CN201390059Y - Dust-free vision-aid blackboard - Google Patents

Abstract

A dust-free vision-aid blackboard is used for resolving the problem of glare and dust of a blackboard, and comprises a base plate and a transparent writing screen arranged at the front of the base plate, wherein the peripheries of the base plate and the writing screen are respectively equipped with support frames, and a lightening device is disposed between the writing screen and the base plate. The dust-free vision-aid blackboard utilizes a light box structure inside which the lightening device is arranged to lead light source to be emitted from the whole writing screen, sufficiently utilizes the backlight transmission characteristic of materials of a light guide and diffusion layer, has high light releasing rate, leads light to spread evenly and naturally, completely avoids halation and light reflection, has high brightness and is suitable for being viewed from a long distance. Besides, the surface of the transparent writing screen is smooth, a user can write on the screen surface with a water color pen, the writing can be erased directly through a rag, no mark remains, and hazards of chalk dust are avoided, accordingly environment protection and health can be obtained. The dust-free vision-aid blackboard utilizes frames and the base plate made of steel and plastic structures, has simple structure, attractive appearance, and convenient installation and use.

Description

A kind of dustless viewing-aid blackboard

Technical field

The utility model relates to a kind of improved blackboard, belongs to teaching assistant product technical field.

Background technology

At present, a large amount of in the school also at the blackboard that uses cement, plank or frosted glass to make, this blackboard is low because of its cost, write and conveniently obtain using comparatively widely, but its shortcoming is also fairly obvious, the blackboard surface local that uses of a specified duration can be very level and smooth, form the retroreflective regions of localized specular reflections on the blackboard, and retroreflective regions can reflect the writing that does not see on the blackboard because of blackboard; Under the situation bad or that have a power failure at dusk, the writing on the blackboard is difficult for distinguishing that long-time the use has a strong impact on teaching, even the infringement student eyesight in daylighting.The employed writing implement of normal blackboard is a chalk, when erasing handwriting, produces a large amount of chalk dusts and fills the air in air, is adsorbed on human body skin or enters lung, accumulates over a long period, and harmfulness is very big.The long-term chalk dust that sucks can stimulate upper respiratory tract mucosa, causes rhinitis, sphagitis or bronchitis.Therefore, need a kind of multi-functional blackboard of design badly, with the harm that solves blackboard reflective light and chalk dust.

Summary of the invention

The utility model is used to overcome the defective of prior art and provides a kind of simple in structure, attractive in appearance solid, the blackboard of not reflective, no dust harzard.

The alleged problem of the utility model solves with following technical proposals:

A kind of dustless viewing-aid blackboard is provided with substrate and transparent writing screen in the formation, substrate is arranged on the back of transparent writing screen, is provided with support frame around described substrate and the transparent writing screen, sets up light-emitting device between transparent writing screen and substrate.

Above-mentioned dustless viewing-aid blackboard, described light-emitting device is made up of light source and leaded light diffusing layer, and light source is fixed on the substrate, and substrate is a hard sheet.

Above-mentioned dustless viewing-aid blackboard, the writing surface of described transparent writing screen are shiny surface, and another side and leaded light diffusing layer fit tightly.

Above-mentioned dustless viewing-aid blackboard, described light source are LED lamp or fluorescent lamp.

The utility model adopts the lamp box structure of built-in light-emitting device, and light source is penetrated from the whole writing screen of blackboard, and the definition height has avoided reflective; Light-emitting device adopts light source and leaded light diffuse material, and light evenly penetrates from leaded light diffusing layer surface after refraction is dispersed, and thoroughly avoids halation and dazzle; Wherein, the leaded light diffusing layer can cut into needed size arbitrarily, also can splice use, is used with a plurality of light sources, can make the blackboard of different size.Writing screen adopts light-passing board, and the light-passing board writing surface is smooth, can use watercolor pencil to write, and directly wipes with rag after using up, and leaves no trace, and environment protection health does not have the evil of chalk dust.Substrate of the present utility model, support frame adopt environment-friendly light steel, mould structure or aluminum alloy materials, have overall structure simple, frivolous with material, install easy, sturdy and durable, rakish characteristics.

