JPS63231995A - Electronic blackboard device having automatic enlargement recording function - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention reads an image of characters, two figures, etc. written on a sheet-like writing medium, and records the read image information on the paper. The present invention relates to electronic whiteboards, and particularly relates to an electronic whiteboard device with an automatic enlargement recording function that can record content read from a small document onto an enlargement recording medium.

[Prior art and problems to be solved by the invention] Most of conventional electronic blackboards of this type have a single function of reading an image on the surface of the electronic blackboard, reducing the read image information and recording it on recording paper. It is equipped with the following. For this reason, there is no need to take notes of images written on a writing medium at meetings, etc., which is useful in this respect, but on the other hand, it is also possible to report characters, figures, etc. drawn on paper, etc. In this case, the content must be manually written down on the display member (hereinafter also referred to as a writing medium) of the electronic blackboard, which is an extremely troublesome task.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and provides a method for automatically enlarging and recording image information on a small document read by a reading device on a writing medium. The manuscript must be written in a vertical A.
4. Horizontal writing is common, and vertical writing is advantageous if it is to be enlarged as is, but the present invention provides an electronic blackboard with an enlarged display function that is easy to use in actual use and has a relatively simple structure. It is in.

[Example] Hereinafter, an example of an electronic whiteboard embodying the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, a chassis frame 1 of this electronic blackboard has a substantially box-like shape with an open front, and a pair of support legs 2 and a pen tray 3 are provided at the bottom thereof.

A horizontally elongated writing medium 55 for handwriting is guided by left and right film guide rollers 61 and taken up by film winding rollers 56 and 57, and is connected to a motor via a timing belt 60. The structure is such that a driving source is provided by 58 and 59. On the other hand, inside the writing medium 55, left and right enlarged recording media 5a and 5b are provided separately in parallel in a manner that divides the writing medium size into left and right halves, and each is connected to a pair of upper and lower film drive rollers 15 and 9, respectively. The left and right enlarged recording media 5a are rotatably supported within the chassis frame 1 at predetermined intervals.
, 5b are driven by a motor 1B via a timing belt 16. That is, as shown in FIG. 8, the film drive roller 15a is divided into left and right halves.

Clutches 62a are provided on the left and right sides of 15b, respectively.

62b, the driving force of the motor 18 is transmitted to the film drive roller 15a, 15b, or both, so that the enlarged recording media 5a, 5b can be fed. The writing medium 55 and the enlarged recording medium may be laminated with a thin film made of a material such as Teflon that will not be immersed in solvent chemicals, etc., or
Or coated, the base is generally 10
A polyester film with a thickness of approximately 0 μm is used, and is made of a material that can withstand repeated use even when written on the surface with a water-based marker or erased with an eraser, or even against the impact of the impact-type wire dot of this method. It has become.

As shown in FIG. 3, the first reading element 10 is provided in the middle of the rear part of the chassis frame 1, and is illuminated by a fluorescent lamp 11 with an image of characters 2 and figures written on the writing medium 55. The image is read by the reading element 10 in a reduced state through the lens 13. A recording device 6 is provided at the lower left side of the chassis frame 1, and the image information read by the first reading element 10 is recorded in a reduced form on a predetermined sheet of paper by this recording device 6.
The paper is stored in a vapor tray 52 provided at the bottom of the recording device 6.
It is designed to be discharged.

The small document reading device 70 is housed in the same unit as the recording device 6, and when a document for reading is inserted from the small document insertion lower, images such as characters 2 and figures written on the paper are transferred to this second document. After being read by the reading element 71, the paper is also discharged onto the paper tray 52. Impact type wire dot print head 2 for enlarged recording
8. Film cassette 29 and ink ribbon cassette 3
0 is provided in the rear lower part of the chassis frame 1 so that the image information read by the second reading device 71 is recorded on the writing medium 5 in an enlarged state using the water-based ink 44 by the wire dot head 28. It has become. still,
The enlargement ratio of this image is set to be approximately the same as the reduction ratio obtained by image reading and reduction recording by the first reading element 10.

