JPH0430076Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a magnetic drawing board that displays characters, figures, etc. by attracting magnetic powder filled with viscous fluid into a sealed honeycomb-shaped chamber with a magnetic pen. In particular, information such as characters and figures displayed on a magnetic drawing board is replaced with electrical signals and displayed on an external CRT display device, and the display of radio-controlled models, etc. at a remote location is performed based on position coordinate information input using a menu method. This invention relates to a magnetic drawing board capable of operating a power device.

(Prior Art) A magnetic drawing board that can display characters and figures by attracting magnetic powder sealed together with a viscous fluid in a non-magnetic airtight container with a magnetic pen is disclosed in, for example, Utility Model Application No. 56-81799. Those disclosed in official gazettes are known.

FIG. 4 shows an example of the above-mentioned conventional magnetic drawing board.The entire outer surface of the magnetic drawing board 1 is formed of a frame 2, a top plate 3, and a bottom plate 6, all of which are made of non-magnetic material.
A display section 12 of a magnetic drawing board is provided at an intermediate portion inside the top plate 3 and the bottom plate 6. Furthermore, this display section 12 is constructed by filling a large number of small chambers 7 formed in a honeycomb shape with a highly viscous fluid and magnetic powder 8, and sealing them with a front plate 4 and a back plate 5. 1
When the magnetic pen 10 having a permanent magnet at the tip is brought into contact with the pen 2 and moved from above, the magnetic powder in each honeycomb-shaped chamber is attracted to the surface plate 4 side, and is moved along the movement trajectory of the magnetic pen 10. The drawing is displayed.

In addition, when erasing characters and figures drawn on the display section 12, by moving the erasing lever 9 on the left side in the figure within the space section 11 along the direction of the arrow in the figure,
Due to the attractive force of the magnetized erase lever 9, the magnetic powder 8 attracted to the front plate 4 side is attracted to the back plate 5 side, and all characters and figures seen from the upper plate 3 side are erased.

(Problems to be Solved by the Invention) The above-mentioned magnetic drawing board was developed for the purpose of being an educational toy, and is extremely simple in construction and inexpensive. However, since the magnetic material is handled mechanically, there is a problem that it lacks expandability and that the simple drawing function becomes gradually boring.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a magnetic drawing board which eliminates the above-mentioned drawbacks and at the same time is expandable by adding electrical means to the magnetic drawing board.

(Means for Solving the Problems) The magnetic drawing board of the present invention displays characters, figures, etc. by attracting magnetic powder filled with viscous fluid into a number of small chambers formed in a honeycomb shape using a magnetic pen. A magnetic screen display section, and a transparent transparent panel that is removably provided on the top surface of the magnetic screen display section and seals the small chamber filled with the viscous fluid and magnetic powder, detects the pressed position of the magnetic pen, and outputs a coordinate signal. a coordinate input sheet, a control unit that controls the coordinate signals to display information such as the above characters and figures on an external CRT display, and a transmission circuit that operates the power plant at a remote location based on the coordinate input. The present invention is characterized in that an input mode for characters and figures, etc., and a power unit operation mode can be selectively selected.

(Function) In the magnetic drawing board of the present invention, a transparent coordinate input sheet is pasted above the magnetic drawing board display part to form the magnetic drawing board display part, and the upper surface of the coordinate input part which also serves as the magnetic drawing board display part is attached with a magnetic pen. When pressed lightly, the magnetic powder filled in the honeycomb-shaped chambers of the magnetic drawing board is attracted, and the desired characters and figures are displayed on the top surface of the transparent coordinate input sheet, as well as the positional information of the pressed point of the magnetic pen. The signal is converted into an electrical signal, displayed on an external CRT display, and is used to operate a remote power device based on information about the position of the magnetic pen.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 1, the outer surface of the magnetic drawing board 21 is formed by a frame 22 made of the outer surface of a non-magnetic material 21 such as resin or wood.
and a bottom plate 23, and a magnetic drawing board display section 24 is provided approximately at the center of the frame body 22. The magnetic drawing board display section 24 is also made of a non-magnetic material, and a large number of small chambers 25 shaped like a honeycomb are placed on the back plate 28.
At the same time, resistance sheets 30 and 31, which will be described later, are pasted above the small chamber 25, and the small chamber 25, back plate 28, and resistance sheet 31 are integrally joined to form the magnetic screen display section 24. Note that the height dimension of the honeycomb-shaped chamber is slightly smaller than that of the conventional one.

