JP5607983B2 - compass - Google Patents

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JP5607983B2
JP5607983B2 JP2010092950A JP2010092950A JP5607983B2 JP 5607983 B2 JP5607983 B2 JP 5607983B2 JP 2010092950 A JP2010092950 A JP 2010092950A JP 2010092950 A JP2010092950 A JP 2010092950A JP 5607983 B2 JP5607983 B2 JP 5607983B2
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leg
operating body
legs
support portion
compass
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JP2011218752A (en
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正明 佐々木
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Osaka Clip Co Ltd
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Osaka Clip Co Ltd
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Description

本発明はコンパスに関する。   The present invention relates to a compass.

一般的なコンパスは、図６のように針６が設けられる中心脚３と、鉛筆１４が設けられる回転脚４と、両脚３，４を開閉自在に連結する取付体を備え、取付体には指で摘む摘み部３８が設けられる。そして、円や円弧（以下、円等と記載する）を描く場合、例えば図６のように紙面上に開いた両脚３，４を立てて摘み部３８を指で回転させる。なお、特許文献１には取付体に操作部が設けられたコンパスが示されている。   As shown in FIG. 6, a general compass includes a central leg 3 provided with a needle 6, a rotating leg 4 provided with a pencil 14, and an attachment body that connects both legs 3 and 4 so as to be freely opened and closed. A knob 38 is provided for picking with a finger. Then, when drawing a circle or arc (hereinafter referred to as a circle or the like), for example, as shown in FIG. 6, the legs 3 and 4 opened on the paper surface are erected and the knob 38 is rotated with a finger. Patent Document 1 shows a compass in which an operation unit is provided on an attachment body.

特開平１０−１９３８７７号公報JP-A-10-193877

ところで前記円等を描く際の操作部３８の回転としては、紙面に刺した針６を中心に回転する公転（図６中矢印ａ）と、操作部３８の中心軸回りに回転する自転（図６中矢印ｂ）とがある。ここで、綺麗に円等を描くには操作部３８の公転と自転をバランス良く行う必要がある。また、操作部３８の自転の際には複数の指の間で操作部３８を転動させる必要があり、この作業は障害者や手の小さい学童にとっては難しい作業になり、また、成人や健常者にとっても製図等で多数の円等を描く場合には負担となる。特に小径の円等を描く際には、操作部３８の公転径が小さくなり、操作部３８を小さく公転させる間に操作部３８を自転させる必要があって、操作はより難しくなる。   By the way, the rotation of the operation unit 38 when drawing the circle or the like includes a revolution that rotates around the needle 6 pierced on the paper (arrow a in FIG. 6) and a rotation that rotates around the central axis of the operation unit 38 (FIG. 6 has an arrow b). Here, in order to draw a circle or the like neatly, it is necessary to perform the revolution and rotation of the operation unit 38 in a well-balanced manner. In addition, when the operation unit 38 rotates, it is necessary to roll the operation unit 38 between a plurality of fingers. This operation is difficult for a disabled person or a schoolchild with a small hand. It is a burden for a person to draw a large number of circles or the like by drafting. In particular, when drawing a small-diameter circle or the like, the revolution diameter of the operation unit 38 becomes small, and it is necessary to rotate the operation unit 38 while the operation unit 38 is revolved small, so that the operation becomes more difficult.

本発明は上記事情に鑑みてなされたものであって、簡単に円等を描くことができるコンパスを提供することを課題とする。   This invention is made | formed in view of the said situation, Comprising: It aims at providing the compass which can draw a circle etc. easily.

上記課題を解決するために本発明のコンパスは、両脚３，４が回動可能に取付けられた取付体５に縦軸回りに回転自在となる操作体２が設けられ、該操作体２の回転軸方向を可変としたことを特徴とする。このコンパスで円等を描く場合には、両脚３，４を紙面上に立てて、取付体５に設けられた操作体２を掴み、この手で平面視において操作体２を針６の先端を中心にして回転させる。すると、操作体２は取付体５に対して縦軸回りに空転しながら針６の先端を中心に回転する。このため、使用者は操作体２の軸心回りに回転する自転の際に行う動作を省略でき、容易に円等を描くことができる。なお、前記縦軸回りの「縦軸」とは鉛直方向と平行なものの他、鉛直方向に対して傾いたものも含まれる。 In order to solve the above problems, the compass of the present invention is provided with an operating body 2 that is rotatable about a vertical axis on a mounting body 5 to which both legs 3 and 4 are rotatably mounted. The axial direction is variable . When drawing a circle or the like with this compass, the legs 3 and 4 are raised on the paper surface, and the operating body 2 provided on the mounting body 5 is grasped. With this hand, the operating body 2 is held at the tip of the needle 6 in plan view. Rotate around the center. Then, the operation body 2 rotates around the tip of the needle 6 while idling around the vertical axis with respect to the attachment body 5. For this reason, the user can omit the operation | movement performed at the time of autorotation which rotates around the axial center of the operation body 2, and can draw a circle etc. easily. The “vertical axis” around the vertical axis includes not only those parallel to the vertical direction but also those inclined with respect to the vertical direction.

