JP7132625B2 - compass - Google Patents

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JP7132625B2
JP7132625B2 JP2019153148A JP2019153148A JP7132625B2 JP 7132625 B2 JP7132625 B2 JP 7132625B2 JP 2019153148 A JP2019153148 A JP 2019153148A JP 2019153148 A JP2019153148 A JP 2019153148A JP 7132625 B2 JP7132625 B2 JP 7132625B2
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writing instrument
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knob
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compass
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JP2021030571A (en
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洋介 橡尾
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Kutsuwa Co Ltd
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Description

特許法第３０条第２項適用 （１）クツワ株式会社は、令和元年８月１・２日、クツワ株式会社営業本社（東大阪市長田中３－６－４０）で開催された、「２０２０新入学新商品商談会」にて、本願発明を展示した。 （２）クツワ株式会社は、令和元年８月７・８日、クツワ株式会社東京支社（東京都墨田区千歳２－８－３）で開催された、「２０２０新入学新商品商談会」にて、本願発明を展示した。Application of Article 30, Paragraph 2 of the Patent Act (1) Kutsuwa Co., Ltd. held a meeting on August 1 and 2, 2019 at Kutsuwa Co., Ltd. Sales Headquarters (3-6-40 Nagatanaka, Higashiosaka City). The invention of the present application was exhibited at the 2020 new student new product business meeting. (2) Kutsuwa Co., Ltd. participated in the “2020 new entrance new product business meeting” held at Kutsuwa Co., Ltd. Tokyo branch office (2-8-3 Chitose, Sumida-ku, Tokyo) on August 7 and 8, 2019. and exhibited the invention of the present application.

本発明は、円弧を描くためのコンパスであり、特に学習時の使用に適したものに関する。 The present invention relates to a compass for drawing arcs, particularly suitable for use when learning.

従来のコンパスは、先端に針を持つ中心脚と、先端に鉛筆等の筆記具を保持して回転させる回転脚と、回転脚及び中心脚を開閉自在に軸支した取付体と、該取付体の上方に突出した細長い略円柱状の操作体と、からなるものである（例えば特許文献１参照）。 A conventional compass has a central leg having a needle at its tip, a rotating leg that holds a writing instrument such as a pencil at its tip and rotates it, a mounting body that pivotally supports the rotating leg and the central leg so that they can be opened and closed, and the mounting body. and an elongated, substantially cylindrical operating body projecting upward (see Patent Document 1, for example).

このコンパスの使用方法は、細長い略円柱状の操作体を摘みながら、中心脚の針に対してノート等の紙面に浅く突き刺す程度の荷重を掛けつつ、回転脚に保持された筆記具に対して円弧を描き得る程度の荷重を掛けながら、操作体を該中心脚周りに所定の角度まで回転させるものである。 The method of using this compass is to apply a load to the stylus of the central leg so that it pierces the surface of a notebook or other paper shallowly while pinching the slender, substantially cylindrical operating body, and then move the writing instrument held by the rotating leg in an arc. The operating body is rotated around the center leg to a predetermined angle while applying a load that can draw a .

一方、小学校の授業において子供がコンパスを使用する場合、細長い操作体を親指と人差し指とで摘みながら、中心脚及び回転脚の両脚に異なる荷重を掛けると同時に、操作体を中心脚周りに回転させて正確な円弧を描くことが難しく、学習時のつまずきやすい点になってしまうおそれがある。そのため、操作体の形状を球体にして指先の間で回転しやすくしたものや、操作体にキャップを装着して手指全体で握りやすくすることで、操作体を中心脚周りに回転する操作を平易にして、所定の半径の円弧を描くこと目的とする種々のコンパスが提案されている（例えば特許文献２－４参照）。 On the other hand, when a child uses a compass in an elementary school class, while picking up the elongated operating body between the thumb and index finger, different loads are applied to both legs of the central leg and the rotating leg, and the operating body is rotated around the central leg. It can be difficult to draw an accurate arc with the mouse, and it can become a stumbling block when learning. For this reason, by making the operation body spherical and making it easier to rotate between the fingertips, or by attaching a cap to the operation body so that it can be easily gripped with the entire finger, the operation of rotating the operation body around the center leg is simplified. Various compasses have been proposed for the purpose of drawing an arc with a predetermined radius (see Patent Documents 2 to 4, for example).

しかしながら、上述した特許文献２－４のコンパスは、依然として、子供が使用する場合、中心脚の針に対してノート等の紙面に突き刺すための荷重を掛けつつ、回転脚に保持された筆記具に対して円を描き得る程度の荷重を掛けることが難しく、所定の半径を保ちながら円弧を描くことが困難である。 However, when the compasses of Patent Documents 2 to 4 described above are still used by a child, the stylus of the central leg is applied with a load to pierce the paper surface of a notebook or the like, and the writing instrument held by the rotating leg is It is difficult to apply a load that can draw a circle with a force, and it is difficult to draw a circular arc while maintaining a predetermined radius.

特開平１０－１９３８７７号公報（ 特許第３１６０７６１号 ）Japanese Patent Application Laid-Open No. 10-193877 (Patent No. 3160761) 特表２０００－５０５３７４号公報Japanese Patent Publication No. 2000-505374 特開平８－３９９９０号公報JP-A-8-39990 特開２０１１－２１８７５２号公報JP 2011-218752 A

そのため、摘みやすさや子供の操作能力等を考慮しながら、円弧の描き始めから描き終わりまでの間において、コンパスの両脚に異なる荷重を掛けながら回転脚を回しやすくなる摘み方に調整するとともに、円弧の描き終わりにかけて操作体を指先間で転動させることが容易にできるコンパスが望まれている。 Therefore, while considering the ease of picking and the ability of children to operate the compass, we adjusted the picking method to make it easier to turn the rotating leg while applying different loads to both legs of the compass from the beginning to the end of drawing the arc. There is a demand for a compass in which the operating body can be easily rolled between the fingertips toward the end of drawing.

