JP2999855B2 - Electronic blackboard - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard used in a conference room or the like.

[0002]

2. Description of the Related Art An example of a conventional electronic blackboard will be described with reference to FIGS. First, the outline of the configuration of the appearance of the electronic blackboard will be described with reference to FIG. On the front of the electronic blackboard main body 1, a large screen 2 that can be written and erased is provided.
Is provided. The periphery and outer peripheral edge of the screen 2 are covered with a decorative frame 3 divided into four parts in the upper, lower, left and right directions.
Further, a printer 4 is mounted below the screen 2. Further, a pair of stands 5 having a rectangular cross section for holding the electronic blackboard main body 1 in the floor direction is attached to the left and right decorative frames 3 of the screen 2. These pair of stands 5 are formed in an inverted T shape in the floor direction,
Two casters 6 are mounted on the floor side of the stand 5 respectively.

Next, an outline of the internal structure of the electronic whiteboard main body 1 will be described with reference to FIG. Rollers 7 and 8 around which the endless screen 2 is wound are disposed at both left and right ends in the electronic blackboard main body 1. On the back side of the screen 2, there is provided a reading unit 9 for reading handwritten information written on the screen 2. The reading section 9 has a function of illuminating the screen 2 with a fluorescent lamp 10 and reading a reflected image from the screen 2 by a CCD 13 via a mirror 11 and a lens 12. A back plate 14 that covers the back of the electronic blackboard main body 1 is provided at the back of the reading unit 9.

In such a configuration, the reading section 9, the screen 2, and the rollers 7, 8 are covered with the decorative frame 3, which is divided into four parts in the upper, lower, left and right directions, around the periphery and the outer peripheral edge of the screen 2.
And protect the internal components, and beautify the appearance. The user moves the electronic blackboard main body 1 to a place where the electronic blackboard main body 1 is to be used by the casters 6 of the stand 5.

[0005]

However, the electronic blackboard provided with the decorative frame 3 has the following problems. First, structural issues will be described. On the electronic blackboard, in addition to the decorative frame 3 divided into four as described in the above-described conventional example (see FIG. 10), as shown in FIG. 12, upper and lower decorative frames 3a and left and right decorative frames 3b are provided. The decorative frame 3 divided into eight by the corner decorative frame 3c is also used. As described above, the number of parts by the decorative frame 3 increases, so that the assembling work is troublesome, and the parts cost and the assembling cost are increased. Further, since the number of parts by the decorative frame 3 increases and the overall weight increases, the moving operability deteriorates. And
Since the surroundings of the internal components and the screen 2 are covered with the decorative frame 3, the thickness a increases as shown in FIG. Furthermore, the appearance of the decorative frame 3 is heavy, and the design is not clear.

[0006] Next, among the above-mentioned structural problems, in particular, problems in using the electronic blackboard will be described. FIG.
Since the decorative frame 3 covers a part of the left and right sides of the screen 2 as shown in FIG. 2, writing information 15 such as characters and figures written on an area near the decorative frame 3 at the end of the screen 2 is erased. When erasing, the eraser 16 contacts the end of the decorative frame 3 and is difficult to erase. Moreover, as shown in FIG. 15, the writing area of the screen 2 is reduced only in the area b covered by the decorative frame 3, so that it is not possible to write near the rollers 7, 8 around which the screen 2 is wound. As shown in FIG. 16, when the writing information 15 such as characters and figures written on the screen 2 is wiped off by the eraser 16, the ink powder 17 is removed.
Falls and enters through the gap between the screen 2 and the decorative frame 3 and accumulates. As a result, the ink powder 17 that has accumulated due to the influence of static electricity or the like soars and adheres to the internal components, thereby deteriorating the performance.

[0007]

According to the first aspect of the present invention, a screen wound around a pair of left and right parallel rollers is provided, and a projection is provided to cover left and right outer peripheral edges of the screen. A pair of left and right rectangular tube-shaped stands that stand upright in the direction were formed.

