CN2508983Y

CN2508983Y - Magnetic nondust teaching blackboard

Info

Publication number: CN2508983Y
Application number: CN 01274042
Authority: CN
Inventors: 陈胜利
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-11-19
Filing date: 2001-11-19
Publication date: 2002-09-04
Anticipated expiration: 2011-11-19

Abstract

The utility model provides a magnetic dustless displaying and teaching board which relates to the teaching tool, and is formed by a grid board whose whole body is compressed into a honeycomb shape, and eliminating liquid, tiny magnetic grains, and displaying liquid which are filled in the grid board, and sealed wearable transparent glass plastic boards which are bonded in parallel. When writing by a magnetic writing pen, the utility model does not produce dust and pollution, can be used long with one investment, and can write freely, and the erasion is labor saving, the contrast of the board is obvious, and the continuity of the writing is excellent. The utility model is best applicable for the teaching in classroom.

Description

The dustless demonstrator of magnetic

Technical field

The utility model relates to teaching aid, is a kind of dustless teaching demonstration plate about making with magnetic material.

Background technology

Existing various demonstrator, blackboard that maximum useful white chalks that use are write and the blank of writing with ink, these all will consume certain material, and certain pollution arranged, by it is the blackboard of writing with chalk, also often a wiping is unclean for dust from flying, with the blank that ink is write, ink blok dyes hand easily, and wiping is also difficult, therefore people have made some special-purpose demonstrators again, but use certain limitation is arranged all, the demonstrator that wherein also useful magnetic material is done is put in the frame trough but the used magnetic material is the little bar magnet that the magnetic bonding forms, write by sliding before and after the magnetic pen absorption and show font, because the deadweight resistance of little bar magnet when sliding is bigger, and slip can not be put in place fully, grid is also bigger at interval in addition, display board is again translucent, therefore the writing that shows is often smudgy, and discontinuous sense is arranged, and the writing of elimination also has not thoroughly situation, so use unsatisfactoryly, promote relatively poor.The utility model then is to make a big improvement from structure, at first be the lattice chamber of flase floor do very little, show apparent liquid in the indoor blanking liquid of packing into successively of grid, magnetic granule and white then, last and transparent solid front panel bonding one, make the lattice chamber become separate closed cells, the magnetic granule moves forward and backward resistance in the containing of blanking liquid very little, the grid interventricular septum is very for a short time make writing show clear and sense of continuity strong.Once drop into, the long-term use eliminated dust from flying and inkiness, reduced muscle power, strengthened the contrast of letter stencil, especially school instruction used to be the best.

Summary of the invention

Shown in the structure adjoint of the present utility model: be followed successively by backboard (1), flase floor (2), little magnetic grain (3), blanking liquid (4), transparent apparent liquid (5) and the transparent front panel (6) shown from left to right.Backboard (1) is made of the thick iron sheet plate in the 1mm left and right sides, peripheral flanging, and the centre is suppressed with reinforcement in order to keep the glacing flatness and the rigidity of iron plate every 200mm, and integral body is done antirust processing; Flase floor (2) becomes the honeycomb type grid with the white plastic plastic compression, each 1.3mm of its grid mouth length and width, dark 4mm, grid wall thickness 0.5mm, cellular grid chamber, circular, polygon also can, be used to fill little magnetic grain (3), blanking liquid (4) and show apparent liquid (5); Little magnetic grain (3) diameter is 1mm, and long 2mm is the ellipticity form, and smooth surface, material are the plumbous nickel cobalt (alloy) of white or the permanent magnetic ferrites of black, selects use according to the color of blanking liquid is different, remakes the processing of magnetizing after treating all to fill moulding; Blanking liquid is the aqueous solution that is added with pigment and additive, and its capacity prescription is: deionized water 70～90%, propane diols 5～15%, water-soluble pigment 2～10%, PTPP 0.05～0.1%, defoamer 0.1～0.5%, anticorrisive agent 0.2～1.0%; Show that showing liquid is the silicone oil of insoluble in water; Front panel (6) is that wear-resisting transparent hard plastic board and flase floor are bonded into composite plate with adhesive, and grid chamber mouth is all shut, and at last whole flase floor and backboard bonding one is promptly become a complete demonstrator that is used to write.