また、両脚３，４を回転脚４の回転方向に傾けて円等を描く際に、操作体２の軸方向ｆを鉛直方向に近づけることができ、操作体２が持ち易くなる。 Further , when the both legs 3 and 4 are tilted in the rotation direction of the rotary leg 4 to draw a circle or the like, the axial direction f of the operating body 2 can be brought closer to the vertical direction, and the operating body 2 can be easily held.

また、本発明の他のコンパスは、両脚３，４が回動可能に取付けられた取付体５に縦軸回りに回転自在となる操作体２が設けられ、該操作体２が取付体５に対して取り外し可能であり、且つ前記操作体２が一方の脚を構成する中心脚３に取付け可能であり、前記中心脚３に取り付けられた操作体２で当該中心脚３に設けられた針６が隠されるようにしたことを特徴とする。このコンパスを使用しないときには、操作体２を支持部３８から取り外して中心脚３に取り付けることで中心脚３に設けられた針６を隠すことができ、針６で怪我等することを防止できる。
また、本発明の他のコンパスは、中心脚３と、回転脚４と、前記中心脚３及び回転脚４の両脚が回動可能に取付けられた取付体５と、操作体２とを備え、前記取付体５において前記両脚３，４の回動中心よりも前記回転脚４側にずれた位置に、摘み部４０を有して前記取付体５と一体の支持部３８が立設され、該支持部３８の軸心ｅが前記両脚３，４の開閉角によらず常に前記両脚３，４の二等分線に対して平行になるものであり、前記操作体２が前記支持部３８に回転自在に支持されて前記支持部３８を中心に縦軸回りに回転自在に支持され、且つ前記操作体２が前記支持部３８に対して取り外し可能なものであることを特徴とする。このコンパスは、針６の先端を中心にして回転させる操作体２の公転の径を大きく確保できる。これにより径の小さい円等を描く際にもコンパスを容易にバランス良く起立させながらコンパスを容易に回転することができ、円等を描く作業が一層容易になる。 In another compass of the present invention, an operating body 2 that is rotatable about a vertical axis is provided on an attaching body 5 to which both legs 3 and 4 are rotatably attached. The operating body 2 is attached to the attaching body 5. The operating body 2 can be attached to a central leg 3 constituting one leg, and a needle 6 provided on the central leg 3 by the operating body 2 attached to the central leg 3. It is characterized in that is hidden. When this compass is not used, the needle 6 provided on the center leg 3 can be hidden by removing the operating body 2 from the support portion 38 and attaching it to the center leg 3, and it is possible to prevent injury by the needle 6.
Further, another compass of the present invention includes a center leg 3, a rotating leg 4, an attachment body 5 on which both the center leg 3 and the rotating leg 4 are rotatably attached, and an operating body 2. In the attachment body 5, a support portion 38 that has a knob 40 and is integrated with the attachment body 5 is provided upright at a position that is shifted to the rotation leg 4 side from the rotation center of the legs 3 and 4. The axis e of the support portion 38 is always parallel to the bisector of the legs 3 and 4 regardless of the opening / closing angle of the legs 3 and 4, and the operating body 2 is connected to the support portion 38. The operation body 2 is supported so as to be rotatable and is supported so as to be rotatable around a vertical axis around the support portion 38, and the operation body 2 is detachable from the support portion 38. This compass can secure a large diameter of revolution of the operating body 2 that rotates around the tip of the needle 6. As a result, even when drawing a circle with a small diameter, the compass can be easily rotated while standing up in a well-balanced manner, making it easier to draw a circle or the like.

本発明のコンパスは簡単に円等を描くことができる。   The compass of the present invention can easily draw a circle or the like.

本発明の実施形態のコンパスの両脚を開いた状態を示し、（ａ）は正面図であり、（ｂ）は斜視図である。The state which opened both the legs of the compass of embodiment of this invention is shown, (a) is a front view, (b) is a perspective view. 両脚を閉じた状態のコンパス本体の正面図である。It is a front view of the compass main body of the state which closed both legs. 操作体の軸方向を支持部の軸線に対して傾けた状態を示す図１のＥ−Ｅ断面図である。It is EE sectional drawing of FIG. 1 which shows the state which inclined the axial direction of the operation body with respect to the axis line of a support part. 操作体を中心脚に取り付けたコンパスの断面図である。It is sectional drawing of the compass which attached the operation body to the center leg. 本発明のコンパスの動作説明図である。It is operation | movement explanatory drawing of the compass of this invention. 従来のコンパスの動作説明図である。It is operation | movement explanatory drawing of the conventional compass.

