JPH05289195A - Copying device - Google Patents

Abstract

PURPOSE:To realize the copying device provided with OHP function without making a special mechanism necessary to the copying machine main body so as not to hinder the lowering of cost or miniaturization. CONSTITUTION:The device is provided with an original platen formed on the copying machine main body 5 provided with translucency, a pressing plate 1 to bring a document into a pressurized contact with this original platen, an exposure lamp 7 provided to be freely mobile along the original platen within the copying machine main body 5, an exposure lamp fixing means fixing this exposure lamp 7 to an arbitrary position, a plate lens 2 attached to the pressing plate 1 and by which the light from the exposure lamp is diffused and a projecting optical system 3 attached to be mobile to the copying machine main body 5 by an arm 6 where transmitted light from the document placed on this plate lens 2 is enlarged and projected to a screen outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine having an OHP (overhead projector) function.

[0002]

2. Description of the Related Art First, FIG. 14 shows the basic principle of OHP. In the OHP, basically, the transmitted light of an original on an OHP sheet is refracted by the convex lens 21 and the transmitted light is reflected by the reflection plate 22 in the screen direction to perform enlarged projection. Also,
FIG. 15 shows a general structure of an OHP. The projection unit is composed of two convex lenses 23a and 23b and a reflector 24, and the illumination unit is composed of a light source 25 and a flat plate lens 26.

When an OHP for projecting such an original on a screen is magnified, when it is not used, it is stored by covering the whole with a cover or folding an arm that supports the projection optical system. It was still required, and it was usually necessary to have a suitable mount for the OHP in use.

Therefore, a proposal has been made in which the copier has an OHP function to eliminate the need for a storage space or a table on which the OHP is placed to save space in an office or a conference room and to improve the added value of the copier itself. There is.

In the copying machine disclosed in Japanese Patent Laid-Open No. 61-116341, a device incorporating a light source, a reflecting mirror, a lens, etc. is mounted on the original plate of the copying machine, and an external image is formed on the original plate. The image is made to appear or the original on the original table is projected on the screen.

Further, the copying machine disclosed in Japanese Patent Laid-Open No. 62-99777 guides light from a document illuminated by a light source to a photoconductor through an imaging lens and forms an image of the document on the photoconductor. In a copying apparatus for obtaining a copied image, light emitted from an imaging lens is guided to the outside by using a reflecting mirror or the like and projected on a screen.

Further, the copying machine disclosed in Japanese Patent Laid-Open No. 63-132976 is provided with a mechanism for changing the angle of the Fresnel reflector or the reflector of the exposure lamp inside the copying machine, and the original is reflected by the light reflected by the Fresnel reflector. The original on the table is uniformly illuminated and transmitted from below, and the transmitted light is projected on the screen by the projection optical system.

[0008]

However, the one disclosed in Japanese Patent Laid-Open No. 61-116341 as a first conventional example includes a light source in a device mounted on a platen, and the device itself. Function as an OHP.

A second conventional example is Japanese Patent Laid-Open No. 62-9.
In the device disclosed in Japanese Patent No. 9777, a mechanism for the OHP function such as a switching mirror for changing the optical path of light exiting the imaging lens must be newly provided in the main body of the copying machine and the cost of the main body of the copying machine. And hinders miniaturization. Further, it is based on a flash exposure copying machine, and further consideration is required for application to a more general slit exposure copying machine.

Further, as a third conventional example, JP-A-63-
In the apparatus disclosed in Japanese Patent No. 132976, a mechanism for OHP function such as a Fresnel reflecting mirror and an angle changing mechanism of an exposure lamp reflector must be newly provided in the copying machine body, and the cost of the copying machine body must be increased. And hinders miniaturization. In particular, when used as a copying machine, a space for retracting the Fresnel reflecting mirror so as not to interfere with the optical path is required inside the copying machine body, which is a major obstacle to downsizing.

As described above, in the conventional example, the light source of the copying machine is not used effectively, or a new mechanism must be provided in the copying machine body, which hinders cost reduction and downsizing in the copying machine body. Becomes

The present invention does not require a special mechanism in the main body of the copying machine so as not to hinder cost reduction and size reduction.
An object is to provide a copying machine having an HP function.

