JPS6367963A - Image reader - Google Patents

Abstract

PURPOSE:To improve the operability of a device by constituting a reflecting mirror for folding light projected from a projector and forming its image on an original platen glass and a Fresnel lens as one unit and fitting the unit to a device body so that the unit can be optionally stood/laid by a hinge. CONSTITUTION:In case of reading out projected image information, the enlarged projection image of a slide film is projected from the projector 6 formed on the upper surface of a device body A and formed on an original platen glass 1 through the reflecting mirror 4 and an image information reading unit 2 is scanned to read out the projected image information. In case of reading out the image information of a reflected original, a case 7 is laid to the upper part of the Fresnel lens 5, the Fresnel lens 5 is stored in the case 7 and the case 7 is rotated in the counterclockwise direction around the standing/laying shaft 10 of the hinge 9. Under said status, an original 0 is set up on the original platen glass 1 so that its original surface is turned downward, a platen cover 3 is laid on the original, and reflected light from the original surface is successively scanned and read out by an image information reading unit 2.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the Invention [Field of Industrial Application] The present invention relates to an image reading device such as a copying machine e-Image League facsimile.

More specifically, the present invention relates to an image reading device capable of reading image information of a reflective original placed on a glass platen and projected image information of a slide film or the like projected and imaged by a projector onto the glass platen.

[Conventional technology]

Figures 5 and 6 show the schematic configuration of an example of a conventional image reading device of this type. Figure 5 is for reading image information of a reflective original, and Figure 6 is for reading projected image information. shows.

1 is a document table glass fixed to the main body A of the apparatus, and 2 is a movable image information reading unit disposed on the lower side of the document table glass. The unit 2 includes a document illumination lamp 21, a short-focus imaging element array 22 (product name: 5elfoc), a solid-state image sensor array 23 (contact type line sensor), etc. The unit 2 is guided by a guide rail by a drive mechanism (not shown) and displays the document. It is moved forward at a predetermined speed from a home position on the left side of the glass to the right side along the lower surface of the base glass 1, and when it reaches the end point of forward movement, it is returned to the home position again.

When reading the image information of a reflective original, place the original 0 in a predetermined position on the original platen glass l7 with the image side facing down, as shown in Figure fjIJ5, and place the original 0 on top of the main body A of the apparatus. Cover with the document holding plate 3 that is attached. The original holding plate 3 is required not only to fix the original but also to recognize the original size.

And the illumination lamp 21 of the image information reading unit 2
is turned on and unit 2 is moved forward. As a result, the downward facing image surface of the document O on the document table glass l is sequentially illuminated and scanned from the left side to the right side, and the one-dimensional array 23 of the solid-state image sensor outputs the read image information as a time-series photoelectric conversion pixel signal. be done.

In the case of a copying machine, the output signal is sent to a laser beam printer built into the image reading device or provided separately and printed, and in the case of an image league, it is sent to a display device or a storage device. In the case of facsimile, the information is sent to the receiving device by wire or wirelessly.

On the other hand, when reading an enlarged projected image of a slide film, etc., the original holding plate 3 is raised upward and retracted from the original platen glass l, and a reflection is placed above the original platen glass as shown in FIG. A mirror 4 and a Fresnel lens 5 are arranged, and an enlarged projected image of the slide film is formed on the document table glass 1 via the reflecting mirror 4 from a slide projection device 6 provided on the side of the mirror 4 and the Fresnel lens 5 at the upper part of the apparatus main body A. . Then, with the document illumination lamp 21 turned off, the image information reading unit 2
The above projection image information is read by scanning in the same manner as above.

Note that when a SELFOC lens array is used as the imaging element array 22 as described above, it is necessary to convert the projection light into a parallel light beam, and the Fresnel lens 5 imparts directivity to the light beam that spreads in the projection direction. It is used to hold up.

FIG. 7 shows the state of the light flux in the system excluding the reflection mirror 4. 61 is an exit pupil of a projection lens within the projection device 6.

[Problem that the invention seeks to solve]

However, when the above-mentioned image information of the reflective original and projected image information of a slide film, etc. are to be read alternately and repeatedly, the reflective mirror 4 and Fresnel lens 5 must be attached and detached each time, which makes the operation very cumbersome. In particular, when arranging the reflecting mirror 4 and Fresnel lens 5 at predetermined positions on the document platen glass 1, there is a problem that it takes time to align them.

The present invention aims to solve the above problems with a simple configuration.

SUMMARY OF THE INVENTION [Means for solving the problems] The present invention provides an image reading device capable of reading image information of a normal reflective original and projected image information of a slide film, etc. A reflecting mirror and a Fresnel lens for folding back the projected light and forming an image on the document table glass are configured as one unit, and the unit is mounted on the main body of the apparatus so as to be tiltable with a hinge. do.