以下、本発明を添付図面に基づいて説明する。図１乃至図５に示される本実施形態のコンパスは、コンパス本体１と、コンパス本体１に着脱自在に取り付けられる操作体２を備えている。コンパス本体１は、紙面に描く円等の中心を決める中心脚３と、前記円等を描くための筆記用具が設けられる回転脚４と、両脚３，４の端部が回動自在に取り付けられて両脚３，４を開閉可能とする取付体５とを有し、操作体２は取付体５に着脱自在に取り付けられる。なお、以下では特に記載する場合を除きコンパスの各構成部材を両脚３，４を閉じた状態について説明する。また、以下の説明では図２の矢印Ａ、Ｂ、Ｃ、Ｄに示す方向を夫々上方、下方、左方、右方として説明する。   Hereinafter, the present invention will be described with reference to the accompanying drawings. The compass of the present embodiment shown in FIGS. 1 to 5 includes a compass body 1 and an operation body 2 that is detachably attached to the compass body 1. The compass body 1 has a center leg 3 for determining the center of a circle or the like to be drawn on the paper surface, a rotating leg 4 provided with a writing tool for drawing the circle or the like, and ends of both legs 3 and 4 are rotatably attached. The operating body 2 is detachably attached to the mounting body 5. In the following description, the components of the compass will be described in a state where both legs 3 and 4 are closed unless otherwise specified. In the following description, directions indicated by arrows A, B, C, and D in FIG. 2 will be described as upper, lower, left, and right, respectively.

図１のようにコンパス本体１の左右に並ぶ中心脚３及び回転脚４は共に上下に長い棒状に形成されている。中心脚３の下端部には回転脚４側の斜め下方に向けて突出する針６が設けられ、中心脚３の針６よりも上側には回転脚４側に突出する突起７が形成されている。   As shown in FIG. 1, the central leg 3 and the rotating leg 4 arranged on the left and right sides of the compass body 1 are both formed in a bar shape that is long in the vertical direction. A needle 6 that protrudes obliquely downward on the rotating leg 4 side is provided at the lower end of the center leg 3, and a protrusion 7 that protrudes toward the rotating leg 4 is formed above the needle 6 of the center leg 3. Yes.

回転脚４の下端部には中心脚３と反対側に突出する挿通部８が形成されている。図４のように挿通部８には上下に貫通する挿通孔９が形成され、挿通孔９は下方程中心脚３側に近づくように傾斜している。   An insertion portion 8 is formed at the lower end portion of the rotating leg 4 so as to protrude to the opposite side of the central leg 3. As shown in FIG. 4, the insertion portion 8 is formed with an insertion hole 9 penetrating vertically, and the insertion hole 9 is inclined so as to approach the center leg 3 side downward.

挿通部８にはリング状の締付体１０が取り付けられている。締付体１０の内周面には雌ねじ部１２が形成されている。締付体１０は、挿通部８の外周面に形成された雄ねじ部１３に雌ねじ部１２を螺合することで回転脚４に取り付けられる。締付体１０を雌ねじ部１２の螺進方向に回転することで締付体１０を中心脚３側に移動したり、締付体１０を逆方向に回転して中心脚３から離れる方向に移動することができる。   A ring-shaped fastening body 10 is attached to the insertion portion 8. An internal thread portion 12 is formed on the inner peripheral surface of the tightening body 10. The tightening body 10 is attached to the rotating leg 4 by screwing the female screw portion 12 into the male screw portion 13 formed on the outer peripheral surface of the insertion portion 8. By rotating the tightening body 10 in the screwing direction of the female thread portion 12, the tightening body 10 is moved to the center leg 3 side, or the tightening body 10 is rotated in the opposite direction and moved away from the center leg 3. can do.

挿通孔９には筆記用具となる鉛筆１４が通される。鉛筆１４は締付体１０と回転脚４で挟持され、芯１５の先端がある下側程中心脚３側に近づくように傾斜させた状態で回転脚４に取り付けられる。   A pencil 14 serving as a writing instrument is passed through the insertion hole 9. The pencil 14 is sandwiched between the fastening body 10 and the rotating leg 4 and attached to the rotating leg 4 in a state where the lower end of the lead 15 is inclined so as to approach the central leg 3 side.

図３、図４に示されるように中心脚３及び回転脚４の夫々の上端部には取付体５に取り付けられる被取付部１６，１７が形成されている。両被取付部１６，１７には前後に貫通するねじ通し孔１８が形成されている。なお、中心脚３の被取付部１６のねじ通し孔は図示を省略する。中心脚３の被取付部１６には後方に突出するピン部１９が形成され、回転脚４の被取付部１７には前方に突出するピン部２０が形成されている。   As shown in FIGS. 3 and 4, attached portions 16 and 17 to be attached to the attachment body 5 are formed at the upper ends of the center leg 3 and the rotating leg 4. Both the attachment portions 16 and 17 are formed with screw through holes 18 penetrating in the front-rear direction. In addition, illustration of the threaded hole of the attached portion 16 of the center leg 3 is omitted. A pin portion 19 that protrudes rearward is formed on the attached portion 16 of the center leg 3, and a pin portion 20 that protrudes forward is formed on the attached portion 17 of the rotating leg 4.