FIG. 4 shows a view from above of the wire dot print head 28 shown in FIG. film 34
As the carriage 31 carrying the print head 28 moves, the film feed drive roller 35 rotates to feed the film, and together with the driven roller 36, the endless film 34 is sent from the right to the left at the head tip. It is a mechanism for feeding the film into the film cassette 29. This film 34 is made of polyester having a thickness of about 1Q to 15μ and is used to block the ink ribbon 39 and the print head 28 in order to prevent water-based ink 44, which will be described later, from adhering to the dot wire and entering the dot print head 28. It consists of film. It is necessary that the film cassette 29 is completely free from the impact of the print head 28 even if it is used many times, but this is impossible, so the entire film cassette 29 is replaced after a certain amount of use. In addition to preventing the aqueous ink 44 from penetrating into the print head 28, this membrane 34 also serves to reduce the impact of the dot wire print head 28 on the writing medium 5, and to prevent printing with a small diameter dot wire during enlarged recording. The aim is to make the dot diameter larger than the dot wire diameter by striking three ink ribbons together with this film 34.

Since the water-based ink 44 is required to dry quickly, water evaporates very easily, and if the enlarged recording is not used, the exposed ink ribbon 39 will not have the ink evaporate and dry. It is impossible to prevent it. Therefore, an ink ribbon cassette 30 having approximately the same length as the enlarged recording medium 5 is installed as a stand-alone arrangement behind the dot print head 28 and the film cassette 29. The ink ribbon 39 is guided by a ribbon guide 33 at the front of the print head 28, and in order to prevent the ribbon 39 from touching the enlarged recording medium 5 and staining the enlarged recording medium 5, the ink ribbon 39 is made of a thin stainless steel plate, etc. A mask 32 with holes is provided between the ink ribbon 39 and the enlarged recording medium 5. The ink ribbon 39 is fed by being pulled out from the ink ribbon cassette 30 by the ribbon feed drive roller 37 as the print head 28 records. The ink ribbon 39 sent by the ribbon feed drive roller 37 is fed into the ink ribbon cassette 30 by ribbon winding rollers 42, 43. The ink ribbon 39 is then twisted by a half turn and guided through a slight gap 50 in the cassette 30 into the water-based ink 44 via the ribbon roller 48. The ink ribbon 39, which has been fully immersed in the water-based ink 44, is pulled out of the water-based ink again, and the excess ink is squeezed out by the ink squeezing roller 49 and the ribbon roller 48, and the water-based ink 44 is further squeezed by the ribbon tension spring 41 to obtain a suitable ink. Set the impregnation rate to 44. The ink ribbon is then pulled out from the ink ribbon cassette 30 again and used for recording. In order to prevent moisture in the ink 44 from evaporating from within the ink ribbon cassette 30, the inlet section 46 and the outlet section 4 of the ribbon cassette are
7 is sealed with a film or the like, and the ink ribbon 39 is moved in and out while applying pressure. Furthermore, replenishment of the water-based ink 44 into the ink ribbon cassette 30 is as follows:
Remove the ink injection port cover 40 and inject from this round hole with a special aqueous ink bottle. Although not shown in this explanatory diagram, the dot print head 28 and the film cassette 2
9 is placed on the carriage 31, and when the enlarged recording medium 5 is scanned left and right to form an image with dots, the dot print head 28 is preferably about a 9-pin head in consideration of printing speed and dot diameter. If you ignore it, it's 18 pins.
A 24-pin head may also be used. Furthermore, in order to increase the recording speed, it is more practical to use a multi-head type that uses a plurality of such serial heads, or a shuttle type that uses 1-pin heads arranged horizontally at equal intervals of 10 to 15 cities. It may be true.

In the explanatory diagram of the present invention, the enlarged recording medium 5 is endless, so after the enlarged recording is displayed on the front and used, the enlarged recording medium 5 rotates from above to the rear as the next screen is recorded. sent downward. When the first print line of the front screen reaches just above the cleaning roller 20, the enlarged recording of the front side ends, so it is possible to return the front screen to the front and view it at any time. At this time, the cleaning roller 20 is separated from the enlarged recording medium 5 by a cleaning roller pressing mechanism (not shown) and passes by, so that the image on the enlarged recording medium 5 is not erased.

