Blackboard is used in high flexibility of low pollution teaching

The utility model discloses a blackboard is used in high flexibility of low pollution teaching, including blackboard body, blackboard body integral erection is on the track of both sides, and blackboard body can follow the track and slide, the track rigid coupling is on the wall, blackboard body's bottom both sides branch is equipped with a first hole groove, stretches into the head by the screw rod of motor drive rotation in every first hole groove, the screw rod passes the thread bush of rigid coupling on the wall, and the external screw thread of screw rod uses with the interior screw -thread fit of thread bush, blackboard body's top both sides branch is equipped with a second hole groove, and second hole inslot is provided with compression spring, compression spring's the one end and the mount rigid coupling of blackboard body top, the bottom rigid coupling in the other end and second hole groove. 本实用新型公开了种低污染高灵活性教学用黑板，包括黑板本体，黑板本体整体安装在两侧的轨道上，黑板本体可沿轨道滑动，所述轨道固接在墙面上；黑板本体的底部两侧分设有个第孔槽，每个第孔槽中伸入由电机驱动旋转的螺杆的头部，所述螺