JP2521670Y2 - Electronic blackboard - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electronic blackboard, and more particularly to an electronic blackboard in which paper can be easily attached to and removed from the writing film surface.

2. Description of the Related Art An image writing surface is composed of a film belt movably wound between a pair of rollers, and an image such as a character is written on the belt.
A roller is rotationally driven to move a portion on which an image is written, or an optical reading device is moved along a film belt to be read by the optical reading device, and the read image information is recorded by an electrophotographic process. The so-called electronic blackboards that have been recorded in [1] have become popular recently.

FIG. 3 is a diagram showing the appearance of an example of an electronic blackboard. A film belt 1 for writing an image is supported on a pair of legs 2 having wheels for moving on both sides. A pair of rollers 4 and 5 are provided vertically on both ends of the frame 3 as shown in FIG. It is configured as an endless belt that is wound around, and can be moved between the front side and the rear side by rotating the roller 5 by the motor 6. An optical reading device 7 is movably supported by the frame 3 at its upper and lower ends and is movable in the left-right direction along the film belt surface.

FIG. 5 is a diagram showing the configuration of the optical reading device 7,
Inside the housing 8 having a U-shaped cross section, a light source lamp 9 extending in the vertical direction, a reflecting shade 10, a lens array 11 on which reflected light from the surface of the film belt 1 which is slit-irradiated by these, is incident, and an image thereof is formed. CCD1 in position
2. It consists of a metal plate 13 for blocking reflection and electric field. The image on the film belt 1 is read by the CCD 12 by moving the optical reading device 7 along the surface of the film belt 1. The image information read by the CCD 12 is input to the recording device 15 (FIGS. 3 and 4), recorded by the electrophotographic process, and discharged. The above-mentioned reading and recording are instructed by the operation display unit 16 provided in the recording device 15.

When the reading device 7 is moved to the left and right to read, it is possible to provide the reading device on the front side (writing side) of the electronic blackboard and make one end stand by at the time of writing. It is also possible to set it up.

It is also possible to fix the reading device at a fixed position (for example, either end) and read the image on the film belt while moving the film belt at a constant speed or winding the film belt around the winding shaft. .

Now, in the conventional electronic blackboard, when a paper or the like is stuck on the surface of the film belt on which characters are to be written as indicated by the reference numeral 23 in FIGS. 3 and 4, it is usual to stick it with an adhesive tape. In that case, there is a drawback that it is difficult to peel off after use, and that after the peeling, the adhesive remains on the film belt surface and stains adhere. To avoid this, it may be possible to press with a magnet, but in that case it is necessary to provide a magnetic plate such as an iron plate on one side in contact with the back side of the film belt, and the electronic blackboard itself becomes heavy, and the cost There is a drawback that it becomes high. In addition, the magnet obstructs the movement of the reading device during image reading.

The present invention eliminates the above drawbacks of the conventional electronic blackboard,
We provide an electronic blackboard that has a simple structure that allows you to easily and reliably attach and remove paper on which characters are written without using adhesive tape or magnets, leaving no traces and preventing image reading. The task is to do.

Means for Solving the Problems In order to solve the above problems, the electronic blackboard according to the present invention uses a dielectric film as a film belt for writing an image on the electronic blackboard, and forms an unequal electric field near the surface of the film belt. It is characterized in that it is provided with a device.

Action Since the electronic blackboard of the present invention is configured as described above,
A charge pattern can be formed on the film belt surface of the electronic blackboard. For example, when a charge pattern composed of + and − charges shown in FIG. 6 is formed on the surface of the dielectric film, +
Electric lines of force are formed between the negatively charged portion and the negatively charged portion as shown in the figure, and an unequal electric field is formed in the vicinity of the surface of the film belt 1. The electric field causes the paper which is the dielectric material to be formed. 23 is electrostatically adsorbed on the surface of the film belt 1 by Fx caused by Maxwell's stress tensor, and is held without being displaced.