[For production]

When reading image information of a normal reflective original, a unit including a reflective mirror and a Fresnel lens can be raised above the main body of the apparatus and retracted from the original table glass. Furthermore, when reading projected image information from a slide film or the like, the reflecting mirror and Fresnel lens can be returned to predetermined positions on the document table glass by tilting the unit above the main body of the apparatus.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 1 is a schematic configuration explanatory diagram of the image reading device of the present invention, and FIG.
The figure is an enlarged front view of the main part when reading the image information of a reflective original, Figure 3 is the same view when reading the projected image information, and Figure 4 is the same as above when reading the projected image information.
The figure is a partially enlarged sectional view.

In FIG. 4, reference numeral 7 denotes a unit case for accommodating the reflecting mirror 4 and Fresnel lens 5 as one unit.The case 7 is formed in a substantially box shape with an open bottom surface, and the reflecting mirror 4 is mounted on the inner surface of the case 7. installed. The case 7 is attached to one end of the Fresnel lens 5 so as to be openable and closable with a shaft 8, and by placing the case 7 over the Fresnel lens 5 as shown by the chain line in FIG.
and Fresnel lens 5 are housed in case 7.

Reference numeral 9 denotes a hinge for attaching the reflecting mirror 4 and the Fresnel lens 5 to the upper surface of the main body A of the apparatus so as to be able to freely raise and lower the tilting axis lO.
and a pair of hinge plays) 11 and 12. One of the hinge plates 11 is attached to the top surface of the device main body A by screws 1.
3, etc., and the unit case 7e Fresnel lens 5 is rotatably attached to the free end of the other hinge plate 12 via the shaft 8. Reference numeral 14 denotes a spring for constantly biasing the unit case 7 to rotate in the counterclockwise direction in the figure around the shaft 8. One end 14a is hooked on the hinge plate 12, and the other end 14b is pressed against the inner surface of the case 7. It is the composition. 15 is a stopper that restricts the rotation of the case 7.

When reading the projected image information, as shown in FIGS. 3 and 4, fold down the hinge plate 12 onto the top surface of the device main body A,
The Fresnel lens 5 is placed on the document table glass l. Then, the case 7 is rotated counterclockwise in the figure around the shaft 8 by the spring 14, and the reflection mirror 4 attached to the inner surface of the case 7 comes into contact with the stopper 15 to a predetermined inclination angle as shown in FIG. is maintained.

In this state, as shown in FIG. The projected image information is read by scanning the image information reading unit 2 with the light off.

On the other hand, when reading the image information of the reflective original, from the state shown in FIG. 3 and FIG. The Fresnel lens 5 and the reflecting mirror 4 are placed on top of each other and housed in the case 7. And the tilting axis lO of the hinge 9
When rotated counterclockwise around , one hinge plate 1.2 comes into contact with a stopper 16 provided on the top surface of the other hinge plate 11, as shown by the chain lines in FIGS. 2 and 4, and the reflecting mirror 4. The center of gravity of the Fresnel lens 5 and the case 7 is located on the left side of the above-mentioned tilting axis 10, and the case 7 that houses the reflection mirror 4 and the Fresnel lens 5 is moved from the document table glass l as shown in FIG. It is kept in a evacuated state.

In this state, the original 0 is placed on the original platen glass l with the original surface facing downward, and the original holding plate 3 is placed over it, and the image information reading unit 2 sequentially reads and scans the reflected light from the original surface. It is. The document holding plate 3 described above is, for example, a second
In the figure, the case 7, which houses the reflection mirror 4 and Fresnel lens 5, is retracted from the document table glass 1 as shown in Figure 2. It is in a good position and does not interfere.

C. Effects of the Invention As described above, the present invention provides a reflection mirror 4 for returning the projection light from the projection device 6 and forming an image on the document table glass l.
and Fresnel lens 5 as t units,
Since the unit is attached to the main body A of the apparatus so that it can be raised and lowered freely by a hinge 9, when reading the image information of a reflective original, the above unit can be raised and easily evacuated from the original platen glass l, and the projection When reading image information, the apparatus main body 4 and Fresnel lens 5 can be returned to predetermined positions easily and accurately by tilting the unit onto the document table glass.

Also, when reading reflective originals and projection originals repeatedly,
Switching can be done easily by simply raising and lowering the unit, resulting in extremely good operability.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration explanatory diagram of the image reading device of the present invention, and FIG.
The figure is an enlarged front view of the main part when reading the image information of a reflective original, Figure 3 is the same view when reading the projected image information, and Figure 4 is the same as above when reading the projected image information.
The figure is an enlarged cross-sectional view of a part of it, Figures 5 and 6 are longitudinal sectional front views of the main parts of a conventional image reading device, and Figure 7 is an explanation showing the state of the light flux in the system excluding the reflecting mirror. It is a diagram. A is the device main body, l is the document table glass, 4 is the reflection mirror, 5
is a Fresnel lens, 6 is a projection device, 7 is a unit case, and 9 is a hinge.

Claims (1)

[Claims] (1) In an image reading device that can read the image information of a normal reflective original and the projected image information of a slide film, etc., the projection light from the projection device is folded back to form an image on the document platen glass. 1. An image reading device comprising a reflecting mirror and a Fresnel lens as one unit, and the unit is mounted on a main body of the device so as to be tiltable up and down with a hinge.