JPH1142890A - Electronic blackboard - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent deterioration of the quality of a read image of an optical read device when a base frame is deformed by an impact during the transportation thereof and a supporting plate also is deformed, in an electronic blackboard in which the optical read device is mounted to a base frame of a blackboard body through the supporting plate. SOLUTION: A base frame 12 is constituted of a left and right vertical frames 30, 31, a top and bottom horizontal frames 32, 33, and two reinforcing frames 34, 35 laid between the frames 32, 33. And one side of a supporting plate 40, to which a lens 23 and a CCD 24 of an optical read device 20 are mounted, is fixed to one of the frames 34, while the other side of the plate 40 is held movably by the other reinforcing frame 35 by fitting an axis 44 into an oblong hole 43.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a writing surface such as a water-based pen or the like formed on a front surface of a blackboard body with a part of a sheet stretched inside facing the outside to form a writing surface. The present invention relates to an electronic blackboard for performing writing using the optical writing device and reading a copy of the written content as necessary.

[0002]

2. Description of the Related Art Conventionally, among such electronic blackboards, there is one in which a base frame of the blackboard body is formed in a rectangular shape as shown in FIG. 9, for example.

The rectangular frame-shaped base frame 1 is composed of left and right vertical frames 2, upper and lower horizontal frames 3, and two reinforcing frames 4 spanned between the horizontal frames 3. A fluorescent lamp 5a and a mirror 5b of an optical reading device, generally indicated by reference numeral 5 in the drawing, are mounted on the horizontal frame 3 next to the left vertical frame 2, and the lens 5c and the CCD 5d are mounted on the reinforcing frame. It was fixed and supported on a support plate 6 attached between the four.

Conventionally, the support plate 6 is formed by bending both ends of a slightly long rectangular sheet metal into a U-shape, and fixing the bent both sides to the reinforcing frame 4 by screwing, welding, or the like.

[0005]

However, in such a conventional electronic blackboard, since both sides of the support plate 6 are fixed to the reinforcing frame 4 by screwing, welding, or the like, for example, the base frame is subjected to a shock during transportation or the like. If 1 is twisted or distorted and deformed, the support plate 6 will be deformed accordingly. Then, at the time of subsequent use, the written content is read by the optical reading device 5.
When reading by the method, since the support plate 6 is deformed, the optical axis passing through the lens 5c is displaced. As a result, the written contents cannot be read accurately, and the quality of the read image deteriorates. .

[0006]

Therefore, according to the first aspect of the present invention, writing is performed on a writing surface P of a blackboard main body 10 as in the following embodiments shown in FIGS.
A part of the optical reading device 20 is attached to a support plate 40 on an electronic blackboard that reads a copy of the written content by reading with the optical reading device 20 as necessary, and the support plate 40 is attached to the base frame 12 of the blackboard main body 10. Fixing one side of the optical reading device 20 in the direction of the optical axis L,
The other side is movably held.

When the base frame 12 is deformed due to an impact during transportation or storage, for example, the support plate 40
Moves following the movement of one side fixed to the base frame 12.

According to a second aspect of the present invention, in the electronic blackboard according to the first aspect, for example, the other side of the support plate 40 is connected to a shaft 44 as in the following embodiments shown in FIGS.
And the long hole 43 is held by fitting.

When the base frame 12 is deformed, the support plate 40 follows the movement of one side fixed to the base frame 12 and moves about the fitting position A on the other side as a fulcrum.

According to a third aspect of the present invention, there is provided the electronic blackboard according to the first or second aspect, wherein the shaft 44 and the elongated hole 4 are provided as in the following embodiments shown in FIGS.
3 with the optical axis L of the optical reader 20.
Formed by providing on an extension line L ₁ of, characterized in that.

When the base frame 12 is deformed, the support plate 40 follows the movement of one side fixed to the base frame 12 and moves about the optical axis L about the fitting position A on the other side as a fulcrum. .

According to a fourth aspect of the present invention, there is provided the electronic blackboard according to the first aspect, wherein the other side of the support plate 40 is provided with a surface b as in the embodiment shown in FIGS. And a projection 40d that abuts the same.

When the base frame 12 is deformed, the support plate 40 follows the movement of one side fixed to the base frame 12 and moves about the engagement position B on the other side as a fulcrum.

According to a fifth aspect of the present invention, in the electronic blackboard according to the first or fourth aspect, for example, as described in the following embodiment, the engagement position between the surface and the projection is determined by the optical reading device. Characterized by being provided on an extension of the optical axis.

When the base frame is deformed,
The support plate follows the movement of one side fixed to the base frame and moves about the optical axis with the engagement position on the other side as a fulcrum.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 is an external perspective view of an electronic blackboard according to an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram showing an outline of the internal mechanism as viewed from above.

As shown in FIG. 7, the electronic blackboard has a flat, horizontally long blackboard body 10 that is movably supported by a stand 11 with casters.

The blackboard body 10 includes an outer frame case 13 having a large front window 13a at the front in FIG.
From 3a, a part of a writing sheet 15 provided in a writing unit 14 described later is faced, and a writing surface P is formed thereon.

