JP2006123336A - Writing instrument - Google Patents

Writing instrument Download PDF

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JP2006123336A
JP2006123336A JP2004314459A JP2004314459A JP2006123336A JP 2006123336 A JP2006123336 A JP 2006123336A JP 2004314459 A JP2004314459 A JP 2004314459A JP 2004314459 A JP2004314459 A JP 2004314459A JP 2006123336 A JP2006123336 A JP 2006123336A
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shaft
cap
pen tip
writing instrument
refill
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JP2004314459A
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JP4798982B2 (en
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Yoshihiro Ito
喜博 伊藤
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Pilot Ink Co Ltd
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Pilot Ink Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a writing instrument which can maintain the state of bringing a pen tip and a pen tip sealing member into sufficiently close contact with each other, when the writing instrument is capped, even if a front barrel and a rear barrel are put into a slightly incompletely screwed state, and which makes a user recognize that the front barrel and the rear barrel are attached to each other in an incompletely screwed state, when the writing instrument is capped, even if the front barrel and the rear barrel are put into the extremely incompletely screwed state. <P>SOLUTION: A refill 4 is replaceably housed inside a barrel which is composed of the front barrel 2 and the rear barrel 3, attached to each other in the state of being screwed to each other. The pen tip 41 of the refill 4 is protruded outward from a front end hole 25 of the front barrel 2. A rear end of the refill 4 abuts on an inner wall of the rear barrel 3. The pen tip sealing member 51 is provided inside a cap 5. An outer surface of the rear barrel 3 is provided with an outward protrusion which is fitted to an inward protrusion of an inner surface of the cap 5 in such a manner as to get over the inward protrusion. In the case where the cap 5 is attached when the front barrel 2 and the rear barrel 3 are attached to each other in the incompletely screwed state, a regulation wall part 52 abuts on an outer surface of the front barrel 2 before the inward protrusion of the inner surface of the cap 5 is fitted to the outward protrusion of the rear barrel 3 in such a manner as to get over the outward protrusion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、筆記具に関する。詳細には、内部にレフィルを交換可能に収容した前軸と後軸とからなる軸筒と、内部にペン先シール部材を備え且つ前記軸筒に着脱可能なキャップとからなる筆記具に関する。本発明で、「前」とは、軸筒においてペン先側を指し、キャップにおいて閉塞側を指し、「後」とは、軸筒において後軸の尾端側を指し、キャップにおいてペン先挿入用の開口側を指す。   The present invention relates to a writing instrument. More specifically, the present invention relates to a writing instrument comprising a shaft cylinder composed of a front shaft and a rear shaft in which refills are accommodated in an exchangeable manner, and a cap that is provided with a pen tip seal member and is detachable from the shaft cylinder. In the present invention, “front” refers to the pen tip side of the shaft tube, refers to the closed side of the cap, and “rear” refers to the tail end side of the rear shaft of the shaft tube, for pen tip insertion in the cap. Refers to the open side.

従来、この種の筆記具において、特許文献１には、前軸と後軸とからなる外装体にレフィルが収容され、後軸の底部にリブが形成され、該リブによって、レフィルの後端が長手方向位置を規制され、さらに、前軸の把持部より後方側に、キャップと乗り越え嵌合する嵌合突部を設けた構成が開示されている。   Conventionally, in this type of writing instrument, Patent Document 1 discloses that a refill is accommodated in an exterior body made up of a front shaft and a rear shaft, and a rib is formed at the bottom of the rear shaft. There is disclosed a configuration in which a directional position is restricted and a fitting protrusion is provided on the rear side from the grip portion of the front shaft to fit over the cap.

前記従来の筆記具は、前軸と後軸との取り付けが不完全の場合（例えば前軸と後軸との螺着が緩んだ状態の場合）、レフィルが軸筒内で前後方向にがたつくため、キャップを前軸の嵌合突部に乗り越え嵌合させると、ペン先とペン先シール部材とが十分に密接せず、ペン先の適正な密封がなしえないおそれがある。
特開２００１−３２８３９２号 In the conventional writing instrument, when the attachment between the front shaft and the rear shaft is incomplete (for example, when the screwing between the front shaft and the rear shaft is loosened), the refill rattles in the front-rear direction in the shaft cylinder. When the cap is fitted over the fitting protrusion of the front shaft, the pen tip and the pen tip seal member are not sufficiently in close contact with each other, and the pen tip may not be properly sealed.
JP 2001-328392 A

本発明は前記従来の問題点を解決するものであり、前軸と後軸との取付が僅かに不完全な状態であっても、キャップを装着した際に、ペン先とペン先シール部材との十分な密接状態を維持でき、しかも、前軸と後軸との取付がひどく不完全な状態であっても、キャップを装着した際に、取付が不完全な状態であることをユーザーに認識させることができる筆記具を提供しようとするものである。   The present invention solves the above-described conventional problems, and even when the front shaft and the rear shaft are mounted in a slightly incomplete state, the pen tip and the pen tip seal member are attached when the cap is attached. Even if the front and rear shafts are mounted in an incomplete state, the user can recognize that the mounting is incomplete when the cap is attached. It is intended to provide a writing instrument that can be made to work.

