CN1040172A

CN1040172A - Dustless magnetic blackboard

Info

Publication number: CN1040172A
Application number: CN 88104988
Authority: CN
Inventors: 唐宏标; 唐宏楷
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-08-08
Filing date: 1988-08-08
Publication date: 1990-03-07

Abstract

A kind of dustless magnetic blackboard.By panel, inner panel, back shroud, framework, magnetic powder, magnetic pen and the activity magnetic word bar construction that disappears.Inner panel is a White-opalescent.Be uniform-distribution with little space in it, the magnetic powder is housed in the little space.The panel water white transparency, or white is translucent, makes to have a clear handwriting.Magnetic pen is write at panel, and the magnetic pruinescence is drawn onto in the little space of panel inner wall, and person's handwriting just shows, the magnetic of the mobile back shroud outer wall word rod that disappears.In the little space of the sucked back again back shroud inwall of magnetic powder.Little space passage has a slope, and the sight line, the person's handwriting that block the people disappear.This dustless magnetic blackboard has been removed the hardship that teacher for a long time eats chalk dust, has improved teaching environment.

Description

Dustless magnetic blackboard

The present invention relates to a kind of dustless magnetic blackboard.

Huang Qilun is with having introduced the magnet board that a kind of Japan produces on " household electrical appliance " that aim at the fourth phase in 1984, its structure and principle are: blackboard the inside is empty, the black iron powder of some is housed, one magnetic metal thin layer is arranged on blackboard panel and the back shroud inner wall surface, panel magnetic a little less than than back shroud magnetic many.Like this, when using magnetic pen greater than back shroud magnetic on blackboard, to slide, will deceive iron powder and be drawn onto on the panel inner wall, and the magnetic of inner wall thin layer holds iron powder and can not drop from back shroud.Because the blackboard panel is translucent white plastics, so blackness handwriting just shows, the handle that the wiping word is used connects the brush of a long bar type, and it just falls iron powder during promotion from the panel inner wall brush.Because the magnetic of back shroud is greater than the magnetic of panel, black iron powder is sucked back again to the back shroud original place.The magnet board of this structure comes with some shortcomings: the inner wall surface of blackboard panel and back shroud all has a magnetic metal thin layer, complex structure, materials are many, increase cost, size is too little, only is fit to children and pupil and uses, range of application is wideless, the word look single, do not show the primary and secondary content, is not easy to learning aid.

The purpose of this invention is to provide a kind of panel, back shroud does not have the multi-functional dustless magnetic blackboard of magnetic metal thin layer, remove the hardship that Faculty and Students eat chalk dust for a long time, improve teaching environment, ensure that teacher, student are healthy.

Dustless magnetic blackboard of the present invention is made of disappear word rod (10) and framework (3) of panel (4), back shroud (9), inner panel (5), black iron powder or red-black magnetic (7), magnetic pen, activity magnetic.Panel (4) is water white transparency or white translucent plastic plate or poly (methyl methacrylate) plate.Back shroud (9) is the plastic plate or the poly (methyl methacrylate) plate of White-opalescent.Inner panel (5) is a White-opalescent, annotates with plastics or lucite and makes.Inner panel (5) lining is uniform-distribution with many little spaces.Closely fix a back shroud (9) in the one side of inner panel (5).If do monochromatic dry state blackboard, the black iron powder (7) of the some of in each little space, packing into equably; If make double-colored dry state blackboard, magnetic powder a little less than the red ferromagnetism powder of the some of packing into by a certain percentage in each little space and black; If make single, double look hygrometric state blackboard, then when the dress magnetic, in each little space, fill with the liquid of congelative White-opalescent not in the ordinary course of things of certain viscosity simultaneously.Equally closely fix a panel (4) at inner panel (5) another side, with this packaged gone into black iron powder or red-black magnetic (7) by panel (4), the blackboard body that inner panel (5), back shroud (9) are combined into is fixed in the framework (3).Framework (3) is with plastics or metal or timber manufacturing.Bottom or limit, the left and right sides have the activity magnetic word rod chute (11) that disappears on it, and the activity magnetic word rod (10) that disappears is close to back shroud (9) outer wall, and its two ends embed chute (11) lining.The disappear mid point of word rod (10) of activity magnetic is fixed a pull bar (8), pull bar (8) by the push-and-pull of the tie rod hole left and right sides, and activity magnetic disappears word rod (10) just along the parallel word that disappears that moves of chute (11).For making the word rod (10) that disappears move more flexibly, can load onto truckle at word rod (10) two ends that disappear at chute (11).Pull bar (8) is made folding, draws can roll over when most to be affixed on framework (3) edge.Earlier its pull-up can be pushed away inward when advancing inward.Installing two suspension ring in framework (3) top are used for hanging blackboard.Magnetic pen also is furnished with ferromagnetism pen and weak magnetic pen except that adopting prior art, the dustless magnetic blackboard vertical fixing just can be used.