本発明は、上記課題に鑑み、先端に針を持つ中心脚と、筆記具を保持する筆記具保持体と、該筆記具保持体を前記中心脚周りに回転させる回転脚と、前記中心脚及び前記回転脚の基端を開閉自在に軸支する軸部と、使用者が操作する操作体と、を備えてなり、
前記操作体は、上方に位置する指腹で転動させるための転動部と、該転動部の下方に位置し、前記軸部の下方に至るまで表面を有する指先で摘むための摘み部と、を有し、
前記摘み部と前記転動部とは、横断面形状が異なる略柱体であり、下方に位置する前記摘み部が略三角柱体で上方に位置する前記転動部が略円柱形状であって両者が連続していることを特徴とするものである。 In view of the above problems, the present invention provides a central leg having a needle at its tip, a writing instrument holder that holds a writing instrument, a rotary leg that rotates the writing instrument holder around the central leg, the central leg and the rotary leg. and an operating body operated by a user,
The operation body includes a rolling portion for rolling with a finger pad located above, and a grip portion located below the rolling portion and having a surface extending to the bottom of the shaft portion for picking with the fingertips. , has
The knob portion and the rolling portion are substantially cylindrical bodies having different cross-sectional shapes, and the knob portion positioned below has a substantially triangular prism shape, and the rolling portion positioned above has a substantially cylindrical shape. It is characterized in that both are continuous .

また、上述した構成に加え、摘み部は、第一摘み面から差込部を隔てた位置の角部から前記第一摘み面まで開閉方向に対して傾斜して略逆Ｖ字状に配設された第二摘み面及び第三摘み面と、を側面とする略角柱体からなることが好ましい。 In addition to the above-described structure, the knob portion is arranged in a substantially inverted V shape inclined with respect to the opening/closing direction from the corner portion located apart from the insertion portion from the first knob surface to the first knob surface. It is preferable that the second gripping surface and the third gripping surface are formed as side surfaces and are formed of a substantially prismatic body.

また、上述した構成に加え、摘み部は、親指の指先で接触するための第一平面領域を備えた第一摘み面と、人差し指の指先を接触するための第二平面領域を備えた第二摘み面と、中指の指先を接触させるための第三平面領域を備えた第三摘み面と、を有することが好ましい。 In addition to the configuration described above, the knob portion includes a first knob surface having a first flat area for contact with the tip of the thumb and a second flat area having a second flat area for contact with the tip of the index finger. It preferably has a picking surface and a third picking surface with a third flat area for contacting the tip of the middle finger.

請求項１－３記載の発明によれば、摘みやすさや子供の操作能力等を考慮するいわゆる人間工学的な観点から、円弧の描き始めから描き終わりまでの間において、コンパスの中心脚及び回転脚に異なる荷重を掛ける際に操作し易い位置で安定して摘みながら保持することができるとともに、円弧の描き終わりにかけて操作体を指先間で転動させることを容易にすることが可能なコンパスを提供することが可能である。 According to the invention described in claims 1 to 3, from the so-called ergonomic point of view considering the ease of picking and the operation ability of children, the central leg and the rotating leg of the compass from the beginning to the end of drawing an arc To provide a compass which can be stably picked and held at an easy-to-operate position when a different load is applied to a compass, and which can easily roll an operating body between fingertips toward the end of drawing an arc. It is possible to

本発明の実施形態に係るコンパスの一例を示す斜視図である。1 is a perspective view showing an example of a compass according to an embodiment of the invention; FIG. 図１の操作体のみの背面側からみた拡大斜視図である。FIG. 2 is an enlarged perspective view of only the operation body of FIG. 1 as seen from the rear side; 図２の(a)正面図、(b)背面図、(c)左側面図、(d)右側面図、(e)平面図、(f)底面図である。They are (a) a front view, (b) a rear view, (c) a left side view, (d) a right side view, (e) a plan view, and (f) a bottom view of FIG. 図１のコンパスの使用した円弧の(a)描き始め、(b)描き途中、(c)描き終わり、におけるコンパスの動作図、及び、それぞれ操作体と手指との関係を示す断面図である。FIG. 2 is an operation diagram of the compass at (a) the beginning of drawing, (b) the middle of drawing, and (c) the end of drawing an arc using the compass of FIG. 1, and cross-sectional views showing the relationship between the operating body and fingers, respectively. 図１の筆記具収納機構を示す(a)拡大斜視図、(b)拡大分解斜視図である。1. It is (a) an expansion perspective view, (b) expansion exploded perspective view which shows the writing instrument storage mechanism of FIG. 図５の筆記具収納機構によって筆記具を収納した状態を示す(a)平面図、(b)左側側面図、(c)右側側面図である。6 is (a) a plan view, (b) a left side view, and (c) a right side view showing a state in which a writing instrument is housed by the writing instrument housing mechanism of FIG. 5. FIG.