[0013]

According to a first aspect of the present invention, a translucent original placing table formed on the main body of the copying machine, a pressure plate for pressing the original onto the original placing table, and the main body of the copying machine. An exposure lamp movably provided inside the original placing table, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, and a flat plate attached to the pressure plate for diffusing the light of the exposure lamp. The copying machine is composed of a lens and a projection optical system that magnifies and projects the transmitted light from the original placed on the flat lens onto an external screen and is movably attached to the copying machine body by an arm.

According to a second aspect of the present invention, a translucent document placing table formed in the main body of the copying machine, a pressure plate for pressing the original document against the original placing table, and the original placing table in the copying machine body. An exposure lamp movably provided along the exposure lamp, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, a flat plate lens attached to the pressure plate to diffuse the light of the exposure lamp, and the flat plate lens The projection optical system, which magnifies and projects the transmitted light from the original placed on the external screen onto the external screen, is movably attached to the main body of the copying machine by the arm, and the magnification of the image is magnified by the operation unit provided in the main body of the copying machine. The copying machine is composed of a zooming means for performing.

According to the third aspect of the present invention, a translucent original placing table formed in the copying machine main body and a pressure plate mounting metal fitting of the copying machine main body are detachably attached so that the original is placed on the original placing table. A pressure plate to be in pressure contact, an exposure lamp movably provided in the main body of the copying machine along the original placing table, an exposure lamp fixing means for fixing the exposure lamp to an arbitrary position, and an exposure lamp mounted on the original placing table. A flat lens that is placed and diffuses the light of the exposure lamp, and a projection that is transmitted from a document placed on the flat lens in an enlarged scale on an external screen and is detachably attached by the pressure plate attachment bracket by an arm. The copying machine is composed of an optical system.

According to a fourth aspect of the present invention, a translucent document placing table formed in the main body of the copying machine, a pressure plate for pressing a document against the original placing table, and the original placing table in the copying machine body. An exposure lamp movably provided along with, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, a first flat plate lens attached to the pressure plate for diffusing the light of the exposure lamp, A second flat plate lens that is removably attached to the pressure plate and is positioned so as to face an external screen, and the second flat plate that reflects transmitted light from a document placed on the first flat plate lens. A copying apparatus including a projection optical system having a reflection plate arranged at a position leading to the lens and enlarging and projecting the transmitted light from the document on the screen.

[0017]

According to the first aspect of the present invention, the light of the exposure lamp stopped below the flat lens by the exposure lamp fixing means is diffused by the flat lens to illuminate the original on the flat lens more uniformly from below. That is, the exposure lamp illumination for slit exposure can provide illumination equivalent to illumination by a flat light source. The transmitted light of the document is projected on the screen by the projection optical system. Further, since the projection optical system is movably attached to the main body of the copying machine, it can be made compact by retracting it so as not to get in the way when it is not used as an OHP.

According to the second aspect of the present invention, in addition to the first aspect of the present invention, the operating unit provided in the main body of the copying machine serves as a scaling means for changing the size of the image. The image can be easily scaled by the department.

According to the third aspect of the present invention, the light of the exposure lamp stopped below the flat lens by the exposure lamp fixing means is diffused by the flat lens, and the original on the flat lens is illuminated from below evenly. The transmitted light is projected on the screen by the projection optical system. Also, when not used as an OHP, the projection optical system is removed from the pressure plate mounting metal fitting and the pressure plate is attached to the projection optical system, which is no different from a general copying machine.

According to the fourth aspect of the invention, the first flat plate lens diffuses the light of the exposure lamp stopped below the first flat plate lens by the exposure lamp fixing means, and the original document on the first flat plate lens is diffused. Is evenly illuminated from below. The transmitted light is reflected by the reflection plate, changes its direction, is guided to the second flat plate lens, and is projected on the screen. When not used as an OHP, the first flat plate lens, the second flat plate lens, and the reflection plate may be housed in the pressure plate, which is the same as a general copying machine.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, the overall structure of this embodiment is shown in FIG. This figure shows the state when used as an OHP,
A flat plate lens 2 is provided inside the pressure plate 1 along a contact glass surface serving as a document placing table, a projection optical system 3 is provided above the flat plate lens 2, and a joint 4 and an arm 6 provided on a side surface of the copying machine body 5 are used. It is supported. Also,
A control unit (not shown) including a program for stopping the exposure lamp 7 at the center of the flat lens 2 is provided as exposure lamp fixing means.

