JP2008006661A - Retractable writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retractable writing utensil, in which its penpoint can be tightly closed at the time when the penpoint is retracted even if what kind of the penpoint is employed, the ink in an ink tank can be prevented from evaporating even after the long term storage under the state that the penpoint is retracted and, even under the condition that the pressure in the ink tank rises under the state that the penpoint is retracted, the ink can be prevented from leaking outside. <P>SOLUTION: A writing body 3 comprises the penpoint 5, the ink tank 41 for directly storing ink therein, an ink reserving member 6 and a vent passage 7 for making the interior of the ink tank 41 communicate with open air. A closure member 8 is provided at the front end part of a barrel 2. An annular sealer 22 is provided within the barrel 2 at the rear of the closure member 8. Under the condition that the penpoint is retracted, a tightly closed sealing space 10 is constituted within the barrel 2 and, at the same time, the penpoint 5 is housed within the sealing space 10. Under the condition that the penpoint is projected, the closure member 8 opens a front end hole 21 and, at the same time, leaves open the sealing space 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、出没式筆記具に関する。詳細には、インキを直に貯溜する直液式の筆記体を軸筒内部に前後方向に移動可能に収容した出没式筆記具に関する。   The present invention relates to a retractable writing instrument. More specifically, the present invention relates to a retractable writing instrument in which a direct liquid type writing body for directly storing ink is accommodated in a shaft cylinder so as to be movable in the front-rear direction.

従来この種の出没式筆記具において、特許文献１には、チップ内孔にインキ誘導芯が密装され、チップ後方に直列状に継ぎ手、インキ保溜体が一体的に設けられて、インキ収容管内に低粘度インキが充填されると共にインキ収容管の前方部内孔にインキ保溜体が嵌着されて成るボールペンのリフィールと、軸筒の後方にノック操作により軸筒に対し前後退位置に係止される回転カム機構部が配設され、その回転カム機構部の前方にリターンスプリングにより後方に附勢された前記ボールペンのリフィールが設けられて成るノック式筆記具が開示されている。 Conventionally, in this type of retractable writing instrument, Patent Document 1 discloses that an ink guide core is tightly mounted in a chip inner hole, and a joint and an ink reservoir are integrally provided in the rear of the chip in an ink receiving tube. A ballpoint pen refill with low-viscosity ink filled and an ink reservoir fitted in the front hole of the ink containing tube, and locked in the forward and backward position with respect to the shaft cylinder by knocking behind the shaft cylinder There is disclosed a knock type writing instrument in which a rotating cam mechanism portion is disposed, and a refill of the ballpoint pen urged rearward by a return spring is provided in front of the rotating cam mechanism portion.

また、前記特許文献１には、先端ボールがチップ先端のボール抱持部の内縁に常時は押圧されて密接し、筆記時に密接状態が解除されるように設けられて、チップ先端がシール不要で軸筒に搭載可能と成されたノック式筆記具が開示されている。 Further, in Patent Document 1, the tip ball is always pressed and brought into close contact with the inner edge of the ball holding portion at the tip of the tip, and the tip tip is not required to be sealed when writing. A knock-type writing instrument that can be mounted on a shaft cylinder is disclosed.

また、前記特許文献１には、鍔部の所要箇所に通気溝を設けて外気とインキ保溜体及びインキ収容管内の空気置換を行なうこと、及び、空気置換のための通気路は細く迂回したものが望ましいことが記載されている。 Further, in Patent Document 1, a ventilation groove is provided at a required portion of the collar to perform air replacement in the outside air, the ink reservoir, and the ink storage tube, and the air passage for air replacement is narrowly bypassed. It is stated that something is desirable.

特開平１０−２６４５８５号公報Japanese Patent Laid-Open No. 10-264585

前記従来の出没式筆記具は、先端ボールをボール抱持部の内縁に密接することにより、ペン先を密閉する構造であるため、ボールペンチップ以外のペン先を採用することが困難である。また、前記従来の出没式筆記具は、ペン先没入状態であっても、通気路は外気と連通されているため、長期間保管すると、インキタンク内のインキが蒸発して、筆記不能となるおそれがある。また、前記従来の出没式筆記具は、ペン先没入状態でインキタンク内の圧力が上昇すると、通気路を通って外部にインキが漏出するおそれがある。 The conventional retractable writing instrument has a structure in which the tip of the tip ball is brought into close contact with the inner edge of the ball holding portion to seal the tip of the pen, so that it is difficult to employ a pen tip other than the ballpoint pen tip. In addition, even if the conventional retractable writing instrument is in the pen tip immersion state, the air passage is communicated with the outside air, so if stored for a long period of time, the ink in the ink tank may evaporate and writing may become impossible. There is. Further, in the conventional retractable writing instrument, when the pressure in the ink tank rises in the pen tip immersion state, there is a possibility that the ink leaks to the outside through the air passage.

本発明は、前記従来の問題点を解決するものであって、いかなる種類のペン先を採用してもペン先没入時にペン先を密閉可能であり、また、ペン先没入状態で長期間保管しても、通気路からインキタンク内のインキが蒸発することを防止でき、さらに、ペン先没入状態でインキタンク内の圧力が上昇しても、通気路を通って外部にインキが漏出することを防止できる出没式筆記具を提供しようとするものである。 The present invention solves the above-mentioned conventional problems, and the pen tip can be sealed when the pen tip is immersed regardless of the type of the pen tip, and is stored for a long time in the pen tip immersion state. However, the ink in the ink tank can be prevented from evaporating from the air passage, and even if the pressure in the ink tank rises with the pen tip immersed, ink can leak out through the air passage. It is intended to provide an intrusive writing instrument that can be prevented.

尚、本発明で、「前」とはペン先側を指し、「後」とはその反対側を指す。また、本発明で、「ペン先没入」とは、ペン先が軸筒内部に没入することを言い、「ペン先突出」とは、ペン先が軸筒の前端孔から外部に突出することを言う。 In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side. Further, in the present invention, “nib immersion” means that the nib is immersed inside the shaft cylinder, and “pen tip protrusion” means that the nib protrudes outside from the front end hole of the shaft cylinder. To tell.