本発明は、以下を要件とする。   The present invention requires the following.

（請求項１）
互いに螺着される前軸と後軸とからなる軸筒の内部にレフィルを交換可能に収容し、前記レフィルのペン先を前軸の前端孔より外部に突出させ、前記レフィルの後端を後軸の内壁に当接させてなる筆記具本体と、内部にペン先シール部材を備え且つ前記筆記具本体のペン先側に着脱可能なキャップとからなる筆記具であって、
前記後軸の外面に、キャップ内面の内向突起と乗り越え嵌合する外向突起を設けたことを特徴とする筆記具。 (Claim 1)
A refill is accommodated in a shaft cylinder composed of a front shaft and a rear shaft that are screwed together, the pen tip of the refill projects outward from the front end hole of the front shaft, and the rear end of the refill is A writing instrument comprising a writing instrument body abutting against the inner wall of the shaft, and a cap provided with a pen tip seal member therein and detachable on the pen tip side of the writing instrument body,
A writing instrument, wherein an outward projection is provided on the outer surface of the rear shaft so as to ride over and fit with an inward projection on the inner surface of the cap.

（請求項２）
前記前軸の後端開口部の外面に雄ネジ部を設け、前記後軸の前端開口部の内面に、前記雄ネジ部と螺合可能な雌ネジ部を設け、前記後軸の前端開口部の外面に外向突起を設けた請求項１記載の筆記具。 (Claim 2)
A male screw part is provided on the outer surface of the rear end opening of the front shaft, a female screw part that can be screwed with the male screw part is provided on the inner surface of the front end opening of the rear shaft, and the front end opening of the rear shaft The writing instrument according to claim 1, wherein outward projections are provided on the outer surface.

（請求項３）
前記ペン先シール部材の後方且つ内向突起の前方のキャップ内面に規制壁部を設け、前軸と後軸との螺着が不完全な状態の筆記具本体のペン先側にキャップを装着した際、キャップ内面の内向突起が後軸外面の外向突起と乗り越え嵌合する前に、前記規制壁部が前軸の外面と当接してなる請求項１または２記載の筆記具。 (Claim 3)
When a cap is attached to the pen tip side of the writing instrument main body in a state where the regulation wall portion is provided on the inner surface of the cap behind the pen tip seal member and in front of the inward projection, and the front shaft and the rear shaft are incompletely screwed, The writing instrument according to claim 1 or 2, wherein the restriction wall portion contacts the outer surface of the front shaft before the inward projection on the inner surface of the cap gets over and fitted with the outward projection on the outer surface of the rear shaft.

請求項１により、前軸と後軸との取付が僅かに不完全な状態であっても、キャップを装着した際に、ペン先とペン先シール部材との十分な密接状態を維持できる。   According to the first aspect, even when the front shaft and the rear shaft are mounted slightly incompletely, the pen tip and the pen tip seal member can be kept in a sufficiently close state when the cap is attached.

請求項２により、外向突起を後軸の前端部に配置することができ、適正な長手寸法を備えたキャップ、及び、適正な長手寸法を備えた前軸を得る。   According to the second aspect, the outward projection can be disposed at the front end portion of the rear shaft, and a cap having a proper longitudinal dimension and a front shaft having a proper longitudinal dimension are obtained.

請求項３により、前軸と後軸との取付がひどく不完全な状態であっても、キャップを装着した際に、取付が不完全な状態であることをユーザーに認識させることができる。   According to the third aspect, even when the attachment of the front shaft and the rear shaft is severely incomplete, the user can recognize that the attachment is incomplete when the cap is attached.

本発明を実施するための最良の形態を説明する。   The best mode for carrying out the present invention will be described.

〔１〕本発明は、互いに螺着される前軸２と後軸３とからなる軸筒の内部にレフィル４を交換可能に収容し、前記レフィル４のペン先４１を前軸２の前端孔２５より外部に突出させ、前記レフィル４の後端を後軸３の内壁に当接させてなる筆記具本体と、内部にペン先シール部材５１を備え且つ前記筆記具本体のペン先４１側に着脱可能なキャップ５とからなる筆記具１であって、前記後軸３の外面に、キャップ５内面の内向突起５４と乗り越え嵌合する外向突起３２を設けたこと（請求項１）を要件とする。 [1] In the present invention, the refill 4 is exchangeably accommodated in a shaft cylinder composed of a front shaft 2 and a rear shaft 3 that are screwed together, and the nib 41 of the refill 4 is placed in the front end hole of the front shaft 2. 25. A writing instrument body that protrudes outward from 25 and has the rear end of the refill 4 abutted against the inner wall of the rear shaft 3, and a pen point seal member 51 inside, and is attachable to and detachable from the pen point 41 side of the writing instrument body It is a writing instrument 1 composed of a cap 5 and is provided with an outward projection 32 on the outer surface of the rear shaft 3 that fits over the inward projection 54 on the inner surface of the cap 5 (Claim 1).

