JPH07225558A - Magnetic plotting image - Google Patents

Abstract

PURPOSE:To provide the magnetic plotting device which can freely vary the thickness of a line and give plural colors to the line. CONSTITUTION:This device consists of a flat plate type sealed container 15 which is formed of a nonmagnetic material and filled with plastic fluid liquid 21 and plural microcapsules 23, and a writing body 19 equipped with a magnet piece 17 atop. The sealed container 15 is provided with a transparent plate 26, through which the inside is seen, on the top surface and a magnet plate 35 movably on the reverse surface. Magnetic power or magnetic pieces are provided in each microcapsule 23. The magnet piece 17 and magnet plate 35 have magnetic forces larger than the yield value of the plastic fluid liquid 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic drawing apparatus capable of drawing with a writing instrument having a magnet piece at its tip.

[0002]

2. Description of the Related Art Conventionally, as a magnetic drawing apparatus capable of drawing with a writing instrument having a magnet piece at its tip, there is one described in Japanese Patent Publication No. 57-27463.

In the above-mentioned conventional magnetic drawing apparatus, when the recording magnet is moved on the surface of the surface plate, the magnetic particles are attracted to the recording magnet, and the magnetic particles are drawn along the moving locus of the recording magnet. Has become. Further, when the erasing magnet is moved on the surface of the back plate, the magnetic particles attracted by the recording magnet are attracted to the back plate side, and all the drawn characters, figures, etc. are erased.

[0004]

In the above-mentioned conventional magnetic drawing apparatus, since the size of the magnetic particles attracted to the recording magnet is uniform, there is a problem that it is possible to always draw only with a constant line thickness. there were. Further, since the magnetic particles are always one color, there is a problem that it is impossible to draw in multiple colors.

The present invention has been devised in view of the above problems, and it is an object of the present invention to provide a magnetic drawing apparatus capable of freely changing the thickness of a line and making a plurality of line colors possible. To aim.

[0006]

A magnetic drawing apparatus according to the present invention has the following configuration in order to achieve the above object. (A) A flat closed container made of a non-magnetic material and a writing body having a magnet piece at the tip. (B) The hermetically sealed container has a plastic fluid liquid and a plurality of microcapsules enclosed therein, a transparent plate on the front surface through which the inside can be seen, and a magnet plate movably provided on the back surface. (C) Magnetic particles are provided in each microcapsule. (D) The magnet piece and the magnet plate have a magnetic force equal to or higher than the yield value of the plastic fluid liquid.

In the above structure, each microcapsule is
At least two types of weight may be set depending on the amount of magnetic particles. Further, each microcapsule may be color-coded according to the amount of magnetic particles. Instead of the magnetic particles, one magnetic piece may be provided in each microcapsule. At this time, the magnetic pieces may be set to at least two types depending on the degree of magnetic amount. Each microcapsule,
You may color-code by the degree of the magnetic amount of the magnetic piece provided inside. In the cursive body, the position of the magnet piece can be moved from the tip to the direction opposite to the tip.

[0008]

Since the magnetic drawing apparatus according to the present invention has the above-mentioned structure, when the magnet piece of the writing body is moved on the transparent plate of the closed container, the magnetic force exceeding the yield value of the magnet piece causes
The plastic flowable liquid under the movement trajectory of the magnet piece instantaneously changes from non-flowable to flowable liquid, and the microcapsules can migrate, and the magnetic particles or magnetic pieces inside are attracted to the magnet piece. When the magnet pieces pass by, the plastic flowable liquid becomes a non-flowable liquid due to the flowability, and the microcapsules are brought into a non-migrating state and held in a state of being attracted to the transparent plate. When viewed from the outside of the transparent plate, a line of the color of the microcapsule is drawn on the surface of the color of the plastic fluid liquid along the movement locus of the magnet piece.

