JPH10291397A - Electronic blackboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent winding nature of a sheet by altering a winding direction of the sheet. SOLUTION: A writing sheet 2 is read at a character or a drawing written thereon by a reader 16 while being taken up by a take-up roller 11. After the read information is once stored in a memory, it is printed on a heat sensitive sheet 6. To prevent winding nature of the sheet 2, the rotating direction of the roller 11 is alternately inverted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic blackboard apparatus capable of reading characters and figures written on a sheet by a reading unit which moves relatively to the sheet and printing the same on recording paper such as thermal paper. Things.

[0002]

2. Description of the Related Art In a conventional electronic blackboard device, Japanese Utility Model Appln.
As disclosed in Japanese Patent No. 164453, characters and figures written on a sheet can be copied onto recording paper.

[0003]

However, the conventional electronic blackboard device as described above has a problem that the sheet has a curl and the sheet floats up during use and is difficult to use.

Accordingly, an object of the present invention is to provide an electronic blackboard device in which a sheet is unlikely to have curl.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has means for changing a winding direction of a sheet.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described.

FIG. 1 is a perspective view showing the appearance of an electronic blackboard device according to an embodiment of the present invention, wherein 1 is a housing of an electronic blackboard main body, 2 is a flexible opaque sheet made of a water-based marker or the like. It is a writing sheet that can be written and erased with a writing instrument. Reference numeral 3 denotes a handle attached to one end of the writing sheet 2, and reference numeral 4 denotes a lid of a printer unit inside the housing 1, which is attached to the housing 1 so as to be openable and closable. Is set. Reference numeral 5 denotes an operation panel having a sheet winding key and a copy key.

FIG. 2 is a sectional view of an electronic blackboard device according to an embodiment of the present invention. In the figure, 11 is a winding roller for winding the writing sheet, 12, 13, 14, and 15 are rollers that rotate with the conveyance of the writing sheet 2,
The roller 12 and the roller 13 hold the writing sheet 2 therebetween. The roller 15 presses the sheet 2 against the wall 51 in a state where the housing 1 is attached to the wall 51 by a metal fitting (not shown), thereby preventing the sheet 2 from floating from the wall 51. Reference numeral 16 denotes a reading unit that optically reads characters and figures written on the sheet 2 and converts them into electric signals. Reference numeral 17 denotes a sensor provided at the opening 7 of the housing 1, and detects the completion of winding of the writing sheet 2 by detecting the handle 3. Reference numeral 19 denotes a thermal head for recording characters and graphics read by the reading unit 16 on the thermal paper 6, and reference numeral 18 denotes a platen.

FIG. 4 is a block diagram of the electronic blackboard apparatus shown in FIG. 2, and 21 controls the whole apparatus such as winding of the sheet 2 and reading / printing of the contents written on the sheet 2. It is a control unit. 22 is the winding roller 11
Is an electromagnetic clutch which is turned on / off by an instruction from the control unit 21, and the driving force of the motor 22 is transmitted to the winding roller 11 via the electromagnetic clutch 23. Therefore, the electromagnetic clutch 23
Is turned on, the take-up roller 11 is connected to the motor 2
In the state where the electromagnetic clutch 23 is turned off, the winding roller 11 idles with respect to the rotation axis (not shown) of the roller 11. Reference numeral 24 denotes a rotation detection unit such as an encoder that detects the rotation of the roller 12, and outputs a rotation detection signal every time the roller 12 rotates by a predetermined amount (that is, each time the writing sheet 2 is fed by a predetermined amount). Reference numeral 25 denotes a storage unit using a random access memory, which stores a rotation direction flag Fg for determining a rotation direction of the motor 22 and an electric signal output from the reading unit 16. Reference numeral 26 denotes a motor for driving the platen 18.

The operation of the electronic blackboard device of the present embodiment configured as described above will be described below with reference to the flowchart of FIG. However, it is assumed that the writing sheet 2 is currently drawn out of the opening 7 for writing.

First, when detecting that the copy key on the operation panel 5 has been operated (S1), the control unit 21 checks the flag Fg in the storage unit 25 (S2), and if the flag Fg is on, S3. If it is off, the process of S4 is performed. S
In 3, after turning on the electromagnetic clutch 23, the motor 22 is rotated in a direction in which the winding roller 11 rotates in the direction of arrow N in FIG. In S4, the electromagnetic clutch 2
3 is turned on, and the winding roller 11 is turned
Rotates the motor 22 in the direction of rotation in the direction of arrow M in FIG. Winding roller 1 by motor 22
When 1 rotates, the writing sheet 2 is taken up by the take-up roller 11 as shown in FIG. After that, the control unit 21 reads characters and graphics written on the writing sheet 2 by the reading unit 16 and transfers the characters and graphics to the storage unit 25 (S5).

The reading process in S5 is performed as follows. That is, when the writing sheet 2 is taken up by the rotation of the take-up roller 11, the roller 12 rotates at a speed corresponding to the transport speed of the writing sheet 2. The rotation detecting unit 24 issues a signal each time the roller 12 rotates by a predetermined amount, and the control unit 21 outputs a reading signal to the reading unit 16 in synchronization with the signal emitted from the rotation detecting unit 24. The reading unit 16 reads characters and the like on the writing sheet 2 for one line in response to the read signal,
Output to 1. One line of data sent to the control unit 21 is recorded in the storage unit 25.

After writing the data for one line into the storage unit 25, the control unit 21 checks the state of the sensor 17, and if the handle 3 is not detected, returns to S5 to read the data for the next one line. Done. S5 and S6 above
Is repeated until winding of the writing sheet 2 is completed.

When the sensor 17 detects the completion of the winding of the writing sheet 2 in S6, the control section 21 turns off the electromagnetic clutch 23 and stops the rotation of the motor 22 (S7). Then, the control unit 21 inverts the flag Fg in the storage unit 25 (S8). Thereafter, the control section 21 drives the motor 26 to feed out the thermal paper 6, and prints on the thermal paper 6 with the thermal head 19 according to the data stored in the storage section 25 (S9).

[0015]

According to the present invention, the means for changing the rotation direction of the roller for winding the writing sheet is provided, so that the sheet is less likely to be curled.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an appearance of an electronic blackboard device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the electronic blackboard device.

FIG. 3 is a sectional view of the electronic blackboard device.

FIG. 4 is a block diagram of the electronic blackboard device.

FIG. 5 is an operation flowchart of the electronic blackboard device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Writing sheet 6 Thermal paper 11 Winding roller 16 Reading part 19 Thermal head

Claims (1)

[Claims] 1. A long writing sheet, a take-up roller for taking up one end of the writing sheet as a free end and taking up the other end, a motor for driving the take-up roller, and writing on the writing sheet. An electronic blackboard device, comprising: reading means for reading written characters and graphics; means for recording data read by the reading means on recording paper; and means for changing the rotation direction of the motor.