JPH08156490A - Electronic chalkboard - Google Patents

Abstract

PURPOSE: To provide an electronic chalkboard which is capable of maintaining a function as the chalkboard while automatic writing is performed in the electronic chalkboard equipped with a drawing function. CONSTITUTION: An indiction sheet 1 is stretched on four pieces of rollers 3, 4, 5, 6. The rollers 5, 6 are pivotally attached to a roller supporting member 9 and integrally moved in the vertical direction. When the rollers 5, 6 are moved to the lower part, the relative position of the indication sheet 1 and a writing means 8 is changed even if the indication sheet 1 is not turned. Automatic writing is performed on the indication sheet 1 through the writing means 8 by utilizing this relative displacement. Thereby, the sheet 1 existing in the display position at a time of automatic writing is in a stopping state and visual recognition and writing due to handwriting are performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard which prints out the contents written on a display board, and more particularly to an electronic blackboard having a drawing function.

[0002]

2. Description of the Related Art A general electronic blackboard is one in which a text or a graphic is written by a marker pen or the like on a screen sheet serving as a display board, and is read out and printed out. In addition to the function of making a hard copy of the written image, it would be very convenient if an image of an original document, etc., which was facilitated in advance, could be automatically displayed (written) on the display board, and it would be very convenient to hold meetings etc. efficiently. It will be possible.

Therefore, various electronic blackboards having a drawing function have been proposed. For example, Japanese Unexamined Patent Publication No. 4-142999 discloses an electronic blackboard having a drawing function by an XY plotter. Further, Japanese Patent Application Laid-Open No. 3-9896 discloses an electronic blackboard having an inkjet drawing function. Furthermore, Japanese Utility Model Laid-Open No. 2-24994 discloses an electronic blackboard having a drawing function of an impact printer system.

[0004]

However, in the conventional electronic blackboard having a drawing function, while the drawing (automatic writing) on the display board is being performed, handwriting on the board and confirmation of the display contents are possible. I could not do it, and during that time there was a problem that the function as a blackboard was impaired.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic blackboard which solves the above-mentioned problems in a conventional electronic blackboard having a drawing function and can maintain the function as a blackboard even during automatic writing. And

[0006]

According to the present invention, in the electronic blackboard having writing means for automatically writing on a display sheet, at least a roller for supporting and conveying the display sheet is provided. Two pairs are provided, the display sheet is supported at a display position by one pair of the at least two pairs of rollers, and another pair of rollers is stretched at the display position among the at least two pairs of rollers. The writing means is provided so as to be movable at a right angle to the roller axis in a plane parallel to the display sheet, and the writing means is arranged in the vicinity of the display sheet stretched by the pair of movable rollers and is movable. The problem is solved by the writing means writing on the display sheet by the relative displacement of the display sheet and the writing means due to the movement of the pair of rollers.

In order to solve the above problems, the present invention provides an electronic blackboard having writing means for automatically writing on a display sheet, in which two pairs for supporting and conveying the display sheet are provided. The rollers are arranged to face each other, and
A pair of intermediate rollers is provided between the pair of rollers so as to be movable at a right angle to the roller axis in a plane parallel to the display sheet stretched at the display position, and the distance between the pair of intermediate rollers is opposite to each other. And the display sheet is stretched so as to be conveyed between the intermediate roller pair, and the display sheet is stretched so as to be conveyed between the intermediate roller pair. It is proposed that the writing means writes on the display sheet by relative displacement with the writing means.

Further, in order to solve the above-mentioned problems, the present invention provides at least one roller of the intermediate roller pair so as to be movable in a direction connecting both rollers, and the movable rollers are provided with a roller gap therebetween. It is proposed to have a pressurizing mechanism that pressurizes in a narrow direction.

Further, according to the present invention, in order to solve the above-mentioned problems, a display erasing member is disposed on the outer peripheral surface of the intermediate roller pair on the upstream side in the transport direction of the display sheet with respect to the writing means. Then, it is proposed that the display on the display sheet is erased when the roller provided with the display erasing member slides in pressure contact with the display sheet.

