JPS61235877A - Image forming device - Google Patents

Abstract

PURPOSE:To copy a picture which is drawn on a display surface to desired size by using frosted glass as part of the original glass of a copying part where an original is placed, forming an image of the picture on the display surface on the frosted glass, and taking its copy. CONSTITUTION:When the display part is copied, an original platen is moved to left and the frosted glass 8 is arranged right above the original copying exposure hole 5 of the copying part 2. Then, characters, a picture, etc., drawn on a display sheet 1a are irradiated by a halogen lamp 14 at the lighting part of the display part and their image is formed on the frosted glass 8 through mirrors 12a and 12b and a display part side lens 15. The image formed on the frosted glass 8 is projected on a photosensitive drum 13 by the optical system of the copying part 2 through a copying lens 4 to form an electrostatic latent image. The electrostatic latent image on the photosensitive drum 13 is made into a toner image by a known developing means and the image is copied to a form to obtain a copy image.

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 more particularly to an image forming apparatus that directly copies characters, figures, etc. written on a blackboard (display member). It is something.

[Prior art and problems]

Conventionally, at meetings, lectures, etc., we have eliminated the hassle of having people transcribe 9 characters, 8 figures, etc. written on display materials such as blackboards into notebooks, etc., to prevent mistakes caused by transcription. A copying device that directly copies written material has been proposed.

Regarding conventional examples, various copying machines have been proposed that can selectively copy an image written on a sheet serving as two display members and a document on a document table.

The above-mentioned copying machine is composed of a copying section and a display section, and the copying section is mounted so that it can be moved between a position for copying originals and a position for copying on a board by means of rails provided on the two display sections. .

The copying section is provided with nine display section copying exposure openings.

When copying on the platen, the built-in shutter is closed, and when copying on the 9 display area, open the shutter.

Introducing image exposure from the display sheet through the exposure opening,
An image was formed on a photoreceptor drum.

However, in conventional image forming apparatuses with such a configuration, the only thing that can be done is to reduce the characters, etc. on the two display sections using the display section optical system, form an image on the surface of the photoreceptor drum, and copy it onto paper of a predetermined size. could not.

Therefore, in order to copy onto sheets of different sizes, a variable magnification mechanism must be provided in the optical system of one display section, and the variable magnification mechanism of the copying section cannot be used.

Another disadvantage is that after copying a portion of the image on the display section 9, the copy must be used as a manuscript and enlarged or reduced in the copying section to the required size.

[Purpose of the invention]

In view of the above-mentioned drawbacks of the conventional art, the present invention scales the image written on the display surface to a desired size and copies it, and also uses both the optical system of the blackboard and the optical system of the copying machine to change the size of the image written on the display surface. An object of the present invention is to provide an image forming apparatus that can copy images.

[Key points of the invention]

In order to achieve the above object, the present invention provides an image forming apparatus having a display section having a writable and erasable display surface and a copying section for copying an image on the display surface. A part of the document glass to be placed is made of frosted glass, and the image on the display surface is formed on the frosted glass to perform copying.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to one drawing. FIG. 1 is a sectional view showing a copying section of an image forming apparatus according to the present invention.

As shown in FIG. 1, the copying section 2 includes a photoreceptor drum 13, a charger, a blank lamp, a developer, and a charger disposed around the photoreceptor drum 13.
It consists of a transfer device, a cleaner, a paper feed cassette, a paper feed roller, a timing roll, a fixing section that fixes the image on the copied paper, an ejection section that ejects the paper from the machine, an optical scanning mechanism, a document table, etc. .

The optical scanning mechanism exposes and scans the original image onto the photosensitive drum 13, and is composed of a 3° halogen lamp for irradiating the original, a copying mirror, a copying lens 4, and the like.

Here, on the upper surface of the copying section 2, an exposure opening 5 for copying an original is provided, and a document table consisting of an original glass 6 and an original mat door is provided in a movable manner. In addition, a part of the original glass 6 (the area indicated by diagonal lines in FIGS. 1 and 2) is located in the scanning direction of the original table.

A part extending long and thin in the right angle direction and not covered by the document pine door even when the document pine door is closed is formed of frosted glass 8, and a leading end indicating plate 9 is provided at the other end. When copying on two display surfaces, the document table moves all the way to the left.

The ground glass 8 portion of the original glass 6 moves to a position covering the original copying exposure opening 5 and is fixed.

The image light on the display surface is guided by the display optical system.

It is projected and imaged onto the ground glass 8 surface.

On the copying unit 2 side, the image on the display surface formed on the frosted glass 8 is used as a document 9 and a copying operation similar to normal document copying is performed (however, the document table remains fixed and does not move).
.

On the other hand, the 9-image forming apparatus is composed of two display sections 1 and a copying section 2, and the copying section 2 is mounted on a mounting beam 2b and is provided so as to be removable.

FIGS. 3(a) and 3(b) are perspective views showing the operating state of the image forming apparatus of the present invention.

In the figure, 8. When performing normal original copying.

Pull out the copying section 2 toward you and open the document mat 7.

Place the original on the original glass 6 and make a copy (see Figure 3 (a)
)reference).

When copying the 1 display section 1, push the copy section 2 to the back and copy the characters 1, figures, etc. written on the 1 display section (see Figure 3 (bl)). .

Figure 4 shows display section 1 and copy section 2 when copying two display sections.
FIG. In the case of display copying, the document table is moved to the left end, and the frosted glass 8 at the end of the document glass 6 is positioned directly above the document copying exposure opening 5 of the copying section 2.

Further, the above-mentioned ground glass 8 may be made of other semi-transparent materials as long as the projection light can be imaged and read from the back side.

Further, at the lower end of the second display section 1 and at the exit of the display section optical path, a light shielding member 10 is swingably supported.

