CN2042797U

CN2042797U - Magnetic blackboard without dust

Info

Publication number: CN2042797U
Application number: CN 88201530
Authority: CN
Inventors: 唐宏标; 唐宏楷
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-03-06
Filing date: 1988-03-06
Publication date: 1989-08-16

Abstract

The utility model discloses a magnetic blackboard without dust, which comprises a face sheet, an inner plate, a back cover, a frame, black ferrous powders, magnetic pens and a movable magnetic bar for word erasing. The inner plate, which is white and opaque, is provided with homogeneous distributed small spaces, and the black ferrous powders is arranged inside the small spaces. The face sheet, which is colourless transparent or white semitransparent, makes the handwriting clear. When writing with the magnetic pen, the black ferrous powders are sucked into the small spaces of the inner wall of the face sheet, and the handwriting is displayed. When moving the magnetic bar for word erasing on the outer wall of the back cover, the black ferrous powders are sucked back into the small spaces of the inner wall of the back cover, the lines-of-sight of human are blocked off by a ramp on the passageway of the small spaces, and the handwriting disappears. The magnetic blackboard without dust, which has the advantages that the problem of the chalk dust suction of the teachers is solved and the teaching environment is improved, can be used in the schools and other places.

Description

Magnetic blackboard without dust

The utility model 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, and 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, to 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, and materials are many, increase cost; Size is too little, only is fit to children and pupil's usefulness, and range of application is wideless.

The purpose of this utility model provides the multi-functional dustless magnetic blackboard that a kind of panel, back shroud do not have the magnetic metal thin layer, removes the hardship that Faculty and Students eat chalk dust for a long time, improves teaching environment, ensures that teacher, student are healthy.

Dustless magnetic blackboard of the present utility model is by panel (3), back shroud (9), inner panel (4), black iron powder (6), magnetic pen activity magnetic disappear word rod (10) and framework (2) formation.Panel (3) is water white transparency or white translucent plastic plate or poly (methyl methacrylate) plate, and back shroud (9) is the plastic plate or the poly (methyl methacrylate) plate of White-opalescent.Inner panel (4) is a White-opalescent, annotates with plastics or lucite and makes.Inner panel (4) lining is uniform-distribution with many little spaces, closely fixes a back shroud (9) in the one side of inner panel (4), the black iron powder (6) of the some of packing into equably in each little space then.Equally closely fix a panel (3) at inner panel (4) another side.This packaged blackboard body that is combined into by panel (3), inner panel (4), back shroud (9) of having gone into black iron powder (6) is fixed in the framework (2).Framework (2) is with plastics or metallic plate or wooden making, and bottom or the right and left 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.A disappear end of word rod (10) of activity magnetic is fixed a handle (8) actuating handle (8) and is moved along handle chute (7), and activity magnetic disappears word rod (10) just can be along the parallel word that disappears that moves of chute (11).Installing two suspension ring in framework (2) top are used for hanging blackboard.Magnetic pen adopts prior art.The dustless magnetic blackboard vertical fixing just can be used.

When magnetic pen was write on dustless magnetic blackboard panel (3), because the magnetic force of magnetic pen can be drawn onto the black iron powder (6) that is piled up in the little space of back shroud inwall in the little space of panel inner wall, black iron powder (6) just was deposited in the little space.Because panel (3) is that water white transparency or white are translucent, inner panel (4) is a White-opalescent, so the person's handwriting of white background black just clearly displays.By being positioned at the handle (8) on the handle chute (7), about or disappear word rod (10) 1-2 time of the activity magnetic of moving up and down, the disappear magnetic force of word rod (10) of activity magnetic just sucks back the back shroud inwall to the black iron powder in the little space of panel inner wall.As panel is water white, and inner panel (4) lining little space passage (5) has a slope, and people's sight line is blocked, and can't see the 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 (5).But, can't see the black iron powder at back shroud inwall place equally because panel and back shroud have certain distance.

