JPH06247095A - Writing instrument - Google Patents
Writing instrumentInfo
- Publication number
- JPH06247095A JPH06247095A JP5062648A JP6264893A JPH06247095A JP H06247095 A JPH06247095 A JP H06247095A JP 5062648 A JP5062648 A JP 5062648A JP 6264893 A JP6264893 A JP 6264893A JP H06247095 A JPH06247095 A JP H06247095A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- vapor pressure
- storage chamber
- case
- inner case
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Pens And Brushes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ホワイトボードマーカ
ーやフェルトチップペン等の筆記具に関し、特に、温度
や気圧変化等の雰囲気の影響を受けることなく常に良好
な筆記状態を可能とした筆記具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing instrument such as a whiteboard marker and a felt tip pen, and more particularly to a writing instrument which can always achieve a good writing state without being affected by an atmosphere such as a change in temperature or atmospheric pressure.
【０００２】[0002]
【従来の技術】ホワイトボードマーカー等の筆記具で
は、ケーシング内に中綿等の多孔性材料を充填し、この
多孔性材料にインクを毛細管の作用により保持させてい
たが、保持できるインクの量が少なくなってしまうとと
もに、素早く筆記をすると、多孔性材料から芯先へのイ
ンクの供給量が少なくなって、筆跡がかすれる等の不具
合があった。
2. Description of the Related Art In a writing instrument such as a whiteboard marker, a casing is filled with a porous material such as batting, and the ink is retained in the porous material by the action of a capillary tube. However, the amount of ink that can be retained is small. In addition, when writing quickly, there was a problem that the amount of ink supplied from the porous material to the tip of the core decreased and the handwriting was faint.
【０００３】
このため、特開平３−１３３９６号公報に関係されて
いるように、筒状に形成したケーシング内に直接インク
を注入してインク貯蔵室を形成し、このインク貯蔵室内
にインクと空気とを区画する摺動自在なスライド栓を挿
入するとともに、インク貯蔵室の先端に配設したペン体
との間に、ペン体方向のみインクの流れを許容する弁座
を有する筒状の弁体を配設し、さらに、弁体とペン体と
の間に副インク室を形成した筆記具が提案されている。[0003]
Therefore, as related to JP-A-3-13396, ink is directly injected into a cylindrical casing to form an ink storage chamber, and the ink storage chamber is divided into ink and air. A slidable slide plug is inserted, and a cylindrical valve body having a valve seat that allows ink flow only in the pen body direction is arranged between the pen body and the pen body arranged at the tip of the ink storage chamber. Further, a writing instrument has been proposed in which a sub ink chamber is formed between the valve body and the pen body.
【０００４】[0004]
【発明が解決しようとする課題】この構成における筆記
具では、多孔性材料が除去されているのでインク貯蔵室
内に多量のインクを保持することができ、また、筆記に
よるインク消費量に応じてインク貯蔵室内をスライド栓
が摺動して弁体を開弁し、消費したインク分量をペン体
に供給するので、筆跡がかすれることがないという利点
がある。In the writing instrument of this structure, since the porous material is removed, a large amount of ink can be held in the ink storage chamber, and the ink storage is dependent on the amount of ink consumed by writing. Since the slide plug slides inside the chamber to open the valve element and the consumed ink amount is supplied to the pen element, there is an advantage that handwriting is not blurred.
【０００５】しかしながら、この筆記具を気温の高い場
所に放置したり、輸送に際して気圧が変化する状態に置
かれると、インク貯蔵室内のインク成分中の揮発分が蒸
発し、この蒸気圧によりスライド栓を尾栓側に押し上げ
てしまい、常温や大気圧に戻った際に、スライド栓が初
期に在った位置に戻らずに移動した位置に留まったまま
の状態となり、インクとスライド栓との境界に留まった
空気及び蒸発分がスライド栓の摺動を押えてインクの供
給をやめ、筆記ができなくなるという不都合が生じる。However, if this writing instrument is left in a place where the temperature is high, or if the atmospheric pressure is changed during transportation, volatile components in the ink components in the ink storage chamber evaporate, and this vapor pressure causes the slide stopper to move. When it was pushed up to the tail plug side and returned to room temperature or atmospheric pressure, the slide stopper did not return to the initial position but remained in the moved position, and at the boundary between the ink and the slide stopper. The remaining air and the evaporated portion press the sliding of the slide stopper to stop the supply of ink, which causes a problem that writing cannot be performed.
