CN202156181U

CN202156181U - Automatic attaching sheet having writing and projecting functions for teaching

Info

Publication number: CN202156181U
Application number: CN 201120228402
Authority: CN
Inventors: 洪惠泰
Original assignee: EVEREST PHOTOELECTRIC (WUXI) Co Ltd
Current assignee: EVEREST PHOTOELECTRIC (WUXI) Co Ltd
Priority date: 2011-06-22
Filing date: 2011-06-22
Publication date: 2012-03-07
Anticipated expiration: 2021-06-22

Abstract

The utility model relates to an automatic attaching sheet having writing and projecting functions for teaching, which comprises a thin magnetized steel sheet and a grey coating, wherein the grey coating is coated on the surface of the thin magnetized steel sheet; the thin magnetized steel sheet is flatly attached on the traditional blackboard or the white board by the magnetic absorption principle; the grey coating is coated on the surface of the thin magnetized steel sheet in the automatic attaching sheet having writing and projecting functions for teaching, which can properly reduce the luminance but increase the projection contrast ratio; the thin magnetized steel sheet is flatly attached on the traditional blackboard or the white board by the magnetic absorption principle, which can reach the dual purposes of chalk writing and wiping as well as projection recognition; the projection ray is projected on the thin magnetized steel sheet under the equidistantly imaging principle so as to shorten the distance between the projector and the blackboard and increase the height from the projection ray to the ground; therefore, the ray cannot be easily blocked by teacher, which is convenient for teaching. The projection function is added without completely changing the teaching habits of teacher; and teacher can directly annotate and explain the projected content.

Description

A kind of having concurrently write and the teaching of the projecting function thin plate of fitting automatically

Technical field

The utility model relates to a kind of teaching and uses blackboard, particularly relate to a kind of can be smooth in the plane of any magnetic conduction, comprise traditional teaching with on the blackboard, have concurrently and write and the teaching of the projecting function thin plate of fitting automatically.

Background technology

In teaching at present, use blackboard or blank to use usually as protecting teaching writing board, its major function is to utilize chalk or lettering pen writing words or image, as blackboard eraser capable of using is erased when making amendment; But in recent years along with the use of projecting apparatus in teaching; Mainly preprepared courseware is projected on the screen; In teaching, both need write the blackboard or the blank of usefulness like this, and need prepare the screen that projection is used again, in field research, can bring following inconvenience: (1) increases projection screen before blackboard; Under the situation of wind, cause picture weave influence teaching easily; (2) before blackboard, increase projection screen, can increase the teaching input cost; (3) like directly projection imaging on blackboard of projecting apparatus, picture is very secretly not distinct, and like directly projection imaging on blank of projecting apparatus, then reflecting brightness increases, and contrast is relatively poor, and the blank center has focus (Hot Spot) and produces, and can form dazzling sensation; (4) before blackboard, increase projection screen, reduced the distance between projection screen and the projecting apparatus, under the principle of equidistant imaging, projection ray is overhead highly lower, and teacher shuts out the light under the teaching situation easily like this, the influence teaching.

For overcoming the above problems; Invented projection blackboard in the practice; (patent No. is: 200580051475.2) be example with State Intellectual Property Office's disclosed " projection blackboard and manufacturing approach thereof "; This patent utilization is coated with enamel layer and fires and form on metal substrate, though the projection blackboard that utilizes similar approach to fire possesses the identity of chalk literal and the identity of image, concentrate, disperse on every side in the middle of the light of titanium oxide glaze particle reflection makes easily; Make comparatively clear that the student that is sitting between the first line center sees, and the visual effect that student on every side sees is relatively poor; Adopt 400-800 ℃ temperature cost higher in addition in the sintering procedure.Through the patent data library searching in Taiwan, " Taiwan green glow Internaional, Inc " applied for " promoting the projection screen of development effect " simultaneously, and this patent is with the materials such as epoxide resin, alkyd resin, pearl powder, fluorescer, curing agent and silver powder of liquid kenel; These materials are coated on the rigid or soft base plate; After baking plates one deck aluminium oxide in its surface again, just can accomplish this creation, the projection screen that this patent adopts similar approach to make; But only be used for writing of blank pen; In order to increase erasable property, surface smoothing blank center has focus and produces, and in reality, is unfavorable for promoting the use of on a large scale simultaneously.

The utility model content

The utility model provides a kind of simple in structure, with low cost to the deficiency of prior art, has concurrently to write and the teaching of the projecting function thin plate of fitting automatically.

For realizing above purpose, the technical scheme that the utility model adopts is:

A kind of having concurrently write and the teaching of the projecting function thin plate of fitting automatically, is made up of magnetization sheet metal, grey coating; It is characterized in that: magnetization surface of thin steel sheet spraying grey coating, the magnetization sheet metal utilizes the magnetic absorption principle to be flattened on the traditional blackboard or blank.

The utility model will magnetize surface of thin steel sheet spraying grey coating; Meeting suitably reduces brightness but can increase the projection contrast; And utilize the magnetic absorption principle; The magnetization sheet metal is flattened on the traditional blackboard or blank; Can reach that chalk is write, the dual purpose of wiping and projection identification; Avoid before original blackboard, increasing the trouble of projection screen, saved instruction cost; Under the principle of equidistant imaging; Projection ray is projected on the magnetization sheet metal; Shorten the distance of projector and seriticker; Projection ray's height overhead suitably increases, and teacher is not easy to shut out the light under the teaching situation like this, convenient teaching; Can not change fully under teacher's the teaching custom; Increase projecting function simultaneously, and teacher can be directly does the annotations and comments explanation to project content, this is that traditional blackboard or blank or any fluorescent screen institute are inaccessible.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 installs back projection imaging and original projection imaging light degree of contrast design sketch for the utility model;

The specific embodiment

As shown in Figure 1, a kind of having concurrently write and the teaching of the projecting function thin plate of fitting automatically, is made up of magnetization sheet metal 2, grey coating 3; Magnetization sheet metal 2 utilizes the magnetic absorption principle to be flattened on the cambered surface of traditional blackboard or blank 1; Magnetization sheet metal 2 surface spraying grey coatings 3; Grey coating 3 can suitably reduce projection brightness, but can increase the projection contrast; Simultaneously can also carry out chalk and write, reach chalk and write the dual purpose of discerning with projection on its surface.

Of Fig. 2, when original blackboard or blank 1 carry out projection teaching, need before blackboard or blank 1, add projection screen 4, projection ray is overhead highly lower like this, and teacher shuts out the light under the teaching situation easily, and influence is imparted knowledge to students; The utility model; Magnetization sheet metal 2 utilizes the magnetic absorption principle to be flattened on the cambered surface of traditional blackboard or blank 1, and under the principle of equidistant imaging, projection ray is projected on the magnetization sheet metal 2; Shorten the distance of projector and seriticker; Projection ray's height overhead suitably increases, and teacher is not easy to shut out the light under the teaching situation like this, convenient teaching.

The utility model integral body has advantages such as simple in structure, with low cost, easy for installation, can be widely used at teaching field.

Claims

1. one kind has concurrently and writes and the teaching of the projecting function thin plate of fitting automatically, is made up of magnetization sheet metal, grey coating; It is characterized in that: magnetization surface of thin steel sheet spraying grey coating, the magnetization sheet metal utilizes the magnetic absorption principle to be flattened on blackboard or the blank.