JPS6275995U

JPS6275995U -

Info

Publication number: JPS6275995U
Application number: JP11860386U
Authority: JP
Priority date: 1986-07-31
Filing date: 1986-07-31
Publication date: 1987-05-15

Description

[Brief explanation of the drawing]

第１図〜第８図は本考案の一実施例を示すもの
で、第１図は楕円コンパスの全体斜視図、第２図
は同側面図、第３図は第２図の―矢視図、第
４図は伝達手段の正面図、第５図は第４図の―
矢視図、第６図は原理を説明する平面図、第７
図および第８図は楕円の軌跡図、第９図は第２か
さ歯車を逆向きに取付けた場合の要部側面図、第
１０図は同軌跡図、第１１図は従来の楕円描写器
の平面図である。１……固定軸体、２……脚体、３……回転筒体
、９……第１アーム、１０……筆記具、１１……
移動軸体、１５……第１軸体、１７……第２軸体
、１８……保持筒体、２１……第２アーム、２３
……伝達手段、２４……第１かさ歯車、２６……
第２かさ歯車、２７……第３軸体、２８……第３
かさ歯車、２９……第１平歯車、３１……第４軸
体、３２……第４かさ歯車、３３……第２平歯車
、３５……第５軸体、３６……中間平歯車。 Figures 1 to 8 show an embodiment of the present invention. Figure 1 is a perspective view of the entire elliptical compass, Figure 2 is a side view of the same, and Figure 3 is a view taken in the direction of the - arrow in Figure 2. , Figure 4 is a front view of the transmission means, and Figure 5 is a diagram of Figure 4.
Fig. 6 is a plan view explaining the principle, Fig. 7
Figure 8 and Figure 8 are locus diagrams of the ellipse, Figure 9 is a side view of the main part when the second bevel gear is installed in the opposite direction, Figure 10 is a diagram of the same locus, and Figure 11 is a diagram of the conventional ellipse delineator. FIG. DESCRIPTION OF SYMBOLS 1... Fixed shaft body, 2... Leg body, 3... Rotating cylinder body, 9... First arm, 10... Writing instrument, 11...
Moving shaft body, 15... First shaft body, 17... Second shaft body, 18... Holding cylinder body, 21... Second arm, 23
...Transmission means, 24...First bevel gear, 26...
Second bevel gear, 27...Third shaft, 28...Third
Bevel gear, 29...first spur gear, 31...fourth shaft, 32...fourth bevel gear, 33...second spur gear, 35...fifth shaft, 36...intermediate spur gear.

Claims

[Scope of utility model registration request]

A rotary cylinder body is rotatably fitted onto a fixed shaft body having a fixing member for fixing the position at the lower end, and one end of the first arm is attached to the rotary cylinder body so as to be perpendicular to the axis of the fixed shaft body. a holding cylinder is swingably connected to the first shaft in the direction, and a holding cylinder is swingably supported at the other end of the first arm via a second shaft parallel to the first shaft; A movable shaft is held in this holding cylinder so as to be rotatable around an axis perpendicular to the axis of the second shaft, and a second arm for holding a writing instrument is attached to the lower end of the movable shaft. A transmission means is provided so as to be movable in a direction perpendicular to the body, and transmits the rotation of the rotary cylinder relative to the fixed shaft to the movable shaft at a rotation speed ratio of twice and in the opposite direction, and An elliptical compass for drafting, comprising a fixture for fixing the tilting positions of the fixed shaft and the movable shaft with respect to the first arm.