（構成１）
本発明は、筆記体３が、ペン先５と、インキを直に貯溜するインキタンク４１と、ペン先５とインキタンク４１との間に配置され且つインキタンク４１の内圧上昇に伴う溢出インキを一時的に保持するインキ保溜部材６と、インキタンク４１内と外気とを連通する通気路７とを備え、前記筆記体３を軸筒２内部に前後方向に移動可能に収容し、前記筆記体３のペン先５を軸筒２の前端孔２１から出没可能に構成してなる出没式筆記具であって、軸筒２の前端部に開閉部材８を設け、前端孔２１より後方の軸筒２内部に環状のシール体２２を設け、ペン先没入時に、前記開閉部材８が前端孔２１を閉鎖し且つ前記シール体２２が筆記体３の外周面と密接することにより、軸筒２内部に密閉されたシール空間１０を構成するとともに該シール空間１０内部にペン先５を収容し、ペン先突出時に、前記開閉部材８が前端孔２１を開口させ且つ前記シール空間１０を開放すること（構成１）を要件とする。 (Configuration 1)
In the present invention, the cursive body 3 is disposed between the nib 5, the ink tank 41 for storing ink directly, the nib 5 and the ink tank 41, and the overflow ink that accompanies an increase in the internal pressure of the ink tank 41. An ink storage member 6 that temporarily holds and an air passage 7 that allows the inside of the ink tank 41 to communicate with the outside air are provided. The writing body 3 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. It is a retractable writing instrument configured such that the pen tip 5 of the body 3 can be retracted from the front end hole 21 of the shaft cylinder 2, and an opening / closing member 8 is provided at the front end portion of the shaft cylinder 2, and the shaft cylinder behind the front end hole 21 2 is provided with an annular seal body 22, and when the pen nib is inserted, the opening / closing member 8 closes the front end hole 21 and the seal body 22 is in close contact with the outer peripheral surface of the writing body 3. A sealed space 10 is formed and the sealed space 0 inside houses the pen tip 5, when the pen tip protruding, the closing member 8 is a requirement to open the seal space 10 and is opened to the front end hole 21 (configuration 1).

前記構成１の出没式筆記具１は、ペン先没入時に、密閉されたシール空間１０内部にペン先５を収容することにより、いかなる種類のペン先５を採用してもペン先没入時にペン先５を確実に密閉でき、ペン先５の乾燥を防止できる。その結果、筆記体３のペン先５として、ボールペンチップに限らず、あらゆる種類のペン先を用いた直液タイプの出没式筆記具が得られる。 The retractable writing instrument 1 having the above-described configuration 1 accommodates the pen tip 5 in the sealed seal space 10 when the pen tip is immersed. Can be reliably sealed, and drying of the nib 5 can be prevented. As a result, not only a ballpoint pen tip but also a direct liquid type retractable writing instrument using any kind of nib as the nib 5 of the writing body 3 is obtained.

（構成２）
前記構成１の出没式筆記具１において、筆記体３の外面に通気路７の開口部７１を設け、ペン先没入時に前記シール空間１０内部に前記通気路７の開口部７１を位置させてなること（構成２）が好ましい。 (Configuration 2)
In the retractable writing instrument 1 having the configuration 1, an opening 71 of the air passage 7 is provided on the outer surface of the writing body 3, and the opening 71 of the air passage 7 is positioned inside the seal space 10 when the pen tip is immersed. (Configuration 2) is preferable.

前記構成２の出没式筆記具１は、ペン先没入時に、密閉されたシール空間１０内部に通気路７の開口部７１を位置させてなることにより、ペン先没入時の通気路７と外気との連通が遮断され、ペン先没入状態で長期間保管しても、通気路７からインキタンク４１内のインキが蒸発することを防止でき、さらに、ペン先没入状態でインキタンク４１内の圧力が上昇しても、通気路７を通って外部にインキが漏出することを防止できる。 The retractable writing instrument 1 having the above-described configuration 2 is configured such that the opening 71 of the air passage 7 is positioned inside the sealed space 10 when the pen tip is immersed, so that the air passage 7 and the outside air at the time of the pen tip immersion are disposed. Even if the communication is cut off and the pen nib is immersed for a long period of time, the ink in the ink tank 41 can be prevented from evaporating from the air passage 7, and the pressure in the ink tank 41 is increased in the nib nib state. Even so, it is possible to prevent the ink from leaking outside through the air passage 7.

（構成３）
前記構成１の出没式筆記具１において、筆記体３の外面に通気路７の開口部７１を設け、ペン先没入時に前記通気路７の開口部７１を前記シール体２２が密閉してなること（構成３）が好ましい。 (Configuration 3)
In the retractable writing instrument 1 of the configuration 1, the opening 71 of the air passage 7 is provided on the outer surface of the writing body 3, and the opening 22 of the air passage 7 is sealed by the seal body 22 when the pen tip is immersed ( Configuration 3) is preferred.

前記構成３の出没式筆記具１は、ペン先没入時に前記通気路７の開口部７１を前記シール体２２が密閉してなることにより、ペン先没入時の通気路７と外気との連通が遮断され、ペン先没入状態で長期間保管しても、通気路７からインキタンク４１内のインキが蒸発することを防止でき、さらに、ペン先没入状態でインキタンク４１内の圧力が上昇しても、通気路７を通って外部にインキが漏出することを防止できる。 In the retractable writing instrument 1 having the configuration 3, the sealing body 22 seals the opening 71 of the air passage 7 when the pen tip is immersed, so that the communication between the air passage 7 and the outside air when the pen tip is immersed is cut off. Even if the pen nib is immersed for a long period of time, the ink in the ink tank 41 can be prevented from evaporating from the air passage 7, and even if the pressure in the ink tank 41 rises in the nib nib state. Ink can be prevented from leaking outside through the air passage 7.

構成１によれば、いかなる種類のペン先を採用してもペン先没入時にペン先を確実に密閉でき、ペン先の乾燥を防止できる。 According to the structure 1, even if it employ | adopts what kind of pen tip, a pen tip can be reliably sealed at the time of pen tip immersion, and drying of a pen tip can be prevented.

