A new type of blackboard

Abstract

The invention discloses a novel blackboard, which comprises a mounting substrate, wherein a circuit board, a light emitting layer and a glass plate are fixed by the mounting substrate and a surrounding fixing frame; the light emitting layer comprises a plurality of independent light emitting inserting blocks; each light emitting inserting block comprises a square casing; the back end surface of each square casing is provided with a positive pin and a negative pin; the front end surface of each square casing is provided with a light emitting body; a plurality of pin jacks are transversely and longitudinally arranged in the circuit board; a conductive inserting pipe is arranged in each pin jack; each positive pin and each negative pin are arranged in the corresponding conductive inserting pipe, are in mutual contact, and are connected with the output end of a voltage stabilizing and rectifying circuit through welding points and conducting wires, and the input end of the voltage stabilizing and rectifying circuit is connected with a power source end through a switch, and a control circuit module adopts a Hall locking switch circuit. The novel blackboard has the advantages that the dust pollution caused by use of the traditional blackboard is avoided, and the environment of a classroom is more sanitary, the flying dust caused by erasing the blackboard is avoided, and the healthy teaching environment of teachers and students is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to a novel blackboard. Background technique [0002] Most of the common blackboards used for teaching are frosted glass or wooden block blackboards, which need to be taught with chalk writing. At the same time, there are many problems: 1. When writing with chalk, you need to wipe the blackboard, accompanied by chalk powder, which will cause dust pollution and bring harm to the health of teachers and students; 2. Due to the good permeability of the classroom, the light Sufficient, so that when some positions in the classroom look at the blackboard, there is reflection phenomenon, which affects the students' vision; 3. The existing display blackboard has cumbersome lines, complex structure, and labor-intensive consumables. Contents of the invention [0003] The purpose of the present invention is to provide a new type of blackboard, which eliminates the dust pollution ca...

AI Technical Summary

Problems solved by technology

At the same time, there are many problems: 1. When writing with chalk, you need to wipe the blackboard, accompanied by chalk powder, which will cause dust pollution and bring harm to the health of teachers and students; 2. Due to the good permeability of the classroom, the light Sufficient, so that when some positions in the classroom look at the blackboard, there is reflection phenomenon, which affects the students' vision; 3. The existing display blackboard has cumbersome lines, complex structure, and labor-intensive consumables

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