On the other hand, on the resistance sheet 31 on the upper surface of the magnetic screen display section 24 described above, a resistance sheet 30 forming a pair with the resistance sheet 31 is placed. By pressing the surfaces of these pair of resistance sheets 30 and 31 with a writing instrument or a finger, the two sheets come into contact with each other,
This device is similar to a coordinate input device called a tablet, which detects the X and Y coordinates of a contact point in an analog manner as a current or voltage value.

Note that the resistance sheets 30 and 31 shown in the drawings are shown enlarged in the thickness direction, but in reality, transparent sheets such as thin plate-shaped glass mylar films are coated with a thin film of indium oxide or tin oxide on one side of the insulation sheet. It is a transparent resistor on which a resistive layer is uniformly deposited, and parallel electrodes made of a material such as silver paste are provided at both ends of the resistive layer.

Next, as shown in FIGS. 2 and 3, the upper surface of the magnetic screen 21 is composed of a coordinate input section 33 which also serves as the magnetic screen display section 24, and an operation section 32. Furthermore, the operation section 32 has 16 colors. Operation buttons such as a color designation key, a reset button, a memory button, a memory recall button, a box fill button, and a power switch are provided. The interface circuit 35 shown in FIG. 2 includes an A/D converter that converts coordinate output signals from analog to digital, and the controller 36 includes input ports for color designation keys, system ROM, RAM, VRAM, CRT drive unit, etc. It has the following functions. The above-mentioned interface circuit 35 and control section 36 are composed of a 1-chip microcomputer, and the screen main body 21a
is stored in

The signal is then connected to the output D/A conversion section 42 of the control section 36, converted into an analog signal, and then sent to an external CRT display device 37. Further, the transmitting circuit 43 is a radio-controlled transmitting circuit for operating the radio-controlled model power at a remote location by proportional control based on the position information input to the magnetic pen 34 of the coordinate input unit 33.
Send from 4.

The magnetic drawing board 21 includes a ROM cassette and a menu input sheet 27 for switching the drawing board main body 21a from character input mode to radio control transmission mode.
is prepared, and when the ROM cassette 40 is inserted into the side insertion slot 41 of the drawing board main body 21a, it automatically switches to the radio control transmission mode and enters the menu-based input mode. In this radio-controlled transmission mode, the menu input sheet 27 is attached to the coordinate input section 33, and the input coordinate position is specified using the magnetic pen 34.

In this case, the center of the menu input sheet 27 becomes the origin of the coordinates, and the signal is used to proportionally control the power unit of the operated model by the distance that the magnetic pen 34 is moved from the origin in any direction on the X and Y axes. The signal is output from the transmitting circuit 43, is received by a receiver at a remote location (not shown), and is configured to drive its servo motor.

Next, the operation of the present invention will be explained.

When the tip of the magnetic pen 34 is placed on the coordinate input section 33 that also serves as the magnetic display surface of the drawing board body 21a and pressed lightly, the magnetic powder 26 in the small chamber 25 below the magnetic pen 34 is attracted upward, and the magnetic pen 34 is moved. Characters and figures are drawn according to the instructions on the transparent resistance sheet 3.
Coordinate input section 33 that also serves as a display screen through 0 and 31
The drawing is displayed.

At the same time, by pressing the magnetic pen 34, the coordinate position of the contact point on the resistance sheet 30 is changed to the other resistance sheet 3.
It is detected as an electrical signal as the partial voltage ratio of the resistance at one electrode. The detected analog coordinate signals are A/D converted by the interface circuit 35, and the X, Y coordinate signals are sent to the control section 36. The control unit 36 has X,
The Y coordinate signal is taken into the RAM and stored, and an image signal is output based on predetermined information stored in the ROM, and an external CRT display device 37 is driven for display.