前記筆記具１（請求項１）は、後軸３の外面に、キャップ５内面の内向突起５４と乗り越え嵌合する外向突起３２を設けたことにより、キャップ５をペン先４１側に装着し、後軸３外面の外向突起３２とキャップ５内面の内向突起５４を乗り越え嵌合した際、前軸２と後軸３との螺着が僅かに不完全な場合でも、ペン先シール部材５１とペン先４１との前後の位置関係が変化しないため、ペン先シール部材５１とペン先４１との十分な密接状態が得られる。その結果、ペン先シール部材５１によってペン先４１が適正に密封される。   The writing instrument 1 (Claim 1) is provided with an outward projection 32 on the outer surface of the rear shaft 3 that fits over the inner projection 54 on the inner surface of the cap 5, so that the cap 5 is attached to the pen tip 41 side, When the outer protrusion 32 on the outer surface of the shaft 3 and the inward protrusion 54 on the inner surface of the cap 5 are fitted over and fitted, even if the screwing between the front shaft 2 and the rear shaft 3 is slightly incomplete, the pen tip seal member 51 and the pen tip Since the front-rear positional relationship with 41 does not change, a sufficiently close state between the pen tip seal member 51 and the pen tip 41 is obtained. As a result, the nib 41 is properly sealed by the nib seal member 51.

〔２〕前記筆記具１（請求項１）において、前記前軸２の後端開口部の外面に雄ネジ部２３を設け、前記後軸３の前端開口部の内面に、前記雄ネジ部２３と螺合可能な雌ネジ部３１を設け、前記後軸３の前端開口部の外面に外向突起３２を設けたこと（請求項２）が好ましい。 [2] In the writing instrument 1 (Claim 1), a male screw portion 23 is provided on the outer surface of the rear end opening of the front shaft 2, and the male screw portion 23 is provided on the inner surface of the front end opening of the rear shaft 3. It is preferable that a threadable female thread portion 31 is provided, and an outward projection 32 is provided on the outer surface of the front end opening of the rear shaft 3 (Claim 2).

前記筆記具１（請求項２）は、後軸３の内面に雌ネジ部３１を設けたことにより、外向突起３２を後軸３の前端部に配置することができる。その結果、適正な長手寸法を備えたキャップ５、及び、適正な長手寸法を備えた前軸２を得る。   In the writing instrument 1 (Claim 2), by providing the internal thread portion 31 on the inner surface of the rear shaft 3, the outward projection 32 can be disposed at the front end portion of the rear shaft 3. As a result, the cap 5 having an appropriate longitudinal dimension and the front shaft 2 having an appropriate longitudinal dimension are obtained.

もし、後軸３の外面に雄ネジ部２３を設ける場合、外向突起３２は、雄ネジ部２３の後方の後軸３外面に設けることになる。その場合、前軸２の長手寸法を維持すると、キャップ５の長手寸法が極端に長くなるおそれがあり、逆に、キャップ５の長手寸法を維持すると、前軸２の長手寸法が極端に短くなるおそれがある。   If the male screw portion 23 is provided on the outer surface of the rear shaft 3, the outward projection 32 is provided on the outer surface of the rear shaft 3 behind the male screw portion 23. In that case, if the longitudinal dimension of the front shaft 2 is maintained, the longitudinal dimension of the cap 5 may become extremely long. Conversely, if the longitudinal dimension of the cap 5 is maintained, the longitudinal dimension of the front shaft 2 becomes extremely short. There is a fear.

〔３〕前記筆記具１（請求項１または２）において、前記ペン先シール部材５１の後方且つ内向突起５４の前方のキャップ５内面に規制壁部５２を設け、前軸２と後軸３との螺着が不完全な状態の筆記具本体のペン先４１側にキャップ５を装着した際、キャップ５内面の内向突起５４が後軸３外面の外向突起３２と乗り越え嵌合する前に、前記規制壁部５２が前軸２の外面と当接してなること（請求項３）が好ましい。 [3] In the writing instrument 1 (Claim 1 or 2), a restriction wall portion 52 is provided on the inner surface of the cap 5 at the rear of the pen point seal member 51 and at the front of the inward projection 54, so that the front shaft 2 and the rear shaft 3 When the cap 5 is mounted on the pen tip 41 side of the writing instrument main body in an incompletely screwed state, before the inward protrusion 54 on the inner surface of the cap 5 gets over the outer protrusion 32 on the outer surface of the rear shaft 3, the restriction wall It is preferable that the portion 52 is in contact with the outer surface of the front shaft 2 (Claim 3).