When the first and second screens are used and the next screen is to be recorded, the motor pulley 26 is rotated by the rotation of the motor 27 while the cleaning roller 20 is pressed against the enlarged recording medium 5 by the cleaning roller pressing mechanism. Timing belt 25. The image on the enlarged recording medium 5 is automatically erased by being decelerated and rotated counterclockwise via the pulley 24 and gears 23, 22, and 21. The material for the outer periphery of the cleaning roller 20 is made of soft felt, and must be carefully selected so as to prevent the enlarged recording medium 5 from being easily scratched and to withstand long-term erasure. A brush cleaner 54 is provided below the cleaning roller 20, and the brush cleaner 54 further cleans the enlarged recording medium 5, and at the same time comes into contact with the outer periphery of the cleaning roller 20 to remove ink scum attached to the outer periphery of the cleaning roller 20. It will be removed. This brush cleaner is also made of thin thread-like fibers and rotates clockwise at a higher speed than the cleaning roller to accomplish this purpose. The enlarged recording media 5a and 5b, which are divided into left and right halves, are printed by the single print head 28, and enlarged recording is executed on the screen as requested by designation on the operation panel 4. Note that cleaning rollers 20 for erasing are provided separately for the left and right enlarged recording media 5a and 5b, but in order to simplify the structure, a cleaning roller 20 for erasing is provided separately for the left and right enlarged recording media 5a, 5b.
A cleaning roller may be attached to 1 to constantly clean the enlarged recording section immediately before printing. Furthermore, the reason why the left and right enlarged recording media 5a and 5b are provided inside the writing medium 55 is a compromise plan to meet the two conflicting demands of a handwriting medium and enlarged recording, as stated in the purpose of the invention. In order to make it simpler, the enlargement recording medium is made endless and two of these are provided, so that there is only one drive unit and there are four enlargement recording units.In addition, it can be used for normal A4 vertically-shaped originals written horizontally. For left side 5a or right side 5
b, while using both the left side 5a and the right side 5b for a horizontally long original.

Next, the control circuit of the electronic whiteboard device configured as described above will be explained with reference to FIG.
) 72 oversees the entire control, and the CPU 72 includes a ROM 73 and a RAM for appropriately storing read image information.
74 is connected.

The ROM 73 stores programs and the like for controlling the overall operation of the electronic blackboard. The CPU 72 has a first
A reading device 10, a second reading device 71, a film position detector 75 installed in the chassis frame 1, and an operation panel 4 for commanding movement, reduction recording, and enlargement recording of the enlarged recording medium 5 are connected via an input interface 77. Then, various information and signals are input to the CPU 72. Further, the CPU 72 is connected via an output interface 78 to a recording device 6, an enlarged recording device 76 including a print head 29, etc., and moving motors 58, 59 for the writing medium 55.
, head movement motor 79, cleaner movement motor 27. It is connected to the respective drive circuits of the enlarged recording medium clutches 62a and 62b, and the CPU 72 drives and controls them.
Various stop signals will be output.

Next, the operation of the electronic blackboard configured as described above will be explained.

Now, when using this electronic blackboard at a meeting or the like, you can write letters, figures, etc. on the surface of the writing medium 55 with a water-based marking pen, or arbitrarily erase the letters, figures, etc. with an eraser. Be able to explain the contents of the agenda. When it is necessary to record an image of characters, figures, etc. written on the writing medium 55 on a paper, when the start button and the desired number of copies designation button on the operation panel 4 are operated, the motor 18 As the writing medium 55 is rotated, the writing medium 55 is moved to the left in FIG. 3, and the image on the writing medium 55 is reduced and read by the first reading element 10. This read image information is temporarily stored in the RAM 74, and the image information is recorded in a reduced form on a predetermined sheet of paper by the operation of the recording device 6. Therefore, the characters written on the writing medium 55.

There is no need to write down figures etc. on paper.

Note that in this embodiment, as described above, the first reading element 10
Since the image information read by is temporarily stored in the RAM 74, when multiple copies are required, the recording device 6 performs an operation in parallel with recording on paper based on the stored image information. Therefore, the first reading element 10 can read a new image, and the operation time can be shortened.