構成２によれば、ペン先没入状態で長期間保管しても、通気路からインキタンク内のインキが蒸発することを防止でき、さらに、ペン先没入状態でインキタンク内の圧力が上昇しても、通気路を通って外部にインキが漏出することを防止できる。 According to Configuration 2, even if the pen nib is immersed for a long period of time, the ink in the ink tank can be prevented from evaporating from the air passage, and the pressure in the ink tank increases when the nib is immersed. In addition, the ink can be prevented from leaking outside through the air passage.

構成３によれば、ペン先没入状態で長期間保管しても、通気路からインキタンク内のインキが蒸発することを防止でき、さらに、ペン先没入状態でインキタンク内の圧力が上昇しても、通気路を通って外部にインキが漏出することを防止できる。 According to the configuration 3, even when the pen nib is immersed for a long time, the ink in the ink tank can be prevented from evaporating from the air passage, and further, the pressure in the ink tank increases when the nib is immersed. In addition, the ink can be prevented from leaking outside through the air passage.

（第１の実施の形態）
図１及び図２に本発明の第１の実施の形態を示す。 (First embodiment)
1 and 2 show a first embodiment of the present invention.

本実施の形態の出没式筆記具１は、軸筒２と、該軸筒２内に前後方向に移動可能に収容される筆記体３とを備える。 A retractable writing instrument 1 according to the present embodiment includes a shaft cylinder 2 and a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction.

・軸筒
前記軸筒２の前端には、前端孔２１が貫設される。前記前端孔２１を通して筆記体３のペン先５が外部に突出可能且つ内部に没入可能に構成される。前記軸筒２の内部には、コイルスプリング１１が収容され、前記コイルスプリング１１により筆記体３が後方に常時付勢される。前記コイルスプリング１１の前端は、軸筒２の内面に形成した前側係止部２３に係止され、一方、コイルスプリング１１の後端は、筆記体３の外面に形成した後側係止部４２に係止される。本実施の形態では、前記軸筒２は、前端孔２１を備える前軸２ａと、該前軸２ａと連結される後軸２ｂとからなる二部材で構成される。前記前軸２ａの内面には前側係止部２３が形成され、前記前側係止部２３の後面が後軸２ｂの前端に当接される。尚、前記軸筒２は一部材で構成してもよい。 -Shaft cylinder A front end hole 21 is provided through the front end of the shaft cylinder 2. Through the front end hole 21, the pen tip 5 of the writing body 3 can be projected to the outside and can be immersed therein. A coil spring 11 is accommodated in the shaft cylinder 2, and the writing body 3 is constantly urged backward by the coil spring 11. The front end of the coil spring 11 is locked to a front locking portion 23 formed on the inner surface of the shaft tube 2, while the rear end of the coil spring 11 is a rear locking portion 42 formed on the outer surface of the writing body 3. It is locked to. In the present embodiment, the shaft cylinder 2 includes two members including a front shaft 2a having a front end hole 21 and a rear shaft 2b coupled to the front shaft 2a. A front locking portion 23 is formed on the inner surface of the front shaft 2a, and the rear surface of the front locking portion 23 is brought into contact with the front end of the rear shaft 2b. The shaft tube 2 may be formed of a single member.

前記軸筒２（前軸２ａ）の前端部は、軸線に対して非垂直面からなる傾斜面となっている。前記軸筒２の前端部の傾斜面に前端孔２１が開口される。 The front end portion of the shaft cylinder 2 (front shaft 2a) is an inclined surface made of a non-perpendicular surface with respect to the axis. A front end hole 21 is opened in the inclined surface of the front end portion of the shaft cylinder 2.

・出没機構
前記軸筒２（後軸２ｂ）の後端部内部には、出没機構９が設けられる。前記出没機構９は、筆記時、操作部９３の操作により、筆記体３を前方に移動させ、ペン先５を前端孔２１から外部に突出状態にさせ、非筆記時、筆記体３を後方に移動させ、ペン先５を前端孔２１から軸筒２内部に没入状態にさせるものである。本実施の形態では、前記出没機構９は、回転カムを用いたノック式機構であり、軸筒２内に配置された円筒状のカム本体９１と、該カム本体９１内のカム部と係合し且つ筆記体３後端と当接する回転部材９２と、該回転部材９２と係合し且つ軸筒２後端より突出するノック部（操作部９３）とからなる。前記出没機構９は、ペン先突出操作、ペン先没入操作の両操作が、ノック部を前方へ押圧するダブルノック式である。これ以外にも、前記出没機構９は、筆記体３のペン先５を出没させるものであれば、例えば、軸筒２を回転操作する回転式や、軸筒２の側壁の窓孔より突出された操作部９３を前方に押圧するスライド式等が挙げられる。 Intruding mechanism A retracting mechanism 9 is provided inside the rear end of the shaft cylinder 2 (rear shaft 2b). The in / out mechanism 9 moves the writing body 3 forward by operating the operation unit 93 during writing, causes the pen tip 5 to protrude from the front end hole 21, and moves the writing body 3 backward during non-writing. The pen tip 5 is moved from the front end hole 21 into the shaft cylinder 2 so as to be immersed. In the present embodiment, the retracting mechanism 9 is a knock mechanism using a rotating cam, and is engaged with a cylindrical cam body 91 disposed in the shaft cylinder 2 and a cam portion in the cam body 91. The rotating member 92 is in contact with the rear end of the writing body 3, and the knock portion (operating portion 93) is engaged with the rotating member 92 and protrudes from the rear end of the shaft tube 2. The retracting mechanism 9 is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation press the knock portion forward. In addition to this, as long as the penetrating mechanism 9 causes the pen tip 5 of the writing body 3 to project, the projecting mechanism 9 protrudes from, for example, a rotary type that rotates the shaft tube 2 or a window hole on the side wall of the shaft tube 2. In addition, a slide type that presses the operation unit 93 forward may be used.

