JP2001228965A - Coordinate reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coordinate reader in which conducting wires are linearly arranged by preventing disconnection and slack of the conducting wires and the mounting work of the conductive wires is easily performed. SOLUTION: The conducting wires 26a can be linearly arranged on a supporting substrate 24 since a sense coil 23 is constituted by using separate parallel conducting wires 26 formed by integrated two conducting wires 26a arranged side by side at a prescribed interval by coating them with a belt-like insulator. The disconnection and slack of the conducting wires 26a are prevented since excess force is hardly applied to the conducting wires 26a themselves even when temperature changes and the slack is generated in the supporting board 24 when the separate parallel conducting wires 26 are used. In addition, the mounting work of the separate parallel wires 26 to the supporting substrate 24 is facilitated in comparison with the case that a plurality of conducting wires are directly mounted to the supporting board 24 as in the conventional manner since the separate parallel conducting wires 26 are mounted to the supporting board 24 by the engagement of a through hole 26c to pass through the belt-like insulator with a supporting projection 24a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coordinate reading device for detecting a signal generated in a conducting wire by an alternating magnetic field generated by a coordinate input device and reading the position coordinates of the coordinate input device.
In particular, the present invention relates to a coordinate reading apparatus that can prevent a conductor from being broken or loosened, can arrange the conductor in a straight line, and can easily attach the conductor.

[0002]

2. Description of the Related Art In a coordinate reading device used for an electronic blackboard or the like for electrically reading written characters and figures,
In order to detect a signal generated by an alternating magnetic field generated by the coordinate input device, a plurality of conductive wires are arranged in a grid pattern on the supporting base material so as to be orthogonal to the vertical and horizontal directions. In the conventional coordinate reading device, these conductors are directly attached to the supporting base material one by one, so that a tension is applied to the conductors in order to arrange the conductors linearly. I have.

[0003]

However, when a plurality of conductors are directly attached to the supporting substrate one by one as described above, not only special measures such as applying tension to the conductors but also special measures are required. Due to the temperature change and the deflection of the supporting base material, excessive force may be applied to the conductor, and the conductor may be broken or the conductor may be loosened. In other words, when the conductor is broken, the coordinate position cannot be detected even if an alternating magnetic field is generated from the coordinate input tool, and when the conductor is loosened, the coordinate position detection error increases. is there. Furthermore, when a plurality of conductors are directly attached to the support base one by one, there is a problem that the work of attaching the conductors is troublesome and the production cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to arrange conductors in a straight line while preventing the conductors from being broken or loosened, and to facilitate the operation of attaching the conductors. It is an object to provide a coordinate reading device.

[0005]

In order to achieve this object, a coordinate reading apparatus according to the present invention detects a coordinate input device for generating an alternating magnetic field and a signal generated by the alternating magnetic field generated by the coordinate input device. A plurality of conductors arranged in the vertical and horizontal directions, a supporting base material for attaching the plurality of conducting wires, and a covering base material for covering the conducting wires with respect to the supporting base material. In addition, the conductors are spaced apart parallel conductors that are attached to the supporting base material in the vertical and horizontal directions while being held at predetermined intervals via a band-shaped insulator.

According to the coordinate reading apparatus of the present invention, the plurality of conductive wires are held at predetermined intervals via the band-shaped insulator, and are attached to the supporting base material in the vertical and horizontal directions. The parallel conductor detects a signal generated by an alternating magnetic field generated by the coordinate input device.

According to a second aspect of the present invention, there is provided a coordinate reading apparatus.
In the coordinate reading device described above, a through-hole penetrating through a strip-shaped insulator constituting the spaced parallel conductor, and a surface of the support substrate on the mounting surface side of the spaced parallel conductor that is engageable with the through hole. And a supporting projection protruding from the supporting member.

[0008] According to the coordinate reading device of the second aspect, it operates in the same manner as the coordinate reading device of the first aspect.
The separated parallel conductor is attached to the support base by engaging a through-hole penetrating through the strip-shaped insulator with a support projection protruding from a surface of the support base on the side of the separation parallel lead attachment surface. Is done.

According to a third aspect of the present invention, there is provided a coordinate reading apparatus.
In the coordinate reading device described above, the length of the through hole in the axial direction of the spaced parallel conductor is formed to be longer than the length of the support protrusion in the axial direction of the spaced parallel conductor, and the length in the axis orthogonal direction of the spaced parallel conductor is The width of the through hole is substantially equal to the width of the support protrusion in the direction perpendicular to the axis of the separated parallel conductor.