In addition, when recording and displaying characters, figures, etc. written on paper on the enlarged recording medium 5, when the paper is inserted into the small document insertion lower of the small document reading device 70, the characters 2 on the paper are
Images such as figures are read by the second reading device @7. Based on the read image information, the dot impact print head 28 uses water-based ink 44 to print on the enlarged recording medium 5a.

The image is enlarged and recorded on 5b. Therefore, there is no need to manually write down the characters, figures, etc. on the paper on the writing medium 55, making it convenient to use, and recording of image information on the enlarged recording medium 5a, 5b is also possible as described above. The meeting can be held in a short time using the wire dot method, allowing the meeting to proceed smoothly. Usually, handwritten blackboards in Japan are
Most of them are large-sized horizontally, and the electronic blackboard is 88cm tall.
Approximately 0 mm x 1280 mm horizontally is required. Now, if you want to enlarge it directly onto such a large screen, you will need to use a line head with a length of 880 mm and install it vertically. From a cost perspective, it is structurally advantageous to keep the line head as short as possible, and to install it horizontally. This is noticeable, for example, in electrophotographic systems, serial head scanning systems, shuttle head scanning systems, and the like. In addition, normally, manuscripts are written horizontally on A4 paper, so as shown in Figure 9, the image information written on the manuscript is stored on an enlarged recording medium that is divided into left and right halves. 5a
, 5b, and furthermore, image information written on a horizontally long document may be displayed across the left and right enlarged recording media 5a, 5b. Further, the left and right enlarged recording media 5a, 5b are connected to clutches 62a, 62b.
Since the images can be sent individually, it is also possible to display image information written on manuscripts of different lengths on each enlarged recording medium 5a, 5b.

Next is the writing medium 55, which is elongated as shown in FIG. 7, and the first side 55a to the fourth side 55d of the writing medium are opaque and serve as an enlarged recording medium 5a inside.

Although it is not possible to see through 5b, it is possible to read and record the handwritten contents using the reading element 10. The fifth side of the writing medium is transparent with an enlarged recording medium perspective view screen 55e. Incidentally, an opaque portion 55f is provided at the center to hide the connecting portion between the left and right enlarged recording media 5a and 5b. Since there is a transparent writing medium 55e on top of the enlarged recording mediums 5a and 5b, it is also possible to add notes there with a water-based marker to facilitate explanation.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and the configuration of each part can be arbitrarily changed and embodied without departing from the spirit of the invention.

"Effects of the Invention" As detailed above, the present invention provides a large writable writing medium and characters written on the writing medium.

In an electronic whiteboard device that is equipped with a device that reads images such as figures and a device that reduces the read image information and records it on a small recording medium, a small document reading device that reads small documents and a device that automatically reads the read contents. The device is equipped with a device that can enlarge the size of the writing medium and record it on one or both of the two enlarged recording media located inside the writing medium. It is possible to have an appropriate vertical blackboard size, and furthermore, depending on the form of the document, it is possible to use either or both of the two enlargement recording media for easy-to-read enlarged display.

[Brief explanation of the drawing]

FIG. 1 is an external view of an electronic whiteboard embodying the present invention, FIG. 2 is an enlarged vertical cross-sectional view taken along line A-A of the electronic whiteboard shown in FIG. 1, and FIG. 3 is a cross-sectional view taken along line D-D of FIG. 1. , FIG. 4 is an enlarged view of the part viewed from B in FIG. 3, FIG. 5 is a cross-sectional view of the ink ribbon cassette in FIG. 4, FIG. 6 is a block diagram of the control circuit of the electronic whiteboard of the present invention, and FIG. FIG. 8 is a perspective view showing a writing medium and an enlarged writing medium, and FIG. 9 is a diagram showing an example of an enlarged display according to the form of a manuscript. In the figure, 5 is an enlargement recording medium, 6 is a reduction recording device, 1
0 is a first reading element, 55 is a writing medium, and 71 is a small document reading device. Figure 1 Figure 3

Claims (1)

[Claims] 1. A large writable writing medium, a device for reading images of characters, figures, etc. written on the writing medium, and reducing the read image information to a small recording medium. An electronic whiteboard device equipped with a recording device, comprising: a small document reading device that reads small documents; and one of two enlarged recording media that automatically enlarges the read contents and is located inside the writing medium. or a device capable of recording on both sides.