Description of drawings

Fig. 1 is the utility model front view;

Fig. 2 is the A-A section enlarged diagram of Fig. 1.

Label is expressed as follows in the accompanying drawing: 1. substrate; 2. support frame; 3. transparent writing screen: 4. light source; 5. leaded light diffusing layer.

The specific embodiment

Referring to Fig. 1, Fig. 2, the utility model is with solving dazzle, the dust problem that has now in the blackboard use.Be provided with support frame 2 and substrate 1 in the formation, described substrate front is transparent writing screen 3, substrate and transparent writing screen are installed in the support frame, set up light-emitting device in the cavity between the two, and described light-emitting device is made up of light source 4 and leaded light diffusing layer 5, wherein, light source is fixed on the substrate, and described light source has several, and a plurality of light sources evenly distribute, each light source illuminates a part of leaded light diffusing layer, and a plurality of light sources illuminate whole leaded light diffusing layer; The leaded light diffusing layer is close on the transparent writing screen, and described transparent writing screen writing surface is smooth, can adopt light color such as transparency glass plate, transparent plastic sheet or colourless transparent material to make.Substrate is a hard sheet, in the present embodiment, adopts the aluminium alloy plate of lightweight to make, and light source can adopt energy-conservation fluorescent tube or LED lamp, and light source is connected with power supply.

The utility model in use, opening power, power saving fluorescent lamps emits beam, the light-emitting device of forming between light source and the corresponding leaded light diffusing layer, can send parallel area source, penetrated by transparent writing screen then, light disengages the rate height, and light is propagated evenly, nature, halation and the dazzle of thoroughly avoiding the simple light source lighting to cause, simultaneously, owing to light outwards appears from transparent writing screen the inside, so the plate face is not reflective.Adopt dark watercolor pencil as writing implement; font is big and do not have a dust; but continuous writing improves the classroom utilization rate, helps the healthy of Faculty and Students; with distinct contrast between the transparent writing screen of dark writing and light color; the definition height is suitable for watching at a distance, and is not reflective in any angle; do not influence student's sight line, effectively vision protection.The utility model product has a clear superiority in than traditional blackboard, and under the darker situation of light, the beholder also is easy to see clearly writing, the history that teacher Xie Shuliao can not give a lesson when self-study at night.

The utility model leaded light diffusing layer material has adopted LGP, and LGP is the acryl sheet material that utilizes optical grade, with having the high reflectivity and the material of extinction not, stamps the leaded light point in the acryl sheet material bottom surface of optical grade with the UV screen printing technology then.The light that utilizes optical grade acryl sheet material to draw to send from light source is in the stop on optical grade acryl sheet material surface, and when light was mapped to each leaded light point, reverberation can destroy conditioned reflex by the positive ejaculation of LGP then toward all angles diffusion.By various densitys, leaded light point not of uniform size, can make the LGP uniformly light-emitting.

Claims (4)

1. dustless viewing-aid blackboard, it is characterized in that be provided with substrate (1) and transparent writing screen (3) in the formation, substrate is arranged on the back of transparent writing screen, be provided with support frame (2) around described substrate and the transparent writing screen, between transparent writing screen and substrate, set up light-emitting device.

2. dustless viewing-aid blackboard according to claim 1 is characterized in that, described light-emitting device is made up of light source (4) and leaded light diffusing layer (5), and light source is fixed on the substrate, and substrate is a hard sheet.

3. dustless viewing-aid blackboard according to claim 1 and 2 is characterized in that, the writing surface of described transparent writing screen is a shiny surface, and another side and leaded light diffusing layer fit tightly.

4. dustless viewing-aid blackboard according to claim 3 is characterized in that, described light source is LED lamp or fluorescent lamp.

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