
（第１の実施の形態）
（全体構成）
第１の実施の形態に係る筆記具1は、図１（Ａ）に示すように、先軸11及び後軸12を備えた軸筒10と、先軸11の前方側に固定された芯周囲部材20とを備えた外観を呈している。また、軸筒10の内部には、図１（Ｂ）に示すように先軸11の前方側から芯周囲部材20の先端にかけて筆記先端としてのインク供給芯50が収容されている。なお、図２（Ａ）は、没入位置における筆記具1の外観を示した正面図であり、インク供給芯50の芯周囲部材20からの突出している寸法が図１（Ａ）と比べて小さくなっている以外は、図１（Ａ）と同様の構成となっている。また、図２（Ｂ）についても、インク供給芯50の芯周囲部材20からの突出している寸法が図１（Ｂ）と比べて小さくなっている以外は、図１（Ｂ）と同様の構成となっている。
(First Embodiment)
(overall structure)
As shown in FIG. 1A, the writing tool 1 according to the first embodiment includes a barrel 10 having a front shaft 11 and a rear shaft 12, and a core peripheral member fixed to the front side of the front shaft 11. It has an appearance with 20 and. Further, as shown in FIG. 1B, an ink supply core 50 as a writing tip is housed inside the barrel 10 from the front side of the front shaft 11 to the tip of the core peripheral member 20. Note that FIG. 2A is a front view showing the appearance of the writing tool 1 at the immersion position, and the dimension of the ink supply core 50 protruding from the core peripheral member 20 is smaller than that of FIG. 1A. The configuration is the same as that of FIG. 1 (A) except that. Further, FIG. 2 (B) has the same configuration as that of FIG. 1 (B) except that the dimension of the ink supply core 50 protruding from the core peripheral member 20 is smaller than that of FIG. 1 (B). It has become.
（軸筒10）
本実施の形態に係る筆記具1の構造は、図１（Ｂ）に示すように、後端が閉鎖された筒形状のインクタンク13と、先端が先細り形状を呈している筒形状の先軸11と、後端を閉鎖された筒形状の後軸12とからなる。先軸11の後端の内周には、インクタンク13の先端が嵌入している。後軸12の先端の内周には先軸11の後端が嵌入している。
(Cylinder 10)
As shown in FIG. 1B, the structure of the writing tool 1 according to the present embodiment includes a tubular ink tank 13 having a closed rear end and a tubular tip shaft 11 having a tapered tip. And a tubular rear shaft 12 with a closed rear end. The tip of the ink tank 13 is fitted in the inner circumference of the rear end of the front shaft 11. The rear end of the front shaft 11 is fitted into the inner circumference of the tip of the rear shaft 12.
（先軸11）
図１（Ｂ）に示すように、先軸11は、略筒状でその先端は先細り形状を呈している。先軸11の外周には、先軸11の後端から先軸11の全長の約１／４の距離を隔てた位置に先軸鍔部15が設けられている。先軸鍔部15の外径は後軸12の外径と略同径であり、後軸12の先端が当接している。また、先軸11は、先軸鍔部15を境にして、略円筒状を呈した後方側の先軸後部14と、先細り形状を呈した前方側の先軸前部16とを備える。
(Front axis 11)
As shown in FIG. 1 (B), the tip shaft 11 has a substantially tubular shape and its tip has a tapered shape. A front shaft flange portion 15 is provided on the outer periphery of the front shaft 11 at a position separated from the rear end of the front shaft 11 by a distance of about 1/4 of the total length of the front shaft 11. The outer diameter of the front shaft flange portion 15 is substantially the same as the outer diameter of the rear shaft 12, and the tip of the rear shaft 12 is in contact with the outer diameter. Further, the front shaft 11 includes a front shaft rear portion 14 on the rear side having a substantially cylindrical shape and a front shaft front portion 16 on the front side having a tapered shape with the front shaft flange portion 15 as a boundary.
図３（Ａ）に示すように、先軸前部16の先端部分には、段部をもって縮径し、後述する変位部材30の先端が貫通する先軸前部縮径孔16aと、再び段部をもって縮径し、先軸前部縮径孔16aの前方に連設している芯周囲部材挿入孔16bとが設けられている。芯周囲部材挿入孔16bには芯周囲部材20が挿入される。なお、先軸前部16の先端近傍の外周には、比較的幅広の溝が設けられており、滑り止めとなるグリップ部材17が装着されている。 As shown in FIG. 3A, the tip portion of the front shaft front portion 16 has a stepped portion to reduce the diameter, and the tip shaft front portion reduced diameter hole 16a through which the tip of the displacement member 30 described later penetrates and the stepped portion again. The diameter is reduced by the portion, and a core peripheral member insertion hole 16b is provided in front of the front shaft front diameter reduction hole 16a. The core peripheral member 20 is inserted into the core peripheral member insertion hole 16b. A relatively wide groove is provided on the outer circumference near the tip of the front shaft front portion 16, and a grip member 17 for preventing slipping is attached.
（コレクター40）
図１（Ｂ）に示すように、先軸前部16の内部には、ＡＢＳ樹脂製のコレクター40が圧入されている。コレクター40には、複数枚の板状部材が軸方向に平行に配され、この板状部材間に図示しないインクが保留可能となっている。さらに、そのコレクター40の軸心には、繊維束体により形成されたコレクター芯41が貫装されている。また、コレクター40の前方には変位部材30が装着される。
(Collector 40)
As shown in FIG. 1 (B), a collector 40 made of ABS resin is press-fitted into the front shaft front portion 16. A plurality of plate-shaped members are arranged in parallel in the axial direction in the collector 40, and ink (not shown) can be held between the plate-shaped members. Further, a collector core 41 formed of a fiber bundle is pierced at the axis of the collector 40. Further, a displacement member 30 is mounted in front of the collector 40.
（変位部材30）
図５（Ａ）に示すように、変位部材30は、略筒状の中心部材31と、中心部材31の中間より後方寄りの外周においてコレクター40の先端の厚さ分の空隙部34を隔てて成形された略筒状の周辺部材32と、周辺部材32の先端から、中心部材31の中間より前方寄りの位置までを覆うように形成された弾性部材33とからなる。
(Displacement member 30)
As shown in FIG. 5A, the displacement member 30 is separated from the substantially tubular center member 31 by a gap 34 corresponding to the thickness of the tip of the collector 40 on the outer circumference closer to the rear than the middle of the center member 31. It is composed of a formed substantially tubular peripheral member 32 and an elastic member 33 formed so as to cover from the tip of the peripheral member 32 to a position closer to the front than the middle of the central member 31.
（中心部材31）
図３（Ａ）に示すように、中心部材31の内部には、後方からコレクター芯41が挿入され、前方からインク供給芯50が挿入される。インク供給芯50の後端はコレクター芯41の先端へ刺設されている。
図５（Ｃ）に示すように、中心部材31の内周には、コレクター芯41と略同径の後方挿入孔31aが中心部材31の後端から中間より先端寄りの位置にかけて設けられ、インク供給芯50と略同径の前方挿入孔31cがその前方に設けられている。
(Center member 31)
As shown in FIG. 3A, the collector core 41 is inserted from the rear and the ink supply core 50 is inserted from the front inside the central member 31. The rear end of the ink supply core 50 is inserted into the tip of the collector core 41.
