JP7760334B2 - Friction implements and thermochromic writing implements - Google Patents
Friction implements and thermochromic writing implementsInfo
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- JP7760334B2 JP7760334B2 JP2021176456A JP2021176456A JP7760334B2 JP 7760334 B2 JP7760334 B2 JP 7760334B2 JP 2021176456 A JP2021176456 A JP 2021176456A JP 2021176456 A JP2021176456 A JP 2021176456A JP 7760334 B2 JP7760334 B2 JP 7760334B2
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Description
本発明は、摩擦具及び熱変色性筆記具に関する。詳細には、熱変色性インキを用いて被筆記面上に形成した熱変色性の像または筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性の像または筆跡を熱変色可能な摩擦具及び熱変色性筆記具に関する。 The present invention relates to a friction tool and a thermochromic writing instrument. More specifically, it relates to a friction tool and a thermochromic writing instrument that can cause a thermochromic image or handwriting formed on a surface using thermochromic ink to change color by rubbing the thermochromic image or handwriting with the frictional heat generated during the friction.
特許文献１には、筒状の嵌合部の外周に消去部が二色成形により一体に形成され、嵌合部の内壁に内ねじが形成された消し具を備え、筆記具の後端部の突出部の外壁に外ねじが形成され、嵌合部の内ねじ及び突出部の外ねじを介して消し具が筆記具に取り付けられる構成が記載されている。 Patent Document 1 describes a configuration in which an erasing section is integrally formed on the outer periphery of a cylindrical fitting section by two-tone molding, an eraser is provided with an internal thread formed on the inner wall of the fitting section, and an external thread is formed on the outer wall of a protruding section at the rear end of the writing instrument, and the eraser is attached to the writing instrument via the internal thread of the fitting section and the external thread of the protruding section.
前記従来の消し具は、使用により、消し具の内ねじと突出部の外ねじとの螺合が緩んで、消し具がぐらついたり、消し具が筆記具から脱落したりするおそれがある。 With the conventional erasers described above, the engagement between the internal threads of the eraser and the external threads of the protrusion can loosen during use, causing the eraser to wobble or fall off the writing instrument.
本願発明は、前記従来の問題点を解決するものであって、摩擦体と本体との螺合が緩むことを防止し、摩擦体がぐらついたり、摩擦体が本体から脱落したりすることを回避できる摩擦具及び熱変色性筆記具を提供しようとするものである。本発明で、「上」とは摩擦部側（図面で上方）を指し、「下」とはその反対側を指す。 The present invention aims to solve the above-mentioned problems of the prior art by providing a friction tool and a thermochromic writing instrument that can prevent the threaded connection between the friction body and the main body from loosening, and prevent the friction body from wobbling or falling off the main body. In this invention, "top" refers to the friction part side (upper side in the drawing), and "bottom" refers to the opposite side.
本願の第１の発明は、熱変色性インキを用いて被筆記面上に形成した熱変色性の像または筆跡を摩擦し、その際に生じる摩擦熱で前記熱変色性の像または筆跡を熱変色可能な摩擦具であって、本体と、前記本体の上部に着脱自在に取り付けられる摩擦体と、を備え、前記本体は、基部と、前記基部の上部に設けられた当接部と、前記当接部から軸方向上方に突出する取付部と、前記取付部の外面に形成された雄ねじ部と、を備え、前記摩擦体は、筒状の保持部と、前記保持部の内面に形成された雌ねじ部と、前記保持部の外部に固着された摩擦部と、前記摩擦部の下部に設けられ前記保持部の下端部より下方に位置する圧接部と、を備え、前記摩擦体が前記取付部に取り付けられた状態において、前記雄ねじ部と前記雌ねじ部とが螺合されるとともに、前記当接部と前記圧接部とが圧接されてなることを要件とする。 The first invention of the present application is a friction device that can thermally change the color of a thermochromic image or handwriting formed on a surface using thermochromic ink by rubbing the thermochromic image or handwriting with the frictional heat generated during the friction. The friction device comprises a main body and a friction body that is detachably attached to the upper part of the main body. The main body comprises a base, a contact portion provided on the upper part of the base, a mounting portion that protrudes axially upward from the contact portion, and a male thread portion formed on the outer surface of the mounting portion. The friction body comprises a tubular holding portion, a female thread portion formed on the inner surface of the holding portion, a friction portion fixed to the outside of the holding portion, and a pressure-contact portion provided below the friction portion and positioned below the lower end of the holding portion. When the friction body is attached to the mounting portion, the male thread portion and the female thread portion are threadedly engaged, and the contact portion and the pressure-contact portion are pressure-contacted.
前記第１の発明の摩擦具は、前記構成により、摩擦体と本体との螺合が緩むことを防止し、摩擦体がぐらついたり、摩擦体が本体から脱落したりすることを回避できる。 The friction device of the first invention, thanks to its configuration, prevents the threaded engagement between the friction body and the main body from loosening, preventing the friction body from wobbling or falling off the main body.
また、前記摩擦部は、二色成形により前記保持部に固着されることが好ましい。 It is also preferable that the friction portion be fixed to the holding portion by two-color molding.
これにより、摩擦部と保持部とが強固に固着されるため、強く摩擦した場合でも摩擦部が保持部から脱絡することを防ぐことができる。 This firmly bonds the friction part and the holding part together, preventing the friction part from becoming detached from the holding part even in the event of strong friction.