前記筆記具１（請求項３）は、前軸２と後軸３の螺着がひどく不完全な状態の場合（前軸２と後軸３との螺着状態が大きく緩んだ場合）であっても、規制壁部５２と前軸２外面との当接によってキャップ５の装着が阻止され、通常のキャップ装着した際に得られる乗り越え嵌合時の手応えや嵌合音が得られないため、ユーザーに前軸２と後軸３の螺着が不完全であることを知らせることができる。その結果、ユーザーが前軸２と後軸３とを螺着し直すことにより、前軸２と後軸３との完全な螺着状態が得られ、ペン先シール部材５１とペン先４１との十分な密接状態が得られる。   The writing instrument 1 (Claim 3) is in a case where the front shaft 2 and the rear shaft 3 are screwed in an extremely incomplete state (when the screwed state between the front shaft 2 and the rear shaft 3 is greatly loosened). However, the contact between the regulating wall 52 and the outer surface of the front shaft 2 prevents the cap 5 from being mounted, and the response and fitting sound at the time of over-fitting that can be obtained when a normal cap is mounted cannot be obtained. It can be informed that the front shaft 2 and the rear shaft 3 are not completely screwed together. As a result, when the user re-screws the front shaft 2 and the rear shaft 3, a completely screwed state between the front shaft 2 and the rear shaft 3 is obtained, and the pen tip seal member 51 and the pen tip 41 are connected to each other. Sufficient close contact is obtained.

図１乃至図７に本発明の実施例を示す。本実施例の筆記具１は、筆記具本体と、該筆記具本体のペン先４１側の外面に着脱自在に装着されるキャップ５とからなる。前記筆記具本体は、互いに螺着可能な前軸２と後軸３よりなる軸筒と、前記軸筒内部に交換可能に収容されるレフィル４とからなる。前記前軸２と前記後軸３とは螺着により着脱可能であるため、軸筒内に収容したレフィル４を外部に取り出して、交換することができる。   1 to 7 show an embodiment of the present invention. The writing instrument 1 of the present embodiment includes a writing instrument main body and a cap 5 that is detachably attached to the outer surface of the writing instrument main body on the pen tip 41 side. The writing instrument main body includes a shaft cylinder composed of a front shaft 2 and a rear shaft 3 that can be screwed together, and a refill 4 that is accommodated inside the shaft tube in a replaceable manner. Since the front shaft 2 and the rear shaft 3 are detachable by screwing, the refill 4 accommodated in the shaft tube can be taken out and exchanged.

・前軸
前記前軸２は、合成樹脂（例えば、ポリプロピレン）の射出成形体により得られる円筒体である。前記前軸２の外面には、先細状の前端部２１と、該前端部２１の後方に連設される把持部２２と、該把持部２２の後方に連設される雄ネジ部２３とが形成される。前記先細状の前端部２１の前端には前端孔２５が開口され、前記前端孔２５から外部に、軸筒内部に収容したレフィル４のペン先４１が突出される。前記把持部２２後方且つ前記雄ネジ部２３前方の前軸２外面には、段部２４が形成される。また、前記把持部２２の外面には、滑り止め用の凹凸、または弾性材料（ゴムまたはエラストマー）よりなる外皮を設けてもよい。 Front shaft The front shaft 2 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene). On the outer surface of the front shaft 2, there are a tapered front end portion 21, a gripping portion 22 provided continuously behind the front end portion 21, and a male screw portion 23 provided continuously behind the gripping portion 22. It is formed. A front end hole 25 is opened at the front end of the tapered front end portion 21, and the pen tip 41 of the refill 4 accommodated inside the shaft tube projects from the front end hole 25 to the outside. A step portion 24 is formed on the outer surface of the front shaft 2 behind the grip portion 22 and in front of the male screw portion 23. Moreover, you may provide the outer surface of the said holding | grip part 22 with the outer_surface | skin which consists of the unevenness | corrugation for slip prevention, or an elastic material (rubber or elastomer).

前記前軸２の内面には、レフィル４の前端部に設けた係止壁部４２ａが当接し且つレフィル４の前方移動を阻止する当接壁部２６が一体に形成される。前記当接壁部２６は、軸方向に延びる複数の板状リブからなり、前記板状リブの相互間に軸方向の通気路が形成される。   On the inner surface of the front shaft 2, an abutting wall portion 26 that abuts a locking wall portion 42 a provided at the front end portion of the refill 4 and prevents the refill 4 from moving forward is integrally formed. The contact wall portion 26 is composed of a plurality of plate-like ribs extending in the axial direction, and an axial air passage is formed between the plate-like ribs.

