JPH0210446B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention is a coordinate input system that selectively displays position data on a position detecting tablet by operating a position specifying magnetic generator or a keyboard. Regarding output devices.

(Prior Art and Problems) Conventionally, input/output devices for characters, etc. have been provided in which a tablet for writing handwritten characters and figures and a display for displaying the handwriting and recognition results are configured and arranged separately. However, in order to confirm that the handwritten characters and figures on the tablet are correctly recognized and input, it is necessary to alternately look at the tablet surface and the display surface. This significantly impairs operability. In addition, when editing to correct or insert characters, move the cursor to specify the position of the character to be corrected or inserted, so move the cursor while recognizing the current position of the cursor and the position of the target character in the document. However, there were some difficulties in operability.

On the other hand, on the other hand, a coordinate input/output device that integrates a tablet and a display is developed, for example, in JP-A-58
- Proposed in Publication No. 144287, etc., by directly specifying any position in a displayed document using a stylus pen connected to a character recognition circuit on a tablet, editing work and input/output work can be performed. It was decided to become easier. In other words, from the input stage, the scribe simply writes in any text according to the input format that appears on the tablet, providing the same operability as creating a document while layouting it on output paper. be able to.

However, with such coordinate input/output devices, when writing characters on the tablet or in the figure entry area, the cord that connects the character recognition circuit and the stylus pen becomes an obstacle. There was a practical problem in that characters and positions could not be specified with high precision unless the tablet was brought into contact with or close to the tablet.

In addition, the coordinate input/output device described above allows coordinate input and editing work only with a stylus pen, and the structure does not allow direct input of clear characters and symbols using a keyboard device. There was a practical problem in that it delayed the input and editing work of complicated characters.

(Objective of the Invention) The present invention is intended to solve such conventional problems, and uses a cordless magnetic material to display characters and symbols as position data specified on the tablet on a display integrated with the tablet. In addition, the present invention provides a coordinate input/output device that allows characters and symbols selected by a keyboard device to be displayed on a tablet at positions specified by a position specifying magnetic generator via a display. purpose.

(Principle of the Invention) When a magnetostrictive vibration wave propagates in a magnetostrictive transmission medium, a part of the mechanical vibration energy is converted into magnetic energy in a region where the magnetostriction vibration wave exists, and a local magnetic field fluctuation occurs. The magnitude of this magnetic field fluctuation increases as the coefficient (hereinafter referred to as electromechanical coupling coefficient) indicating the conversion efficiency from mechanical energy to electrical energy (or from electrical energy to mechanical energy) increases, and The coupling coefficient becomes maximum near a certain bias magnetic field. Therefore, if magnetism is applied from a position specifying magnetic generator to a certain portion of a magnetostrictive transmission medium in which a coil is wound over almost its entire length, the magnetism will propagate through the magnetostrictive transmission medium. When the magnetostrictive vibration waves reach that position, a large magnetic field fluctuation occurs, and at that time, a large induced electromotive force (induced voltage due to the magnetostriction vibration waves) is generated in the coil.
occurs. Therefore, by detecting the timing of generation of this large induced electromotive force, it is possible to know the time required for the magnetostrictive vibration wave to reach the position specified by the position specifying magnetic generator, and from this time it is possible to determine the specified position. This makes it possible to detect the position of the user.

Furthermore, the magnitude of the magnetostrictive vibration waves generated by applying instantaneous magnetic field fluctuations to the magnetostrictive transmission medium also increases as the electromechanical coupling coefficient increases. Therefore, if a magnetostrictive transmission medium in which a coil is wound over almost its entire length is applied with a magnetism that increases the electromechanical coupling coefficient from a position specifying magnetic generator, it is possible to apply a pulse voltage to that coil. If applied,
Large magnetostrictive vibration waves are generated only in designated areas. Therefore, if the magnetostrictive vibration waves are detected with another coil installed at the end of the magnetostrictive transmission medium, when a large magnetostrictive vibration wave reaches that coil, the induced electromotive force (induced voltage due to the magnetostrictive vibration waves) will increase, and this By detecting the timing, it becomes possible to detect the designated position as before.