If monochromatic blackboard, when on dustless magnetic blackboard panel (4), writing with magnetic pen, because the magnetic force of magnetic pen can be drawn onto the black iron powder (7) that is piled up in the little space of back shroud in the little space of panel inner wall, black iron powder (7) just is deposited in the little space, because panel (4) is that water white transparency or white are translucent, inner panel (5) is a White-opalescent, so the person's handwriting of white background black just clearly displays.If double-colored blackboard, when on blackboard panel (4), writing with weak magnetic pen, because a little less than the magnetic force of magnetic pen, only can be drawn onto the red ferromagnetism powder that is piled up in the little space of back shroud inwall and be piled up in the little space of panel inner wall, so the font of white background redness just displays; When on blackboard panel (4), writing with the ferromagnetism pen, because the magnetic force of magnetic pen is strong, can be drawn onto magnetic powder a little less than red ferromagnetism powder and the black simultaneously and be piled up in the little space of panel inner wall, because it is red, black magnetic powder be have a certain proportion of, the word look that shows still approaches black, it is dark brown, by disappear word rod (10) 1～2 times of pull bar (8) move left and right activity magnetic, the disappear magnetic force of word rod (10) of activity magnetic just sucks back the back shroud inwall to black iron powder in the little space of panel inner wall or red-black magnetic powder.As panel is water white, and the little space passage (6) of inner panel (5) lining has a slope, and people's sight line is blocked, and can't see the black iron powder or the red-black iron powder in the little space of back shroud inwall from the front; As panel is that white is translucent, the no slope of the little space of inner panel passage (6), but, can't see the black iron powder or the red-black magnetic powder at back shroud inwall place equally because panel and back shroud have certain distance; If the hygrometric state blackboard, the black iron powder or the red-black magnetic powder at back shroud inwall place because the liquid in the little space is White-opalescent, be can't see too in the no slope of the little space of inner panel passage (6).

There is various shape in the little space of inner panel.Have garden shape, triangle, square, prismatic, hexagon etc. several.Panel is water white, the passage (6) of little space in inner panel (5) lining be sloping passage as " ∧ ",

Etc. shape; Panel is that white is translucent.Passage is a straight channel, and the little space of the inner panel of hygrometric state blackboard passage also is a straight channel.Scale is carved with on adjacent both sides of inner panel or surface, four limits so that measure, mapping etc.Increase the function of blackboard, the specification of inner panel has multiple.To enlarge the scope of application.

Dustless magnetic blackboard can be made up of one, two or polylith inner panel; Magnetic blackboard also can be made up of inner panel a kind of, two kinds or multiple little space shape, for example is made up of square and the little space of hexagon inner panel; Can obtain M shape plate upper thread figure with the little space of triangle inner panel.So all, add the inner panel of different specification size, just can form diversified dustless magnetic blackboard.In order to increase the function of dustless magnetic blackboard, respectively establish one at two ends, framework top as the television set active pull rod of antenna (13) at random, active pull rod is fixed on the tip axle (1), pull bar places blackboard framework (3) top at ordinary times, need the time spent to pull out, be convenient to embed several piece small magnet (2) in addition along appropriate location, framework top, be convenient to wall chart table on the plate face at the other wall chart table of blackboard.Open 1-2 aperture in framework bottom or two vertical edges, so that hold teaching aids such as magnetic pen, small magnet piece.