[0010]

A pair of rollers other than the roller pair for supporting the display sheet at the display position is provided so as to be movable in a direction perpendicular to the roller axis in a plane parallel to the display sheet stretched at the display position. Further, the writing means is arranged in the vicinity of the display sheet stretched by the pair of rollers. When the pair of rollers is moved, the relative position between the writing unit and the display sheet changes without rotating the display sheet. Therefore, by using this, the writing unit writes on the display sheet. Do. Therefore, since it is not necessary to rotate the display sheet even at the time of writing, the display sheet at the display position is in a stopped state, and it is possible to confirm the display and write by handwriting.

Other functions will be apparent from the description of the embodiments below.

[0012]

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

FIG. 1 is a front view of an electronic blackboard according to an embodiment of the present invention. In the electronic blackboard shown in this figure, reference numeral 1 is a white board sheet which is a writing and display screen, reference numeral 2
Is a hard copy ejecting unit, 33 is a document reading unit, and 34 is an operating unit. Characters and figures written by a marker pen on the whiteboard sheet 1 are read by a reading device provided in the blackboard device, printed by a printer also provided in the blackboard device, and ejected to the hardcopy ejecting section 2. . In the document reading unit 33, the document is read while being conveyed by a document reading unit (not shown). The read original image is written on the white board sheet 1 by a writing unit described later. In this embodiment, an ink jet system is used as the writing means.

2 and 3 are side sectional views schematically showing the internal structure of the electronic blackboard. As shown in this figure,
The white board sheet 1 is stretched around four rollers 3 to 6 to form an endless loop. The roller 3 is a sheet conveying roller, and is rotationally driven by the sheet drive motor 7. When the sheet conveying roller 6 rotates, the white sheet 1 rotates clockwise in FIG. Therefore, the white board sheet 1 in the visible range in FIG. 1 moves from the bottom to the top.
A reading device for reading an image written on the white sheet 1 is provided near the driven roller 4, but it is omitted in the drawing. The movable rollers 5 and 6 are both pivotally attached to the roller support member 9. The roller support member 9 is provided so as to be movable in the vertical direction in FIG. Therefore, the movable rollers 5 and 6 can move up and down integrally with the roller support member 9 while keeping a distance from each other, and can move from the position shown in FIG. 2 to the position shown in FIG. The roller support member 9 is provided with a rack 9a, and the rack 9a meshes with a gear 11 fitted to the rotation shaft of the roller moving motor 10. Therefore, when the roller moving motor 10 rotates, the movable rollers 5 and 6 move together with the roller supporting member 9. A writing device 8 is provided near the white sheet 1 on the side connecting the movable rollers 5 and 6. The writing device 8 uses the ink jet system as described above, but of course, another recording system can be adopted. Note that reference numeral 20
Is a backboard that serves as a backing sheet for handwriting.

By the way, when the movable rollers 5 and 6 move from the position shown in FIG. 2 to the position shown in FIG. 3, the writing device 8 and the white board sheet 1 move relatively even if the white board sheet 1 does not rotate. Will be done. Using the relative movement of the writing device 8 and the white board sheet 1, automatic writing (vertical direction) to the white board sheet 1 is performed. The writing device 8 is movable in the width direction of the whiteboard sheet 1 (direction perpendicular to the drawing), and when writing in the vertical direction is completed, the writing device 8 is moved horizontally (in the widthwise direction of the whiteboard sheet 1). While moving by a digit,
The movable rollers 5 and 6 return to the position shown in FIG. 2 and then move to the position shown in FIG. 3 again to perform the next writing. By repeating this operation, writing on one side is performed. Alternatively, the writing device 8 first moves in the horizontal direction to write one line, then the movable rollers 5 and 6 are moved by a predetermined amount to perform a line feed, and this operation is repeated to perform writing on one side. You may do it.

Since it is not necessary to rotate the white board sheet 1 during the writing operation, the white board sheet 1 at the display position is in a stopped state, and the contents can be visually recognized and the handwritten writing on the white board sheet 1 is possible. The function as a blackboard is maintained.

