JPS62219121A - Electronic blackboard device - Google Patents

Abstract

PURPOSE:To change suitably the position of a blackboard part and to use it without restraining the electronic blackboard part by a control part by making variable the positional relationship between the electronic blackboard part and the control part. CONSTITUTION:At the time mutual joining part of an electronic blackboard part 3 and a control part 1, in order to connect electrically these mutual sections, a pair of the first input output edge parts 50A and 50B is provided at the electronic blackboard part 3 side and a pair of the second input output edge parts 51A and 51B are provided at the control part 1 side respectively. The input output edge parts 50A and 50B are mutually of the same structure, glided to a side surface recessed part 52 of the electronic blackboard part 3, fitted at a spring 53, the tip is finished in a taper shape, and when a force is applied to the taper surface or the tip, the parts are pushed in against the spring 53.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic blackboard device that converts the position of a writing instrument or the like by hand VJ operation into an "up air signal".

(Prior art) Conventional devices of this type have a method in which, while winding up the content written on the writing surface of a roll-up sheet, the writing surface is illuminated with light and the reflected light is read by an image sensor or the like. There are some that have a flexible writing surface and a position detection section made of pressure-sensitive rubber in a matrix on the back side of the writing surface, and detect the position of the writing pressure from the detected voltage. In such a structure, it is necessary to prevent the roll-up sheet from deforming when writing, and in the case of a pressure-sensitive sheet, if
There was also the problem that the weight increased due to the reinforcement structure, such as providing deformation strength against (1).

Therefore, the present applicant has filed Japanese Patent Application No. 61-2736 and Japanese Patent Application No. 6
No. 1-13515 provides technology related to a digitizer type electronic blackboard device using magnetostrictive waves, making it lighter and smaller.
Achieved slender form. In this electronic blackboard device, one side of the electronic blackboard section is a writing surface made of non-magnetic material, and the back side is
As a position detection tablet, magnetostrictive transmission media are arranged in a mesh pattern in the X and Y directions, and each of the magnetostrictive transmission media is wound with a detection coil over almost its entire length. A magnetostrictive signal is given from one predetermined end side of each of X and Y at any time and transmitted to the other end, and when a writing instrument equipped with a magnetic generator comes into contact with the writing surface, it is magnetically biased at the corresponding contact position, A position coordinate detection signal is generated in the detection coil, and the control section calculates one coordinate for that position.

(Problems to be Solved by the Invention) However, in the above-mentioned digitizer type electronic whiteboard device, the electronic whiteboard section and the control section are fixed to a common leg, etc., so the ease of use of the electronic whiteboard section is was not always satisfactory.

(Means for solving the problem) In the present invention, in order to solve the above problem, when a writing instrument equipped with a magnetic generator comes into contact with a writing surface, a magnetic bias is generated at the corresponding contact point. an electronic blackboard unit equipped with a position detection tablet that outputs a position coordinate detection signal; and a control unit that drives the position detection tablet and receives the detection signal to calculate the position coordinates. In the blackboard device, a first input/output end on the electronic blackboard side and a second input/output end on the control unit side are provided as input/output ends related to driving and detection signals of the position detection tablet, The mutual positional relationship between the electronic whiteboard section and the control section is made variable, and the first input/output end section and the second input/output end section are arranged so that the mutual positional relationship between the electronic whiteboard section and the control section is changed as the positions of the electronic whiteboard section and the control section change. It was configured to be connected to.

(Function) According to the present invention, the positional relationship of the electronic whiteboard section with respect to the control section is variable, and when the positional relationship is changed, the first input/output end on the electronic whiteboard side and the control section The second input/output end on the side is connected accordingly, and the control function as an electronic whiteboard device is maintained.

(Embodiment) FIG. 1 is an external view of an electronic whiteboard device showing a first embodiment of the present invention. Reference numeral 1 denotes a control section, which is fixed to a leg section 2. As shown in FIG.

3 is an electronic blackboard section, which has l,
It is supported by the II t111 part 1 and the leg part 2, and is rotatable about the support shafts 4A and 4B as rotation axes, and as a result of the rotation, the front and back surfaces of the electronic blackboard part 3 are alternately rotated as shown in the figure. I try to make it come to the front. 5 is an outer frame of the electronic whiteboard section 3.

The basic internal configuration of the electronic whiteboard section 3 is based on patent application No. 1 (61-
It is the same as that in No. 2736, and with reference to the cross-sectional view in FIG.
, 7B is the installation. The top plates 7A and 7B are made of a non-magnetic material such as aluminum or austenitic stainless steel, and each surface has an enameled flat surface, and each surface can be written with a marker or erased with an eraser. Used repeatedly in writing. Between the base materials 6A and 6B, a first magnetostrictive transmission medium assembly 8 shown in FIG. 3 and a second magnetostrictive transmission medium assembly 9 not shown in FIG. It is installed by sandwiching it.