Dustless magnetic blackboard of the present invention, following advantage is compared with prior art arranged: dustless magnetic blackboard writes without chalk, dustless, cleaning, pollution-free, remove the hardship that teacher student eats chalk dust for a long time, ensure that teacher student is healthy; Cancelled the magnetic metal thin layer of panel, back shroud inner wall surface, simple in structure, easy to manufacture, materials are few, and cost is low; Black iron powder is evenly distributed, and has a clear handwriting; Red-black magnetic powder mixing energy is by a certain percentage write out two kinds of word looks, and the content of knowing the secondary from the primary is easy to learning aid.A blackboard surface has a kind of, two kinds or multiple line chart, and convenient teaching is used; Blackboard surface is carved with scale on four sides, is convenient to measure, map; The small magnet and the active pull rod of framework top setting-in, the wall chart table is extremely easy; The word that disappears saves time rapidly, increases work efficiency; Blackboard can be made big or small all size, and is of many uses, is specially adapted to teaching.Business efficiency and obvious social benefit.

Fig. 1 is the dustless magnetic blackboard structural representation

Fig. 2 is the A-A cutaway view.

Inner panel (5) is a White-opalescent, annotates with plastics and makes, and its left side is with square little space inner panel, and right-hand part is with the little space of hexagon inner panel, and scale is carved with on four limits.Little space passage (6) is " ∧ " shape.Back shroud (9) is the White-opalescent plastic plate.Closely be fixed on a surface of inner panel.The black iron powder of the some of in each little space, evenly packing into then.Panel (4) is water white plastic plate, closely is fixed on another surface of inner panel.The blackboard body that is made of panel (4), inner panel (5), back shroud (9) of black iron powder of will having packed into is fixed in the framework (3).Framework (3) is with wooden, and there is the activity magnetic word rod chute (11) that disappears in bottom on it, and the activity magnetic word rod (10) that disappears is close to the back shroud outer wall, and its two ends embed chute (11) lining.The mid point of word rod (10) of disappearing is fixed a pull bar (8), actuating pull bar (8) moves along tie rod hole, and the word rod (10) that disappears just can be along the parallel word that disappears that moves of chute (11).Installing two suspension ring in framework (3) top are used for hanging blackboard.Respectively there is an active pull rod (13) at the two ends, top of framework (3), can pull out or regain by pull bar tip axle (1), for using at the other wall chart table of blackboard.Embed six small magnets in framework (3) appropriate location, top, use for the wall chart table.Magnetic pen adopts prior art.So far, dustless magnetic blackboard shows, and its vertical fixing just can have been used.

Claims

1, a kind of dustless magnetic blackboard.Panel (4), back shroud (9), framework (3), magnetic pen are arranged.It is characterized in that the opaque inner panel of adularescent (5), inner panel (5) are uniform-distribution with little space, magnetic powder (6) is housed in the little space, the activity magnetic word rod (10) that disappears is close to back shroud (9) outer wall.

2, dustless magnetic blackboard according to claim 1, the little space shape that it is characterized in that inner panel (5) lining have garden shape, triangle, square, prismatic, hexagon etc. several.

3, dustless magnetic blackboard according to claim 1 is characterized in that panel is water white, and little space passage (6) has the slope; Panel is that white is translucent, the no slope of little space passage (5), and little space passage in the hygrometric state blackboard also is no slope.

4, dustless magnetic blackboard according to claim 1 is characterized in that adjacent both sides of inner panel (5) or surface, four limits be carved with scale, and a thick china of scale is arranged.

5, dustless magnetic blackboard according to claim 1 is characterized in that panel (4), back shroud (9), inner panel (5) are with plastics or lucite manufacturing.Framework (2) is with plastics or metal or wooden making.

6, dustless magnetic blackboard according to claim 1, it is characterized in that framework (3) goes up bottom or the right and left the activity magnetic word rod chute (11) that disappears is arranged, the word rod (10) that disappears is close to back shroud (9) outer wall, and its two ends embed chute (11) lining.Be positioned at framework (3) up and down or the middle part of the right and left for the disappear pull bar (8) of word rod (10) of actuating activity magnetic.The also available fax of word rod that disappears of activity magnetic is moving.

7, dustless magnetic blackboard according to claim 1, it is characterized in that respectively there is an active pull rod (13) at framework (3) two ends, top, embed several piece small magnet (2) in framework (3) appropriate location, top, use for the wall chart table.

8, dustless magnetic blackboard according to claim 1 is characterized in that the magnetic powder has two kinds of black, redness, and their magnetic has strong, weak branch.

9, dustless magnetic blackboard according to claim 1, the magnetic that it is characterized in that magnetic pen has the branch of power.