【０００６】尚、尾栓には空気孔が穿設され、筆記に伴
なうインクの消費によるスライド栓の下降作用を補償し
ている。The tail plug is provided with an air hole to compensate for the lowering action of the slide plug due to ink consumption associated with writing.
【０００７】そこで本発明は、この不都合を解消するた
めに気温が大きく変化したり気圧が変化したとしても、
スライド栓がインクの境界面から離れないようにした筆
記具を提供することを目的とする。Therefore, according to the present invention, in order to eliminate this inconvenience, even if the temperature changes greatly or the atmospheric pressure changes,
An object of the present invention is to provide a writing instrument in which the slide stopper does not separate from the boundary surface of the ink.
【０００８】[0008]
【課題を解決するための手段】この目的を達成するため
に本発明は、内部にインクが収納されるインク貯蔵室を
形成する筒状の内ケースと、前記内ケースの前方に装着
され軸方向に摺動自在なペン体と、前記内ケースの内部
に設けられ、前記インク貯蔵室と前記ペン体との間を遮
断し、ペン体が内ケースの内部に圧入された時にインク
貯蔵室とペン体とを連通させるダイアフラム部材と、前
記内ケース内に配設されインク貯蔵室と大気とを区画し
摺動自在なスライド栓と、前記内ケースを覆う筒状の外
ケースと、前記ペン体の先端を覆い外ケースに嵌合され
るキャップと、を備え、インク貯蔵室のインクの蒸気圧
が上昇した際に、スライド栓の大気側の圧力を上昇させ
る蒸気圧発生部材を外ケースの空間内部に配設するよう
にした。To achieve this object, the present invention is directed to a cylindrical inner case that forms an ink storage chamber for accommodating ink therein, and an axial direction that is mounted in front of the inner case. And a pen body which is slidable in the inner case and which is provided inside the inner case, blocks the ink storage chamber and the pen body, and when the pen body is press-fitted into the inner case, the ink storage chamber and the pen body A diaphragm member that communicates with the body, a slide stopper that is disposed in the inner case and divides the ink storage chamber from the atmosphere and is slidable, a cylindrical outer case that covers the inner case, and a pen body. A cap that covers the tip and is fitted to the outer case, and a vapor pressure generating member that raises the pressure on the atmosphere side of the slide stopper when the vapor pressure of the ink in the ink storage chamber rises, inside the space of the outer case. It was arranged to.
【０００９】[0009]
【作用】筆記具が高温等の雰囲気中に置かれると、イン
ク貯蔵室のインク成分中の蒸発物が雰囲気に比例して蒸
発する。この蒸気は、インク貯蔵室の一方がダイアフラ
ム部材で遮断されているため、必然的に他方の摺動自在
なスライド栓に作用してスライド栓を外側へ押し上げよ
うと働く。しかしながら、外ケースの空間内部に配設し
た蒸気圧発生部材にも同時に雰囲気が作用し、蒸気圧発
生部材から蒸気が発生する。この圧力は密閉された外ケ
ースの空間から外部に逃げることができず、摺動自在な
スライド栓に作用し、スライド栓をインク貯蔵室側に押
し下げようと働く。When the writing instrument is placed in an atmosphere of high temperature or the like, the evaporation material in the ink components in the ink storage chamber evaporates in proportion to the atmosphere. Since one of the ink storage chambers is blocked by the diaphragm member, the vapor inevitably acts on the other slidable slide plug to push the slide plug outward. However, the atmosphere simultaneously acts on the vapor pressure generating member arranged inside the space of the outer case, and vapor is generated from the vapor pressure generating member. This pressure cannot escape to the outside from the space of the sealed outer case, and acts on the slidable slide plug to push down the slide plug to the ink storage chamber side.
【００１０】従って、スライド栓の両側から作用する圧
力は相殺されて、インクとスライド栓との境界に空間が
形成されず、通常の雰囲気に戻った後も良好な筆記状態
を持続する。Therefore, the pressures acting from both sides of the slide stopper are canceled out, a space is not formed at the boundary between the ink and the slide stopper, and a good writing state is maintained even after returning to a normal atmosphere.