また、熱変色性インキが内蔵され且つ該熱変色性インキが吐出可能なペン先を有する軸筒を備えた熱変色性筆記具であって、前記軸筒が前記摩擦具の本体であってもよい。 It may also be a thermochromic writing instrument equipped with a barrel that contains thermochromic ink and has a pen tip that can eject the thermochromic ink, and the barrel may be the main body of the friction device.
これにより、摩擦体と軸筒との螺合が緩むことを防止し、摩擦体がぐらついたり、摩擦体が軸筒から脱落したりすることを回避できる。 This prevents the threaded engagement between the friction body and the barrel from loosening, preventing the friction body from wobbling or falling off the barrel.
また、熱変色性インキが内蔵され且つ該熱変色性インキが吐出可能なペン先を有する軸筒と、該軸筒のペン先側に着脱自在に装着されるキャップと、を備えた熱変色性筆記具であって、前記キャップが前記摩擦具の本体であってもよい。 Also, a thermochromic writing instrument may include a barrel that contains thermochromic ink and has a pen tip that can eject the thermochromic ink, and a cap that is removably attached to the pen tip side of the barrel, wherein the cap is the main body of the friction device.
これにより、摩擦体とキャップとの螺合が緩むことを防止し、摩擦体がぐらついたり、摩擦体がキャップから脱落したりすることを回避できる。 This prevents the threaded connection between the friction body and the cap from loosening, preventing the friction body from wobbling or falling off the cap.
本発明の摩擦具は、摩擦体と本体との螺合が緩むことを防止し、摩擦体がぐらついたり、摩擦体が本体から脱落したりすることを回避できる。 The friction device of the present invention prevents the threaded connection between the friction body and the main body from loosening, preventing the friction body from wobbling or falling off the main body.
以下、図面を参照して本発明の２つの実施の形態について説明する。なお、本発明の実施形態の摩擦具1及び熱変色性筆記具１１において、「上」とは摩擦体側（図面で上方）を指し、「下」とはその反対側を指す。 Two embodiments of the present invention will be described below with reference to the drawings. Note that in the friction implement 1 and thermochromic writing implement 11 of the embodiments of the present invention, "upper" refers to the friction implement side (upper side in the drawings), and "lower" refers to the opposite side.
＜第１実施形態＞
図１乃至図４に、本発明の第１実施形態を示す。図１は、本発明の第１実施形態の取付部２３近傍を中心とした本体２の要部縦断面図である。なお、図１の本体２は、後述する第２実施形態の摩擦具にも用いられる。
First Embodiment
1 to 4 show a first embodiment of the present invention. Fig. 1 is a longitudinal cross-sectional view of a main body 2 of the first embodiment of the present invention, focusing on the vicinity of an attachment portion 23. The main body 2 of Fig. 1 is also used in a friction device of a second embodiment, which will be described later.
図２及び図３は、本発明の第１実施形態の摩擦体３の縦断面図及び斜視図である。図４は、図２及び図３に示す摩擦体３が図１に示す本体２に取り付けられた状態を示す要部縦断面図である。 Figures 2 and 3 are a longitudinal cross-sectional view and a perspective view of the friction body 3 of the first embodiment of the present invention. Figure 4 is a longitudinal cross-sectional view of the essential parts showing the friction body 3 shown in Figures 2 and 3 attached to the main body 2 shown in Figure 1.
本実施形態の摩擦具１及び熱変色性筆記具１１は、本体２と、本体２の上部に着脱自在に取り付けられる摩擦体３と、を備える構成である。該摩擦体３によって、熱変色性インキを用いて被筆記面上に形成した熱変色性の像または筆跡を摩擦し、その際に生じる摩擦熱で熱変色性の像または筆跡を熱変色可能である。 The friction implement 1 and thermochromic writing implement 11 of this embodiment are configured to include a main body 2 and a friction body 3 that is detachably attached to the top of the main body 2. The friction body 3 is used to rub a thermochromic image or handwriting formed on a surface to be written on using thermochromic ink, and the frictional heat generated during this process can thermocolorize the thermochromic image or handwriting.
・本体
本体２は、筒状体（例えば円筒体）または柱状体（例えば円柱体）である。本体２を構成する材料としては、例えば、合成樹脂（例：ポリカーボネイト（ＰＣ）樹脂、ポリプロピレン（ＰＰ）樹脂、ＡＢＳ樹脂、ポリブチレンテレフタレート（ＰＢＴ）樹脂、及びナイロン６，６のような合成樹脂）、金属、木材、紙等が挙げられる。
The main body 2 is a cylindrical body (e.g., a cylinder) or a columnar body (e.g., a cylindrical body). Examples of materials that can be used to form the main body 2 include synthetic resins (e.g., synthetic resins such as polycarbonate (PC) resin, polypropylene (PP) resin, ABS resin, polybutylene terephthalate (PBT) resin, and nylon 6,6), metal, wood, and paper.
図１に示すように、本実施形態においては、本体２は、円筒体の基部２１を備える。また、該基部２１の上部に摩擦体３の下部（圧接部４２）が当接（圧接）する当接部２２を備える。また、該当接部２２から軸方向上方に突出する取付部２３と、該取付部２３の外面に形成された雄ねじ部２４と、を備える。 As shown in FIG. 1, in this embodiment, the main body 2 has a cylindrical base 21. The upper part of the base 21 also has a contact part 22 with which the lower part (pressure contact part 42) of the friction body 3 abuts (presses). The main body 2 also has an attachment part 23 that protrudes axially upward from the contact part 22, and a male thread part 24 formed on the outer surface of the attachment part 23.
