CN102350906A

CN102350906A - Blackboard

Info

Publication number: CN102350906A
Application number: CN2011103471402A
Authority: CN
Inventors: 王静
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-11-04
Filing date: 2011-11-04
Publication date: 2012-02-15

Abstract

The invention discloses a blackboard, comprising a common blackboard surface, wherein a layer of extremely thin and hard transparent white glass is paved in front of the common blackboard surface, a layer of magnetic sand capable of being absorbed by a magnet penetrates into the part between the glass and the blackboard to be absorbed on the glass not tightly, the cartridge of a writing pen is a small magnet, and a pen eraser is a long rolling strip installed between the blackboard and the glass. The blackboard has the advantages that in the use process, no dust is generated, no harm is generated to bodies of users, and environmental pollution and resource waste are not produced.

Description

A kind of blackboard

Technical field

The present invention relates to a kind of blackboard, in particular to a kind of magnet-type blackboard.

Background technology

Blackboard in the past, what the teacher used is that chalk is write on blackboard, dust can produce very major injury to teacher's health, and writing time has been grown the meeting easy fatigue.On the other hand, chalk fractures easily, and uses insufficiently, has caused the waste of resource and the pollution of environment, not enough environmental protection.

Summary of the invention

The objective of the invention is to overcome above-mentioned defective, a kind of magnet-type blackboard is provided, can not produce dust.

Scheme of the present invention is: the extremely thin hard transparent whites glass of one deck tiled before on a normal blackboard surface; Between glass and blackboard, infiltrating one deck can be husky by the magnetic of magnet absorption; And it is on glass that magnetic sand is not adsorbed on tightly, and corresponding lettering pen is that pen core is the pen of a small magnet; The pen that is adopted is wiped a long bar that rolls between blackboard and glass, installing, and when writing on blackboard with lettering pen, because the effect of magnetic force, it is on glass that the small magnet of lettering pen is attracted to magnetic sand, forms writing; In the time of need be with the writing erasure, the length between blackboard and the glass be rolled bar and is rolled the writing erasure on the glass plate.

One of improvement project of foregoing invention is that said pen is wiped and comprised electric device, drives the long bar that rolls and rolls and carry out black print automatically and examine and remove.

The invention has the advantages that: in use, can not produce dust, can not cause actual bodily harm, also can not cause the environmental pollution and the wasting of resources the user.

Description of drawings

Fig. 1 is a structural representation of the present invention;

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention.

Shown in accompanying drawing 1, the present invention includes the glassy layer 3 of blackboard 1 and its front end, the middle magnetic husky 2 that embeds; And magnetic husky 2 is not adsorbed on the glassy layer 3 tightly, when on blackboard, writing, because the effect of magnetic force with lettering pen; The small magnet of lettering pen is attracted to magnetic sand on glass, forms writing; In the time of need be with the writing erasure, the length between blackboard and the glass be rolled bar 4 and is rolled the writing erasure on the glass plate.

As one of improvement project of the present invention, said pen is wiped can comprise electric device, drives the long bar that rolls and rolls and carry out black print automatically and examine and remove.

Claims

1. black print; It is characterized in that: comprise a normal blackboard surface; At the extremely thin hard transparent whites glass of its front tiling one deck; Between glass and blackboard, infiltrating one deck can be husky by the magnetic of magnet absorption; And it is on glass that magnetic sand is not adsorbed on tightly, and lettering pen is that pen core is the pen of a small magnet; Pen is wiped a long bar that rolls between blackboard and glass, installing.

2. blackboard as claimed in claim 1 is characterized in that: said pen is examined to comprising electric device, drives the long bar that rolls and carries out black print automatically and examine and remove.