Device for automatically cleaning surface of projection cloth when projection cloth is used

Abstract

The invention relates to the technical field of multimedia, and discloses a device for automatically cleaning the surface of projection cloth when the projection cloth is used. The device comprises a shell, wherein a rotating disc is movably connected in the shell; the left end of the rotating disc is movably connected with a moving rod; the outer surface of the rotating disc is movably connected with a belt; and the upper end of the rotating disc is movably connected with a pressure block. When the projection cloth falls to the bottommost end, the pressure borne by a piezoelectric board reaches the maximum, so that the magnetic field of an electromagnet reaches the maximum, the thrust on a pushing mechanism is enough to push a time delay mechanism away, the time delay mechanism moves upwards, the pushing mechanism moves rightwards, the rightward thrust is applied to a reset spring, the inner portion of the reset spring is compressed by stress, elastic potential energy is gathered in the reset spring, preparation is made for resetting of the pushing mechanism, meanwhile, when the pushing mechanism moves rightwards, a clamping mechanism is driven to limit the lower end of the projection cloth, and therefore the effect of preventing the projection cloth from moving all around under the influence of the external environment is achieved.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a device for automatically cleaning the surface of a projection cloth when the projection cloth is used. Background technique [0002] With the gradual development of society, people's living standards have been significantly improved, which has gradually increased the acceptance of new things by modern people. Among them, multimedia technology is modern technology, and multimedia technology can be said to be a typical representative product in the information age. Initially, multimedia technology It was developed in the military field, and the military purpose is realized through multimedia joint display, and now it is also used for civilian use. [0003] But at present, there are still defects that need to be overcome in the use of multimedia projection cloth. When the projection cloth is in use, sometimes there is a sudden strong wind outdoors, which easily blows the proje...

AI Technical Summary

Problems solved by technology

[0003] But at present, there are still defects that need to be overcome in the use of multimedia projection cloth. When the projection cloth is in use, sometimes there is a sudden strong wind outdoors, which easily blows the projection cloth, thereby making the projection interface blurred and affecting viewing. At the same time, the wind is too strong. It is also easy to cause the projection cloth to tear, and at the same time, it is rolled up during the projection. Due to the uneven surface of the projection cloth, it is easy to deposit dust. Too much dust is easy to cause interference to the large beam of the projector. Therefore, when using the projection cloth, it will automatically A device for cleaning the surface of the projection cloth came into being

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