・後軸
前記後軸３は、合成樹脂（例えば、ポリカーボネート）の射出成形により得られる有底円筒体である。前記後軸３の前端開口部の内面には、前記前軸２の雄ネジ部２３と螺合可能な雌ネジ部３１が形成される。前記後軸３の後端部内面には、軸方向に延びる複数本のリブよりなる支持壁部３３が一体に形成される。また、前記後軸３の前端開口部の外面（即ち、雌ネジ部３１の外面）には、外向突起３２が一体に形成される。前記外向突起３２は、環状突起、または複数個が周状に分散配置される点状突起からなる。 -Rear shaft The rear shaft 3 is a bottomed cylindrical body obtained by injection molding of a synthetic resin (for example, polycarbonate). On the inner surface of the front end opening of the rear shaft 3, a female screw portion 31 that can be screwed with the male screw portion 23 of the front shaft 2 is formed. A support wall 33 made up of a plurality of ribs extending in the axial direction is integrally formed on the inner surface of the rear end portion of the rear shaft 3. An outward projection 32 is integrally formed on the outer surface of the front end opening of the rear shaft 3 (that is, the outer surface of the female screw portion 31). The outward protrusion 32 is formed of an annular protrusion or a point-like protrusion in which a plurality of protrusions are arranged in a circumferential manner.

・レフィル
前記レフィル４は、ペン先４１と、該ペン先４１の後部が圧入保持されるペン先保持筒４２と、該ペン先保持筒４２の後部が前端開口部に圧入固着されるインキ収容筒４３と、該インキ収容筒４３の後端開口部に圧入固着される尾栓４４とからなる。前記インキ収容筒４３内部には、インキ（例えば、低粘度の水性インキまたは水性ゲルインキ）と、該インキの消費に伴って前進するグリス状の追従体が充填される。 Refill The refill 4 includes a nib 41, a nib holding cylinder 42 in which the rear part of the nib 41 is press-fitted and held, and an ink storage cylinder in which the rear part of the nib holding cylinder 42 is press-fitted and fixed to the front end opening. 43 and a tail plug 44 press-fitted and fixed to the rear end opening of the ink containing cylinder 43. The ink containing cylinder 43 is filled with ink (for example, low-viscosity water-based ink or water-based gel ink) and a grease-like follower that moves forward as the ink is consumed.

・ペン先
前記ペン先４１は、ボールペンチップであり、例えば、金属製筒体（例えば、ステンレス鋼製パイプ）の前端近傍を内方へ押圧変形させることにより、ボール受け座を形成したボールペンチップ、または、金属材料（例えば、ステンレス鋼）を切削加工することによりボール受け座、ボール抱持孔、インキ流通孔等を形成したボールペンチップが挙げられる。 -Pen tip The pen tip 41 is a ball-point pen tip, for example, a ball-point pen tip that forms a ball seat by pressing and deforming the vicinity of the front end of a metal cylinder (for example, a stainless steel pipe) inward. Or the ball-point pen tip which formed the ball receiving seat, the ball holding hole, the ink circulation hole, etc. by cutting a metal material (for example, stainless steel) is mentioned.

・ペン先保持筒
ペン先保持筒４２は、合成樹脂（例えば、ポリプロピレン）の射出成形により得られる筒状体である。前記ペン先保持筒４２は、ペン先４１を保持する先細状の前部と、インキ収容筒４３の前端開口部に圧入される後部と、該前部と該後部との間に形成され、インキ収容筒４３の前端面に当接する鍔部とが一体に連設されてなる。 -Pen point holding cylinder The pen point holding cylinder 42 is a cylindrical body obtained by injection molding of synthetic resin (for example, polypropylene). The nib holding cylinder 42 is formed between a tapered front part for holding the nib 41, a rear part press-fitted into the front end opening of the ink containing cylinder 43, and the front part and the rear part. A flange that contacts the front end surface of the housing cylinder 43 is integrally provided continuously.

前記ペン先保持筒４２の鍔部の前面は、レフィル４を軸筒内に収容した際、前軸２の内面の当接壁部２６と前後方向に係止する係止する係止壁部４２ａとなる。   When the refill 4 is accommodated in the shaft tube, the front surface of the collar portion of the nib holding tube 42 is a locking wall portion 42a that locks in the front-rear direction with the contact wall portion 26 on the inner surface of the front shaft 2. It becomes.

・尾栓
前記尾栓４４は、合成樹脂（例えば、ポリプロピレン）の射出成形により得られる筒状体である。前記尾栓４４の軸心には、インキ収容筒４３内と外気とを連通させる通気孔が貫設される。前記尾栓４４の後端部の外周面は、後軸３の内面の支持壁部３３と当接され、レフィル４の前後方向の位置決めがなされる。 -Tail plug The tail plug 44 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene). A vent hole through which the inside of the ink containing cylinder 43 communicates with the outside air is provided through the shaft center of the tail plug 44. The outer peripheral surface of the rear end portion of the tail plug 44 is in contact with the support wall portion 33 on the inner surface of the rear shaft 3 so that the refill 4 is positioned in the front-rear direction.