また、当接部２２の表面には、上方に突出する上方突起が設けられていてもよい。これにより、摩擦体と本体との螺合が緩むことをより防止し、摩擦体がぐらついたり、摩擦体が本体から脱落したりすることを回避できる。 Furthermore, an upward protrusion that protrudes upward may be provided on the surface of the abutment portion 22. This further prevents the threaded engagement between the friction body and the main body from loosening, and prevents the friction body from wobbling or falling off the main body.
なお、上方突起としては、球形状突起が好ましい。また、四角柱形状、径方向外方に延びる突条、ゲート部に形成される樹脂残り部（ゲート残り）などでもよい。特に、該ゲート残りを上方突起とする場合、摩擦体３と本体２との螺合が緩むことをより防止でき、かつ安定して摩擦体を取り付けることができることに加えて、ゲート跡をユーザーから見えない場所に配置することができ、製品の美観を向上させる。 The upward protrusion is preferably a spherical protrusion. It may also be a rectangular prism, a ridge extending radially outward, or a resin residue (gate residue) formed in the gate portion. In particular, when the gate residue is an upward protrusion, loosening of the screw connection between the friction body 3 and the main body 2 can be prevented, and the friction body can be attached stably. Furthermore, the gate residue can be positioned in a location that is not visible to the user, improving the aesthetics of the product.
上方突起は、少なくとも１つ設けられていればよいが、複数個設けられていることが好ましい。上方突起が複数個設けられていることにより、本体２に摩擦体３を安定して螺合させることができる。特に、上方突起が３つ設けられている場合、いずれの突起も確実に圧接部４２に圧接され、安定して摩擦体を取り付けることができるため、より好ましい。 It is sufficient to have at least one upward protrusion, but it is preferable to have multiple. By providing multiple upward protrusions, the friction body 3 can be stably screwed onto the main body 2. In particular, it is more preferable to have three upward protrusions, as all of the protrusions are reliably pressed against the pressure contact portion 42, allowing for stable attachment of the friction body.
・取付部
図１に示すように、本実施形態においては、取付部２３は、当接部２２から軸方向上方に突出する円筒体でる。すなわち、取付部２３の内部には通気孔２５が設けられる。これによって、摩擦体３を取り付ける際に空気の圧縮を防ぐことができる。なお、取付部２３は、通気孔２５を備えない円柱体であってもよい。
Mounting Portion As shown in Fig. 1, in this embodiment, the mounting portion 23 is a cylindrical body that protrudes axially upward from the abutting portion 22. That is, an air vent 25 is provided inside the mounting portion 23. This makes it possible to prevent air from being compressed when the friction body 3 is attached. Note that the mounting portion 23 may also be a cylindrical body that does not have the air vent 25.
また、本実施形態においては、取付部２３は基部２１と一体に形成される。これにより、摩擦体３を本体２に強固に取り付けることができ、熱変色性の像または筆跡を安定して摩擦することができる。また基部２１と取付部２３は別体（別部品の組み合わせ）で構成されていてもよい。また、取付部２３の外面には、雄ねじ部２４が取付部２３と一体に形成される。 In addition, in this embodiment, the mounting portion 23 is formed integrally with the base 21. This allows the friction body 3 to be firmly attached to the main body 2, allowing stable friction of thermochromic images or handwriting. The base 21 and mounting portion 23 may also be formed as separate bodies (combinations of separate parts). Furthermore, a male thread portion 24 is formed integrally with the mounting portion 23 on the outer surface of the mounting portion 23.
・摩擦体
図２に示すように、本実施形態における摩擦体３は、筒状の保持部５と、保持部５の内面に形成された雌ねじ部５１と、保持部５の外部に固着された摩擦部４と、摩擦部４の下部に設けられ保持部５の下端部より下方に位置する圧接部４２と、を備える。また、摩擦部４の上端部には、上端孔４１が軸方向に貫設される。
2, the friction body 3 in this embodiment includes a cylindrical holding portion 5, a female thread portion 51 formed on the inner surface of the holding portion 5, a friction portion 4 fixed to the outside of the holding portion 5, and a pressure-contact portion 42 provided below the friction portion 4 and positioned below the lower end of the holding portion 5. An upper end hole 41 is formed axially through the upper end of the friction portion 4.
・保持部
図２乃至図４に示すように、本実施形態においては、保持部５は軸方向に貫通された内孔５２を備えた円筒体よりなる。保持部５の内孔５２の内面に雌ねじ部５１が形成される。雌ねじ部５１は、取付部２３の雄ねじ部２４に螺合可能である。
2 to 4, in this embodiment, the holding portion 5 is a cylindrical body having an inner hole 52 passing through in the axial direction. A female thread 51 is formed on the inner surface of the inner hole 52 of the holding portion 5. The female thread 51 can be threaded onto the male thread 24 of the attachment portion 23.
本実施形態においては、保持部５の雌ねじ部５１の内径（すなわち雌ねじ部５１のネジ山の頂部の内径）は、内孔５２上部の内径及び上端孔４１の内径よりも大きい。言い換えれば、保持部５の内孔５２と雌ねじ部５１との間に段部５３が形成される。 In this embodiment, the inner diameter of the female thread portion 51 of the retaining portion 5 (i.e., the inner diameter of the top of the threads of the female thread portion 51) is larger than the inner diameter of the upper part of the inner hole 52 and the inner diameter of the upper end hole 41. In other words, a step 53 is formed between the inner hole 52 of the retaining portion 5 and the female thread portion 51.