・筆記体
前記筆記体３は、前端にペン先５を備えたインキ保溜部材６と、該インキ保溜部材６を内部前部に収容した容器４と、該容器４の内部のインキ保溜部材６の後方に設けたインキタンク４１と、該インキタンク４１内と外気とを連通させる通気路７とからなる。 Cursive body The cursive body 3 includes an ink reservoir member 6 having a nib 5 at the front end, a container 4 in which the ink reservoir member 6 is housed in an inner front portion, and an ink reservoir inside the container 4. An ink tank 41 provided behind the member 6 and an air passage 7 for communicating the inside of the ink tank 41 with the outside air.

前記容器４は、前端が開口され且つ後端が閉鎖された有底筒状体である。前記容器４の内部前部にはインキ保溜部材６が挿着される。前記容器４内のインキ保溜部材６の後方には、インキタンク４１が形成される。前記インキタンク４１の内部にはインキが直接、収容される。前記容器４の前端部外面には環状凸部３１が形成される。 The container 4 is a bottomed cylindrical body having a front end opened and a rear end closed. An ink storage member 6 is inserted into the inner front portion of the container 4. An ink tank 41 is formed behind the ink storage member 6 in the container 4. Ink is directly stored in the ink tank 41. An annular convex portion 31 is formed on the outer surface of the front end portion of the container 4.

前記インキ保溜部材６は、複数の円板状櫛歯６１を有する合成樹脂の射出成形体であり、軸心に軸心孔が貫設され、隣接する各々の櫛歯６１の間に複数のインキ保溜溝が形成され、前記櫛歯６１群の外面に軸方向のインキ誘導スリット（図示せず）が形成され、さらに、前記櫛歯６１群の外面に切り欠き状の空気交替溝（図示せず）が形成される。また、前記軸心孔に、合成樹脂押出成形体または繊維加工体からなるインキ誘導芯６２が挿着される。 The ink storage member 6 is a synthetic resin injection-molded body having a plurality of disc-like comb teeth 61, and a shaft hole is formed through the shaft center. An ink storage groove is formed, an axial ink guide slit (not shown) is formed on the outer surface of the comb teeth 61 group, and a notch-shaped air alternation groove (see FIG. Not shown). Further, an ink guide core 62 made of a synthetic resin extruded body or a fiber processed body is inserted into the shaft hole.

前記インキ保溜部材６の前端には、ボールペンチップからなるペン先５が取り付けられる。前記ペン先５は、前端にボールを回転可能に抱持したチップ本体５１と、該チップ本体５１後部が圧入固着されるペン先保持部材５２とからなる。前記ペン先保持部材５２の内部には、前記インキ誘導芯６２の前端と接続される繊維加工体からなるインキ中継芯５３が収容され、前記チップ本体５１の内部には、前記インキ中継芯５３の前端と接続される合成樹脂押出成形体からなるインキ供給芯５４が収容される。インキタンク４１内のインキは、前記インキ誘導芯６２から、ペン先保持部材５２の内部のインキ中継芯５３に供給され、前記インキ中継芯５３からチップ本体５１内部のインキ供給芯５４に供給され、前記インキ供給芯５４からボールに供給される。前記ペン先５は、ボールペンチップ以外にも、例えば、繊維加工体や多孔質体からなるペン体、軸方向のインキ導出路を有する合成樹脂の押出成形体よりなるペン体等が挙げられる。 A pen tip 5 made of a ballpoint pen tip is attached to the front end of the ink storage member 6. The pen tip 5 includes a tip body 51 that rotatably holds a ball at a front end, and a pen tip holding member 52 to which a rear portion of the tip body 51 is press-fitted and fixed. An ink relay core 53 made of a fiber processed body connected to the front end of the ink guide core 62 is housed inside the pen tip holding member 52, and the ink relay core 53 is placed inside the chip body 51. An ink supply core 54 made of a synthetic resin extrusion molded body connected to the front end is accommodated. The ink in the ink tank 41 is supplied from the ink guide core 62 to the ink relay core 53 inside the pen tip holding member 52, and from the ink relay core 53 to the ink supply core 54 inside the chip body 51, The ink is supplied from the ink supply core 54 to the ball. In addition to the ballpoint pen tip, examples of the pen tip 5 include a pen body made of a fiber processed body or a porous body, and a pen body made of a synthetic resin extrusion-molded body having an axial ink outlet path.

・通気路
前記通気路７は、容器４内面とインキ保溜部材６の空気交替溝との間に形成される。前記空気交替溝の前端は、前記容器４の前端の環状凸部３１より前方に位置され、それにより、前記通気路７の開口部７１は、容器４の前端開口部７１の前方に位置される。前記通気路７の開口部７１を通して通気路７内及びインキタンク４１内と外気とが連通される。 Ventilation path The ventilation path 7 is formed between the inner surface of the container 4 and the air replacement groove of the ink retaining member 6. The front end of the air exchange groove is positioned in front of the annular convex portion 31 at the front end of the container 4, whereby the opening 71 of the vent path 7 is positioned in front of the front end opening 71 of the container 4. . The outside air communicates with the inside of the air passage 7 and the ink tank 41 through the opening 71 of the air passage 7.

・開閉部材
軸筒２（前軸２ａ）の外面には、前端孔２１を開閉する開閉部材８が取り付けられる。前記開閉部材８は、前端孔２１の周壁に密接可能な弾性材料よりなる蓋体８１と、該蓋体８１を後方に付勢するバネ部材８２とからなる。前記蓋体８１の一端が、前軸２ａの前端の傾斜面状の周壁の後端側に支持され、前記蓋体８１が回動可能となる。ペン先没入時に、蓋体８１が前端孔２１の周壁に密接され、開閉部材８により前端孔２１が閉鎖される（図１参照）。一方、ペン先突出時に、蓋体８１が筆記体３により前方へ押しやられて、蓋体８１と前端孔２１の周壁との密接が解除され、前端孔２１が開口される（図２参照）。 The opening / closing member 8 that opens and closes the front end hole 21 is attached to the outer surface of the opening / closing member shaft cylinder 2 (front shaft 2a). The opening / closing member 8 includes a lid 81 made of an elastic material that can be brought into close contact with the peripheral wall of the front end hole 21, and a spring member 82 that urges the lid 81 backward. One end of the lid 81 is supported on the rear end side of the inclined peripheral wall at the front end of the front shaft 2a, so that the lid 81 can rotate. At the time of pen tip immersion, the lid 81 is brought into close contact with the peripheral wall of the front end hole 21, and the front end hole 21 is closed by the opening / closing member 8 (see FIG. 1). On the other hand, when the pen tip protrudes, the lid 81 is pushed forward by the writing body 3 to release the close contact between the lid 81 and the peripheral wall of the front end hole 21, and the front end hole 21 is opened (see FIG. 2).