本発明の実施形態について図１－６に基づいて詳細に説明する。なお、本実施形態の説明をする上で、所定の円弧の中心位置を円中心、中心脚及び回転脚の開閉する方向を開閉方向Ｘとする。また、指先は指の先端から指腹にかかるまでの略曲面部であり、指腹は指先から関節周辺までの略平面部とするものであり、子供の親指、人差し指、中指の指腹の長さは、概ね１ｃｍから３ｃｍ程度を想定している。 Embodiments of the present invention will now be described in detail with reference to FIGS. 1-6. In describing the present embodiment, the center position of a predetermined arc is defined as the center of the circle, and the opening/closing direction X is defined as the opening/closing direction of the center leg and the rotating leg. In addition, the fingertip is a substantially curved portion from the tip of the finger to the finger pad, and the finger pad is a substantially flat portion from the fingertip to the vicinity of the joint. The height is assumed to be approximately 1 cm to 3 cm.

（実施形態）
本発明のコンパスは、先端に針１２を持つ中心脚１０と、筆記具５０を保持する筆記具保持体４０と、筆記具保持体４０を中心脚１０周りに回転させる回転脚２０と、回転脚２０及び中心脚１０を開閉自在に軸支する軸部３３を有する操作体３０と、を備えてなるものである。 (embodiment)
The compass of the present invention comprises a central leg 10 having a needle 12 at its tip, a writing instrument holder 40 holding a writing instrument 50, a rotary leg 20 rotating the writing instrument holder 40 around the central leg 10, the rotary leg 20 and the center and an operation body 30 having a shaft portion 33 that pivotally supports the leg 10 so as to be openable and closable.

中心脚１０は、亜鉛等の金属材を主体として鋳型製造された棒状の中心脚本体１１と、中心脚本体１１の先端にはノート等の紙面上に突き刺して固定するための針１２と、を有するものである。この中心脚本体１１の先端周辺は、基端に比べて約２倍程度の厚みの増した肉厚部１１ａを中心脚本体１１の全体の３分の１程度の長さまで設けることで、従来のコンパスに比べて、コンパス全体の重心位置が中心脚１１（特に、肉厚部１１ａ付近）に寄って低重心とすることで、後述するコンパスの使用方法の際に軽い力で回転脚２０を回転させて円弧を描きやすくすることができる。 The center leg 10 includes a rod-shaped central script body 11 which is mainly made of a metallic material such as zinc, and a needle 12 at the tip of the central script body 11 for sticking and fixing on the paper surface of a notebook or the like. have. Around the front end of the central leg body 11, a thick portion 11a, which is about twice as thick as the base end, is provided up to about one-third the length of the entire central leg body 11, thereby achieving a conventional structure. Compared to the compass, the center of gravity of the entire compass is closer to the center leg 11 (especially near the thick part 11a) to make the center of gravity lower, so that the rotating leg 20 can be rotated with a light force when using the compass to be described later. to make it easier to draw arcs.

回転脚２０は、中心脚１０に比べて重量が軽くなるように、プラスチック材等の合成樹脂材を主体として形成された回転脚本体２１と、回転脚本体２１の先端に設けられた筆記具保持体４０と、該筆記具保持体４０に保持された状態の筆記具５０の先端を回転脚本体２１内に収納するための筆記具収納機構と、を有するものである。この回転脚２０は、中心脚１０よりも比較的重量が軽いため、従来のコンパスに比べて、後述するコンパスの使用方法の際に軽い力で回転脚２０を回転させて円弧を描きやすくすることができる。 The rotary leg 20 is composed of a rotary script body 21 mainly made of a synthetic resin material such as a plastic material so as to be lighter in weight than the central leg 10, and a writing instrument holder provided at the tip of the rotary script body 21. 40 and a writing instrument storage mechanism for storing the tip of the writing instrument 50 held by the writing instrument holder 40 in the rotating script body 21 . Since the rotating leg 20 is relatively lighter in weight than the central leg 10, the rotating leg 20 can be rotated with a light force when using the compass, which will be described later, to make it easier to draw an arc compared to a conventional compass. can be done.

この回転脚本体２１は、上述した中心脚本体１１を収納し得るように、回転脚本体２１の基端から先端にかけて、中心脚本体１１側の面を開口させ、回転脚本体２１の内部を中空状の断面略Ｕ字状に形成されるとともに、回転脚本体２１の先端付近は中心脚本体１１の肉厚部１１ａと筆記具５０を回転させて収納した状態のまま収納し得るように、回転脚本体２１全体に比べて若干程度拡開して形成された収納部２１ａを有するものである。 This rotating script body 21 has an open surface on the side of the central script body 11 from the base end to the tip of the rotating script body 21 so that the above-described central script body 11 can be accommodated, and the inside of the rotating script body 21 is hollow. , and near the leading end of the rotating script body 21, a rotating leg is provided so that the thick portion 11a of the central script body 11 and the writing instrument 50 can be rotated and accommodated. It has a storage portion 21a that is formed to be slightly wider than the entire main body 21. As shown in FIG.

