a blackboard

Abstract

The invention discloses a blackboard, the main point of which is the technical scheme including a blackboard body and a wiping part, a curtain device is arranged on the blackboard body, the curtain device includes a first slide bar and a second slide bar, and a curtain body, a curtain The main body is shrunk and placed in the first sliding rod. The first sliding rod is provided with a reset part, and the second sliding rod is provided with a fixing part. Both the first sliding rod and the second sliding rod are arranged along the longitudinal direction of the blackboard body. Extended setting and the first sliding rod and the second sliding rod are adapted to the length dimension of the blackboard body in the longitudinal direction, the blackboard body is provided with a limiting part, and both ends of the blackboard body in the lateral direction are provided with wiping parts, wiping The components include a wiping board and a driving mechanism. The blackboard body is provided with a control switch, and both the first sliding rod and the second sliding rod are provided with reverse switches. It is free and can be moved and fixed at any position on the blackboard.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, more specifically, it relates to a blackboard. Background technique [0002] The blackboard is an important tool for teaching. Teachers generally use the blackboard to write some important knowledge so that students can clearly understand and learn textbook knowledge. Teachers write from top to bottom and divide the class content from left to right. Generally, one of the areas is used to write old knowledge to pave the way for class and to consolidate knowledge for students, and the other area is used to write new knowledge to teach students to learn, and even a special area is divided for To write down the key knowledge content so that students can intuitively and clearly understand the key content of the get out of class. When wiping the blackboard after class, it is often only necessary to wipe off the old knowledge part, because the new knowledge of this class is often the old knowle...

AI Technical Summary

Problems solved by technology

[0003] Most of the current blackboards are manually wiped, which is not only time-consuming and laborious, but also the powder is flying during the artificial wiping process, which is likely to cause a certain degree of health hazards to those who wipe at close range. However, some existing blackboards with automatic wiping function cannot achieve partition wiping. It will wipe all parts of the blackboard clean, and some areas that do not want to be wiped will also be wiped off

[0004] In addition, classrooms now generally use projectors to project images onto the screen for students to watch. However, the screen is fixedly installed above one end of the blackboard in the horizontal direction. The reason for the sunlight coming in from the window next to it made the image projected by the projector blurred, which made it impossible for students sitting at the front of the classroom far away from the screen to watch normally

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