Furthermore, the position signal detected in this way is input to a computer and displayed at the corresponding position on the display stacked on the tablet. Characters and symbols input from each device can also be displayed on the display.

Embodiments of the present invention will be specifically described below with reference to the drawings.

(Embodiment of the Invention) FIG. 1 is an explanatory diagram of the configuration of an X-direction position detection section in an embodiment of the present invention. In the same figure, 1
Magnetostrictive transmission media a to 1d are made of a material having a magnetostrictive effect, and are arranged substantially parallel to each other along the X direction. Any ferromagnetic material can be used as the magnetostrictive transmission media 1a to 1d, but a material with a large magnetostrictive effect, such as an amorphous alloy containing a large amount of iron, is particularly desirable in order to generate strong magnetostrictive vibration waves. Further, it is preferable to use a material with a small coercive force that is difficult to magnetize even when a magnet is brought close to the material. As the amorphous alloy, for example, Fe ₆₇ Co ₁₈ B ₁₄ Si ₁ (atomic %), Fe ₈₁ B _13.5 Si _3.5 C ₂ (atomic %), etc. can be used.
The magnetostrictive transmission media 1a to 1d have an elongated shape, and the cross section is preferably a rectangular thin strip or a circular linear shape, and in the case of a thin strip, the width is about several mm and the thickness is several microns.
A thickness of about 100 μm to several 10 μm is easy to manufacture and has good characteristics.

Reference numeral 2 denotes a first coil in the X direction that is commonly wound around one end of the magnetostrictive transmission media 1a to 1d, and the number of turns is two in the illustrated example, but it may be wound once or more than three times. This X-direction first coil 2 generates an instantaneous magnetic field fluctuation perpendicular to the coil surface to generate a magnetostrictive transmission medium 1a.
~1d is for generating magnetostrictive vibration waves at each winding portion, and one end 2a of the coil 2 is connected to the + terminal of a pulse current generator 3 that generates a pulse current sufficient to generate the magnetostriction vibration waves. and the other end 2b is connected to that one terminal.

Numerals 4a to 4d are biasing magnetic bodies, which are used to apply a bias magnetic field parallel to the longitudinal direction of the magnetostrictive transmission media 1a to 1d to the wound portion of the first coil 2 in the X direction of the magnetostrictive transmission media 1a to 1d. . The reason for applying the bias magnetic field in this manner is to enable generation of large magnetostrictive vibration waves with a small amount of current. That is, since the electromechanical coupling coefficients of the magnetostrictive transmission media 1a to 1d are maximum at a certain bias magnetic field as shown in FIG. By doing so, magnetostrictive vibration waves can be efficiently generated. Note that the polarity of the biasing magnetic bodies 4a, 4c is opposite to that of the biasing magnetic bodies 4b, 4d.

In FIG. 1, coils 5a to 5d wound around magnetostrictive transmission media 1a to 1d are connected to magnetostrictive transmission media 1a to 1d.
It is for detecting the induced voltage due to magnetostrictive vibration waves propagating from a to 1d, and is wound over almost the entire length of the magnetostrictive transmission medium except for the above-mentioned one end, and the wound area becomes the position detection area. The winding pitch is preferably large in order to increase the induced electromotive force; for example, in this embodiment, it is set to an average of 7 turns/cm.

