Projection screen used for multimedia teaching and with dust removal effect

A technology of multimedia teaching and projection screen, applied in the field of projection screen with dust removal effect used in multimedia teaching, can solve the problems of reducing the quality of teaching, the projection screen cannot be dust-removed, etc., and achieves the effect of easy recovery and release

Inactive Publication Date: 2018-04-17
CHANGZHOU COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a projection screen with dust removal effect for multimedia teaching, which solves the problem that the projection screen cannot perform dust removal and reduces the quality of teaching

Method used

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  • Projection screen used for multimedia teaching and with dust removal effect
  • Projection screen used for multimedia teaching and with dust removal effect
  • Projection screen used for multimedia teaching and with dust removal effect

Examples

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Embodiment Construction

[0023] The materials, methods and instruments used in the following examples, unless otherwise specified, are conventional materials, methods and instruments in the art, and those of ordinary skill in the art can obtain them through commercial channels.

[0024] In the following description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer" and "vertical" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and thus should not be construed as limiting the invention.

[0...

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Abstract

The invention discloses a projection screen used for multimedia teaching and with a dust removal effect, and relates to the technical field of a projection screen. The projection screen used for multimedia teaching and with the dust removal effect comprises a shell; two baffles are fixedly connected with the two ends of the shell and in an inner cavity of the shell; two bearings are embedded in the centers of the two baffles; a first fixed box is connected with the left side surface of the shell and positioned on the left side of the baffles; a motor is fixedly mounted in an inner cavity of the first fixed box; and the tail end of the output shaft of the motor is fixedly connected with a rotary rod through a coupling. By adoption of the projection screen used for multimedia teaching and with the dust removal effect, air exhausting and dust removal can be performed in curtain retracting by starting an exhaust fan; through air holes, dust can be conveyed to a dust collection box finally;through an electric push rod, the dust collection box can be conveyed from the upper part to the lower part, so that internal dust of the dust collection box can be cleaned regularly by an operator conveniently; and meanwhile, by virtue of dust removal of the projection curtain, the multimedia teaching quality is improved.

Description

technical field [0001] The invention relates to the technical field of projection screens, in particular to a projection screen with dust removal effect for multimedia teaching. Background technique [0002] The projection screen is one of the most commonly used products in the peripheral equipment of the projector. The projection screen is the abbreviation of the projection screen; if the projection screen is properly matched with the projector, high-quality projection effects can be obtained. [0003] At present, multimedia teaching often uses projectors and projection screens. Commonly used projection screens are fixed on walls or blackboards. After many uses of today’s projection screens, the surface of the screen will be covered with dust, and dust will accumulate for a long time. It will affect the clarity of screen projection, which will affect the quality of teaching, so a projection screen with dust removal effect is needed to increase the quality of multimedia teac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/58B08B5/04
CPCB08B5/04G03B21/58
Inventor 崔毓娟
Owner CHANGZHOU COLLEGE OF INFORMATION TECH
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