According to a second aspect of the present invention, in the first aspect of the present invention, a pair of upper and lower frame members having a rectangular cross section and having a projection covering the upper and lower outer peripheral edges of the screen are formed.

According to a third aspect of the present invention, in the first aspect of the present invention, there is provided a pair of upper and lower rollers having a bent portion for covering the upper and lower outer peripheral edges of the screen and holding both upper and lower ends of a pair of left and right rollers around which the screen is wound. Was formed.

According to the present invention, a screen wound around a pair of left and right parallel rollers is provided, and the left and right outer peripheral edges of the screen are covered, and the screen is brought into close proximity to the pair of right and left rollers and is flush with the screen. A pair of left and right rectangular tube-shaped stands having a pair of left and right sides that have a protruding portion formed in the floor and hold the screen upright in the floor direction are provided. A pair of upper and lower holding frames having a pair of frames or bent portions covering the upper and lower outer peripheral edges of the screen and holding the upper and lower ends of the pair of rollers are disposed rearward of the screen and close to the screen. .

[0011]

According to the first aspect of the present invention, the number of components can be reduced by providing the pair of left and right stands with a function of covering the left and right outer peripheral edges of the screen and a function of supporting the screen. .

According to the second aspect of the present invention, since the pair of upper and lower frame members having the protrusions covering the upper and lower outer peripheral edges of the screen are formed in a rectangular cross section, the strength is excellent, and the pair of upper and lower frames is further improved. By providing the function of covering the upper and lower outer peripheral edges of the screen with the protruding portion of the body, it is possible to further reduce the number of component parts.

According to the third aspect of the present invention, the upper and lower holding frames of the screen have a function of holding the upper and lower ends of the pair of right and left rollers and a function of covering the upper and lower outer peripheral edges of the screen. The number of components can be reduced.

According to the fourth aspect of the present invention, the writing area of the screen is increased by forming the projections of each of the pair of right and left stands on substantially the same plane as the screen, and the writing is performed at the left and right ends of the screen. When erasing the characters, figures, etc. that have been erased with the eraser, the eraser does not come into contact with the end of the stand, making it easier to wipe, and by disposing a pair of upper and lower frames or holding frames behind the screen, When erasing characters, figures, and the like written on the screen with the eraser, the ink powder falls and does not enter the gap between the screen and the frame or the holding frame.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, an outline of the overall configuration of the present embodiment is shown in FIG.
It will be described based on. This device is a screen unit 18
, A reading unit 19, and a pair of stands 20. The reading unit 19 is attached to the back side of the screen unit 18 by screws 19a. Further, a pair of the stand 20 is provided on both left and right sides of the screen unit 18 via the reading unit 19.
Are attached by screws 20a.

The screen unit 18 includes a large endless screen 23 wound around parallel rollers 21 and 22 spaced apart from each other, a screen support board 24 for supporting the screen 23 from behind, And the rollers 21,
It comprises a pair of upper and lower holding frames 25 for rotatably holding the upper and lower ends of the roller 22, and a drive motor 26 for driving one of the rollers 22 to rotate. Each of the upper and lower holding frames 25 has bent portions 25a bent toward the screen at both front and rear ends. A plurality of screw mounting holes 25b are formed in the bent portions 25a at the rear ends of the upper and lower holding frames 25, respectively.

The reading unit 19 includes a reading section 32 having a fluorescent lamp 27, a mirror 28, a lens 29, and a CCD 31 mounted on a CCD substrate 30, and a reading section 32.
Are attached to the back plate 33. The reading unit 32 illuminates the screen 23 with the fluorescent lamp 27, reflects the reflected light from the screen 23 back and forth with the mirror 28, shortens the optical path length of the reading with the lens 29, and applies the light to the CCD 31. Image
The CCD 31 has a function of reading characters, figures, and the like written on the screen 23. The back plate 3
3 is provided with bent portions 33a bent forward at both ends in the horizontal direction. Each of the bent portions 33a has a plurality of screw mounting holes 33b. The back plate 32
A plurality of screw mounting holes 33d facing the plurality of screw mounting holes 25b formed in the bent portions 25a of the upper and lower holding frames 25 are formed at the upper and lower ends of the flat plate portion 33c at the center of the frame. .

