JP2022132250A - writing instrument - Google Patents

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JP2022132250A
JP2022132250A JP2022104772A JP2022104772A JP2022132250A JP 2022132250 A JP2022132250 A JP 2022132250A JP 2022104772 A JP2022104772 A JP 2022104772A JP 2022104772 A JP2022104772 A JP 2022104772A JP 2022132250 A JP2022132250 A JP 2022132250A
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writing
writing instrument
sliding member
state
barrel
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JP7346669B2 (en
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秀樹 瀧澤
Hideki Takizawa
貴之 牧
Takayuki Maki
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Mitsubishi Pencil Co Ltd
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Mitsubishi Pencil Co Ltd
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Priority claimed from JP2020072952A external-priority patent/JP6907375B2/en
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Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument capable of further easily switching a writing state and a non-writing state.
SOLUTION: A writing instrument 1 comprises a barrel 2, a writing body 6 slidably arranged in the barrel 2 and having a writing part on one end and an eliminating member 3, and the writing part 6a comprises a writing state of projecting from one end of the barrel 2 and a non-writing state of immersing the writing part 6a in the barrel 2, and an operation part for switching the writing state and the non-writing state is not provided on an outer surface of the writing instrument. The writing instrument 1 is further provided with a retractable mechanism for the writing part in the barrel 2, and the retractable mechanism for the writing part holds or releases the writing body 6 by shaking the writing instrument 1 in the axial direction, and the writing state and the non-writing state are switched thereby.
SELECTED DRAWING: Figure 2
COPYRIGHT: (C)2022,JPO&INPIT

Description

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

軸筒後端部に操作部を有し、操作部を前方に押圧することによって、ペン先が軸筒の先端から突出した筆記状態とペン先が軸筒内に没入した非筆記状態とが切り替えられる、いわゆるノック式であって熱変色性インクを収容した筆記具が公知である(例えば、特許文献1)。特許文献1の筆記具は、軸筒の外面に熱変色性インクの筆跡を擦過するための摩擦部が設けられている。 An operation part is provided at the rear end of the barrel, and by pushing the operation part forward, switching between a writing state in which the pen tip protrudes from the tip of the barrel and a non-writing state in which the pen tip is retracted into the barrel. A so-called knock-type writing instrument containing thermochromic ink is known (for example, Patent Document 1). The writing instrument of Patent Document 1 is provided with a friction portion for rubbing the handwriting of the thermochromic ink on the outer surface of the barrel.

国際公開第2008/105227号パンフレットWO 2008/105227 pamphlet

特許文献1に記載の筆記具では、筆記状態と非筆記状態との切り替えために、筆記具の軸筒の外周面を把持した状態から、筆記具を持ち替え、操作部を操作しなければならない。この持ち替え動作の際に筆記具を落としてしまい、筆記具を破損する虞がある。また、こうした持ち替え動作に対して煩わしさを感じる場合もある。 In the writing instrument described in Patent Document 1, in order to switch between the writing state and the non-writing state, it is necessary to change the grip of the writing instrument from the state in which the outer peripheral surface of the barrel of the writing instrument is gripped, and to operate the operation part. There is a risk that the writing instrument may be dropped and damaged during this gripping operation. In addition, there are cases in which such a holding movement is felt to be an annoyance.

本発明は、筆記状態と非筆記状態とをより簡単に切り替えることができる筆記具を提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a writing instrument that can more easily switch between a writing state and a non-writing state.

本発明の一態様によれば、軸筒と、該軸筒内に摺動可能に配置され且つ一端に筆記部を有する筆記体と、消去部材と、を具備する筆記具であって、前記筆記部が前記軸筒の一端から突出した筆記状態と前記筆記部が軸筒内に没入した非筆記状態とを有し、前記筆記状態と前記非筆記状態とを切り替える操作部が当該筆記具の外面に設けられていないことを特徴とする筆記具が提供される。 According to one aspect of the present invention, there is provided a writing instrument comprising a barrel, a writing body slidably disposed in the barrel and having a writing portion at one end thereof, and an erasing member, wherein the writing portion has a writing state protruding from one end of the barrel and a non-writing state in which the writing portion is recessed into the barrel, and an operation portion for switching between the writing state and the non-writing state is provided on the outer surface of the writing instrument. A writing instrument is provided, wherein the writing instrument is not

また、別の態様によれば、前記軸筒内に筆記部用の出没機構をさらに具備し、当該筆記具を軸線方向に振ることによって、前記筆記部用の出没機構が前記筆記体の保持又は解除を行い、それによって前記筆記状態と前記非筆記状態との切り替えが行われることを特徴とする筆記具が提供される。 Further, according to another aspect, a retractable mechanism for the writing unit is further provided in the barrel, and the retractable mechanism for the writing unit holds or releases the writing body by swinging the writing instrument in the axial direction. and thereby switching between the writing state and the non-writing state is provided.

また、別の態様によれば、前記消去部材が前記軸筒内に摺動可能に配置され且つ一端に消去部を有し、前記消去部が前記軸筒の他端から突出した消去状態と前記消去部が前記軸筒内に没入した非消去状態とを有し、前記消去状態と前記非消去状態とを切り替える操作部が当該筆記具の外面に設けられておらず、前記軸筒内に消去部用の出没機構をさらに具備し、当該筆記具を軸線方向に振ることによって、前記消去部用の出没機構が前記消去部材の保持又は解除を行い、それによって前記消去状態と前記非消去状態との切り替えが行われることを特徴とする筆記具が提供される。 According to another aspect, an erasing state in which the erasing member is slidably disposed in the barrel and has an erasing portion at one end thereof, and the erasing portion protrudes from the other end of the barrel; An erasing part has a non-erasing state in which it is recessed into the barrel, and an operation part for switching between the erasing state and the non-erasing state is not provided on the outer surface of the writing instrument, and the erasing part is in the barrel. by swinging the writing instrument in the axial direction, the retracting mechanism for the erasing section holds or releases the erasing member, thereby switching between the erasing state and the non-erasing state. is provided.

また、別の態様によれば、前記出没機構が、ボールと、前記軸筒に対して取り付けられると共に前記筆記体又は前記消去部材を収容し、前記ボールを収容する貫通孔が側面に形成された円筒状の内筒と、前記軸筒の内周面と前記内筒の外周面との間に当該筆記具の軸線方向に摺動可能に配置され、解除部と該解除部よりも内径の小さい保持部とが軸線方向に配置された円筒状の外摺動部材と、前記筆記体又は前記消去部材に取り付けられ、前記内筒内に当該筆記具の軸線方向に摺動可能に配置され、外周面に凹部を有する円筒状の内摺動部材と、を有し、当該筆記具を軸線方向に振ることによって、前記内摺動部材が摺動して前記ボールが前記凹部に収容されて、前記外摺動部材が摺動して前記保持部と該ボールとが径方向に整列して前記ボールと共に前記内摺動部材を係止し、次いで、当該筆記具を軸線方向に振ることによって、前記外摺動部材が摺動して前記解除部と該ボールとが径方向に整列して前記ボールと共に前記内摺動部材を係止解除し、前記内摺動部材が摺動して前記ボールが前記凹部から外れることを特徴とする筆記具が提供される。 Further, according to another aspect, the retracting mechanism is attached to the ball and the barrel and accommodates the writing body or the erasing member, and a through hole for accommodating the ball is formed in the side surface. A cylindrical inner cylinder, and a holding part having an inner diameter smaller than that of the releasing part, which is disposed between the inner peripheral surface of the barrel and the outer peripheral surface of the inner cylinder so as to be slidable in the axial direction of the writing instrument. and a cylindrical outer sliding member arranged in the axial direction; and a cylindrical inner sliding member having a recess, and by swinging the writing instrument in the axial direction, the inner sliding member slides and the ball is accommodated in the recess and slides outward. A member slides to align the holding portion and the ball in the radial direction to lock the inner sliding member together with the ball, and then swing the writing instrument in the axial direction to move the outer sliding member. slides to align the releasing portion and the ball in the radial direction to unlock the inner sliding member together with the ball, and the inner sliding member slides to disengage the ball from the recess. There is provided a writing instrument characterized by:

各態様によれば、筆記状態と非筆記状態とをより簡単に切り替えることができるという共通の効果を奏する。 According to each aspect, there is a common effect that the writing state and the non-writing state can be switched more easily.