・環状のシール体
軸筒２の前部内面（具体的には、前軸２ａの前側係止部２３の前方の内面）には弾性材料からなる環状のシール体２２が固定される。前記シール体２２の前方には、筆記体３の環状凸部３１が位置している。ペン先没入時、前記環状のシール体２２が、通気路７の開口部７１の後方の筆記体３の外面に形成された環状凸部３１の後面に密接される（図１参照）。一方、ペン先突出時、前記環状のシール体２２と環状凸部との密接が解除される（図２参照）。 An annular seal body 22 made of an elastic material is fixed to the inner surface of the front portion of the annular seal body barrel 2 (specifically, the inner surface in front of the front locking portion 23 of the front shaft 2a). An annular convex portion 31 of the writing body 3 is located in front of the seal body 22. When the pen nib is immersed, the annular seal body 22 is brought into close contact with the rear surface of the annular convex portion 31 formed on the outer surface of the writing body 3 behind the opening 71 of the air passage 7 (see FIG. 1). On the other hand, when the pen tip protrudes, the close contact between the annular seal body 22 and the annular convex portion is released (see FIG. 2).

・シール空間
ペン先没入時、開閉部材８により前端孔２１が閉鎖されるとともに、環状のシール体２２と環状凸部３１とが密接され、それにより、軸筒２内部の前端孔２１後方に、密閉された空間よりなるシール空間１０が形成され、前記シール空間１０内部に、ペン先５と、通気路７の開口部７１が収容される（図１参照）。一方、ペン先突出時に、開閉部材８が前端孔２１を開口させ且つシール体２２と環状凸部３１との密接が解除され、それにより、前記シール空間１０が開放され、通気路７の開口部７１を通して通気路７内及びインキタンク４１内と外気とが連通可能となる（図２参照）。 When the seal space pen tip is immersed, the front end hole 21 is closed by the opening / closing member 8, and the annular seal body 22 and the annular convex portion 31 are brought into close contact with each other, thereby the rear end of the front end hole 21 inside the shaft cylinder 2 is A seal space 10 formed of a sealed space is formed, and the pen tip 5 and the opening 71 of the air passage 7 are accommodated in the seal space 10 (see FIG. 1). On the other hand, when the pen tip protrudes, the opening / closing member 8 opens the front end hole 21 and closes the seal body 22 and the annular protrusion 31, thereby opening the seal space 10 and opening the vent path 7. 71 allows the inside of the air passage 7 and the ink tank 41 to communicate with the outside air (see FIG. 2).

（第２の実施の形態）
図３及び図４に本発明の第２の実施の形態を示す。 (Second Embodiment)
3 and 4 show a second embodiment of the present invention.

本実施の形態の出没式筆記具１は、軸筒２と、該軸筒２内に前後方向に移動可能に収容される筆記体３とを備える。 A retractable writing instrument 1 according to the present embodiment includes a shaft cylinder 2 and a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction.

・軸筒
前記軸筒２の前端には、前端孔２１が貫設される。前記前端孔２１を通して筆記体のペン先５が外部に突出可能且つ内部に没入可能に構成される。前記軸筒２の内部には、コイルスプリング１１が収容され、前記コイルスプリング１１により筆記体３が後方に常時付勢される。前記コイルスプリング１１の前端は、軸筒２の内面に形成した前側係止部２３に係止され、一方、コイルスプリング１１の後端は、筆記体３の外面に形成した後側係止部４２に係止される。本実施の形態では、前記軸筒２は、前端孔２１を備える前軸２ａと、該前軸２ａと連結される後軸２ｂとからなる二部材で構成される。前記前軸２ａの内面には前側係止部２３が形成され、前記前側係止部２３の後面が後軸２ｂの前端に当接される。尚、前記軸筒２は一部材で構成してもよい。 -Shaft cylinder A front end hole 21 is provided through the front end of the shaft cylinder 2. The pen tip 5 of the cursive body is configured to be able to protrude outside and to be immersed inside through the front end hole 21. A coil spring 11 is accommodated in the shaft cylinder 2, and the writing body 3 is constantly urged backward by the coil spring 11. The front end of the coil spring 11 is locked to a front locking portion 23 formed on the inner surface of the shaft tube 2, while the rear end of the coil spring 11 is a rear locking portion 42 formed on the outer surface of the writing body 3. It is locked to. In the present embodiment, the shaft cylinder 2 includes two members including a front shaft 2a having a front end hole 21 and a rear shaft 2b coupled to the front shaft 2a. A front locking portion 23 is formed on the inner surface of the front shaft 2a, and the rear surface of the front locking portion 23 is brought into contact with the front end of the rear shaft 2b. The shaft tube 2 may be formed of a single member.

前記軸筒２（前軸２ａ）の前端部は、軸線に対して非垂直面からなる傾斜面となっている。前記軸筒２の前端部の傾斜面に前端孔２１が開口される。 The front end portion of the shaft cylinder 2 (front shaft 2a) is an inclined surface made of a non-perpendicular surface with respect to the axis. A front end hole 21 is opened in the inclined surface of the front end portion of the shaft cylinder 2.