It should be noted that the white board sheet 1 is not rotated in the vertical direction of the blackboard but is rotated in the horizontal (left / right) direction so that the movable rollers 5 and 6 are moved in the horizontal (left / right) direction. By doing so, it is possible to write in one row (horizontal direction) by the relative movement of the writing device 8 and the white board sheet 1. Further, if a writing device having a size in the entire widthwise or vertical direction of the whiteboard sheet 1 is provided,
It is also possible to write on one side at a time by the relative movement of the writing device 8 and the white board sheet 1 each time.

In order to improve the drawing quality on the white board sheet 1 during automatic writing by the writing apparatus 8, as shown in FIG. 4, a backing is applied to the inside of the loop of the white board sheet 1 at a position corresponding to the writing apparatus 8. It is also possible to provide a writing assisting member 21 that becomes

By the way, when the movable rollers 5 and 6 are moved in order to move the writing device 8 and the white board sheet 1 relative to each other, such a space is required inside the electronic blackboard, which causes an increase in the size of the device. Will be. Therefore, an electronic blackboard in which the writing device 8 and the whiteboard sheet 1 can be relatively moved while suppressing the increase in the size of the device as much as possible is proposed as another embodiment of the present invention as follows.

As shown in FIGS. 5 and 6, the electronic blackboard of this embodiment is provided with two pairs of rollers around which the white sheet 1 is wound and a pair of movable rollers arranged between them. . That is, the sheet conveying roller 3, the auxiliary rollers 4, 25 and 26, the movable roller (intermediate roller) 12,
It is 13. The movable rollers 12 and 13 are pivotally attached to the roller support member 14, respectively. This roller support member 14 is
In the figure, it is provided so as to be movable in the vertical direction. Therefore, the movable rollers 12 and 13 can move up and down integrally with the roller support member 14 while keeping a distance therebetween, and can move from the position shown in FIG. 5 to the position shown in FIG. A writing device 8 is provided near the white sheet 1 on the side connecting the auxiliary rollers 25 and 26. This writing device has the same configuration as the writing device of the above-mentioned embodiment.

A wire (or a timing belt) 16 is fixed to the roller support member 14.
The wire 16 is stretched around pulleys 22 and 23.
One pulley 23 is fitted into the rotary shaft of the roller movement motor 15. Therefore, by rotating the pulley 23 by the roller moving motor 15, the roller supporting member 14 can be moved up and down together with the movable rollers 12 and 13.

When the movable rollers 12 and 13 move from the position shown in FIG. 5 to the position shown in FIG. 6, the white sheet 1 pressed by the two rollers changes the position relative to the writing device 8. The relative movement between the writing device 8 and the white board sheet 1 is utilized to perform automatic writing on the white board sheet 1. The writing method is the same as in the above embodiment. When this writing is performed, the white board sheet 1 is not rotated, and the white board sheet 1 in the display position does not move. Therefore, it is possible to visually recognize the recorded contents on the whiteboard sheet 1 and write by hand on the whiteboard sheet 1, and the function as a blackboard is maintained.

In this embodiment, the writing device 8 and the white board sheet 1 can be moved relative to each other without taking a large space in the device. Therefore, the device can be downsized. Further, according to the configuration of this embodiment, the relative movement amount of the white board sheet 1 is larger than that of the above-described embodiment, so that the writing range by automatic drawing can be expanded, and writing can be performed more efficiently. It will be possible.

FIG. 7 shows a structure for applying proper tension to the white board sheet 1 to eliminate slack. As shown in this figure, the roller support member 24 for supporting the movable rollers 12 and 13 is provided with a slit 24a. The shaft of one movable roller 13 is slidably provided in the slit 24a. The other end of a pressure spring 17 having one end fixed to a roller support member 24 is attached to the shaft of the movable roller 13. As a result, the movable roller 13 is biased toward the other movable roller 12, and a predetermined tension can be applied to the white board sheet 1. Therefore, the slack of the sheet can be eliminated and the drawing quality can be improved. Also, by providing a separate member, the white board sheet 1
Since it is not necessary to apply tension to, it is possible to suppress an increase in cost.