According to a fourth aspect of the present invention, there is provided a coordinate reading apparatus.
In the coordinate reading device according to any one of (1) to (3), a groove having a width substantially equal to the width of the separated parallel conductor is formed on a surface of the support base on the attachment surface side of the separated parallel conductor.

According to the coordinate reading device of the fourth aspect, in addition to the same operation as the coordinate reading device of any one of the first to third aspects, the separated parallel conducting wire is the same as the separated parallel conducting wire on the supporting base material. It is fitted in a groove having a width substantially the same as the width of the separated parallel conductive wire formed on the surface on the mounting surface side.

According to a fifth aspect of the present invention, there is provided a coordinate reading apparatus according to the fourth aspect.
In the coordinate reading device described above, the depth of the groove formed in one direction of the vertical direction or the horizontal direction is greater than the depth of the groove formed in another direction orthogonal to the direction, and the depth of the spaced parallel conductive wire is larger than that of the groove. Is formed deeper than the thickness of the substrate.

According to a sixth aspect of the present invention, there is provided a coordinate reading apparatus according to the first aspect.
In the coordinate reading device according to any one of to 5, the surface of the coated base material on the side of the support base material has a height substantially equal to the distance from the surface of the coated base material to the surface of the separated parallel conductive wire. Are protruded along the spaced parallel conducting wire.

According to the coordinate reading device of the sixth aspect, the coordinate reading device of the present invention operates in the same manner as the coordinate reading device of any one of the first to fifth aspects. On the surface of the coated base material on the side of the support base material side, the holding projection is provided so as to have a height substantially equal to the distance from the surface of the coated base material to the surface of the separated parallel conductor, and is substantially adhered to the support base material side. .

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A coordinate input device according to the present invention will be described below with reference to an electronic blackboard 1 as a preferred embodiment. The electronic blackboard 1 here is a writing panel 1 that is a receiving unit by a pen 60 that is a coordinate input device that is a transmitting unit.
0 on the writing surface 21a of the pen 60 for writing handwritten characters and figures on the writing surface 21a and generating an alternating magnetic field.
The position at the upper position is magnetically coupled by a receiving unit having a plurality of sense coils 23 laid on the writing panel 10 to read the position coordinates.

FIG. 1 is an external perspective view showing the main structure of an electronic blackboard 1 according to the present embodiment. As shown in FIG. 1, the electronic blackboard 1 includes a pen 60 as a transmitting unit and a writing panel 10 as a receiving unit. The electronic blackboard 1 includes a writing panel 10 and a pen 60 for writing on the writing surface 21a.
And an eraser 40 for erasing a written trajectory and data indicating the trajectory. The pen 60 and the eraser 40 include a coil, an oscillation circuit, and a battery (not shown) for generating an alternating magnetic field.

The writing panel 10 has a frame-like frame 11
The frame 11 incorporates a writing panel main body 20. A plate-like base 12 is attached to the lower end of the front surface of the frame 11 along the lower end so as to project to the front surface. On the upper surface of the table 12, a pen 60
Stand-shaped recesses 12a for accommodating the
Is formed. On the right side of the concave portion 12a, a flat portion 12b for placing the eraser 40 and the like is formed.

A battery case 14 for accommodating four C-size batteries 14a serving as a power source of the electronic blackboard 1 is provided at a lower portion of a front surface of the frame 11, and a lid 14b is opened and closed on the front surface of the battery case 14. Mounted as possible. On the right side of the battery case 14, a volume control knob 13c of the speaker 31 described later is provided, and on the right side thereof, a personal computer 100 (hereinafter abbreviated as PC) and a printer 200 described later.
(See FIG. 2) Connectors 13b, 13a for connection
Is provided. Metal fittings 15, 15 for hanging the electronic blackboard 1 on a wall are provided at both ends at the upper end of the rear surface of the frame 11.
Is attached.

On the front right side of the frame 11, an operation unit 30 is provided.
Is provided. The operation unit 30 includes a speaker 31 for reproducing sounds such as an operation sound and a warning sound, and data indicating the contents written on the writing surface 21a (hereinafter, abbreviated as writing data).
, A page number display LED 32 for displaying the number of pages storing 7 by a 7-segment LED, a page return button 33 for returning one page each time the button is pressed, a page forward button 34 for feeding one page each time the button is pressed, and a stored handwriting. An erase button 35 that erases one page each time data is pressed;
A printer output button 36 pressed to output the stored writing data to the printer 200 (see FIG. 2);
A PC output button 37 that is pressed to output the stored writing data to the PC 100 (see FIG. 2), a dead battery notification LED 39 that reports that the battery of the pen 60 is dead, and a push to activate the electronic blackboard 1 A power button 38 is provided.