When the magnet plate is moved on the back surface of the closed container, the magnetic force exceeding the yield value of the magnet plate causes the plastic fluid liquid on the movement trajectory of the magnet plate to instantaneously change from non-fluidity to fluidity. It becomes liquid, and the microcapsules become electrophoresable and attracted to the magnet plate. When the magnet plate passes by, the plastic flowable liquid becomes a non-flowable liquid due to the flowability, and the microcapsules are in a non-migrating state and are held in a state of being attracted to the back surface. Therefore, when viewed from the outside of the transparent plate, the line drawn along the movement locus of the magnet piece is erased, and only the surface of the color of the plastic fluid liquid remains.

If each microcapsule is set to have at least two types of weight depending on the amount of magnetic particles, or the degree of the magnetic amount of the magnetic piece is set to two types, it cannot be attracted by the magnetic force of the magnet piece of the cursive body. There will be microcapsules. That is, due to the magnetic force of the cursive magnet pieces, the plastic flowable liquid changes from non-flowable to flowable liquid,
A flow viscosity can be obtained. Therefore, a microcapsule having many magnetic particles or a microcapsule having a magnetic piece having a large magnetic amount exerts a larger magnetic force and is attracted against the flow viscosity, and thus a microcapsule having a small number of magnetic particles or a magnetic substance having a small magnetic amount. The microcapsules with pieces do not exert much magnetic force and cannot be attracted against the flow viscosity. Therefore, if the magnetic force is increased, all the microcapsules can be attracted. Therefore, by changing the magnetic force of the magnet pieces of the cursive body, it is possible to change the amount of the microcapsules attracted and the thickness of the line.

When each microcapsule is color-coded according to the amount of magnetic particles or the magnetic amount of the magnetic piece, the color of the line can be changed by changing the magnetic force of the magnet piece of the writing body as described above. .

In the cursive body, by moving the position of the magnet piece from the tip to the direction opposite to the tip, the magnetic force can be changed with one cursive body, and the thickness of the line and the color of the line can be changed. You can

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a hollow substrate made of non-magnetic material,
As shown in FIG. 1, a rectangular display opening 5 is formed in the upper wall 3, and a guide groove 9 extending left and right is formed in the front wall 7. As shown in FIGS. 2 and 3, a magnetic drawing device 11 is provided in the base 1 so as to abut the upper wall 3, and a gap 13 is formed between the magnetic drawing device 11 and the lower wall 4. ing.

The magnetic drawing apparatus 11 is, as shown in FIG.
It is composed of a flat plate-shaped closed container 15 made of a non-magnetic material, and a writing body 19 having a magnet piece 17 at its tip as shown in FIG. The closed container 15 has a plastic flowable liquid 21 and a plurality of microcapsules 23 enclosed therein. A transparent plate 25 through which the inside can be seen is provided on the front surface of the closed container 15, and a magnet plate 35 is movably provided on the back surface. The magnet piece 17 and the magnet plate 35 have a magnetic force equal to or higher than the yield value of the plastic fluid liquid 21.

The closed container 15 has a transparent plate 25 facing the display opening 5 side, a rear plate 27 located on the opposite side of the transparent plate 25, the transparent plate 25, and the upper and lower openings sealed by the rear plate 27. And a frame 29 that is formed. The transparent plate 25 is formed of a plastic plate, a glass plate, a vinyl chloride sheet, or the like. The back plate 27 is also formed of a plastic plate, a glass plate, a vinyl chloride sheet, or the like, but it may be transparent or opaque.

As shown in FIG. 6, the frame body 29 is composed of a substantially square-shaped side wall 31 and a partition 33 provided in the side wall 31. The partition 33 is formed in a honeycomb shape when viewed from the transparent plate 25 side. The partition 33 evenly divides the microcapsules 23 and prevents the microcapsules 23 from being concentrated in one place. In the frame 29, the side wall 31 and the partition 33 can be separately formed from different materials, but can also be integrally formed from the same material such as aluminum or hard synthetic resin. Further, the frame 29 can be integrally formed of the same material as the transparent plate 25 or the back plate 27. In this case, the frame body 29 may be made of a transparent material.