Here, if you select the color designation button on the operation unit 32 and draw, the characters and figures raised by the magnetic powder 26 will be in monochrome tone, but the image projected on the external CRT display device 37 will be in the designated color. Corresponds to
Furthermore, by operating the box fill button on the operation section 32, the inside of the frame of the drawn figure can be filled in with a specified color.

Furthermore, when switching the drawing input mode of the drawing board body 21a to the radio control transmission mode and operating a power device such as a radio control car using the magnetic pen 34,
The ROM cassette 40 is inserted into the side insertion opening 41 of the drawing board main body 21a, and the menu input sheet 27 is attached to the coordinate input section 33. At this time,
Predetermined information regarding coordinate setting is read from the ROM cassette 40, and the radio control transmission mode is set.

Therefore, in this mode, when the magnetic pen 34 is placed at the origin in the center of the menu input sheet 27, the controlled device is in a neutral state, and when the magnetic pen 34 is moved from the origin in any direction on the X and Y axes. , the coordinate signals of the pressed position are output from the resistance sheets 30, 31, and the servo motors of the operated device corresponding to the X and Y signals are proportionally controlled, so that the power device can obtain the desired operation.

Here, insert the magnetic pen 34 into the menu input sheet 2.
When released from above, the coordinates automatically return to the origin and the controlled device becomes neutral.

Next, when erasing characters and figures on the magnetic drawing board display section 24, the magnetic powder 26 is moved into the small chamber 25 by moving the erasing lever 38 along the space 39 at the bottom of the drawing board main body 21a in the direction of the arrow shown in the figure. The drawing is sucked downward and the figure is erased. Also, when erasing all the displayed figures on the external CRT display device 37,
It can be erased by operating the reset button on the operation unit 32. If you want to erase a part of the figure for correction, press the color designation button for the background color, for example white, on the external CRT display device 37 and use the magnetic pen 34. If you trace the corrected part with , it will be partially erased.

Furthermore, if you wish to temporarily store the drawn figure, you can do so by operating the memory button on the operation unit 32, and if you wish to recall the memorized figure, by operating the memory recall button. Each objective is achieved.

In addition, the tablet can be attached and detached from a conventionally known magnetic drawing board that has a display section that displays characters, figures, etc. by attracting magnetic powder filled with viscous fluid into a number of small chambers formed in a honeycomb shape using a magnetic pen. However, when the tablet is not attached to the magnetic drawing board, it may be controlled by an attached device.

(Effects) As described above, according to the magnetic drawing board of the present invention, based on the coordinate input sheet provided integrally with the magnetic drawing board display section and the position coordinate signal input from this coordinate input sheet with a magnetic pen, It is equipped with a transmitting circuit for operating the power device at the location, and is configured to be able to selectively select an input mode such as characters and figures, and a power device operation mode. As an operating device that allows the device to be operated freely, it can be widely used for education and entertainment. Therefore, it is expandable in terms of usage.
Significant effects can be expected.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, with Figure 1 being a cross-sectional view of a magnetic screen, and Figure 2 showing a circuit for extracting coordinate signals from the magnetic screen and displaying them on an external CRT display. FIG. 3 is an external perspective view of a magnetic drawing board, and FIG. 4 is a sectional view of a conventional magnetic drawing board. Code, 21...Magnetic drawing board, 24...Magnetic drawing board display section, 25...Small room, 26...Magnetic powder, 30,3
1...Resistance sheet, 33...Coordinate input section, 36...
...Control unit, 43...Transmission circuit.

Claims (1)

[Scope of utility model registration request] A magnetic screen display unit that displays characters, figures, etc. by attracting magnetic powder filled with viscous fluid into a large number of small chambers formed in a honeycomb shape using a magnetic pen, and a magnetic screen that can be detachably attached to the top surface of the magnetic screen display unit. A transparent coordinate input sheet is provided, which seals a small chamber filled with the viscous fluid and magnetic powder, detects the pressed position of the magnetic pen, and outputs a coordinate signal, and controls the coordinate signal to generate the characters and figures. It is equipped with a control unit that displays information such as on an external CRT display device, and a transmitter circuit that operates the power plant at a remote location based on the coordinate input, and controls the input mode of the above characters and figures, and the power plant operation mode. A magnetic drawing board characterized in that it can be selectively taken.