本発明の第1実施形態による筆記具の筆記状態の正面図である。It is a front view of the writing state of the writing instrument according to the first embodiment of the present invention. 図1の線A-Aにおける縦断面図である。FIG. 2 is a longitudinal sectional view taken along line AA of FIG. 1; 図1の筆記具の非筆記状態の縦断面図である。2 is a vertical sectional view of the writing instrument of FIG. 1 in a non-writing state; FIG. 図1の筆記具の内筒の斜視図である。FIG. 2 is a perspective view of an inner cylinder of the writing instrument of FIG. 1; 図4の内筒の縦断面図である。FIG. 5 is a longitudinal sectional view of the inner cylinder of FIG. 4; 図1の筆記具の外摺動部材の斜視図である。2 is a perspective view of an outer sliding member of the writing instrument of FIG. 1; FIG. 図6の外摺動部材の縦断面図である。FIG. 7 is a longitudinal sectional view of the outer sliding member of FIG. 6; 図1の筆記具の内摺動部材の斜視図である。2 is a perspective view of an inner sliding member of the writing instrument of FIG. 1; FIG. 図8の内摺動部材の縦断面図である。FIG. 9 is a longitudinal sectional view of the inner sliding member of FIG. 8; 図1の筆記具の解除部材の斜視図である。2 is a perspective view of a release member of the writing instrument of FIG. 1; FIG. 図10の解除部材の縦断面図である。FIG. 11 is a longitudinal sectional view of the release member of FIG. 10; 図1の筆記具の非筆記状態から筆記状態への遷移を説明する縦断面図である。FIG. 2 is a vertical cross-sectional view illustrating the transition of the writing instrument of FIG. 1 from a non-writing state to a writing state; 図1の筆記具の筆記状態から非筆記状態への遷移を説明する縦断面図である。FIG. 4 is a vertical cross-sectional view for explaining the transition from the writing state to the non-writing state of the writing instrument of FIG. 1; 本発明の第2実施形態による筆記具の消去状態の正面図である。FIG. 5 is a front view of the writing instrument in an erased state according to the second embodiment of the present invention; 図14の線B-Bにおける縦断面図である。FIG. 15 is a longitudinal sectional view taken along line BB in FIG. 14; 図14の筆記具の非消去状態の縦断面図である。FIG. 15 is a vertical cross-sectional view of the writing instrument of FIG. 14 in a non-erased state; 本発明の第3実施形態による筆記具の筆記状態の正面図である。FIG. 11 is a front view of the writing instrument in a writing state according to the third embodiment of the present invention; 図17の線C-Cにおける縦断面図である。FIG. 18 is a longitudinal sectional view taken along line CC of FIG. 17; 図17の筆記具の非筆記状態の縦断面図である。18 is a vertical sectional view of the writing instrument of FIG. 17 in a non-writing state; FIG. 図17の筆記具の内筒の斜視図である。18 is a perspective view of the inner cylinder of the writing instrument of FIG. 17; FIG. 図20の内筒の縦断面図である。FIG. 21 is a longitudinal sectional view of the inner cylinder of FIG. 20; 図17の筆記具の外摺動部材の斜視図である。Figure 18 is a perspective view of an outer slide member of the writing instrument of Figure 17; 図22の外摺動部材の縦断面図である。FIG. 23 is a longitudinal sectional view of the outer sliding member of FIG. 22; 図17の筆記具の内摺動部材の斜視図である。Figure 18 is a perspective view of an inner sliding member of the writing instrument of Figure 17; 図24の内摺動部材の縦断面図である。FIG. 25 is a longitudinal sectional view of the inner sliding member of FIG. 24;

以下、図面を参照しながら本発明の実施の形態を詳細に説明する。全図面に渡り、対応する構成要素には共通の参照符号を付す。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Corresponding elements are provided with common reference numerals throughout the drawings.

図1は、本発明の第1実施形態による筆記具1の筆記状態の正面図であり、図2は、図1の線A-Aにおける縦断面図であり、図3は、図1の筆記具1の非筆記状態の縦断面図である。 1 is a front view of a writing instrument 1 according to a first embodiment of the present invention in a writing state, FIG. 2 is a longitudinal sectional view taken along line AA in FIG. 1, and FIG. 3 is a writing instrument 1 in FIG. is a vertical cross-sectional view of the non-writing state.

筆記具1は、軸筒2と、消去部材3とを有している。軸筒2は、筒状の先軸4と、先軸4の後端部にその前端部が螺合する筒状の後軸5とを有している。先軸4の先端には、軸筒2内に収容された筆記体であるリフィル6の筆記部6aを突出させるための孔4aが形成されている。 A writing instrument 1 has a barrel 2 and an erasing member 3 . The barrel 2 has a tubular front barrel 4 and a tubular rear barrel 5 whose front end is screwed to the rear end of the front barrel 4 . The tip of the front barrel 4 is formed with a hole 4a for protruding a writing portion 6a of a refill 6, which is a writing body housed in the barrel 2. As shown in FIG.

本明細書中では、筆記具1の軸線方向において、筆記部6a側を「前」側と規定し、筆記部6aとは反対側を「後」側と規定する。また、「中心軸線」とは、筆記具1の中心軸線を意味する。さらに、筆記具1は、後述する出没機構によって、軸筒2内でリフィル6が前後方向に摺動する。このとき、筆記部6aが軸筒2、すなわち先軸4の孔4aから突出した状態を筆記状態(図2)と称し、筆記部6aが軸筒2内に没入した状態を非筆記状態(図3)と称す。 In this specification, in the axial direction of the writing instrument 1, the side of the writing section 6a is defined as the "front" side, and the side opposite to the writing section 6a is defined as the "rear" side. Also, the “center axis” means the center axis of the writing instrument 1 . Further, in the writing instrument 1, the refill 6 slides in the front-rear direction within the barrel 2 by a retracting mechanism, which will be described later. At this time, the state in which the writing portion 6a protrudes from the barrel 2, that is, the hole 4a of the front barrel 4 is called the writing state (FIG. 2), and the state in which the writing portion 6a is retracted into the barrel 2 is the non-writing state (FIG. 2). 3).

後軸5の後端部には、後壁部5aが形成されており、その中央には円形の取付開口5bが形成されている。また、後軸5の後壁部5a近傍の内壁よりも前方の内壁は、より内径が大きく形成され、従って、それらの境界部分には段部5cが形成されている。先軸4及び後軸5は、例えばポリカーボネート樹脂といった樹脂材料から形成される。 A rear wall portion 5a is formed at the rear end portion of the rear shaft 5, and a circular attachment opening 5b is formed in the center thereof. Further, the inner wall of the rear axle 5 near the rear wall portion 5a is formed to have a larger inner diameter than the inner wall near the rear wall portion 5a. The front barrel 4 and the rear barrel 5 are made of a resin material such as polycarbonate resin.

リフィル6として、熱変色インクを収容したボールペン、熱変色芯を収容したシャープペンシル、消しゴム消去性インクを収容したサインペン、鉛筆ホルダー等を使用することができる。 As the refill 6, a ballpoint pen containing thermochromic ink, a mechanical pencil containing a thermochromic core, a felt-tip pen containing eraser erasable ink, a pencil holder, or the like can be used.

本実施形態におけるリフィル6は、熱変色性インクを収容する。熱変色性インクとは、常温(例えば25℃)で所定の色彩(第1色)を維持し、所定温度(例えば60℃)まで昇温させると別の色彩(第2色)へと変化し、その後、所定温度(例えば-5℃)まで冷却させると、再び元の色彩(第1色)へと復帰する性質を有するインクを言う。熱変色性インクを用いた筆記具1では上記第2色を無色とし、第1色(例えば赤)で筆記した描線を昇温させて無色とすることを、ここでは「消去する」ということとする。従って、描線が筆記された紙面等に対して摩擦体としての消去部材3によって擦過して摩擦熱を生じさせ、それによって描線を無色に変化、すなわち消去させる。なお、当然のことながら上記第2色は、無色以外の有色でも良い。 The refill 6 in this embodiment contains thermochromic ink. Thermochromic ink maintains a predetermined color (first color) at room temperature (eg, 25° C.) and changes to another color (second color) when heated to a predetermined temperature (eg, 60° C.). It is an ink that returns to its original color (first color) when cooled to a predetermined temperature (for example, −5° C.). In the writing instrument 1 using the thermochromic ink, the second color is made colorless, and the drawing line drawn with the first color (for example, red) is heated to become colorless. . Therefore, the eraser member 3 as a friction body rubs against the paper surface or the like on which the drawn line is written to generate frictional heat, thereby making the drawn line colorless, that is, erasing it. In addition, as a matter of course, the second color may be colored other than colorless.