The blackboard main body 10 includes an outer frame case 13.
Operation panel 16 provided with a copy switch on one side edge of
Is provided. Further, an elongated pen tray 17 is provided along the lower edge of the outer frame case 13, and a printer 18 is provided on the lower right side of the pen tray 17.

The main body 10 of the blackboard is provided inside FIG.
As shown in FIG. 1, the writing unit 14 and the optical reading device 20 are provided, and they are supported by the base frame 12. The optical reading device 20 includes a fluorescent lamp 21 and a mirror 22.
, A lens 23, a CCD 24 and the like.

The writing unit 14 includes four rollers 25 to 28 provided upright on both right and left sides, the writing sheet 15 to be bridged between the rollers, and a back plate 29 for backing the writing surface P of the writing sheet 15. Are unitized by being supported by upper and lower frames (not shown).

When the above-described electronic blackboard is used, characters, pictures, and the like are written on the writing surface P using a writing implement such as an aqueous pen.

When a copy of the written contents is to be made, a copy switch on the operation panel 16 is operated to drive a motor (not shown) to rotate the driving roller 25 and to rotate the driven rollers 26 to 28 while being driven. Writing sheet 1
5 is conveyed, and the writing sheet 15 is irradiated with light from a fluorescent lamp 21 of a reading device 20 and the reflected light is reflected by a mirror 22 to form an image on a CCD 24 through a lens 23 to write the written contents. read. Then, a signal from the reading device 20 is input to the printer 18, and the read content is reduced and the paper is discharged while being recorded on the paper.

In the above-described electronic blackboard, the base frame 12 has a rectangular frame shape as shown in FIG. 1, and includes left and right vertical frames 30 and 31 and upper and lower horizontal frames 32 and 33.
Is provided. The left and right ends of the upper and lower horizontal frames 32 and 33 are fixed to the upper and lower ends of the vertical frames 30 and 31 by welding or the like.

Further, the base frame 12 is
Reinforcement frames 34 and 35 are attached so as to span between the two and 33. The reinforcing frames 34 and 35 are formed by bending a long and thin sheet metal and leaving a slit between both side edges to form a substantially U-shaped cross section, and upper and lower ends thereof are fixed to the horizontal frames 32 and 33 by welding or the like.

The vertically extending fluorescent lamp 21 of the optical reader 20 described above is used for the base frame 12 having such a configuration.
The mirror 22 is mounted on the vertical frame 30 on the right side in FIG.

On the other hand, the lens 23 and the CCD 24 of the optical reading device 20 are fixed to a support plate indicated by reference numeral 40 in FIG. 1 and attached to reinforcing frames 34 and 35 via the support plate 40.

The support plate 40 is formed, for example, by bending both ends of a slightly long sheet metal into a U-shape.
・ The length of the flat plate portion 40c between the 40b and the reinforcing frames 34 and 35
It is formed slightly shorter than the distance. Further, as shown in FIG. 2, a screw hole 42 is provided in one side plate portion 40a, and a long hole 43 long in the front-rear direction is provided in the other side plate portion 40b.

The lens 23 and the CCD 24 are fixed to the support plate 40 in front of the flat plate portion 40c. And
The support plate 40 is disposed between the reinforcing frames 34 and 35,
Then, a shaft 44 provided horizontally on the reinforcing frame 35 is inserted. Then, the other side of the support plate 40 is held by the reinforcing frame 35 by the fitting of the shaft 44 and the elongated hole 43. On the other hand, the one side plate portion 40a is brought into contact with the reinforcing frame 34, and is screwed into the screw hole 42 through the screw 45 as shown in FIG.

In this manner, the support plate 40 has one side fixed to the reinforcing frame 34 and the other side provided with a gap d between the supporting frame 40 and the reinforcing frame 35 as shown in FIG. Are supported in a movable state using the fitting position A of the as a fulcrum.

In the above-described electronic blackboard, for example, during transportation or storage, an impact or the like may be applied to the base frame 12, and the base frame 12 may be twisted or distorted. However, at this time, since the other side is movable, the support plate 40 follows the movement of one side fixed to the reinforcing frame 34 and moves about the fitting position A on the other side as a fulcrum, and does not deform.

[0032] Incidentally, the electronic blackboard mentioned above, for example, as shown in FIGS. 3 and 4, the position A fit of the shaft 44 and slots 43, on the extended line L ₁ of the optical axis L shown by a chain line in FIG It is good to provide.

In this case, a notch recess 46 through which light passes is provided on the front side of the reinforcing frame 34 on one side. On the other hand, the reinforcing frame 35 of the other side, provided in a position where an extension line L ₁ of the optical axis L intersects fixed shaft 44 welded or the like.

The support plate 40 is provided with a vertically long rectangular hole 47 between the screw holes 42 of the side plate portion 40a. The lens 23 and the CCD 24 are provided on a line connecting the rectangular hole 47 and the center of the long hole 43 between the side plate portions 40a and 40b, and they are fixed on the flat plate portion 40c.

