JP2023040304A - writing instrument - Google Patents

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Publication number
JP2023040304A
JP2023040304A JP2023008400A JP2023008400A JP2023040304A JP 2023040304 A JP2023040304 A JP 2023040304A JP 2023008400 A JP2023008400 A JP 2023008400A JP 2023008400 A JP2023008400 A JP 2023008400A JP 2023040304 A JP2023040304 A JP 2023040304A
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Japan
Prior art keywords
core
ink supply
tip
supply core
barrel
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JP7454718B2 (en
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徹 中島
Toru Nakajima
和彦 古川
Kazuhiko Furukawa
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Mitsubishi Pencil Co Ltd
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Mitsubishi Pencil Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument formed of a non-valve system, that is, a connector structure, and capable of preventing breaking and collapse of a pen core when a large writing load is applied to the pen core.
SOLUTION: A writing instrument 1 comprises a displacement member 30 in which a tip part of an ink supply core 50 projects from the tip of a core peripheral member 20, and this projecting dimension is 100% or more of a diameter of the ink supply core 50, and when the ink supply core 50 starts relatively immersion to the core peripheral member by pressurization, a set load added to the ink supply core 50 is formed in 1 N-7 N, and the positional relationship in the axial direction between the ink supply core 50 and the core peripheral member 20 can be relatively changed.
SELECTED DRAWING: Figure 3
COPYRIGHT: (C)2023,JPO&INPIT

Description

本発明は、筆記具に関する。 The present invention relates to writing instruments.

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 breaking or collapsing when a large writing load is applied to the pen core, a writing instrument has been provided in which a spring is attached around the pen core so that the pen core can move back and forth. .
The above writing instrument is designed 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.

実用新案公報 平5-8155号公報Utility Model Publication No. 5-8155 実用新案公報 平5-6153号公報Utility Model Publication No. 5-6153 公表特許公報 2004-520980号公報Published Patent Publication No. 2004-520980

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 (pressing the pen core against paper several times to eject ink to the pen core) in order to supply ink to the pen core. There is, and work will be imposed on the user before writing.
Accordingly, an object of the present invention is to provide a writing instrument that can prevent the pen core from breaking or collapsing 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 configuration.

(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)
A writing instrument 1 according to a first aspect of the present invention comprises a barrel 10, an ink supply core 50 housed inside the barrel 10 and capable of guiding ink by capillary force, and an outer circumference of the ink supply core 50. and a part of the ink supply lead 50 and the core surrounding member 20 protruding from the tip of the shaft tube 10, wherein the tip portion of the ink supply lead 50 extends from the tip of the core periphery The ink supply core 50 protrudes from the tip of the member 20, and the dimension of this projection is 100% or more of the diameter of the ink supply core 50. The set load applied to the ink supply core 50 when starting to be submerged into the ink supply core 50 is set to 1 N or more and 7 N or less, and the axial positional relationship between the ink supply core 50 and the core surrounding member 20 can be relatively changed. It is characterized by having a displacement member 30 that can be displaced.

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 instrument 1, and has a closed rear end, a tapered front end, and an open front end surface. Further, the inside of the shaft cylinder 10 contains ink. The method is not particularly limited, and the ink may be stored directly inside the barrel 10, or an ink refill filled with ink may be stored inside the barrel 10. good too.
Here, by covering at least part of the outer periphery of the ink supply core 50 with a coating member 51 described later, the rigidity and abrasion resistance of the ink supply core 50 can be improved. The coating member 51 is, for example, a member in which at least a part of the outer periphery of the ink supply core 50 is coated.

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 the load applied to the ink supply core 50 when the ink supply core 50 starts to sink relative to the core surrounding member 20 due to 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 surrounding member 20 . In the displacement member 30, the ink supply core 50 is formed to be movable with respect to the core surrounding member 20, and the ink supply core 50 is displaced. It includes both cases in which the core surrounding member 20 is displaced. The distance between the outer peripheral portion of the ink supply core 50 and the tip edge of the core surrounding member 20 is preferably 0.05 mm at maximum.
It should be noted that the fact that the ink supply core 50 starts to be retracted relative to the core surrounding member 20 by pressurization means that the set load generated by the pressurization is applied to the ink supply core 50, and the ink supply core This includes both 50 beginning to retract and the pericardial member 20 beginning to advance.