FIG. 2 is an explanatory diagram showing a state in which the PC 100 and the printer 200 are connected to the electronic whiteboard 1. As shown in FIG. 2, the connector 13b is connected to a plug 202 of a connection cable 204 connected to the printer 200, and the connector 13a is connected to a plug 102 of a connection cable 104 connected to the PC 100. That is,
The writing data indicating the content written on the writing surface 21a of the electronic blackboard 1 is output to the PC 100, and the content written on the electronic blackboard 1 can be viewed on the monitor 103 provided in the PC 100. The handwriting data is output to the printer 200, and the contents written on the electronic blackboard 1 are printed on a printing paper 203.
Can also be printed.

The structure of the writing panel main body 20 will be described with reference to FIG. FIG. 3 is an exploded perspective view showing each component of the writing panel main body 20. Writing panel body 20
Is a writing sheet 21 having a writing surface 21a formed of a PET (polyethylene terephthalate) film.
A plate-shaped covering base material 22 covering the surface of a support base material 24 to be described later, a plate-shaped support base material 24 on which a sense coil 23 is laid, and a plate-shaped bag for protecting the back surface of the support base material 24. This is a structure in which panels 25 are sequentially stacked.

Referring to FIG. 4, the configuration of sense coil 23 will be described. FIG. 4A is an explanatory view showing a configuration of the sense coil 23 with a part thereof being omitted, and FIG.
FIG. 4 is an explanatory diagram showing the width and the overlapping pitch of the sense coils 23 shown in FIG. In the following description, among the sense coils 23, the sense coils arranged in the X-axis direction are referred to as X coils, and the sense coils arranged in the Y-axis direction are referred to as Y coils. As shown in FIG. 4A, m X coils X1 to Xm for detecting the X coordinate of the (X, Y) coordinates of the pen 60 and the eraser 40 are arranged in the X-axis direction. In the Y-axis direction, n coils Y1 to Yn for detecting the Y coordinate are arranged orthogonally to the X coil. The X coil and the Y coil form a single-turn coil each having a substantially rectangular shape.

As shown in FIG. 4 (b), the length of the short side of the rectangular portion of the X coil is formed to have a width P1, and adjacent X coils have a pitch of one half of the width P1. Each is overlaid. Each of the Y coils is also formed to have a width P1, and adjacent Y coils are each overlapped at a pitch of approximately half the width P1.

Referring to FIG. 5, the details of the support base material 24 constituting the writing panel main body 20 will be described. FIG.
FIG. 3 is a perspective view showing a front side of a support base material 24. As shown in FIG. 5, on the surface of the support base material 24, a large number of support projections 24a for attaching a separated parallel conductive wire 26 described later are projected. The support protrusions 24a are formed in a columnar shape having a substantially rectangular cross section, and the support protrusions 24a are alternately arranged in the longitudinal direction (long side direction) in the vertical direction and alternately in the horizontal direction. It is arranged to become.

Referring to FIG. 6, the structure of the separated parallel conducting wire 26 attached to the surface of the support base 24 will be described. FIG. 6 is a perspective view of the separated parallel conductive wire 26 showing a partial cross section. As shown in FIG. 6, the separated parallel conducting wire 26 is constituted by two conducting wires 26a arranged in parallel at a predetermined interval. The two conductors 26a are each formed of copper, and the periphery thereof is covered with an insulating film 26b1 formed of a flexible resin, for example, vinyl enamel. The insulating film 26b1 that covers each of the two conductive wires 26a is integrated by a band-shaped insulating layer 26b2 formed of a resin having the same flexibility, for example, vinyl enamel, and the insulating film 26b1 and the insulating layer 26b2 are integrated.
These form an insulator 26b having an eyeglass-shaped cross section.

The strip-shaped insulating layer 26 constituting the insulator 26b
At b2, substantially rectangular through holes 26c are formed at predetermined intervals in the axial direction of the separated parallel conducting wires 26. This through hole 26
The interval of c corresponds to the interval in the longitudinal direction (long side direction) of the support protrusion 24a protruding from the surface of the support base material 24 described above.