One of the plurality of position detecting bodies 11 in a3 in FIG. 3 is shown in FIG. ,
It consists of a coil 14 and the like for extracting an induced voltage based on the magnetostrictive imaging wave of the first magnetostrictive transmission medium 12.

The mounting plates 15Δ and 15B are fixed to the support plate 16.

In these assembled states, the first magnetostrictive transmission media 12 are parallel to each other, and the set forms a flat first array layer.

The excitation coil 17 is wound around each end of the first magnetostrictive transmission medium 12 so that each magnetostrictive transmission medium 12 is commonly excited. The bias magnet 18 is connected to the coil 1
A bias magnetic field is applied to the magnetostrictive transmission medium 12 near C to increase the electromechanical coupling coefficient in the magnetostrictive transmission medium 12, so that a small current C generates a large magnetostrictive imaging wave.

The second magnetostrictive transmission medium assembly 9 has the same structure as the first magnetostrictive transmission medium assembly 8, and is overlapped using a spacer 10 as shown in FIG. Each of the members 20 to 26, such as the position detection body 19, is the same as each of the members 12 to 18, so a description thereof will be omitted. In addition, the part comprised by these members 12-18 and 20-26 is called the position detection tablet.

FIG. 6 shows each assembly 8 of the magnetostrictive transmission medium shown in FIG. 1 and the second magnetostrictive transmission medium.
9 is assembled into each layer as shown in FIG. 2,
The position detectors 8 are arranged so that their stripes are in the X direction of the writing surfaces 7A, 7B, and the position detectors 9 are arranged in the Y direction, and these cover almost the entire area of the writing surfaces 7A, 7B. Try to cover it.

As shown in FIG. 7(A), the writing instrument 27 houses a commercially available marker 29 in a case 28 made of non-magnetic metal, and a hollow truncated cone-shaped position detection magnet 30 is attached to the core of the marker 29. 31 is inserted through the core body 3, and the magnetic flux flows through the core body 3.
The magnetostrictive transmission medium 12.20 is reached toward the tip of the core of the magnetostrictive medium 12.20.

The light emission control section 32 includes a battery and a light emitting element (both not shown).
During a writing operation, when the core 31 is pressed and the switch 33 is activated, modulated infrared rays unique to the writing instrument are radiated in all directions from the light emitting window 34.

As shown in FIG. 7(B), the eraser 35 is equipped with a battery and a light emission control section (both not shown) in a case 36 made of synthetic resin, and an erase member 37 such as a sponge below. Both ends 38A.

38B is provided with position detection magnets having the same function as the magnet 30 in FIG. When each end 3BA or 38B is pressed, the switch on the pressed side is activated, and infrared rays modulated corresponding to each switch are emitted from the two windows 39 provided in the case 36. irradiation, or when both are pressed at the same time, irradiation with infrared rays modulated accordingly.

FIG. 8 is a block diagram of the control related to the υ control section 1, and the main control section 40 controls this device in an integrated manner. The electronic whiteboard section 3 has a top board 7A.

7B, an infrared receiving section 41A shown in FIG.

41B, 41G, and 410 are provided to receive infrared rays emitted from the writing instrument 27 or the eraser 35. Signals from these light receiving sections 41A to 41D are sent to the main control section 40.
sent to.

The counter 42 selectively receives the induced voltage of the coil 14 or 22 of the electronic blackboard section 3 via the multiplexer/amplifier section 43, and receives the induced voltage of the coil 17 for X@excitation or the coil 25 for Y-axis excitation. The pulses of the cock pulse oscillator 44 are measured from the time of excitation to the time of generation of induced voltage by the position detection magnet 30 or the like.

Based on a command from the main control unit 40, the blackboard control unit 45 controls the X-axis excitation coil 17 and the Y-axis excitation coil 25 at predetermined intervals while the writing instrument 27 or the eraser 35 is being operated (during light reception). The output of the multiplexer/amplifier section 43 is switched to the corresponding one (14 or 22) corresponding to the excitation, and the count value of the counter 42 is provided to the main control section 40 each time.

The main control unit 40 determines the position of the position detection magnet 30 etc. from the counted value, the natural frequency of the clock pulse oscillator 44, and the propagation speed of the magnetostrictive vibration waves in the magnetostrictive transmission media 12 and 20. Regarding the axis, calculations are performed based on the f-value from the coil 14, and regarding the Y-axis, calculations are performed based on data from the coil 22.

When writing is in progress, the infrared receivers 41A to 41D receive infrared light indicating that writing is in progress.

When the position detection magnet 30 moves as you write, the position coordinates also change sequentially. Di G> and accumulated.

The same applies when the eraser 35 is operated, and the eraser 3
5 is in use, the appearance of the used part is sequentially screened, and the corresponding coordinate value among the accumulated coordinate values is deleted. The remaining coordinate values that have been input or deleted in this way are displayed on the display unit 46, recorded as a hard copy on the printer 47, or output to another device via a telephone line, etc., as necessary. be done.