As shown in FIG. 2, the magnet plate 35 is formed to have a length substantially the same as the vertical width of the closed container 15, and is attached to the guide plate 37 so that the magnet plate 35 is located on the closed container 15 side. ing. The guide plate 37 includes a mounting portion 39 to which the magnet plate 35 is attached and a grip portion 41. The grip portion 41 projects outward from the guide groove 9 so that the base 1
It is provided in the inner clearance 13 so as to be movable in the lateral direction.

The plastic flowable liquid 21 can obtain fluidity and flow viscosity at the time of flow by the action of a magnetic force exceeding its yield value, and the magnetic force exceeding the yield value acts. If not, it is illiquid. Therefore, when a magnetic force exceeding the yield value of the plastic flowable liquid 21 acts on the plastic flowable liquid 21, the internal microcapsules 23 can migrate. Held in.

The plastic flowable liquid 21 includes Newtonian flowable liquids such as water, organic solvents and oils, and metallic soap, surfactants, organic gelling agents, polymer compounds, carbon black,
Fine powder silicic acid, thickeners such as bentonite, etc. are dissolved or dispersed alone or in combination. For example: A white plastic fluid liquid prepared by kneading 200 parts of water, 4 parts of finely divided silicic acid, 0.4 part of a nonionic surfactant, and titanium white with a wet disperser. 1.5 parts of titanium white and 1.0 part of surfactant were kneaded, 300 parts of isoparaffin and 10 parts of finely divided silicic acid were added thereto, and kneaded with a wet disperser to prepare a white plasticity. Flowable liquid. A plastic flowable liquid prepared by adding 1 part of aluminum stearate and 1 part of stearic acid to 100 parts of isoparaffin, heating, melting and cooling. A black plastic flowable liquid prepared by adding 5 parts of polyisoptyrene to 100 parts of isoparaffin, heating and dissolving it, adding 3 parts of carbon black and 3 parts of a surfactant, and kneading with a wet disperser.

The inside of each microcapsule 23 is shown in FIG.
As shown in (A), the magnetic particles 24 are filled.
The microcapsule 23 has a size of about 0.5 to 3 mm, and is a thin film having sufficient strength to maintain its original shape even in the plastic fluid liquid 21. As the coating material, for example, phenol-formaldehyde resin, vinyl chloride resin, polyethylene, polypropylene, polymethacrylic acid, nylon, silicone, polyester resin,
ABS resin, gelatin, cellulose, urea resin, melamine resin polyvinyl alcohol, ethylene vinyl acetate and the like are used, and they are formed into capsules according to a conventional method. The microcapsules 23 have an average coating thickness of about 1-50 microns.

The magnetic particles 24 filled in the microcapsules 23 are powders of black magnetite, γ-hematite, chromium dioxide, ferrite, iron, cobalt, nickel and the like. As shown in FIG. 5B, instead of the magnetic particles 24, magnetic pieces 26 larger than the magnetic particles 24 may be inserted into the microcapsules 23 one by one.

Since the magnetic drawing apparatus 11 according to the above embodiment has the above-mentioned structure, when the magnet piece 17 of the writing body 19 is moved on the transparent plate 25 of the closed container 15, the magnet piece 17 is moved.
The magnetic force of the magnetic fluid causes the plastic fluid liquid 21 under the movement trajectory of the magnet piece 17 to instantaneously change from non-fluid to fluid liquid, allowing the microcapsules 23 to migrate, so that the magnetic particles 24 or the magnetic pieces 26 inside the microcapsules 23 migrate. It will be attracted to the magnet piece 17. When the magnet piece 17 passes by, the plastic flowable liquid 2
1 becomes a non-fluid liquid from a fluid, and the microcapsules 23 enter a non-migrating state and are held in a state of being attracted to the transparent plate 25. When viewed from the outside of the transparent plate 25, a line of the color (for example, blue) of the microcapsules 23 along the movement locus of the magnet pieces 17 is drawn on the surface of the color of the plastic fluid liquid 21.