これにより、図４に示すように、摩擦体３が取付部２３に取り付けられた状態において、取付部２３が段部５３の後方に納まり、上端孔４１から通気孔２５にかけて空気の流通路が略同一径となり、円滑に空気を流通させることができ、摩擦体３を取り付ける際に空気の圧縮を防いて、摩擦体３を容易に取り付けることができる。 As a result, as shown in Figure 4, when the friction body 3 is attached to the attachment portion 23, the attachment portion 23 fits behind the step portion 53, and the air flow passage from the upper end hole 41 to the air vent 25 has approximately the same diameter, allowing for smooth air flow. This prevents air compression when attaching the friction body 3 and makes it easy to attach the friction body 3.
図４に示すように、保持部５の内孔５２と雌ねじ部５１との間に段部５３が形成されることで、さらに、ユーザーが上端孔４１の上方（外方）から下方（摩擦具１又は熱変色性筆記具１１の内部）を見た時に、取付部２３の端面が見えないため、製品の美観を向上させる。 As shown in Figure 4, a step 53 is formed between the inner hole 52 of the holding portion 5 and the female thread portion 51. This also means that when a user looks downward (toward the inside of the friction device 1 or thermochromic writing instrument 11) from above (outside) the upper end hole 41, the end face of the attachment portion 23 is not visible, improving the aesthetic appearance of the product.
図４に示すように、保持部５の内孔５２と雌ねじ部５１との間に段部５３が形成されることで、さらに、摩擦体３の上面（段部５３の上方）まで摩擦部４が設けられており、摩擦体の表面積及び体積を多くとれるため、熱変色性の像または筆跡を摩擦しやすくなる。 As shown in Figure 4, a step 53 is formed between the inner hole 52 of the retaining portion 5 and the female thread portion 51, and the friction portion 4 is further provided on the upper surface of the friction body 3 (above the step 53). This increases the surface area and volume of the friction body, making it easier to rub thermochromic images or handwriting.
なお、保持部５の雌ねじ部５１の内径と、内孔５２上部の内径と、が略同一径である場合、内孔５２の内径は、上端孔４１の内径よりも大きくてもよい。言い換えれば、上端孔４１と保持部５の内孔５２（雌ねじ部５１）との間に段部５３が形成されてもよい。これにより、上述の効果と同様の効果を奏する。 Note that if the inner diameter of the female threaded portion 51 of the retaining portion 5 and the inner diameter of the upper portion of the inner hole 52 are approximately the same diameter, the inner diameter of the inner hole 52 may be larger than the inner diameter of the upper end hole 41. In other words, a step 53 may be formed between the upper end hole 41 and the inner hole 52 (female threaded portion 51) of the retaining portion 5. This will achieve the same effect as described above.
保持部５は、摩擦部４よりも硬質な材料により構成される。保持部５を構成する材料として、例えば、合成樹脂（例：ポリカーボネイト（ＰＣ）樹脂、ポリプロピレン（ＰＰ）樹脂、ＡＢＳ樹脂、ポリブチレンテレフタレート（ＰＢＴ）樹脂、及びナイロン６，６のような合成樹脂）、金属、紙等が挙げられる。保持部５と摩擦部４とは二色成形により一体に形成されることが好ましい。 The holding portion 5 is made of a material that is harder than the friction portion 4. Examples of materials that can be used to make the holding portion 5 include synthetic resins (e.g., synthetic resins such as polycarbonate (PC) resin, polypropylene (PP) resin, ABS resin, polybutylene terephthalate (PBT) resin, and nylon 6,6), metal, and paper. It is preferable that the holding portion 5 and the friction portion 4 are integrally formed by two-color molding.
・摩擦部
図２乃至図４に示すように、本実施形態においては、摩擦部４は、保持部５の外部（外周）に二色成形により一体に固着される。より詳細には、摩擦部４は、保持部５の外周面、上面及び下面を連続して覆うように、二色成形により保持部５に一体に固着される。すなわち、摩擦部４は円筒体よりなる。また、図２又は図３に示すように、保持部５の下端部は摩擦体３の下面側に露出していない。
Frictional Part As shown in Figures 2 to 4, in this embodiment, the frictional part 4 is integrally fixed to the exterior (outer periphery) of the holding part 5 by two-shot molding. More specifically, the frictional part 4 is integrally fixed to the holding part 5 by two-shot molding so as to continuously cover the outer periphery, upper surface, and lower surface of the holding part 5. In other words, the frictional part 4 is made of a cylindrical body. Also, as shown in Figures 2 and 3, the lower end of the holding part 5 is not exposed on the lower surface side of the friction body 3.
また、摩擦部４の上端部には、上端孔４１が軸方向に貫設される。図２に示すように、上端孔４１は保持部５の内孔５２に連通される。さらに、図４に示すように、摩擦体３が本体２の取付部２３に取り付けられた状態においては、上端孔４１及び内孔５２は、本体２の通気孔２５に連通される。 An upper end hole 41 is formed axially at the upper end of the friction portion 4. As shown in Figure 2, the upper end hole 41 is connected to the inner hole 52 of the holding portion 5. Furthermore, as shown in Figure 4, when the friction body 3 is attached to the attachment portion 23 of the main body 2, the upper end hole 41 and the inner hole 52 are connected to the air vent 25 of the main body 2.
これにより、摩擦体３を取り付ける際に空気の圧縮を防いて、円滑に組み立てを行うことができる。なお、上端孔４１及び内孔５２は略同一径であり、ともに横断面円形状を有する。また、摩擦体３を取り付ける際に空気の圧縮を防ぐ間隙などがある場合は、上端孔４１、内孔５２又は通気孔２５は設けなくてもよい。 This prevents air compression when attaching the friction body 3, allowing for smooth assembly. The upper end hole 41 and inner hole 52 have approximately the same diameter and both have a circular cross section. Furthermore, if there is a gap or other gap that prevents air compression when attaching the friction body 3, the upper end hole 41, inner hole 52, or air vent 25 do not need to be provided.
