| 摘要 |
PURPOSE: A celestial sphere for education is provided to improve the efficiency of teaching by revolving a globe, which is rotated, along the ecliptic plane and revolving a moon model around the globe. CONSTITUTION: A rotating device(30) comprises a base(32) coupled with a link pipe(28) connected to a fixed pipe(25) of a revolving device(20) and a rotary bevel gear with a linked bevel gear(29) of a drive shaft passing through the link pipe. The rotating device vertically hinges the gear axis of the rotary bevel gear to the base to constitute first and second pinions. The first pinion interlocks with a rotation shaft via a speed reduction pinion. A rotating case(40) is rotated around the rotation shaft. |