(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)
According to a second aspect of the present invention, in addition to the features of the first aspect, the displacement member 30 includes an elastic member 33 arranged behind the core surrounding member 20, and the elastic member 33 is tensioned. Alternatively, by being compressed, the relative positional relationship between the ink supply core 50 and the core surrounding member 20 can be changed, and the protruding portion of the ink supply core 50 from the core surrounding member 20 can be changed. As the initial position, a load is applied to the tip of the ink supply core 50 and the elastic member 33 is stretched or compressed, so that the ink supply core 50 moves backward relative to the core surrounding member 20. It is characterized by being formed so that

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 elastic action of the elastic member 33 restores the stretched or compressed shape to the initial shape. is possible.
The elastic member 33 shifts the relative positional relationship between the ink supply core 50 and the core surrounding member 20 by moving the ink supply core 50 relatively rearward with respect to the core surrounding member 20 with its own elastic action. and a position where the ink supply core 50 protrudes from the tip of the core surrounding 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 addition to the characteristics of the first and second inventions, the third invention of the present invention has an ink supply space having a gap where capillary force is generated inside the ink supply core 50, The ink is guided by the capillary force of the ink supply space.
The present invention specifies the locations where the capillary force is generated in the ink supply core 50 of the first and second inventions.
The ink supply space in the third invention is such that when the ink supply core 50 is formed by extrusion molding, finely controlled passages are left inside, and the passages are used to guide the ink.

(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 addition to the characteristics of the first and second inventions, the fourth invention of the present invention has an ink supply space having a gap where capillary force is generated outside the ink supply core 50, The ink is guided by the capillary force of the ink supply space.
The present invention specifies the locations where the capillary force is generated in the ink supply core 50 of the first and second inventions.
The ink supply space in the fourth aspect of the invention is such that when the ink supply core 50 is formed by extrusion molding, finely controlled passages are left outside, and the passages are used to guide the ink.

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。
ADVANTAGE OF THE INVENTION Since this invention is comprised as mentioned above, there exist the following effects.
In the writing instrument according to the present invention, the displacement member can change the relative positional relationship between the ink supply core and the core surrounding member. Therefore, when the ink supply core is in the projecting position, only the ink supply core can be brought into contact with the writing surface, so that a drawn line can be drawn with the ink held by the ink supply core.
On the other hand, when a large writing load is applied to the ink supply lead and the ink supply lead moves to the retracted position, the writing load is applied to the member surrounding the ink supply lead instead of the ink supply lead. It can prevent breakage and crushing. Therefore, the present invention is particularly suitable for a writing instrument having an ink supply core with an outer diameter of 1.0 mm or less for drawing fine lines.

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。
Moreover, when the displacement member is provided with an elastic member, the following effects are obtained.
When a large writing load is applied to the ink supply lead, the elastic member can move the ink supply lead to the retracted position in accordance with its elastic action. 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 its elastic action, thereby moving the ink supply core to the projecting position.

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。 Furthermore, according to the above configuration, the ink supply space can be put into a pressurized state 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. quantity can be good.