中心脚３の被取付部１６は回転脚４の被取付部１７の前方に配置され、両被取付部１６，１７の間には両脚３，４を取付体５に連結する連結板２２が配置されている。連結板２２には縦長孔２３とこれと十字状に交差する横長孔２４が貫通形成されている。横長孔２４の縦長孔２３よりも右側の部分には中心脚３のピン部１９が横長孔２４の長手方向にスライド自在に挿入され、横長孔２４の縦長孔２３よりも左側部分には回転脚４のピン部２０が横長孔２４の長手方向にスライド自在に挿入されている。連結板２２の左側には上方に突出する突出部２５が形成され、突出部２５の上端部には前後に突出する被ガイド部２１が形成されている。   The attached portion 16 of the center leg 3 is disposed in front of the attached portion 17 of the rotating leg 4, and a connecting plate 22 that connects the legs 3 and 4 to the attachment body 5 is disposed between the attached portions 16 and 17. Has been. The connecting plate 22 is formed with a vertically long hole 23 and a horizontally long hole 24 intersecting with the vertically long hole 23. The pin portion 19 of the center leg 3 is slidably inserted in the longitudinal direction of the laterally long hole 24 in the portion on the right side of the longitudinally long hole 23 of the laterally elongated hole 24, and the rotating leg is disposed on the left side of the longitudinally elongated hole 23 of the laterally elongated hole 24. Four pin portions 20 are slidably inserted in the longitudinal direction of the laterally long holes 24. A protruding portion 25 that protrudes upward is formed on the left side of the connecting plate 22, and a guided portion 21 that protrudes forward and backward is formed at the upper end portion of the protruding portion 25.

取付体５には側面視で下向きに開口した略コ字状の取付部２６が形成されている。取付部２６の壁部２７，２８の間には両脚３，４の被取付部１６，１７及び連結板２２が配置されている。各被取付部１６，１７のねじ通し孔１８及び連結板２２の縦長孔２３には取付部２６の前側の壁部２７に形成した孔（図示せず）から通されたねじ３１の軸部３２が通されている。ねじ３１の軸部３２の後端部は後側の壁部２８に形成した孔（図示せず）を介して取付部２６の後方に突出し、同部にナット３４（図１（ｂ）参照）が螺合されることにより、両脚３，４及び連結板２２が取付体５に締結されている。これにより、両脚３，４は上端部がねじ３１の軸部３２で前後軸回りに軸支されて開閉可能となる。   The attachment body 5 is formed with a substantially U-shaped attachment portion 26 opened downward in a side view. Between the wall portions 27 and 28 of the mounting portion 26, the mounted portions 16 and 17 of both legs 3 and 4 and the connecting plate 22 are disposed. A shaft portion 32 of a screw 31 passed through a hole (not shown) formed in a wall portion 27 on the front side of the mounting portion 26 in the screw through hole 18 of each mounted portion 16, 17 and the vertically long hole 23 of the connecting plate 22. Is passed. The rear end portion of the shaft portion 32 of the screw 31 protrudes rearward of the mounting portion 26 through a hole (not shown) formed in the rear wall portion 28, and a nut 34 (see FIG. 1B) in the same portion. Are screwed together so that the legs 3 and 4 and the connecting plate 22 are fastened to the mounting body 5. As a result, the upper ends of the legs 3 and 4 are pivotally supported around the front and rear axes by the shaft portion 32 of the screw 31 and can be opened and closed.

取付部２６の上端部の前後両側にはガイド部３５が形成されている。各ガイド部３５は取付部２６の上端部の左右に離間した箇所から下方に突出した二条のリブ３６からなり、両リブ３６の間には下方に開口するガイド溝３７が形成されている。各ガイド部３５のガイド溝３７には連結板２２の突出部２５の被ガイド部２１が上下方向に摺動可能に挿入されている。   Guide portions 35 are formed on both front and rear sides of the upper end portion of the attachment portion 26. Each guide part 35 is composed of two ribs 36 protruding downward from the left and right portions of the upper end of the attachment part 26, and a guide groove 37 that opens downward is formed between the ribs 36. The guided portion 21 of the protruding portion 25 of the connecting plate 22 is inserted into the guide groove 37 of each guide portion 35 so as to be slidable in the vertical direction.

取付部２６の上端部左側には操作体２を縦軸回りに回転自在に軸支する支持部３８が立設されている。支持部３８は取付部２６と一体で且つ軸心ｅが中心脚３の長手方向（すなわち鉛直方向）と略平行になっている。支持部３８は正面視で脚３，４の回動中心となるねじ３１の軸心ｏよりも回転脚４側の側方（左側）にずれた位置に配置されている。具体的には軸心ｅは軸心ｏよりも左側に８ｍｍずれている。また、支持部３８の軸心ｅは前後方向においては両脚３，４と同位置に配置されている。   On the left side of the upper end portion of the attachment portion 26, a support portion 38 is erected so as to pivotally support the operation body 2 around the vertical axis. The support portion 38 is integral with the mounting portion 26, and the axis e is substantially parallel to the longitudinal direction (that is, the vertical direction) of the center leg 3. The support portion 38 is disposed at a position shifted to the side (left side) on the rotating leg 4 side with respect to the axis o of the screw 31 that is the rotation center of the legs 3 and 4 in a front view. Specifically, the axis e is shifted 8 mm to the left from the axis o. The axis e of the support portion 38 is disposed at the same position as the legs 3 and 4 in the front-rear direction.