As shown in FIG. 5C, a rear insertion hole 31a having substantially the same diameter as the collector core 41 is provided on the inner circumference of the central member 31 from the rear end of the central member 31 to a position closer to the tip than the middle. A front insertion hole 31c having substantially the same diameter as the supply core 50 is provided in front of the feeding core 50.
また、中心部材31の外周の中間付近に円環状の中心部材鍔部31eが形成されている。さらに、中心部材31は、後端から中心部材鍔部31eまでの後方円柱部後部31dと、中心部材鍔部31eから後方挿入孔31aの先端よりも後端寄りの箇所までに位置する後方円柱部前部31fと、後方円柱部前部31fの先端から後方挿入孔31aの先端のやや前方までに位置する中間円柱部31gと、中間円柱部31gの先端から中心部材31の先端までに位置する前方円柱部31hとからなる。なお、変位部材30にインク供給芯50を装着した状態で、前方円柱部31hの中間辺りに外周から内側にポンチ加工を施して内方突起35が形成される（図３参照）。この内方突起35は、インク供給を阻害しない程度の力でインク供給芯50を押圧することで、中心部材31とインク供給芯50とを固定している。そして、中心部材31とインク供給芯50とが固定されているため、インク供給芯50の動きに伴い、変位部材30の中心部材31がともに移動することとなっている。 Further, an annular central member flange portion 31e is formed near the middle of the outer circumference of the central member 31. Further, the central member 31 includes a rear cylindrical portion 31d from the rear end to the central member flange portion 31e and a rear cylindrical portion located from the central member flange portion 31e to a portion closer to the rear end than the tip of the rear insertion hole 31a. The front portion 31f, the intermediate cylinder portion 31g located slightly forward from the tip of the rear cylinder portion front portion 31f to the tip of the rear insertion hole 31a, and the front portion located from the tip of the intermediate cylinder portion 31g to the tip of the central member 31. It consists of a cylindrical portion 31h. With the ink supply core 50 attached to the displacement member 30, an inward protrusion 35 is formed by punching from the outer circumference to the inside in the middle of the front cylindrical portion 31h (see FIG. 3). The inward protrusion 35 fixes the central member 31 and the ink supply core 50 by pressing the ink supply core 50 with a force that does not interfere with the ink supply. Since the central member 31 and the ink supply core 50 are fixed, the central member 31 of the displacement member 30 moves together with the movement of the ink supply core 50.
ここで、後方円柱部後部31d及び後方円柱部前部31fの外径は、コレクター40の先端部の内径と略同径であり、中間円柱部31gの外径は、後方円柱部前部31fの外径よりやや小径である。さらに、前方円柱部31hの外径は、図３（Ａ）に示す芯周囲部材20の後方側に設けられた後部挿入孔24の径と略同径である。 Here, the outer diameters of the rear cylindrical portion 31d and the rear cylindrical portion front portion 31f are substantially the same as the inner diameter of the tip portion of the collector 40, and the outer diameter of the intermediate cylindrical portion 31g is that of the rear cylindrical portion front portion 31f. The diameter is slightly smaller than the outer diameter. Further, the outer diameter of the front cylindrical portion 31h is substantially the same as the diameter of the rear insertion hole 24 provided on the rear side of the core peripheral member 20 shown in FIG. 3A.
（周辺部材32）
図５に示す、周辺部材32の内径は、コレクター40の先端部の外径と略同径である。また、図５（Ｃ）に示すように、周辺部材32の内周面32aの中間より後端寄りの箇所に、円環状に形成された周辺部材内方突起32bが設けられている。なお、周辺部材内方突起32bは、コレクター40の先端部を周辺部材32と中心部材31とで挟持すべく設けられている。
(Peripheral member 32)
The inner diameter of the peripheral member 32 shown in FIG. 5 is substantially the same as the outer diameter of the tip portion of the collector 40. Further, as shown in FIG. 5C, a peripheral member inward protrusion 32b formed in an annular shape is provided at a position closer to the rear end than the middle of the inner peripheral surface 32a of the peripheral member 32. The peripheral member inward protrusion 32b is provided so as to sandwich the tip of the collector 40 between the peripheral member 32 and the central member 31.
また、周辺部材32の外周は、その後端から周辺部材内方突起32bまでの間に位置する周辺部材後方外周部32cと、周辺部材後方外周部32cに連設し外径が縮小している周辺部材中間外周部32dと、周辺部材中間外周部32dに連設し、周辺部材32の先端までに位置し外径が縮小している周辺部材前方外周部32eとからなる。
周辺部材前方外周部32eの先端付近には、円環状の周辺部材外方突部32fが設けられている。
Further, the outer circumference of the peripheral member 32 is a peripheral portion whose outer diameter is reduced by being connected to the peripheral member rear outer peripheral portion 32c located between the rear end and the peripheral member inward protrusion 32b and the peripheral member rear outer peripheral portion 32c. It is composed of a peripheral member intermediate outer peripheral portion 32d and a peripheral member front outer peripheral portion 32e which is connected to the peripheral member intermediate outer peripheral portion 32d and is located up to the tip of the peripheral member 32 and whose outer diameter is reduced.
An annular peripheral member outer protrusion 32f is provided near the tip of the peripheral member front outer peripheral portion 32e.
（弾性部材33）
図５（Ｃ）に示すように、弾性部材33は、周辺部材32の周辺部材前方外周部32eを覆い、その外径が周辺部材中間外周部32dの径と略同径であって略円筒状を呈する弾性部材後方円柱部33aと、弾性部材後方円柱部33aに連設し、中心部材鍔部31eの後方寄りの位置までを覆い、段階的に蛇腹状に縮径する連結部33bと、連結部33bに連設し、中間円柱部31gの後方側部分までを覆い、なだらかな先細な円錐形状を呈する弾性部材前方円錐部33cとからなる。
(Elastic member 33)
As shown in FIG. 5C, the elastic member 33 covers the peripheral member front outer peripheral portion 32e of the peripheral member 32, and its outer diameter is substantially the same as the diameter of the peripheral member intermediate outer peripheral portion 32d and is substantially cylindrical. It is connected to the elastic member rear columnar portion 33a and the elastic member rear columnar portion 33a, which are connected to the connecting portion 33b which covers up to the position closer to the rear of the central member flange portion 31e and gradually reduces the diameter in a bellows shape. It is connected to the portion 33b, covers up to the rear side portion of the intermediate cylindrical portion 31g, and is composed of an elastic member front conical portion 33c having a gently tapered conical shape.