筆記具保持体４０は、筆記具５０を挿入した状態で嵌合保持するための嵌合保持部４１と、嵌合保持部４１に挿入した状態の位置を固定して締め付けるための環状の締付部４２と、がプラスチック材等の合成樹脂材を主体として一体形成されたものである。また、この筆記具保持体４０は、筆記具５０を回転脚本体２１内に収納するために、後述する回転脚本体２１の挟持部２１ｂに回動自在に軸支する凹状の軸受部４１ａと、中心脚１０の針１２全体を覆い隠すように締付部４２から膨出して形成された針保護部４２ａと、筆記具５０を収納した状態及び筆記具５０の先端部５１と中心脚１０の針１２とが同方向に向いた状態で固定するための係合凹部４１ｂ、４１ｂと、を有するものである。さらに、この筆記具保持体４０は、筆記具５０をより一層しっかりと締付けて保持するために、締付部４２の両端に設けられた開孔部４２ｂ、４２ｂと、該開孔部４２ｂ、４２ｂにねじ込んで開孔部４２ｂ、４２ｂ間の距離を調節するための締付ねじ４３を有するものである。 The writing instrument holder 40 includes a fitting holding portion 41 for fitting and holding the writing instrument 50 in an inserted state, and an annular tightening portion 42 for fixing and tightening the position of the inserted writing instrument 50 in the fitting holding portion 41. and are integrally formed mainly of a synthetic resin material such as a plastic material. In order to accommodate the writing instrument 50 in the rotary script body 21, the writing instrument holder 40 includes a concave bearing portion 41a rotatably supported by a clamping portion 21b of the rotary script body 21, which will be described later, and a center leg. The needle protection portion 42a formed by swelling from the tightening portion 42 so as to cover the entirety of the needle 12 of 10, and the tip portion 51 of the writing instrument 50 and the needle 12 of the central leg 10 in the state where the writing instrument 50 is housed are the same. It has engaging recesses 41b, 41b for fixing in a state facing the direction. Further, the writing instrument holder 40 has openings 42b, 42b provided at both ends of the clamping part 42 and screwed into the openings 42b, 42b in order to clamp and hold the writing instrument 50 more firmly. has a tightening screw 43 for adjusting the distance between the openings 42b, 42b.

締付部４２は、円弧を描くために筆記具保持体４０を回転させて筆記具５０の先端部５１を中心脚１０の針１２と同じ方向に向けて配置させた際に回転脚本体２１の被覆部２４ｂ内の外周面に当接して筆記具保持体４０を所定の角度に維持するために、締付部４２の回転脚本体２１側の外周面上に形成された略円柱状の突起４４を有するものである。 The tightening portion 42 covers the rotating script body 21 when the writing instrument holder 40 is rotated to draw a circular arc and the tip portion 51 of the writing instrument 50 is arranged in the same direction as the needle 12 of the central leg 10. In order to maintain the writing instrument holder 40 at a predetermined angle by contacting the outer peripheral surface inside 24b, a substantially cylindrical projection 44 is formed on the outer peripheral surface of the rotary script body 21 side of the tightening portion 42. is.

操作体３０は、特に図２、図３（ａ）から（ｆ）に示すように、指先に対して十分に当接し得る程度の約１ｃｍ程度の幅ｗと、指先から関節までの間の指腹の長さまで十分に当接し得る程度の約３ｃｍ程度の高さｈと、を備えた太めの略柱体である。従来のコンパスは取付体と軸細の操作体とが上下に配置されるものであるから、子供にとっては使い勝手が良くなかったところ、本実施形態の操作体３０は長く（高く）かつ太いものである。操作体３０の高さｈは、その上端から軸部３３よりも下方に下端を有する程度にまで長く、太さは後述の第一摘み面３１ａの横幅が回転脚２０と中心脚１０とを閉じた状態の横幅よりも太くなっている（図６参照）。 As shown in FIGS. 2 and 3(a) to 3(f), the operation body 30 has a width w of about 1 cm that allows sufficient contact with the fingertip and a width w of about 1 cm between the fingertip and the joint. It is a thick, substantially columnar body with a height h of about 3 cm, which is enough to make contact with the length of the belly. Since a conventional compass has a mounting body and a thin operating body arranged vertically, it is not convenient for children to use. be. The height h of the operating body 30 is long enough to have the lower end below the shaft portion 33 from the upper end thereof, and the width of the first knob surface 31a described later closes the rotating leg 20 and the central leg 10. It is thicker than the width of the folded state (see FIG. 6).

本実施形態の操作体３０は、中心脚１０及び回転脚２０の基端を開閉自在に軸支する軸部３３を有し、この軸部３３周辺を指先で摘むための摘み部３１と、摘み部３１の上方において指腹で転動させるための転動部３２と、を有するもので、下方に位置する摘み部３１が略三角柱で上方に位置する転動部３２が略円柱形状であって、両者が連続している。また、この操作体３０の下端から中央付近にかけて中心脚１０及び回転脚２０の基端を差し込むとともに、中心脚１０及び回転脚２０の開閉動作をするため左右の開閉方向Ｘに位置する操作体３０の側面を開口した凹状の差込部３４を有するものである。 The operating body 30 of this embodiment has a shaft portion 33 that pivotally supports the base ends of the central leg 10 and the rotary leg 20 so as to be openable and closable. and a rolling part 32 for rolling with a finger pad above the finger pad 31. The knob part 31 positioned below has a substantially triangular prism shape, and the rolling part 32 positioned above has a substantially cylindrical shape, both are continuous. In addition, the base end of the central leg 10 and the rotating leg 20 is inserted from the lower end to the vicinity of the center of the operating body 30, and the operating body 30 positioned in the left and right opening/closing direction X in order to open and close the central leg 10 and the rotating leg 20. It has a recessed insertion portion 34 with an open side surface.

