JPH0245877Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an image forming apparatus such as an electrophotographic copying machine, and particularly to a copying machine that directly copies characters, figures, etc. written on a blackboard.

[Prior art and problems]

Conventionally, in order to prevent people from transcribing characters, figures, etc. written on a blackboard into notebooks at meetings, lectures, etc., and to avoid mistakes caused by transcription, copying machines that directly copy what is written on a blackboard have been developed. It had been proposed.

A conventional example will be explained according to the drawings. Second
The figure is a configuration diagram showing an example of a conventional unit section. The blackboard unit section has a display surface 2b inside the housing 1b.
(hereinafter referred to as a blackboard sheet); a writing unit 30 that writes characters, figures, etc. on the blackboard sheet 2b; a reading unit 31 that reads the characters, figures, etc. written on the blackboard sheet 2b as optical images; and a roll around which the blackboard sheet 2b is wound. 31a, 31b, a winding roll A33 that winds up the blackboard sheet 2b, a winding roll B34, a backup board 35 that holds the writing surface of the blackboard sheet 2b, and a board lamp 36 that irradiates the blackboard sheet 2b with light in the reading section 31. It consisted of a board mirror 37, a board lens 38, etc., which guide a reflected light image obtained by light irradiation to a copying device (not shown).

In the conventional blackboard copying machine having the blackboard unit configured as described above, the board reading section 31 is configured parallel to the board writing section 30, and in order to reduce the weight and size of the blackboard unit,
The width W ₀ of the casing 1b could not be increased, and the board mirror 37 had to be placed close to the reading section 31.

Therefore, as shown by the two-dot chain line in FIG. 5, the length of the board mirror 37 had to be approximately the same as the width of the blackboard sheet 3.

As described above, in the conventional blackboard copying machine, the mirror for transmitting the image on the blackboard sheet is close to the reading section of the blackboard sheet, so the length of the mirror is required to be approximately the same as the width of the blackboard sheet. Therefore, it is extremely difficult to support such a vertically long mirror while keeping it flat.

Furthermore, such large mirrors are susceptible to twisting and are expensive.

Furthermore, since the distance between the mirror and the board lens becomes long, it is difficult to align the two.

At the same time, it was also difficult to integrate the mirror and board lens into a unit.

[Purpose of invention]

In view of the above-mentioned conventional drawbacks, the present invention moves the mirror that transmits the image of the blackboard sheet away from the reading section and places it close to the board lens, miniaturizes the mirror and lens, and creates an integrated unit structure for the optical system. An object of the present invention is to provide a blackboard copying machine that is easy to adjust.

[Key points of the idea]

According to the present invention, the above-mentioned object is a blackboard copying machine equipped with a display section having a belt-shaped display surface that can be written and erased, and a copying section capable of copying an image on the display surface. It is configured to be movable between a writing surface position where writing and erasing can be performed and a reading surface position where an image on the display surface is read, and the writing surface and the reading surface are disposed substantially orthogonally, and the read image is read on the display surface. It is characterized in that an optical path for exposing the copying section is formed after the writing surface position.

[Example of idea]

An embodiment of the present invention will be described in detail below with reference to the drawings. Fig. 1 is a block diagram of the blackboard unit of the present invention, Fig. 2 is a block diagram of a conventional blackboard unit, and Figures 3a and b are overall perspective views showing the operating state of the blackboard copying machine of the present invention. 4 are block diagrams of the copying machine, and FIGS. 5 and 6 are schematic diagrams of the blackboard optical system.

The blackboard copying machine is composed of a blackboard unit 1 and a copying machine 2.

The blackboard unit 1 consists of a housing 1a, a blackboard sheet 3, a blackboard optical system 4, a take-up device 5, and a backup board 7.
It is composed of a board lamp 8, a first mirror 9, a second mirror 10, and a board lens 11 in b.