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 (5) of little space in inner panel (4) lining be sloping passage as " ∧ ", " ∧ ", " ", "

" etc. shape; Panel is that white is translucent.Passage is that scale is carved with on adjacent both sides of straight channel, inner panel or surface, four limits so that measure, mapping etc., increase the function of blackboard, it is multiple that the specification of inner panel has, 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 form by 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 activity magnetic pull bar chute (12) at two ends, framework top, interior dress activity magnetic pull bar (14) can pull out or regain, and is convenient at the other wall chart table of blackboard.Embed several piece small magnet (1) in addition along appropriate location, framework top.Both prevented that activity magnetic pull bar (14) from deviating from, but again the wall chart table, following or two vertical edges are opened 1-2 aperture at framework, so that hold teaching aids such as magnetic pen, small magnet piece.

Dustless magnetic blackboard of the present utility model, 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 the low black iron powder of cost is evenly distributed, and has a clear handwriting; A blackboard surface has a kind of, two kinds or multiple line chart, and convenient teaching is used; Scale is carved with on blackboard surface four limits, is convenient to measure, map; The small magnet of framework top setting-in and activity magnetic pull bar, the wall chart table teaches it 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.Economic benefit and obvious social benefit.

Fig. 1 is the dustless magnetic blackboard structural representation

Fig. 2 is the A-A cutaway view.

Inner panel (4) 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 (5) is " ∧ " shape.Back shroud (9) is the White-opalescent plastic plate, closely is fixed on a surface of inner panel, the black iron powder of the some of evenly packing in each little space then.Panel (3) is water white plastic plate, closely is fixed on another surface of inner panel.The blackboard body that is made of panel (3), inner panel (4), back shroud (9) of black iron powder of will having packed into is fixed in the framework (2), framework (2) is with wooden, there is the activity magnetic word rod chute (11) that disappears in bottom on it, the activity magnetic word rod (10) that disappears is close to the back shroud outer wall, its two ends embed chute (11) lining, a handle (8) is fixed in the disappear lower end of word rod (10), actuating handle (8) moves along handle chute (7), 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 (2) top are used for hanging blackboard.Respectively there is an activity magnetic pull bar chute (12) at the two ends, top of framework (2), and interior respectively have an activity magnetic pull bar (14), can pull out or regain, for using at the other wall chart table of blackboard.Embed six small magnets in framework (2) appropriate location, top, in case pull bar (14) is deviate from and supply the wall chart table to use.Magnetic pen adopts prior art, and so far, dustless magnetic blackboard shows, and its vertical fixing just can have been used.

Claims

1, a kind of dustless magnetic blackboard.Panel (3), back shroud (9), framework (2), magnetic pen are arranged.It is characterized in that the opaque inner panel of adularescent (4), inner panel (4) are uniform-distribution with little space.Black iron 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 (4) lining have garden shape, triangle, square, prismatic, hexagon, several.

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

4, dustless magnetic blackboard according to claim 1 is characterized in that adjacent both sides of inner panel (4) 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 (3) back shroud (9) inner wall surface does not have the magnetic metal thin layer.Panel (3) is water white transparency or white is translucent.

6, dustless magnetic blackboard according to claim 1 is characterized in that panel (3), back shroud (9), inner panel (4) are with plastics or lucite manufacturing.

7, dustless magnetic blackboard according to claim 1, it is characterized in that framework (2) 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, its two ends embed chute (11) lining, are arranged in framework (2) up and down or the right and left handle chute (7) for the disappear handle (8) of word rod (10) of actuating activity magnetic.

8, dustless magnetic blackboard according to claim 1 is characterized in that respectively there is one activity magnetic pull bar chute (12) at framework (2) two ends, top, and the magnetic pull bar of using for the wall chart table (14) is positioned at it.Embed several piece small magnet (1) in framework (2) appropriate location, top, in case pull bar (14) is deviate from and the wall chart table is used.

9, dustless magnetic blackboard according to claim 1 is characterized in that framework (2) is with plastics or metal or wooden making.

10, dustless magnetic blackboard according to claim 1 is characterized in that framework (2) top is equipped with two suspension ring of hanging for blackboard (13), opens 1-2 aperture in following or two vertical edges of framework (2), for the dress magnetic pen, and teaching aids such as small magnet piece usefulness.