When the grip portion 41 of the guide plate 37 is operated to move the magnet plate 35 on the back surface of the closed container 15, the plastic fluid liquid 21 on the movement locus of the magnet plate 35 is momentarily non-existent. From fluidity to fluidity, microcapsules 2
3 becomes electrophoretic and is attracted to the magnet plate 35. When the magnet plate 35 passes by, the plastic flowable liquid 2
1 becomes a non-fluid liquid from a fluid, and the microcapsules 23 are in a non-migrating state and are held in a state of being attracted to the back surface. Therefore, when viewed from the outside of the transparent plate 25,
The line drawn along the movement trajectory of the magnet piece 17 is erased,
Only the surface (for example, white) of the plastic fluid liquid 21 is present.

In the above embodiment, each microcapsule 23
Although the amount of the magnetic particles 24 or the magnetic amount of the magnetic pieces 26 filled therein is constant, the amount of the magnetic particles 24 or the magnetic amount of the magnetic pieces 26 may be set to at least two types. By doing so, the microcapsules 23 that are not attracted by the magnetic force of the magnet pieces 17 of the writing body 19 exist. That is, due to the magnetic force of the magnet piece 17 of the cursive body 19, the plastic fluid liquid 21 changes from non-fluid to fluid liquid and obtains fluid viscosity. Therefore, the magnetic particles 2
4 or the microcapsule 23 having the magnetic pieces 26 having a large amount of magnetism receives a larger magnetic force and is attracted against the flow viscosity, and thus the microcapsule 23 having a small number of magnetic particles 24 or the magnetism. The microcapsules 23 having the small amount of magnetic pieces 26 do not receive much magnetic force and cannot be attracted against the flow viscosity. Therefore, if the magnetic force is increased, all the microcapsules 23 can be attracted. Therefore, cursive 1
By changing the magnetic force of the magnet piece 17 of No. 9, the amount of the microcapsules 23 attracted can be changed and the thickness of the line can be changed. It is desirable that two types of microcapsules 23 having different amounts of the magnetic particles 24 or different magnetic amounts of the magnetic pieces 26 be equally provided in a portion surrounded by the partition 33.

Furthermore, each microcapsule 23 is
Color coding may be performed according to the amount of the magnetic particles 24 or the degree of the magnetic amount of the magnetic pieces 26. When the respective microcapsules 23 are color-coded according to the amount of the magnetic particles 24 or the magnetic amount of the magnetic pieces 26, the amount of the microcapsules 23 attracted by changing the magnetic force of the magnet pieces 17 of the writing body 19 as described above. Can be changed to change the color of the line from one color (for example, blue) to two colors (for example, blue and red).

In the above embodiment, the magnet piece 17 of the cursive body 19 is used.
Although the position of is always constant, the magnetic force can be changed by moving the position of the magnet piece 45 of the writing body 43 in the axial direction as shown in FIG. 7. That is, in the cursive body 43,
A guide shaft 49 is provided which is biased by a spring 47 in the front end direction.
Is provided. A locking shaft 53 is provided on one side of the guide shaft 49, and the locking shaft 53 slidably engages with a guide groove 55 formed in the side wall of the writing body 43 in the axial direction. ing. In the guide groove 55, the locking shaft 53
First and second locking grooves 57, 59 for locking the spring against the elasticity of the spring 47 are formed.

In the writing body 43, when the locking shaft 53 is locked to the tip of the guide groove 55, the position of the magnet piece 45 projects from the inside of the writing body 43, and the strongest magnetic force is generated. Next, when the locking shaft 53 is locked in the first locking groove 57 against the elasticity of the spring 47, the position of the magnet piece 45 moves into the writing body 43, and the second strongest magnetic force is exerted. generate. Further, when the locking shaft 53 is locked in the second locking groove 59,
The position of the magnet piece 45 moves further into the writing body 43, and the third strongest magnetic force is generated. in this way,
The magnetic force can be changed with one cursive body 43, and the thickness and color of the line can be changed.

The magnet plate 35 is mounted in the base body 1 and movably provided on the back surface of the closed container 15.
Needless to say, it may be provided directly on the back surface of the so as to be movable. Further, the magnetic particles 24 and the magnetic pieces 26 desirably have a magnetic force less than the yield value that changes the plastic fluid liquid 21 from non-fluidity to fluidity, and even if they are non-ferromagnetic materials such as iron. I do not care.