The winding direction of each coil 5a to 5d is the same (left-handed winding), between the end of winding of coils 5a and 5b, between the beginning of winding of coils 5b and 5c, and between coils 5C and 5d.
are connected to each other between the winding ends of the coils 5a, 5.
The beginnings of winding d are connected to the X-direction input terminals of the processor 6, respectively. That is, in this embodiment, the coils 5a to 5d are connected in series, and the polarity of the connection is reversed between adjacent coils. In addition, the coils 5a~
5d constitutes the second coil 5 in the X direction. Reference numeral 7 denotes a magnetic generator for position designation, and in this embodiment, a bar magnet with a diameter of 3 mm and a length of 50 mm is used.
In FIG. 1, an attempt is made to detect a specified position in the X direction using this bar magnet 7. Further, 8 is a transmitter that transmits an ultrasonic signal to notify the processor 6 of an instruction to start measurement, etc., and 9 is a receiver that receives this ultrasonic signal. A dual-purpose ultrasonic ceramic microphone is used for both. Note that an example of how the transmitter 8 and receiver 9 are used will be described in detail later.

Now, in FIG. 1, the position designating bar magnet 7 is
It is placed on the magnetostrictive transmission medium 1a at a distance l in the X-axis direction from the center of the coil surface of the first coil 2 in the X direction with the pole facing down. It is assumed that it has been added to the section.

In such a state, when a pulse current is applied from the X-direction pulse current generator 3 to the X-direction first coil 2, an instantaneous magnetic field fluctuation occurs in the X-direction first coil 2, which causes the magnetostrictive transmission medium to 1a-1
A magnetostrictive vibration wave is generated at the winding portion of the first coil 2 in the X direction of d. This magnetostrictive vibration wave is generated by the magnetostrictive transmission medium 1a.
It propagates along the longitudinal direction of the magnetostrictive transmission media 1a to 1d at a propagation speed specific to ~1d (approximately 5000 m/sec).
During this propagation, conversion from mechanical energy to magnetic energy is performed at a portion of the magnetostrictive transmission medium 1a to 1d where the magnetostrictive vibration wave exists, depending on the magnitude of the electromechanical coupling coefficient at that portion.
Therefore, an induced electromotive force is generated in the second coil 5 in the X direction.

FIG. 3 shows an example of a temporal change in the induced electromotive force generated in the second coil 5 in the X direction, with the time t=0 when a pulse current is applied to the first coil 2 in the X direction. As shown in the figure, the amplitude of the induced electromotive force becomes large immediately after time t=0 and around _t1 to _t2 seconds after time _t0 , and becomes small at other times. The reason why the amplitude of the induced electromotive force becomes large immediately after time t = 0 is due to the electromagnetic induction effect between the first X-direction coil 2 and the second X-direction coil 5.
The reason why the amplitude of one cycle of induced electromotive force (induced voltage due to magnetostrictive oscillating waves) becomes large from t ₁ to _{t 2} is because the magnetostrictive oscillating waves generated in the winding portion of the first coil 2 in the X direction are transferred to the magnetostrictive transmission medium 1a. This is because the electromechanical coupling coefficient becomes large at that point as it propagates to the vicinity directly below the position specifying bar magnet 7. When the position specifying bar magnet 7 is moved along the longitudinal direction X of the magnetostrictive transmission medium, the induced voltage due to the magnetostrictive vibration wave also moves on the time axis accordingly. Therefore, time t ₀
By measuring the time from t ₁ to _{t 2} , it is possible to calculate the position in the X direction designated by the position designating bar magnet 7, that is, the distance l. As the propagation time for calculating the position, for example, as shown in Fig. 3, the time _t3 is when the amplitude of the induced voltage due to magnetostrictive vibration becomes smaller than the threshold value _-E1 , and the time _t4 is when it becomes larger than the threshold value _E1 . Alternatively, the zero cross point _t5 may be used.

FIG. 4 is an explanatory diagram of the configuration of a Y-direction position detecting section used in combination with the X-direction position detecting section of FIG.
10a to 10d are magnetostrictive transmission media arranged substantially parallel to each other along the Y direction, 11 is a first coil in the Y direction commonly wound around one end of the magnetostrictive transmission media 10a to 10d, and 15 is a first coil in the Y direction. 11 by applying a pulse current to each magnetostrictive transmission medium 10a to 10d.
12a to 12d are magnetostrictive transmission media 10;
A bias magnetic material 13a that applies a bias magnetic field to the winding portion of the first coil 11 in the Y direction from a to 10d.
-13d are coils wound over a wide range of magnetostrictive transmission media 10a-10d. The winding directions of the coils 13a to 13d are all the same (left-handed winding in this embodiment).
The end of winding of coils 13b and 13c, and the end of winding of coils 13c and 13d are connected to each other, and the beginning of winding of coils 13a and 13d is connected to the Y-direction input terminal of processor 6. That is, similar to FIG. 1, the coils 13a to 13d are connected in series, and adjacent ones have opposite polarities of connection. In addition, Y by the coils 13a to 13d
A direction second coil 13 is configured.