The device for forming the charge pattern is formed, for example, by providing an electrode for applying an alternating voltage in contact with the film belt and providing a counter electrode on the back surface of that portion of the belt. An electrode for applying an alternating voltage and a counter electrode can be provided so as to be movable together with the reading device, and a charge pattern can be formed on the entire surface of the film belt. It is also possible that one of a pair of rollers around which the film belt is wound is made of a conductor to form an opposing electrode, and a voltage applying electrode is provided on the surface of the film belt wound around this roller. . With the latter method, one roller can also serve as the counter electrode, which is useful for cost reduction. In addition, the load of the reading device is lightened, stable traveling is possible, and the number of parts is reduced to achieve cost reduction.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a part of a reading device of an embodiment in which the present invention is applied to an electronic blackboard having the above-described structure. Therefore, members having the same functions as those of the conventional electronic blackboard described with reference to FIG. 5 are designated by the same reference numerals, and different points will be mainly described.

An electrode roller 21 for applying an alternating voltage for forming a charge pattern is provided outside the reflection and electric field blocking sheet metal 13 in the housing 8 of the reading device 7 so as to come into contact with the surface of the film belt 1 over the entire width of the film belt 1. And is connected to an alternating voltage generating power source (not shown). The film belt 1 faces the electrode roller 21 through the film belt 1.
A counter electrode roller 22 that is grounded is provided in contact with the back surface of the. These rollers 21 and 22 are pivotally supported by the housing 8 so as to move integrally with the reading device 7. A dielectric sheet is used as the film belt 1.
In order to form a charge pattern on the film belt 1 using these devices, a charge pattern forming switch is provided on the operation display unit 16 (see FIG. 1).

Therefore, when the charge pattern forming switch is turned on, the reading device 7 moves at a constant speed, and at the same time, an alternating voltage is applied to the film belt 1 from the alternating voltage generating power source through the electrode roller 21 to form a striped pattern on the film belt 1. Charge pattern is formed.

When the charge pattern is formed on the dielectric film, an unequal electric field is formed near the surface of the film, and the electric field electrostatically attracts the paper, which is the dielectric.

When it is desired to record the image described on the paper together with the image described on the film belt 1 on the same paper, by turning on the print switch of the operation display unit 16 as in the conventional case, the operation described above is performed. The image on the film belt 1 and the image on the paper are read by the reading device 7 by the
Recorded at 15.

If the paper is peeled off from the film belt 1 after recording, no adhesive is used, so there is no stain due to the adhesive remaining on the film belt, and it is read like when pressing with a magnet. It is not necessary to prevent relative movement between the device and the film belt 1, and it is not necessary to provide a magnetic plate such as an iron plate in contact with the back surface of the film belt.

Next, FIG. 2 shows a main part of another embodiment in which the present invention is applied to the electronic blackboard having the structure described above. In this example,
The alternating voltage applying electrode roller 31 for forming the charge pattern is adapted to be pressed against the surface of the film belt of the portion of the film belt 1 which is wound around the driving roller 5 by the spring 32 so as to be driven to rotate. An alternating voltage generating power source (AC power source in the illustrated embodiment) is applied to the voltage applying electrode roller 31.
33 is connected. The drive roller 5 is made of a conductive material such as metal and is grounded. The film belt 1 is made of a dielectric material as in the above embodiment. Although the reading device and the recording device are not shown in FIG. 2, the same device as the conventional electronic blackboard described above is provided.

When a paper is to be pasted on the film belt 1 of the electronic blackboard of this embodiment, when the charge pattern forming switch of the operation display unit 16 is pushed down, the alternating power supply 33 is turned on and the electrode roller 31.
Voltage. At the same time, the motor 6 is driven, the drive roller 5 is rotated, the film belt 1 is moved at a predetermined speed, and the electrode roller 31 pressed against this is driven to rotate, and the drive roller 5 is used as an opposite electrode to form the surface of the film belt 1. An unequal electric field is formed in the vicinity, and paper can be attracted.