Referring to FIG. 7, a state in which the parallel parallel conductor 26 is attached to the surface of the support base 24 will be described. FIG.
FIG. 5 is a front view of the front side of the support base material 24 in a state where the separated parallel conductive wires 26 are attached. As shown in FIG. 7, the through-holes 26 c of the spaced parallel conductive wires 26 are engaged with the plurality of support protrusions 24 a protruding from the surface of the support base material 24, so that the separated parallel conductive wires 26 are connected to the support base material 24. Is attached to each. Separated parallel conductive wires 26 are vertically attached to the support projections 24a arranged in the longitudinal direction (long side direction) in the vertical direction, while being arranged in the longitudinal direction (long side direction) in the horizontal direction. The separated parallel conducting wire 26 is horizontally attached to the supporting projection 24a.

In the vicinity of the edge of the support substrate 24, the support substrate 2
Four circuit boards 27 are respectively attached so as to surround the separated parallel conductive wires 26 attached to the surface of No.4. The circuit board 27 is provided with a switch terminal 27a, a circuit ground terminal 27b, a direction changing wiring 27c, and the like. These circuit boards 27 are electrically connected to the respective separated parallel conducting wires 26 by conducting wires 26 a extending from the separated parallel conducting wires 26. As shown in FIG. 7, the conductive wires 26a at the connection portions with the circuit board 27 are each loosened in an arc shape. In addition, the conductor 2 at the connection portion with the circuit board 27 located near the edge of the support base material 24
6a is a part that is not used for detecting the coordinate position,
There is no problem with sagging in this way.

Here, the separated parallel conducting wires 26 and the circuit board 27
Will be described. For example, the uppermost switch terminal 27a of the right circuit board 27 disposed on the support base 24 has a lower conductive wire 26a extending from the uppermost separated parallel conductive wire 26 and a lower conductive wire 26a. The connection is loosened in an arc.
The conductor 26a is extended from the left end portion of the separated parallel conductor 26 in an arc-shaped manner and connected to the left circuit board 27 provided on the support base 24. The circuit board 27 on the left side thereof is provided with a direction changing wiring 27c for changing the direction of the wiring by 180 degrees, and the lower conductive wire extending from the uppermost separated parallel conductive wire 26 is provided below the separated parallel conductive wire 26. 26a is connected to the upper end of the direction changing wiring 27c. Here, the direction of the wiring is changed by 180 degrees, and the wiring from the right circuit board 27 is folded back to the right circuit board 27 again. A lower conductive wire 26a extending from the third parallel conductive wire 26 at the third level from the top is loosely connected to the lower end of the direction changing wiring 27c in an arc shape. The conducting wire 26a is extended from the right end portion of the separated parallel conducting wire 26 in an arcuate manner and connected to the right circuit board 27 again. The circuit board 27 on the right side
Is provided with a circuit ground terminal 27b for circuit grounding the wiring. The upper conductor 26a of the separated parallel conductor 26 extending from the third separated parallel conductor 26 from the top is connected to the circuit ground terminal 27b. And grounded to the circuit.

The sense coil 23 which is a single-turn coil formed in a substantially rectangular shape is constituted by the above-described series of wirings. Here, the Y coil constituted by the separated parallel conductors 26 attached in the horizontal direction has been described, but the X coil constituted by the separated parallel conductors 26 attached in the vertical direction has the same configuration as the Y coil. The description is omitted.

In the case where a plurality of conductors are directly attached to the supporting base material 24 as in the prior art, it is necessary to devise such means as applying tension to the conductors in order to arrange the conductors linearly. When the separated parallel conductor 26 is used, the conductor 26a
Wire 2 without any special measures such as applying tension to
6a can be arranged linearly. Further, when a plurality of conductive wires are directly attached to the support base material 24 as in the related art, the conductive wires may be disconnected or loosened due to a change in temperature or the bending of the support base material 24. Conductor 2
When the wire 6 is used, excessive force is not easily applied to the wire 26a itself forming the separated parallel wire 26 even when the temperature changes or the support base material 24 bends.
Disconnection and loosening of 6a can be prevented. Therefore, even if an alternating magnetic field is generated from the pen 60 as in the case where the conducting wire 26a is broken, the detection of the coordinate position becomes impossible, and the detection error of the coordinate position increases as in the case where the conducting wire 26a is loosened. Can be prevented.

The separated parallel conductive wire 26 is connected to the support base 24 by engaging a through-hole 26c penetrating the strip-shaped insulator 26b with a support projection 24a projecting from the surface of the support base 24. Since the attachment is performed, the supporting base material 2 is compared with the conventional case where a plurality of conductive wires are directly attached to the supporting base material 24.
4 can be easily attached to the conductive wire 26a. Therefore, the productivity can be greatly improved, and the electronic blackboard 1
Manufacturing cost can be reduced. Although the support protrusion 24a in this embodiment is formed in a columnar shape having a substantially rectangular cross section, the shape is not particularly limited. For example, it may be constituted by an oval column type, a column type, or a plurality of columns.