The stand 20 is provided with the screen 23
Has a protruding portion 20b protruding from the left and right ends toward the screen 23, and has a rectangular tubular cross-sectional shape in the horizontal direction and is formed in an inverted T-shape toward the floor direction. In addition, two casters 34 are attached to the floor side of the pair of left and right stands 20 respectively. The pair of stands 20 has a function of covering the left and right outer peripheral edges of the screen 23 with the protruding portions 20b and standing and holding the screen unit 18 and the reading unit 19 in the floor direction. Furthermore, the left and right stands 20
On each side surface, a plurality of screw mounting holes 20c facing the plurality of screw mounting holes 33b formed in the bent portions 33a at both ends of the back plate 33 are formed.

In such a configuration, the screw mounting holes 25b of the bent portions 25a of the pair of upper and lower holding frames 25 of the screen unit 18 and the screw mounting holes 33d of the flat plate portion 33c of the back plate 33 of the reading unit 19 are connected to the screws 19a. And screw them together. Further, the screw mounting holes 33b of the bent portion 33a of the back plate 33 of the reading unit 19 and the screw mounting holes 20c on the left and right side surfaces of the stand 20 are inserted and screwed together with the screws 20a. Thus, the electronic blackboard is assembled as shown in FIG.

Next, the shape of the screen 23 of the electronic blackboard in the left-right direction will be described. As shown in FIG. 3, the protruding portion 20b of the stand 20 is disposed close to the rollers 21 and 22 around which the screen 23 is wound.
By covering the left and right outer peripheral edges of the screen 23 with b, the function of the conventional decorative frame 3 is achieved. FIG. 4 shows a modification of the protruding portion 20b of the stand 20 that performs the same function as the function of the decorative frame 3. FIG. 4A shows a pair of left and right stands 20 on which the rollers 21 and 22 are formed by triangular protrusions 20b. FIG. 4B shows a configuration in which the rollers 21 and 22 sides of the stand 20 are formed by flat protrusions 20b. In FIG. 4C, the rollers 21 and 22 of the stand 20 are formed by a protruding portion 20b having a curved surface along the outer peripheral surface of the rollers 21 and 22. These stands 20 are made of a material such as iron or aluminum by an extrusion molding method.

Next, the vertical shape of the electronic blackboard will be described. As shown in FIG. 5, since the upper and lower holding frames 25 cover the upper and lower outer edges of the screen 23 with the bent portions 25a, they have the function of the conventional decorative frame 3. These upper and lower holding frames 25 are formed by a sheet metal method or an extrusion method using a material such as iron or aluminum. As described above, the stand 20 and the holding frame 25 have the function of the conventional decorative frame 3 and eliminate the decorative frame 3 as compared with the conventional electronic blackboard, so that the number of parts can be reduced. . As a result, assembly time is reduced, and
Parts costs and assembly costs are reduced. Further, since the conventional decorative frame 3 is eliminated and the overall weight is reduced, the moving operability is improved. And because there is no conventional makeup frame 3,
The thickness is reduced, and the appearance is simple in design.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first embodiment (see FIGS. 1 to 5) are denoted by the same reference numerals, and description thereof is omitted (the same applies to the following embodiments). A pair of upper and lower holding plates 35 that hold the upper and lower ends of the rollers 21 and 22 around which the screen 23 is wound are attached to the back plate 33 by screws 19a. Outside the upper and lower holding plates 35, there are plate-like projections 36 a covering the upper and lower outer peripheral edges of the screen 23, and have the same rectangular tubular cross-sectional shape as the stand 20 in the vertical direction to form rigidity. A pair of upper and lower frames 36 having a structure are formed.