Note that the eraser 35 in this case is provided with two magnets for position detection, and when both of them are in contact with the writing surface of the top plate 4, the main control unit 40 moves these two parts according to the above. Determine the position of a straight line connecting each part from the coordinate values of I am trying to clear the value.

At the joint between the electronic whiteboard section 3 and the control section 1, a pair of first input/output ends 50A are provided on the electronic whiteboard section 3 side in order to electrically connect them.

50B, and a pair of second input/output ends 51A, 51B on the control section 1 side. Input/output end 5
0A and 50B have the same structure, and the 9th
As shown in the figure (A>), it is slidably fitted into the side recess 52 of the electronic whiteboard section 3 and attached to a spring 53, whose tip is finished in a tapered shape, and force is applied to the tapered tip or tip. It is pushed in against the spring 46.

The input/output ends 51A and 51B have the same structure and have flat ends as shown in FIG. 9(B). The input/output ends 5OA and 50B are, for example,
In the state shown in FIG. 1, each input/output end 51A and 51B
The electronic blackboard part 3 is brought into contact with the support shaft 4 and is pressed against the support shaft 4.
When rotated 180 degrees around A and 4B, the input and output ends 51B and 51A come into contact with each other and are pressed against each other. Each of the input/output ends 50A, 50R, 51A, and 51B has four electrode contacts A-D in order to connect the electronic whiteboard section 1 and the control section 3 to each other in the press-contact state. , the arrangement relationship is shown in FIG. Contacts A, B, C and contacts A', B', C' are commonly connected to each other,
The excitation of each excitation coil 17.25 and each detection signal in the X direction and the Y direction are mutually transmitted. Since the origin of the coordinate system in the Y direction changes depending on the rotational position of the electronic whiteboard section 3,
In order for the control section 1 to detect this, the electronic whiteboard section 3 determines the rotational positional relationship of 180 degrees between the contact point D' and the contact point D', and transmits the information to the contact point D'.

Depending on the determination signal D', the origin in the Y direction is mutually converted to the top or bottom of FIG.

FIG. 10 shows a second embodiment, in which input/output ends 60 and 61 similar to those shown in FIG.
are provided at one end in the longitudinal direction and the control part 1 and are connected to each other, in this case, the leg part 2 has a structure that can be expanded and contracted in the lateral direction,
It is also possible to use the electronic whiteboard section 3 in a vertically elongated orientation, or alternatively, prepare several electronic whiteboard sections 3 of different sizes and use them interchangeably with the control section 1 in common. You can also do that.

FIG. 11 shows a third embodiment, in which first and second electrodes are connected to the electronic blackboard section 3 and the control section 1 for connecting each electrode.
Adapters 70 and 71 are provided as input/output ends of the electronic whiteboard section 3 and the control section 1 are arranged separately by connecting them to each other with electric wires 72.

(Effects of the Invention) As explained above, according to the present invention, since the positional relationship between the electronic whiteboard section and the control section is made variable, the electronic blackboard section is not so restricted by the control section. , it becomes possible to use it by changing the position appropriately.

[Brief explanation of drawings]

FIG. 1 is an external view of an electronic blackboard device showing a first embodiment of the present invention, FIG. 2 is a structural sectional view of the electronic blackboard section, and FIG.
1if1 strain transmission medium, FIG. 4 is a diagram not showing the assembly of the second magnetostriction transmission medium, and FIG. 5 is a structural diagram of the position detection body.
Figure 6 is a diagram showing the assembled state of the first and second IN detectors, Figure 7 (A) is a structural diagram of the writing instrument, Figure 7 (B) is a structural diagram of the eraser, and Figure 8 is A block diagram of the control circuit, FIG. 9(Δ)(B) is a structural cross-sectional view of the input/output end, FIG. 10 is an external view of the electronic blackboard device showing the second embodiment, and FIG. 11 is the third embodiment. FIG. 1 is an external view of an electronic whiteboard device showing an example. 1... Control unit 3... Electronic whiteboard section 50A, 508.60... Input/output end 70... Adapter (first input/output end) 51A, 518.61... Input/output end Section 71...Adapter (second input/output end)

Claims (1)

[Scope of Claims] An electronic blackboard unit equipped with a position detection tablet that outputs a position coordinate detection signal of a magnetic bias generated at a corresponding contact point when a writing instrument equipped with a magnetic generator comes into contact with a writing surface; In an electronic whiteboard device comprising a control unit that drives the position detection tablet and calculates the position coordinates in response to the detection signal, the electronic whiteboard serves as an input/output terminal related to the drive of the position detection tablet and the detection signal. a first input/output end on the blackboard side and a second input/output end on the control unit side, the mutual positional relationship between the electronic whiteboard and the control unit is variable; An electronic whiteboard device, wherein the input/output end and the second input/output end are connected to each other as the positions of the electronic whiteboard section and the control section are changed.