[0029]

In the magnetic drawing apparatus according to the present invention, the microcapsules are attracted by the magnet pieces provided at the tip of the writing body. Therefore, the amount of magnetic particles in the microcapsules or the degree of magnetic quantity of the magnetic pieces can be adjusted. By changing, in the magnet piece having a weak magnetic force, there are microcapsules that are attracted and there are microcapsules that are not attracted, and in the magnet piece that has a strong magnetic force,
All microcapsules will be attracted. Therefore, by changing the magnetic force of the cursive magnet pieces,
There is an effect that the thickness of the line can be freely changed by changing the amount of attracted microcapsules. Further, by color-coding the microcapsules according to the amount of magnetic particles or the degree of magnetic amount of the magnetic pieces, a magnet piece having a weak magnetic force can draw a line of one color and a magnet piece having a strong magnetic force. Allows you to draw lines in more than one color.
Therefore, by changing the magnetic force of the magnet piece of the cursive body, there is an effect that the line color can be changed to a plurality of colors.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part of FIG.

3 is a cutaway front view of a main part of FIG. 1. FIG.

FIG. 4 is an enlarged sectional view of a main part of FIG.

FIG. 5 is an enlarged cross-sectional view of a microcapsule.

FIG. 6 is an enlarged plan view of a frame body.

FIG. 7 is a cross-sectional view of a writing instrument according to another example.

[Explanation of symbols]

 1 Base 3 Upper Wall 4 Lower Wall 5 Display Aperture 7 Front Wall 9 Guide Groove 11 Magnetic Drawing Device 13 Gap 15 Closed Container 17 Magnet Piece 19 Writing Material 21 Plastic Fluid Liquid 23 Microcapsule 24 Magnetic Particle 25 Transparent Plate 26 Magnetic Piece 27 Back plate 29 Frame body 31 Side wall 33 Partition 35 Magnet plate 37 Guide plate 39 Mounting portion 41 Gripping portion 43 Writing body 45 Magnet piece 47 Spring 49 Guide shaft 53 Locking shaft 55 Guide groove 57 First locking groove 58 Second Locking groove

Claims (7)

[Claims] 1. A magnetic drawing apparatus having the following requirements. (A) A flat closed container made of a non-magnetic material and a writing body having a magnet piece at the tip. (B) The hermetically sealed container has a plastic fluid liquid and a plurality of microcapsules enclosed therein, a transparent plate on the front surface through which the inside can be seen, and a magnet plate movably provided on the back surface. (C) Magnetic particles are provided in each microcapsule. (D) The magnet piece and the magnet plate have a magnetic force equal to or higher than the yield value of the plastic fluid liquid. 2. The magnetic drawing apparatus according to claim 1, wherein each microcapsule is set to have at least two types of weight depending on the amount of magnetic particles. 3. The magnetic drawing apparatus according to claim 2, wherein each microcapsule is color-coded according to the amount of magnetic particles. 4. A magnetic drawing apparatus having the following requirements. (A) A flat closed container made of a non-magnetic material and a writing body having a magnet piece at the tip. (B) The hermetically sealed container has a plastic fluid liquid and a plurality of microcapsules enclosed therein, a transparent plate on the front surface through which the inside can be seen, and a magnet plate movably provided on the back surface. (C) One magnetic piece must be provided in each microcapsule. (D) The magnet piece and the magnet plate have a magnetic force equal to or higher than the yield value of the plastic fluid liquid. 5. The magnetic piece is set to at least two types according to the degree of magnetic quantity.
The magnetic drawing device described. 6. The magnetic drawing apparatus according to claim 5, wherein each of the microcapsules is color-coded according to the degree of magnetic amount of the magnetic piece provided therein. 7. The cursive body is characterized in that the position of the magnet piece is movable from the tip to the direction opposite to the tip.
3. The magnetic drawing device according to 3, 5, or 6.