摘み部３１は、少なくとも、中心脚１０及び回転脚２０の開閉方向Ｘに対して平行に配設された第一摘み面３１ａと、第一摘み面３１ａから差込部３４を隔てた位置の角部３５から第一摘み面３１ａまで開閉方向Ｘに対して傾斜して略逆Ｖ字状に配設された第二摘み面３１ｂ及び第三摘み面３１ｃと、を側面とする略角柱体からなるものである。なお、指先で摘むための適切な箇所を明確にするために、本実施形態に例示するように、第一摘み面３１ａ、第二摘み面３１ｂ、及び、第三摘み面３１ｃのみの３つの側面とする略三角柱体からなることがより好適である。なお、この「略」とは、角部３５等を丸めた形態を含むものとしている。 The knob portion 31 includes at least a first knob surface 31a arranged parallel to the opening/closing direction X of the central leg 10 and the rotating leg 20, and a corner located at a position separated from the first knob surface 31a by the insertion portion 34. It is composed of a substantially prismatic body having side surfaces of a second knob surface 31b and a third knob surface 31c which are arranged in a substantially inverted V-shape from the portion 35 to the first knob surface 31a with respect to the opening/closing direction X. It is. In addition, in order to clarify the appropriate place for picking with the fingertips, as illustrated in this embodiment, only three side surfaces of the first pinching surface 31a, the second pinching surface 31b, and the third pinching surface 31c It is more preferable to be composed of a substantially triangular prismatic body. It should be noted that the term "substantially" includes a shape in which the corners 35 and the like are rounded.

第一摘み面３１ａは、少なくとも親指６１の指先が十分に接する程度の第一平面領域３６ａを有しながら、親指６１の指先の中央の位置に操作体３０の軸部３３と一致するように配置させる。また、第二摘み面３１ｂ及び第三摘み面３１ｃは、第一摘み面３１ａと同様に、少なくとも人差し指６２及び中指６３の指先が十分に接触する程度の第二平面領域３６ｂ及び第三平面領域３６ｃを有し、人差し指６２及び中指６３をそれぞれ回転脚２０及び中心脚１０の基端側をそれぞれの摘み面３１ａ、３１ｂ、３１ｃを介して保持しやすく配設されるものである。また、これらの平面領域３６ａ、３６ｂ、３６ｃの幅は、操作体３０の下端側が最大幅を有し、操作体３０の高さｈの２分１から３分の２程度の高さに達するまでに徐々に減少するようになっている。なお、この平面領域３６ａ、３６ｂ、３６ｃは、完全な平面形状ではなく、後述する転動部３２に比べて、指先に十分に接触する程度のものであればよく、本実施形態では最大で曲率半径１２．５ｍｍ程度となるように湾曲させているものである。 The first picking surface 31a has a first plane area 36a that is sufficiently in contact with at least the fingertip of the thumb 61, and is arranged at the center of the fingertip of the thumb 61 so as to coincide with the shaft portion 33 of the operating body 30. Let Further, the second and third picking surfaces 31b and 31c, like the first picking surface 31a, have a second flat area 36b and a third flat area 36c that are sufficiently contactable with at least the fingertips of the index finger 62 and the middle finger 63. , so that the index finger 62 and the middle finger 63 can be easily held on the base end sides of the rotating leg 20 and the central leg 10 via the respective picking surfaces 31a, 31b, and 31c. Further, the widths of these planar regions 36a, 36b, and 36c have a maximum width at the lower end side of the operating body 30, and reach a height of about 1/2 to 2/3 of the height h of the operating body 30. is gradually decreasing. Note that the planar regions 36a, 36b, and 36c do not have a perfect planar shape, and may have a degree of contact with the fingertips sufficiently compared to the rolling portion 32 described later. It is curved so as to have a radius of about 12.5 mm.

転動部３２は、上述した摘み部３１の平面領域３６ａ、３６ｂ、３６ｃが上方に向かって減少し、操作体の高さｈの２分の１から３分の２程度の高さから上端にかけて、やや先細り形状になりながら角部３５を有しない直径１ｃｍ程度の略円柱体からなるものであり、この円柱体側面の表面積は、少なくとも親指６１と人差し指６２の指腹で常に接触する程度の大きさを有するものである。 In the rolling portion 32, the flat areas 36a, 36b, and 36c of the knob portion 31 described above decrease upward, and extend from a height of about 1/2 to 2/3 of the height h of the operating body to the upper end. , which has a slightly tapered shape but does not have corners 35 and has a diameter of about 1 cm. has a size of

筆記具収納機構は、回転脚本体２１の先端を回転脚本体２１の中心線上よりやや中心脚と反対方向の外側に折曲形成するとともに、回転脚本体２１の先端を二股状に分岐して形成された挟持部２１ｂと、挟持部２１ｂの対向する内側面には筆記具保持体４０の軸受部４１ａを回動自在に軸支するための凸状の保持体軸部２２と、を有するものである。 The writing instrument storage mechanism is formed by bending the front end of the rotary script body 21 slightly outward from the center line of the rotary script body 21 in the direction opposite to the central leg, and by bifurcating the tip of the rotary script body 21. and a holding member shaft portion 22 for rotatably supporting the bearing portion 41a of the writing instrument holding member 40 on the opposing inner surface of the holding portion 21b.