The blackboard sheet 3 is made of a white resin sheet with good releasability, and can be easily written on and erased with a felt pen or the like.

5 and 6 are schematic configuration diagrams of the blackboard optical system 4. FIG. The image illuminated by the board lamp 8 passes through the first mirror 9, the second mirror 10, and the board lens 11 according to the blackboard optical path 29, and is sent to the copying machine 2.
The image is formed on the photoreceptor drum 12 inside. The first mirror 9 is inclined at 45 degrees with respect to the blackboard optical path 29 and refracts the image light of the blackboard sheet 3 perpendicularly backward with respect to the writing surface of the blackboard sheet 3. The refracted image light is further bent downward by 90 degrees by the second mirror 10, passes through the exposure window 16 of the copying machine 2 by the board lens 11, and reaches the photosensitive drum 12 inside the machine.

The first mirror 9, the second mirror 10, and the board lens 11 are integrally fixed to a support member (not shown) while maintaining a predetermined relationship.

On the other hand, as shown in FIG. 1, the winding device 5 transports the blackboard sheet 3, which is wound in large numbers around a winding roll 6a at one end of the housing 1a, to feeding rolls 5a, 5b, 5c, and 5d at the other end. The film is then wound up by a winding roll 6b.

Further, in the process of being wound up, the blackboard sheet 3 is formed by the feed rolls 5c and 5d to form a surface perpendicular to the writing section 3a of the blackboard sheet, and is irradiated by the board lamp 8 at the reading section 3b of the blackboard sheet. .

The take-up roll 6b rotates at a constant speed by a drive mechanism (not shown), and winds up the blackboard sheet 3 at a constant speed. As a result, characters written on the blackboard sheet 3 are reduced in size by the blackboard optical system and projected onto the photosensitive drum 12 of the copying machine. After this image exposure step is completed, by pressing the rewind button, the blackboard sheet 3 can be rewound again to its original position by the take-up roll 6a.

The copying machine 2 is placed on a copying machine stand 2a,
Position A and position B by rail 2c (see Figure 3)
It is installed so that it can be taken in and out between the two. Copy machine 2
As shown in FIG. 4, the photosensitive drum 12, the charger 13 arranged around it, and the blank lamp 1
4, a developing device 15, a transfer device 20, a cleaner 21, a fixing section 22 that fixes the image on the copied paper, a discharge section 23 that discharges the paper to the outside of the machine, and a document glass 19.
It is composed of an optical scanning mechanism and the like that scans the document placed thereon.

The optical scanning mechanism includes a halogen lamp 24 that illuminates the original, a first mirror 25 for copying, a second mirror 26 for copying, a lens 27 for copying, and an original glass 19.

Furthermore, an exposure window 17 and a shutter 18 are provided on the top surface of the copying machine 2, through which the optical path from the blackboard optical system 4 enters. Therefore, when the copying machine 2 is pulled out to the A position and normal copying is performed, the exposure window 17 from the blackboard optical path is shielded by the shutter 18.

Further, when the copying machine 2 is returned to the position B in FIG. 3 to perform blackboard copying, the shutter 18 is structured to automatically open.

The operation of the blackboard/copying machine configured as above will be explained.

First, when copying an image written on the blackboard sheet 3, the copying machine 2 is stored in position B as shown in FIG. 3a. Then, as shown in FIG. 4, the shutter 18 of the copying machine 2 is operated, the exposure window 17 is opened, and the blackboard light path 29 is allowed to enter. Here, images of characters, figures, etc. written on the blackboard sheet 3 for meetings, lectures, etc., are provided perpendicularly to the writing section 3a by winding up the blackboard sheet 3 at a constant speed by the winding roll 6b. Reading section 3
Pass through b. At this time, it is irradiated by the board lamp 8, and the reflected light is reflected from the first mirror 9 and the second mirror 1.
0. The image is projected through the board lens 11 onto the photosensitive drum 12 which is uniformly charged by the charger 13.