弾性部材後方円柱部33aは、周辺部材前方外周部32eの後端から周辺部材前方外周部32eの先端までを覆い、その結果として周辺部材外方突部32fと係合している。
ここで、弾性部材33の内周は、中心部材31及び周辺部材32の外周に密着するように形成され、連結部33bの後端側の内径は、周辺部材32の内径と同一である。また、連結部33bの前方側の内径は段階的に縮径している。
The elastic member rear cylindrical portion 33a covers from the rear end of the peripheral member front outer peripheral portion 32e to the tip of the peripheral member front outer peripheral portion 32e, and as a result, is engaged with the peripheral member outer protrusion 32f.
Here, the inner circumference of the elastic member 33 is formed so as to be in close contact with the outer circumferences of the central member 31 and the peripheral member 32, and the inner diameter on the rear end side of the connecting portion 33b is the same as the inner diameter of the peripheral member 32. Further, the inner diameter of the connecting portion 33b on the front side is gradually reduced.
（二色成形）
変位部材30は、二色成形により成形された部品であり、中心部材31及び周辺部材32を一次成形で成形し、これら中心部材31及び周辺部材32に対し弾性部材33を二次成形により一体成形している。弾性部材33は、連結部33bにおいて、撓りをもたせるため、弾性樹脂材料によって形成される。
また、弾性樹脂材料としては、成型工程において、金型を用いて、高温下で行うため熱可塑性エラストマーが望ましい。なお、一次成形体である中心部材31及び周辺部材32の材質は、弾性部材33より剛性の高いＰＢＴ樹脂等の硬質樹脂が望ましい。
(Two-color molding)
The displacement member 30 is a part formed by two-color molding. The central member 31 and the peripheral member 32 are formed by primary molding, and the elastic member 33 is integrally formed with the central member 31 and peripheral member 32 by secondary molding. doing. The elastic member 33 is formed of an elastic resin material in order to have flexibility at the connecting portion 33b.
Further, as the elastic resin material, a thermoplastic elastomer is desirable because it is carried out at a high temperature by using a mold in the molding process. The material of the central member 31 and the peripheral member 32, which are the primary molded bodies, is preferably a hard resin such as PBT resin having a higher rigidity than the elastic member 33.
（変位部材30の撓みの説明）
以下、図３を用いて、インク供給芯50に対して大きな筆記荷重がかかった際に突出位置から没入位置へと移動する過程について説明する。
上述のように、本実施の形態における変位部材30は弾性部材33が弾性樹脂材料により形成されているため、インク供給芯50に対して大きな筆記荷重がかかった際に弾性部材33が弾性変形することで撓みが生ずる。
(Explanation of deflection of displacement member 30)
Hereinafter, with reference to FIG. 3, a process of moving from the protruding position to the immersion position when a large writing load is applied to the ink supply core 50 will be described.
As described above, since the elastic member 33 of the displacement member 30 in the present embodiment is made of an elastic resin material, the elastic member 33 is elastically deformed when a large writing load is applied to the ink supply core 50. This causes bending.
具体的には、大きな筆記荷重、すなわち、インク供給芯50が加圧により後退を開始する際にインク供給芯50に加わるセット荷重が本実施の形態においては１Ｎから７Ｎの間で設定されており、このセット荷重よりも大きな荷重がかかると、弾性部材33が弾性変形して撓みが生ずる。本実施の形態においてセット荷重を１Ｎ以上で設定した理由としては、１Ｎよりも小さいと、多少の筆記荷重でインク供給芯50が後方に移動してしまい、インク供給芯50ががたついて筆感が悪くなるからである。一方、本実施の形態においてセット荷重を７Ｎ以下で設定した理由としては、７Ｎよりも大きいと、多少の筆記荷重ではインク供給芯50が後方に移動しないため、インク供給芯50がその全ての筆記荷重を受ける結果、インク供給芯50が折れたり潰れたりしてしまうからである。 Specifically, a large writing load, that is, a set load applied to the ink supply core 50 when the ink supply core 50 starts to retreat due to pressurization is set between 1N and 7N in this embodiment. When a load larger than this set load is applied, the elastic member 33 elastically deforms and bends. The reason why the set load is set to 1N or more in this embodiment is that if it is smaller than 1N, the ink supply core 50 moves backward with a slight writing load, and the ink supply core 50 rattles and feels like writing. Because it gets worse. On the other hand, the reason why the set load is set to 7N or less in this embodiment is that if the set load is larger than 7N, the ink supply core 50 does not move backward with a slight writing load, so that the ink supply core 50 is used for all writing. This is because the ink supply core 50 is broken or crushed as a result of receiving the load.
図３（Ａ）は、筆記具1の突出位置を示した拡大断面図であるが、セット荷重よりも大きな荷重がかかった場合には、図３（Ｂ）に示すように、弾性部材33が弾性変形して撓みが生ずることに伴いインク供給芯50も後方に移動して、筆記具1が突出位置から没入位置へ移動する。 FIG. 3A is an enlarged cross-sectional view showing the protruding position of the writing tool 1, but when a load larger than the set load is applied, the elastic member 33 is elastic as shown in FIG. 3B. As the ink supply core 50 is deformed and bent, the ink supply core 50 also moves backward, and the writing tool 1 moves from the protruding position to the immersion position.
（芯周囲部材20）
図３（Ａ）に示すように、芯周囲部材20は、円筒状の芯周囲部材固定部21と、芯周囲部材固定部21に対し段部をもって一旦拡径して連設する略円錐形状の芯周囲部材テーパー部22とからなる。芯周囲部材テーパー部22の先端には、面取りされた芯周囲部材先端部23が設けられている。ここで、本実施の形態における芯周囲部材20はポリアセタールで形成されている。
また、芯周囲部材20には、その後端から先端にかけて孔が貫通している。具体的には、芯周囲部材固定部21から芯周囲部材テーパー部22への段部を超えた箇所までの内周が後部挿入孔24であり、その先の芯周囲部材テーパー部22の内周が、段階的に縮径した前部挿入孔25である。
(Core peripheral member 20)
As shown in FIG. 3A, the core peripheral member 20 has a substantially conical shape in which the cylindrical core peripheral member fixing portion 21 and the core peripheral member fixing portion 21 are once expanded in diameter with a step portion and continuously provided. It is composed of a core peripheral member taper portion 22. A chamfered core peripheral member tip portion 23 is provided at the tip of the core peripheral member tapered portion 22. Here, the core peripheral member 20 in the present embodiment is made of polyacetal.
Further, the core peripheral member 20 has a hole penetrating from the rear end to the tip. Specifically, the inner circumference from the core peripheral member fixing portion 21 to the portion beyond the step portion to the core peripheral member tapered portion 22 is the rear insertion hole 24, and the inner circumference of the core peripheral member tapered portion 22 beyond that is the rear insertion hole 24. However, there is a front insertion hole 25 whose diameter is gradually reduced.
