JP5665259B2 - Soft member mounting structure - Google Patents

Soft member mounting structure Download PDF

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Publication number
JP5665259B2
JP5665259B2 JP2008063589A JP2008063589A JP5665259B2 JP 5665259 B2 JP5665259 B2 JP 5665259B2 JP 2008063589 A JP2008063589 A JP 2008063589A JP 2008063589 A JP2008063589 A JP 2008063589A JP 5665259 B2 JP5665259 B2 JP 5665259B2
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protrusion
soft member
peripheral surface
diameter portion
outer diameter
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JP2009214515A (en
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岩田　久嗣
久嗣 岩田
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Pilot Ink Co Ltd
Pilot Corp KK
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Pilot Ink Co Ltd
Pilot Corp KK
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Description

本発明は、軟質部材の取付構造に関する。詳細には、筆記具の軸筒またはキャップ等の筒体の上端部に軟質部材を取り付ける軟質部材の取付構造に関する。   The present invention relates to a flexible member mounting structure. Specifically, the present invention relates to a soft member mounting structure in which a soft member is attached to an upper end portion of a cylinder such as a shaft cylinder or a cap of a writing instrument.

従来の軟質部材の取付構造に関して、特許文献１には、頭部に凹部を有し、この凹部に消し具を圧入固定してなる筆記具の消し具付きキャップにおいて、前記凹部の底壁には凸部を、内側壁には長手方向に延在するリブを形成し、前記消し具に形成した孔部に前記底壁の凸部を圧入してなる筆記具の消し具付きキャップが開示されている。   Regarding a conventional soft member mounting structure, Patent Document 1 discloses a cap with a writing tool that has a concave portion in the head and press-fits the eraser into the concave portion. There is disclosed a cap with an eraser for a writing instrument in which a rib extending in the longitudinal direction is formed on the inner wall and a convex portion of the bottom wall is press-fitted into a hole formed in the eraser.

また、従来の軟質部材の取付構造に関して、特許文献２には、キャップの頂部や軸胴の後端部にシリコーンゴムからなる摩擦体を嵌合させる構造が開示されている。   Further, regarding a conventional soft member mounting structure, Patent Document 2 discloses a structure in which a friction body made of silicone rubber is fitted to a top portion of a cap or a rear end portion of a shaft barrel.

実用新案登録第２５７８２７３号公報Utility Model Registration No. 2578273 特開２００４−１４８７４４号公報JP 2004-148744 A

前記特許文献１の構造は、軟質部材（消し具）が、凹部底壁の凸部と凹部内側壁のリブにより挟持固定されるため、軟質部材を凹部に圧入する際に大きな押し込み力が必要であり、取付作業が困難となるおそれがある。   In the structure of Patent Document 1, the soft member (eraser) is sandwiched and fixed by the convex portion of the bottom wall of the concave portion and the rib of the inner wall of the concave portion, so that a large pressing force is required when the soft member is press-fitted into the concave portion. There is a risk that the mounting work may be difficult.

また、前記特許文献２の構造は、軟質部材（摩擦体）の一部を外部に露出させ、軟質部材の他の部分を嵌合部内面に圧入する構造であるため、強固な取り付けを得ようとすると、軟質部材全体の長手寸法が長くなるとともに軟質部材が圧入される筒体（キャップまたは軸筒など）の端部の長手寸法が長くなる。その結果、筒体の外観デザイン上の自由度が減少するおそれがある。   The structure of Patent Document 2 is a structure in which a part of the soft member (friction body) is exposed to the outside, and the other part of the soft member is press-fitted into the inner surface of the fitting portion. Then, while the longitudinal dimension of the whole soft member becomes long, the longitudinal dimension of the edge part of the cylinder (a cap, a shaft cylinder, etc.) in which a soft member is press-fit becomes long. As a result, there is a possibility that the degree of freedom in design of the outer appearance of the cylinder is reduced.

本発明は、前記従来の問題点を解決するものであって、軟質部材の取付作業が容易となり、また、筒体の外観デザイン上の自由度が増加する軟質部材の取付構造を提供しようとするものである。本発明で、筒体において、「上」とは突部側を指し、「下」とはその反対側を指す。また、本発明で、軟質部材において、「下」とは突部への挿入側を指し、「上」とはその反対側を指す。   The present invention solves the above-described conventional problems, and it is intended to provide a flexible member mounting structure that facilitates the mounting operation of the flexible member and increases the degree of freedom in the appearance design of the cylindrical body. Is. In the present invention, in the cylinder, “upper” refers to the protrusion side, and “lower” refers to the opposite side. In the present invention, in the soft member, “lower” refers to the insertion side to the protrusion, and “upper” refers to the opposite side.

本願の第１の発明は、筆記具の軸筒またはキャップの筒体の上端部に軟質部材を取り付ける軟質部材の取付構造であって、前記筒体の上端部に突部を設けるとともに、前記突部の上端部に膨出部を形成し、前記軟質部材は、熱変色性の筆跡の表面を擦って該筆跡を熱変色させる摩擦変色部材であり、前記軟質部材の軸心には、その軸方向に取付孔を貫設するとともに、前記取付孔の上部内周面を大内径部、下部内周面を前記大内径部より小さい内径の小内径部、前記大内径部及び前記小内径部の間の内周面を段形状の係止壁部とし、前記突部の外周面と前記取付孔の内周面とを嵌合させた際、前記突部の前記膨出部が前記取付孔の前記係止壁部に抜け止め係止されることを要件とする。1st invention of this application is the attachment structure of the soft member which attaches a soft member to the upper end part of the cylinder of a writing instrument, or the cylinder of a cap, Comprising: While providing a protrusion in the upper end part of the said cylinder, the said protrusion A bulging portion is formed at the upper end of the soft member, and the soft member is a frictional discoloration member that rubs the surface of the thermochromic handwriting to thermally discolor the handwriting. The upper inner peripheral surface of the mounting hole is a large inner diameter portion, and the lower inner peripheral surface is a small inner diameter portion smaller than the large inner diameter portion, between the large inner diameter portion and the small inner diameter portion. When the inner peripheral surface of the protrusion is a step-shaped locking wall portion and the outer peripheral surface of the protrusion and the inner peripheral surface of the mounting hole are fitted, the bulging portion of the protrusion is It is required that the retaining wall part is retained and retained.