両脚３，４を開閉するにあたって脚３，４がねじ３１の軸部３２を中心に回動されたときには、脚３、４に設けられたピン部１９，２０は、常に両脚３，４の開閉角αの二等分線ｄを中心とした線対称位置に配置される。このため、連結板２２は両脚３、４の開閉角αの二等分線と平行に移動し、連結板２２に対して突出部２５及びガイド部３５を介して上下に移動自在に連結された取付体５は支持部３８の軸心ｅを二等分線ｄに対して平行にしたたまま脚３、４に対して回動することとなる。従って紙面に円等を描くときには、両脚３，４の開閉角αに関わらず支持部３８の軸心ｅが常に紙面に対して略垂直な状態に保たれる。   When the legs 3 and 4 are rotated around the shaft 32 of the screw 31 when opening and closing the legs 3 and 4, the pin portions 19 and 20 provided on the legs 3 and 4 always open and close the legs 3 and 4. Arranged at a line-symmetrical position about the bisector d of the angle α. For this reason, the connecting plate 22 moves in parallel with the bisector of the opening / closing angle α of both the legs 3 and 4 and is connected to the connecting plate 22 so as to be movable up and down via the protruding portion 25 and the guide portion 35. The mounting body 5 rotates with respect to the legs 3 and 4 while keeping the axis e of the support portion 38 parallel to the bisector d. Accordingly, when a circle or the like is drawn on the paper surface, the axis e of the support portion 38 is always kept substantially perpendicular to the paper surface regardless of the opening / closing angle α of the legs 3 and 4.

支持部３８の下端部には他部よりも小径となったくびれ部３９が形成されている。支持部３８のくびれ部３９よりも上方の部分は摘み部４０を構成している。摘み部４０は上方程先が細くなるように形成され、摘み部４０の下端部は他部よりも膨大した膨大部４４となっている。   A constricted portion 39 having a smaller diameter than the other portions is formed at the lower end portion of the support portion 38. A portion above the constricted portion 39 of the support portion 38 constitutes a knob portion 40. The knob portion 40 is formed so that the tip is thinner toward the upper side, and the lower end portion of the knob portion 40 is an enormous portion 44 that is larger than the other portions.

図３に示すように操作体２は上端を閉塞した略縦筒状、すなわち縦長のキャップ状に形成されている。操作体２は内部に下方に開口する収納部４１が形成され、収納部４１に支持部３８を収納した状態で支持部３８に回転自在に取り付けられる。   As shown in FIG. 3, the operating body 2 is formed in a substantially vertical cylindrical shape with its upper end closed, that is, a vertically long cap shape. The operation body 2 has a storage portion 41 that opens downward, and is rotatably attached to the support portion 38 with the support portion 38 stored in the storage portion 41.

操作体２の主部は硬質樹脂からなるが、下部の外周面は滑りにくい軟質樹脂からなる滑り止め部３３で構成されている。これにより操作体２を掴んだ手が滑り難くなる。   The main part of the operating body 2 is made of a hard resin, but the outer peripheral surface of the lower part is composed of a non-slip part 33 made of a soft resin that is hard to slip. This makes it difficult for the hand holding the operating body 2 to slip.

操作体２の収納部４１の下端部内周面には内方に突出する抜止部４３が周方向に亘って形成されている。抜止部４３は主部よりも表面滑性の高いエンジニアリングプラスチックからなる。抜止部４３の内径は摘み部４０の膨大部４４の外径よりもわずかに小さく且つくびれ部３９の外径よりも大きくなっている。また、抜止部４３の上下長さはくびれ部３９の上下長さよりも短くなっている。   A retaining portion 43 that protrudes inward is formed on the inner peripheral surface of the lower end portion of the storage portion 41 of the operating body 2 in the circumferential direction. The retaining portion 43 is made of an engineering plastic having a surface slipperiness higher than that of the main portion. The inner diameter of the retaining portion 43 is slightly smaller than the outer diameter of the enlarged portion 44 of the knob 40 and larger than the outer diameter of the constricted portion 39. Further, the vertical length of the retaining portion 43 is shorter than the vertical length of the constricted portion 39.