・キャップ
前記キャップ５は、合成樹脂（例えば、ポリカーボネート）の射出成形により得られる有底筒状体である。前記キャップ５の外面にクリップ５５が一体に形成される。前記キャップ５内には、弾性材料よりなるペン先シール部材５１が圧入により固定配置される。前記ペン先シール部材５１は、ペン先４１が当接した際に弾性変形し、ペン先４１を密封すものであり、前記ペン先シール部材５１の形状は、球状、板状、凹状等、いずれであってもよい。 Cap The cap 5 is a bottomed cylindrical body obtained by injection molding of a synthetic resin (for example, polycarbonate). A clip 55 is integrally formed on the outer surface of the cap 5. A pen nib seal member 51 made of an elastic material is fixedly arranged in the cap 5 by press fitting. The nib seal member 51 is elastically deformed when the nib 41 comes into contact therewith and seals the nib 41. The nib seal member 51 has any shape such as a spherical shape, a plate shape, or a concave shape. It may be.

前記ペン先シール部材５１の後方のキャップ５内面には、軸方向に延びるリブよりなる規制壁部５２が一体に形成される。前記規制壁部５２より後方のキャップ５内面には、前軸２の外面と摺接嵌合する嵌合突部５３が一体に形成される。さらに、前記嵌合突部５３より後方のキャップ５内面（即ちキャップ５の後端開口部内面）には、内向突起５４が一体に形成される。キャップ５を筆記具本体のペン先４１側に装着した際、前記キャップ５内面の内向突起５４が、後軸３外面の外向突起３２と乗り越え嵌合する。前記内向突起５４は、外向突起３２が複数個が周状に分散配置される点状突起の場合、環状突起であることが好ましい。逆に、外向突起３２が環状突起の場合、前記内向突起５４は、複数個が周状に分散配置される点状突起であることが好ましい。   On the inner surface of the cap 5 behind the nib seal member 51, a restriction wall portion 52 made of a rib extending in the axial direction is integrally formed. On the inner surface of the cap 5 behind the restriction wall portion 52, a fitting projection 53 is formed integrally with the outer surface of the front shaft 2 for sliding contact. Further, an inward projection 54 is integrally formed on the inner surface of the cap 5 behind the fitting protrusion 53 (that is, the inner surface of the rear end opening of the cap 5). When the cap 5 is mounted on the pen tip 41 side of the writing instrument body, the inward projection 54 on the inner surface of the cap 5 gets over and fits with the outward projection 32 on the outer surface of the rear shaft 3. The inward projection 54 is preferably an annular projection when the outward projection 32 is a dot-like projection in which a plurality of the outward projections 32 are arranged in a circumferential manner. On the contrary, when the outward projection 32 is an annular projection, the inward projection 54 is preferably a point-like projection in which a plurality of the inward projections 54 are arranged in a circumferential manner.

次に本実施例の作用について説明する。   Next, the operation of this embodiment will be described.

〔１〕完全な螺着状態（図１及び図２参照）
前軸２と後軸３とが完全な螺着状態にある場合、筆記具本体内に収容されるレフィル４は、前軸２内面の当接壁部２６と、後軸３内面の支持壁部３３とにより、前後方向のがたつきなく、軸筒内に保持される。 [1] Completely screwed state (see FIGS. 1 and 2)
When the front shaft 2 and the rear shaft 3 are in a completely screwed state, the refill 4 accommodated in the writing instrument main body has a contact wall portion 26 on the inner surface of the front shaft 2 and a support wall portion 33 on the inner surface of the rear shaft 3. As a result, it is held in the shaft cylinder without shaking in the front-rear direction.

また、前軸２と後軸３とが完全な螺着状態にある筆記具本体のペン先４１側にキャップ５を装着すると、キャップ５内面の内向突起５４が、後軸３外面の外向突起３２と乗り越え嵌合する。このとき、キャップ５内のペン先シール部材５１とペン先４１とが適正に密接される。   Further, when the cap 5 is attached to the pen tip 41 side of the writing instrument body in which the front shaft 2 and the rear shaft 3 are completely screwed, the inward projection 54 on the inner surface of the cap 5 and the outward projection 32 on the outer surface of the rear shaft 3 Get over and fit. At this time, the pen tip sealing member 51 and the pen tip 41 in the cap 5 are properly brought into close contact with each other.

〔２〕僅かに不完全な螺着状態（図３及び図４参照）
前軸２と後軸３とが僅かに不完全な螺着状態（即ち螺着が少し緩んだ状態）にある場合、レフィル４は軸筒内において前後方向の僅かのがたつきを有して収容される。また、このとき、後軸３の前端と前軸２外面の段部２４との間に前後方向の僅かの隙間Ｔが形成されている。 [2] Slightly incomplete screwed state (see FIGS. 3 and 4)
When the front shaft 2 and the rear shaft 3 are in a slightly incompletely screwed state (that is, in a state where the screwing is slightly loosened), the refill 4 has a slight back and forth in the shaft cylinder. Be contained. At this time, a slight gap T in the front-rear direction is formed between the front end of the rear shaft 3 and the step portion 24 on the outer surface of the front shaft 2.