A part of the pressure plate 1 is a lid 8 as shown in FIG.
With the lid 8 removed, the built-in flat lens 2 can be exposed. The flat lens 2 has the same properties as a convex lens, and is adapted to diffuse the slit-shaped light of the exposure lamp 7 in the scanning direction so that the original is uniformly illuminated from below. The projection optical system 3 has two convex lenses 9a and 9a as shown in FIG.
It is formed by b and one reflecting mirror 10. In order to change the rotation and angle of the projection optical system 3, the joint 4 is formed by two support rods 11 and one rotating portion 12 as shown in FIG. 4, one of which is the projection optical system 3 and the other of which is the above-mentioned. It is connected to the arm 6. The arm 6 is rotatably attached to the side surface of the copying machine body 5 so as to be housed in the side surface of the copying machine body 5 together with the projection optical system 3. Further, a motor (not shown) built in the arm 6 and a program for moving the projection optical system 3 up and down by an enlargement / reduction button of an operation panel 13 as an operation unit incorporated in the control unit perform image magnification change. It is provided as a means. 5 and 6 show control flowcharts when used as an OHP. Further, FIG. 7 shows a stored state when used as a copying machine.

In such a configuration, when the exposure lamp 7 stops moving toward the center of the flat lens 2 and is turned on by a control unit (not shown), the slit-shaped light of the exposure lamp 7 is diffused and refracted by the flat lens 2 and is then projected onto the flat lens 2. Illuminate the placed original evenly from below. The transmitted light that has passed through the document is projected by the projection optical system 3 onto an external screen. Further, when the enlargement / reduction button of the operation panel 13 is operated, the projection optical system 3 moves up and down, and the image on the screen is enlarged or reduced. When not used as an OHP, the projection optical system 3, joint 4, and arm 6 are housed on the side surface of the copying machine body 5.

As described above, according to this embodiment, since the projection optical system 3, the joint 4 and the arm 6 are accommodated on the side surface of the copying machine main body, space is saved and a special mechanism is provided in the copying machine main body 5. Since the OHP function can be provided without a need, the cost reduction and downsizing of the copying machine are not hindered. Further, the operation panel 13 of the copying machine body 5 can easily enlarge and reduce the image.

Further, in addition to the above description, FIGS.
The operation of the OHP mode will be described based on the control flowchart shown in FIG.

First, when the OHP switch is turned on, the exposure lamp 7 stops moving toward the center of the flat lens 2 by the exposure lamp moving routine which serves as the exposure lamp fixing means. next,
It is confirmed whether the flat lens 2 is set, that is, whether the cover 8 of the pressure plate 1 is removed. If not, an error is displayed and a loop is made. If it is, the error display is erased. Further, it is confirmed whether or not the arm 6 is set, that is, whether or not the arm 6 is erected, and if not, an error is displayed and the loop is made. If it is, the error display is erased and a motor (not shown) is driven to project. The optical system 3 is moved to a predetermined height. Since the preparation for projection is completed, the copy button is turned on to check whether the copy button has been pressed. If the button has not been pressed, the process loops. If it is pressed, the exposure lamp 7 lights and the document is projected. Next, in a routine as a variable magnification means, it is confirmed whether or not the enlargement button is pressed, and if it is pressed, the motor is driven only when the projection optical system 3 is not at the highest position and the projection optical system 3 is raised by 1 cm. Further, in the routine as a variable magnification means, it is confirmed whether or not the reduction button is pressed, and if it is pressed, the motor is driven only when the projection optical system 3 is not at the lowest position and the projection optical system 3 is lowered by 1 cm. Next, it is confirmed whether or not the OHP switch is OFF. If the switch is OFF, the exposure lamp 7 is turned off to move to the standby position for copying to be stored and returned to the copy mode. If the cancel button is pressed, the process jumps to the enlargement button confirmation process of the routine to turn off the exposure lamp and turns on the copy button.

In this way, the operation panel 1 of the copying machine main body
By 3, the projection and enlargement / reduction of the image can be easily performed and repeated until the OHP switch is turned off.

Next, a second embodiment of the present invention will be described with reference to FIGS. 8 and 9. The same parts as those shown in the above-mentioned embodiments are designated by the same reference numerals (the same applies to the following embodiments). FIG. 8 shows the overall configuration of this embodiment. This figure shows a state when used as an OHP, in which the flat lens 2 is placed on the contact glass surface, the projection optical system 3 is provided above the flat lens 2, and the arm is attached to the joint 4 and the pressure plate mounting member 15. It is supported by 16. Further, a control unit (not shown) including a program for stopping the exposure lamp 7 at the center of the flat lens is provided as the exposure lamp fixing means. FIG. 9 shows a state in which the pressure plate 14 is removed from the copying machine main body 5.