操作体２を支持部３８に取り付けるには、支持部３８を抜止部４３の内側を通して収納部４１に挿入する。すると、膨大部４４は抜止部４３を変形させながら抜止部４３を乗り越え、抜止部４３がくびれ部３９に遊嵌される。このように支持部３８に操作体２を取り付けた状態では、膨大部４４が抜止部４３の上側に位置して操作体２から支持部３８が抜け出ることが防止される。抜止部４３はくびれ部３９の周囲を回転自在であり、これにより操作体２は支持部３８を中心に縦軸回りに回転自在となる。抜止部４３はくびれ部３９に遊嵌されることに加えて滑性の高い材料からなるので、操作体２を支持部３８に対してほとんど抵抗なく回転させることができる。また、抜止部４３はくびれ部３９に遊嵌されることに加えてくびれ部３９に対して若干量上下動できるようになっているので、操作体２の軸方向ｆの支持部３８に対する角度βは支持部３８の軸心ｅと平行な状態から所定の範囲内で変更できるようになっており、またこの操作体２の軸方向ｆは支持部３８の周方向におけるいずれの方向にも所定範囲内で傾けられるようになっている。角度βの上限は図３のように支持部３８が収納部４１の内面に当たる位置を調整することで決定される。具体的に角度βの上限は１０〜４５度が好ましく、本実施形態では支持部３８の軸心ｅと平行な状態から最大限１０度傾けられるようになっている。   In order to attach the operating body 2 to the support portion 38, the support portion 38 is inserted into the storage portion 41 through the inside of the retaining portion 43. Then, the enormous portion 44 gets over the retaining portion 43 while deforming the retaining portion 43, and the retaining portion 43 is loosely fitted to the constricted portion 39. Thus, in the state where the operating body 2 is attached to the support portion 38, the enormous portion 44 is positioned above the retaining portion 43, and the support portion 38 is prevented from coming out of the operating body 2. The retaining portion 43 is rotatable around the constricted portion 39, whereby the operation body 2 is rotatable about the vertical axis around the support portion 38. Since the retaining portion 43 is made of a highly slippery material in addition to being loosely fitted to the constricted portion 39, the operation body 2 can be rotated with little resistance with respect to the support portion 38. Further, since the retaining portion 43 can be slightly moved up and down with respect to the constricted portion 39 in addition to being loosely fitted to the constricted portion 39, the angle β of the operating body 2 with respect to the support portion 38 in the axial direction f. Can be changed within a predetermined range from a state parallel to the axis e of the support portion 38, and the axial direction f of the operating body 2 is in a predetermined range in any direction in the circumferential direction of the support portion 38. It can be tilted inside. The upper limit of the angle β is determined by adjusting the position where the support portion 38 hits the inner surface of the storage portion 41 as shown in FIG. Specifically, the upper limit of the angle β is preferably 10 to 45 degrees, and in the present embodiment, the angle β is inclined at a maximum of 10 degrees from a state parallel to the axis e of the support portion 38.

前記操作体２が支持部３８に取り付けられたコンパスを用いて紙面に円等を描くには、例えば以下のように行う。まず、一般的なコンパスと同様に、針６の先端から鉛筆１４の芯１５の先端までの距離が紙面に描く予定の円等の半径になるよう両脚３，４の開閉角αを調整し、この後、針６の先端を紙面に刺すと共に鉛筆１４の芯１５を紙面上に載せる。次に操作体２を握る又は手が大きい場合には指で摘まみ、この後、前記操作体２を持った手で図５に示すように平面視において操作体２を針６の先端を中心にして回転させる。このようにすると、支持部３８に軸支された操作体２は支持部３８に対して空転しながら、前記針６の先端を中心にした回転、すなわち公転が行われることになる。換言すれば、操作体２は平面視で前記公転の軌跡に沿って回転する。このため、前記操作体２の軸心回りの回転である自転に伴い指で操作体２を転動させる動作を省略でき、障害者や手の小さい学童も容易に円等を描くことができる。   In order to draw a circle or the like on the paper surface using the compass attached to the support unit 38, the operation body 2 is performed as follows, for example. First, as with a general compass, the opening / closing angle α of both legs 3 and 4 is adjusted so that the distance from the tip of the needle 6 to the tip of the core 15 of the pencil 14 is a radius such as a circle to be drawn on the paper, Thereafter, the tip of the needle 6 is stabbed into the paper and the core 15 of the pencil 14 is placed on the paper. Next, grasp the operating body 2 or pick it with a finger when the hand is large, and then hold the operating body 2 with the hand holding the operating body 2 in the plan view as shown in FIG. And rotate. If it does in this way, the operation body 2 pivotally supported by the support part 38 will rotate around the front-end | tip of the said needle | hook 6, ie, revolution, while idling with respect to the support part 38. FIG. In other words, the operating body 2 rotates along the trajectory of revolution in plan view. For this reason, the operation | movement which rolls the operation body 2 with a finger | toe with the autorotation which is the rotation of the said operation body 2 around an axis center can be abbreviate | omitted, and a disabled person and a small schoolchild can also draw a circle etc. easily.