また、前軸２と後軸３とが僅かに不完全な螺着状態にある場合、キャップ５を筆記具本体のペン先４１側に装着すると、キャップ５内面の内向突起５４が、後軸３外面の外向突起３２と乗り越え嵌合する。このとき、完全な螺着状態（図１、図２）に比べて、ペン先４１との当接によるペン先シール部材５１の弾性変形量は減少するが、ペン先シール部材５１とペン先４１とが十分に密接される。尚、このとき、前記レフィル４は、ペン先４１とペン先シール部材５１との当接により、後方に押圧される。そして、前記レフィル４の後端は、後軸３内面の支持壁部３３により支持され、前軸２内面の当接壁部２６とレフィル４の保持筒の係止壁部４２ａとの間に前後方向の僅かの隙間Ｓが形成されている。   Further, when the front shaft 2 and the rear shaft 3 are in a slightly incompletely screwed state, when the cap 5 is attached to the pen tip 41 side of the writing instrument body, the inward projection 54 on the inner surface of the cap 5 is formed on the outer surface of the rear shaft 3. It fits over the outward projection 32. At this time, the amount of elastic deformation of the pen tip seal member 51 due to contact with the pen tip 41 is reduced as compared with the completely screwed state (FIGS. 1 and 2). And are close enough. At this time, the refill 4 is pressed backward by the contact between the pen tip 41 and the pen tip seal member 51. The rear end of the refill 4 is supported by a support wall portion 33 on the inner surface of the rear shaft 3, and is moved back and forth between the contact wall portion 26 on the inner surface of the front shaft 2 and the locking wall portion 42 a of the holding cylinder of the refill 4. A slight gap S in the direction is formed.

〔３〕ひどく不完全な螺着状態（図５、図６及び図７参照）
前軸２と後軸３とがひどく不完全な螺着状態（即ち螺着が大きく緩んだ状態）にある場合、レフィル４は軸筒内において前後方向の大きながたつきを有して収容される。また、このとき、後軸３の前端と前軸２外面の段部２４との間に前後方向の大きな隙間Ｔが形成されている。 [3] Severely incompletely screwed state (see FIGS. 5, 6 and 7)
When the front shaft 2 and the rear shaft 3 are severely incompletely screwed (that is, in a state where the screw is greatly loosened), the refill 4 is accommodated in the shaft cylinder with a large back and forth backlash. The At this time, a large gap T in the front-rear direction is formed between the front end of the rear shaft 3 and the step portion 24 on the outer surface of the front shaft 2.

また、前軸２と後軸３とがひどく不完全な螺着状態にある場合、キャップ５を筆記具本体のペン先４１側に装着すると、キャップ５内面の内向突起５４と後軸３外面の外向突起３２とが乗り越え嵌合する前に、キャップ５の内面の規制壁部５２が前軸２の先細状の前端部２１の外面に当接し、キャップ５の装着が阻止される。それにより、ユーザーが、前軸２と後軸３の螺着が不完全であることを認識できる。このとき、前記レフィル４は、ペン先４１とペン先シール部材５１との当接により、後方に押圧される。そして、前記レフィル４の後端は、後軸３内面の支持壁部３３により支持され、前軸２内面の当接壁部２６とレフィル４の保持筒の係止壁部４２ａとの間に前後方向の大きな隙間Ｓが形成されている。   In addition, when the front shaft 2 and the rear shaft 3 are in an extremely incompletely screwed state, when the cap 5 is mounted on the pen tip 41 side of the writing instrument body, the inward projection 54 on the inner surface of the cap 5 and the outer surface of the rear shaft 3 outward Before the protrusion 32 gets over and fits, the regulating wall portion 52 on the inner surface of the cap 5 comes into contact with the outer surface of the tapered front end portion 21 of the front shaft 2, thereby preventing the cap 5 from being attached. Thereby, the user can recognize that the front shaft 2 and the rear shaft 3 are incompletely screwed. At this time, the refill 4 is pressed backward by the contact between the pen tip 41 and the pen tip seal member 51. The rear end of the refill 4 is supported by a support wall portion 33 on the inner surface of the rear shaft 3, and is moved back and forth between the contact wall portion 26 on the inner surface of the front shaft 2 and the locking wall portion 42 a of the holding cylinder of the refill 4. A large gap S in the direction is formed.

本発明の実施例における前軸と後軸との完全な螺着状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the complete screwing state of the front axis | shaft and rear axis | shaft in the Example of this invention. 図１のＡ部拡大図である。It is the A section enlarged view of FIG. 図１における前軸と後軸との小さなネジ緩み状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the small screw loose state of the front axis | shaft and rear axis | shaft in FIG. 図３のＢ部拡大図である。It is the B section enlarged view of FIG. 図１における前軸と後軸との大きなネジ緩み状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the big screw loose state of the front axis | shaft and rear axis | shaft in FIG. 図５のＣ部拡大図である。It is the C section enlarged view of FIG. 図５のＤ部拡大図である。It is the D section enlarged view of FIG.