ここで、芯周囲部材固定部21は、芯周囲部材挿入孔16bに装着されることで、先軸11に固定される。そして、芯周囲部材20はインク供給芯50及び後述する被覆部材51を被覆する。この際、後部挿入孔24に変位部材30の前方円柱部31h（図５（Ｂ）、（Ｃ）参照）が挿入され、前部挿入孔25には、変位部材30から突出するインク供給芯50が挿入される。 Here, the core peripheral member fixing portion 21 is fixed to the toe shaft 11 by being mounted in the core peripheral member insertion hole 16b. Then, the core peripheral member 20 covers the ink supply core 50 and the covering member 51 described later. At this time, the front cylindrical portion 31h (see FIGS. 5B and 5C) of the displacement member 30 is inserted into the rear insertion hole 24, and the ink supply core 50 protruding from the displacement member 30 is inserted into the front insertion hole 25. Is inserted.
（インク供給芯50）
図４（Ａ）に示すインク供給芯50は、ポリアセタール等の樹脂素材を押出成形することにより形成される。押出成形時には、毛細管現象によりインク供給芯50の先端までインクを誘導するための通路、すなわちインク供給空間が形成されている。また、図４（Ｂ）に示すように、インク供給芯50の外周は、被覆部材51により覆われている。なお、被覆部材51とは、インク供給芯50の外周を覆うものであればよく、本実施の形態のように独立した筒状の樹脂製の部材であってもよいし、インク供給芯50の外周を樹脂などでコーティングしたものであってもよい。そして、インク供給芯50は被覆部材51によってその外周を覆われていることから、変位部材30への挿入の際にインク供給芯50の外周が他の部材に引っかかりにくくなるため、変位部材30への挿入が容易となり、かつ、インク供給芯50の強度を保つことができる。なお、インク供給芯50は、天然繊維、獣毛繊維、ポリアセタール系樹脂、ポリエチレン系樹脂、アクリル系樹脂、ポリエステル系樹脂、ポリアミド系樹脂、ポリウレタン系樹脂、ポリオレフィン系樹脂、ポリビニル系樹脂、ポリカーボネート系樹脂、ポリエーテル系樹脂、ポリフェニレン系樹脂などの１種若しくは２種以上の組み合わせからなる並行繊維束やフェルト等の繊維束を加工若しくはこれらの繊維束を樹脂加工した繊維芯、又は、各種のプラスチック粉末などを焼結したポーラス体（焼結芯）としてもよい。
(Ink supply core 50)
The ink supply core 50 shown in FIG. 4A is formed by extrusion molding a resin material such as polyacetal. At the time of extrusion molding, a passage for guiding the ink to the tip of the ink supply core 50, that is, an ink supply space is formed by the capillary phenomenon. Further, as shown in FIG. 4B, the outer circumference of the ink supply core 50 is covered with the covering member 51. The covering member 51 may be an independent tubular resin member as in the present embodiment, as long as it covers the outer circumference of the ink supply core 50, or the ink supply core 50. The outer circumference may be coated with resin or the like. Since the outer circumference of the ink supply core 50 is covered by the covering member 51, the outer circumference of the ink supply core 50 is less likely to be caught by other members when the ink supply core 50 is inserted into the displacement member 30, so that the ink supply core 50 is moved to the displacement member 30. Can be easily inserted and the strength of the ink supply core 50 can be maintained. The ink supply core 50 includes natural fiber, animal hair fiber, polyacetal resin, polyethylene resin, acrylic resin, polyester resin, polyamide resin, polyurethane resin, polyolefin resin, polyvinyl resin, and polycarbonate resin. , Polyether-based resin, polyphenylene-based resin, and other parallel fiber bundles made of one or more combinations, processed fiber bundles such as felt, or resin-processed fiber cores, or various plastic powders. A porous body (sintered core) obtained by sintering the above may be used.
なお、上記のインク供給空間は、押出成形時に、インク供給芯50の内部に毛細管力が発生する間隙を形成することも、インク供給芯50の外部に毛細管力が発生する間隙を形成することも可能である。
ここで、本実施の形態においては、インク供給芯50の外周部分と芯周囲部材先端部23との間の距離は、最大０．０５ｍｍとなるように形成されている。このように、インク供給芯50の外周部分と芯周囲部材先端部23との間の距離を極力少なくすることで、インク供給芯50に斜め方向から筆記荷重がかかった場合であってもインク供給芯50の後方への移動を容易に行うことができることとなる。
The ink supply space may form a gap in which the capillary force is generated inside the ink supply core 50 or a gap in which the capillary force is generated outside the ink supply core 50 during extrusion molding. It is possible.
Here, in the present embodiment, the distance between the outer peripheral portion of the ink supply core 50 and the tip portion 23 of the core peripheral member is formed so as to be a maximum of 0.05 mm. In this way, by minimizing the distance between the outer peripheral portion of the ink supply core 50 and the tip portion 23 of the core peripheral member, ink is supplied even when a writing load is applied to the ink supply core 50 from an oblique direction. The core 50 can be easily moved to the rear.
また、本実施の形態においては、突出位置におけるインク供給芯50の先端部分が芯周囲部材先端部23から突出している寸法がインク供給芯50の径の１００％以上となるように形成されている。すなわち、図３（Ａ）では、インク供給芯50の先端部分が芯周囲部材先端部23から突出している寸法がインク供給芯50の径よりも長くなっている。具体的には、本実施の形態におけるインク供給芯50の径は０．８ｍｍであるため、突出位置におけるインク供給芯50の先端部分が芯周囲部材先端部23から突出している寸法は、０．８ｍｍ以上であればよい。なお、この突出位置におけるインク供給芯50の先端部分が芯周囲部材先端部23から突出している寸法は、１．３ｍｍ以上であることが望ましい。 Further, in the present embodiment, the tip portion of the ink supply core 50 at the protruding position is formed so that the dimension protruding from the tip portion 23 of the core peripheral member is 100% or more of the diameter of the ink supply core 50. .. That is, in FIG. 3A, the dimension in which the tip portion of the ink supply core 50 projects from the tip portion 23 of the core peripheral member is longer than the diameter of the ink supply core 50. Specifically, since the diameter of the ink supply core 50 in the present embodiment is 0.8 mm, the dimension in which the tip portion of the ink supply core 50 at the protruding position protrudes from the tip portion 23 of the core peripheral member is 0. It may be 8 mm or more. It is desirable that the tip portion of the ink supply core 50 at this protruding position protrudes from the tip portion 23 of the core peripheral member member to be 1.3 mm or more.
（筆記具1の特性）
本実施の形態に係る筆記具1は、変位部材30が３部材からなっており、その特性として周辺部材32と中心部材31とが、同一の一次成形体でありながら、互いに一次成形体としては連続していないため、弾性部材33の連結部33b付近が変形し、変位部材30が撓りやすい構造となっている。
そのため、図３（Ｂ）に示すように、筆記圧によって変位部材30を撓ませることでインク供給芯50と芯周囲部材20との相対的な位置関係が変位し、インク供給芯50を没入位置へと移動させることができる。
(Characteristics of writing tool 1)
In the writing tool 1 according to the present embodiment, the displacement member 30 is composed of three members, and as a characteristic thereof, the peripheral member 32 and the central member 31 are the same primary molded body, but are continuous as the primary molded body. Since the elastic member 33 is not formed, the vicinity of the connecting portion 33b of the elastic member 33 is deformed, and the displacement member 30 is easily bent.