Here, as shown in FIG. 7, the length of the through hole 26c in the axial direction of the separated parallel conducting wire 26 is formed longer than the length of the support projection 24a in the axial direction of the separated parallel conducting wire 26. The width of the through hole 26c in the direction perpendicular to the axis of the separated parallel conducting wire 26 is formed to be substantially the same as the width of the support protrusion 24a in the direction perpendicular to the axis of the separated parallel conducting wire 26.

Therefore, since the separated parallel conducting wire 26 can freely slide in the axial direction, the supporting projection 24a
Does not hinder the longitudinal contraction or expansion of the spaced parallel conductors 26. That is, even if a temperature change occurs, the separated parallel conductor 26
And the support substrate 24 can contract or expand independently. Accordingly, it is possible to prevent the conductor 26a constituting the separated parallel conductor 26 from being disconnected or loosened due to excessive force being applied to the conductor 26a constituting the separated parallel conductor 26 due to the contraction or expansion in the longitudinal direction of the separated parallel conductor 26. Even if the separated parallel conducting wire 26 slides freely in the axial direction, it does not affect the detection accuracy of the coordinate position.

The separated parallel conducting wire 26 is formed in the through hole 26c.
And the width of the support projection 24a are formed substantially the same, and therefore cannot be freely moved in the direction orthogonal to the axis. Therefore, the spacing between the parallel conductors 26 is always kept constant. That is, each of the conductors 2 forming the spaced parallel conductor 26
Since the interval of 6a is also kept constant, the detection accuracy of the coordinate position can be improved.

Here, in this embodiment, a support projection 24a is projected from the surface of the support base 24 formed in a flat plate shape, and the through hole 26c of the separated parallel conducting wire 26 is engaged with the support projection 24a. To separate the parallel conducting wire 26 from the supporting substrate 24
Is attached to the surface of the support base material 24, and the spaced parallel conducting wires 26
May be formed. Such a modification will be described with reference to FIG.

FIG. 8 is a perspective view showing a part (upper left part) of the supporting base material 24 in which a groove 24b for fitting the separated parallel conducting wire 26 is formed on the surface. In order to facilitate understanding, the separated parallel conductive wires 26 to be fitted and the covering base material 22 that covers the surface of the supporting base material 24 are not illustrated. As shown in FIG. 8, on the surface of the support base material 24, the separated parallel conductive wires 26 correspond to the attachment positions of the separated parallel conductive wires 26.
Are formed in the vertical direction and the horizontal direction, respectively. On the bottom surfaces of the grooves 24b, support projections 24a for engaging the through holes 26c of the separated parallel conductive wires 26 are provided at predetermined intervals.

Each of the spaced parallel conducting wires 26 is fitted in the groove 24b, and the supporting projection 24 is formed in the same manner as in the above-described embodiment.
The through-hole 26c of the separated parallel conductive wire 26 is engaged with the support base material 24, thereby being attached to the support base material 24. As described above, the separated parallel conductive wire 26 is formed with the groove 24b formed to have substantially the same width.
, It is possible to prevent slight loosening of the separated parallel conducting wire 26. Therefore, the detection accuracy of the coordinate position can be further improved. In addition, by fitting the separated parallel conducting wire 26 into the groove 24b, the work of attaching the separated parallel conducting wire 26 to the support base material 24 becomes easier, so that productivity can be improved and the electronic blackboard 1 can be manufactured. Cost can be reduced.

Here, the depth d1 of the horizontal groove 24b
Is formed slightly deeper than the thickness of the separated parallel conducting wire 26. The depth of the groove 24b in the vertical direction is formed to be deeper than the depth d1 of the groove 24b in the horizontal direction by a depth d2 substantially equal to the thickness of the separated parallel conductive wire 26.

Therefore, at the place where the separated parallel conductors 26 arranged in the vertical direction intersect with the separated parallel conductors 26 arranged in the horizontal direction, the separated parallel conductors 26 in the horizontal direction are separated from the separated parallel conductors 26 in the vertical direction. Can cross three-dimensionally by straddling the top of a straight line. That is, it is not necessary to bend the horizontal parallel conductors 26 each time they intersect and to cross the vertical parallel conductors 26 in the vertical direction.

In this embodiment, the vertical grooves 24b
Is formed to be deeper than the depth of the horizontal groove 24b by the thickness of the separated parallel conducting wire 26, but the depth of the groove 24b formed in one of the vertical direction and the horizontal direction is orthogonal to that direction. Any configuration may be used as long as it is formed to be deeper than the depth of the groove 24b formed in the other direction by the thickness of the separated parallel conducting wire 26 or more.