【００１１】[0011]
【実施例】図１に示す本発明に係る筆記具１は、インク
貯蔵室３を形成する内ケース２と、該内ケース２の一方
端に配設されたペン体４と、内ケース２の他方側の内部
にインクと空気とを区画する摺動自在なスライド栓５
と、内ケース２内部に配設されペン体４とインク貯蔵室
３との間の通路を開閉するダイアフラム部材６と、内ケ
ース２を覆う外ケース７と、ペン体４を覆い外ケース７
に嵌合されるキャップ８とからなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A writing instrument 1 according to the present invention shown in FIG. 1 includes an inner case 2 forming an ink storage chamber 3, a pen body 4 arranged at one end of the inner case 2, and the other side of the inner case 2. Slidable slide stopper 5 for partitioning ink and air inside the side
A diaphragm member 6 disposed inside the inner case 2 for opening and closing a passage between the pen body 4 and the ink storage chamber 3, an outer case 7 for covering the inner case 2, and an outer case 7 for covering the pen body 4.
And a cap 8 fitted to the.
【００１２】内ケース２は、例えば、ポリプロピレン等
の合成樹脂で成形された適宜の長さを有する透明な円筒
状を呈し、一端に筆記部分となるペン体４が配設され他
端からスライド栓５が挿入されて、該スライド栓５とペ
ン体４との間にインクを貯蔵するインク貯蔵室３が形成
される。The inner case 2 is formed of, for example, a synthetic resin such as polypropylene and has a transparent cylindrical shape having an appropriate length. A pen body 4 serving as a writing portion is provided at one end and a slide stopper is provided from the other end. 5 is inserted, and an ink storage chamber 3 for storing ink is formed between the slide stopper 5 and the pen body 4.
【００１３】内ケース２の前方に配設されたペン体４
は、繊維を高密度に固めた芯９と、該芯９を保持し内ケ
ース２の先端内を摺動自在な芯ホルダー１０と、該芯ホ
ルダー１０の中央の軸方向に穿設された中心穴１１とか
らなり、中心穴１１の先端開口に芯９が挿入され、細径
にインク貯蔵室３側に突出した芯ホルダー１０の後端近
傍の側壁に中心穴１１と連通し、且つ、軸線と直交する
方向に孔部１２が穿設されている。A pen body 4 arranged in front of the inner case 2.
Is a core 9 in which fibers are hardened at a high density, a core holder 10 that holds the core 9 and is slidable inside the tip of the inner case 2, and a center provided in the center of the core holder 10 in the axial direction. The core 9 is inserted into the front end opening of the center hole 11 and communicates with the center hole 11 on the side wall near the rear end of the core holder 10 that projects to the ink storage chamber 3 side in a small diameter, and the axis line. The hole 12 is formed in a direction orthogonal to the direction.
【００１４】前記芯ホルダー１０の細径後端部を囲繞し
て、合成ゴム等の弾性部材からなるダイアフラム部材６
が内ケース２に固着され、ダイアフラム部材６の中心の
内周壁が孔部１２を塞いでいる。A diaphragm member 6 which surrounds the small-diameter rear end portion of the core holder 10 and is made of an elastic member such as synthetic rubber.
Is fixed to the inner case 2, and the inner peripheral wall at the center of the diaphragm member 6 closes the hole 12.
【００１５】 内ケース２の後方に、該内ケース２内を
軸方向に摺動自在に配設されたスライド栓５は、シリコ
ンゴム等の弾性部材で形成され若干の載頭円錐状を呈
し、底部に内壁面と接する環状のシール部１３が成形さ
れ、該シール部１３がインク貯蔵室３と空気とを遮断し
て液密を保つ。そして、スライド栓５の後方の内ケース
２周壁面にパラフィン等の潤滑材が塗布され、スライド
栓５の摺動を容易にする。A slide plug 5, which is disposed rearward of the inner case 2 so as to be slidable in the inner case 2 in the axial direction, is formed of an elastic member such as silicon rubber and has a slightly truncated cone shape. An annular seal portion 13 that contacts the inner wall surface is formed on the bottom portion, and the seal portion 13 blocks the ink storage chamber 3 from the air to maintain liquid tightness. Then, a lubricant such as paraffin is applied to the peripheral wall surface of the inner case 2 behind the slide stopper 5 to facilitate sliding of the slide stopper 5.
