CN2439960Y

CN2439960Y - Magnetic writing plate

Info

Publication number: CN2439960Y
Application number: CN 00251482
Authority: CN
Inventors: 张天赆
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-11
Filing date: 2000-09-11
Publication date: 2001-07-25
Anticipated expiration: 2010-09-11

Abstract

The utility model discloses a magnetic writing board for teaching, which is mainly composed of a transparent panel, a boxwork layer, a small magnetic column, a bottom board and a magnetic pen. By using the utility model, a user can draw relative smooth and fine lines, and handwriting on a word displaying board can be erased arbitrarily. The utility model has the advantages of no dust, sanitation and cleanness, and the magnetic writing board is suitable for being used during teaching in schools.

Description

Magnetic writing board

The utility model belongs to a kind of to be write or drawing article, is mainly used in the teaching aspect.

Present a kind of small-sized magnetic wordpad common on market, main for children to learn to read, calculation is used, its basic principle is: board is mainly by panel, interlayer and base plate are formed, be filled with the thin iron powder of black and the opaque liquid of white in the interlayer of board, the thin iron powder of black is positioned at the lower floor of interlayer at ordinary times, whole plate face looks like white, when on the plate face, writing with the pen that has magnetic, thin iron powder is drawn to the upper strata of board, thereby demonstrate the black that thin iron powder has, that is realized writing function, and when wiping, a bar magnet at the mobile board back side, thin iron powder is drawn to bottom, the plate face has recovered white again, and this board has been realized the function that just can write repeatedly onboard without chalk and ink, but still exists two shortcomings: the firstth, and lines are meticulous inadequately; The secondth, can only carry out the entire plate wiping from behind during wiping, can not before plate, carry out wiping in any part to board.

The purpose of this utility model provide a kind of can erasable repeatedly magnetic writing board, smooth meticulous with the lines that it draws, can before plate, directly carry out wiping to any part of this clipboard.

In order to achieve the above object, the magnetic writing board that the utility model provides is made up of apparent letter stencil body and magnetic pen, described apparent letter stencil body is by transparent panel, base plate and be clipped in panel and base plate between the boxwork layer form, in each grid of boxwork layer, all be placed with a black magnetic paxilla, the size of this magnetic paxilla is slightly smaller than the interior bulk of grid, space filling adularescent viscous liquid in all the other of grid: described magnetic pen is a strip bar magnet, relatively taper of end writes, cleaning and polishing end is round, the magnetic polarity of holding of writing leans on the magnetic polarity of base plate one end identical with the interior magnetic paxilla of boxwork, and the magnetic polarity of magnetic pen cleaning and polishing end is identical by the magnetic polarity of panel one end with the interior magnetic paxilla of boxwork.

Adopt the magnetic writing board of said structure, utilize the magnetic field same sex to repel each other, the principle that there is a natural attraction between the sexes, when with the end that writes of magnetic pen during at apparent letter stencil face paddling, magnetic pen is drawn onto the black magnetic paxilla in the boxwork layer by panel one side, demonstrate the mark of drawing of black, reach to write and show the word purpose, when showing letter stencil with the cleaning and polishing end of magnetic pen is close, the black magnetic paxilla of corresponding position is ostracised by base plate one side, and lean on panel one side by white viscous liquid filling, show the letter stencil display white, the person's handwriting of writing is fallen by " wiping ", reaches the purpose of any part being carried out wiping.

Because the black magnetic paxilla is closed in the boxwork, its volume just is slightly smaller than the internal volume of grid, so it can only can not overturn moving perpendicular to apparent letter stencil direction, has guaranteed that apparent letter stencil can not show entanglement.

Below in conjunction with drawings and Examples the utility model is done further detail explanation.

Fig. 1 is a boxwork layer schematic diagram;

Fig. 2 shows letter stencil structure cut-away view;

Fig. 3 writes view;

Fig. 4 is the wiping view.

Figure 1 shows that circular boxwork layer 2, its each grid is cylindrical, and it is netted that they are staggered to honeycomb.

Fig. 2 shows the cut-away view that shows letter stencil, the upper strata is transparent panel 1, (South Pole S that supposes this magnetic paxilla is towards panel to be placed with a black magnetic paxilla 4 in each grid of middle boxwork layer 2, arctic N is towards base plate) and in grid, be filled with white viscous liquid 5, described magnetic paxilla 4 is a cylinder, this cylindrical diameter is slightly smaller than the diameter of grid, and its height of column is greater than the diameter of grid, it can be moved in grid, but can not overturn, the bottom of boxwork layer 2 is by base plate 3 sealings.

Fig. 3 shows when writing, magnetic pen 6 interacts with magnetic paxilla 4 and shows the situation of writing, the end 7 of writing of magnetic pen book is the N utmost point, different with magnetic paxilla 4 towards the magnetic pole of panel 1 one ends, when with the writing end 7 of magnetic pen on panel 1 during paddling, the attraction that magnetic pen 6 produces magnetic paxilla 4 moves up this magnetic paxilla, and the viscous liquid 5 of white to the bottom, has been seen that from transparent panel the black that is demonstrated by black magnetic paxilla 4 draws mark by row.

In Fig. 4, in the time of need carrying out wiping to the writing of writing, the any part that writing is arranged on the cleaning and polishing end 8 close panels 1 with magnetic pen, because the magnetic polarity of magnetic pen cleaning and polishing end 8 is identical towards the magnetic polarity of panel one end with magnetic paxilla 4, the principle of repelling each other according to the magnetic field same sex, magnetic paxilla in the boxwork is subjected to magneticaction to be pushed to a side by base plate 3, white viscous liquid 5 be filled to grid by panel one side, what see from transparent panel is the white that white viscous liquid 5 shows, the writing of writing is fallen by " wiping ", reaches the purpose of wiping writing.

Certainly, boxwork not necessarily is designed to circle, can be triangle, polygon etc. also, and the shape of magnetic paxilla is corresponding with the shape of boxwork, can not overturn again as long as make the magnetic paxilla be easy to move in boxwork.

Claims

A kind of magnetic writing board, mainly form by transparent panel (1), boxwork layer (2), base plate (3) and magnetic pen (6), in each grid of described boxwork layer (2), place a black magnetic paxilla (4) and in grid, be filled with white viscous liquid (5), it is characterized in that: the magnetic polarity of magnetic pen writing end (7) is identical by the magnetic polarity of base plate one end with the interior magnetic paxilla (4) of boxwork, and the magnetic polarity of magnetic pen cleaning and polishing end (8) is identical by the magnetic polarity of panel one end with the interior magnetic paxilla (4) of boxwork; The height of magnetic paxilla (4) is greater than the grid internal diameter.