In such a structure, the exposure lamp 7,
The original is projected on the screen by the flat lens 2 and the projection optical system 3 in the same manner as in the above embodiment. Further, the flat lens 2 is removed, the arm 16 is detached from the pressure plate attachment fitting 15, and the pressure plate 14 is attached, so that it becomes the same as a general copying machine.

As described above, according to the present embodiment, since the OHP function can be provided without providing a special mechanism in the copying machine main body 5, there is no hindrance to cost reduction or downsizing of the copying machine main body. It can be the same size as a normal copying machine. Further, all optical systems required for the OHP except the exposure lamp 7 provided in the main body of the copying machine are not required to be added later, and thus can be made optional.

Further, a third embodiment of the present invention will be described with reference to FIGS. FIG. 10 shows a pressure plate 17 of the present embodiment, which is a lens cover 18, a first flat plate lens 2, and a second flat plate lens 1 serving as a projection lens from below.
9. The reflection plate 20 having the opposite surface to the reflection surface forming the surface of the pressure plate 17 is formed in a laminated manner.

One end 20a of the reflection plate 20 has the pressure plate 1
7 is rotatably attached to the main body, and the other end 20b is rotatably attached to the one end 19a of the second flat plate lens 19. Further, the first flat plate lens 2 is fixedly attached along the lowermost surface of the pressure plate 17 excluding the lens cover 18. When used as an OHP, the lens cover 18 is removed and the reflector 20
11, the one end 20b is pulled upward, and the second flat plate lens 19 is vertically erected as shown in FIG.
Is slanted so as to reach the exit surface of the first flat lens 2 and the entrance surface of the second flat lens 19. OHP in Figure 12
FIG. 13 shows an overall state when used as a copying machine, and FIG. 13 shows an overall state when used as a copying machine. Further, the copying machine main body is provided with a control unit (not shown) having a program for stopping the exposure lamp 7 at the center of the first flat plate lens 2 as exposure lamp fixing means.

In such a structure, when the exposure lamp 7 is stopped moving to the center of the first flat plate lens 2 and is turned on,
The slit-shaped light of the exposure lamp 7 is diffused and refracted by the first flat plate lens 2 to uniformly illuminate the original placed on the first flat plate lens 2 from below. The transmitted light that has passed through the document is reflected by the reflection plate 20, changes its direction, enters the second flat plate lens 19, and is enlarged and projected on the screen by the second flat plate lens 19.

As described above, according to this embodiment, since the OHP function can be provided without providing the copying machine main body with a special mechanism, the cost of the copying machine main body and the miniaturization of the copying machine main body are not hindered. It can have the same dimensions as the copier. Further, all the optical systems required for the OHP except the exposure lamp 7 provided in the copying machine body 5 are provided in the pressure plate 17, so that the option can be obtained by exchanging the pressure plate. Further, since the second flat plate lens 19 and the reflection plate 20 are folded and stored in the pressure plate 17, storage and setting are easy.

[0035]

According to the first aspect of the present invention, a flat lens is provided in the pressure plate and a projection optical system is provided outside the main body of the copying machine, so that a special mechanism such as an optical system for OHP is provided in the main body of the copying machine. Since the OHP function is provided without providing the above, the cost reduction and downsizing of the main body of the copying machine will not be hindered. Further, since the optical system can be housed together with the fixing means, the space can be saved. In addition, copier and OHP
Since both functions are provided, an OHP sheet can be created from a document by a copying machine and the OHP sheet can be projected by one unit, and the time can be shortened.

According to the second aspect of the present invention, since the magnification changing means is used for changing the magnification of the image by the operating portion provided in the copying machine main body, the enlargement / reduction of the image can be easily performed by the operating portion of the copying machine main body. It can be operated easily.

According to the third aspect of the present invention, the flat lens is placed on the upper surface of the contact glass, the pressure plate is removed, and the projection optical system is attached to the pressure plate mounting metal fitting so that the OHP optical system or the like is provided in the main body of the copying machine. Since the OHP function is provided without providing a special mechanism, the size of the copying machine body can be made the same as that of an ordinary copying machine without hindering cost reduction or downsizing, thus saving space. Further, all the optical systems required for the OHP function except the exposure lamp which is shared with the copying function are not retrofitted, so that the function can be expanded and the function can be expanded.