なお、本発明における「消去」とは、上記熱変色性インクを用いた場合以外にも、筆記した描線、文字等を消しゴム等の消去部材で吸着又は削ぎ落とすことをいう。従って、本発明は、筆記した描線を、消去部材を用いて消去する任意の筆記具にも適用可能である。 In the present invention, "erasing" refers to sucking or scraping off drawn lines, characters, etc., with an erasing member such as an eraser, in addition to the case of using the thermochromic ink. Therefore, the present invention is applicable to any writing instrument that erases drawn lines using an erasing member.

消去部材3は、全体として円柱状に形成されている。消去部材3の一端は、平坦に形成され、その中央には取付突起3aが形成されている。取付突起3aは、後軸5の後壁部5aに形成された取付開口5b内に圧入等によって取り付けられている。消去部材3の他端には、凸曲面上の消去部3bが形成されている。さらに、消去部材3の中心軸線に沿って、消去部材3を貫通する通気孔3cが形成されている。消去部材3に通気孔3cが形成されていることによって、軸筒2の内部と外部とが連通している。なお、消去部材3の形状は、特に限定されるものではなく、例えば、三角柱状、直方体、表面に凹凸や突起を有する複雑な形状としても良い。 The erasing member 3 is formed in a cylindrical shape as a whole. One end of the erasing member 3 is formed flat, and a mounting projection 3a is formed in the center thereof. The mounting projection 3a is mounted in a mounting opening 5b formed in the rear wall portion 5a of the rear axle 5 by press fitting or the like. At the other end of the erasing member 3, an erasing portion 3b having a convex curved surface is formed. Further, a ventilation hole 3c is formed through the erasing member 3 along the central axis of the erasing member 3 . The inside and outside of the barrel 2 communicate with each other by forming the ventilation holes 3c in the erasing member 3. As shown in FIG. The shape of the erasing member 3 is not particularly limited, and may be, for example, a triangular prism, a rectangular parallelepiped, or a complicated shape having unevenness or projections on the surface.

摩擦体としての消去部材3を形成する材料として、シリコーンゴム、ニトリルゴム、エチレンプロピレンゴム、エチレンプロピレンジエンゴム等のゴム材質やスチレン系エラストマー、オレフィン系エラストマー、ポリエステル系エラストマー等の熱可塑性エラストマーといったゴム弾性材料、2種以上のゴム弾性材料の混合物、及び、ゴム弾性材料と合成樹脂との混合物、市販されている消しゴム等が挙げられる。 Materials for forming the erasing member 3 as a friction body include rubber materials such as silicone rubber, nitrile rubber, ethylene propylene rubber, and ethylene propylene diene rubber, and thermoplastic elastomers such as styrene elastomers, olefin elastomers, and polyester elastomers. Examples include elastic materials, mixtures of two or more rubber elastic materials, mixtures of rubber elastic materials and synthetic resins, commercially available erasers, and the like.

軸筒2内、特に後軸5内には、出没機構が配置されている。出没機構は、内筒7と、外摺動部材8と、内摺動部材9と、ボール10と、解除部材11と、コイルスプリング13とを有している。 A retractable mechanism is arranged inside the barrel 2, particularly inside the rear axle 5. As shown in FIG. The retracting mechanism has an inner cylinder 7 , an outer sliding member 8 , an inner sliding member 9 , a ball 10 , a releasing member 11 and a coil spring 13 .

図4は、図1の筆記具1の内筒7の斜視図であり、図5は、図4の内筒7の縦断面図である。内筒7は、円筒状の内筒本体7aと、大径フランジ部7bと、小径フランジ部7cとを有している。大径フランジ部7bは、内筒本体7aの前端部に形成され、内筒本体7aよりも大きな径を有する環状の突起である。小径フランジ部7cは、大径フランジ部7bの後方に形成され、内筒本体7aの径よりも大きく且つ大径フランジ部7bの径よりも小さい径を有する環状の突起である。内筒本体7aの側面には、貫通孔7dが形成されている。内筒7の大径フランジ部7bの内面には、その他の部分の内径よりも小さい径の内面を有する小径部7eが形成されている。内筒7は、例えばポリカーボネート樹脂といった樹脂材料等から形成される。 4 is a perspective view of the inner cylinder 7 of the writing instrument 1 of FIG. 1, and FIG. 5 is a longitudinal sectional view of the inner cylinder 7 of FIG. The inner cylinder 7 has a cylindrical inner cylinder main body 7a, a large-diameter flange portion 7b, and a small-diameter flange portion 7c. The large-diameter flange portion 7b is formed at the front end portion of the inner cylinder main body 7a and is an annular protrusion having a diameter larger than that of the inner cylinder main body 7a. The small-diameter flange portion 7c is formed behind the large-diameter flange portion 7b and is an annular projection having a diameter larger than that of the inner cylinder body 7a and smaller than that of the large-diameter flange portion 7b. 7 d of through-holes are formed in the side surface of the inner cylinder main body 7a. The inner surface of the large-diameter flange portion 7b of the inner cylinder 7 is formed with a small-diameter portion 7e having an inner surface with a smaller diameter than the inner diameter of the other portions. The inner cylinder 7 is made of a resin material such as polycarbonate resin.

図6は、図1の筆記具1の外摺動部材8の斜視図であり、図7は、図6の外摺動部材8の縦断面図である。外摺動部材8は全体として円筒状の部材であり、外摺動部材8の外径は後軸5の内径よりも小さい。外摺動部材8の軸線方向の中央部分の内面には、その他の部分の内径よりも小さい径の内面を有する保持部である厚肉部8aが形成されている。すなわち、厚肉部8a以外のその他の部分は、解除部である薄肉部8bを構成する。外摺動部材8の厚肉部8aの内径は、内筒7の内筒本体7aの外径よりも大きく、且つ、内筒7の小径フランジ部7cの外径よりも小さい。外摺動部材8の厚肉部8aの前端及び後端には、外摺動部材8の薄肉部8bの内面に連続的に接続する斜面であるテーパ面8cが、環状に形成されている。外摺動部材8は、例えばステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料から形成しても良い。 6 is a perspective view of the outer sliding member 8 of the writing instrument 1 of FIG. 1, and FIG. 7 is a longitudinal sectional view of the outer sliding member 8 of FIG. The outer sliding member 8 is a cylindrical member as a whole, and the outer diameter of the outer sliding member 8 is smaller than the inner diameter of the rear shaft 5 . The inner surface of the central portion of the outer sliding member 8 in the axial direction is formed with a thick portion 8a as a holding portion having an inner surface with a smaller diameter than the inner diameter of the other portions. That is, the portion other than the thick portion 8a constitutes the thin portion 8b, which is the releasing portion. The inner diameter of the thick portion 8a of the outer sliding member 8 is larger than the outer diameter of the inner cylinder main body 7a of the inner cylinder 7 and smaller than the outer diameter of the small-diameter flange portion 7c of the inner cylinder 7 . At the front and rear ends of the thick portion 8a of the outer sliding member 8, tapered surfaces 8c, which are inclined surfaces continuously connected to the inner surface of the thin portion 8b of the outer sliding member 8, are formed in an annular shape. The outer sliding member 8 is preferably made of a metal material such as stainless steel, but may be made of a resin material or a resin material mixed with metal powder.