In such a configuration, the rollers 21 and
By covering each axis 2 with a frame 36 to make the axis invisible from the outside, the external appearance looks cleaner compared to the holding frame 25 used in the first embodiment (see FIG. 5). . Further, since the frame body 36 has the same cross-sectional shape as the stand 20 having a rectangular tube-shaped cross-sectional shape, it is stronger than the holding frame body 25 and has a sense of unity with the stand 20 as shown in FIG. .

Next, a third embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 8, the protrusions 20b on the front side of the left and right stands 20 are formed on the same plane as the screen 23. As shown in FIG. 9, a pair of upper and lower holding frames 25 or 3 of the screen 23 is provided.
6 is behind the screen 23
It is arranged close to.

In such a configuration, since the projections 20b on the front side of the left and right stands 20 are formed on the same plane as the screen 23, characters, figures, and the like written on the left and right ends of the screen 23 can be displayed. When wiping with the eraser 16, the eraser 16 is easy to wipe without touching the end of the stand 20. In addition, the area of the screen 23 where the screen 23 is to be written is widened, and it is possible to write to the end of the screen 23. Further, since the pair of upper and lower holding frames 25 or 36 of the screen 23 are disposed rearward of the screen 23 and close to the screen 23, the writing information 15 such as characters and graphics written on the screen 23 is written.
When the ink powder 17 is wiped off by the eraser 16, the ink powder 17 falls to the outside of the screen unit 18 without entering between the lower side of the screen 23 and the frame 36 or the holding frame 25. To prevent deterioration of the function.

[0026]

According to the first aspect of the present invention, a screen wound around a pair of left and right parallel rollers is provided, and the screen has projections covering left and right outer peripheral edges, and the screen is erected in the floor direction. By forming a pair of left and right stands having a rectangular tubular cross section to hold, by reducing the number of components by giving the pair of left and right stands a function of covering the left and right outer peripheral edges of the screen and a function of supporting the screen, The assembly work time can be reduced, and the cost of parts and assembly can be reduced.
This has the effect of reducing the overall weight and improving the movement operability.

According to a second aspect of the present invention, in the first aspect of the present invention, a pair of upper and lower frame members having a rectangular cross section having projections covering the upper and lower outer peripheral edges of the screen are formed. Since a pair of upper and lower frame members having a projection covering the outer peripheral edge are formed in a rectangular cross section, the strength is excellent,
By providing a function of covering the upper and lower outer peripheral edges of the screen with the projecting portions of the pair of upper and lower frames, the number of component parts is further reduced, so that assembly work time can be reduced, and furthermore, component costs and assembly costs , The overall weight can be reduced, the movement operability can be improved, and the appearance can be reduced in design.

According to a third aspect of the present invention, in the first aspect of the present invention, a pair of upper and lower rollers having a bent portion for covering the upper and lower outer peripheral edges of the screen and holding the upper and lower ends of a pair of left and right rollers around which the screen is wound. Since the holding frame body is formed, a pair of upper and lower holding frame bodies of the screen have a function of holding the upper and lower ends of a pair of left and right rollers and a function of covering the upper and lower outer peripheral edges of the screen, further reducing the number of component parts. By doing so, the assembly work time can be shortened, the cost of parts and assembly can be reduced, the overall weight can be reduced, and the operability can be improved. Has an effect of being able to make the design clear.