【００１６】前記内ケース２の外周に空間が形成される
ように断面が三角形状の透明な筒状の外ケース７が配設
される。該外ケース７の先端は内ケース２の先端近傍に
嵌着され、この嵌着部分に軸方向に沿って複数の空気通
路１４が画成されて、外ケース７の空間と大気とを連通
している。また、外ケース７の端部にはパッキン１５を
介して尾栓１６が気密に取着されている。A transparent tubular outer case 7 having a triangular cross section is arranged so that a space is formed on the outer circumference of the inner case 2. The tip of the outer case 7 is fitted in the vicinity of the tip of the inner case 2, and a plurality of air passages 14 are defined in the fitted portion along the axial direction to communicate the space of the outer case 7 with the atmosphere. ing. A tail plug 16 is airtightly attached to the end of the outer case 7 via a packing 15.
【００１７】 ペン体４を
覆い外ケース７の先端に嵌合するキャップ８は、内周壁
１７を具備する二重構造を呈し、キャップ８を被冠した
場合に、内周壁１７先端と内ケース２の先端及び外周壁
１８と外ケース７の先端とが夫々密接して、芯９の先端
からの蒸発を防ぐとともに、外ケース７内の空間と外周
壁１８内の空間を空気通路１４を介して連通させてい
る。The cap 8 that covers the pen body 4 and fits at the tip of the outer case 7 has a double structure including the inner peripheral wall 17, and when the cap 8 is capped, the tip of the inner peripheral wall 17 and the inner case 2 are covered. And the outer peripheral wall 18 and the outer case 7 are in close contact with each other to prevent evaporation from the tip of the wick 9, and the space in the outer case 7 and the space in the outer peripheral wall 18 through the air passage 14. It is in communication.
【００１８】
そして、スライド栓５の外側の内ケース
２端部に蒸気圧発生部材１９が配設される。該蒸気圧発
生部材１９は、繊維を圧縮して円柱状に成形した繊維体
に雰囲気温度や気圧に応じて蒸気圧が変化する。例え
ば、エチルアルコールのようなアルコール系の液体が含
浸されている。繊維体の外周壁には軸方向に画成された
溝が複数本設けてある。[0018]
Then, the vapor pressure generating member 19 is arranged at the end of the inner case 2 outside the slide stopper 5. In the vapor pressure generating member 19, the vapor pressure of a fibrous body formed by compressing fibers into a cylindrical shape changes depending on the ambient temperature and atmospheric pressure. For example, an alcohol-based liquid such as ethyl alcohol is impregnated. The outer peripheral wall of the fibrous body is provided with a plurality of axially defined grooves.
【００１９】以上のような構成からなる筆記具１の作用
を詳細に説明する。The operation of the writing instrument 1 having the above structure will be described in detail.
【００２０】キャップ８を外して芯９の先端を筆面に押
圧すると、筆圧によって芯ホルダー１０が内ケース２の
内部に指向して摺動し、芯ホルダー１０の細径後端部分
によってダイアフラム部材６をインク貯蔵室３側に押し
曲げると共に、インク貯蔵室３を加圧してスライド栓５
を尾栓１６側に若干摺動させる。更に筆圧が加わると芯
ホルダー１０端部の孔部１２がダイアフラム部材６の内
周壁から離間し、インク貯蔵室３と孔部１２とが連通し
て加圧されたインク貯蔵室３からインクが中心穴１１を
経て芯９に流入する。そして、インクの減少によってス
ライド栓５がインク貯蔵室３内をペン体４側に摺動す
る。When the cap 8 is removed and the tip of the lead 9 is pressed against the writing surface, the writing pressure causes the lead holder 10 to slide toward the inside of the inner case 2, and the small-diameter rear end portion of the lead holder 10 causes the diaphragm to move. The member 6 is pushed and bent toward the ink storage chamber 3 side, and the ink storage chamber 3 is pressed to slide the slide stopper 5
Is slightly slid to the tail plug 16 side. When the writing pressure is further applied, the hole 12 at the end of the lead holder 10 is separated from the inner peripheral wall of the diaphragm member 6, and the ink is stored in the ink storage chamber 3 pressurized by the communication between the ink storage chamber 3 and the hole 12. It flows into the core 9 through the center hole 11. Then, due to the decrease in the ink, the slide plug 5 slides in the ink storage chamber 3 toward the pen body 4.
