A portable projection screen for computer teaching
A projection screen and portable technology, applied in the field of projection screens, can solve the problems of large size, inconvenience of carrying, heavy weight and the like of the projection screen, and achieve the effect of being convenient to use and carry.
Active Publication Date: 2020-02-21
河南工学院 +1
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the structure of the projection screen remains largely unchanged
The entire projection screen is not only bulky, but also heavy and inconvenient to carry, which affects the use of the projector when changing venues
Method used
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[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0019] Such as Figure 1 to Figure 5 As shown, a portable projection screen for computer teaching includes a left vertical tube 6, a right vertical tube 9, two supporting legs for installing the left vertical tube 6 and the right vertical tube 9, and is installed on the left vertical tube 6 and the right vertical tube. The curtain 8 between the tubes 9, the upper and lower ends of the left vertical tube 6 and the right vertical tube 9 are respectively equipped...
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The invention discloses a portable projection screen for computer teaching. The portable projection screen for computer teaching includes a left vertical cylinder, a right vertical cylinder, two supporting legs, and a curtain, wherein both the upper ends and the lower ends of the left and right vertical cylinders are each correspondingly provided with an upper bearer and a lower bearer; the left vertical cylinder includes a first column which is arranged between the corresponding upper bearer and lower bearer, a first rotating shaft which is rotatably arranged on the first column, a first cylinder body which is arranged at the external part of the first rotating shaft, and a first power source which is arranged on the first cylinder body for driving the first rotating shaft to rotate; a first bar-shaped through hole for letting the curtain to penetrate is formed in the right side of the first cylinder body; a first spacing groove for clamping the end portions of the curtain is formed in the first rotating shaft; a plurality of groups of positioning grooves are formed in the front end of the first cylinder body; and each group of positioning grooves includes a first positioning groove and a second positioning groove just below the first positioning groove. The portable projection screen for computer teaching can conveniently realize usage of a projector when sites are changed and is convenient to carry, by means of coordination of each part.
Description
technical field [0001] The invention relates to a projection screen, in particular to a portable projection screen for computer teaching. Background technique [0002] At present, due to the improvement of office conditions, projectors and their supporting projection screens have been widely used in teaching. With the advancement of science and technology, projection technology has also developed rapidly, and projectors are developing in a smaller, lighter, and smarter direction. However, the construction of the projection screen remains largely unchanged. The entire projection screen is not only bulky, but also heavy and inconvenient to carry, which affects the use of the projector when changing venues. Contents of the invention [0003] The invention provides a portable projection screen for computer teaching, which can solve the above problems. [0004] A portable projection screen for computer teaching, comprising a left vertical tube, a right vertical tube, two sup...
Claims
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IPC IPC(8): G09B5/02G03B21/58
CPCG03B21/58G09B5/02
Inventor 王崇科李慧李涵张昊苏郭泽席夏青
Owner 河南工学院