本願の第２の発明は、上記第１の発明において、前記突部が、前記膨出部と、該膨出部より下方に延設され且つ該膨出部より小さい外径を有する小外径部と、該小外径部より下方に延設され且つ該小外径部より大きい外径を有する大外径部とからなることを要件とする。According to a second invention of the present application, in the first invention described above, the protrusion has a bulge portion and a small outer diameter that extends downward from the bulge portion and has an outer diameter smaller than the bulge portion. And a large outer diameter portion that extends downward from the small outer diameter portion and has a larger outer diameter than the small outer diameter portion.

本願の第３の発明は、上記第１又は第２の発明において、前記軟質部材の上端部の外周面に凸曲面が形成され、該外周面が前記筆跡との接触面となることを要件とする。According to a third invention of the present application, in the first or second invention, a convex curved surface is formed on the outer peripheral surface of the upper end portion of the soft member, and the outer peripheral surface is a contact surface with the handwriting. To do.

本願の第４の発明は、上記第１〜第３のいずれか１つの発明において、前記軟質部材は、弾性材料により一体に成形されることを要件とする。According to a fourth invention of the present application, in any one of the first to third inventions, the soft member is integrally formed of an elastic material.

本発明の軟質部材の取付構造によれば、突部を軟質部材の取付孔に嵌合させる際、軟質部材が径方向外方に自由に膨出変形可能であるため、大きな押し込み力が不要となり、取付作業が容易となる。   According to the soft member mounting structure of the present invention, when the protrusion is fitted into the soft member mounting hole, the soft member can be freely bulged and deformed radially outward, so that a large pushing force is not required. The mounting work becomes easy.

＜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。
本実施の形態の軟質部材の取付構造は、上端部に突部２を備えた筒体１と、該筒体１の突部２に取り付けられる軟質部材４とからなる。 <First Embodiment>
1 and 2 show a first embodiment of the present invention.
The attachment structure of the soft member according to the present embodiment includes a cylindrical body 1 having a protrusion 2 at the upper end and a soft member 4 attached to the protrusion 2 of the cylindrical body 1.

・筒体
前記筒体１は、合成樹脂（例えばポリプロピレン、ポリカーボネイト）の射出成形により得られる。前記筒体１は、例えば、筆記具の軸筒、または軸筒のペン先側に着脱自在のキャップが挙げられる。前記筒体１の上端部には、軸方向上方に突出する突部２が一体に形成される。また、前記筒体１の上端部には、前記突部２の外周を包囲する筒状の規制壁部３が一体に形成される。前記突部２及び規制壁部３は、筒体１がキャップの場合には、キャップの閉塞端側に形成され、筒体１が軸筒の場合には、ペン先と反対側の端部（即ち軸筒の尾端）に形成される。尚、前記突部２、前記規制壁部３は、筒体１と一体に形成される構成以外に、別部品の取り付けにより構成することもできる。また、筒体１（筆記具のキャップ、または筆記具の軸筒）は、合成樹脂以外にも、金属により構成することもできる。 -Tube body The tube body 1 is obtained by injection molding of a synthetic resin (for example, polypropylene, polycarbonate). As for the said cylinder 1, the cap which can be attached or detached to the pen tip side of a shaft cylinder of a writing instrument, or the shaft cylinder is mentioned, for example. A protruding portion 2 that protrudes upward in the axial direction is integrally formed at the upper end portion of the cylindrical body 1. In addition, a cylindrical regulation wall 3 that surrounds the outer periphery of the protrusion 2 is integrally formed at the upper end of the cylinder 1. The protrusion 2 and the restriction wall 3 are formed on the closed end side of the cap when the cylinder 1 is a cap, and the end opposite to the pen tip (when the cylinder 1 is a shaft cylinder) ( That is, it is formed at the tail end of the shaft tube. In addition, the said protrusion 2 and the said control wall part 3 can also be comprised by attachment of another components besides the structure formed integrally with the cylinder 1. FIG. Moreover, the cylinder 1 (a cap of a writing instrument or a shaft cylinder of a writing instrument) can be made of metal in addition to the synthetic resin.

・突部
前記突部２は、横断面円形状の軸方向に延びる棒状体であり、上端部に小外径部２１が形成され、該小外径部２１より大きい外径を有する大外径部２２が該小外径部２１より下方に形成される。 -Protrusion The protrusion 2 is a rod-like body extending in the axial direction having a circular cross section, and has a small outer diameter portion 21 formed at the upper end, and a large outer diameter having an outer diameter larger than the small outer diameter portion 21. The portion 22 is formed below the small outer diameter portion 21.