・出没機構
前記軸筒２（後軸２ｂ）の後端部内部には、出没機構９が設けられる。前記出没機構９は、筆記時、操作部９３の操作により、筆記体３を前方に移動させ、ペン先５を前端孔２１から外部に突出状態にさせ、非筆記時、筆記体３を後方に移動させ、ペン先５を前端孔２１から軸筒２内部に没入状態にさせるものである。本実施の形態では、前記出没機構９は、回転カムを用いたノック式機構であり、軸筒２内に配置された円筒状のカム本体９１と、該カム本体９１内のカム部と係合し且つ筆記体３後端と当接する回転部材９２と、該回転部材９２と係合し且つ軸筒２後端より突出するノック部（操作部９３）とからなる。前記出没機構９は、ペン先突出操作、ペン先没入操作の両操作が、ノック部を前方へ押圧するダブルノック式である。これ以外にも、前記出没機構９は、筆記体のペン先５を出没させるものであれば、例えば、軸筒２を回転操作する回転式や、軸筒２の側壁の窓孔より突出された操作部９３を前方に押圧するスライド式等が挙げられる。 Intruding mechanism A retracting mechanism 9 is provided inside the rear end of the shaft cylinder 2 (rear shaft 2b). The in / out mechanism 9 moves the writing body 3 forward by operating the operation unit 93 during writing, causes the pen tip 5 to protrude from the front end hole 21, and moves the writing body 3 backward during non-writing. The pen tip 5 is moved from the front end hole 21 into the shaft cylinder 2 so as to be immersed. In the present embodiment, the retracting mechanism 9 is a knock mechanism using a rotating cam, and is engaged with a cylindrical cam body 91 disposed in the shaft cylinder 2 and a cam portion in the cam body 91. The rotating member 92 is in contact with the rear end of the writing body 3, and the knock portion (operating portion 93) is engaged with the rotating member 92 and protrudes from the rear end of the shaft tube 2. The retracting mechanism 9 is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation press the knock portion forward. In addition to this, as long as the in / out mechanism 9 is to make the pen nib 5 of the cursive body appear in / out, for example, it is protruded from a rotary type that rotates the shaft cylinder 2 or a window hole in the side wall of the shaft cylinder 2 Examples include a slide type that pushes the operation unit 93 forward.

・筆記体
前記筆記体３は、前端にペン先５を備えたインキ保溜部材６と、該インキ保溜部材６を内部前部に収容した容器４と、該容器４の内部のインキ保溜部材６の後方に設けたインキタンク４１と、該インキタンク４１内と外気とを連通させる通気路７とからなる。 Cursive body The cursive body 3 includes an ink reservoir member 6 having a nib 5 at the front end, a container 4 in which the ink reservoir member 6 is housed in an inner front portion, and an ink reservoir inside the container 4. An ink tank 41 provided behind the member 6 and an air passage 7 for communicating the inside of the ink tank 41 with the outside air.

前記容器４は、前端が開口され且つ後端が閉鎖された有底筒状体である。前記容器４の内部前部にはインキ保溜部材６が挿着される。前記容器４内のインキ保溜部材６の後方には、インキタンク４１が形成される。前記インキタンク４１の内部にはインキが直接、収容される。前記容器４の前端部外面には環状凸部３１が形成される。 The container 4 is a bottomed cylindrical body having a front end opened and a rear end closed. An ink storage member 6 is inserted into the inner front portion of the container 4. An ink tank 41 is formed behind the ink storage member 6 in the container 4. Ink is directly stored in the ink tank 41. An annular convex portion 31 is formed on the outer surface of the front end portion of the container 4.

前記インキ保溜部材６は、複数の円板状櫛歯６１を有する合成樹脂の射出成形体であり、軸心に軸心孔が貫設され、隣接する各々の櫛歯６１の間に複数のインキ保溜溝が形成され、前記櫛歯６１群の外面に軸方向のインキ誘導スリット（図示せず）が形成され、さらに、前記櫛歯６１群の外面に切り欠き状の空気交替溝（図示せず）が形成される。また、前記軸心孔に、合成樹脂押出成形体または繊維加工体からなるインキ誘導芯６２が挿着される。 The ink storage member 6 is a synthetic resin injection-molded body having a plurality of disc-like comb teeth 61, and a shaft hole is formed through the shaft center. An ink storage groove is formed, an axial ink guide slit (not shown) is formed on the outer surface of the comb teeth 61 group, and a notch-shaped air alternation groove (see FIG. Not shown). Further, an ink guide core 62 made of a synthetic resin extruded body or a fiber processed body is inserted into the shaft hole.

前記インキ保溜部材６の前端には、ボールペンチップからなるペン先５が取り付けられる。前記ペン先５は、前端にボールを回転可能に抱持したチップ本体５１と、該チップ本体５１後部が圧入固着されるペン先保持部材５２とからなる。前記ペン先保持部材５２の内部には、前記インキ誘導芯６２の前端と接続される繊維加工体からなるインキ中継芯５３が収容され、前記チップ本体５１の内部には、前記インキ中継芯５３の前端と接続される合成樹脂押出成形体からなるインキ供給芯５４が収容される。インキタンク４１内のインキは、前記インキ誘導芯６２から、ペン先保持部材５２の内部のインキ中継芯５３に供給され、前記インキ中継芯５３からチップ本体５１内部のインキ供給芯５４に供給され、前記インキ供給芯５４からボールに供給される。 A pen tip 5 made of a ballpoint pen tip is attached to the front end of the ink storage member 6. The pen tip 5 includes a tip body 51 that rotatably holds a ball at a front end, and a pen tip holding member 52 to which a rear portion of the tip body 51 is press-fitted and fixed. An ink relay core 53 made of a fiber processed body connected to the front end of the ink guide core 62 is housed inside the pen tip holding member 52, and the ink relay core 53 is placed inside the chip body 51. An ink supply core 54 made of a synthetic resin extrusion molded body connected to the front end is accommodated. The ink in the ink tank 41 is supplied from the ink guide core 62 to the ink relay core 53 inside the pen tip holding member 52, and from the ink relay core 53 to the ink supply core 54 inside the chip body 51, The ink is supplied from the ink supply core 54 to the ball.