Therefore, as shown in FIG. 3B, by bending the displacement member 30 by the writing pressure, the relative positional relationship between the ink supply core 50 and the core peripheral member 20 is displaced, and the ink supply core 50 is immersed in the ink supply core 50. Can be moved to.
一方、図３（Ａ）に示すように、筆記荷重を減らしてインク供給芯50にかかる筆記荷重が弱まった場合には、変位部材30の弾性作用により撓んだ形状が初期の形状に戻り、それに応じてインク供給芯50も突出位置に戻ることとなる。
また、インク供給芯50に対して大きな筆記荷重がかかり、インク供給芯50を没入位置に移動させた場合には、インク供給芯50の代わりに芯周囲部材20が筆記荷重を受けることとなるため、インク供給芯50の折れや潰れを防ぐことができる。さらに、インク供給芯50は芯周囲部材20で覆われている為、筆記具1をぶつけてしまったり、落下により筆記具1に衝撃が加わったりしてもインク供給芯50が破損して筆記不能になることがない。
On the other hand, as shown in FIG. 3A, when the writing load is reduced and the writing load applied to the ink supply core 50 is weakened, the shape bent by the elastic action of the displacement member 30 returns to the initial shape. The ink supply core 50 also returns to the protruding position accordingly.
Further, when a large writing load is applied to the ink supply core 50 and the ink supply core 50 is moved to the immersion position, the core peripheral member 20 receives the writing load instead of the ink supply core 50. , It is possible to prevent the ink supply core 50 from being broken or crushed. Further, since the ink supply core 50 is covered with the core peripheral member 20, even if the writing tool 1 is hit or the writing tool 1 is impacted by dropping, the ink supply core 50 is damaged and writing becomes impossible. Never.
なお、本実施の形態に係る筆記具1は、インク供給芯50に対して後方に大きな筆記荷重がかかると変位部材30の弾性作用に伴って、インク供給芯50が没入位置に移動し、芯周囲部材20の先端からのインク供給芯50の突出距離が小さくなった場合には、滑らかに細い描線を描くことができなくなる。そのため、インク供給芯50が没入位置にある場合において、細い描線を描くためには、使用者は筆記荷重を減少させ、変位部材30の弾性作用によって、インク供給芯50を突出位置に移動させることが必要となる。そして、筆記荷重を減少させ、変位部材30の弾性作用によって、インク供給芯50が突出位置に再び移動した場合には、芯周囲部材20の先端からのインク供給芯50の突出距離が大きくなるので、再び細い描線を描くことができる。 In the writing instrument 1 according to the present embodiment, when a large writing load is applied to the rear of the ink supply core 50, the ink supply core 50 moves to the immersion position due to the elastic action of the displacement member 30, and the ink supply core 50 moves around the core. When the protrusion distance of the ink supply core 50 from the tip of the member 20 becomes small, it becomes impossible to draw a thin line smoothly. Therefore, when the ink supply core 50 is in the immersion position, in order to draw a thin line, the user reduces the writing load and moves the ink supply core 50 to the protruding position by the elastic action of the displacement member 30. Is required. Then, when the writing load is reduced and the ink supply core 50 is moved to the protruding position again due to the elastic action of the displacement member 30, the protrusion distance of the ink supply core 50 from the tip of the core peripheral member 20 becomes large. , You can draw thin lines again.
さらに、本実施の形態においては、インク供給芯50を樹脂素材で形成し、かつ、芯周囲部材20をポリアセタールから形成することとしている。その結果、インク供給芯50と芯周囲部材20との摩擦係数を減少させることができ、インク供給芯50が後方へ移動する滑りが良好となるため、インク供給芯50に斜めから大きな筆記荷重がかかった場合でもインク供給芯50を後方へ移動させることができることとなっている。 Further, in the present embodiment, the ink supply core 50 is formed of a resin material, and the core peripheral member 20 is formed of polyacetal. As a result, the coefficient of friction between the ink supply core 50 and the core peripheral member 20 can be reduced, and the ink supply core 50 slides backward, so that a large writing load is applied to the ink supply core 50 diagonally. Even if it is applied, the ink supply core 50 can be moved backward.
（第２の実施の形態）
（全体構成）
第２の実施の形態に係る筆記具1は、図６（Ａ）に示すように、略円筒形状の軸筒10と、軸筒10の後端に装着される尾栓19と、軸筒10の先端から一部が突出している芯周囲部材20と、芯周囲部材20の先端から一部が突出しているインク供給芯50を備えた外観を呈している。なお、軸筒10の先端側は段階的に縮径した軸筒先端縮径部10aとなっており、この部分には図示しないキャップが装着可能である。
(Second Embodiment)
(overall structure)
As shown in FIG. 6A, the writing tool 1 according to the second embodiment includes a substantially cylindrical shaft cylinder 10, a tail plug 19 attached to the rear end of the shaft cylinder 10, and a shaft cylinder 10. It has an appearance provided with a core peripheral member 20 having a part protruding from the tip and an ink supply core 50 having a part protruding from the tip of the core peripheral member 20. The tip side of the barrel 10 is a barrel tip diameter-reduced portion 10a whose diameter is gradually reduced, and a cap (not shown) can be attached to this portion.
（軸筒10）
本実施の形態に係る筆記具1では、図６（Ｂ）に示すように、軸筒10の内部空間がインクタンク13となっていて、その中にポリエステルファイバー製の中綿18が充填されている。中綿18には水性のインクが浸潤している。インクタンク13の先端には、中心に貫通孔のある略円盤状の芯貫通部材60が係止している。尾栓19は軸筒10の後端から挿入される。尾栓19の先端は中綿18の後端と当接している。すなわち、中綿18は、先端が芯貫通部材60で、後端が尾栓19の先端でそれぞれ支持されている。芯貫通部材60の前方には変位部材30が位置し、さらにその前方には芯周囲部材20が位置している。芯周囲部材20の一部は、上述の通り軸筒10の先端から露出している。変位部材30は、略円筒形状の移動部材36と、これに外挿されるスプリングで構成される弾性部材33とからなる。芯周囲部材20及び変位部材30の構造の詳細については後述する。中綿18の先端側部分には棒状のインク供給芯50が刺設されている。このインク供給芯50は、芯貫通部材60の貫通孔を通り、変位部材30及び芯周囲部材20の内部空間を通過して、先端が芯周囲部材20の先端から露出している。
(Cylinder 10)
In the writing tool 1 according to the present embodiment, as shown in FIG. 6B, the internal space of the shaft cylinder 10 is an ink tank 13, and the batting 18 made of polyester fiber is filled therein. The batting 18 is infiltrated with water-based ink. A substantially disk-shaped core penetrating member 60 having a through hole in the center is locked to the tip of the ink tank 13. The breech plug 19 is inserted from the rear end of the barrel 10. The tip of the breech plug 19 is in contact with the rear end of the batting 18. That is, the tip of the batting 18 is supported by the core penetrating member 60, and the rear end is supported by the tip of the tail plug 19. The displacement member 30 is located in front of the core penetrating member 60, and the core peripheral member 20 is located further in front of the displacement member 30. A part of the core peripheral member 20 is exposed from the tip of the barrel 10 as described above. The displacement member 30 includes a substantially cylindrical moving member 36 and an elastic member 33 composed of a spring externally attached to the moving member 36. The details of the structures of the core peripheral member 20 and the displacement member 30 will be described later. A rod-shaped ink supply core 50 is pierced in the tip side portion of the batting 18. The ink supply core 50 passes through the through hole of the core penetrating member 60, passes through the internal space of the displacement member 30 and the core peripheral member 20, and the tip is exposed from the tip of the core peripheral member 20.