・規制壁部
前記規制壁部３は、軸方向に延びる円筒状であり、前記規制壁部３の内周面と、前記突部２の外周面との間には、環状の空間が形成される。 Restriction wall portion The restriction wall portion 3 has a cylindrical shape extending in the axial direction, and an annular space is formed between the inner peripheral surface of the restriction wall portion 3 and the outer peripheral surface of the protrusion 2. The

・軟質部材
軟質部材４は、横断面円形状を備える筒状体からなる。前記軟質部材４の外周面は、大径部４１と、該大径部４１の下方に一体に連設される小径部４２と、該大径部４１と小径部４２との間（即ち大径部４１の下端）に形成される段部４３とからなる。前記軟質部材４の軸心には、軸方向に取付孔５が貫設される。前記軟質部材４の大径部４１の上端部外周面には、凸曲面が形成される。 -Soft member The soft member 4 consists of a cylindrical body provided with a cross-sectional circular shape. The outer peripheral surface of the soft member 4 includes a large-diameter portion 41, a small-diameter portion 42 integrally provided below the large-diameter portion 41, and a space between the large-diameter portion 41 and the small-diameter portion 42 (that is, the large-diameter portion 42). And a step portion 43 formed at the lower end of the portion 41. A mounting hole 5 is formed in the axial center of the soft member 4 in the axial direction. A convex curved surface is formed on the outer peripheral surface of the upper end portion of the large diameter portion 41 of the soft member 4.

前記軟質部材４は、弾性材料により一体に形成される。前記弾性材料は、例えば、合成ゴムや熱可塑性エラストマー等が挙げられる。本実施の形態では、前記軟質部材４は、熱変色性の筆跡の表面を擦って該筆跡を熱変色させる摩擦変色部材が採用される。前記軟質部材４は、これ以外にも、消しゴム、または携帯情報端末に用いる入力ペンの入力部材等が挙げられる。   The soft member 4 is integrally formed of an elastic material. Examples of the elastic material include synthetic rubber and thermoplastic elastomer. In the present embodiment, the soft member 4 employs a frictional discoloration member that rubs the surface of the thermochromic handwriting to thermally discolor the handwriting. In addition to this, the soft member 4 may be an eraser or an input member of an input pen used for a portable information terminal.

・大径部
前記大径部４１の下端の段部４３が規制壁部３の上端に当接され、前記大径部４１が規制壁部３の上端より上方に突出される。前記大径部４１の最大外径は、規制壁部３の内径よりも大きく設定される。前記軟質部材４の大径部４１の上端部外周面が、紙面等の被接触面に接触可能な接触面となる。 -Large diameter part The step part 43 of the lower end of the said large diameter part 41 is contact | abutted to the upper end of the control wall part 3, and the said large diameter part 41 protrudes upwards from the upper end of the control wall part 3. FIG. The maximum outer diameter of the large diameter portion 41 is set larger than the inner diameter of the restriction wall portion 3. The outer peripheral surface of the upper end portion of the large-diameter portion 41 of the soft member 4 becomes a contact surface that can contact a contacted surface such as a paper surface.

・小径部
前記小径部４２の外径は、前記規制壁部３の内周面の内径より小さく設定される。 -Small diameter part The outer diameter of the said small diameter part 42 is set smaller than the internal diameter of the internal peripheral surface of the said control wall part 3. As shown in FIG.

・取付孔
前記取付孔５の内径は、突部２の小外径部２１の外径より僅かに大きく且つ突部２の大外径部２２の外径より僅かに小さく設定される。前記取付孔５の内径は、軸方向に亘って同一外径を有する。 Mounting hole The inner diameter of the mounting hole 5 is set to be slightly larger than the outer diameter of the small outer diameter portion 21 of the protrusion 2 and slightly smaller than the outer diameter of the large outer diameter portion 22 of the protrusion 2. The inner diameter of the mounting hole 5 has the same outer diameter in the axial direction.

・本実施の形態の作用
本実施の形態において、突部２が取付孔５に完全に嵌合する前において、図１に示すように、突部２を上向き状態にさせ、軟質部材４を筒体１の突部２の上方から落下させ、取付孔５の下端部に突部２の上端部（即ち小外径部２１）を遊挿させ、突部２が取付孔５に仮挿入状態となる。このとき、突部２の大外径部２２の上端と取付孔５の開口端（軟質部材４の下端）とが当接状態となる。 -Action of this embodiment In this embodiment, before the protrusion 2 is completely fitted in the mounting hole 5, as shown in FIG. It is dropped from above the protrusion 2 of the body 1, the upper end (that is, the small outer diameter portion 21) of the protrusion 2 is loosely inserted into the lower end of the attachment hole 5, and the protrusion 2 is temporarily inserted into the attachment hole 5. Become. At this time, the upper end of the large outer diameter portion 22 of the protrusion 2 and the open end of the mounting hole 5 (lower end of the soft member 4) are in contact with each other.

その後、図２に示すように、さらに、突部２を軟質部材４の取付孔５に圧入し、突部２の大外径部２２の外周面と取付孔５の内周面とを完全に嵌合させる。このとき、軟質部材４の大径部４１の下端の段部４３と、規制壁部３の上端とが当接される。また、このとき、大外径部２２の外周面と取付孔５の内周面との嵌合により、軟質部材４の小径部４２が径方向外方に膨出されるが、規制壁部３の内周面と膨出された小径部４２の外周面とは、非接触状態にある。   Thereafter, as shown in FIG. 2, the protrusion 2 is further press-fitted into the attachment hole 5 of the soft member 4, and the outer peripheral surface of the large outer diameter portion 22 of the protrusion 2 and the inner peripheral surface of the attachment hole 5 are completely formed. Fit. At this time, the stepped portion 43 at the lower end of the large-diameter portion 41 of the soft member 4 is brought into contact with the upper end of the regulating wall portion 3. At this time, the small diameter portion 42 of the soft member 4 bulges outward in the radial direction by fitting the outer peripheral surface of the large outer diameter portion 22 and the inner peripheral surface of the mounting hole 5. The inner peripheral surface and the outer peripheral surface of the bulged small diameter portion 42 are in a non-contact state.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、段部４３と規制壁部３の上端とが軸方向に当接することにより、取付孔５と突部２との軸方向の嵌合長さを、ばらつきなく一定に維持することができる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the stepped portion 43 and the upper end of the regulating wall portion 3 abut on each other in the axial direction. The fitting length in the axial direction between the protrusion 5 and the protrusion 2 can be kept constant without variation.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、小径部４２の外周面と規制壁部３の内周面とが非接触状態にあること（突部２の外周面と取付孔５の内周面との嵌合のみによって、筒体１の上端部に軟質部材４を取り付けること）により、軟質部材４が径方向外方に自由に膨出変形可能であるため、大きな押し込み力が不要となり、取り付け作業が容易となる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the outer peripheral surface of the small diameter portion 42 and the inner peripheral surface of the restriction wall portion 3 are in a non-contact state. By attaching the soft member 4 to the upper end portion of the cylindrical body 1 only by fitting the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5, the soft member 4 is free to move radially outward. Since it can be bulged and deformed, a large pushing force is not required, and attachment work is facilitated.