図8は、図1の筆記具1の内摺動部材9の斜視図であり、図9は、図8の内摺動部材9の縦断面図である。内摺動部材9は、円筒部9aと錘部9bとを有する全体として円筒状の部材である。すなわち、内摺動部材9の後端部分は、中実に形成され、錘部9bを構成し、錘部9bより前方の部分は、円筒状の円筒部9aである。内摺動部材9の外径は、内筒7の小径部7eの内径よりも大きく、内筒7のその他の部分の内径よりも小さい。円筒部9aと錘部9bとの境界近傍の錘部9bの外周面には、環状の凹部9cが形成されている。内摺動部材9は、例えば比重のあるステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料、エラストマー等のゴム弾性材料から形成しても良い。 8 is a perspective view of the inner sliding member 9 of the writing instrument 1 of FIG. 1, and FIG. 9 is a longitudinal sectional view of the inner sliding member 9 of FIG. The inner sliding member 9 is a generally cylindrical member having a cylindrical portion 9a and a weight portion 9b. That is, the rear end portion of the inner sliding member 9 is formed solid and constitutes a weight portion 9b, and the portion in front of the weight portion 9b is a cylindrical portion 9a. The outer diameter of the inner sliding member 9 is larger than the inner diameter of the small diameter portion 7 e of the inner cylinder 7 and smaller than the inner diameter of the other portion of the inner cylinder 7 . An annular recessed portion 9c is formed on the outer peripheral surface of the weight portion 9b near the boundary between the cylindrical portion 9a and the weight portion 9b. The inner sliding member 9 is preferably made of a metal material such as stainless steel having a specific gravity, but it may be made of a resin material, a resin material mixed with metal powder, or a rubber elastic material such as an elastomer. good.

図10は、図1の筆記具1の解除部材11の斜視図であり、図11は、図10の解除部材11の縦断面図である。解除部材11は、円筒状の解除部材本体11aと、フランジ部11bとを有している。フランジ部11bは、解除部材本体11aの前端部に形成され、解除部材本体11aよりも大きな径を有する環状の突起である。フランジ部11bの外径は、後軸5の内径よりも小さい。解除部材本体11aの内面には、その他の部分の内径よりも小さい径の内面を有する小径部11cが形成されている。解除部材本体11aの小径部11cの内径は、内筒7の内筒本体7aの外径よりも大きく、且つ、内筒7の小径フランジ部7cの外径よりも小さい。解除部材本体11aの小径部11c以外のその他の部分の内径は、内筒7の小径フランジ部7cの外径よりも大きい。解除部材本体11aの小径部11cの前端及び後端には、解除部材本体11aのその他の部分の内面に連続的に接続する斜面であるテーパ面11dが、環状に形成されている。解除部材11は、例えばステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料から形成しても良い。 10 is a perspective view of the release member 11 of the writing instrument 1 of FIG. 1, and FIG. 11 is a longitudinal sectional view of the release member 11 of FIG. The releasing member 11 has a cylindrical releasing member main body 11a and a flange portion 11b. The flange portion 11b is an annular projection formed at the front end portion of the releasing member main body 11a and having a diameter larger than that of the releasing member main body 11a. The outer diameter of the flange portion 11 b is smaller than the inner diameter of the rear axle 5 . A small-diameter portion 11c having an inner surface smaller in diameter than the inner diameter of the other portion is formed on the inner surface of the releasing member main body 11a. The inner diameter of the small-diameter portion 11c of the release member main body 11a is larger than the outer diameter of the inner cylinder main body 7a of the inner cylinder 7 and smaller than the outer diameter of the small-diameter flange portion 7c of the inner cylinder 7 . The inner diameter of the portion other than the small-diameter portion 11c of the release member main body 11a is larger than the outer diameter of the small-diameter flange portion 7c of the inner cylinder 7 . At the front and rear ends of the small diameter portion 11c of the release member main body 11a, a tapered surface 11d, which is an inclined surface continuously connected to the inner surface of the rest of the release member main body 11a, is formed in an annular shape. The release member 11 is preferably made of a metal material such as stainless steel, but may be made of a resin material or a resin material mixed with metal powder.

ボール10は、内筒7の貫通孔7dに収容可能な大きさの球形に形成され、例えばステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料から形成しても良い。 The ball 10 is formed into a spherical shape having a size that can be accommodated in the through hole 7d of the inner cylinder 7, and is preferably made of a metal material such as stainless steel. You may form from a material.

図2又は図3を参照すると、内筒7の後方から、内筒7の内筒本体7aの外側に対して、コイルスプリング13、解除部材11、ボール10及び外摺動部材8の順に、取り付けられる。また、内筒7の後方から、内筒7の内側に対して、内摺動部材9が取り付けられる。この状態で、出没機構を、後軸5内に前方から挿入すると、内筒7の後端面が後軸5の後壁部5aに当接すると共に内筒7の大径フランジ部7bと後軸5の内面とが圧入によって固定される。ボール10は、内筒7の貫通孔7d内に収容された状態で、外摺動部材8と内摺動部材9との間に常に配置されている。 2 or 3, the coil spring 13, the releasing member 11, the ball 10 and the outer sliding member 8 are attached in this order from the rear of the inner cylinder 7 to the outside of the inner cylinder main body 7a of the inner cylinder 7. be done. Also, an inner sliding member 9 is attached to the inner side of the inner cylinder 7 from behind the inner cylinder 7 . In this state, when the retracting mechanism is inserted into the rear shaft 5 from the front, the rear end surface of the inner cylinder 7 abuts against the rear wall portion 5a of the rear shaft 5 and the large-diameter flange portion 7b of the inner cylinder 7 and the rear shaft 5. are fixed by press fitting. The ball 10 is always arranged between the outer sliding member 8 and the inner sliding member 9 while being accommodated in the through hole 7 d of the inner cylinder 7 .

従って、後軸5の内周面と内筒7の外周面との間に、解除部材11、ボール10及び外摺動部材8が摺動可能に配置され、内筒7内に、内摺動部材9が摺動可能に配置される。解除部材11の摺動は、コイルスプリング13の弾発力によって前方への摺動が規制され、外摺動部材8の前端面によって後方への摺動が規制される。コイルスプリング13の前端は、内筒7の大径フランジ部7bの後端面によって支持される。外摺動部材8の摺動は、解除部材11の後端面によって前方への摺動が規制され、後軸5の段部5cによって後方への摺動が規制される。内摺動部材9の摺動は、内筒7の小径部7eの後端面によって前方への移動が規制され、後軸5の後壁部5aによって後方への摺動が規制される。 Therefore, the releasing member 11, the ball 10 and the outer sliding member 8 are slidably arranged between the inner peripheral surface of the rear axle 5 and the outer peripheral surface of the inner cylinder 7, and the inner sliding member 8 is arranged inside the inner cylinder 7. A member 9 is slidably arranged. As for the sliding of the release member 11 , forward sliding is restricted by the elastic force of the coil spring 13 , and rearward sliding is restricted by the front end surface of the outer sliding member 8 . The front end of the coil spring 13 is supported by the rear end surface of the large-diameter flange portion 7b of the inner cylinder 7. As shown in FIG. As for the sliding of the outer sliding member 8 , forward sliding is restricted by the rear end surface of the release member 11 , and rearward sliding is restricted by the stepped portion 5 c of the rear axle 5 . The sliding of the inner sliding member 9 is restricted by the rear end surface of the small-diameter portion 7 e of the inner cylinder 7 , and is restricted by the rear wall portion 5 a of the rear shaft 5 .

リフィル6は、円筒状のガイド管12内に摺動可能に挿入される。ガイド管12の後端部は、内筒7の前端部に対して圧入によって取り付けられる。すなわち、ガイド管12は、ガイド管12の後端面が内筒7の小径部7eの前端面に当接するまで内筒7内に挿入される。また、リフィル6は、先軸4内に配置されたコイルスプリング14によって後方へ付勢されている。 The refill 6 is slidably inserted into the cylindrical guide tube 12 . The rear end of the guide tube 12 is attached to the front end of the inner cylinder 7 by press fitting. That is, the guide tube 12 is inserted into the inner cylinder 7 until the rear end surface of the guide tube 12 contacts the front end surface of the small diameter portion 7 e of the inner cylinder 7 . Further, the refill 6 is urged rearward by a coil spring 14 arranged inside the front barrel 4 .

