Telescopic frame type projection device for teaching

A telescopic frame type projection device for teaching is characterized in that universal wheels with brakes are arranged at the bottom of a main structure frame, four same telescopic supporting columns are arranged at the top of the main structure frame, electric push rods are arranged in the middl...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	LI PENG, WU ZHENQIANG, WANG TAO, MA JUNLIANG, HU XIMING, WANG LIANG, LIAO XUENING
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ACCESSORIES THEREFOR ADVERTISING APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CINEMATOGRAPHY CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES ELECTROGRAPHY GLOBES HOLOGRAPHY PHOTOGRAPHY PHYSICS PLANETARIA SEALS
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Beschreibung
Zusammenfassung:	A telescopic frame type projection device for teaching is characterized in that universal wheels with brakes are arranged at the bottom of a main structure frame, four same telescopic supporting columns are arranged at the top of the main structure frame, electric push rods are arranged in the middles of two transverse rods in the width direction of the left side and the right side of the top of the main structure frame, and first connecting rods are arranged at the power ends of the electric push rods; the tops of the movable rods of the two telescopic supporting columns in the width direction on the same side are connected through a second connecting rod, and the tops of the movable rods of the two telescopic supporting columns in the length direction on the rear side of the main structure frame are connected through a third connecting rod. A lower curtain mounting groove is fixedly formed in the top of the front side of the main structure frame in the length direction, an upper curtain mounting groove is f