【００２１】インク貯蔵室３内のインクの減少によって
スライド栓５がペン体４側に摺動すると、外ケース７に
画成した空気通路１４から空気が外ケース７の空間に入
り、スライド栓５の尾栓１６側の負圧を解除する。そし
て、筆圧が解除されると、ダイアフラム部材６の弾発力
で芯ホルダー１０を前方に摺動させて初期状態にし、孔
部１２をダイアフラム部材６の内周壁に密着させてイン
クの流通を止める。When the slide plug 5 slides toward the pen body 4 due to the decrease of the ink in the ink storage chamber 3, air enters the space of the outer case 7 from the air passage 14 defined in the outer case 7, and the slide plug 5 The negative pressure on the side of the tail plug 16 is released. Then, when the writing pressure is released, the core holder 10 is slid forward by the elastic force of the diaphragm member 6 to the initial state, and the hole portion 12 is brought into close contact with the inner peripheral wall of the diaphragm member 6 to allow the ink to flow. stop.
【００２２】筆記終了後にキャップ８を被冠すると、キ
ャップ８の内周壁１７は内ケース２の先端と嵌合して芯
９部分を密封し、芯９先端からのインク揮発分の蒸発を
飽和すると共に、外周壁１８が外ケース７と嵌合して、
外ケース７の空間の空気を密封する。従って、筆記具が
高温の場所に放置された時や、輸送時に減圧や高温に曝
された時には、インク貯蔵室３内のインクが熱膨張及び
インク成分中の揮発分の蒸発によりスライド栓５を尾栓
１６側に押す力が作用する。しかしながら同時に、内ケ
ース２端部に配設された蒸気圧発生部材１９から温度に
応じたエチルアルコールの蒸気圧が外ケース７の空間に
生じ、その圧力がスライド栓５をインク貯蔵室３に向っ
て押すので、圧力が平衡してスライド栓５が動くことな
く、常に筆記可能状態を維持する。When the cap 8 is capped after the writing is finished, the inner peripheral wall 17 of the cap 8 is fitted with the tip of the inner case 2 to seal the portion of the core 9, and the evaporation of the ink volatile matter from the tip of the core 9 is saturated. At the same time, the outer peripheral wall 18 is fitted to the outer case 7,
The air in the space of the outer case 7 is sealed. Therefore, when the writing instrument is left in a high temperature place or is exposed to reduced pressure or high temperature during transportation, the ink in the ink storage chamber 3 is thermally expanded and the slide stopper 5 is tailed by evaporation of volatile components in the ink component. A pushing force acts on the plug 16 side. However, at the same time, a vapor pressure of ethyl alcohol corresponding to the temperature is generated in the space of the outer case 7 from the vapor pressure generating member 19 arranged at the end of the inner case 2, and the pressure causes the slide stopper 5 to move toward the ink storage chamber 3. Since the pressure is balanced, the slide stopper 5 does not move and the writing enabled state is always maintained.
【００２３】更に詳しく蒸気圧発生部材１９からの蒸気
圧と、インク貯蔵室３からの圧力とによるスライド栓５
にかかる加圧状態について述べると、図２ａに示すよう
に常温時にはスライド栓５に０．０６５Kg／cm2 の静摩
擦力が生じており、インク貯蔵室３内のインクからのイ
ンク蒸気圧は、アントワンの式から０．０６Kg／cm2な
るので、インク貯蔵室３内のインク蒸気圧よりもスライ
ド栓５の静摩擦力の方が大きく、摺動を始めることはな
い。More specifically, the slide stopper 5 is formed by the vapor pressure from the vapor pressure generating member 19 and the pressure from the ink storage chamber 3.