第1の実施の形態に係る筆記具の突出位置における正面図(A)及び正面断面図(B)である。It is the front view (A) and front sectional drawing (B) in the protrusion position of the writing instrument which concerns on 1st Embodiment. 第1の実施の形態に係る筆記具の没入位置における正面図(A)及び正面断面図(B)である。It is the front view (A) and front cross-sectional view (B) in the retracted position of the writing instrument which concerns on 1st Embodiment. 第1の実施の形態に係る筆記具の突出位置における前方側の拡大断面図(A)及び没入位置における前方側の拡大断面図(B)である。FIG. 4A is an enlarged front side cross-sectional view (A) of the writing instrument at the protruded position and (B) is an enlarged front side cross-sectional view at the retracted position of the writing instrument according to the first embodiment; 第1の実施の形態に係るインク供給芯及び被覆部材における正面図(A)及び正面断面図(B)である。3A and 3B are a front view (A) and a front cross-sectional view (B) of the ink supply core and the covering member according to the first embodiment. FIG. 第1の実施の形態に係る変位部材の斜視図(A)、正面図(B)及び正面断面図(C)である。It is the perspective view (A), front view (B), and front sectional view (C) of the displacement member which concerns on 1st Embodiment. 第2の実施の形態に係る筆記具の正面図(A)及び正面断面図(B)である。It is the front view (A) and front cross-sectional view (B) of the writing instrument which concerns on 2nd Embodiment. 図6に示す芯周囲部材の前方斜視図(A)、底面図(B)、正面図(C)、正面断面図(D)、側面図(E)、側面断面図(F)、後方斜視図(G)及び平面図(H)である。Front perspective view (A), bottom view (B), front view (C), front cross-sectional view (D), side view (E), side cross-sectional view (F), and rear perspective view of the core peripheral member shown in FIG. (G) and a plan view (H). 図6に示す変位部材を構成する移動部材の前方斜視図(A)、底面図(B)、正面図(C)、側面図(D)、側面断面図(E)、後方斜視図(F)及び平面図(G)である。Front perspective view (A), bottom view (B), front view (C), side view (D), side cross-sectional view (E), and rear perspective view (F) of the moving member constituting the displacement member shown in FIG. and a plan view (G). インク供給芯が突出位置にある状態の先端部分の拡大断面図である。4 is an enlarged cross-sectional view of the tip portion of the ink supply core in a protruding position; FIG. 図9の状態を前方斜視図で示したものである。The state of FIG. 9 is shown in a front perspective view. インク供給芯が没入位置にある状態の先端部分の拡大断面図である。4 is an enlarged cross-sectional view of the tip portion of the ink supply core in a retracted position; FIG. 図11の状態を前方斜視図で示したものである。FIG. 12 shows the state of FIG. 11 in a front perspective view.

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 a writing instrument 1 according to the present embodiment, a writing instrument 1 having an ink supply core 50 as a writing tip at the tip of a barrel 10 will be described as an example with reference to the drawings. In the present invention, "front" and "front end" of the writing instrument 1 and its constituent parts indicate the direction in which the ink supply core 50 is provided, and "rear" and "rear end" indicate the opposite direction. 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, a writing instrument 1 according to the first embodiment includes a barrel 10 having a front barrel 11 and a rear barrel 12, and a core peripheral member fixed to the front side of the front barrel 11. 20 and has an appearance. Further, inside the barrel 10, as shown in FIG. 1B, an ink supply lead 50 as a writing tip is accommodated from the front side of the front barrel 11 to the tip of the lead surrounding member 20. As shown in FIG. Note that FIG. 2A is a front view showing the appearance of the writing instrument 1 at the retracted position, and the dimension of the ink supply lead 50 protruding from the core surrounding member 20 is smaller than that in FIG. 1A. The configuration is the same as that of FIG. 2(B) also has the same configuration as that of FIG. 1(B), except that the dimension of the ink supply core 50 protruding from the core surrounding 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。
(Axle 10)
As shown in FIG. 1B, the structure of the writing instrument 1 according to the present embodiment includes a cylindrical ink tank 13 with a closed rear end and a cylindrical front barrel 11 with a tapered tip. and a cylindrical rear shaft 12 whose rear end is closed. The front end of the ink tank 13 is fitted in the inner circumference of the rear end of the front barrel 11 . The rear end of front barrel 11 is fitted into the inner circumference of the front end of rear barrel 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 axle 11)
As shown in FIG. 1(B), the front barrel 11 has a substantially cylindrical shape and has a tapered tip. A front barrel collar portion 15 is provided on the outer periphery of the front barrel 11 at a position spaced apart from the rear end of the front barrel 11 by a distance of about 1/4 of the total length of the front barrel 11 . The outer diameter of the front barrel collar portion 15 is substantially the same as the outer diameter of the rear barrel 12, and the tip of the rear barrel 12 abuts thereon. The front barrel 11 has a front barrel rear portion 14 having a substantially cylindrical shape and a front barrel front portion 16 having a tapered shape with the front barrel collar 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. 3(A), the tip portion of the front barrel portion 16 has a diameter-reduced diameter hole 16a having a stepped portion, through which the tip of a displacement member 30 (to be described later) passes through, and a stepped portion. A core-surrounding-member insertion hole 16b is provided which has a reduced diameter at the end and is connected to the front of the front barrel reduced diameter hole 16a. A core surrounding member 20 is inserted into the core surrounding member insertion hole 16b. In addition, a relatively wide groove is provided on the outer periphery of the front barrel front portion 16 near the tip, and a grip member 17 is attached to prevent slippage.