According to the fourth aspect of the present invention, the first flat plate lens, the second flat plate lens, and the reflection plate are provided in the pressure plate, so that a special mechanism is not provided in the main body of the copying machine.
Since it has the P function, it can be made the same size as a normal copying machine without hindering cost reduction and downsizing of the copying machine body, and an optical system inside the pressure plate when not used as an OHP. Since it can be stored, it saves space. Further, except for the exposure lamp shared with the copying function, all the optical systems required for the OHP are provided in the pressure plate, so that the option can be expanded by replacing the pressure plate.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

2A and 2B show a pressure plate, FIG. 2A is a perspective view with a lid attached, and FIG. 2B is a perspective view with a lid removed.

FIG. 3 is a cross-sectional side view showing a projection optical system.

FIG. 4 is a perspective view showing a connection state of a projection optical system.

FIG. 5 is a control flowchart.

FIG. 6 is a continuation of the control flowchart shown in FIG.

FIG. 7 is an overall perspective view when used as a copying machine.

FIG. 8 is a perspective view showing a second embodiment of the present invention.

FIG. 9 is a perspective view showing a state in which a pressure plate is removed.

FIG. 10 is a side view of a pressure plate showing a third embodiment of the present invention.

FIG. 11 is a side view of the pressure plate showing a use state as an OHP.

FIG. 12 is an overall perspective view showing a usage state as an OHP.

FIG. 13 is an overall perspective view showing a usage state as a copying machine.

FIG. 14 is an explanatory diagram showing the basic principle of OHP.

FIG. 15 is a side view showing a general configuration of an OHP.

[Explanation of symbols]

 1 Pressure Plate 2 Flat Plate Lens 3 Projection Optical System 5 Copy Machine Main Body 6 Arm 7 Exposure Lamp 13 Operating Unit 14 Pressure Plate 15 Pressure Plate Mounting Bracket 16 Arm 17 Pressure Plate 19 Second Flat Lens 20 Reflector Plate

Claims (4)

[Claims] 1. A light-transmitting original placing table formed on the main body of the copying machine, and a pressure plate for pressing the original onto the original placing table.
An exposure lamp movably provided in the main body of the copying machine along the original mounting table, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, and a light of the exposure lamp attached to the pressure plate. And a projection optical system that magnifies and projects transmitted light from a document placed on the flat lens onto an external screen and is movably attached to the copying machine body by an arm. Copying device. 2. A translucent original placing table formed on the main body of the copying machine, and a pressure plate for pressing the original onto the original placing table.
An exposure lamp movably provided in the main body of the copying machine along the original mounting table, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, and a light of the exposure lamp attached to the pressure plate. A flat lens for diffusing light, a projection optical system that magnifies and projects transmitted light from a document placed on the flat lens onto an external screen, and is movably attached to the main body of the copying machine by an arm, and the main body of the copying machine. A copying machine, comprising: a magnification changing means for changing the magnification of an image by an operation unit provided. 3. A light-transmitting original placing table formed on the main body of the copying machine, a pressure plate detachably attached to the original placing table by a pressure plate mounting metal fitting of the copying machine main body, and An exposure lamp movably provided in the main body of the copying machine along the original placing table, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, and the exposure lamp placed on the original placing table. And a projection optical system that enlarges and projects the transmitted light from the original placed on the flat lens onto an external screen and is detachably attached by the pressure plate attachment bracket by the arm. Copying device characterized by. 4. A light-transmitting original placing table formed on the main body of the copying machine, and a pressure plate for pressing the original onto the original placing table.
An exposure lamp movably provided in the main body of the copying machine along the original mounting table, an exposure lamp fixing means for fixing the exposure lamp at an arbitrary position, and a light of the exposure lamp attached to the pressure plate. A first flat plate lens for diffusing light, a second flat plate lens which is attached to the pressure plate so as to be housed so as to be opposed to an external screen, and an original placed on the first flat plate lens. A projection optical system for reflecting the transmitted light and being arranged at a position to be guided to the second flat lens, and for projecting the transmitted light from the original document on the screen in an enlarged manner. Copying device.