2A, a static friction force of 0.065 kg / cm 2 is generated in the slide stopper 5 at room temperature as shown in FIG. 2A, and the ink vapor pressure from the ink in the ink storage chamber 3 is Since 0.06 Kg / cm 2 is obtained from the equation, the static frictional force of the slide plug 5 is larger than the ink vapor pressure in the ink storage chamber 3, and the sliding does not start.
【００２４】雰囲気温度が２０℃から５０℃に上昇する
と、図２ｂに示すように、インク貯蔵室３のインクは前
記アントワンの式から０．３Kg／cm2 の蒸気圧が発生す
る。一方、外ケース７の空間内の空気も膨張し、ボイル
ーシャルルの式により０．１０Kg／cm2 の圧力増となる
と共に、内ケース２に配設された蒸気圧発生部材１９に
含浸したエチルアルコールもアントワンの式により０．
３０Kg／cm2 の蒸気圧が発生する。従って、インク貯蔵
室３のインクの蒸気圧と蒸気圧発生部材１９の蒸気圧が
相殺されてスライド栓５が尾栓１６側に摺動することが
なく、併せてインクからの気泡の発生も防止される。[0024] ambient temperature rises from 20 ° C. to 50 ° C., as shown in Figure 2b, the ink in the ink storage chamber 3 is vapor pressure of 0.3 Kg / cm 2 from the equation of the Antoine occurs. On the other hand, the air in the space of the outer case 7 also expands, resulting in a pressure increase of 0.10 Kg / cm 2 according to the Boyle-Charles equation, and the ethyl resin impregnated into the vapor pressure generating member 19 disposed in the inner case 2 is impregnated. Alcohol is 0. according to Antoine's formula.
A vapor pressure of 30 kg / cm 2 is generated. Therefore, the vapor pressure of the ink in the ink storage chamber 3 and the vapor pressure of the vapor pressure generating member 19 do not cancel each other and the slide plug 5 does not slide toward the tail plug 16 side, and at the same time, the generation of bubbles from the ink is prevented. To be done.
【００２５】尚、筆記する際にキャップ８を外すことに
より、外ケース７の空間の高くなっている圧力は空気通
路１４から大気に放出されるので、筆圧によりダイアフ
ラム部材６が変形しインク貯蔵室３と芯９とが連通して
も、インクが余分に押し出されることがない。By removing the cap 8 during writing, the increased pressure in the space of the outer case 7 is released from the air passage 14 to the atmosphere, so that the diaphragm member 6 is deformed by the writing pressure and ink is stored. Even if the chamber 3 and the core 9 communicate with each other, the ink is not excessively pushed out.
【００２６】図３に示す筆記具は本発明の第２の実施例
であり、第１の実施例と同一の構成には同一の参照符号
を付し詳細な説明を省略する。The writing instrument shown in FIG. 3 is the second embodiment of the present invention, and the same components as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.
【００２７】本実施例においては、繊維を圧縮して所定
の直径と長さとに成形した円柱状の蒸気圧発生部材２０
を、尾栓１６に成形した凹部２１内に配設している。In the present embodiment, a columnar vapor pressure generating member 20 is formed by compressing fibers into a predetermined diameter and length.
Is disposed in the recess 21 formed in the tail plug 16.
【００２８】この場合においても第１実施例と同様に、
温度上昇による蒸気圧発生部材２０から発生する蒸気圧
によって、インク貯蔵室３内のインク蒸発分の圧力によ
るスライド栓５の摺動を抑えることができるとともに、
蒸気圧発生部材２０を簡単に取り付けることができる。Also in this case, as in the first embodiment,
By the vapor pressure generated from the vapor pressure generating member 20 due to the temperature rise, it is possible to suppress the sliding of the slide plug 5 due to the pressure of the amount of ink evaporated in the ink storage chamber 3, and
The vapor pressure generating member 20 can be easily attached.