・圧接部
図２又は図３に示すように、摩擦部４は、該摩擦部４の下部に設けられ、保持部５の下端部より下方に位置する圧接部４２を備える。本実施形態において、圧接部４２は保持部５の下面を連続して覆っている。摩擦体３が本体２の取付部２３に取り付けられた状態において、当接部２２と圧接部４２とが圧接される。
2 or 3, the friction portion 4 includes a pressure contact portion 42 that is provided below the friction portion 4 and is located below the lower end of the holding portion 5. In this embodiment, the pressure contact portion 42 continuously covers the lower surface of the holding portion 5. When the friction body 3 is attached to the attachment portion 23 of the main body 2, the abutment portion 22 and the pressure contact portion 42 are in pressure contact with each other.
これにより、当接部２２と圧接部４２との間に摩擦力が働き、摩擦体３と本体２との螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３が本体２から脱落したりすることを回避できる。 This creates a frictional force between the abutment portion 22 and the pressure contact portion 42, preventing the threaded engagement between the friction body 3 and the main body 2 from loosening, and preventing the friction body 3 from wobbling or falling off the main body 2.
なお、摩擦部４（圧接部４２）は、ゴム弾性を有する材料から形成され、例えば、シリコーン樹脂、ＳＢＳ（スチレン－ブタジエン－スチレン共重合体）樹脂、ＳＥＢＳ（スチレン－エチレン－ブチレン－スチレン共重合体）樹脂、フッ素系樹脂、クロロプレン樹脂、ニトリル樹脂、ポリエステル系樹脂、及びエチレンプロピレンジエンゴム（ＥＰＤＭ）のような弾性を有する合成樹脂（エラストマー）を含む材料により作られる。摩擦部４の材料は、複数のエラストマーを含んでもよい。 The friction portion 4 (pressure-welded portion 42) is formed from a material with rubber elasticity, such as a material containing an elastic synthetic resin (elastomer) such as silicone resin, SBS (styrene-butadiene-styrene copolymer) resin, SEBS (styrene-ethylene-butylene-styrene copolymer) resin, fluorine-based resin, chloroprene resin, nitrile resin, polyester-based resin, or ethylene propylene diene rubber (EPDM). The material of the friction portion 4 may contain multiple elastomers.
また、摩擦部４の材料は、エラストマーと、比較的弾性が小さい合成樹脂との混合物であっても良い。摩擦部４の材料は、消しゴムのような高摩耗性の弾性材料に比べ、摩耗による摩耗カス（消しカス）の発生が少ない、低摩耗性の弾性材料が好ましい。本実施形態では、摩擦部４は、熱可塑性エラストマー（例えば、ポリエステル系エラストマー、スチレン系エラストマー）であり、射出成形（二色成形）により得られる。 The material of the friction portion 4 may also be a mixture of an elastomer and a synthetic resin with relatively low elasticity. The material of the friction portion 4 is preferably a low-wear elastic material that generates less wear debris (eraser dust) due to wear compared to highly wear-resistant elastic materials such as erasers. In this embodiment, the friction portion 4 is a thermoplastic elastomer (e.g., polyester-based elastomer, styrene-based elastomer) and is obtained by injection molding (two-color molding).
また、摩擦部４の上端縁部は、凸曲面が周状に形成される。該摩擦部４を用いて、熱変色性インキを用いて被筆記面上に形成した熱変色性の像または筆跡を摩擦し、その際に生じる摩擦熱で熱変色性の像または筆跡を熱変色可能である。 The upper edge of the friction portion 4 is formed with a circumferentially convex curved surface. This friction portion 4 is used to rub a thermochromic image or handwriting formed on the surface using thermochromic ink, and the frictional heat generated during this process can thermally change the color of the thermochromic image or handwriting.
・取付状態
図４に摩擦体３を本体２の取付部２３に取り付けた状態を示す。図４に示すように、摩擦体３の保持部５の雌ねじ部５１と、取付部２３の雄ねじ部２４と、が螺合される。螺合が完了した段階で、摩擦体３の圧接部４２と、本体２の当接部２２とが圧接状態となる。
Mounting State Fig. 4 shows the state in which the friction body 3 is mounted on the mounting portion 23 of the main body 2. As shown in Fig. 4, the female thread portion 51 of the holding portion 5 of the friction body 3 and the male thread portion 24 of the mounting portion 23 are screwed together. When the screwing is complete, the pressure-contact portion 42 of the friction body 3 and the abutting portion 22 of the main body 2 are in a pressure-contact state.
本体２は、内部が空洞の筒状体の場合、熱変色性筆記具１１に用いる軸筒、または熱変色性筆記具１１に用いるキャップを構成することができる。熱変色性筆記具１１に用いる軸筒は、内部に熱変色性インキが収容され且つ該熱変色性インキが吐出可能なペン先を備えた熱変色性筆記具１１における軸筒である。 When the main body 2 is a hollow cylindrical body, it can form the barrel used in the thermochromic writing instrument 11 or the cap used in the thermochromic writing instrument 11. The barrel used in the thermochromic writing instrument 11 is the barrel of the thermochromic writing instrument 11 that contains thermochromic ink and is equipped with a pen tip that can eject the thermochromic ink.