(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 inside the front barrel front portion 16 . In the collector 40, a plurality of plate-like members are arranged in parallel in the axial direction, and ink (not shown) can be retained between these plate-like members. Furthermore, a collector core 41 made of a fiber bundle is inserted through the axis of the collector 40 . A displacement member 30 is attached to the 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. 5(A), the displacement member 30 includes a substantially cylindrical central member 31 and a gap 34 that is the thickness of the tip of the collector 40 on the outer circumference of the central member 31, which is closer to the rear than the middle of the central member 31. It consists of a molded substantially cylindrical 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, inside the central member 31, the collector core 41 is inserted from the rear, and the ink supply core 50 is inserted from the front. The rear end of the ink supply core 50 is pierced to the tip of the collector core 41 .
As shown in FIG. 5(C), a rear insertion hole 31a having substantially the same diameter as that of 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, and ink is supplied to the center member 31. A front insertion hole 31c having substantially the same diameter as the supply core 50 is provided in front thereof.

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 center member collar portion 31e is formed near the middle of the outer periphery of the center member 31. As shown in FIG. Furthermore, the central member 31 has a rear cylindrical portion rear portion 31d from the rear end to the central member collar portion 31e, and a rear cylindrical portion located from the central member collar portion 31e to a point closer to the rear end than the tip of the rear insertion hole 31a. A front portion 31f, an intermediate columnar portion 31g located slightly forward of the tip of the rear cylindrical portion front portion 31f to the tip of the rear insertion hole 31a, and a front portion located from the tip of the intermediate columnar portion 31g to the tip of the central member 31 and a cylindrical portion 31h. In the state where the ink supply core 50 is attached to the displacement member 30, an inward protrusion 35 is formed by punching from the outer periphery to the inner side around the middle of the front cylindrical portion 31h (see FIG. 3). The inward projection 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 hinder 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 rear 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 the same as that of the rear cylindrical portion front portion 31f. The diameter is slightly smaller than the outer diameter. Furthermore, 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 surrounding member 20 shown in FIG. 3(A).

(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 approximately the same as the outer diameter of the tip of the collector 40 . Further, as shown in FIG. 5(C), an annular peripheral member inward projection 32b is provided at a portion closer to the rear end than the middle of the inner peripheral surface 32a of the peripheral member 32. As shown in FIG. In addition, the peripheral member inward projection 32b is provided so that the distal end portion of the collector 40 is sandwiched between the peripheral member 32 and the central member 31. As shown in FIG.