【００２９】図４に示す第３の実施例においては、繊維
あるいは発泡部材を円筒状に形成しエチルアルコールを
含浸させた蒸気圧発生部材２２を、キャップ８の内周壁
１７と外周壁１８との間の空間に挿入している。蒸気圧
発生部材２２から発生した蒸気圧は、外ケース７と内ケ
ース２との嵌着部分に画成した空気通路１４より外ケー
ス７内の空間に伝達し、スライド栓５をペン体４側に押
圧するとともに、蒸発面積が少なくて済み長時間の使用
に耐えられるという効果を有する。In the third embodiment shown in FIG. 4, a vapor pressure generating member 22 in which a fiber or foam member is formed in a cylindrical shape and impregnated with ethyl alcohol is provided between the inner peripheral wall 17 and the outer peripheral wall 18 of the cap 8. It is inserted in the space between. The vapor pressure generated from the vapor pressure generating member 22 is transmitted to the space inside the outer case 7 through the air passage 14 defined in the fitting portion between the outer case 7 and the inner case 2, and the slide plug 5 is moved to the pen body 4 side. In addition to pressing, it has the effect that the evaporation area is small and can be used for a long time.
【００３０】尚、蒸気圧発生部材１９、２２に含浸され
る液体としては、エチルアルコールの他、メチルアルコ
ール、イソプロピルアルコール等のアルコール系溶剤が
適している。As the liquid with which the vapor pressure generating members 19 and 22 are impregnated, not only ethyl alcohol but also alcohol solvents such as methyl alcohol and isopropyl alcohol are suitable.
【００３１】更に、図５に示す第４の実施例において
は、蒸気圧発生部材としてアルコール系溶剤と同じ蒸気
圧を有する、結晶剤２３をスライド栓５の尾栓１６側の
凹部に配設している。Further, in the fourth embodiment shown in FIG. 5, the crystallizing agent 23 having the same vapor pressure as the alcohol solvent as the vapor pressure generating member is disposed in the recess on the tail plug 16 side of the slide stopper 5. ing.
【００３２】本実施例の場合は、雰囲気温度の変化につ
れて結晶剤２３が昇華して外ケース７内の空間の圧力を
高め、スライド栓５の摺動を防ぐとともに、簡単に組立
てることができる。In the case of the present embodiment, the crystallizing agent 23 sublimes as the ambient temperature changes, increasing the pressure in the space inside the outer case 7, preventing the slide stopper 5 from sliding, and assembling it easily.
【００３３】[0033]
【発明の効果】以上のように本発明の筆記具は、ダイア
フラム部材とスライド栓との間に、インク貯蔵室を形成
した内ケースの外周に空間を形成させて外ケースを嵌着
し、キャップを被冠させるとともに、前記外ケース内の
空間に蒸気圧発生部材を配設したので、温度変化等の雰
囲気の変化によってインク貯蔵室内のインク蒸発分がス
ライド栓を尾栓側に押し上げようとしても、蒸気発生部
材も同時にインクの蒸気圧と同じ程度に蒸気圧を発生し
て外ケース内の空間の圧力を高め、スライド栓をペン体
側に押し下げて互の圧力を相殺させることができ、従っ
て、雰囲気が通常に戻った際に、インクとスライド栓の
境界に空間が生じることがなく、筆記不能を防止するこ
とができる。As described above, in the writing instrument of the present invention, a space is formed between the diaphragm member and the slide stopper on the outer periphery of the inner case in which the ink storage chamber is formed, and the outer case is fitted and the cap is attached. Since the vapor pressure generating member is arranged in the space inside the outer case while being crowned, even if the ink evaporation in the ink storage chamber pushes the slide stopper toward the tail plug side due to a change in the atmosphere such as a temperature change, At the same time, the vapor generating member also generates vapor pressure to the same extent as the vapor pressure of the ink to increase the pressure in the space inside the outer case, and the slide stopper can be pushed down to the pen body side to cancel each other's pressure. When the state returns to the normal state, no space is created at the boundary between the ink and the slide stopper, and the inability to write can be prevented.
【図１】本発明に係る筆記具の縦断面図である。FIG. 1 is a vertical sectional view of a writing instrument according to the present invention.
【図２】スライド栓の圧力変動を示す模式図である。FIG. 2 is a schematic diagram showing a pressure fluctuation of a slide stopper.
【図３】本発明に係る第２実施例の部分縦断面図であ
る。FIG. 3 is a partial vertical sectional view of a second embodiment according to the present invention.
【図４】本発明に係る第３実施例の部分縦断面図であ
る。FIG. 4 is a partial vertical sectional view of a third embodiment according to the present invention.