熱変色性筆記具１１に用いるキャップは、内部に熱変色性インキが収容され且つ該熱変色性インキが吐出可能なペン先を備えた熱変色性筆記具１１における軸筒のペン先側に装着されるキャップである。 The cap used with the thermochromic writing instrument 11 is a cap that is attached to the nib side of the barrel of the thermochromic writing instrument 11, which contains thermochromic ink and has a nib capable of ejecting the thermochromic ink.
なお、本発明で、熱変色性インキは、可逆熱変色性インキが好ましい。可逆熱変色性インキは、発色状態から加熱により消色する加熱消色型、発色状態又は消色状態を互変的に特定温度域で記憶保持する色彩記憶保持型、又は、消色状態から加熱により発色し、発色状態からの冷却により消色状態に復する加熱発色型等、種々のタイプを単独又は併用して構成することができる。 In the present invention, the thermochromic ink is preferably a reversible thermochromic ink. Reversible thermochromic inks can be of various types, either alone or in combination, including a thermal decolorization type that decolorizes from a colored state when heated, a color memory retention type that alternately retains the colored or decolorized state within a specific temperature range, or a thermal color development type that develops color from a decolorized state when heated and returns to the decolorized state when cooled from the colored state.
熱変色性インキを用いて被筆記面上に形成した熱変色性の像または筆跡を摩擦し、その際に生じる摩擦熱で熱変色性の像または筆跡を熱変色可能な摩擦具1であって、本体２と、本体２の上部に着脱自在に取り付けられる摩擦体３と、を備え、本体２は、基部２１と、基部２１の上部に設けられた当接部２２と、当接部２２から軸方向上方に突出する取付部２３と、取付部２３の外面に形成された雄ねじ部２４と、を備え、摩擦体３は、筒状の保持部５と、保持部５の内面に形成された雌ねじ部５１と、保持部５の外部に固着された摩擦部４と、摩擦部４の下部に設けられ保持部５の下端部より下方に位置する圧接部４２と、を備え、摩擦体３が取付部２３に取り付けられた状態において、雄ねじ部２４と雌ねじ部５１とが螺合されるとともに、当接部２２と圧接部４２とが圧接されてなる。 Friction device 1 is capable of thermally discoloring a thermochromic image or handwriting formed on a surface using thermochromic ink by rubbing the image or handwriting with the frictional heat generated during the friction. It comprises a main body 2 and a friction body 3 that is removably attached to the upper part of the main body 2. The main body 2 comprises a base 21, a contact portion 22 provided on the upper part of the base 21, an attachment portion 23 that protrudes axially upward from the contact portion 22, and a male threaded portion 24 formed on the outer surface of the attachment portion 23. The friction body 3 comprises a cylindrical holding portion 5, a female threaded portion 51 formed on the inner surface of the holding portion 5, a friction portion 4 fixed to the outside of the holding portion 5, and a pressure-contact portion 42 provided below the friction portion 4 and positioned below the lower end of the holding portion 5. When the friction body 3 is attached to the attachment portion 23, the male threaded portion 24 and the female threaded portion 51 are threadedly engaged, and the contact portion 22 and the pressure-contact portion 42 are pressure-contacted.
それにより、圧接部４２と当接部２２との間に摩擦力が働き、摩擦体３と本体２との螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３が本体２から脱落したりすることを回避できる。 This creates a frictional force between the pressure contact portion 42 and the abutment portion 22, preventing the threaded engagement between the friction body 3 and the main body 2 from loosening, and preventing the friction body 3 from wobbling or falling off the main body 2.
摩擦部４は、二色成形により保持部５に固着されることが好ましい。これにより、摩擦部４と保持部５とが強固に固着されるため、激しい使用時においても摩擦部４が保持部５から脱絡することを防ぐことができる。 The friction part 4 is preferably fixed to the holding part 5 by two-color molding. This firmly bonds the friction part 4 and the holding part 5, preventing the friction part 4 from becoming detached from the holding part 5 even during heavy use.
また、熱変色性インキが内蔵され且つ該熱変色性インキが吐出可能なペン先を有する軸筒を備えた熱変色性筆記具１１であって、軸筒が摩擦具１の本体２であってもよい。これにより、摩擦体３と軸筒との螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３が軸筒から脱落したりすることを回避できる。 Also, the thermochromic writing instrument 11 may include a barrel that contains thermochromic ink and has a pen tip that can eject the thermochromic ink, and the barrel may be the main body 2 of the friction instrument 1. This prevents the threaded engagement between the friction body 3 and the barrel from loosening, and prevents the friction body 3 from wobbling or falling off the barrel.
また、熱変色性インキが内蔵され且つ該熱変色性インキが吐出可能なペン先を有する軸筒と、該軸筒のペン先側に着脱自在に装着されるキャップと、を備えた熱変色性筆記具であって、キャップが摩擦具１の本体２であってもよい。これにより、摩擦体３とキャップとの螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３がキャップから脱落したりすることを回避できる。 Also, a thermochromic writing instrument may include a barrel that contains thermochromic ink and has a nib that can eject the thermochromic ink, and a cap that is removably attached to the nib side of the barrel, where the cap is the main body 2 of the friction device 1. This prevents the screw connection between the friction body 3 and the cap from loosening, and prevents the friction body 3 from wobbling or falling off the cap.