Magnetostrictive transmission medium 10 around which the first Y-direction coil 11 and the Y-direction second coil 13 are wound in FIG.
a to 10d are the first coil 2 in the X direction and the second coil 5 in the X direction in FIG. 1, as will be detailed later.
is superposed as close as possible to the wound magnetostrictive transmission media 1a to 1d, and is used to detect the position in the Y direction specified by the position specifying magnetic generator. The structure and operation of each part are the same as those shown in FIG. 1, so the explanation thereof will be omitted.

FIG. 5 is a plan view showing an example of the structure of the detecting section of the position detecting device, and FIG. 6 is a sectional view taken along the line AA' in FIG. As shown in the figure, the X-direction second coil 5 containing the magnetostrictive transmission medium 1 is inserted into a recess provided on the inner bottom surface of the casing 60, and the magnetostrictive transmission medium 1 is placed on top of the recess.
The Y-direction second coils 13 containing 0 are overlapped and fixed with adhesive or the like as necessary.

One end of the first X-direction coil 2 and the first Y-direction coil 11 is grounded, and the other end is taken out to the outside via a conductive wire and connected to the X-direction pulse current generator 3 and the Y-direction pulse current generator 15. Further, one end of the second coil 5 in the X direction and the second coil 13 in the Y direction is grounded,
The other end is taken out to the outside through a conductor and connected to the processor 6. The bias magnetic body 4 is the magnetostrictive transmission medium 1,
Although they are fixed to the internal bottom surface of the housing 60 so as to face the ends of the magnetostrictive transmission media 1 and 10, they may be arranged in parallel above, below, and to the sides of the magnetostrictive transmission media 1 and 10. Housing 6
0 is covered with a lid 61, and the position specifying bar magnet 7 is moved on this lid 61.

FIG. 7 is a sectional view of an embodiment of the magnetic generator for position designation, and FIG. 8 is an electrical circuit diagram thereof.

The position specifying magnetic generator 40 is a pen-shaped container 4
A bar magnet 7 is attached to the tip of the pen-shaped container 41, and a wave transmitter 8 is attached to the other end, and a signal generator 42 is provided inside the bar magnet 7. It is attached to the side of the container 41 so that it can be operated from the side. When the operation switch 43 is turned on, an oscillation circuit 44 consisting of an AND circuit, an inverter, a resistor, a capacitor, etc. starts excitation and outputs a continuous pulse signal of a predetermined frequency indicating the start of measurement. The pulse signal is amplified by an amplifier 45, converted into an ultrasonic signal by a transmitter 8, and transmitted into the air. This ultrasonic signal is received by a receiver 9.

FIG. 9 is an overall perspective view of the coordinate input/output device.
In the figure, 51 is a keyboard case, and this keyboard case 51 is provided with a tablet 52 and a display 53 superimposed on each other as shown. A position signal processing device connected to the tablet 52, a position display device of the display 53, and the like are provided within the keyboard case 51.

Further, on the keyboard case 51 above the display 53, the previously described position specifying bar magnet 7 is installed.

Further, on the same mounting surface as the display 53, the keyboard case 51 has a first keyboard device 54 for inputting characters and editing instructions, such as deletion instructions.
A second keyboard device 55 is arranged for inputting numbers and editing instructions such as "clear". Note that the keyboard encoder and control device connected to each of these keyboard devices 54 and 55 are as follows.
It is built into the keyboard case 51.