図12は、図1の筆記具1の非筆記状態から筆記状態への遷移を説明する縦断面図である。図12の(a)は、筆記具1の非筆記状態のときの出没機構を示している。内筒7の貫通孔7d内に収容されたボール10は、外摺動部材8の薄肉部8bと内摺動部材9の凹部9c以外の外周面との間に配置されている。この状態で、筆記具1を軸線方向前方に移動させて、この移動を瞬間的に停止させると、筆記具1内部の出没機構は、前方向の慣性力を受ける。筆記具1の移動と瞬間的な停止は、例えば、使用者が筆記する際に筆記具1を把持しながら軸線方向に振る動作によって行われる。 FIG. 12 is a vertical cross-sectional view for explaining the transition of the writing instrument 1 of FIG. 1 from the non-writing state to the writing state. FIG. 12(a) shows the retraction mechanism when the writing instrument 1 is in the non-writing state. The ball 10 accommodated in the through hole 7d of the inner cylinder 7 is arranged between the thin portion 8b of the outer sliding member 8 and the outer peripheral surface of the inner sliding member 9 other than the recessed portion 9c. In this state, when the writing instrument 1 is moved forward in the axial direction and this movement is momentarily stopped, the retracting mechanism inside the writing instrument 1 receives forward inertial force. The movement and momentary stoppage of the writing instrument 1 are performed, for example, by the user holding the writing instrument 1 and swinging it in the axial direction when writing.

前方向の慣性力を受けた出没機構は、内摺動部材9がリフィル6と共に内筒7内を前方へ向かって摺動する。その結果、ボール10が内摺動部材9の凹部9c内へ嵌合する。次いで、外摺動部材8が、後軸5と内筒7との間を前方へ向かって摺動して、テーパ面8cがボール10に対して当接する。(図12(b))。 In the retraction mechanism that receives forward inertial force, the inner sliding member 9 slides forward in the inner cylinder 7 together with the refill 6 . As a result, the balls 10 are fitted into the recesses 9c of the inner sliding member 9. As shown in FIG. Next, the outer sliding member 8 slides forward between the rear shaft 5 and the inner cylinder 7 , and the tapered surface 8 c abuts against the ball 10 . (FIG. 12(b)).

次いで、外摺動部材8は慣性力によってそのまま摺動を継続し、テーパ面8cによって案内されることによってボール10を乗り越え、厚肉部8aによってボール10と共に内摺動部材9を係止する(図12(c))。すなわち、外摺動部材8の厚肉部8aとボール10とが径方向に整列してボール10と共に内摺動部材9を係止する。このとき、リフィル6の先端の筆記部6aが先軸4の先端の孔4aから突出した状態で、リフィル6が出没機構によって保持されることから、筆記具1は筆記状態となっている。この状態で筆記を行うと、筆圧によって、内摺動部材9が後方へ摺動する方向、すなわち外摺動部材8の厚肉部8aがボール10と及び内摺動部材9に係止する方向に力が作用するため、筆記状態が解除されることはない。 Next, the outer sliding member 8 continues to slide due to its inertial force, gets over the ball 10 by being guided by the tapered surface 8c, and locks the inner sliding member 9 together with the ball 10 by the thick portion 8a ( FIG. 12(c)). That is, the thick portion 8a of the outer sliding member 8 and the ball 10 are aligned in the radial direction, and the inner sliding member 9 is locked together with the ball 10. As shown in FIG. At this time, the refill 6 is held by the retraction mechanism with the writing portion 6a at the tip of the refill 6 protruding from the hole 4a at the tip of the front barrel 4, so that the writing instrument 1 is in the writing state. When writing is performed in this state, the direction in which the inner sliding member 9 slides rearward by the writing pressure, that is, the thick portion 8a of the outer sliding member 8 engages the ball 10 and the inner sliding member 9. Since the force acts in the direction, the writing state is never released.

図13は、図1の筆記具1の筆記状態から非筆記状態への遷移を説明する縦断面図である。図13の(a)は、筆記具1の筆記状態のときの出没機構を示している。すなわち、図13の(a)は、図12(c)と略同一の状態を示している。この状態で、筆記具1を軸線方向前方に移動させて、この移動を瞬間的に停止させると、筆記具1内部の出没機構は、前方向の慣性力を受ける。筆記具1の移動と瞬間的な停止は、例えば、使用者が筆記する際に筆記具1を把持しながら軸線方向に振る動作によって行われる。また、筆記具1を停止状態から軸線方向前方へ移動させる瞬間、すなわち使用者が筆記具1を振る瞬間は、筆記具1内部の出没機構は、後方向の慣性力を受ける。 FIG. 13 is a vertical cross-sectional view for explaining the transition from the writing state to the non-writing state of the writing instrument 1 of FIG. FIG. 13(a) shows the retraction mechanism when the writing instrument 1 is in the writing state. That is, FIG. 13(a) shows substantially the same state as FIG. 12(c). In this state, when the writing instrument 1 is moved forward in the axial direction and this movement is momentarily stopped, the retracting mechanism inside the writing instrument 1 receives forward inertial force. The movement and momentary stoppage of the writing instrument 1 are performed, for example, by the user holding the writing instrument 1 and swinging it in the axial direction when writing. Further, at the moment when the writing instrument 1 is moved forward in the axial direction from the stopped state, that is, at the moment when the user swings the writing instrument 1, the retracting mechanism inside the writing instrument 1 receives a rearward inertial force.

筆記状態の筆記具1において、外摺動部材8及び内摺動部材9は、ボール10と共に係止しているが、解除部材11は、摺動可能な状態にある。このため、出没機構が前方向の慣性力を受けると、解除部材11が前方へ向かって摺動し、コイルスプリング13によって弾発し、運動方向が後方へ転換する。すなわち、解除部材11は後方へ向かって摺動し、その後端面が、外摺動部材8の前端面に衝突する。それによって、外摺動部材8は後方へ摺動し、厚肉部8aによる内摺動部材9及びボール10との係止が解除される(図13(b))。すなわち、薄肉部8bとボール10とが径方向に整列して、ボール10が内摺動部材9の凹部9cから外れ、出没機構によるリフィル6の保持が解除される。 In the writing instrument 1 in the writing state, the outer sliding member 8 and the inner sliding member 9 are locked together with the ball 10, but the releasing member 11 is in a slidable state. Therefore, when the retraction mechanism receives a forward inertial force, the release member 11 slides forward and is elastically actuated by the coil spring 13, thereby changing the movement direction backward. That is, the release member 11 slides rearward, and the rear end face collides with the front end face of the outer sliding member 8 . As a result, the outer sliding member 8 slides rearward, and the locking of the inner sliding member 9 and the ball 10 by the thick portion 8a is released (FIG. 13(b)). That is, the thin portion 8b and the ball 10 are aligned in the radial direction, the ball 10 is removed from the concave portion 9c of the inner sliding member 9, and the holding of the refill 6 by the retraction mechanism is released.

その結果、先軸4内に配置されたコイルスプリング14の付勢力によって内摺動部材9が後方へ向かって摺動する(図13(c))。従って、リフィル6の先端の筆記部6aは、先軸4の先端の孔4aから軸筒2内に没入し、筆記具1は非筆記状態となる。 As a result, the inner sliding member 9 slides rearward due to the biasing force of the coil spring 14 arranged in the front barrel 4 (FIG. 13(c)). Therefore, the writing portion 6a at the tip of the refill 6 is retracted into the barrel 2 through the hole 4a at the tip of the front barrel 4, and the writing instrument 1 is in a non-writing state.

なお、出没機構が後方向の慣性力を受けることによって、外摺動部材8が後方へ向かって摺動し、内摺動部材9及びボール10との係止が解除されるようにしても良い。この場合、解除部材11は省略できる。 It should be noted that the retraction mechanism may receive an inertial force in the rearward direction, so that the outer sliding member 8 slides rearward and the engagement between the inner sliding member 9 and the ball 10 is released. . In this case, the releasing member 11 can be omitted.

また、内摺動部材9の錘部9bの重さや位置及びバランスを調整することによって、筆記具1全体の重心を、筆記具1を把持して筆記するのに最も適した位置に調整することができる。 Further, by adjusting the weight, position, and balance of the weight portion 9b of the inner sliding member 9, the center of gravity of the writing instrument 1 as a whole can be adjusted to the most suitable position for gripping the writing instrument 1 and writing. .

本発明によれば、単に筆記具1を軸線方向に振ることによって、筆記具1の筆記状態と非筆記状態とを簡単に切り替えることができる。また、筆記具1を軸線方向に振ることによってこれらの切り替えを行うことから、筆記具1の軸筒2の外周面を把持した状態から、筆記具を持ち替える必要はなく、それによる煩わしさや筆記具を落とす危険性もない。また、筆記具1を軸線方向に振ることによってこれらの切り替えを行うことから、筆記具1の外面に対してノック棒のような操作部又は操作機構を設ける必要がなく、筆記具の外観を自由にデザインすることができる。 According to the present invention, the writing state and the non-writing state of the writing instrument 1 can be easily switched by simply swinging the writing instrument 1 in the axial direction. In addition, since these are switched by swinging the writing instrument 1 in the axial direction, there is no need to change the grip of the writing instrument from the state where the outer peripheral surface of the barrel 2 of the writing instrument 1 is gripped, which is troublesome and the danger of dropping the writing instrument. Nor. In addition, since these switching operations are performed by swinging the writing instrument 1 in the axial direction, there is no need to provide an operating part or an operating mechanism such as a knock bar on the outer surface of the writing instrument 1, and the appearance of the writing instrument can be freely designed. be able to.