FIG. 8 shows a structure for automatically deleting the display contents on the white board sheet 1. As shown in this figure, an erasing member 18 made of a cloth-like or sponge-like material is arranged on the outer peripheral surface of one movable roller 12. When the erasing member 18 slides in pressure contact with the surface of the white board sheet 1, unnecessary display contents can be automatically erased. The movable roller on which the erasing member 18 is arranged is the movable roller 12 located on the upstream side of the writing device 8 in the conveyance direction of the white sheet 1.

[0026]

As described above, according to the electronic blackboard of the present invention, automatic writing can be performed without rotating the display sheet, so that the function as a blackboard can be maintained even during automatic writing. .

According to the configuration of claim 2, the same function can be exhibited without increasing the size of the device. Also,
The range of automatic writing can be expanded.

According to the third aspect of the present invention, since the pressing mechanism for urging the intermediate roller pair so as to narrow the roller interval therebetween is provided, it is possible to improve the drawing quality by eliminating the slack of the display sheet.

According to the structure of claim 4, it is possible to automatically erase the written display contents, eliminating the need for manual erasure, and preventing overwriting due to forgetting to erase. Therefore, operability can be significantly improved.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the electronic blackboard of the present invention.

FIG. 2 is a partial cross-sectional view schematically showing the internal structure of the electronic blackboard.

FIG. 3 is a partial cross-sectional view showing a state where a movable roller is moved from the state shown in FIG.

FIG. 4 is a partial cross-sectional view showing the vicinity of a writing assisting member of the electronic blackboard.

FIG. 5 is a partial sectional view illustrating another embodiment of the present invention.

FIG. 6 is a partial cross-sectional view showing a state in which a movable roller is moved in the embodiment.

FIG. 7 is an explanatory view showing a tension applying mechanism of a white board sheet in the embodiment.

FIG. 8 is an explanatory diagram showing a display erasing mechanism in the embodiment.

[Explanation of symbols]

 1 white board sheet (writing / display screen) 2 hard copy discharging section 3 sheet conveying rollers 4, 25, 26 driven rollers 5, 6, 12, 13 movable roller 7 sheet drive motor 8 writing device 9, 14 roller supporting member 10, 15 roller moving motor 16 wire 17 pressure spring 18 erasing member 21 writing assisting member 33 original reading unit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuo Hirono 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd.

Claims (4)

[Claims] 1. An electronic blackboard having a writing means for automatically writing on a display sheet, wherein at least two pairs of rollers for supporting and conveying the display sheet are provided, and one of the at least two pairs of rollers is provided. The display sheet is supported at a display position by a pair of rollers, and another pair of rollers among the at least two pairs of rollers is perpendicular to the roller axis in a plane parallel to the display sheet stretched at the display position. The writing means is movably provided, and the writing means is arranged in proximity to the display sheet stretched by the pair of movable rollers, and the display sheet and the writing by the movement of the pair of movable rollers. An electronic blackboard in which the writing means writes on the display sheet by relative displacement with respect to the insertion means. 2. An electronic blackboard having writing means for automatically writing on a display sheet, wherein two pairs of rollers for supporting and conveying the display sheet are arranged to face each other, and the two pairs of rollers are arranged. A pair of intermediate rollers is provided so as to be movable at a right angle to the roller axis in a plane parallel to the display sheet stretched at the display position, and the distance between the pair of intermediate rollers is set to face each other. The display sheet is arranged so as to be narrower than the roller interval between the pair of rollers, and the display sheet is stretched so as to be conveyed between the intermediate roller pair, and the display sheet and the writing by the movement of the intermediate roller pair. An electronic blackboard wherein the writing means writes on the display sheet by relative displacement with the means. 3. A pressure mechanism for movably providing at least one roller of the pair of intermediate rollers in a direction connecting both rollers, and pressing the movable rollers in a direction in which a distance between the rollers is narrowed. The electronic blackboard according to claim 2, wherein: 4. A display erasing member is arranged on an outer peripheral surface of the intermediate roller pair on the upstream side in the conveying direction of the display sheet with respect to the writing means, and the roller on which the display erasing member is arranged is The electronic blackboard according to claim 2, wherein the display on the display sheet is erased when the display sheet is pressed and slid on the display sheet.