【產品中文介紹】
J3405型地球經緯儀教學模型是一款專為初高中地理教學設計的立體化教具。模型直徑32厘米，采用高精度地球橢球體比例縮放，表面清晰標注經緯線網絡、南北回歸線、極圈等地理要素，幫助學生直觀理解地球自轉與公轉原理、時區劃分及晝夜長短變化規律。
產品主體采用環保ABS工程塑料一次成型，兼顧輕量化與抗沖擊性能。球體內部設置精密軸承結構，支持360°水平旋轉與23.5°傾斜角度調節，精準模擬地球自轉軸傾角特征。啞光表面處理工藝確保地圖印刷清晰不反光，特制金屬支架底座通過三點支撐設計保證模型穩定性，滿足課堂頻繁演示需求。
本教具通過立體化展示方式突破傳統平面教學的局限：教師可通過調節球體角度演示太陽直射點移動軌跡，配合隨機附帶的可拆卸赤道平面板、地軸指示器等輔助組件，能夠開展晝夜長短計算、極晝極夜現象模擬等10余種教學實驗。經多所中學實際教學驗證，該模型可有效提升學生對地球運動、氣候分布等抽象地理概念的理解深度。
【Product Description in English】
The J3405 Earth Longitude and Latitude Demonstrator is an innovative teaching apparatus designed for secondary school geography education. Featuring a 32cm diameter precision-crafted sphere, this three-dimensional model accurately represents Earth s elliptical shape with clearly marked longitude/latitude grids, tropics, and polar circles. Its engineering-grade ABS plastic construction ensures durability for classroom use while maintaining optimal weight balance.
The core innovation lies in its dual-axis rotation system: The sphere smoothly rotates 360° on horizontal axis to demonstrate Earth s daily rotation, while the 23.5° adjustable tilt replicates axial inclination for seasonal simulations. Matte-finish surface treatment eliminates glare, ensuring clear visibility of geographical markings under various classroom lighting conditions. The reinforced tripod base provides exceptional stability during dynamic demonstrations.
This multifunctional teaching tool enables over 12 practical experiments including:
- Visualizing time zone variations through longitudinal divisions
- Demonstrating solstice/equinox positions via adjustable tilt
- Simulating polar day/night cycles using detachable illumination accessories
Educators can effectively explain complex concepts like Coriolis effect, climate zone distribution, and celestial coordinate systems through hands-on manipulation. Accompanying teaching guides suggest interactive activities that align with national curriculum standards, fostering spatial reasoning skills through tactile learning experiences.