（芯周囲部材20）
図７に示すように、芯周囲部材20は、円筒状の後方円柱部26と、その前方に位置とともに外方に拡径する中間フランジ部27と、その前方に位置するとともに段階的に縮径する先端縮径部28とからなる。中間フランジ部27は、より詳しくは、前方に向かってテーパー状に拡径する後向テーパー面27aと、この前方に位置するとともに前方に向かってテーパー状に縮径する前向テーパー面27bとからなる。また、先端縮径部28は、より詳しくは、前方に向かって緩慢に縮径する第１縮径部28aと、その前方に位置するとともに前方に向かってより急激に縮径する第２縮径部28bと、その前方に位置するとともに前方に向かって先端まで再び緩慢に縮径する第３縮径部28cとからなる。また、芯周囲部材20の側面において軸心を挟んで対向する２箇所が、第１縮径部28aの後方部分を平面上に削ぎ落とすとともに中間フランジ部27及び後方円柱部26を切り欠いた通気溝29として形成されている。インク供給芯50が突出位置にある状態では、この通気溝29と軸筒10の先端開口との間で生じた隙間29aによって軸筒10の内外の通気が可能となっている（図１０参照）。ここで、この芯周囲部材20はポリアセタールで形成されている。
(Core peripheral member 20)
As shown in FIG. 7, the core peripheral member 20 has a cylindrical rear cylindrical portion 26, an intermediate flange portion 27 whose diameter expands outward with a position in front of the cylindrical rear cylindrical portion 26, and an intermediate flange portion 27 located in front of the cylindrical rear cylindrical portion 26 and gradually reduced in diameter. It is composed of a tip diameter reduction portion 28. More specifically, the intermediate flange portion 27 is composed of a rear taper surface 27a whose diameter is tapered toward the front and a forward taper surface 27b which is located in front of the intermediate flange portion 27 and whose diameter is tapered toward the front. Become. More specifically, the tip diameter-reduced portion 28 includes a first diameter-reduced portion 28a that slowly contracts toward the front and a second diameter-reduced portion 28a that is located in front of the tip-reduced portion 28 and contracts more rapidly toward the front. It is composed of a portion 28b and a third diameter-reduced portion 28c located in front of the portion 28b and slowly reducing the diameter toward the tip toward the front. Further, on the side surface of the core peripheral member 20, two points facing each other across the axial center scrape off the rear portion of the first reduced diameter portion 28a on a flat surface, and the intermediate flange portion 27 and the rear cylindrical portion 26 are cut out for ventilation. It is formed as a groove 29. When the ink supply core 50 is in the protruding position, the gap 29a generated between the ventilation groove 29 and the tip opening of the shaft cylinder 10 enables ventilation inside and outside the shaft cylinder 10 (see FIG. 10). .. Here, the core peripheral member 20 is made of polyacetal.
また、芯周囲部材20には、その後端から先端にかけて孔が貫通している。具体的には、後端から第１縮径部28aの中途箇所までの内周部分が後部挿入孔24であり、その先のより小径の内周部分が前部挿入孔25である。 Further, the core peripheral member 20 has a hole penetrating from the rear end to the tip. Specifically, the inner peripheral portion from the rear end to the middle portion of the first reduced diameter portion 28a is the rear insertion hole 24, and the inner peripheral portion having a smaller diameter beyond that is the front insertion hole 25.
（変位部材30）
図６（Ｂ）に示すように、変位部材30は、略円筒形状の移動部材36と、これに外挿される弾性部材33で構成される。図８に示すように、移動部材36は円筒形状の中間円柱部36bと、中間円柱部36bの後端がフランジ状に拡径した後端フランジ部36cと、中間円柱部36bの先端側が縮径した先端円柱部36aとからなる。後端フランジ部36cの円周において軸心を挟んで対向する２箇所の円弧部分が切り欠かれた切欠部36dとなっている。
(Displacement member 30)
As shown in FIG. 6B, the displacement member 30 is composed of a substantially cylindrical moving member 36 and an elastic member 33 externally inserted thereto. As shown in FIG. 8, the moving member 36 has a cylindrical intermediate columnar portion 36b, a rear end flange portion 36c in which the rear end of the intermediate columnar portion 36b has a flange-like diameter, and a tip side of the intermediate columnar portion 36b has a reduced diameter. It is composed of a cylindrical tip portion 36a. On the circumference of the rear end flange portion 36c, two arc portions facing each other across the axial center are notched portions 36d.
図９に示すように、芯貫通部材60の弾性部材33は中間円柱部36bの外周面に外挿される。弾性部材33の後端は後端フランジ部36cの前方側の面で支持される。ここで、軸筒先端縮径部10aの内部において、芯貫通部材60の前方部分の内径は弾性部材33の外径より大きく、この部分が変位部材収容部10bとなっている。また、変位部材収容部10bの前方の空間は段差10cをもって縮径した軸筒縮径部10dとなっている。軸筒縮径部10dの内径は弾性部材33の外径より小さい。弾性部材33の先端はこの段差10cで支持される。軸筒縮径部10dの先端部分の内径はわずかに拡径しておりこの部分が軸筒先端孔10eとなっている。 As shown in FIG. 9, the elastic member 33 of the core penetrating member 60 is externally inserted into the outer peripheral surface of the intermediate cylindrical portion 36b. The rear end of the elastic member 33 is supported by the front surface of the rear end flange portion 36c. Here, inside the barrel tip reduced diameter portion 10a, the inner diameter of the front portion of the core penetrating member 60 is larger than the outer diameter of the elastic member 33, and this portion serves as the displacement member accommodating portion 10b. Further, the space in front of the displacement member accommodating portion 10b is a shaft cylinder reduced diameter portion 10d whose diameter is reduced by a step 10c. The inner diameter of the barrel reduced diameter portion 10d is smaller than the outer diameter of the elastic member 33. The tip of the elastic member 33 is supported by this step 10c. The inner diameter of the tip portion of the shaft cylinder reduced diameter portion 10d is slightly expanded, and this portion is the shaft cylinder tip hole 10e.