Reference numeral 56 denotes a position specifying device for specifying the displacement position of characters and symbols on the display 53, and is installed on the same mounting surface as the display 53 of the keyboard case 51.

Note that as the display 53, for example, a liquid crystal display in which a liquid crystal medium is interposed between a plurality of crossed horizontal electrodes and vertical electrodes is used.

Furthermore, the keyboard devices 54 and 55 may be the same or similar to those conventionally used.

Figure 10 shows a tablet 52 and a display 53.
1 is a block connection diagram of a coordinate input/output device including keyboard devices 54 and 55, and the structure and operation will be explained below with reference to this block connection diagram.

First, when the transmitter 8 shown in FIG. 1 transmits an ultrasonic signal indicating the start of measurement, for example, a continuous pulse-like ultrasonic signal of a predetermined frequency, this ultrasonic signal is received by the receiver 9. This is converted into a continuous pulse electric signal and sent to the output buffer circuit 21 via an amplifier, waveform shaper, etc. The computer 22 reads the continuous pulse signal from the output buffer circuit 21 via the controller 23 and recognizes the start of measurement.

Furthermore, the controller 23 clears the counter 24 based on the output of the computer 22 based on this continuous pulse signal, and the counter 24 starts counting the clock pulses of the clock oscillator 25 (pulse repetition frequency is, for example, 100 MHz).
At the same time, the above output of the computer 22 starts operating the X-direction pulse current generator 3 and the Y-direction pulse current generator 15 via the input buffer circuit 26, and these are the first coil 2 in the X direction and the first coil 2 in the Y direction. A pulse current is applied to the first coil 11.

X-direction second coil 5 and Y-direction second coil 1
3, an induced electromotive force is generated by the magnetostrictive vibration waves, and by bringing the position specifying bar magnet 7 close as described above, it is observed as a large vibration amplitude wave, which is transmitted to the pulse detector 27 via a multiplexer etc. ,2
8 is input. Here, if the induced electromotive force due to the input magnetostrictive vibration wave is shown as, for example, the symbol a in _FIG . While the value is greater than ₁ , that is, when the positive polarity portion of the induced voltage due to the magnetostrictive vibration wave is detected, the counter 24 stops its counting operation.

In this way, when an induced voltage due to magnetostrictive oscillation waves appears in the second coil 5 in the X direction and the second coil 13 in the Y direction, the counter 24 stops counting, so the time elapsed from the generation of the first clock pulse is counted as a pulse. You can know by Also, this value is determined by the first coil 2 in the X direction and the first coil 2 in the Y direction, since the magnetostrictive vibration wave travels at a speed of approximately 5000 m/s.
This corresponds to the distance from the coil 11 to the position specifying magnetic body 7 in the X direction and the Y direction. In this way, each direction data given as a digital value is inputted to a digital display or the like via the output buffer circuit 21 and displayed, or inputted to the computer 22 and processed.

On the other hand, as described above, position data consisting of X-direction data and Y-direction data instructed one after another on the tablet 52 is input to the computer 22 and then arranged in a certain order in the display memory 29. At the same time, the position data is sequentially read out by timing pulses from a controller 30 serving as a display processor and output to an X-direction driver 31 and a Y-direction driver 32.

Further, scanning pulses generated by a scanning pulse generator 33 are inputted to these X direction driver 31 and Y direction driver 32 in synchronization with the timing pulse of the controller 30.
Each of the drivers 31 and 32 inputs the position data in the X and Y directions to the display 53, and therefore displays the indicated position on the tablet 52 at the same position on the display 53. That is, the handwriting of characters and figures written on the display 53 stacked on the tablet 52 using the bar magnet 7 for specifying the position is displayed as the same handwriting on the display 53 by optical display. Therefore, if a character editing device is provided between the display 53 and the computer 22, it becomes possible to modify the characters input on the tablet 52 and display them on the display 53, and to edit the text such as adding and deleting. .