ところで、紙面に円等を描く際、両脚３，４を紙面に対して垂直に起立させるのではなく図３に示すように両脚３，４を回転脚４の回転方向にやや傾けた状態にすると、回転脚４をスムーズに回転させることができる。ここで、仮に操作体２の軸方向ｆが支持部３８の軸心ｅと平行に固定された状態にあると、操作体２の軸方向ｆが傾けた両脚３，４と平行になって鉛直方向に対して傾くこととなり、円等を描く際に操作体２が持ち難くなる。しかし、本実施形態では操作体２の軸方向ｆの支持部３８に対する角度βを変更できるようにしているので、図３のように前記両脚３，４を傾けて円等を描く際に操作体２の軸方向ｆを回転脚４の回転方向と反対側に傾けて紙面に対して略垂直にし、この状態で操作体２を支持部３８回りに回転させることができる。従って、操作体２が持ち易く、一層容易に円等を描くことができる。なお、図３では回転脚４を時計回りに回転させて円等を描く際に操作体２を傾けた状態を示しており、両脚３，４を左側に、操作体２を右側に傾けているが、回転脚４を反時計回りに回転させる際には、両脚３，４を右側に、操作体２を左側に傾けた状態とするのが好ましいことは言うまでもない。   By the way, when drawing a circle or the like on the paper surface, if the legs 3 and 4 are slightly tilted in the rotational direction of the rotary leg 4 as shown in FIG. The rotating leg 4 can be smoothly rotated. Here, if the axial direction f of the operating body 2 is fixed in parallel with the axis e of the support portion 38, the axial direction f of the operating body 2 is parallel to the inclined legs 3 and 4 and is vertical. The operation body 2 is difficult to hold when drawing a circle or the like. However, in the present embodiment, the angle β with respect to the support portion 38 in the axial direction f of the operating body 2 can be changed. Therefore, when the both legs 3 and 4 are tilted to draw a circle or the like as shown in FIG. In this state, the operating body 2 can be rotated around the support portion 38 by inclining the axial direction f of 2 to the opposite side of the rotation direction of the rotary leg 4 so as to be substantially perpendicular to the paper surface. Therefore, the operation body 2 is easy to hold and a circle or the like can be drawn more easily. 3 shows a state in which the operating body 2 is tilted when the rotating leg 4 is rotated clockwise to draw a circle or the like, and both the legs 3 and 4 are tilted to the left and the operating body 2 is tilted to the right. However, when rotating the rotating leg 4 counterclockwise, it is needless to say that it is preferable to tilt both the legs 3 and 4 to the right and the operating body 2 to the left.

また、特に径の小さい円等を描く際には前記操作体２の針６の先端を中心にした公転の径が小さくなり、両脚３，４の開閉角αが小さくなることも相まってコンパスを紙面上にバランス良く起立させることが難しくなる。しかし、本実施形態では支持部３８を脚３，４の回動中心よりも回転脚４側に配置しているので、前記操作体２の公転径を大きく確保することができる。従って径の小さい円等を描く際にもコンパス本体１を容易にバランス良く起立させることができ、円等を描く作業が一層容易になる。   In particular, when drawing a circle having a small diameter, the diameter of revolution around the tip of the needle 6 of the operating body 2 is reduced, and the opening / closing angle α of both legs 3 and 4 is also reduced. It becomes difficult to stand up in a balanced manner. However, in this embodiment, since the support portion 38 is disposed on the rotating leg 4 side with respect to the rotation center of the legs 3, 4, a large revolution diameter of the operating body 2 can be ensured. Therefore, the compass body 1 can be easily erected in a well-balanced manner when drawing a circle having a small diameter, and the work of drawing a circle or the like is further facilitated.

操作体２はある程度の力を入れて支持部３８から操作体２を引き抜けば、支持部３８から操作体２を取り外すことができる。そして、この操作体２を取り外した状態では支持部３８の摘み部４０を指で摘んで従来のコンパスと同様に円等を描くこともできる。   The operating body 2 can be removed from the support portion 38 by applying a certain amount of force and pulling the operating body 2 out of the support portion 38. And in the state which removed this operation body 2, the knob | pick part 40 of the support part 38 can be picked with a finger | toe, and a circle etc. can be drawn similarly to the conventional compass.

前記支持部３８から取り外した操作体２は図４のように中心脚３を抜止部４３の内側を通して収納部４１に挿入し、抜止部４３に突起７を係合させることで中心脚３に対して着脱自在に取り付けることができる。このように操作体２を上下逆にして中心脚３に取付けた状態では、中心脚３に設けられた針６が収納部４１に収納され、操作体２の周壁部及び上端部で隠される。このためコンパスを使用しないときに中心脚３に操作体２を取り付ければ、操作体２で針６を覆い、針６で怪我等することを防止できる。   As shown in FIG. 4, the operating body 2 removed from the support portion 38 is inserted into the storage portion 41 through the inside of the retaining portion 43 and the projection 7 is engaged with the retaining portion 43 so that the center leg 3 is engaged with the central leg 3. Can be attached detachably. Thus, in a state where the operation body 2 is turned upside down and attached to the center leg 3, the needle 6 provided on the center leg 3 is housed in the housing portion 41 and hidden by the peripheral wall portion and the upper end portion of the operation body 2. Therefore, if the operating body 2 is attached to the central leg 3 when the compass is not used, the operating body 2 can cover the needle 6 and prevent the needle 6 from being injured.