本実施の形態では、取付孔５の内径を突部２の小外径部２１の外径より僅かに大きく設定したことにより、図１に示すように、筒体１の突部２と軟質部材４の取付孔５とが完全に嵌合する前に、筒体１の突部２を上向き状態で、突部２の上端部と軟質部材４の取付孔５の下端部とを仮挿入状態にすることができる。その結果、軟質部材４を突部２の上方より下方に落下させるだけで、確実に仮挿入状態とすることができ、軟質部材４の適正な取付が確実に得られる。   In the present embodiment, the inner diameter of the mounting hole 5 is set to be slightly larger than the outer diameter of the small outer diameter portion 21 of the protrusion 2, so that the protrusion 2 and the soft member of the cylindrical body 1 as shown in FIG. Before the fitting hole 5 of 4 is completely fitted, the protrusion 2 of the cylindrical body 1 is in the upward state, and the upper end of the protrusion 2 and the lower end of the attachment hole 5 of the soft member 4 are temporarily inserted. can do. As a result, by simply dropping the soft member 4 downward from above the protrusion 2, the temporary insertion state can be ensured, and proper attachment of the soft member 4 can be reliably obtained.

本実施の形態では、取付孔５の内径を突部２の大外径部２２の外径より僅かに小さく設定したことにより、大外径部２２の外周面と取付孔５の下端部の内周面とを確実に嵌合させることができる。   In the present embodiment, the inner diameter of the mounting hole 5 is set slightly smaller than the outer diameter of the large outer diameter portion 22 of the protrusion 2, so that the inner diameter of the outer peripheral surface of the large outer diameter portion 22 and the lower end portion of the mounting hole 5 is reduced. A peripheral surface can be reliably fitted.

本実施の形態では、取付孔５が軸方向に貫通してなることにより、突部２を取付孔５に嵌合する際、取付孔５内部の空気を、圧縮させることなく確実に外部に逃がすことができ、突部２への軟質部材４の取付作業が容易となる。   In the present embodiment, the mounting hole 5 penetrates in the axial direction, so that when the protrusion 2 is fitted into the mounting hole 5, the air inside the mounting hole 5 is surely released to the outside without being compressed. This makes it easy to attach the soft member 4 to the protrusion 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。
本実施の形態の軟質部材の取付構造は、上端部に突部２を備えた筒体１と、該筒体１の突部２に取り付けられる軟質部材４とからなる。 <Second Embodiment>
3 and 4 show a second embodiment of the present invention.
The attachment structure of the soft member according to the present embodiment includes a cylindrical body 1 having a protrusion 2 at the upper end and a soft member 4 attached to the protrusion 2 of the cylindrical body 1.

・筒体
前記筒体１は、合成樹脂（例えばポリプロピレン、ポリカーボネイト）の射出成形により得られる。前記筒体１は、例えば、筆記具の軸筒、又は軸筒のペン先側に着脱自在のキャップが挙げられる。前記筒体１の上端部には、軸方向上方に突出する突部２が一体に形成される。前記突部２は、筒体１がキャップの場合には、キャップの閉塞端側に形成され、筒体１が軸筒の場合には、ペン先と反対側の端部（軸筒の尾端）に形成される。尚、前記突部２、前記規制壁部３は、筒体１と一体に形成される構成以外に、別部品の取り付けにより構成することもできる。また、筒体１（筆記具のキャップ、または筆記具の軸筒）は、合成樹脂以外にも、金属により構成することもできる。 -Tube body The tube body 1 is obtained by injection molding of a synthetic resin (for example, polypropylene, polycarbonate). As for the said cylinder 1, the cap which can be attached or detached to the pen tip side of a shaft cylinder of a writing instrument, or a shaft cylinder is mentioned, for example. A protruding portion 2 that protrudes upward in the axial direction is integrally formed at the upper end portion of the cylindrical body 1. When the cylindrical body 1 is a cap, the protrusion 2 is formed on the closed end side of the cap. When the cylindrical body 1 is a shaft cylinder, the projecting part 2 is located on the end opposite to the pen tip (the tail end of the shaft cylinder). ). In addition, the said protrusion 2 and the said control wall part 3 can also be comprised by attachment of another components besides the structure formed integrally with the cylinder 1. FIG. Moreover, the cylinder 1 (a cap of a writing instrument or a shaft cylinder of a writing instrument) can be made of metal in addition to the synthetic resin.

・突部
前記突部２は、横断面円形状の軸方向に延びる棒状体であり、上端部に小外径部２１が形成され、該小外径部２１より大きい外径を有する大外径部２２が該小外径部２１より下方に形成される。 -Protrusion The protrusion 2 is a rod-like body extending in the axial direction having a circular cross section, and has a small outer diameter portion 21 formed at the upper end, and a large outer diameter having an outer diameter larger than the small outer diameter portion 21. The portion 22 is formed below the small outer diameter portion 21.