＜第２実施形態＞
図５乃至図７に、本発明の第２実施形態を示す。図５及び図６は、本発明の第２実施形態の摩擦体３の縦断面図及び斜視図である。図７は、図５及び図６に示す摩擦体３が図１に示す本体２に取り付けられた状態を示す要部縦断面図である。
Second Embodiment
A second embodiment of the present invention is shown in Figures 5 to 7. Figures 5 and 6 are a longitudinal sectional view and a perspective view of a friction body 3 according to the second embodiment of the present invention. Figure 7 is a longitudinal sectional view of a main part showing a state in which the friction body 3 shown in Figures 5 and 6 is attached to the main body 2 shown in Figure 1.
本発明の第２実施形態における第１実施形態とは違いは、摩擦体３の摩擦部４と、保持部５の形態である。具体的には、第２実施形態の圧接部４２は、当接部２２に圧接可能な、少なくとも一つの突起である。第２実施形態のその他の構成は、第１実施形態と略同様であるため、その詳細な説明は省略する。 The second embodiment of the present invention differs from the first embodiment in the configuration of the friction portion 4 and the retaining portion 5 of the friction body 3. Specifically, the pressure contact portion 42 of the second embodiment is at least one protrusion that can be pressed against the abutment portion 22. The other configuration of the second embodiment is substantially the same as that of the first embodiment, so a detailed description thereof will be omitted.
・摩擦部
図５乃至図７に示すように、本実施形態においては、摩擦部４は、保持部５の外周面及び上面に加えて、下面の一部を覆うように、二色成形により保持部５に一体に固着される。すなわち、摩擦部４は、円筒体よりなる。また、図５又は図６に示すように、保持部５の下端部は、摩擦体３の下面側に露出している。言い換えれば、保持部５の下端部は、摩擦体３の下面の一部と同一平面上に形成されている。
Frictional Part As shown in Figures 5 to 7, in this embodiment, the frictional part 4 is integrally fixed to the holding part 5 by two-color molding so as to cover not only the outer peripheral surface and the upper surface of the holding part 5 but also a part of the lower surface. That is, the frictional part 4 is made of a cylindrical body. Also, as shown in Figures 5 and 6, the lower end of the holding part 5 is exposed on the lower surface side of the friction body 3. In other words, the lower end of the holding part 5 is formed on the same plane as a part of the lower surface of the friction body 3.
・圧接部
図５又は図６に示すように、摩擦部４は、該摩擦部４の下部に設けられ保持部５の下端部より下方に位置する圧接部４２を備える。本実施形態において、圧接部４２は当接部２２に圧接可能な、３つの突起である。
5 or 6, the friction portion 4 includes a pressure contact portion 42 that is provided at the bottom of the friction portion 4 and positioned below the lower end of the holding portion 5. In this embodiment, the pressure contact portion 42 is three protrusions that can be brought into pressure contact with the abutting portion 22.
摩擦体３が本体２の取付部２３に取り付けられた状態において、当接部２２と圧接部４２（突起）とが圧接される。これにより、当接部２２と圧接部４２（突起）との間に摩擦力が働き、摩擦体３と本体２との螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３が本体２から脱落したりすることを回避できる。 When the friction body 3 is attached to the mounting portion 23 of the main body 2, the abutment portion 22 and the pressure contact portion 42 (protrusion) are pressed together. This creates a frictional force between the abutment portion 22 and the pressure contact portion 42 (protrusion), preventing the screw connection between the friction body 3 and the main body 2 from loosening and preventing the friction body 3 from wobbling or falling off the main body 2.
圧接部４２（突起）は、少なくとも１つ設けられていればよいが、複数個設けられていることが好ましい。突起が複数個設けられていることにより、本体２に摩擦体３を安定して螺合させることができる。特に、図６に示すように、突起が３つ設けられている場合、いずれの突起も確実に当接部２２に圧接され、安定して摩擦体を取り付けることができるため、より好ましい。 It is sufficient to have at least one pressure contact portion 42 (protrusion), but it is preferable to have multiple protrusions. Providing multiple protrusions allows the friction body 3 to be stably screwed onto the main body 2. In particular, as shown in Figure 6, providing three protrusions is more preferable, as all protrusions are reliably pressed against the abutment portion 22, allowing for stable attachment of the friction body.
圧接部４２（突起）は、図６に示す球形状以外にも、四角柱形状、径方向外方に延びる突条、ゲート部に形成される樹脂残り部（ゲート残り）などでもよい。特に、圧接部４２が該ゲート残りの場合、摩擦体３と本体２との螺合が緩むことをより防止でき、かつ安定して摩擦体を取り付けることができることに加えて、ゲート跡をユーザーから見えない場所に配置することができ、製品の美観を向上させる。 In addition to the spherical shape shown in Figure 6, the pressure-contact portion 42 (protrusion) may also be a square prism, a ridge extending radially outward, or a resin residue portion (gate residue) formed in the gate portion. In particular, when the pressure-contact portion 42 is a gate residue, loosening of the screw connection between the friction body 3 and the main body 2 can be more effectively prevented, allowing for stable attachment of the friction body. In addition, the gate residue can be positioned in a location that is not visible to the user, improving the aesthetic appearance of the product.
また、摩擦体３が本体２の取付部２３に取り付けられた状態において、圧接部４２（突起）が当接部２２に圧接されるとともに、保持部５の下端部も当接部２２に当接される。これにより、保持部５の下端部が螺合におけるストッパの効果を奏し、取付時の摩擦体の剛性を向上させる。さらに、より強固に摩擦体３と本体２を螺合することができるとともに、摩擦体３と本体２との螺合が緩むことを防止し、摩擦体３がぐらついたり、摩擦体３が本体２から脱落したりすることを回避できる。 In addition, when the friction body 3 is attached to the mounting portion 23 of the main body 2, the pressure contact portion 42 (protrusion) is pressed against the abutment portion 22, and the lower end of the holding portion 5 also abuts against the abutment portion 22. This allows the lower end of the holding portion 5 to act as a stopper during screwing, improving the rigidity of the friction body when attached. Furthermore, this allows the friction body 3 to be screwed more firmly to the main body 2, prevents the screwing between the friction body 3 and the main body 2 from loosening, and prevents the friction body 3 from wobbling or falling off the main body 2.