本実施形態のコンパスは回転脚４に鉛筆１４を設けたが、回転脚４には鉛筆１４に代えてシャープペンシル等のその他の筆記用具や鉛芯等を設けてもよい。また、支持部３８は取付体５から上方に突出した柱状のもので構成したが、ボールジョイントで構成しても構わない。また、支持部３８は脚３，４の回動中心よりも回転脚４側にずれた位置に立設したが、左右方向において脚３，４の回動中心と同じ位置に立設してもよい。また、支持部３８は取付体５と一体に形成したが、支持部３８の下端部を左右軸回りに回動自在に取付体５に連結し、支持部３８の軸方向ｅを変更できるようにしても構わない。このようにすると、両脚３，４を図３の状態よりもさらに角度をつけて傾けて円等を描きたいときに、支持部３８を手で左右軸回りに回動して軸心ｅを回転脚４の回転方向と反対側に傾けることで、操作体２の軸方向ｆを紙面に対して略垂直にできて有効である。また、本実施形態の操作体２はキャップ状としたが、これに限定されるものではなく、例えば上下に開口した筒状に形成してもよい。また、この他、本発明の主旨を逸脱しない範囲において適宜設計変更可能である。   In the compass of this embodiment, the pencil 14 is provided on the rotating leg 4, but other writing tools such as a mechanical pencil, a lead core, and the like may be provided on the rotating leg 4 in place of the pencil 14. Moreover, although the support part 38 was comprised with the columnar thing protruded upwards from the attachment body 5, you may comprise with a ball joint. Further, although the support portion 38 is erected at a position shifted from the rotation center of the legs 3 and 4 to the rotation leg 4 side, it may be erected at the same position as the rotation center of the legs 3 and 4 in the left-right direction. Good. Further, although the support portion 38 is formed integrally with the attachment body 5, the lower end portion of the support portion 38 is connected to the attachment body 5 so as to be rotatable about the left and right axis so that the axial direction e of the support portion 38 can be changed. It doesn't matter. In this way, when the legs 3 and 4 are inclined at a further angle than the state of FIG. 3 and a circle or the like is to be drawn, the support portion 38 is rotated by hand around the left and right axis to rotate the axis e. By tilting the leg 4 in the direction opposite to the rotation direction, the axial direction f of the operating body 2 can be made substantially perpendicular to the paper surface, which is effective. Moreover, although the operating body 2 of this embodiment was made into the cap shape, it is not limited to this, For example, you may form in the cylinder shape opened up and down. In addition, the design can be changed as appropriate without departing from the gist of the present invention.

２ 操作体
３ 中心脚
４ 回転脚
５ 取付体
６ 針
３８ 支持部 2 Operating body 3 Central leg 4 Rotating leg 5 Mounting body 6 Needle 38 Support part

Claims (3)

両脚が回動可能に取付けられた取付体に縦軸回りに回転自在となる操作体が設けられ、該操作体の回転軸方向を可変としたことを特徴とするコンパス。 A compass characterized in that an operating body that is rotatable about a vertical axis is provided on a mounting body in which both legs are rotatably mounted , and the rotational axis direction of the operating body is variable . 両脚が回動可能に取付けられた取付体に縦軸回りに回転自在となる操作体が設けられ、該操作体が取付体に対して取り外し可能であり、且つ前記操作体が一方の脚を構成する中心脚に取付け可能であり、前記中心脚に取り付けられた操作体で当該中心脚に設けられた針が隠されるようにしたことを特徴とするコンパス。 An operating body that is rotatable about a vertical axis is provided on a mounting body in which both legs are rotatably mounted, the operating body is removable from the mounting body, and the operating body constitutes one leg. A compass that can be attached to a central leg, and a needle provided on the central leg is hidden by an operating body attached to the central leg . 中心脚と、回転脚と、前記中心脚及び回転脚の両脚が回動可能に取付けられた取付体と、操作体とを備え、前記取付体において前記両脚の回動中心よりも前記回転脚側にずれた位置に、摘み部を有して前記取付体と一体の支持部が立設され、該支持部の軸心が前記両脚の開閉角によらず常に前記両脚の二等分線に対して平行になるものであり、前記操作体が前記支持部に回転自在に支持されて前記支持部を中心に縦軸回りに回転自在に支持され、且つ前記操作体が前記支持部に対して取り外し可能なものであることを特徴とするコンパス。 A center leg, a rotating leg, a mounting body on which both the center leg and the rotating leg are rotatably mounted, and an operating body, wherein the mounting body is closer to the rotating leg than the center of rotation of the both legs. A support portion integral with the mounting body is provided at a position shifted to the position, and the axis of the support portion is always relative to the bisector of the both legs regardless of the opening / closing angle of the both legs. The operating body is rotatably supported by the support portion, and is supported rotatably about a vertical axis around the support portion, and the operating body is detached from the support portion. Compass characterized by being possible .
JP2010092950A 2010-04-14 2010-04-14 compass Active JP5607983B2 (en)

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JP5620842B2 (en) * 2011-02-08 2014-11-05 株式会社大阪クリップ compass
EP3815925A1 (en) 2019-11-01 2021-05-05 Sdi Corporation Drawing compass

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