前記ペン先保持部材５２は、容器４の前端開口部内面に圧入固着されるとともに、インキ保溜部材６の前端に取り付けられる。前記ペン先保持部材５２の外面には環状凸部３１が形成され、該環状凸部３１の後面が、容器４の前端と当接される。 The pen point holding member 52 is press-fitted and fixed to the inner surface of the front end opening of the container 4 and is attached to the front end of the ink reservoir member 6. An annular convex portion 31 is formed on the outer surface of the pen tip holding member 52, and the rear surface of the annular convex portion 31 is in contact with the front end of the container 4.

・通気路
前記通気路７は、容器４内面とインキ保溜部材６の空気交替溝との間に形成される。前記通気路７の前端は、前記容器４の前端部に形成した切り欠きにより径方向外方に開口される。それにより、前記通気路７の開口部７１は、容器４の前端部に位置される。即ち、通気路７の開口部７１は、環状凸部３１よりも後方の筆記体３の外面から、径方向外方に開口される。前記通気路７の開口部７１を通して通気路７内及びインキタンク４１内と外気とが連通される。 Ventilation path The ventilation path 7 is formed between the inner surface of the container 4 and the air replacement groove of the ink retaining member 6. The front end of the air passage 7 is opened radially outward by a notch formed in the front end portion of the container 4. Thereby, the opening 71 of the ventilation path 7 is located at the front end of the container 4. In other words, the opening 71 of the air passage 7 is opened radially outward from the outer surface of the writing body 3 behind the annular protrusion 31. The outside air communicates with the inside of the air passage 7 and the ink tank 41 through the opening 71 of the air passage 7.

・開閉部材
軸筒２（前軸２ａ）の外面には、前端孔２１を開閉する開閉部材８が取り付けられる。前記開閉部材８は、前端孔２１の周壁に密接可能な弾性材料よりなる蓋体８１と、該蓋体８１を後方に付勢するバネ部材８２とからなる。前記蓋体８１の一端が、前軸２ａの前端の傾斜面状の周壁の後端側に支持され、前記蓋体８１が回動可能となる。ペン先没入時に、蓋体８１が前端孔２１の周壁に密接され、開閉部材８により前端孔２１が閉鎖される（図３参照）。一方、ペン先突出時に、蓋体８１が筆記体により前方へ押しやられて、蓋体８１と前端孔２１の周壁との密接が解除され、前端孔２１が開口される（図４参照）。 The opening / closing member 8 that opens and closes the front end hole 21 is attached to the outer surface of the opening / closing member shaft cylinder 2 (front shaft 2a). The opening / closing member 8 includes a lid 81 made of an elastic material that can be brought into close contact with the peripheral wall of the front end hole 21, and a spring member 82 that urges the lid 81 backward. One end of the lid 81 is supported on the rear end side of the inclined peripheral wall at the front end of the front shaft 2a, so that the lid 81 can rotate. At the time of pen tip immersion, the lid 81 is brought into close contact with the peripheral wall of the front end hole 21, and the front end hole 21 is closed by the opening / closing member 8 (see FIG. 3). On the other hand, when the pen tip protrudes, the lid 81 is pushed forward by the writing body, the close contact between the lid 81 and the peripheral wall of the front end hole 21 is released, and the front end hole 21 is opened (see FIG. 4).

・環状のシール体
軸筒２の前部内面（具体的には、前軸２ａの前側係止部２３の前方の内面）には弾性材料からなる環状のシール体２２が固定される。前記シール体２２の前方には、筆記体３の環状凸部３１が位置している。ペン先没入時、前記環状のシール体２２が、通気路７の開口部７１の開口縁に密接され、該通気路７の開口部７１が密閉される（図３参照）。一方、ペン先突出時、前記環状のシール体２２と通気路７の開口部７１の開口縁との密接が解除される（図４参照）。 An annular seal body 22 made of an elastic material is fixed to the inner surface of the front portion of the annular seal body barrel 2 (specifically, the inner surface in front of the front locking portion 23 of the front shaft 2a). An annular convex portion 31 of the writing body 3 is located in front of the seal body 22. When the pen nib is immersed, the annular seal body 22 is brought into close contact with the opening edge of the opening 71 of the ventilation path 7, and the opening 71 of the ventilation path 7 is sealed (see FIG. 3). On the other hand, when the pen tip protrudes, the close contact between the annular seal body 22 and the opening edge of the opening 71 of the air passage 7 is released (see FIG. 4).

前記シール体２２は通気路７の開口部７１の面積より僅かに大きく設定され、それにより、シール体２２が開口部７１の全周囲に直接、密接され、通気路７の開口部７１が密閉される。また、前記通気路７の開口部７１は、容器４側壁外面の円周面の一部に形成されているが、シール体２２が環状であるため、筆記体３の回転方向の向きがいずれであっても、シール体２２によって確実に密閉できる。 The sealing body 22 is set to be slightly larger than the area of the opening 71 of the air passage 7, so that the sealing body 22 is in direct contact with the entire periphery of the opening 71 and the opening 71 of the air passage 7 is sealed. The Moreover, although the opening part 71 of the said ventilation path 7 is formed in a part of circumferential surface of the container 4 side wall outer surface, since the seal body 22 is cyclic | annular, the direction of the rotation direction of the writing body 3 is any. Even if it exists, it can be reliably sealed by the seal body 22.

・シール空間
ペン先没入時、開閉部材８により前端孔２１が閉鎖されるとともに、環状のシール体２２と通気路７の開口部７１の開口縁とが密接され、前記通気路７の開口部７１が密閉され、それにより、軸筒２内部の前端孔２１後方に、密閉された空間よりなるシール空間１０が形成され、前記シール空間１０内部に、ペン先５が収容される（図３参照）。一方、ペン先突出時に、開閉部材８が前端孔２１を開口させ且つシール体２２と通気路７の開口部７１の開口縁との密接が解除され、それにより、前記シール空間１０が開放され、通気路７の開口部７１を通して通気路７内及びインキタンク４１内と外気とが連通可能となる（図４参照）。 When the seal space pen tip is immersed, the front end hole 21 is closed by the opening / closing member 8, the annular seal body 22 and the opening edge of the opening 71 of the ventilation path 7 are in close contact with each other, and the opening 71 of the ventilation path 7 As a result, a seal space 10 composed of a sealed space is formed behind the front end hole 21 in the shaft cylinder 2, and the pen tip 5 is accommodated in the seal space 10 (see FIG. 3). . On the other hand, when the pen tip protrudes, the opening / closing member 8 opens the front end hole 21 and the close contact between the seal body 22 and the opening edge of the opening 71 of the ventilation path 7 is released, whereby the seal space 10 is opened, The outside air can communicate with the inside of the air passage 7 and the ink tank 41 through the opening 71 of the air passage 7 (see FIG. 4).