With reference to FIG. 9, the structure of the supporting base material 24 and the covering base material 22 covering the surface thereof when the depth of the groove 24b is changed between the vertical direction and the horizontal direction as described above will be described. I do. FIG. 9 shows grooves 24 in the vertical and horizontal directions.
FIG. 9 is a cross-sectional view taken along the line AA in FIG. 8 of the supporting base material 24 and the covering base material 22 covering the surface when the depth b is changed.

As shown in FIG. 9, the spaced parallel conductors 26 arranged in the vertical direction and the spaced parallel conductors 26 arranged in the horizontal direction are formed by grooves 24 b formed on the surface of the support base material 24.
And the support projection 24a protruding from the bottom surface of the groove 24b is engaged with the through hole 26c of the separated parallel conducting wire 26, thereby being attached to the support base material 24. On the surface side of the support base material 24, a substantially flat cover material 22 is covered.

On the surface (back surface) of the coated base material 22 on the side of the support base material 24, spaced parallel conductive wires 26 are formed in the grooves 2 of the support base material 24.
A plurality of holding projections 22a and 22b are provided to protrude from the bottom surface of 4b. The height of the holding projections 22a for preventing the separated parallel conductive wires 26 arranged in the vertical direction from rising is the distance from the back surface of the covering base material 22 to the surface of the separated parallel conductive wires 26, that is, the height of the horizontal groove 24b. It is formed substantially equal to the depth d1. on the other hand,
The height of the holding projections 22b that prevent the separated parallel conductive wires 26 arranged in the horizontal direction from rising is the distance from the back surface of the coating base material 22 to the surface of the separated parallel conductive wires 26, that is,
It is formed substantially equal to the distance obtained by subtracting the thickness of the parallel conductor 26 from the depth d1 of the horizontal groove 24b.

The width of the spaced parallel conducting wire 26 in the holding projections 22a and 22b in the direction perpendicular to the axis is substantially the same as the width of the spaced parallel conducting wire 26. Further, the separated parallel conductive wires 26 in the holding projections 22a and 22b
Is formed substantially the same as the length of the support protrusion 24a. Further, the projecting positions of the holding projections 22a and 22b correspond to the projecting positions of the support projections 24a.

As described above, the spaced parallel conductive wires 26 attached to the support base material 24 have the holding protrusions projecting at a height substantially equal to the distance from the back surface of the coating base material 22 to the surface of the separated parallel conductive wires 26. By 22b, it is held on the supporting substrate 24 side.
Accordingly, it is possible to prevent the separated parallel conductive wires 26 from being loosened in the normal direction on the surface of the support base material 24.

As described above, the electronic blackboard 1 of this embodiment uses the separated parallel conductive wires 26 which are formed by integrating the two conductive wires 26a arranged in parallel at a predetermined interval with the band-shaped insulator 26b. Since the sense coil 23 is configured,
The conductor 26a can be linearly arranged on the support base 24 without any special measures such as applying tension to the conductor 26a. In the case where the separated parallel conducting wires 26 are used, excessive force is hardly applied to the conducting wires 26a constituting the separated parallel conducting wires 26 even when the temperature changes or the support substrate 24 is bent. Disconnection and loosening can be prevented. Therefore, even if an alternating magnetic field is generated from the pen 60 as in the case where the conducting wire 26a is broken, the detection of the coordinate position becomes impossible, and the detection error of the coordinate position increases as in the case where the conducting wire 26a is loosened. Can be prevented. The separated parallel conductive wire 26 is attached to the support base 24 by engaging a through-hole 26c penetrating through the strip-shaped insulator 26b with a support projection 24a protruding from the surface of the support base 24. Therefore, as compared with the conventional case where a plurality of conductive wires are directly attached to the support base material 24,
4 can be easily attached to the conductive wire 26a.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. Can easily be inferred.

For example, in the present embodiment, a support projection 24a is projected from the surface of a support base 24 formed in a flat plate shape, and the through-hole 26c of the separated parallel conducting wire 26 is engaged with the support projection 24a. The separated parallel conductive wire 26 is
However, even in such a case, the holding projections 22a, 22a,
22b is protruded to separate the parallel conductor 26 from the support base material 24.
It may be held on the side. Further, the holding projections 22a, 22b
Is not required to correspond to the projecting position of the support projection 24a. Therefore, the separated parallel conducting wires 26 are held by the holding projections 22a and 22b on the support base material 24 side by the holding projections 22a and 22b at positions where the support projection 24a is not provided. Is also good.