The procedure for recording the image on the film belt and the image written on the paper is the same as that in the above-described embodiment.

In the embodiment shown in FIG. 2, the electrode roller 31 of the charge pattern forming device is separated from the reading device, and the position is fixed so as to contact the driving roller 5 via the film belt 1 at one end of the electronic blackboard. Although the example provided is shown, the reading device is fixed to one end of the electronic blackboard, and in the electronic blackboard of the method of reading by moving the film belt,
It is also possible to provide the charge pattern forming electrode roller in the reading device so as to face the drive roller via the film belt. In the case of the method of winding the film belt around the winding shaft at the time of reading, it is necessary to devise so that the paper adsorbed on the film belt does not come off.

In the latter embodiment, the roller around which the film belt is wound can also be used as the counter electrode of the charge pattern forming device, so the number of members is reduced, the configuration is simplified, the cost is reduced, and the reading device is moved. In the case of the method of making it possible, the load is lightened and stable running can be easily achieved.

The charge pattern formed on the film belt may be a checkerboard pattern or the like other than the striped pattern.

As described above, according to the present invention, the film belt surface, which is the writing surface of the electronic blackboard, can be made to adsorb paper stably without using an adhesive or a magnet, and can be stably conveyed with the film belt, or the reading device can be moved. Thus, the image described on the film belt and the image on the paper can be recorded, and the adhesive is not left on the film belt to be soiled or the reading operation is not hindered by the magnet. Further, according to the latter embodiment, since the roller for winding the film belt can also serve as the counter electrode for forming the charge pattern, the structure is simplified, the driving load of the reading device is reduced, and the cost is reduced. To do.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of an essential part of an electronic blackboard according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a configuration of an essential part of an electronic blackboard according to another embodiment of the present invention, and FIG. FIG. 4 is a perspective view showing the external appearance of an electronic blackboard to which the present invention is applied, FIG. 4 is a perspective view showing the internal structure by removing the frame and legs, and FIG. 5 is a perspective view showing the structure of the reading device. FIG. 6 is an explanatory view for explaining the action of the charge pattern formed on the dielectric film. 1 ... Film belt 4,5 ... Roller 6 ... Drive motor 7 ... Reading device (reading means) 8 ... Reading device housing 15 ... Recording device 16 ... Operation display section 21,22; 31,33 ... ... Charge pattern forming means 21, 31 ... Electrode roller 22 ... Opposing electrode 33 ... Alternating voltage generating power supply

Front page continuation (72) Kenichi Mizuma Inventor Kenichi Mizuma 1-3-6 Nakamagome, Ricoh Co., Ltd. (72) Inventor Mitsuru Mamitsuka 1-3-6 Nakamagome, Ota-ku, Tokyo In Ricoh Company (72) Inventor Noriyuki Kimura 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company Ricoh (72) Inventor Kazushige Taguchi 1-3-6 Nakamagome, Ota-ku, Tokyo Stock Company In Ricoh (56) References Japanese Patent Laid-Open No. 64-966 (JP, A)

Claims (2)

(57) [Scope of utility model registration request] 1. A roller movably suspended between a pair of rollers,
A film belt capable of writing and erasing images such as characters, reading means for reading the image written on the surface of the film belt, and recording means for recording the image information read by the reading means by an electrophotographic process. The electronic blackboard having the above-mentioned, wherein a dielectric film belt is used as the film belt, and a charge pattern forming device for forming an unequal electric field is provided near the surface of the film belt. 2. The charge pattern forming device comprises a counter electrode formed by using one of the pair of rollers as a conductor, and a surface of the film belt within a range wound around the roller. The electronic blackboard according to claim 1, further comprising an electrode that is in contact with and applies an alternating voltage.