挟持部２１ｂは、筆記具５０の先端部５１が中心脚１０の針１２と同じ方向に向いた状態（後述の描き始め状態）から、縦方向に約１８０度程度で回動させて回転脚本体２１の中心線とほぼ同一直線上に位置させた際において筆記具５０の先端部５１付近を保護し得
るように、二股状に挟持部２１ｂの分岐する付近に筆記具５０の先端部５１（鉛筆の芯先付近）の外観形状（本実施形態では略三角形状）のスリットからなる筆記具先端保護部２４と、筆記具の先端部を保護するように収納した状態及びコンパスの両脚を所定の幅で開脚した開状態で筆記具保持体を固定するための係合凸部２３、２３と、を有するものである。 The gripping portion 21b rotates about 180 degrees in the vertical direction from a state in which the tip portion 51 of the writing instrument 50 faces in the same direction as the needle 12 of the central leg 10 (a drawing start state, which will be described later). In order to protect the vicinity of the tip 51 of the writing instrument 50 when it is positioned substantially on the same straight line as the center line of the writing instrument 50, the tip 51 of the writing instrument 50 (lead tip of a pencil) A writing instrument tip protection part 24 consisting of a slit having an external shape (approximately triangular in this embodiment), and a state in which the writing instrument is housed so as to protect the tip part of the writing instrument and both legs of the compass are spread to a predetermined width. and engaging projections 23, 23 for fixing the writing instrument holder in a state.

筆記具先端保護部２４は、筆記具５０の先端部５１を中心脚１０の針１２と同方向に向けて円弧を描き始める状態において、筆記具保持体４０の締付部４２周辺に当接して筆記具保持体４０が１８０度以上の回転を防止するために、筆記具先端保護部２４の下端付近から筆記具５０の先端部５１付近に接しない程度に突出して形成された一対の受片２４ａ、２４ａを有するものである。 The writing instrument tip protection part 24 abuts around the tightening part 42 of the writing instrument holder 40 in a state where the tip part 51 of the writing instrument 50 is directed in the same direction as the needle 12 of the central leg 10 and begins to draw an arc. In order to prevent the writing instrument 40 from rotating more than 180 degrees, it has a pair of receiving pieces 24a, 24a formed so as to protrude from the vicinity of the lower end of the writing instrument tip protection part 24 to such an extent that they do not come in contact with the vicinity of the tip part 51 of the writing instrument 50. be.

また、この筆記具先端保護部２４は、筆記具５０の先端部５１を上方から覆い隠すとともに筆記具保持体４０の締付部４２に当接して筆記具保持体４０の角度を維持するために、筆記具先端保護部２４の側縁全体及び回転脚本体２１の上面から延出して傘状に形成された被覆部２４ｂを有するものである。 The writing instrument tip protection part 24 covers the tip part 51 of the writing instrument 50 from above and contacts the tightening part 42 of the writing instrument holder 40 to maintain the angle of the writing instrument holder 40. It has an umbrella-shaped covering portion 24b extending from the entire side edge of the portion 24 and the upper surface of the rotary leg body 21. As shown in FIG.

次に、上述したコンパスの使用方法について図４に基づいて詳細に説明する。 Next, a method of using the compass described above will be described in detail with reference to FIG.

（使用方法）
初めに、筆記具保持体４０を回転させて筆記具５０の先端部５１を中心脚１０の針１２と同じ方向に向けて配置させた後、中心脚１０及び回転脚２０を開動作させて所定の半径に設定する。その後、親指６１を第一摘み面３１ａ、人差し指６２を第二摘み面３１ｂ、及び、中指６３を第三摘み面３１ｃ、にそれぞれ押圧させながら三本の指で操作体３０を摘みながら、操作体３０をひねるように回転させ、後述する描き始めから描き途中を経て描き終わりのように操作して円を描くものである。 (how to use)
First, the writing instrument holder 40 is rotated so that the tip 51 of the writing instrument 50 faces the same direction as the needle 12 of the central leg 10, and then the central leg 10 and the rotary leg 20 are opened to a predetermined radius. set to Thereafter, while pressing the thumb 61 against the first pinching surface 31a, the index finger 62 against the second pinching surface 31b, and the middle finger 63 against the third pinching surface 31c, the operating body 30 is pinched with the three fingers. 30 is rotated in a twisting manner, and a circle is drawn by operating from the start of drawing, through the middle of drawing, to the end of drawing, which will be described later.

描き始めは、図４（ａ）に示す円弧の中心角度０度から１８０度程度の範囲を描く動作であり、中心脚１０の針１２をノート等の紙面に突き刺しながら、回転脚２０に固定された筆記具保持体４０に保持された筆記具５０に適宜の荷重を掛ける。このとき、親指６１で押圧する第一摘み面３１ａ側でコンパス全体のバランスを保ちながら、人差し指６２で押圧する第二摘み面３１ｂを介して中心脚１０の針１２を軽く突き刺す程度に荷重を調節するとともに、中指６３で押圧する第三摘み面３１ｃを介して筆記具５０の先端部５１に所定の円弧を描くことができる程度の荷重を加えるように調節する。 At the beginning of drawing, an arc shown in FIG. 4(a) is drawn in a range of a center angle of 0 to 180 degrees. An appropriate load is applied to the writing instrument 50 held by the writing instrument holder 40 . At this time, while maintaining the balance of the entire compass on the side of the first picking surface 31a pressed by the thumb 61, the load is adjusted to the extent that the needle 12 of the central leg 10 is lightly pierced through the second picking surface 31b pressed by the index finger 62. At the same time, the tip 51 of the writing instrument 50 is adjusted to apply a load to draw a predetermined circular arc via the third gripping surface 31c pressed by the middle finger 63. As shown in FIG.

