Projection soft curtain device and soft electronic whiteboard system including the projection soft curtain device

Abstract

The invention provides a soft projection curtain device comprising a soft curtain and a base plate. The soft curtain is arranged at the front end of the base plate, a fixed rod is arranged at one end of the soft curtain, and a reel rolling the soft curtain is arranged at the other end of the soft curtain; two ends of the fixed rod are respectively fixedly arranged on two sides of the base plate; a driving motor is arranged at one end of the reel, and a slider device which does not rotate relative to the driving motor is arranged at each of two ends of the reel. Meanwhile, the invention provides a soft electronic whiteboard system comprising the soft protection curtain device. On the premise of not modifying any existing equipment, an electronic whiteboard is used, great resource waste is not caused, and great money, labor and material resources are saved on the premise of realizing same effect.

Description

technical field [0001] The invention relates to an electronic whiteboard system and a projection device thereof, in particular to a soft electronic whiteboard system and a projection soft curtain device included therein, and belongs to the technical field of electronic whiteboards. Background technique [0002] The so-called soft electronic whiteboard is to combine the function of a soft curtain that can reflect the content of the projected screen with a hard board (such as a steel green board for schools, a steel blackboard, a whiteboard that can be written with a water-based pen, etc., hereinafter collectively referred to as the substrate) to facilitate photoelectricity. The function of pen writing is organically combined to form an electronic whiteboard system that is convenient for projection and photoelectric pen writing. When in use, just unfold the soft curtain and absorb the curtain on the substrate through the adsorption principle of the magnetic material on the bac...

AI Technical Summary

Problems solved by technology

In this way, the operation is very complicated

[0006] The third is the electric screen method: the electric screen is used on the basis of the second method, but when the screen is automatically lowered, because of the principle of magnetic attraction, the screen will be adsorbed on the board, and the screen cannot be lowered smoothly, and human assistance is required Pull it out; when the screen needs to be rolled in after use, it is necessary to manually unravel the screen and the substrate before pulling it up electrically. Although the electric power is increased, the effect is not great

According to the common practice of people using electric curtains, they will directly operate the curtain up or curtain down buttons on the curtain control box. When the curtain is lowered, because of the magnetic adsorption principle between the magnetism on the back of the curtain and the substrate, the curtain will be absorbed at the beginning of lowering. It cannot be done at all; similarly, when the curtain has not been completely lifted from the hard plate, if the curtain up button is directly operated, due to the strong force of adsorption, the motor cannot roll the curtain into the curtain compartment, which will cause the motor to continue to work and heat up , burned, and more seriously, safety accidents such as motor fires will occur

[0007] The fourth is the two-dimensional electric control method: on the basis of the third method, an electric translation mechanism is added, specifically: a horizontal electric displacement mechanism is added at the fixed end of the curtain storage bin. When in use, the curtain translation mechanism will first move away from Move a certain distance in the direction of the whiteboard, and then lower the curtain. When the curtain is lowered to the bottom, the curtain will move towards the direction close to the substrate. When the curtain tends to approach the steel substrate, the magnetic material on the back of the curtain will be adsorbed on the substrate ; However, when the use is over, the curtain translation mechanism will first move away from the substrate. At this time, although the curtain will be uncovered from the curtain, the distance of uncovering is very limited, and the height of the curtain is basically about one meter. If If you want the screen to be completely separated from the substrate, the distance to move horizontally must reach at least two-thirds of the height of the screen, because if you move the screen along the direction of the substrate, the magnetic effect is very strong, and the size of the screen adsorbed on the whiteboard is very long. The action of peeling off the curtain cannot be completed automatically, and human participation is still required, and there is no way to achieve automation; at the same time, the phenomenon of burning the motor similar to the third case will also occur

And in the process of lowering the curtain, if the horizontal movement of the curtain is not stable or balanced, the absorption of the curtain will be very uneven, or even the adsorption will be misplaced. If the misalignment is corrected, it will be laborious and troublesome

[0008] None of the above implementation methods can fundamentally solve the problems of the flexible electronic whiteboard retractable and electric automatic lifting

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