【図５】本発明に係る第４実施例の部分縦断面図であ
る。FIG. 5 is a partial vertical sectional view of a fourth embodiment according to the present invention.
１．筆記具 ２．内ケース ３．インク貯蔵室 ４．ペン体 ５．スライド栓 ６．ダイアフラム部材 ７．外ケース ８．キャップ １０．芯ホルダー １６．尾栓 １９，２０，２２．蒸気圧発生部材 ２３．結晶剤 1. Writing instrument 2. Inner case 3. Ink storage room 4. Pen body 5. Slide stopper 6. Diaphragm member 7. Outer case 8. Cap 10. Wick holder 16. Tail plug 19, 20, 22. Steam pressure generating member 23. Crystallizer
Claims (6)
を形成する筒状の内ケースと、 前記内ケースの前方に装着され軸方向に摺動自在なペン
体と、 前記内ケースの内部に設けられ、前記インク貯蔵室と前
記ペン体との間を遮断し、ペン体が内ケースの内部に圧
入された時にインク貯蔵室とペン体とを連通させるダイ
アフラム部材と、 前記内ケース内に配設されインク貯蔵室と大気とを区画
し摺動自在なスライド栓と、 前記内ケースを覆う筒状の外ケースと、 前記ペン体の先端を覆い外ケースに嵌合されるキャップ
と、 を備え、インク貯蔵室のインクの蒸気圧が上昇した際
に、スライド栓の大気側の圧力を上昇させる蒸気圧発生
部材を外ケースの空間内部に配設したことを特徴とする
筆記具。1. A cylindrical inner case that forms an ink storage chamber for accommodating ink therein, a pen body that is mounted in front of the inner case and is slidable in the axial direction, and inside the inner case. A diaphragm member, which is provided between the ink storage chamber and the pen body, connects the ink storage chamber and the pen body to each other when the pen body is press-fitted into the inner case, and is arranged in the inner case. A slide stopper that is slidable for partitioning the ink storage chamber from the atmosphere, a cylindrical outer case that covers the inner case, and a cap that covers the tip of the pen body and is fitted to the outer case. A writing instrument characterized in that a vapor pressure generating member that raises the pressure on the atmosphere side of the slide stopper when the vapor pressure of the ink in the ink storage chamber rises is provided inside the space of the outer case.
気側の内ケースの内部に配設したことを特徴とする請求
項１記載の筆記具。2. The writing instrument according to claim 1, wherein the vapor pressure generating member is arranged inside an inner case on the atmosphere side of the slide stopper.
空間に配設したことを特徴とする請求項１記載の筆記
具。3. The writing instrument according to claim 1, wherein the vapor pressure generating member is arranged in an inner space of the outer case.
覆うキャップの内部に配設したことを特徴とする請求項
１記載の筆記具。4. The writing instrument according to claim 1, wherein the vapor pressure generating member is provided inside a cap that covers the tip of the pen body.
剤を含有した繊維体であることを特徴とした請求項１か
ら請求項４いずれか１項記載の筆記具。5. The writing instrument according to claim 1, wherein the vapor pressure generating member is a fibrous body containing an alcohol solvent.
等の蒸気圧を発生する結晶剤であることを特徴とする請
求項１記載の筆記具。6. The writing instrument according to claim 1, wherein the vapor pressure generating member is a crystallizing agent that generates vapor pressure equivalent to that of alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5062648A JPH06247095A (en) | 1993-02-26 | 1993-02-26 | Writing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5062648A JPH06247095A (en) | 1993-02-26 | 1993-02-26 | Writing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06247095A true JPH06247095A (en) | 1994-09-06 |
Family
ID=13206365
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5062648A Pending JPH06247095A (en) | 1993-02-26 | 1993-02-26 | Writing instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06247095A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169197A (en) * | 2018-11-10 | 2020-05-19 | 迈博高分子材料（宁波）有限公司 | Scribble instrument of writing |
-
1993
- 1993-02-26 JP JP5062648A patent/JPH06247095A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111169197A (en) * | 2018-11-10 | 2020-05-19 | 迈博高分子材料（宁波）有限公司 | Scribble instrument of writing |
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