描き途中は、図４（ｂ）に示す概ね円弧の中心角度１８０から２７０度程度の範囲で円弧を描く動作であり、上述した描き始め状態の荷重を維持しながら、中指６３を第三摘み面３１ｃから徐々に離していくとともに、第一摘み面３１ａ及び第二摘み面３１ｂのやや上方に親指６１と人差し指６２の指先が移動する。 In the middle of drawing, an arc is drawn in the range of about 180 to 270 degrees at the central angle of the arc shown in FIG. 4(b). While gradually separating from 31c, the fingertips of the thumb 61 and the index finger 62 move slightly above the first picking surface 31a and the second picking surface 31b.

描き終わりでは、図４（ｃ）に示す円弧の中心角度２７０度から３６０度程度の範囲の円弧を描く動作であり、描き途中状態から円弧の描き始めた位置まで回転脚２０及び筆記具保持体４０に保持された筆記具５０を回転させるため、転動部３２を親指６１及び人差し指６２の指先から指腹全体で転動させることで完全に一周した円を描く。 At the end of drawing, it is an operation to draw an arc in the range of the central angle of the arc from 270 degrees to 360 degrees shown in FIG. 4(c). In order to rotate the writing instrument 50 held in the circle, the rolling part 32 is rolled from the fingertips of the thumb 61 and the index finger 62 over the entire finger pad to draw a complete circle.

したがって、上述したコンパスの操作体３０によって、摘みやすさや子供の操作能力等を考慮しながら、円弧の描き始めから描き終わりまでの間において、コンパスの中心脚１０及び回転脚２０に異なる荷重を掛けやすくなるとともに、円弧の描き終わりにかけて操作体３０を親指及び人差し指の指先間で転動させることを容易にすることが可能である。 Therefore, by using the compass operation body 30 described above, different loads are applied to the compass center leg 10 and the rotating leg 20 from the beginning to the end of drawing a circular arc, while taking into consideration the ease of picking and the ability of a child to operate the compass. In addition, it is possible to easily roll the operating body 30 between the fingertips of the thumb and index finger toward the end of drawing the arc.

次に、上述したコンパスの筆記具収納機構の収納方法について図５、６に基づいて詳細に説明する。 Next, a detailed description will be given of a storage method of the writing instrument storage mechanism of the compass described above with reference to FIGS.

（収納方法）
筆記具収納機構は、コンパスで円弧の描き終わり状態から、筆記具保持体４０及び筆記具５０を縦方向に概ね１８０度回転させ、筆記具５０の先端部５１を挟持部２１ｂの筆記具先端保護部２４に位置させる。このとき、挟持部２１ｂの対向する内側面に形成された係合凸部２３、２３と、筆記具保持体４０の外周面に形成された係合凹部４１ｂ、４１ｂと、が係合し、回転脚２０の中心線上に筆記具が反転したままの収納状態が保持される。 (Storage method)
The writing instrument housing mechanism rotates the writing instrument holding body 40 and the writing instrument 50 by approximately 180 degrees in the vertical direction from the state where the compass has finished drawing an arc, and positions the tip portion 51 of the writing instrument 50 on the writing instrument tip protection portion 24 of the clamping portion 21b. . At this time, the engaging protrusions 23, 23 formed on the opposing inner surfaces of the holding portion 21b and the engaging recesses 41b, 41b formed on the outer peripheral surface of the writing instrument holder 40 are engaged with each other, and the rotary leg is rotated. The stored state in which the writing instrument is inverted on the center line of 20 is maintained.

その後、中心脚本体１１を回転脚２０の収納部２１ａに収納させるように閉動作させる。このとき、筆記具保持体４０の締付部４２周縁から膨出して形成された針保護部４２ａによって、中心脚１０の針１２が覆うように隠されて保護される。 After that, the central leg body 11 is retracted into the storage portion 21a of the rotary leg 20 so as to be closed. At this time, the needle 12 of the central leg 10 is hidden and protected by the needle protection portion 42a formed by swelling from the peripheral edge of the fastening portion 42 of the writing instrument holder 40. As shown in FIG.

したがって、上述したコンパスの筆記具収納機構によって、筆記具保持体４０を回転させて、筆記具５０の先端部（本実施形態では鉛筆の芯先）を回転脚２０の挟持部２１ｂの筆記具先端保護部２４で保護するように収納し、かつ、中心脚１０の針１２を筆記具保持体４０の針保護部４２ａで保護することができ、筆記具５０を筆記具保持体４０に嵌合保持させたままでも、従来のコンパスに比べて、コンパス全体（中心脚１０、回転脚２０、筆記具保持体４０、筆記具５０）を一直線に揃えて小さくまとめることができるとともに、一時的に使用しない際に机上等に筆記具５０を嵌合保持させた状態のまま筆記具５０の先端及び中心脚１０の針１２を保護した状態で安全に置いておくことが可能である。 Therefore, by rotating the writing instrument holding body 40 by the writing instrument storage mechanism of the compass described above, the tip of the writing instrument 50 (in this embodiment, the lead tip of a pencil) is held by the writing instrument tip protection portion 24 of the clamping portion 21b of the rotary leg 20. The needle 12 of the central leg 10 can be stored in a protective manner, and the needle 12 of the writing instrument holder 40 can be protected by the needle protection portion 42a of the writing instrument holder 40. Compared to a compass, the entire compass (the central leg 10, the rotating leg 20, the writing instrument holder 40, and the writing instrument 50) can be arranged in a straight line and compacted, and the writing instrument 50 can be fitted on a desk or the like when not in use temporarily. The tip of the writing instrument 50 and the stylus 12 of the central leg 10 can be safely placed while being held together.