Further, in this embodiment, the separated parallel conductor 26 is composed of two conductors 26a, but one separated parallel conductor 26 may be composed of three or more conductors 26a. For example, when one separated parallel conducting wire 26 is constituted by four conducting wires 26a, two conducting wires 26a are arranged on each of the left and right sides, and a through hole 26c capable of engaging with the support protrusion 24a is provided therebetween. The separated parallel conducting wire 26 is connected to the supporting substrate 2
4 may be attached.

The structure of the separated parallel conducting wire 26 is not limited to the above embodiment. For example, in the present embodiment, the conducting wire 26a constituting the separated parallel conducting wire 26 is formed of a copper wire, but the conducting wire 26a may be formed of a copper foil instead of the copper wire. In such a case, a conductive wire 26a made of copper foil is formed on a base film made of polyimide or PET by using an etching technique in the same manner as in the method of manufacturing a flexible cable or the like. Note that the surface of the copper foil forming the conductive wire 26a may be covered with a protective layer.

Instead of forming the conductive wire 26a by a copper wire, the conductive wire 26a may be formed by a printed conductive paste printed with a conductive paint such as a silver paste, similarly to a normal printed circuit board.

[0053]

According to the coordinate reading apparatus of the first aspect,
A signal generated by an alternating magnetic field generated by a coordinate input device is detected by spaced parallel conductors attached to a supporting substrate in a vertical direction and a horizontal direction while holding a plurality of conductors at predetermined intervals via a band-shaped insulator. Is done. In the case where a plurality of conductors are directly attached to the support base as in the past, some measures such as applying tension to the conductors in order to arrange the conductors in a straight line were necessary. In such a case, there is an effect that the conductor can be linearly arranged without special measures such as applying tension to the conductor. In addition, when a plurality of conductors are directly attached to the support substrate, the conductors may be disconnected or loose due to temperature changes or the deflection of the support substrate. According to the method, even when a temperature change or a bending of the supporting base material occurs, an excessive force is hardly applied to the conductor itself constituting the separated parallel conductor, so that disconnection or loosening of the conductor can be prevented. Therefore, even if an alternating magnetic field is generated from the coordinate input device as in the case where the conductor is broken, the detection of the coordinate position is not possible, and the detection error of the coordinate position is prevented from increasing as in the case where the conductor is loosened. There is an effect that can be.

According to the coordinate reading device of the second aspect, in addition to the effects of the coordinate reading device of the first aspect, furthermore,
The separated parallel conductor is attached to the support base by engaging a through-hole penetrating through the strip-shaped insulator with a support projection protruding from a surface of the support base on the side of the separation parallel lead attachment surface. Is done. Therefore, as compared with the conventional case where a plurality of conductors are directly attached to the support base material, the work of attaching the conductors to the support base material is easy, so that the productivity can be greatly improved and the production cost can be reduced. There is an effect that can be made.

According to the coordinate reading device of the third aspect, in addition to the effect of the coordinate reading device of the second aspect,
The length of the through hole in the axial direction of the separated parallel conductor is formed to be longer than the length of the support protrusion in the axial direction of the separated parallel conductor, and the width of the through hole in the axis orthogonal direction of the separated parallel conductor is
The width of the support protrusion in the direction perpendicular to the axis of the separated parallel conducting wire is substantially equal to the width of the support protrusion. Therefore, since the separated parallel conductor can slide in the axial direction, the contraction or expansion in the length direction of the separated parallel conductor is not prevented. Therefore, there is an effect that it is possible to prevent the conductor constituting the separated parallel conductor from being disconnected or loosened due to contraction or expansion in the length direction of the separated parallel conductor. In addition, since the movement of the separated parallel conducting wire in the direction orthogonal to the axis is restricted, there is an effect that the detection error of the coordinate position can be prevented from increasing.

According to the coordinate reading device of the fourth aspect, in addition to the effect of the coordinate reading device according to any one of the first to third aspects, furthermore, the separated parallel conducting wire is formed of the separated parallel conducting wire of the supporting base material. It is fitted in a groove having a width substantially the same as the width of the separated parallel conductive wire formed on the surface on the mounting surface side. Therefore, since it is possible to prevent a slight slack of the separated parallel conducting wires, there is an effect that the detection accuracy of the coordinate position can be further improved. In addition, since the work of attaching to the supporting base material becomes easier, the productivity can be improved, and the manufacturing cost can be reduced.