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。
In addition, the outer periphery of the peripheral member 32 includes a peripheral member rear peripheral portion 32c located between the rear end and the peripheral member inner projection 32b, and a peripheral member rear peripheral portion 32c connected to the peripheral member rear peripheral portion 32c and having a reduced outer diameter. It is composed of a 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, is located up to the tip of the peripheral member 32, and has a reduced outer diameter.
An annular peripheral member outward 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. 5(C), the elastic member 33 covers the peripheral member front outer peripheral portion 32e of the peripheral member 32, and has an outer diameter that is substantially the same as the diameter of the peripheral member intermediate outer peripheral portion 32d and has a substantially cylindrical shape. and a connecting portion 33b connected to the elastic member rear columnar portion 33a, covering up to a position closer to the rear of the central member collar portion 31e, and gradually reducing in diameter in a bellows shape, and connecting It comprises an elastic member front conical portion 33c which is connected to the portion 33b, covers up to the rear portion of the intermediate columnar portion 31g, and has 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 columnar portion 33a covers from the rear end of the peripheral member front peripheral portion 32e to the tip of the peripheral member front peripheral portion 32e, and as a result is engaged with the peripheral member outward projection 32f.
Here, the inner periphery of the elastic member 33 is formed so as to closely contact the outer periphery of the central member 31 and the peripheral member 32, and the inner diameter of the rear end side of the connecting portion 33b is the same as the inner diameter of the peripheral member 32. In addition, the inner diameter of the front side of the connecting portion 33b 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 molded by two-color molding, in which the central member 31 and the peripheral member 32 are molded by primary molding, and the elastic member 33 is integrally molded with the central member 31 and the peripheral member 32 by secondary molding. are doing. The elastic member 33 is made of an elastic resin material so that the connecting portion 33b is flexible.
Further, as the elastic resin material, a thermoplastic elastomer is desirable because the molding process is performed at high temperature using a mold. It should be noted that 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 higher rigidity than the elastic member 33. As shown in FIG.

(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。
(Description of deflection of displacement member 30)
The process of moving the ink supply core 50 from the protruded position to the retracted position when a large writing load is applied to the ink supply core 50 will be described below with reference to FIG.
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 deflection.

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 lead 50 when the ink supply lead 50 starts to retreat due to pressure is set between 1N and 7N in the present embodiment. When a load larger than the set load is applied, the elastic member 33 is elastically deformed and flexed. The reason why the set load is set to 1 N or more in this embodiment is that if the set load is less than 1 N, the ink supply lead 50 moves backward with some writing load, and the ink supply lead 50 rattles, resulting in a feeling of writing. because it gets worse. On the other hand, the reason why the set load is set to 7N or less in the present embodiment is that if the set load is greater than 7N, the ink supply lead 50 will not move backward even with a slight writing load, so the ink supply lead 50 will not be able to handle all of the writing. This is because the ink supply core 50 may be broken or crushed as a result of receiving a 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. 3(A) is an enlarged cross-sectional view showing the projecting position of the writing instrument 1. When a load larger than the set load is applied, the elastic member 33 becomes elastic as shown in FIG. 3(B). As the ink supply core 50 is deformed and flexed, the ink supply core 50 also moves backward, and the writing instrument 1 moves from the projecting position to the retracting 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-surrounding member 20 includes a cylindrical core-surrounding-member fixing portion 21 and a substantially conical shape that is connected to the core-surrounding-member fixing portion 21 with a stepped portion that is once expanded in diameter. It consists of a core peripheral member tapered portion 22 . At the tip of the core surrounding member tapered portion 22, a chamfered core surrounding member distal end portion 23 is provided. Here, core surrounding member 20 in the present embodiment is made of polyacetal.
A hole penetrates through the core surrounding member 20 from its rear end to its tip. Specifically, the inner periphery from the core-surrounding member fixing portion 21 to the portion beyond the stepped portion to the core-surrounding member tapered portion 22 is the rear insertion hole 24, and the inner periphery of the core-surrounding member tapered portion 22 beyond that is the rear insertion hole 24. is the 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-surrounding member fixing portion 21 is fixed to the front barrel 11 by being mounted in the core-surrounding member insertion hole 16b. The core surrounding member 20 covers the ink supply core 50 and a covering member 51 which will be 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 extruding a resin material such as polyacetal. At the time of extrusion molding, a passage for guiding ink to the tip of the ink supply core 50 by capillary action, that is, an ink supply space is formed. Further, as shown in FIG. 4B, the outer periphery of the ink supply core 50 is covered with a covering member 51. As shown in FIG. Note that the covering member 51 may be any member as long as it covers the outer periphery of the ink supply core 50, and may be an independent tubular resin member as in the present embodiment. The outer circumference may be coated with resin or the like. Since the outer periphery of the ink supply core 50 is covered with the covering member 51, the outer periphery 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. can be easily inserted, and the strength of the ink supply core 50 can be maintained. The ink supply core 50 is made of natural fiber, animal hair fiber, polyacetal resin, polyethylene resin, acrylic resin, polyester resin, polyamide resin, polyurethane resin, polyolefin resin, polyvinyl resin, polycarbonate resin. , Polyether resin, polyphenylene resin, etc., parallel fiber bundles composed of one or a combination of two or more types, fiber cores such as felt, or fiber cores obtained by processing these fiber bundles with resin, or various plastic powders. It is good also as a porous body (sintered core) which sintered etc.