As a result, the electrostatic latent image formed on the photosensitive drum 12 is copied onto the paper by the developing, transferring, and fixing mechanism, and is discharged from the paper discharge section 23 to the outside of the machine.

After copying, the blackboard sheet 3 is returned to its original position by pressing the rewind button and driven by a motor or the like.

Next, when performing normal copying, the copying machine is pulled out to position A as shown in FIG. Make copies of books.

At this time, since the exposure window 17 is closed by the shutter 18, light from outside the copying machine does not enter the machine and adversely affect the image.

The original on the original glass 19 is irradiated by a halogen lamp 24 of a normal optical system for a copying machine, and the reflected light is reflected by a first copying mirror 25, passes through a copying lens 27, and is reflected by a second copying mirror, where it is exposed to light. is projected onto the body drum 12.

In the blackboard unit 1 of the present invention, since the reading part 3b of the blackboard sheet is perpendicular to the writing part 3a, the blackboard optical path 29 can be made parallel to the writing part 3a surface without using a mirror. I can do it. Therefore, the distance from the reading section 3b to the first board mirror 9 can be increased along the writing section 3a surface, and the length of the first mirror 9 can be shortened accordingly.

Furthermore, it is not necessary to increase the length of the surface of the reading section 3b, and the width _W1 from the backup board 7 to the back side of the casing 1a can be made thinner.

Furthermore, as can be seen from FIGS. 5 and 6, since the first mirror 9 and second mirror 10 for the board are arranged near the lens 11 for the board, they can be made into an integral structure. The blackboard optical system 4 can be easily attached and adjusted.

[Effect of idea]

As described above in detail, according to the blackboard copying machine of the present invention, the display mirror and the display lens are brought into contact with each other to form an integral structure, so that adjustment of both is easy.

Furthermore, since the writing surface and the reading surface of the display section are configured to be perpendicular to each other, the dimensions of the display section can be made thin, and the device can be made compact in structure.

Furthermore, since the mirror is placed far away from the copying position of the display section and close to the display lens, the vertical dimension of the mirror can be shortened, making it easy to attach and hold the mirror and reducing production costs. can.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the blackboard unit of the present invention.
Figure 2 is a configuration diagram of the conventional blackboard unit section;
Figures a and b are overall perspective views showing the operating state of the blackboard copying machine of the present invention, Figure 4 is a configuration diagram of the copying machine, and Figure 5.
6 are schematic configuration diagrams of the blackboard optical system used in the present invention. 1... Blackboard unit, 1a... Housing, 2... Copying machine,
2a... Copying machine stand, 3... Blackboard sheet, 3a... Writing section, 3b... Reading section, 4... Blackboard optical system, 5...
Winding device, 5a, 5b, 5c, 5d... feeding roll, 6a, 6b... winding roll, 7... backup board, 8... board lamp, 9... first mirror, 10... second mirror, 11... board lens, 12...photosensitive drum, 13...charger, 14...
Blank lamp, 15...Developer, 16...Exposure window,
17...Exposure window, 18...Shutter, 19...Original glass, 19a...Original platen, 20...Transfer device, 21...Cleaner, 22...Fixing section, 23...Sheet discharge section, 24...Halogen lamp, 25...First copying unit Mirror, 26... Second mirror for copying, 27... Lens for copying, 29... Blackboard optical path.

Claims (1)

[Scope of utility model registration request] In a blackboard copying machine comprising a display section having a writable and erasable belt-like display surface and a copying section capable of copying an image on the display surface, the display surface has a writable and erasable writing surface position and the display surface. The writing surface is configured to be movable between a reading surface position for reading an image on the surface, the writing surface and the reading surface are arranged substantially orthogonally, and an optical path for exposing the read image to the copying section is configured to be movable between the writing surface and the reading surface position. A blackboard copying machine characterized by being formed at the rear of the position.