図14は、本発明の第2実施形態による筆記具100の消去状態の正面図であり、図15は、図14の線B-Bにおける縦断面図であり、図16は、図14の筆記具100の非消去状態の縦断面図である。 14 is a front view of the writing instrument 100 according to the second embodiment of the present invention in an erased state, FIG. 15 is a longitudinal sectional view taken along line BB of FIG. 14, and FIG. 16 is the writing instrument 100 of FIG. is a vertical cross-sectional view of the non-erased state.

筆記具100は、両端から同一又は異なる筆記部等を突出可能な、いわゆる両頭式の筆記具である。すなわち、筆記具100は、第1筆記具101と第2筆記具102とからなり、それぞれ中央部分で連結しているか又は一体として形成される。 The writing instrument 100 is a so-called double-headed writing instrument in which the same or different writing parts or the like can protrude from both ends. That is, the writing instrument 100 is composed of a first writing instrument 101 and a second writing instrument 102, which are connected at the central portion or integrally formed.

第1筆記具101は、第1軸筒110を有している。第1軸筒110は、筒状の第1筒状部材111と、第1筒状部材111の一端にその一端が螺合する筒状の第2筒状部材112とを有している。第2筆記具102は、第2軸筒120を有している。第2軸筒120は、筒状の第1筒状部材121と、第1筒状部材121の一端にその一端が螺合する筒状の第2筒状部材122とを有している。 The first writing instrument 101 has a first barrel 110 . The first barrel 110 has a tubular first tubular member 111 and a tubular second tubular member 112 whose one end is screwed to one end of the first tubular member 111 . The second writing instrument 102 has a second barrel 120 . The second shaft tube 120 has a tubular first tubular member 121 and a tubular second tubular member 122 having one end screwed to one end of the first tubular member 121 .

第1筆記具101の第1軸筒110内には、第1実施形態の筆記体であるリフィル6が上述した出没機構と共に収容される。従って、図12及び図13を参照しながら説明した原理によって、第1筆記具101の筆記状態と非筆記状態とを切り替えることができる。 In the first barrel 110 of the first writing instrument 101, the refill 6, which is the writing body of the first embodiment, is accommodated together with the retraction mechanism described above. Therefore, the writing state and the non-writing state of the first writing instrument 101 can be switched according to the principle described with reference to FIGS. 12 and 13 .

第2筆記具102の第2軸筒120内には、第1実施形態の筆記体であるリフィル6と同一形状の消去部材103が上述した出没機構と共に収容される。従って、図12及び図13を参照しながら説明した原理によって、第2筆記具102消去状態と非消去状態とを切り替えることができる。すなわち、消去部材103の先端の消去部103aが第1筒状部材121から突出した状態を消去状態(図15)と称し、消去部材103の先端の消去部103aが第1筒状部材121内に没入した状態を非消去状態(図16)と称する。 In the second barrel 120 of the second writing instrument 102, an erasing member 103 having the same shape as that of the refill 6, which is the writing body of the first embodiment, is housed together with the retracting mechanism described above. Therefore, the second writing instrument 102 can be switched between the erased state and the non-erased state according to the principle described with reference to FIGS. 12 and 13. FIG. That is, the state in which the erasing portion 103a at the tip of the erasing member 103 protrudes from the first tubular member 121 is called an erased state (FIG. 15), and the erasing portion 103a at the tip of the erasing member 103 is in the first tubular member 121. The immersed state is called a non-erased state (FIG. 16).

なお、第1筆記具101又は第2筆記具102を単体として着目した場合には、基本的構成、すなわち出没機構は、それぞれ第1実施形態の筆記具1と同一である。すなわち、第1筆記具101は、第1実施形態と同一の筆記部用の出没機構を有し、第2筆記具102は、消去部用の出没機構を有している。従って、各出没機構の各構成の説明は省略する。 Note that when focusing on the first writing instrument 101 or the second writing instrument 102 as a single unit, the basic configuration, that is, the retraction mechanism, is the same as that of the writing instrument 1 of the first embodiment. That is, the first writing instrument 101 has the same retractable mechanism for the writing section as in the first embodiment, and the second writing instrument 102 has the retractable mechanism for the erasing section. Therefore, description of each configuration of each retraction mechanism is omitted.

図17は、本発明の第3実施形態による筆記具200の筆記状態の正面図であり、図18は、図17の線C-Cにおける縦断面図であり、図19は、図17の筆記具200の非筆記状態の縦断面図である。 17 is a front view of the writing instrument 200 according to the third embodiment of the present invention in a writing state, FIG. 18 is a longitudinal sectional view taken along line CC of FIG. 17, and FIG. 19 is the writing instrument 200 of FIG. is a vertical cross-sectional view of the non-writing state.

筆記具200は、軸筒202と、消去部材203とを有している。軸筒202は、筒状の先軸204と、先軸204の後端部にその前端部が螺合する筒状の後軸205とを有している。先軸204の先端には、軸筒202内に収容された筆記体であるリフィル206の筆記部206aを突出させるための孔204aが形成されている。 The writing instrument 200 has a barrel 202 and an erasing member 203 . The barrel 202 has a tubular front barrel 204 and a tubular rear barrel 205 whose front end is screwed to the rear end of the front barrel 204 . A hole 204a is formed at the tip of the front barrel 204 for protruding a writing portion 206a of a refill 206, which is a cursive body housed in the barrel 202. As shown in FIG.

本明細書中では、上述した実施形態と同様に、筆記具200の軸線方向において、筆記部206a側を「前」側と規定し、筆記部206aとは反対側を「後」側と規定する。また、「中心軸線」とは、筆記具200の中心軸線を意味する。さらに、筆記具200は、後述する出没機構によって、軸筒202内でリフィル206が前後方向に摺動する。このとき、筆記部206aが軸筒202、すなわち先軸204の孔204aから突出した状態を筆記状態(図18)と称し、筆記部206aが軸筒202内に没入した状態を非筆記状態(図19)と称す。 In this specification, in the axial direction of the writing instrument 200, the writing portion 206a side is defined as the "front" side, and the side opposite to the writing portion 206a is defined as the "rear" side, as in the above-described embodiment. Also, the “center axis” means the center axis of the writing instrument 200 . Further, in the writing instrument 200, the refill 206 slides in the front-rear direction within the barrel 202 by a retraction mechanism, which will be described later. At this time, the state in which the writing portion 206a protrudes from the barrel 202, that is, the hole 204a of the front barrel 204 is called the writing state (FIG. 18), and the state in which the writing portion 206a is retracted into the barrel 202 is the non-writing state (FIG. 18). 19).

後軸205の後端部には、後壁部205aが形成されており、その中央には後方へ突出する円柱の突出部205dが形成されている。また、後軸205の後壁部205a近傍の内壁よりも前方の内壁は、より内径が大きく形成され、従って、それらの境界部分には段部205cが形成されている。先軸204及び後軸205は、例えばポリカーボネート樹脂といった樹脂材料から形成される。 A rear wall portion 205a is formed at the rear end portion of the rear shaft 205, and a columnar projecting portion 205d projecting rearward is formed at the center of the rear wall portion 205a. Further, the inner wall of the rear axle 205 in front of the inner wall near the rear wall portion 205a is formed to have a larger inner diameter, and therefore a stepped portion 205c is formed at the boundary between them. The front barrel 204 and the rear barrel 205 are made of a resin material such as polycarbonate resin.