１ 摩擦具
１１ 熱変色性筆記具
２ 本体（軸筒、キャップ）
２１ 基部
２２ 当接部
２３ 取付部
２４ 雄ねじ部
２５ 通気孔
３ 摩擦体
４ 摩擦部
４１ 上端孔
４２ 圧接部
５ 保持部
５１ 雌ねじ部
５２ 内孔
５３ 段部
1 Friction tool 11 Thermochromic writing tool 2 Main body (shaft, cap)
21 Base portion 22 Contact portion 23 Mounting portion 24 Male thread portion 25 Vent hole 3 Friction body 4 Friction portion 41 Upper end hole 42 Pressure contact portion 5 Holding portion 51 Female thread portion 52 Inner hole 53 Step portion
Claims (4)
本体と、前記本体の上部に着脱自在に取り付けられる摩擦体と、を備え、
前記本体は、基部と、前記基部の上部に設けられた当接部と、前記当接部から軸方向上方に突出する取付部と、前記取付部の外面に形成された雄ねじ部と、を備え、
前記摩擦体は、
筒状の保持部と、
前記保持部の内面に形成された雌ねじ部と、
前記保持部の外周面、上面及び下面を連続して覆うように、二色成形により前記保持部に一体に固着された摩擦部と、
前記摩擦部の下部に設けられ前記保持部の下端部より下方に位置する圧接部と、を備え、
前記摩擦体が前記取付部に取り付けられた状態において、前記雄ねじ部と前記雌ねじ部とが螺合されるとともに、前記当接部と前記圧接部とが圧接されてなることを特徴とする摩擦具。 A friction tool that can cause a thermochromic image or handwriting formed on a surface to be written on using a thermochromic ink to be rubbed and can cause the thermochromic image or handwriting to be thermally discolored by the frictional heat generated at the time,
A main body and a friction body detachably attached to an upper part of the main body,
the main body includes a base portion, an abutment portion provided on an upper portion of the base portion, an attachment portion protruding axially upward from the abutment portion, and a male thread portion formed on an outer surface of the attachment portion,
The friction body is
A cylindrical holding portion;
A female screw portion formed on the inner surface of the holding portion;
a friction portion integrally fixed to the holding portion by two-color molding so as to continuously cover the outer peripheral surface, the upper surface, and the lower surface of the holding portion;
a pressure contact portion provided below the friction portion and positioned below a lower end of the holding portion,
When the friction body is attached to the attachment portion, the male threaded portion and the female threaded portion are threadedly engaged with each other, and the abutment portion and the pressure-contact portion are pressure-contacted with each other.
前記摩擦部の上端部には、上端孔が軸方向に貫設され、An upper end hole is formed in the axial direction at the upper end of the friction portion,
前記雌ねじ部の内径は、前記内孔上部の内径及び前記上端孔の内径よりも大きく、The inner diameter of the female threaded portion is larger than the inner diameter of the upper portion of the inner hole and the inner diameter of the upper end hole,
前記保持部の前記内孔上部と前記雌ねじ部との間に段部が形成されていることを特徴とする請求項１に記載の摩擦具。2. The friction device according to claim 1, wherein a step is formed between the upper portion of the inner hole of the holding portion and the female thread portion.
A thermochromic writing instrument comprising a barrel having a thermochromic ink built therein and a nib capable of ejecting the thermochromic ink, and a cap removably attached to the nib side of the barrel, wherein the cap is the main body of the friction tool described in claim 1 or 2.
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| US20100028068A1 (en) | 2008-08-01 | 2010-02-04 | Razalan Julius M | Correction Stick Equipped Pen and Pen Cap |
| JP2010188737A (en) | 2010-05-06 | 2010-09-02 | Pilot Ink Co Ltd | Thermal color-changing writing implement |
| JP2011224860A (en) | 2010-04-19 | 2011-11-10 | Pilot Ink Co Ltd | Thermochromic writing implement |
| JP2016003744A (en) | 2014-06-18 | 2016-01-12 | 薫和 半澤 | Overtightening / loosening prevention nut |
| JP2016203590A (en) | 2015-04-28 | 2016-12-08 | 三菱鉛筆株式会社 | Eraser and writing instrument |
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| KR102191748B1 (en) * | 2019-04-22 | 2020-12-17 | 주식회사 모나미 | Thermal discoloration ink writing instruments |
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|---|---|---|---|---|
| US20100028068A1 (en) | 2008-08-01 | 2010-02-04 | Razalan Julius M | Correction Stick Equipped Pen and Pen Cap |
| JP2011224860A (en) | 2010-04-19 | 2011-11-10 | Pilot Ink Co Ltd | Thermochromic writing implement |
| JP2010188737A (en) | 2010-05-06 | 2010-09-02 | Pilot Ink Co Ltd | Thermal color-changing writing implement |
| JP2016003744A (en) | 2014-06-18 | 2016-01-12 | 薫和 半澤 | Overtightening / loosening prevention nut |
| JP2016203590A (en) | 2015-04-28 | 2016-12-08 | 三菱鉛筆株式会社 | Eraser and writing instrument |
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