・軟質部材
軟質部材４は、横断面円形状を備える筒状体からなる。前記軟質部材４の軸心には、軸方向に取付孔５が貫設される。前記軟質部材４の上端部の外周面には、凸曲面が形成される。前記軟質部材４の上端部の外周面が、紙面等の被接触面に接触可能な接触面となる。 -Soft member The soft member 4 consists of a cylindrical body provided with a cross-sectional circular shape. A mounting hole 5 is formed in the axial center of the soft member 4 in the axial direction. A convex curved surface is formed on the outer peripheral surface of the upper end portion of the soft member 4. The outer peripheral surface of the upper end portion of the soft member 4 becomes a contact surface that can contact a contacted surface such as a paper surface.

前記軟質部材４は、弾性材料により一体に形成される。前記弾性材料は、例えば、合成ゴムや熱可塑性エラストマー等が挙げられる。本実施の形態では、前記軟質部材４は、熱変色性の筆跡の表面を擦って該筆跡を熱変色させる摩擦変色部材が採用される。前記軟質部材４は、これ以外にも、消しゴム、または携帯情報端末に用いる入力ペンの入力部材等が挙げられる。   The soft member 4 is integrally formed of an elastic material. Examples of the elastic material include synthetic rubber and thermoplastic elastomer. In the present embodiment, the soft member 4 employs a frictional discoloration member that rubs the surface of the thermochromic handwriting to thermally discolor the handwriting. In addition to this, the soft member 4 may be an eraser or an input member of an input pen used for a portable information terminal.

・取付孔
前記取付孔５の内径は、突部２の小外径部２１の外径より僅かに大きく且つ突部２の大外径部２２の外径より僅かに小さく設定される。前記取付孔５の内径は、軸方向に亘って同一外径を有する。 Mounting hole The inner diameter of the mounting hole 5 is set to be slightly larger than the outer diameter of the small outer diameter portion 21 of the protrusion 2 and slightly smaller than the outer diameter of the large outer diameter portion 22 of the protrusion 2. The inner diameter of the mounting hole 5 has the same outer diameter in the axial direction.

・本実施の形態の作用
本実施の形態において、突部２が取付孔５に完全に嵌合する前において、図３に示すように、突部２を上向き状態にさせ、軟質部材４を筒体１の突部２の上方から落下させ、取付孔５の下端部に突部２の上端部（即ち小外径部２１）を遊挿させ、突部２が取付孔５に仮挿入状態となる。このとき、突部２の大外径部２２の上端と取付孔５の開口端（軟質部材４の下端）とが当接状態となる。 -Action of this embodiment In this embodiment, before the protrusion 2 is completely fitted in the mounting hole 5, as shown in FIG. It is dropped from above the protrusion 2 of the body 1, the upper end (that is, the small outer diameter portion 21) of the protrusion 2 is loosely inserted into the lower end of the attachment hole 5, and the protrusion 2 is temporarily inserted into the attachment hole 5. Become. At this time, the upper end of the large outer diameter portion 22 of the protrusion 2 and the open end of the mounting hole 5 (lower end of the soft member 4) are in contact with each other.

その後、図４に示すように、さらに、突部２を軟質部材４の取付孔５に圧入し、突部２の大外径部２２の外周面と取付孔５の内周面とを完全に嵌合させる。このとき、軟質部材４の下端と筒体１の上端（即ち突部２の基端）とが当接されるとともに、大外径部２２の外周面と取付孔５の内周面との嵌合により、軟質部材４が径方向外方に膨出される。   Thereafter, as shown in FIG. 4, the protrusion 2 is further press-fitted into the attachment hole 5 of the soft member 4, and the outer peripheral surface of the large outer diameter portion 22 of the protrusion 2 and the inner peripheral surface of the attachment hole 5 are completely connected. Fit. At this time, the lower end of the soft member 4 and the upper end of the cylindrical body 1 (that is, the base end of the protrusion 2) are brought into contact with each other, and the outer peripheral surface of the large outer diameter portion 22 and the inner peripheral surface of the mounting hole 5 are fitted. As a result, the soft member 4 bulges outward in the radial direction.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、軟質部材４の外周面全体が外部に露出し、突部２の外周面と取付孔５の内周面との嵌合のみによって、筒体１の上端部に軟質部材４を取り付けることにより、軟質部材４が径方向外方に自由に膨出変形可能であるため、大きな押し込み力が不要となり、取り付け作業が容易となる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the entire outer peripheral surface of the soft member 4 is exposed to the outside, and the outer peripheral surface of the protrusion 2 and the mounting hole By attaching the soft member 4 to the upper end portion of the cylindrical body 1 only by fitting with the inner peripheral surface of 5, the soft member 4 can freely bulge and deform outward in the radial direction. It becomes unnecessary and installation work becomes easy.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、軟質部材４の下端と筒体１の上端とが当接することにより、取付孔５と突部２との軸方向の嵌合長さを、ばらつきなく一定に維持することができる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the lower end of the soft member 4 and the upper end of the cylindrical body 1 come into contact with each other. The fitting length in the axial direction with the protrusion 2 can be kept constant without variation.

本実施の形態では、取付孔５の内径を突部２の小外径部２１の外径より僅かに大きく設定したことにより、図３に示すように、筒体１の突部２と軟質部材４の取付孔５とが完全に嵌合する前に、筒体１の突部２を上向き状態で、突部２の上端部と軟質部材４の取付孔５の下端部とを仮挿入状態にすることができる。その結果、軟質部材４を突部２の上方より下方に落下させるだけで、確実に仮挿入状態とすることができ、軟質部材４の適正な取付が確実に得られる。   In the present embodiment, the inner diameter of the mounting hole 5 is set to be slightly larger than the outer diameter of the small outer diameter portion 21 of the protrusion 2, so that the protrusion 2 and the soft member of the cylindrical body 1 as shown in FIG. Before the fitting hole 5 of 4 is completely fitted, the protrusion 2 of the cylindrical body 1 is in the upward state, and the upper end of the protrusion 2 and the lower end of the attachment hole 5 of the soft member 4 are temporarily inserted. can do. As a result, by simply dropping the soft member 4 downward from above the protrusion 2, the temporary insertion state can be ensured, and proper attachment of the soft member 4 can be reliably obtained.