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 be formed by forming a gap in which a capillary force is generated inside the ink supply core 50 during extrusion molding, or by forming a gap in which a capillary force is generated outside the ink supply core 50. It is possible.
Here, in the present embodiment, the distance between the outer peripheral portion of the ink supply core 50 and the tip end portion 23 of the core surrounding member is formed to be 0.05 mm at maximum. In this way, by minimizing the distance between the outer peripheral portion of the ink supply core 50 and the tip end portion 23 of the core surrounding member, ink can be supplied even when a writing load is applied to the ink supply core 50 from an oblique direction. As a result, the core 50 can be easily moved backward.

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 projecting position is formed so that the dimension by which it protrudes from the tip portion 23 of the core surrounding member is 100% or more of the diameter of the ink supply core 50. . That is, in FIG. 3A, the length of the tip portion of the ink supply core 50 protruding from the tip portion 23 of the core surrounding member is longer than the diameter of the ink supply core 50 . Specifically, since the diameter of the ink supply core 50 in this embodiment is 0.8 mm, the dimension by which the tip portion of the ink supply core 50 at the projecting position protrudes from the tip portion 23 of the core surrounding member is 0.8 mm. 8 mm or more is sufficient. In addition, it is desirable that the dimension by which the tip portion of the ink supply core 50 protrudes from the tip portion 23 of the core surrounding member at this projecting position is 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 instrument 1)
In the writing instrument 1 according to the present embodiment, the displacement member 30 is composed of three members, and the characteristic is that the peripheral member 32 and the central member 31 are the same primary molded body, but are continuous with each other as the primary molded body. Therefore, the elastic member 33 is deformed in the vicinity of the connecting portion 33b, and the displacement member 30 is easily bent.
Therefore, as shown in FIG. 3B, when the displacement member 30 is bent by the writing pressure, the relative positional relationship between the ink supply core 50 and the core surrounding member 20 is displaced, and the ink supply core 50 is moved to the retracted position. 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 applied to the ink supply core 50 is weakened by reducing the writing load, the elastic action of the displacement member 30 returns the bent shape to the initial shape. Accordingly, the ink supply core 50 also returns to the projecting position.
In addition, a large writing load is applied to the ink supply core 50, and when the ink supply core 50 is moved to the retracted position, the core peripheral member 20 receives the writing load instead of the ink supply core 50. , the ink supply core 50 can be prevented from being broken or crushed. Furthermore, since the ink supply lead 50 is covered with the core surrounding member 20, even if the writing instrument 1 is hit or the writing instrument 1 is impacted by being dropped, the ink supply lead 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 addition, in the writing instrument 1 according to the present embodiment, when a large writing load is applied to the ink supply lead 50 in the rear direction, the ink supply lead 50 moves to the retracted position due to the elastic action of the displacement member 30, and the circumference of the lead is increased. If the projection distance of the ink supply core 50 from the tip of the member 20 becomes small, it becomes impossible to draw a smooth and thin line. Therefore, when the ink supply core 50 is in the retracted position, the user must reduce the writing load and move the ink supply core 50 to the protruded position by the elastic action of the displacement member 30 in order to draw a fine line. Is required. Then, when the writing load is reduced and the ink supply core 50 moves again to the projecting position due to the elastic action of the displacement member 30, the projecting distance of the ink supply core 50 from the tip of the core surrounding member 20 increases. , 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。 Furthermore, in the present embodiment, the ink supply core 50 is made of a resin material, and the core surrounding member 20 is made of polyacetal. As a result, the coefficient of friction between the ink supply lead 50 and the core surrounding member 20 can be reduced, and the ink supply lead 50 can smoothly move backward, so that a large writing load is applied to the ink supply lead 50 from an oblique angle. Even in such a case, 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 instrument 1 according to the second embodiment includes a substantially cylindrical barrel 10, a tail plug 19 attached to the rear end of the barrel 10, It has an appearance including a core peripheral member 20 partially protruding from the tip and an ink supply core 50 partially protruding from the tip of the core peripheral member 20. As shown in FIG. The distal end side of the barrel 10 is a diameter-reduced portion 10a at the distal end of the barrel, the diameter of which 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。
(Axle 10)
In the writing instrument 1 according to the present embodiment, as shown in FIG. 6(B), the internal space of the barrel 10 is the ink tank 13, which is filled with cotton 18 made of polyester fiber. The padding 18 is impregnated with water-based ink. A substantially disk-shaped core penetrating member 60 having a through hole in the center is engaged with the tip of the ink tank 13 . A tail plug 19 is inserted from the rear end of the barrel 10 . The tip of tail plug 19 is in contact with the rear end of batting 18 . That is, the batting 18 is supported by the core penetrating member 60 at its tip and by the tip of the tail plug 19 at its rear end. The displacement member 30 is positioned in front of the core penetrating member 60, and the core surrounding member 20 is positioned in front thereof. A part of the core surrounding member 20 is exposed from the tip of the barrel 10 as described above. The displacement member 30 is composed of a substantially cylindrical moving member 36 and an elastic member 33 composed of a spring externally inserted therein. The details of the structures of the core surrounding member 20 and the displacement member 30 will be described later. A rod-shaped ink supply core 50 is pierced in the front end 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 surrounding member 20, and has its tip exposed from the tip of the core surrounding member 20. As shown in FIG.