According to a fourth aspect of the present invention, a screen wound around a pair of right and left parallel rollers is provided, and the left and right outer peripheral edges of the screen are covered, and the screen is brought close to the pair of right and left rollers and is flush with the screen. A pair of left and right rectangular tube-shaped stands having a pair of left and right sides that have a protruding portion formed in the floor and hold the screen upright in the floor direction are provided. A pair of upper and lower holding frames having a pair of frames or bent portions covering the upper and lower outer peripheral edges of the screen and holding the upper and lower ends of the pair of rollers are disposed rearward of the screen and close to the screen. Therefore, by arranging the front surfaces of the pair of left and right stands on substantially the same plane as the screen, the area where the screen can be written can be widened. When erasing characters, figures, etc., written on the left and right ends of the stand with the eraser, the eraser can be easily wiped without touching the end of the stand, and a pair of upper and lower frames or holding frames By arranging behind the screen, when erasing the characters and figures written on the screen with the eraser, the ink powder will fall and prevent it from entering the gap between the screen and the frame or the holding frame, This has the effect of preventing the ink powder from adhering to the internal components and lowering the function.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state where the electronic blackboard is assembled.

FIG. 3 is a cross-sectional plan view of the electronic blackboard.

4A and 4B show a cross-sectional shape of a stand as a modification of the first embodiment. FIG. 4A is a partial cross-sectional plan view in which a protrusion is formed in a triangular shape, and FIG. FIG. 4C is a partial cross-sectional plan view in which a protrusion is formed in a curved shape along the outer peripheral surface of the roller.

FIG. 5 is a partial vertical sectional side view showing a sectional shape of a holding frame.

FIG. 6 is a partial vertical sectional side view showing a second embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which the stand and the frame are combined.

FIG. 8 is a partial cross-sectional plan view showing a third embodiment of the present invention.

9A and 9B show a third embodiment of the present invention, in which FIG. 9A is a partial longitudinal sectional side view of an electronic blackboard using a frame, and FIG. 9B is an electronic blackboard using a holding frame. It is a partial vertical side view.

FIG. 10 is a perspective view showing a conventional example.

FIG. 11 is a cross-sectional plan view schematically showing the internal configuration of the electronic blackboard.

FIG. 12 is a schematic front view showing a divided state of a decorative frame covering the periphery of a screen.

FIG. 13 is a cross-sectional plan view showing the thickness of an electronic blackboard using a decorative frame.

FIG. 14 is a partial cross-sectional plan view showing a state in which information written on an edge of a screen is wiped off by an eraser.

FIG. 15 is a partial cross-sectional plan view showing a state where a writing area of the screen is reduced by a decorative frame covering a part of the screen.

FIG. 16 is a perspective view showing a state in which ink powder drops when information written on a screen is wiped off.

[Explanation of symbols]

 Reference Signs List 20 Stand 20b, 36a Projecting portion 21, 22 Roller 23 Screen 25 Holding frame 25a Bending portion 36 Frame

Claims (4)

(57) [Claims] A screen wound around a pair of left and right parallel rollers, a projecting portion covering left and right outer peripheral edges of the screen, and a pair of right and left cross-sectional square tubes for standing and holding the screen in a floor direction. An electronic blackboard having a shape of a stand. 2. An electronic blackboard according to claim 1, wherein a pair of upper and lower frame members having a rectangular cross-sectional shape and having protrusions covering upper and lower outer peripheral edges of the screen are formed. 3. A pair of upper and lower holding frames having a bent portion for covering upper and lower outer peripheral edges of the screen and holding upper and lower ends of a pair of left and right rollers around which the screen is wound. Electronic blackboard according to 1. 4. A screen wound around a pair of left and right parallel rollers, and a projection formed on the same plane as the screen so as to cover left and right outer peripheral edges of the screen and close to the pair of right and left rollers. A pair of left and right rectangular cross-section frame bodies having a pair of right and left rectangular tube-shaped cross sections each having a pair of right and left cross-section square tube-shaped stands for holding and standing the screen in the floor direction and having upper and lower outer peripheral edges of the screen. An electronic device comprising: a pair of upper and lower holding frames having bent portions covering upper and lower outer peripheral edges of a screen and holding upper and lower ends of a pair of the rollers, being rearward of the screen and close to the screen. blackboard.