上記の実施形態では本発明の好ましい実施形態を例示したが、本発明は上記の実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内で改善や変更が可能である。例えば、本実施形態では鉛筆を保持するための筆記具保持体を一例としているが、内蔵された芯を繰り出す機構を備えたシャープペンシル等を保持するものであってもよい。 Although the preferred embodiments of the present invention have been illustrated in the above embodiments, the present invention is not limited to the above embodiments, and improvements and modifications are possible within the scope of the claims. For example, in the present embodiment, a writing instrument holder for holding a pencil is taken as an example, but a mechanical pencil or the like having a built-in lead feeding mechanism may also be held.

10…中心脚、11…中心脚本体、11a…肉厚部、12…針、
20…回転脚、21…回転脚本体、21a…収納部、21b…挟持部、22…保持体軸部、23…係合凸部、24…筆記具先端保護部、24a…受片、24ｂ…被覆部、
30…操作体、31…摘み部、31a…第一摘み面、31b…第二摘み面、31c…第三摘み面、32…転動部、33…軸部、w…幅、h…高さ、34…差込部、35…角部、36a…第一平面領域、36b…第二平面領域、36c…第三平面領域、
40…筆記具保持体、41…嵌合保持部、41a…軸受部、41b…係合凹部、42…締付部、42a…針保護部、42b…開孔部、43…締付ねじ、44…突起、
50…筆記具（鉛筆）、51…先端部（芯先）、
61…親指、62…人差し指、63…中指、
X…開閉方向。 10... Central leg, 11... Central script body, 11a... Thick part, 12... Needle,
20... Rotating leg 21... Rotating script body 21a... Storage part 21b... Holding part 22... Holder shaft part 23... Engagement convex part 24... Writing instrument tip protection part 24a... Receiving piece 24b... Coating part,
30... Operating body 31... Knob part 31a... First picking surface 31b... Second picking surface 31c... Third picking surface 32... Rolling part 33... Shaft part w... Width, h... Height , 34... insertion part, 35... corner part, 36a... first plane area, 36b... second plane area, 36c... third plane area,
40... Writing instrument holder, 41... Fitting and holding part, 41a... Bearing part, 41b... Engagement concave part, 42... Tightening part, 42a... Needle protection part, 42b... Opening part, 43... Tightening screw, 44... protrude,
50... Writing instrument (pencil), 51... Tip (core tip),
61...thumb, 62...index finger, 63...middle finger,
X: Open/close direction.

Claims (3)

先端に針を持つ中心脚と、筆記具を保持する筆記具保持体と、該筆記具保持体を前記中心脚周りに回転させる回転脚と、前記中心脚及び前記回転脚の基端を開閉自在に軸支する軸部と、使用者が操作する操作体と、を備えてなり、
前記操作体は、上方に位置する指腹で転動させるための転動部と、該転動部の下方に位置し、前記軸部の下方に至るまで表面を有する指先で摘むための摘み部と、を有し、
前記摘み部と前記転動部とは、横断面形状が異なる略柱体であり、下方に位置する前記摘み部が略三角柱体で上方に位置する前記転動部が略円柱形状であって両者が連続していることを特徴とするコンパス。 A central leg having a needle at its tip, a writing instrument holder that holds a writing instrument, a rotating leg that rotates the writing instrument holder around the central leg, and pivotal supports that open and close base ends of the central leg and the rotating leg. and an operating body operated by a user,
The operation body includes a rolling portion for rolling with a finger pad located above, and a grip portion located below the rolling portion and having a surface extending to the bottom of the shaft portion for picking with the fingertips. , has
The knob portion and the rolling portion are substantially cylindrical bodies having different cross-sectional shapes, and the knob portion positioned below has a substantially triangular prism shape, and the rolling portion positioned above has a substantially cylindrical shape. A compass characterized in that both are continuous . 摘み部は、第一摘み面から差込部を隔てた位置の角部から前記第一摘み面まで開閉方向に対して傾斜して略逆Ｖ字状に配設された第二摘み面及び第三摘み面と、を側面とする略角柱体からなることを特徴とする請求項１記載のコンパス。 The knob portion has a second knob surface and a second knob surface, which are arranged in a substantially inverted V shape inclined with respect to the opening/closing direction from a corner portion located across the insertion portion from the first knob surface to the first knob surface. 2. The compass according to claim 1, wherein the compass comprises a substantially prismatic body having three-knob surfaces as side surfaces . 摘み部は、親指の指先で接触するための第一平面領域を備えた第一摘み面と、人差し指の指先を接触するための第二平面領域を備えた第二摘み面と、中指の指先を接触させるための第三平面領域を備えた第三摘み面と、を有することを特徴とする請求項１又は２のいずれか一項に記載のコンパス。 The picking part has a first picking surface with a first flat area for contact with the tip of the thumb, a second picking surface with a second flat area for contact with the tip of the index finger, and a tip of the middle finger. 3. A compass according to claim 1 or 2, comprising a third picking surface with a third planar area for contact.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012162020A (en) 2011-02-08 2012-08-30 Osaka Clip:Kk Compass
JP3215557U (en) 2018-01-16 2018-03-29 秀 吉野 Compass aid

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516190Y2 (en) * 1973-12-06 1976-02-20
US5542185A (en) * 1994-04-15 1996-08-06 Fiskars Inc. Device for describing arcs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012162020A (en) 2011-02-08 2012-08-30 Osaka Clip:Kk Compass
JP3215557U (en) 2018-01-16 2018-03-29 秀 吉野 Compass aid

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