(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 surrounding member 20 includes a cylindrical rear columnar portion 26, an intermediate flange portion 27 positioned in front of it and expanding in diameter outward, and a flange portion 27 positioned in front of it and gradually decreasing in diameter. and a reduced diameter portion 28 at the tip. More specifically, the intermediate flange portion 27 is composed of a rear tapered surface 27a tapered forward and tapered forward and a forward tapered surface 27b located in front of the tapered front tapered surface 27b. Become. Further, more specifically, the distal end reduced diameter portion 28 includes a first reduced diameter portion 28a gradually reduced in diameter toward the front and a second reduced diameter portion 28a located in front of the first reduced diameter portion 28a and further rapidly reduced in diameter toward the front. It consists of a portion 28b and a third diameter-reduced portion 28c which is located in front of the portion 28b and whose diameter is again gradually reduced forward to the tip. Also, on the side surface of the core peripheral member 20, two locations opposite to each other across the axis are formed by scraping off the rear portion of the first diameter-reduced portion 28a and cutting out the intermediate flange portion 27 and the rear cylindrical portion 26 for ventilation. It is formed as a groove 29 . When the ink supply core 50 is in the projecting position, the gap 29a formed between the ventilation groove 29 and the opening at the tip of the barrel 10 allows the inside and outside of the barrel 10 to be ventilated (see FIG. 10). . Here, this core surrounding 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。 A hole penetrates through the core surrounding member 20 from its rear end to its 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 smaller diameter inner peripheral portion beyond that is the front insertion hole 25. As shown in FIG.

(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 fitted thereto. As shown in FIG. 8, the moving member 36 has a cylindrical intermediate columnar portion 36b, a rear end flange portion 36c having a flange-like enlarged diameter at the rear end of the intermediate columnar portion 36b, and a reduced diameter at the front end side of the intermediate columnar portion 36b. and a tip cylindrical portion 36a. Notch portions 36d are formed by notching two circular arc portions facing each other across the axis on the circumference of the rear end flange portion 36c.

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 fitted over 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 leading end 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. In addition, the space in front of the displacement member accommodating portion 10b is a shaft cylinder reduced diameter portion 10d having a diameter reduced with a step 10c. The inner diameter of the reduced diameter portion 10d of the barrel is smaller than the outer diameter of the elastic member 33. As shown in FIG. The tip of the elastic member 33 is supported by this step 10c. The inner diameter of the distal end portion of the reduced diameter portion 10d of the barrel is slightly expanded, and this portion serves as the distal end hole 10e of the barrel.