本実施の形態では、取付孔５の内径を突部２の大外径部２２の外径より僅かに小さく設定したことにより、大外径部２２の外周面と取付孔５の下端部の内周面とを確実に嵌合させることができる。   In the present embodiment, the inner diameter of the mounting hole 5 is set slightly smaller than the outer diameter of the large outer diameter portion 22 of the protrusion 2, so that the inner diameter of the outer peripheral surface of the large outer diameter portion 22 and the lower end portion of the mounting hole 5 is reduced. A peripheral surface can be reliably fitted.

本実施の形態では、取付孔５が軸方向に貫通してなることにより、突部２を取付孔５に嵌合する際、取付孔５内部の空気を、圧縮させることなく確実に外部に逃がすことができ、突部２への軟質部材４の取付作業が容易となる。   In the present embodiment, the mounting hole 5 penetrates in the axial direction, so that when the protrusion 2 is fitted into the mounting hole 5, the air inside the mounting hole 5 is surely released to the outside without being compressed. This makes it easy to attach the soft member 4 to the protrusion 2.

＜第３の実施の形態＞
図５及び図６に本発明の第３の実施の形態を示す。
本実施の形態の軟質部材４の取付構造は、上端部に突部２を備えた筒体１と、該筒体１の突部２に取り付けられる軟質部材４とからなる。 <Third Embodiment>
5 and 6 show a third embodiment of the present invention.
The attachment structure of the soft member 4 according to the present embodiment includes a cylindrical body 1 provided with a protrusion 2 at the upper end and a soft member 4 attached to the protrusion 2 of the cylindrical body 1.

・筒体
前記筒体１は、合成樹脂（例えばポリプロピレン、ポリカーボネイト）の射出成形により得られる。前記筒体１は、例えば、筆記具の軸筒、又は軸筒のペン先側に着脱自在のキャップが挙げられる。前記筒体１の上端部には、軸方向上方に突出する突部２が一体に形成される。前記突部２は、筒体１がキャップの場合には、キャップの閉塞端側に形成され、筒体１が軸筒の場合には、ペン先と反対側の端部（軸筒の尾端）に形成される。尚、前記突部２、前記規制壁部３は、筒体１と一体に形成される構成以外に、別部品の取り付けにより構成することもできる。また、筒体１（筆記具のキャップ、または筆記具の軸筒）は、合成樹脂以外にも、金属により構成することもできる。 -Tube body The tube body 1 is obtained by injection molding of a synthetic resin (for example, polypropylene, polycarbonate). As for the said cylinder 1, the cap which can be attached or detached to the pen tip side of a shaft cylinder of a writing instrument, or a shaft cylinder is mentioned, for example. A protruding portion 2 that protrudes upward in the axial direction is integrally formed at the upper end portion of the cylindrical body 1. When the cylindrical body 1 is a cap, the protrusion 2 is formed on the closed end side of the cap. When the cylindrical body 1 is a shaft cylinder, the projecting part 2 is located on the end opposite to the pen tip (the tail end of the shaft cylinder). ). In addition, the said protrusion 2 and the said control wall part 3 can also be comprised by attachment of another components besides the structure formed integrally with the cylinder 1. FIG. Moreover, the cylinder 1 (a cap of a writing instrument or a shaft cylinder of a writing instrument) can be made of metal in addition to the synthetic resin.

・突部
前記突部２は、横断面円形状の軸方向に延びる棒状体であり、上端部に形成された膨出部２３と、該膨出部２３より下方に延設され且つ該膨出部２３より小さい外径を有する小外径部２１と、該小外径部２１より下方に延設され且つ該小外径部２１より大きい外径を有する大外径部２２とからなる。 Projection The projection 2 is a rod-shaped body extending in the axial direction with a circular cross section, a bulging portion 23 formed at the upper end, and extending below the bulging portion 23 and the bulging A small outer diameter portion 21 having an outer diameter smaller than the portion 23, and a large outer diameter portion 22 extending below the small outer diameter portion 21 and having an outer diameter larger than the small outer diameter portion 21.

・軟質部材
軟質部材４は、横断面円形状の筒状体からなる。前記軟質部材４の軸心には、軸方向に取付孔５が貫設される。前記取付孔５の上部内周面には、大内径部５１が形成され、前記取付孔５の下部内周面には、該大内径部５１より小さい内径を有する小内径部５２が形成される。前記取付孔５の大内径部５１と小内径部５２との間の内周面には、段形状の係止壁部５３が形成される。前記軟質部材４の上端部の外周面には、凸曲面が形成される。前記軟質部材４の上端部の外周面が、紙面等の被接触面に接触可能な接触面となる。 -Soft member The soft member 4 consists of a cylindrical body with a circular cross section. A mounting hole 5 is formed in the axial center of the soft member 4 in the axial direction. A large inner diameter portion 51 is formed on the upper inner peripheral surface of the mounting hole 5, and a small inner diameter portion 52 having an inner diameter smaller than that of the large inner diameter portion 51 is formed on the lower inner peripheral surface of the mounting hole 5. . On the inner circumferential surface between the large inner diameter portion 51 and the small inner diameter portion 52 of the mounting hole 5, a step-shaped locking wall portion 53 is formed. A convex curved surface is formed on the outer peripheral surface of the upper end portion of the soft member 4. The outer peripheral surface of the upper end portion of the soft member 4 becomes a contact surface that can contact a contacted surface such as a paper surface.