Description of drawings

Accompanying drawing 1 is the schematic cross-sectional view of demonstrator,

Accompanying drawing 2 is the vertical section schematic diagram of demonstrator.

Among the figure, (1) is iron postnotum, finalizes the design and hangs whole demonstrator, and (2) are flase floor, at the indoor filling blanking of grid liquid (4), little magnetic grain (3) with show apparent liquid (5), and front panel (6) encapsulation flase floor and writing.

The specific embodiment

Assembling: at the indoor dark blanking liquid (4) of half-space that fills of cellular grid, the back is at each lattice little magnetic grains of indoor filling (3), liquid level that the inserting of little magnetic grain will guarantee blanking liquid and grid mouth have the distance about 1mm, this space is used to fill the transparent apparent liquid (5) that shows, after treating all to have loaded, front panel (6) and whole flase floor (2) paralleling binding are integral, the gas of not leaving a blank in each grid hole, the ragged edge seam does not have seepage, make each grid chamber become separate sealing not contain gas, after waiting to solidify, demonstrator is magnetized the pole orientation unanimity of then whole little magnetic grains.Grate opening can be pressed into circle, square or polygon.

Use: this demonstrator should vertically be installed on the metope, disappears in blanking liquid because of little magnetic grain, and the time spent can only not seen the blanking liquid color in the transparent panel, and this blanking liquid can be formulated into multiple color.When streaking on the plate in front with magnetic pen, little magnetic grain is subjected to the poles attract on the nib, and just drift shows liquid to showing, just can see with the same vestige of stroke this moment.Otherwise in the time of need wiping, with the magnetic blackboard eraser one brush of same polarity, little magnetic grain is subjected to the effect of homopolarity repulsive force, disappears again in the blanking liquid, and magnetic grain word also just rapidly disappears.The utility model once drops into, and can use for a long time, does not play dirt, does not pollute, and demonstration is rapid, the word that disappears is clean, white gravoply, with black engraved characters, and contrast is clear.The magnetic dot track is continuous, writes and draws figure conveniently, is suitable for school instruction most and uses.

Claims

1, a kind ofly be installed in the dustless demonstrator of magnetic that magnetic material is made by flase floor, it is characterized in that whole demonstrator constitutes a composite plate by postnotum (1), the parallel combination bonding of flase floor (2) front panel (6), and each grid chamber of portion is filled blanking liquid (4), little magnetic grain (3) successively and is shown that apparent liquid (5) constitutes within it, wherein, postnotum (1) forms peripheral flanging by iron sheet (plate) compacting, the centre is pressed with reinforcement, and integral body is done antirust processing; Flase floor (2) becomes honeycomb type by the whole plastic compression of white engineering plastics, and a side opening is used to load magnetic grain and topping up material; Blanking liquid (4) is the aqueous solution that is added with chemical color; Show that apparent liquid (5) is the transparent silicone oil of insoluble in water; And little magnetic grain (3) is ellipticity, and smooth surface can be slided by in blanking liquid (4) the effect front and back of magnetic force; Front panel (6) is wear-resisting transparent hard plastic board, and the grid chamber is become between separate sealing.

2, by the dustless demonstrator of the described magnetic of claim 1, it is characterized in that flange is 10～30mm about postnotum (1) thickness of slab 1mm, reinforcement is at interval about 200mm, to guarantee the glacing flatness of plate; The grid chamber size of flase floor (2) is each 1.3mm of grid mouth length and width, dark 4mm, grid wall thickness 0.5mm; The long 2mm of little Ci grain (3), diameter 1mm makes of plumbous nickel cobalt (alloy) or permanent magnetic ferrites; The volumetric ratio of blanking liquid (4) is a deionized water 70～90%, propane diols 5～15%, water-soluble pigment 2～10%, PTPP 0.02～0.12%, defoamer 0.1～0.6%, anticorrisive agent 0.2～1.0%.