消去部材203は、全体として円筒状に形成されている。また、消去部材203の中心軸線に沿って、消去部材203を貫通する貫通孔203cが形成されている。消去部材203の一端は、平坦に形成され、その近傍の貫通孔203cの内壁には、取付段部203dが形成されている。消去部材203は、後軸205の後壁部205aに形成された突出部205dに圧入等によって取り付けられている。その結果、消去部材203の取付段部203dと後軸205の突出部205dとが係止することによって、消去部材203の抜けが防止される。消去部材203の他端には、凸曲面上の消去部203bが形成されている。なお、消去部材203の形状は、特に限定されるものではなく、例えば、三角柱状、直方体、表面に凹凸や突起を有する複雑な形状としても良い。 The erasing member 203 is formed in a cylindrical shape as a whole. A through hole 203c is formed through the erasing member 203 along the central axis of the erasing member 203 . One end of the erasing member 203 is formed flat, and a mounting step portion 203d is formed on the inner wall of the through hole 203c in the vicinity thereof. The erasing member 203 is attached to a projecting portion 205d formed on the rear wall portion 205a of the rear barrel 205 by press fitting or the like. As a result, the mounting step portion 203d of the erasing member 203 and the projecting portion 205d of the rear shaft 205 are engaged with each other, thereby preventing the erasing member 203 from coming off. At the other end of the erasing member 203, an erasing portion 203b having a convex curved surface is formed. The shape of the erasing member 203 is not particularly limited, and may be, for example, a triangular prism, a rectangular parallelepiped, or a complicated shape having unevenness or protrusions on the surface.

軸筒202内、特に後軸205内には、出没機構が配置されている。出没機構は、内筒207と、外摺動部材208と、内摺動部材209と、ボール10と、コイルスプリング213と、重量体215とを有している。 A retractable mechanism is arranged inside the barrel 202 , especially inside the rear axle 205 . The retracting mechanism has an inner cylinder 207 , an outer sliding member 208 , an inner sliding member 209 , a ball 10 , a coil spring 213 and a weight 215 .

図20は、図17の筆記具200の内筒207の斜視図であり、図21は、図20の内筒207の縦断面図である。内筒207は、円筒状の内筒本体207aと、大径フランジ部207bと、中径フランジ部207fと、小径フランジ部207cとを有している。大径フランジ部207bは、内筒本体207aの前端部に形成され、内筒本体207aよりも大きな径を有する環状の突起である。中径フランジ部207fは、大径フランジ部207bの後方に形成され、大径フランジ部207bの径よりも小さい径を有する環状の突起である。小径フランジ部207cは、中径フランジ部207fの後方に形成され、内筒本体207aの径よりも大きく且つ中径フランジ部207fの径よりも小さい径を有する環状の突起である。内筒本体207aの側面には、ボール10が挿入可能な貫通孔207dが3箇所径方向に対して均等に形成されている。内筒207の前端部の内面には、大径部207gが形成され、その後方には、大径部207gよりも小さい内径を有する小径部207hが形成されている。内筒207は、例えばポリカーボネート樹脂といった樹脂材料等から形成される。 20 is a perspective view of the inner cylinder 207 of the writing instrument 200 of FIG. 17, and FIG. 21 is a longitudinal sectional view of the inner cylinder 207 of FIG. The inner cylinder 207 has a cylindrical inner cylinder main body 207a, a large-diameter flange portion 207b, a medium-diameter flange portion 207f, and a small-diameter flange portion 207c. The large-diameter flange portion 207b is an annular protrusion formed at the front end portion of the inner cylinder main body 207a and having a diameter larger than that of the inner cylinder main body 207a. The medium-diameter flange portion 207f is an annular protrusion formed behind the large-diameter flange portion 207b and having a smaller diameter than the large-diameter flange portion 207b. The small-diameter flange portion 207c is formed behind the medium-diameter flange portion 207f and is an annular protrusion having a diameter larger than that of the inner cylinder main body 207a and smaller than that of the medium-diameter flange portion 207f. 207 d of through-holes which can insert the ball|bowl 10 are formed in the side surface of the inner cylinder main body 207a at three locations uniformly with respect to the radial direction. A large-diameter portion 207g is formed on the inner surface of the front end portion of the inner cylinder 207, and a small-diameter portion 207h having an inner diameter smaller than that of the large-diameter portion 207g is formed behind the large-diameter portion 207g. The inner cylinder 207 is made of a resin material such as polycarbonate resin.

図22は、図17の筆記具200の外摺動部材208の斜視図であり、図23は、図22の外摺動部材208の縦断面図である。外摺動部材208は全体として円筒状の部材であり、外摺動部材208の外径は後軸205の内径よりも小さい。外摺動部材208の後端部の内面には、保持部である厚肉部208aが形成されている。厚肉部208aの前方の部分、すなわち前端部の内面は、前端から後方に向かって内径が小さくなり且つ厚肉部208aの前端に連続的に接続する斜面であるテーパ面208cが、環状に形成されている。テーパ面208cは、解除部である。外摺動部材208の厚肉部208aの内径は、内筒207の内筒本体207aの外径よりも大きく、且つ、内筒207の小径フランジ部207cの外径よりも小さい。外摺動部材208は、例えばステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料から形成しても良い。 22 is a perspective view of the outer sliding member 208 of the writing instrument 200 of FIG. 17, and FIG. 23 is a longitudinal sectional view of the outer sliding member 208 of FIG. The outer sliding member 208 is a cylindrical member as a whole, and the outer diameter of the outer sliding member 208 is smaller than the inner diameter of the rear shaft 205 . A thick portion 208a as a holding portion is formed on the inner surface of the rear end portion of the outer sliding member 208. As shown in FIG. The front portion of the thick portion 208a, that is, the inner surface of the front end portion, has an annular tapered surface 208c, which is a slant surface that is continuously connected to the front end of the thick portion 208a and whose inner diameter decreases from the front end to the rear. It is The tapered surface 208c is a release portion. The inner diameter of the thick portion 208 a of the outer sliding member 208 is larger than the outer diameter of the inner cylinder main body 207 a of the inner cylinder 207 and smaller than the outer diameter of the small-diameter flange portion 207 c of the inner cylinder 207 . The outer sliding member 208 is preferably made of a metal material such as stainless steel, but may be made of a resin material or a resin material mixed with metal powder.

図24は、図17の筆記具200の内摺動部材209の斜視図であり、図25は、図24の内摺動部材209の縦断面図である。内摺動部材209は、全体として円筒状の部材である内摺動部材本体209aを有する。内摺動部材本体209aの後端部には、環状の突起である第1フランジ部209bが形成され、内摺動部材本体209aの後端と前端との間には、環状の突起である第2フランジ部209cが形成されている。内摺動部材209の内摺動部材本体209aの外径は、内筒207の小径部207hの内径よりも小さい。第1フランジ部209b及び第2フランジ部209cの外径は、内筒207の小径部207hの内径よりも大きい。第1フランジ部209bと第2フランジ部209cとの間の内摺動部材本体209aの外周面には、環状の凹部209dが形成されている。 24 is a perspective view of the inner sliding member 209 of the writing instrument 200 of FIG. 17, and FIG. 25 is a longitudinal sectional view of the inner sliding member 209 of FIG. The inner sliding member 209 has an inner sliding member main body 209a which is a cylindrical member as a whole. A first flange portion 209b, which is an annular projection, is formed at the rear end portion of the inner sliding member main body 209a, and a first flange portion 209b, which is an annular projection, is formed between the rear end and the front end of the inner sliding member main body 209a. A second flange portion 209c is formed. The outer diameter of the inner sliding member main body 209a of the inner sliding member 209 is smaller than the inner diameter of the small diameter portion 207h of the inner cylinder 207. As shown in FIG. The outer diameters of the first flange portion 209 b and the second flange portion 209 c are larger than the inner diameter of the small diameter portion 207 h of the inner cylinder 207 . An annular recess 209d is formed on the outer peripheral surface of the inner sliding member main body 209a between the first flange portion 209b and the second flange portion 209c.

内摺動部材本体209aの前端部には、軸線方向に延びる複数のリブ209eが形成されている。リフィル206の後端内に、内摺動部材本体209aの前端が挿入されると、複数のリブ209eによって圧入嵌合がなされる。この状態で、リフィル206の後端面は、第2フランジ部209cの前端面に当接するが、第2フランジ部209cに通気孔209fが形成されていることによって、リフィル206内と軸筒202内とが連通する。内摺動部材209は、例えば比重のあるステンレス鋼等の金属材料から形成されることが好ましいが、樹脂材料や、金属粉を混合させた樹脂材料、エラストマー等のゴム弾性材料から形成しても良い。 A plurality of ribs 209e extending in the axial direction are formed at the front end of the inner sliding member main body 209a. When the front end of the inner sliding member main body 209a is inserted into the rear end of the refill 206, a plurality of ribs 209e are press-fitted. In this state, the rear end surface of the refill 206 abuts against the front end surface of the second flange portion 209c. communicates. The inner sliding member 209 is preferably made of a metal material such as stainless steel having a specific gravity, but it may be made of a resin material, a resin material mixed with metal powder, or a rubber elastic material such as an elastomer. good.