前記軟質部材４は、弾性材料により一体に形成される。前記弾性材料は、例えば、合成ゴムや熱可塑性エラストマー等が挙げられる。本実施の形態では、前記軟質部材４は、熱変色性の筆跡の表面を擦って該筆跡を熱変色させる摩擦変色部材が採用される。前記軟質部材４は、これ以外にも、消しゴム、または携帯情報端末に用いる入力ペンの入力部材等が挙げられる。   The soft member 4 is integrally formed of an elastic material. Examples of the elastic material include synthetic rubber and thermoplastic elastomer. In the present embodiment, the soft member 4 employs a frictional discoloration member that rubs the surface of the thermochromic handwriting to thermally discolor the handwriting. In addition to this, the soft member 4 may be an eraser or an input member of an input pen used for a portable information terminal.

・取付孔
前記取付孔５の大内径部５１の内径は、膨出部２３の外径より大きく設定される。前記取付孔５の小内径部５２の内径は、膨出部２３の外径及び大外径部２２の外径より小さく設定される。 Mounting hole The inner diameter of the large inner diameter portion 51 of the mounting hole 5 is set larger than the outer diameter of the bulging portion 23. The inner diameter of the small inner diameter portion 52 of the mounting hole 5 is set smaller than the outer diameter of the bulging portion 23 and the outer diameter of the large outer diameter portion 22.

・本実施の形態の作用
図６に示すように、突部２を軟質部材４の取付孔５に圧入し、突部２の大外径部２２の外周面と取付孔５の小内径部５２の内周面とが完全に嵌合される。このとき、膨出部２３が係止壁部５３と上下方向に係止（抜け止め係止）される。また、このとき、軟質部材４の下端と筒体１の上端（即ち突部２の基端）とが当接されるとともに、大外径部２２の外周面と取付孔５の内周面との嵌合により、軟質部材４が径方向外方に膨出される。 Operation of this Embodiment As shown in FIG. 6, the protrusion 2 is press-fitted into the attachment hole 5 of the soft member 4, and the outer peripheral surface of the large outer diameter portion 22 of the protrusion 2 and the small inner diameter portion 52 of the attachment hole 5. Are completely mated with the inner peripheral surface. At this time, the bulging portion 23 is locked in the up-down direction with the locking wall portion 53 (locking prevention). At this time, the lower end of the soft member 4 and the upper end of the cylindrical body 1 (that is, the base end of the protrusion 2) are brought into contact with each other, and the outer peripheral surface of the large outer diameter portion 22 and the inner peripheral surface of the mounting hole 5 As a result of the fitting, the soft member 4 bulges outward in the radial direction.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、軟質部材４の外周面全体が外部に露出し、突部２の外周面と取付孔５の内周面との嵌合のみによって、筒体１の上端部に軟質部材４を取り付けることにより、軟質部材４が径方向外方に自由に膨出変形可能であるため、大きな押し込み力が不要となり、取り付け作業が容易となる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the entire outer peripheral surface of the soft member 4 is exposed to the outside, and the outer peripheral surface of the protrusion 2 and the mounting hole By attaching the soft member 4 to the upper end portion of the cylindrical body 1 only by fitting with the inner peripheral surface of 5, the soft member 4 can freely bulge and deform outward in the radial direction. It becomes unnecessary and installation work becomes easy.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、軟質部材４の下端と筒体１の上端とが当接することにより、取付孔５と突部２との軸方向の嵌合長さを、ばらつきなく一定に維持することができる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the lower end of the soft member 4 and the upper end of the cylindrical body 1 come into contact with each other. The fitting length in the axial direction with the protrusion 2 can be kept constant without variation.

本実施の形態では、取付孔５の小内径部５２の内径を突部２の大外径部２２の外径より僅かに小さく設定したことにより、大外径部２２の外周面と取付孔５の下端部の内周面とを確実に嵌合させることができる。   In the present embodiment, the inner diameter of the small inner diameter portion 52 of the mounting hole 5 is set slightly smaller than the outer diameter of the large outer diameter portion 22 of the protrusion 2, so that the outer peripheral surface of the large outer diameter portion 22 and the mounting hole 5. It is possible to reliably fit the inner peripheral surface of the lower end of the.

本実施の形態では、取付孔５が軸方向に貫通してなることにより、突部２を取付孔５に嵌合する際、取付孔５内部の空気を、圧縮させることなく確実に外部に逃がすことができ、突部２への軟質部材４の取付作業が容易となる。   In the present embodiment, the mounting hole 5 penetrates in the axial direction, so that when the protrusion 2 is fitted into the mounting hole 5, the air inside the mounting hole 5 is surely released to the outside without being compressed. This makes it easy to attach the soft member 4 to the protrusion 2.

本実施の形態では、突部２の外周面と取付孔５の内周面とを嵌合させた際、膨出部２３が係止壁部５３に抜け止め係止されることにより、突部２に対する軟質部材４の確実な抜け止めがなされる。   In the present embodiment, when the outer peripheral surface of the protrusion 2 and the inner peripheral surface of the mounting hole 5 are fitted, the bulging portion 23 is retained and locked to the locking wall portion 53, so that the protrusion Thus, the soft member 4 can be reliably prevented from coming out of 2.