In this way, the display 5 is displayed on the tablet 52.
3, the position on the tablet 52 can be specified using the magnetic generator 7 for specifying the position on the top of the display 52, which is away from the tablet 52, and the specified position can be placed on the same part on the display 53.
Since it can be displayed instantly, documents can be easily created while monitoring the display on the display 53 and considering the handwriting and layout.

Further, since no cord is connected between the position specifying magnetic generator 7 and the main body of the apparatus, inputting characters and figures becomes extremely easy.

Furthermore, even if reinforcing members made of metal plates such as aluminum or copper are installed on the stacked tablets 52, if the strength of the magnetic field emitted by the position specifying magnetic generator 7 is selected, the strength of the magnetic field generated by the position specifying magnetic generator 7 can be adjusted. You can specify the position without any problems.

Furthermore, since the display 53 is located above the tablet 52, unlike the past, parallax is not imparted to the scribe, and the operability does not feel strange.

Since the tablet 52 and the display 53 are integrated, the output configuration displayed on the display 53 and the input configuration of the tablet 52 can be changed to any size (for example, from A4 to A5) while maintaining the same shape.

Because of these features, no skill is required to operate it, and it is very easy for the operator to get used to it. In addition, it allows you to create sentences in an attractive manner, which is extremely useful when used for desk work.

On the other hand, the keyboard devices 54 and 55 are connected to the computer 2 via the keyboard encoder 57.
2, each keyboard device 54, 5
The English characters, Japanese characters, instruction contents, and numbers input in step 5 are converted into digital signals convenient for calculations and input into the computer 22.

Further, the computer 22 converts these digital signals into display signals, temporarily stores them in the display memory 29, and then displays them on the display 53 every moment at the timing of the scanning pulse. Further, a digital signal of position data outputted by operating the position specifying magnetic generator 7 or position specifying device 56 on the tablet 52 described above is inputted to the computer 22, and is displayed on the display 53 of the above-mentioned characters and symbols. Can be positioned.

If the computer 22 is equipped with a switch circuit, the display 5 can be selectively switched between the characters and figures drawn on the tablet 52 and the characters input using the respective keyboard devices 54 and 55.
3 can be displayed on top.

Furthermore, by connecting a speech synthesizer 58 and a speaker 59 to the computer 22 and attaching the speaker 59 to the keyboard case 51 as shown in FIG. and each keyboard device 5
The characters, words, and numbers specified in steps 4 and 55 can be heard as speech from the speech synthesizer based on the output of the computer 22. In other words, the characters, etc. that the operator sees with his eyes and inputs manually can be confirmed with his ears by the sound emitted from the speaker.
Therefore, errors in instructions and commands can be prevented, and recording and editing work can be made more efficient.

(Effects of the Invention) As explained above, according to the present invention, a plurality of X-direction magnetostrictive transmission media arranged substantially parallel to each other and a plurality of Y-direction magnetostriction transmission media arranged substantially parallel to each other are arranged. The X-direction first coil and the plurality of Y-direction magnetostrictive transmission media have a configuration in which they are superimposed so as to intersect substantially perpendicularly to each other, and are wound around one end of the plurality of X-direction magnetostrictive transmission media. a first coil in the Y direction wound around one end; a second coil in the X direction wound around almost the entire length of the plurality of magnetostrictive transmission media in the X direction except for the one end; A tablet having a second coil formed of a second Y-direction coil wound over substantially the entire length of a plurality of Y-direction magnetostrictive transmission media except for the one end; and a local electric machine of the magnetostrictive transmission media. A magnetostrictive generator for position designation that generates magnetism to a degree that increases the coupling coefficient and is not connected to any part, and a pulse current applied to one of the first coil or the second coil to apply magnetostriction to each of the magnetostrictive transmission media. a pulse current generator that generates vibration waves;
By detecting the time from the generation of the magnetostrictive vibration wave until the induced voltage by the magnetostrictive vibration wave appears in the other of the first coil or the second coil,
Since the coordinate input device is equipped with a processor that obtains position data in the X and Y directions of the specified position by the position specifying magnetic generator, the position specifying magnetic generator can be used at the timing for position detection. There is no need to send signals, etc. to the device, and the connection between the device and the device can be made cordless, and the cord will not break, become tangled, or become loose due to fatigue, thus improving operability. The magnetic generator for position specification can be easily moved to any position, and the position can be specified by changing the electromechanical coupling coefficient of the magnetostrictive transmission medium by several Oe only in a certain part. It is not necessary to place the magnetic generator near the tablet.
They may be separated by a distance of several centimeters or more, or an object other than a magnetic material, in this case a display, may be interposed, and even in these cases, the position can be detected with high resolution.