芯周囲部材20の後方円柱部26は、図９に示すようにインク供給芯50が突出位置にある状態（以下、「突出状態」とする。）においては、軸筒縮径部10d及び軸筒先端孔10eの内部に位置している。そして、段差10cに跨がる位置で、移動部材36の先端円柱部36aは、芯周囲部材20の後端から後部挿入孔24に圧入されて固定されている。突出状態においてはさらに、中間フランジ部27の後向テーパー面27aが軸筒先端孔10eの先端縁と当接している。インクタンク13から芯貫通部材60及び変位部材30を貫通したインク供給芯50は後部挿入孔24を通り前部挿入孔25を摺動自在に貫通してその先端を第３縮径部28cの先端から露出させている。なお、インク供給芯50の材質については前記第１の実施形態と同様である。 As shown in FIG. 9, the rear cylindrical portion 26 of the core peripheral member 20 has a shaft cylinder reduced diameter portion 10d and a shaft cylinder when the ink supply core 50 is in the protruding position (hereinafter referred to as “protruding state”). It is located inside the tip hole 10e. Then, at a position straddling the step 10c, the tip cylindrical portion 36a of the moving member 36 is press-fitted into the rear insertion hole 24 from the rear end of the core peripheral member 20 and fixed. Further, in the protruding state, the backward tapered surface 27a of the intermediate flange portion 27 is in contact with the tip edge of the barrel tip hole 10e. The ink supply core 50 that has passed through the core penetrating member 60 and the displacement member 30 from the ink tank 13 passes through the rear insertion hole 24 and slidably penetrates the front insertion hole 25, and the tip thereof is the tip of the third reduced diameter portion 28c. It is exposed from. The material of the ink supply core 50 is the same as that of the first embodiment.
（変位部材30の撓みの説明）
突出状態においては、図９に示すように、弾性部材33によって移動部材36が後方に付勢され、後端フランジ部36cが芯貫通部材60に当接している。これにより、移動部材36に固定されている芯周囲部材20も後方へ付勢され、中間フランジ部27の後向テーパー面27aが軸筒先端孔10eの先端縁と当接している。この状態を斜視図で示したのが図１０であり、インク供給芯50の先端は芯周囲部材20に対して相対的に突出した状態を保っている。
(Explanation of deflection of displacement member 30)
In the protruding state, as shown in FIG. 9, the moving member 36 is urged rearward by the elastic member 33, and the rear end flange portion 36c is in contact with the core penetrating member 60. As a result, the core peripheral member 20 fixed to the moving member 36 is also urged rearward, and the rearward tapered surface 27a of the intermediate flange portion 27 is in contact with the tip edge of the barrel tip hole 10e. This state is shown in a perspective view in FIG. 10, and the tip of the ink supply core 50 is maintained in a state of being relatively protruding with respect to the core peripheral member 20.
筆記状態においては、インク供給芯50は筆記面に対して垂直に押圧されることは稀であり、幾分かの角度をもって斜めに押圧されることが多い。その場合、インク供給芯50に加圧により撓みが生ずるが、この撓みにより生じた力により、筆記面とはインク供給芯50を挟んだ反対側の中間フランジ部27の後向テーパー面27aが軸筒先端孔10eの先端縁から滑るようにして前方へ移動する。一方、この反対側の中間フランジ部27は軸筒先端孔10eの先端縁から離れる。これに伴い、図１１に示すように芯周囲部材20は軸筒に対して斜めに傾いた状態となる。そして芯周囲部材20に固定されている移動部材36もこれに伴い同様に傾いた状態となって、芯貫通部材60の端面から離れる。そして、芯周囲部材20が先端方向へ移動したことによって、インク供給芯50の先端は芯周囲部材20に対して相対的に没入した状態となる（以下、「没入状態」とする。）。 In the writing state, the ink supply core 50 is rarely pressed perpendicular to the writing surface, and is often pressed diagonally at some angle. In that case, the ink supply core 50 is bent by pressurization, but due to the force generated by this bending, the backward tapered surface 27a of the intermediate flange portion 27 on the opposite side of the ink supply core 50 from the writing surface is the axis. It slides forward from the tip edge of the tube tip hole 10e. On the other hand, the intermediate flange portion 27 on the opposite side is separated from the tip edge of the barrel tip hole 10e. Along with this, as shown in FIG. 11, the core peripheral member 20 is in a state of being inclined obliquely with respect to the barrel. Then, the moving member 36 fixed to the core peripheral member 20 is also in an inclined state in the same manner, and is separated from the end face of the core penetrating member 60. Then, as the core peripheral member 20 moves toward the tip, the tip of the ink supply core 50 is in a state of being relatively immersive with respect to the core peripheral member 20 (hereinafter, referred to as "immersive state").
この没入状態から、筆記先端を紙面から離すと、インク供給芯50への加圧が解かれ、弾性部材33が復元し、芯周囲部材20もそれに伴い軸筒先端縮径部10aの内部へ後退し、図９及び図１０に示す突出状態に復帰する。 When the writing tip is separated from the paper surface from this immersive state, the pressure on the ink supply core 50 is released, the elastic member 33 is restored, and the core peripheral member 20 also recedes into the inside of the barrel tip reduced diameter portion 10a accordingly. Then, it returns to the protruding state shown in FIGS. 9 and 10.
（その他）
なお、上記第２の実施の形態では弾性部材33としてのスプリングは筆記先端への加圧によって圧縮されることとなっているが、それには限られない。たとえば、図９に示す突出状態において、移動部材36と芯貫通部材60とが離間した位置を保つとともに、これらの部材が、これらの間に介在する、弾性部材33としての自然長のスプリングで連結されるようにすることができる。このようにすることで、筆記先端に何らの力もかかっていない状態では、移動部材36が常に弾性部材33によって後方に引きつけられているようにすることができる。そして、インク供給芯50が加圧された際には、弾性部材33が引っ張られて延伸することを除けば、第２の実施の形態に示すのと同様に芯周囲部材20を挙動させることが可能である。
(Other)
In the second embodiment, the spring as the elastic member 33 is compressed by the pressure applied to the writing tip, but the present invention is not limited to this. For example, in the protruding state shown in FIG. 9, the moving member 36 and the core penetrating member 60 are maintained at separate positions, and these members are connected by a naturally long spring as an elastic member 33 interposed between them. Can be done. By doing so, it is possible to ensure that the moving member 36 is always attracted to the rear by the elastic member 33 when no force is applied to the writing tip. Then, when the ink supply core 50 is pressurized, the core peripheral member 20 can be made to behave in the same manner as shown in the second embodiment, except that the elastic member 33 is pulled and stretched. It is possible.