符号の説明Explanation of symbols

１ 筆記具
２ 前軸
２１ 前端部
２２ 把持部
２３ 雄ネジ部
２４ 段部
２５ 前端孔
２６ 当接壁部
３ 後軸
３１ 雌ネジ部
３２ 外向突起
３３ 支持壁部
４ レフィル
４１ ペン先
４２ ペン先保持筒
４２ａ 係止壁部
４３ インキ収容筒
４４ 尾栓
５ キャップ
５１ ペン先シール部材
５２ 規制壁部
５３ 嵌合突部
５４ 内向突起
５５ クリップ
Ｓ 隙間
Ｔ 隙間 DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Front shaft 21 Front end part 22 Grasping part 23 Male thread part 24 Step part 25 Front end hole 26 Abutting wall part 3 Rear shaft 31 Female thread part 32 Outward protrusion 33 Support wall part 4 Refill 41 Pen tip 42 Pen tip holding cylinder 42a Locking wall portion 43 Ink storage cylinder 44 Tail plug 5 Cap 51 Pen tip seal member 52 Restriction wall portion 53 Fitting projection 54 Inward projection 55 Clip S Clearance T Clearance

Claims (3)

互いに螺着される前軸と後軸とからなる軸筒の内部にレフィルを交換可能に収容し、前記レフィルのペン先を前軸の前端孔より外部に突出させ、前記レフィルの後端を後軸の内壁に当接させてなる筆記具本体と、内部にペン先シール部材を備え且つ前記筆記具本体のペン先側に着脱可能なキャップとからなる筆記具であって、
前記後軸の外面に、キャップ内面の内向突起と乗り越え嵌合する外向突起を設けたことを特徴とする筆記具。 A refill is accommodated in a shaft cylinder composed of a front shaft and a rear shaft that are screwed together, the pen tip of the refill projects outward from the front end hole of the front shaft, and the rear end of the refill is A writing instrument comprising a writing instrument body abutting against the inner wall of the shaft, and a cap provided with a pen tip seal member therein and detachable on the pen tip side of the writing instrument body,
A writing instrument, wherein an outward projection is provided on the outer surface of the rear shaft so as to ride over and fit with an inward projection on the inner surface of the cap. 前記前軸の後端開口部の外面に雄ネジ部を設け、前記後軸の前端開口部の内面に、前記雄ネジ部と螺着可能な雌ネジ部を設け、前記後軸の前端開口部の外面に外向突起を設けた請求項１記載の筆記具。 A male screw part is provided on the outer surface of the rear end opening of the front shaft, a female screw part that can be screwed to the male screw part is provided on the inner surface of the front end opening of the rear shaft, and the front end opening of the rear shaft The writing instrument according to claim 1, wherein outward projections are provided on the outer surface. 前記ペン先シール部材の後方且つ内向突起の前方のキャップ内面に規制壁部を設け、前軸と後軸との螺着が不完全な状態の筆記具本体のペン先側にキャップを装着した際、キャップ内面の内向突起が後軸外面の外向突起と乗り越え嵌合する前に、前記規制壁部が前軸の外面と当接してなる請求項１または２記載の筆記具。 When a cap is attached to the pen tip side of the writing instrument main body in a state where the regulation wall portion is provided on the inner surface of the cap behind the pen tip seal member and in front of the inward projection, and the front shaft and the rear shaft are incompletely screwed, The writing instrument according to claim 1 or 2, wherein the restriction wall portion contacts the outer surface of the front shaft before the inward projection on the inner surface of the cap gets over and fitted with the outward projection on the outer surface of the rear shaft.
JP2004314459A 2004-10-28 2004-10-28 Writing instrument Expired - Fee Related JP4798982B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012510386A (en) * 2008-11-28 2012-05-10 ソシエテ・ビック Writing utensils and caps having inner surface grooves for writing utensils
JP2014162190A (en) * 2013-02-27 2014-09-08 Mitsubishi Pencil Co Ltd Writing instrument component and writing instrument including component

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001334787A (en) * 2000-05-25 2001-12-04 Pilot Ink Co Ltd Structure for fitting cap of writing instrument
JP2003154783A (en) * 2001-11-21 2003-05-27 Pilot Corp Writing implement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001334787A (en) * 2000-05-25 2001-12-04 Pilot Ink Co Ltd Structure for fitting cap of writing instrument
JP2003154783A (en) * 2001-11-21 2003-05-27 Pilot Corp Writing implement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012510386A (en) * 2008-11-28 2012-05-10 ソシエテ・ビック Writing utensils and caps having inner surface grooves for writing utensils
JP2014162190A (en) * 2013-02-27 2014-09-08 Mitsubishi Pencil Co Ltd Writing instrument component and writing instrument including component

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