（その他）
尚、本発明の前記インキ保溜部材６は、温度変化等によりインキタンク４１の内圧が上昇した場合に、インキタンク４１からの押し出されたインキ（溢出インキ）を毛細管力により一時的に保持し、一方、インキタンク４１の内圧が減少した場合に、インキ保溜部材６内の保持インキを速やかにインキタンク４１内に戻す機能を有する部材であればよく、本実施の形態の他にも、例えば、らせん状や迷路状のインキ保溜溝を有する合成樹脂の成形体、または繊維加工体や連続気泡体等からなる多孔質含浸体等が挙げられる。 (Other)
The ink storage member 6 of the present invention temporarily holds the ink (excess ink) pushed out from the ink tank 41 by capillary force when the internal pressure of the ink tank 41 rises due to temperature change or the like. On the other hand, when the internal pressure of the ink tank 41 decreases, any member may be used as long as it has a function of quickly returning the retained ink in the ink reservoir member 6 into the ink tank 41. In addition to the present embodiment, For example, a synthetic resin molded body having a spiral or labyrinth-shaped ink retaining groove, a porous impregnated body made of a fiber processed body, an open cell body, or the like can be used.

本発明の第１の実施の形態のペン先没入状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip immersion state of the 1st Embodiment of this invention. 図１のペン先突出状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip protrusion state of FIG. 本発明の第２の実施の形態のペン先没入状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip immersion state of the 2nd Embodiment of this invention. 図３のペン先突出状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the pen tip protrusion state of FIG.

符号の説明Explanation of symbols

１ 出没式筆記具
１１ コイルスプリング
２ 軸筒
２１ 前端孔
２２ シール体
２３ 前側係止部
２ａ 前軸
２ｂ 後軸
３ 筆記体
３１ 環状凸部
４ 容器
４１ インキタンク
４２ 後側係止部
５ ペン先
５１ チップ本体
５２ ペン先保持部材
５３ インキ中継芯
５４ インキ供給芯
６ インキ保溜部材
６１ 櫛歯
６２ インキ誘導芯
７ 通気路
７１ 開口部
８ 開閉部材
８１ 蓋体
８２ バネ部材
９ 出没機構
９１ カム本体
９２ 回転部材
９３ ノック部（操作部）
１０ シール空間 DESCRIPTION OF SYMBOLS 1 Retractable writing instrument 11 Coil spring 2 Shaft cylinder 21 Front end hole 22 Seal body 23 Front side latching part 2a Front shaft 2b Rear axis 3 Writing body 31 Annular convex part 4 Container 41 Ink tank 42 Rear side latching part 5 Pen tip 51 Tip Main body 52 Pen point holding member 53 Ink relay core 54 Ink supply core 6 Ink storage member 61 Comb tooth 62 Ink guide core 7 Air passage 71 Opening 8 Opening / closing member 81 Lid 82 Spring member 9 Intrusion mechanism 91 Cam body 92 Rotating member 93 Knock part (operation part)
10 Seal space

Claims (3)

筆記体が、ペン先と、インキを直に貯溜するインキタンクと、ペン先とインキタンクとの間に配置され且つインキタンクの内圧上昇に伴う溢出インキを一時的に保持するインキ保溜部材と、インキタンク内と外気とを連通する通気路とを備え、前記筆記体を軸筒内部に前後方向に移動可能に収容し、前記筆記体のペン先を軸筒の前端孔から出没可能に構成してなる出没式筆記具であって、軸筒の前端部に開閉部材を設け、前端孔より後方の軸筒内部に環状のシール体を設け、ペン先没入時に、前記開閉部材が前端孔を閉鎖し且つ前記シール体が筆記体の外周面と密接することにより、軸筒内部に密閉されたシール空間を構成するとともに該シール空間内部にペン先を収容し、ペン先突出時に、前記開閉部材が前端孔を開口させ且つ前記シール空間を開放することを特徴とする出没式筆記具。 The cursive body includes a nib, an ink tank that directly stores ink, and an ink reservoir member that is disposed between the nib and the ink tank and temporarily retains the overflow ink that accompanies an increase in the internal pressure of the ink tank. An air passage that communicates the inside of the ink tank and the outside air, the writing body is accommodated in the shaft cylinder so as to be movable in the front-rear direction, and the pen tip of the writing body can be projected and retracted from the front end hole of the shaft cylinder An open / close type writing instrument provided with an opening / closing member at the front end portion of the shaft cylinder, and an annular seal body provided inside the shaft cylinder behind the front end hole. When the pen tip is inserted, the opening / closing member closes the front end hole. In addition, when the seal body is in close contact with the outer peripheral surface of the writing body, a seal space sealed inside the shaft cylinder is formed and a pen tip is accommodated in the seal space. A front end hole and the seal Slide type writing instrument, which comprises opens between. 筆記体の外面に通気路の開口部を設け、ペン先没入時に前記シール空間内部に前記通気路の開口部を位置させてなる請求項１記載の出没式筆記具。 The retractable writing instrument according to claim 1, wherein an opening portion of the air passage is provided on an outer surface of the writing body, and the opening portion of the air passage is positioned inside the seal space when the pen tip is immersed. 筆記体の外面に通気路の開口部を設け、ペン先没入時に前記通気路の開口部を前記シール体が密閉してなる請求項１記載の出没式筆記具。 The retractable writing instrument according to claim 1, wherein an opening portion of an air passage is provided on an outer surface of the writing body, and the seal body seals the opening portion of the air passage when the pen tip is immersed.

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