1 筆記具
10 軸筒
10a 軸筒先端縮径部 10b 変位部材収容部
10c 段差 10d 軸筒縮径部
10e 軸筒先端孔
11 先軸 12 後軸
13 インクタンク 14 先軸後部
15 先軸鍔部
16 先軸前部
16a 先軸前部縮径孔 16b 芯周囲部材挿入孔
17 グリップ部材 18 中綿
19 尾栓
20 芯周囲部材 21 芯周囲部材固定部
22 芯周囲部材テーパー部 23 芯周囲部材先端部
24 後部挿入孔 25 前部挿入孔
26 後方円柱部
27 中間フランジ部
27a 後向テーパー面 27b 前向テーパー面
28 先端縮径部
28a 第１縮径部 28b 第２縮径部
28c 第３縮径部
29 通気溝 29a 隙間
30 変位部材
31 中心部材
31a 後方挿入孔 31c 前方挿入孔
31d 後方円柱部後部 31e 中心部材鍔部
31f 後方円柱部前部 31g 中間円柱部
31h 前方円柱部
32 周辺部材
32a 内周面 32b 周辺部材内方突起
32c 周辺部材後方外周部 32d 周辺部材中間外周部
32e 周辺部材前方外周部 32f 周辺部材外方突部
33 弾性部材
33a 弾性部材後方円柱部 33b 連結部
33c 弾性部材前方円錐部
34 空隙部 35 内方突起
36 移動部材
36a 先端円柱部 36b 中間円柱部
36c 後端フランジ部 36d 切欠部
40 コレクター 41 コレクター芯
50 インク供給芯 51 被覆部材
60 芯貫通部材
1 Stationery
10 axle cylinder
10a Shaft cylinder tip diameter reduction part 10b Displacement member accommodating part
10c Step 10d Shaft diameter reduced part
10e Shaft tube tip hole
11 Front axis 12 Rear axis
13 Ink tank 14 Rear of front shaft
15 Lead shaft collar
16 Front shaft
16a Front shaft reduced diameter hole 16b Core peripheral member insertion hole
17 Grip member 18 Batting
19 Breech plug
20 Core peripheral member 21 Core peripheral member fixing part
22 Core peripheral member taper part 23 Core peripheral member tip
24 Rear insertion hole 25 Front insertion hole
26 Rear cylinder
27 Intermediate flange
27a Backward taper surface 27b Forward taper surface
28 Tip diameter reduction part
28a 1st reduced diameter part 28b 2nd reduced diameter part
28c 3rd reduced diameter part
29 Ventilation groove 29a Gap
30 Displacement member
31 Central member
31a Rear insertion hole 31c Front insertion hole
31d Rear cylindrical part Rear part 31e Central member collar part
31f Rear cylinder front 31g Intermediate cylinder
31h Front cylinder
32 Peripheral members
32a Inner peripheral surface 32b Peripheral member Inner protrusion
32c Peripheral member rear outer circumference 32d Peripheral member intermediate outer circumference
32e Peripheral member Front outer circumference 32f Peripheral member Outer protrusion
33 Elastic member
33a Elastic member Rear cylindrical part 33b Connecting part
33c Elastic member front cone
34 Void 35 Inward protrusion
36 Moving member
36a Tip cylinder 36b Intermediate cylinder
36c Rear end flange 36d Notch
40 collector 41 collector core
50 Ink supply core 51 Covering member
60 core penetration member
Claims (1)
前記軸筒の内部に収容され、毛細管力によってインクを誘導可能なインク供給芯と、
前記インク供給芯の外周を覆う芯周囲部材とを備え、前記インク供給芯及び前記芯周囲部材の一部が前記軸筒の先端から突出した筆記具において、
前記インク供給芯の先端部分が前記芯周囲部材の先端から突出しており、かつ、この突出している寸法が前記インク供給芯の径の１００％以上であり、
前記インク供給芯が加圧により前記芯周囲部材に対して相対的に没入を開始する際に該インク供給芯に加わるセット荷重が１Ｎ以上７Ｎ以下に形成され、
前記インク供給芯と前記芯周囲部材との軸方向の位置関係を相対的に変えることができる変位部材を備えるとともに、
前記セット荷重が前記インク供給芯に加わることで前記芯周囲部材が前進を開始することを特徴とする筆記具。 Axial tube and
An ink supply core housed inside the barrel and capable of guiding ink by capillary force,
In a writing tool provided with a core peripheral member that covers the outer periphery of the ink supply core, the ink supply core and a part of the core peripheral member protrude from the tip of the barrel.
The tip portion of the ink supply core protrudes from the tip of the core peripheral member, and the protruding dimension is 100% or more of the diameter of the ink supply core.
When the ink supply core starts immersing relative to the core peripheral member by pressurization, the set load applied to the ink supply core is formed to be 1N or more and 7N or less.
In addition to being provided with a displacement member capable of relatively changing the positional relationship between the ink supply core and the core peripheral member in the axial direction,
A writing tool characterized in that the core peripheral member starts advancing when the set load is applied to the ink supply core.
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| JP6804924B2 (en) * | 2015-10-19 | 2020-12-23 | 三菱鉛筆株式会社 | Writing implements |
| JP7326000B2 (en) * | 2018-08-22 | 2023-08-15 | 三菱鉛筆株式会社 | Writing instruments and writing instrument sets |
| JP7269086B2 (en) * | 2019-04-26 | 2023-05-08 | ゼブラ株式会社 | writing instrument |
| JP7370180B2 (en) * | 2019-07-02 | 2023-10-27 | 三菱鉛筆株式会社 | applicator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52136736U (en) * | 1976-04-12 | 1977-10-17 | ||
| JPS5757982U (en) * | 1980-09-20 | 1982-04-05 | ||
| JPH058155Y2 (en) * | 1987-03-09 | 1993-03-01 | ||
| JP2015123689A (en) * | 2013-12-26 | 2015-07-06 | ゼブラ株式会社 | Writing instrument |
| JP2017077730A (en) * | 2015-10-19 | 2017-04-27 | 三菱鉛筆株式会社 | Writing instrument |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3133495U (en) * | 2007-05-01 | 2007-07-12 | パイロットインキ株式会社 | Ink tank exchangeable writing instrument |
| JP2010274626A (en) * | 2009-06-01 | 2010-12-09 | Pilot Ink Co Ltd | Application tool |
| JP5757982B2 (en) | 2013-09-26 | 2015-08-05 | シャープ株式会社 | Activity support device, portable terminal, and activity support system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52136736U (en) * | 1976-04-12 | 1977-10-17 | ||
| JPS5757982U (en) * | 1980-09-20 | 1982-04-05 | ||
| JPH058155Y2 (en) * | 1987-03-09 | 1993-03-01 | ||
| JP2015123689A (en) * | 2013-12-26 | 2015-07-06 | ゼブラ株式会社 | Writing instrument |
| JP2017077730A (en) * | 2015-10-19 | 2017-04-27 | 三菱鉛筆株式会社 | Writing instrument |
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| JP7454718B2 (en) | 2024-03-22 |
| JP2017077730A (en) | 2017-04-27 |
| JP7217254B2 (en) | 2023-02-02 |
| JP2023040304A (en) | 2023-03-22 |
| JP6804924B2 (en) | 2020-12-23 |
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