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。 In the state where the ink supply core 50 is in the projecting position as shown in FIG. It is located inside the tip hole 10e. Then, 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 surrounding member 20 and fixed at a position straddling the step 10c. Further, in the projecting state, the rearward 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, slidably penetrates the front insertion hole 25, and reaches the tip of the third reduced diameter portion 28c. 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。
(Description of deflection of displacement member 30)
In the projecting 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 shown in FIG. 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. FIG. 10 is a perspective view showing this state, in which the tip of the ink supply core 50 maintains a state of protruding relative to the core surrounding member 20. As shown in FIG.

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 wick 50 is rarely pressed perpendicularly to the writing surface, and is often pressed obliquely at some angle. In this case, the ink supply core 50 is flexed by pressurization, and the force generated by this flexion causes the rearward tapered surface 27a of the intermediate flange portion 27 on the side opposite to the writing surface with the ink supply core 50 interposed therebetween. 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. Accordingly, as shown in FIG. 11, the core surrounding member 20 is inclined with respect to the barrel. Accordingly, the moving member 36 fixed to the core surrounding member 20 is similarly tilted and separated from the end surface of the core penetrating member 60 . As the core surrounding member 20 moves toward the tip, the tip of the ink supply core 50 enters a state of being relatively retracted with respect to the core surrounding member 20 (hereinafter referred to as a "recessed 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 removed from the surface of the paper from this immersed state, the pressure on the ink supply core 50 is released, the elastic member 33 is restored, and the core peripheral member 20 is also retreated into the reduced diameter portion 10a at the tip of the barrel. , and returns to the projecting state shown in FIGS.

(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。
(others)
In the second embodiment, the spring as the elastic member 33 is compressed by applying pressure to the writing tip, but it 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 kept apart from each other, and these members are connected by a natural length spring as the elastic member 33 interposed therebetween. can be made to be By doing so, the moving member 36 can always be pulled backward 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 writing instrument
10 barrel
10a Reduced diameter portion at tip of barrel 10b Displacement member accommodation portion
10c Step 10d Diameter reduction part
10e Axle tip hole
11 Front axle 12 Rear axle
13 Ink tank 14 Rear of front axle
15 Front barrel flange
16 Front of tip
16a Diameter reduction hole in front of front barrel 16b Insertion hole for peripheral member
17 Grip member 18 Filling
19 tail plug
20 core surrounding member 21 core surrounding member fixing part
22 Tapered portion of the core surrounding member 23 Tip of the core surrounding member
24 Rear insertion hole 25 Front insertion hole
26 rear column
27 Intermediate flange
27a Backward tapered surface 27b Forward tapered surface
28 Tip reduced diameter part
28a First reduced diameter portion 28b Second reduced diameter portion
28c third reduced diameter part
29 Ventilation groove 29a Gap
30 displacement member
31 Central member
31a rear insertion hole 31c front insertion hole
31d Rear part of rear column 31e Central member flange
31f Front part of rear cylinder part 31g Middle cylinder part
31h forward column
32 Peripheral material
32a Inner peripheral surface 32b Inner projection of peripheral member
32c Rear peripheral part of peripheral member 32d Middle peripheral part of peripheral member
32e Surrounding member front outer peripheral part 32f Surrounding member outward projection
33 elastic member
33a Elastic member rear cylindrical part 33b Connecting part
33c Resilient member forward cone
34 Cavity 35 Inward projection
36 Moving member
36a Tip Cylindrical Part 36b Intermediate Cylindrical Part
36c Rear end flange 36d Notch
40 collector 41 collector wick
50 Ink supply core 51 Coating member
60 core penetrating member

Claims (1)

本願明細書に記載の発明。
The invention described herein.
JP2023008400A 2015-10-19 2023-01-23 writing implements Active JP7454718B2 (en)

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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

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JPH058155Y2 (en) * 1987-03-09 1993-03-01
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
JP5827675B2 (en) * 2013-12-26 2015-12-02 ゼブラ株式会社 Writing instrument
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JP2017077730A (en) 2017-04-27
JP2021035778A (en) 2021-03-04

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