English teaching and learing media classroom projection screen

The utility model discloses an english teaching and learing media classroom projection screen, including curtain cloth box, curtain cloth box inner chamber lower surface is equipped with the support, the support symmetric distribution is at the both ends of curtain cloth box inner chamber lower surf...

Full description

Saved in:
Bibliographic Details
Main Authors SHI QIAN, SU LIJIE, ZHAO RUOXU
Format Patent
LanguageChinese
English
Published 12.12.2017
Subjects
ACCESSORIES THEREFOR
APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES
APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM
CINEMATOGRAPHY
ELECTROGRAPHY
HOLOGRAPHY
PHOTOGRAPHY
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:The utility model discloses an english teaching and learing media classroom projection screen, including curtain cloth box, curtain cloth box inner chamber lower surface is equipped with the support, the support symmetric distribution is at the both ends of curtain cloth box inner chamber lower surface, the support upper end is run through there is the pivot, pivot middle part cover is equipped with the spool, the gluing of spool both ends has the limiting plate, pivot right -hand member joint has transmission whirlpool tooth, transmission whirlpool tooth right -hand member meshing power whirlpool tooth, power whirlpool tooth clamps the spindle at step motor, through the limiting plate to the roll -up of curtain transversely carry on spacing, and the cooperation through pressure branch and pressure roller for can level in the time of spool roll -up curtain, lead to the card of curtain to be died because of the unevenness when avoiding the roll -up, derive the static of curtain through the brush on the help ro
Bibliography:Application Number: CN20172493185U