In addition, a display is superimposed on the tablet, and a keyboard device for inputting characters and symbols is provided integrally with the coordinate input device, so that characters and symbols inputted from the keyboard device are placed at positions corresponding to the position data on the display. Since the structure is configured to display symbols, there is no need to move your head to look at the tablet and display alternately as if they were two separate devices. There is almost no parallax, and input operations can be performed with an extremely natural feeling.Also, positions can be specified when correcting or inserting characters by operating a magnetic generator for specifying positions on the display. Furthermore, characters, symbols, etc. can be input not only from the tablet but also from the keyboard device, and therefore, effects such as extremely efficient work can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of the X-direction position detection section in an embodiment of the present invention, FIG. 2 is a characteristic diagram of magnetic bias versus electromechanical coupling coefficient, and FIG. 3 is an induction generated in the second coil 5 in the X-direction. A line diagram showing an example of a temporal change in electromotive force. FIG. 4 is a configuration explanatory diagram of a Y-direction position detecting section used in combination with the X-direction position detecting section of FIG. 1. FIG. 5 is a diagram showing the detection of the position detecting device. 6 is a sectional view taken along line A-A' in FIG. 5, FIG. 7 is a sectional view of an embodiment of the magnetic generator for position designation, and FIG. FIG. 9 is a partially cutaway perspective view schematically showing the coordinate input device, and FIG. 10 is a block circuit diagram of the coordinate input/output device. 1a, 1b, 1c, 1d... magnetostrictive transmission medium,
2, 11... First coil, 5, 13... Second coil, 10a, 10b, 10c, 10d... Magnetostrictive transmission medium, 52... Tablet, 53... Display, 54, 55... Keyboard device , 56
...Positioning device.

Claims (1)

[Claims] 1. A plurality of X-direction magnetostrictive transmission media arranged substantially parallel to each other and a plurality of Y-direction magnetostriction transmission media arranged substantially parallel to each other are superimposed so as to intersect each other substantially perpendicularly. a first X-direction coil wound around one end of the plurality of X-direction magnetostrictive transmission media, and a Y-direction first coil wound around one end of the plurality of Y-direction magnetostriction transmission media. a first coil consisting of one coil, a second X-direction coil wound over almost the entire length of the plurality of X-direction magnetostrictive transmission media except for the one end, and a plurality of
a second coil in the Y direction wound over almost the entire length of the magnetostrictive transmission medium except for the one end; and a local electromechanical coupling coefficient of the magnetostrictive transmission medium. A magnetostrictive vibration wave is applied to each of the magnetostrictive transmission media by applying a pulse current to a position specifying magnetic generator that generates a large amount of magnetism and is not connected to any one of the first coil or the second coil. The position specification is performed by using a pulse current generator to generate the pulse current, and by detecting the time from when the magnetostrictive vibration wave is generated until the voltage induced by the magnetostrictive vibration wave appears in the other of the first coil or the second coil. A coordinate input device is equipped with a processor that obtains position data in the X and Y directions of a specified position using a magnetic generator, and a display is superimposed on the tablet, and a keyboard device for inputting characters and symbols. A coordinate input/output device, characterized in that: is provided integrally with the coordinate input device, and is configured to display characters and symbols input from the keyboard device at positions corresponding to the position data on the display.