A brush 10a is planted on the lower surface of the light shielding member 10.

Therefore, the exposure light from one display section 1 is not disturbed by surrounding light.

FIG. 5 is a side view showing the relationship between the display section 1 and the copying section 2. As shown in FIG. In the figure, the copying section 2 indicated by a solid line indicates a two-display section copying state, and the two-dot chain line indicates one normal copying state.

In addition, during the transition from normal copying to display copying, the light shielding member 10 is swingably provided, and a brush 1 is provided at the bottom.
0a, the document table of the copying section 2 will not come into contact with the light shielding member 10 and damage it.

The display section 1 includes a frame 17, a display sheet 1a, a display section optical system 18, and a winding device 19.

The display optical system 18 includes a halogen lamp 14, a mirror 12a, a mirror 12b, and a display surface side lens 15 in the nine display illumination sections.

The winding device 19 has a frame 17 as shown in FIG.
Feed rolls 20b and 20c each have a display sheet 1a wound in large numbers at one end thereof and the other end thereof.

The film is wound up with one take-up roll 21 via 20d.

Further, the display sheet 1a that has been taken up once is transferred to the feed roll 20.
c, 20d form a plane perpendicular to the frame 17,
The blackboard is illuminated by a halogen lamp 14 in the lighting section.

On the display surface of the display unit 1, a part of the 9 display sheet 1a appears, and a backup board 22 is provided on the back surface of the display sheet 1a, so that the display sheet does not bend even when written with a felt pen or the like. It becomes.

The winding roll 21 is rotated by a drive mechanism (not shown) and winds up the film 1a at a constant speed.

FIG. 6 is a schematic diagram showing the optical system of nine display sections.

The display sheet 1a, which moves while being wound up, is illuminated by a halogen lamp 14, and the reflected light of the image illuminated by the halogen lamp 14 is directed to the mirror 1 along the optical path 11 for the display section 9.
2a, Mirror 12b9 Through the lens 15 on the display side, the frosted glass 8 provided at one end of the document glass 6 of the copying section 2
imaged on top.

The image of the display surface formed on the frosted glass 8 is.

Mirror of copying section 2, copying lens 4. The electrostatic latent image reaches the photoreceptor drum 13 via the mirror and forms an electrostatic latent image (the first
(see figure). Here, the copying lens 4 is a zoom lens, and the copying magnification can be changed by simply moving the lens barrel position of the copying lens 4 while keeping the mirror position fixed.

Next, the operation of the image forming apparatus configured as described above will be explained.

First, when performing normal original copying, as shown in FIG. , copying lens 4. An image is formed on the photosensitive drum 13 via a mirror.

The electrostatic latent image formed on the photoreceptor drum 13.

It is developed into a toner image using developing devices located around the area.

After being transferred onto paper by a transfer device, it is ejected from the machine after undergoing a fixing process.

In addition, when copying one display area, as shown in FIG. Place it directly above.

The character 9 image written on the 0 display sheet 1-1a is irradiated with a halogen lamp 14 in the illumination section of the 9 display section 1, and the 9 display section optical system 18 illuminates the mirrors 12a, 12b, etc.
Via the display unit side lens 15.

An image is formed on ground glass 8.

The image formed on the ground glass 8 is formed on the photosensitive drum 13 by the optical system of the copying section 2 via the copying lens 4, thereby forming an electrostatic latent image.

The electrostatic latent image on the photoreceptor drum 13 is converted into a toner image by a known developing means and transferred onto a sheet of paper.

It is considered a copy image.

In addition, in the present invention, even if the image is on one display section.

Since an image is formed on the photosensitive drum 13 through the optical system of the copying section 2, it can be reduced to any magnification using the copying lens 4, which is a zoom lens.

〔Effect of the invention〕

According to the image forming apparatus of the present invention configured as described above, characters written on one display section can be displayed at B4°A4°B5. Copies can be made on any size paper such as A5.

In addition, it is possible to change the magnification of an image on the display surface without providing a variable magnification lens for one display section as a separate scratch.

Furthermore, there is no need to go through the trouble of copying the image of one display section to a predetermined size, such as A4, and then changing the size using a copying machine, and it is possible to directly copy the image to the desired size.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a copying section of an image forming apparatus according to the present invention. FIG. 2 is a plan view of a document table used in the present invention. FIGS. 3(a) and 3(b) are overall perspective views showing the operating state of the image forming apparatus of the present invention. FIG. 4 is a front view showing the relationship between the display section and the copying section when performing three-display section copying. FIG. 5 is a side view showing the relationship between the display unit and the copying unit. FIG. 6 is a schematic diagram showing the optical system of nine display sections. FIG. 7 is a sectional view showing the inside of the second display section. 1...Display section. 1a...Display sheet 2...Copying section. 3...Halogen lamp: 4...Copying lens. 5...Exposure port for copying originals. 6... Original glass. 7... Manuscript cloak. 8...frosted glass. 9...Tip instruction board. lO... Light shielding member. 10a... Brush. 11... Optical path for display section. 12a, 12b... (two. 13... Photosensitive drum. 14... Halogen lamp. 15... Display section side lens. 17... Frame. 18... Display section optical system. 19. ... Winding device. '20a, 20b, 20c, 20d---Feed roll. 21.23... Winding roll. 22... Backup board. Patent applicant Casio Computer Co., Ltd. Same as above
Casio Electronics Co., Ltd. 1B1 Figure 2 Figure 3 (α) Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In an image forming apparatus having a display section having a writable and erasable display surface and a copying section for copying an image on the display surface, a part of the document glass on which the document is placed in the copying section is made of frosted glass. An image forming apparatus characterized in that the image on the display surface is formed on frosted glass and copied.