図18又は図19を参照すると、内摺動部材209の内摺動部材本体209aの外側に対して、内筒207、コイルスプリング213、外摺動部材208の順に、取り付けられる。また、内摺動部材209の後端部に対して、重量体215が取り付けられる。この状態で、出没機構を、後軸205内に前方から挿入すると、内筒207の大径フランジ部207bと後軸205の内面とが圧入によって固定される。ボール10は、内筒7の貫通孔207d内に収容された状態で、外摺動部材208と内摺動部材209との間に常に配置されている。 18 or 19, the inner cylinder 207, the coil spring 213, and the outer sliding member 208 are attached to the outside of the inner sliding member main body 209a of the inner sliding member 209 in this order. A weight body 215 is attached to the rear end portion of the inner sliding member 209 . In this state, when the retractable mechanism is inserted into the rear shaft 205 from the front, the large-diameter flange portion 207b of the inner cylinder 207 and the inner surface of the rear shaft 205 are fixed by press-fitting. The ball 10 is always arranged between the outer sliding member 208 and the inner sliding member 209 while being housed in the through hole 207 d of the inner cylinder 7 .

従って、後軸205の内周面との内筒207の外周面との間に、ボール10及び外摺動部材208が摺動可能に配置され、内筒207内に、内摺動部材209が摺動可能に配置される。内摺動部材209の摺動は、コイルスプリング213の弾発力によって前方への摺動が規制され、重量体215を介して後軸205の後壁部205aによって後方への摺動が規制される。コイルスプリング213の前端は、内筒207の後端面によって支持され、コイルスプリング213の後端は、第1フランジ部209bの前端面によって支持される。外摺動部材208の摺動は、内筒207の小径フランジ部207cの後端面によって前方への摺動が規制され、後軸205の段部205cによって後方への摺動が規制される。 Therefore, the balls 10 and the outer sliding member 208 are slidably arranged between the inner peripheral surface of the rear axle 205 and the outer peripheral surface of the inner cylinder 207, and the inner sliding member 209 is arranged inside the inner cylinder 207. slidably arranged. The forward sliding of the inner sliding member 209 is restricted by the elastic force of the coil spring 213, and the rearward sliding is restricted by the rear wall portion 205a of the rear shaft 205 via the weight body 215. be. The front end of the coil spring 213 is supported by the rear end surface of the inner cylinder 207, and the rear end of the coil spring 213 is supported by the front end surface of the first flange portion 209b. The forward sliding of the outer sliding member 208 is restricted by the rear end surface of the small-diameter flange portion 207 c of the inner cylinder 207 , and the backward sliding is restricted by the stepped portion 205 c of the rear shaft 205 .

筆記状態の筆記具200において、外摺動部材208及び内摺動部材209は、ボール10と共に係止している。出没機構が後方向の慣性力を受けると、外摺動部材208は後方へ向かって摺動し、その後端面が、後軸5の段部5cに衝突する。外摺動部材208の厚肉部208aによる内摺動部材209及びボール10との係止が解除される。すなわち、外摺動部材208のテーパ面208cとボール10とが径方向に整列して、ボール10が内摺動部材209の凹部209dから外れ、出没機構によるリフィル206の保持が解除される。 In the writing instrument 200 in the writing state, the outer sliding member 208 and the inner sliding member 209 are locked together with the ball 10 . When the retraction mechanism receives a rearward inertial force, the outer sliding member 208 slides rearward, and the rear end face collides with the stepped portion 5 c of the rear axle 5 . The engagement between the inner sliding member 209 and the balls 10 by the thick portion 208a of the outer sliding member 208 is released. That is, the tapered surface 208c of the outer sliding member 208 and the ball 10 are aligned in the radial direction, the ball 10 is released from the concave portion 209d of the inner sliding member 209, and the holding of the refill 206 by the retraction mechanism is released.

その結果、内摺動部材209の外径に配置されたコイルスプリング213の付勢力によって、リフィル206と圧入嵌合により一体となった内摺動部材209が後方へ向かって摺動する。従って、リフィル206の先端の筆記部206aは、先軸204の先端の孔204aから軸筒202内に没入し、筆記具200は非筆記状態となる。 As a result, the biasing force of the coil spring 213 arranged on the outer diameter of the inner sliding member 209 causes the inner sliding member 209 integrated with the refill 206 by press-fitting to slide rearward. Therefore, the writing portion 206a at the tip of the refill 206 is retracted into the barrel 202 through the hole 204a at the tip of the front barrel 204, and the writing instrument 200 is in a non-writing state.

本発明の第2実施形態による筆記具100及び第3実施形態による筆記具200によれば、上述した第1実施形態の筆記部1と同様の効果を奏する。また、特に、第2実施形態による筆記具100を振ることによって、第1筆記具101の筆記状態と非筆記状態とを切り替えると同時に、第2筆記具102消去状態と非消去状態と切り替えることができる。また、振り方を変化させたり、各部材の重量や重心等を調整したりすることによって、第1筆記具101及び第2筆記具102の出没機構を独立的に操作できるようにしても良い。 According to the writing instrument 100 according to the second embodiment and the writing instrument 200 according to the third embodiment of the present invention, the same effect as the writing unit 1 of the first embodiment described above can be obtained. In particular, by shaking the writing instrument 100 according to the second embodiment, the first writing instrument 101 can be switched between the writing state and the non-writing state, and at the same time, the second writing instrument 102 can be switched between the erasing state and the non-erasing state. Alternatively, the retraction mechanism of the first writing instrument 101 and the second writing instrument 102 may be operated independently by changing the way of swinging or adjusting the weight or center of gravity of each member.

1 筆記具
2 軸筒
3 消去部材
4 先軸
5 後軸
6 リフィル
6a 筆記部
7 内筒
8 外摺動部材
9 内摺動部材
10 ボール
11 解除部材
12 ガイド管
13 コイルスプリング
14 コイルスプリング
1 writing instrument 2 barrel 3 erasing member 4 front barrel 5 rear barrel 6 refill 6a writing part 7 inner cylinder 8 outer sliding member 9 inner sliding member 10 ball 11 release member 12 guide tube 13 coil spring 14 coil spring

Claims (1)

本願明細書に記載の発明。 The invention described herein.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55154185U (en) * 1979-04-20 1980-11-06
JPS6368488U (en) * 1986-07-14 1988-05-09
JPH0556491U (en) * 1991-12-27 1993-07-27 株式会社壽 Ballpoint pen
JPH1086595A (en) * 1996-09-18 1998-04-07 Machida:Kk Eraser-feeding mechanism
JP2000079795A (en) * 1998-09-03 2000-03-21 Machida:Kk Stick-like rubber eraser letting-out mechanism
JP2011093164A (en) * 2009-10-28 2011-05-12 Pilot Ink Co Ltd Thermochromism writing utensil
US20120014737A1 (en) * 2009-03-24 2012-01-19 Morris Corporation Writing implement with simultaneous retractable ends

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101500821B1 (en) 2010-12-29 2015-03-10 씨제이제일제당 (주) Method for Production of L-Methionine and Related Products

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Publication number Priority date Publication date Assignee Title
JPS55154185U (en) * 1979-04-20 1980-11-06
JPS6368488U (en) * 1986-07-14 1988-05-09
JPH0556491U (en) * 1991-12-27 1993-07-27 株式会社壽 Ballpoint pen
JPH1086595A (en) * 1996-09-18 1998-04-07 Machida:Kk Eraser-feeding mechanism
JP2000079795A (en) * 1998-09-03 2000-03-21 Machida:Kk Stick-like rubber eraser letting-out mechanism
US20120014737A1 (en) * 2009-03-24 2012-01-19 Morris Corporation Writing implement with simultaneous retractable ends
JP2011093164A (en) * 2009-10-28 2011-05-12 Pilot Ink Co Ltd Thermochromism writing utensil

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