According to the coordinate reading device of the fifth aspect, in addition to the effect of the coordinate reading device of the fourth aspect,
The depth of the groove formed in one direction of the vertical direction or the horizontal direction is formed to be deeper than the depth of the groove formed in the other direction orthogonal to that direction by the thickness of the separated parallel conductor or more. I have. Therefore, at the point where the spaced parallel conductors arranged in the vertical direction intersect with the spaced parallel conductors arranged in the horizontal direction,
There is no need to bend one separated parallel conductor every time it intersects and get over the other separated parallel conductor, and one-way separated parallel conductor crosses three-dimensionally over the separated parallel conductor in a straight line. There is an effect that can be.

According to the coordinate reading device of the sixth aspect, in addition to the effect of the coordinate reading device of any one of the first to fifth aspects, furthermore, the separated parallel conducting wire attached to the supporting base material is The coating substrate is held on the supporting substrate side by holding projections projecting from the surface of the supporting substrate surface side at a height substantially equal to the distance from the surface of the coating substrate to the surface of the separated parallel conductor. Therefore, there is an effect that the separated parallel conductive wires can be prevented from loosening in the normal direction of the support base material surface.

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating a main configuration of an electronic blackboard according to an embodiment.

FIG. 2 is an explanatory diagram showing a state in which a personal computer and a printer are connected to the electronic blackboard.

FIG. 3 is an exploded perspective view showing components of the writing panel main body.

FIG. 4A is an explanatory view showing a configuration of a sense coil with a part thereof omitted, and FIG. 4B is an explanatory view showing a width and an overlapping pitch of the sense coil shown in FIG. 4A. is there.

FIG. 5 is a perspective view showing a front side of a supporting base material.

FIG. 6 is a perspective view of the separated parallel conductor showing a partial cross section.

FIG. 7 is a front view of the front side of the supporting base material in a state where the separated parallel conducting wires are attached.

FIG. 8 is a perspective view showing a part of the supporting base material in which a groove for fitting a separate parallel conducting wire to a surface is formed.

FIG. 9 shows the supporting base material and the covering base material covering the surface when the depth of the groove is changed between the vertical direction and the horizontal direction.
It is sectional drawing in the AA line in a middle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic blackboard (coordinate reading device) 22 Coating base material 22a, 22b Holding projection 24 Supporting base material 24a Supporting projection 24b Groove 26 Separated parallel conducting wire 26a Conducting wire 26b Insulator 26c Through hole 60 Pen (coordinate input tool)

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2C071 CA02 CD01 DA05 DB04 DC06 EB04 5B068 AA04 AA15 BB16 BC14 BD02 BD17 BD25 CC12

Claims (6)

[Claims] 1. A coordinate input device for generating an alternating magnetic field, a plurality of conductors arranged in a vertical direction and a horizontal direction for detecting a signal generated by the alternating magnetic field generated by the coordinate input device, and the plurality of conductors A coordinate reading device comprising a supporting base material for attaching the supporting base material and a covering base material for covering the conducting wire with respect to the supporting base material, wherein the conducting wire is supported while being held at predetermined intervals via a band-shaped insulator. A coordinate reading device comprising separated parallel conductors attached to a base material in a vertical direction and a horizontal direction. 2. A through-hole penetrating through a band-shaped insulator constituting the spaced parallel conductor, and engageable with the through hole, and protrudes from a surface of the support base material on a surface of the support base on which the spaced parallel conductor is attached. The coordinate reading device according to claim 1, further comprising a support projection provided. 3. The length of the through hole in the axial direction of the separated parallel conductor is longer than the length of the support protrusion in the axial direction of the separated parallel conductor, and the length of the through hole in the axis orthogonal direction of the separated parallel conductor is increased. 3. The coordinate reading device according to claim 2, wherein a width of the hole is formed to be substantially the same as a width of the support protrusion in a direction perpendicular to an axis of the spaced parallel conducting wire. 4. A groove having a width substantially equal to the width of the spaced parallel conductor is formed on a surface of the support base on the side of the attachment surface of the spaced parallel conductor. 3. The coordinate reading device according to any one of 3. 5. The depth of the groove formed in one direction of the vertical direction or the horizontal direction is greater than the depth of the groove formed in another direction orthogonal to the direction. 5. The semiconductor device according to claim 4, wherein:
The coordinate reading device according to the above. 6. A holding projection having a height substantially equal to a distance from a surface of the coating base to a surface of the separated parallel conductor is provided on a surface of the coated base on a side of the support base. The coordinate reading device according to any one of claims 1 to 5, wherein the coordinate reading device is provided so as to project along.