本発明の第１の実施の形態において、軟質部材の取付孔と筒体の突部とが嵌合する前の状態を示す要部縦断面図である。In the 1st Embodiment of this invention, it is a principal part longitudinal cross-sectional view which shows the state before the attachment hole of a soft member and the protrusion part of a cylindrical body fit. 第１の実施の形態において、軟質部材の取付孔と筒体の突部とが完全に嵌合した状態を示す要部縦断面図である。In 1st Embodiment, it is a principal part longitudinal cross-sectional view which shows the state which the attachment hole of the soft member and the protrusion part of the cylindrical body fitted completely. 本発明の第２の実施の形態において、軟質部材の取付孔と筒体の突部とが嵌合する前の状態を示す要部縦断面図である。In the 2nd Embodiment of this invention, it is a principal part longitudinal cross-sectional view which shows the state before the attachment hole of a soft member and the protrusion part of a cylindrical body fit. 第２の実施の形態において、軟質部材の取付孔と筒体の突部とが完全に嵌合した状態を示す要部縦断面図である。In 2nd Embodiment, it is a principal part longitudinal cross-sectional view which shows the state which the attachment hole of the soft member and the protrusion part of the cylindrical body fitted completely. 本発明の第３の実施の形態において、軟質部材の取付孔と筒体の突部とが嵌合する前の状態を示す要部縦断面図である。In the 3rd Embodiment of this invention, it is a principal part longitudinal cross-sectional view which shows the state before the attachment hole of a soft member and the protrusion of a cylinder are fitted. 第３の実施の形態において、軟質部材の取付孔と筒体の突部とが完全に嵌合した状態を示す要部縦断面図である。In 3rd Embodiment, it is a principal part longitudinal cross-sectional view which shows the state which the attachment hole of the soft member and the protrusion of the cylinder body were completely fitted.

１ 筒体
２ 突部
２１ 小外径部
２２ 大外径部
２３ 膨出部
３ 規制壁部
４ 軟質部材
４１ 大径部
４２ 小径部
４３ 段部
５ 取付孔
５１ 大内径部
５２ 小内径部
５３ 係止壁部 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Protrusion part 21 Small outer diameter part 22 Large outer diameter part 23 Expansion part 3 Restriction wall part 4 Soft member 41 Large diameter part 42 Small diameter part 43 Step part 5 Mounting hole 51 Large inner diameter part 52 Small inner diameter part 53 Engagement Stop wall

Claims (4)

筆記具の軸筒またはキャップの筒体の上端部に軟質部材を取り付ける軟質部材の取付構造であって、
前記筒体の上端部に突部を設けるとともに、前記突部の上端部に膨出部を形成し、
前記軟質部材は、熱変色性の筆跡の表面を擦って該筆跡を熱変色させる摩擦変色部材であり、前記軟質部材の軸心には、その軸方向に取付孔を貫設するとともに、前記取付孔の上部内周面を大内径部、下部内周面を前記大内径部より小さい内径の小内径部、前記大内径部及び前記小内径部の間の内周面を段形状の係止壁部とし、
前記突部の外周面と前記取付孔の内周面とを嵌合させた際、前記突部の前記膨出部が前記取付孔の前記係止壁部に抜け止め係止されることを特徴とする軟質部材の取付構造。 A soft member mounting structure for attaching a soft member to an upper end portion of a shaft tube of a writing instrument or a cylindrical body of a cap,
Providing a protrusion at the upper end of the cylindrical body, forming a bulge at the upper end of the protrusion,
The soft member is a friction discoloration member that rubs the surface of a thermochromic handwriting to thermally discolor the handwriting. The upper inner peripheral surface of the hole has a large inner diameter portion, the lower inner peripheral surface has a smaller inner diameter portion smaller than the larger inner diameter portion, and the inner peripheral surface between the larger inner diameter portion and the smaller inner diameter portion has a stepped locking wall And
When the outer peripheral surface of the protrusion and the inner peripheral surface of the mounting hole are fitted, the bulging portion of the protrusion is locked to the locking wall portion of the mounting hole. A flexible member mounting structure. 前記突部が、前記膨出部と、該膨出部より下方に延設され且つ該膨出部より小さい外径を有する小外径部と、該小外径部より下方に延設され且つ該小外径部より大きい外径を有する大外径部とからなる請求項１に記載の軟質部材の取付構造。 The protrusion is extended from the bulging portion, a small outer diameter portion that extends downward from the bulging portion and has an outer diameter smaller than the bulging portion, and extends downward from the small outer diameter portion; The flexible member mounting structure according to claim 1 , further comprising a large outer diameter portion having an outer diameter larger than the small outer diameter portion. 前記軟質部材の上端部の外周面に凸曲面が形成され、該外周面が前記筆跡との接触面となる請求項１又は２に記載の軟質部材の取付構造。 The soft member convex curved outer peripheral surface of the upper end portion is formed of a mounting structure of the soft member according to claim 1 or 2 outer circumferential surface is a contact surface with the handwriting. 前記軟質部材は、弾性材料により一体に成形される請求項１乃至３の何れかに記載の軟質部材の取付構造。 The soft member mounting structure according to any one of claims 1 to 3 , wherein the soft member is integrally formed of an elastic material.
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JP5663537B2 (en) * 2012-08-21 2015-02-04 パイロットインキ株式会社 Soft member mounting structure, writing instrument and soft member
JP2015051566A (en) * 2013-09-06 2015-03-19 三菱鉛筆株式会社 Thermochromic writing tool
JP5719459B2 (en) * 2014-02-27 2015-05-20 パイロットインキ株式会社 Friction body mounting structure
JP6419531B2 (en) * 2014-10-31 2018-11-07 株式会社パイロットコーポレーション Thermochromic writing instrument
JP6506540B2 (en) * 2014-11-26 2019-04-24 三菱鉛筆株式会社 Writing instrument comprising an erasing member
JP6240691B2 (en) * 2016-02-15 2017-11-29 パイロットインキ株式会社 Soft member mounting structure
EP4082807A4 (en) * 2019-12-28 2024-01-24 Kabushiki Kaisha Pilot Corporation (also trading as Pilot Corporation) Soft member attachment structure and thermochromic writing implement
JP7372855B2 (en) * 2020-02-28 2023-11-01 株式会社パイロットコーポレーション Soft member mounting structure
JP7405645B2 (en) * 2020-02-28 2023-12-26 株式会社パイロットコーポレーション Soft member mounting structure

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