Then, the supporting plate 40 is connected to the reinforcing frames 34 and 35.
The other side of the support plate 40 is movably held by fitting the shaft 44 and the elongated hole 43 together. Then, the side plate portion 40a is fixed to the reinforcing frame 34 by screwing, and the shaft 44 and the long hole 43 are fixed.
The fitting position A becomes so positioned on the extended line L ₁ of the optical axis L of.

In this embodiment, when the base frame 12 is distorted or the like as described above, the support plate 40 follows the movement of one side fixed to the reinforcing frame 34 and fits on the other side. It moves about the optical axis L with the position A as a fulcrum.

By the way, in the above embodiment, the other side of the support plate 40 is configured to be movable by fitting the shaft 44 and the elongated hole 43. However, as described below, the surface and the projections Can be made movable by the engagement of.

In this case, as shown in FIGS. 5 and 6, for example, a rectangular sheet metal is used as the support plate 40, and two screw holes (not shown) are provided on one side (left side in the figure). On the other side, one projection 40d is provided by, for example, a press. Then, the lens 23 and the CCD 24 are fixed on the front side opposite to the projection 40d.

Then, one side of the support plate 40 is
4 is screwed to the surface a on the positive side, and the projection 40d on the other side is brought into contact with the front surface b of the reinforcing frame 35 to engage therewith. The support plate 40 is fixed on one side to the reinforcing frame 34, while the other side is moved against the reinforcing frame 35 in a movable state with the engagement position B between the surface b and the protrusion 40 d as a fulcrum and regulated. Become.

However, in this embodiment, when the base frame 12 is distorted as described above, the support plate 40 follows the movement of one side fixed to the reinforcing frame 34 and engages with the other side. It moves about the optical axis L about the joint position B as a fulcrum.

According to the present invention, for example, the engagement position B between the surface b and the projection 40d is changed to the optical axis L as described above.
, And the support plate 40 can be made movable about the optical axis L.

[0042]

Therefore, according to the present invention, one side of the support plate is fixed to the base frame, and the other side is fitted with the shaft and the elongated hole or the surface and the projection. When the base frame is distorted due to the engagement of
Since the support plate is moved following the movement of one side fixed to the base frame, even if the base frame is distorted, the support plate is not deformed, so that the written contents can be read. Occasionally, it is possible to prevent the optical axis of the optical reading device from being displaced due to the deformation of the support plate, and to improve the quality of the read image.

According to the third or fifth aspect of the present invention,
In addition, the fitting position of the shaft and the long hole or the engaging position of the surface and the protrusion is provided on the extension of the optical axis, and when distortion or the like occurs in the base frame, the support plate is fixed to the base frame. Since the optical axis moves along the optical axis following the movement of the side, it is possible to more reliably prevent the optical axis from being displaced due to the deformation of the base frame when reading the written contents.

[Brief description of the drawings]

FIG. 1 shows a base frame of an electronic blackboard according to the present invention.
FIG. 3 is a perspective view illustrating a state where an optical reading device is attached.

FIG. 2 is a perspective view showing a state in which a support plate of an optical reading device is attached to a reinforcing frame of a base frame, partially cut away.

FIG. 3 is a perspective view showing another example of attaching a support plate of an optical reader to the reinforcing frame.

FIG. 4 is a partial cross-sectional view showing a state after the support plate is mounted in another example as viewed from above.

FIG. 5 is a perspective view showing still another example of attaching a support plate of an optical reader to the reinforcing frame.

FIG. 6 is a partial cross-sectional view showing a state after mounting the support plate in another example as viewed from above.

FIG. 7 is an external perspective view of the electronic blackboard.

FIG. 8 is a schematic configuration diagram showing the internal mechanism of the electronic blackboard as viewed from above.

FIG. 9 is a perspective view showing a base frame of a conventional electronic blackboard and an optical reader attached thereto.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Blackboard main body 12 Base frame 20 Optical reading device 40 Support plate 43 Elongated hole 44 Axis 40d Projection A A fitting position B Engaging position L Optical axis L ₁ Extension line P Writing surface b surface

Claims (5)

[Claims] An electronic blackboard for writing on a writing surface of a main body of a blackboard, reading the written contents with an optical reading device as needed, and mounting a part of the optical reading device on a support plate to support the copy. An electronic blackboard in which a plate is fixed on one side in the optical axis direction of a part of the optical reading device and the other side is movable by a base frame of the blackboard main body. 2. The electronic blackboard according to claim 1, wherein the other side of the support plate is held by fitting a shaft and an elongated hole. 3. The electronic blackboard according to claim 1, wherein a fitting position of the shaft and the elongated hole is provided on an extension of an optical axis of the optical reading device. 4. The electronic blackboard according to claim 1, wherein the other side of said support plate is held by engagement between a surface and a projection abutting against the surface. 5. The electronic blackboard according to claim 1, wherein an engagement position between the surface and the protrusion is provided on an extension of an optical axis of the optical reading device.