JPS6126368A - Image information reader - Google Patents

Abstract

PURPOSE:To make an image information reader thinner, by arranging a printed board forming a circuit which processes signals from an image pickup section beside the image pickup section in parallel with the scanning direction. CONSTITUTION:An original reading section 15 which reads image information by scanning an original (a) placed on an original placing table 13 is provided in the main body 11 of an image information reader. The reading section is equipped with a light source 16, light-converging fiber lens 17, and photoelectrically converting section 18 and they are supported by a carriage 19. A holder 30, in which printed circuit boards 29 are arranged in parallel with the scanning direction, is provided beside the carriage 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image information reading device used in, for example, an image forming device.

(Technical background of the invention and its problems) In the image information reading device of the above type, as shown in FIG. 3 and guides the reflected light to the photoelectric conversion section 5 through the light-converging fiber lenses 4, 4. There are devices that scan a document and read its image information.

By the way, this device includes an amplifier circuit that amplifies the signal converted by the photoelectric conversion unit 5, and an A/D conversion circuit that converts the signal amplified by this amplifier circuit from A to D.
PC board with tc, ta 53 mm, width 274 mm (
Since three printed circuit boards (printed circuit boards) 7 were arranged next to the reading section 6 at right angles to the scanning direction, that is, vertically, the main body 1
was relatively thick.

Therefore, when trying to make the device thinner with this arrangement,
It is conceivable to reduce the gap between the holder 8 of the PCC 10 . . . and the document table 2 and the gap between the holder 8 and the base plate 9 of the PCC 10 . . . or to reduce the size of the PCC 10 .

However, in the former case, conventionally, P, C plates 7...
Since the gap between the holder 8 and the original platen 2 of the PCC 10 is about 3 ml1, and the gap between the holder 8 of the PCC 10 and the base plate 9 is about 2 mm, the fan 10 is installed on the rear side of the main body 1. However, when outside air is sucked in from the front side of the main body 1 and blown to the rear side, there is a problem in that the air blowing is obstructed and poor cooling occurs.

On the other hand, in the latter case, the gap becomes larger, but PCC1
There is a problem in that the number of 0... increases and the device becomes larger.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and an object thereof is to provide an image information reading device that can be made thinner without causing poor cooling or increasing the size of the device. be.

[Summary of the invention]

In order to achieve the above object, the present invention provides an image information reading device that reads information on a document by scanning the document with an image pickup section that takes an image of the document, which processes signals from the image pickup section. By arranging the printed circuit board on which the circuit is formed next to the imaging section in parallel to the scanning direction, the device can be made thinner, and moreover, when air is blown along the scanning direction, it is possible to perform good air blowing. It is characterized by:

[Embodiments of the invention]

Hereinafter, a single eggplant example of the present invention will be explained with reference to FIGS. 1 to 3. Reference numeral 11 in FIG. 2 is a main body of the image information reading device, and an operating section 12 is provided at the front of the upper surface of the main body 11. As shown in FIG. Further, on the upper surface of the main body 11, there is provided a document placing table 13 on which the document a is placed, and on this document placing table 13, a document presser 14 is provided so as to be openable and closable.

As shown in FIGS. 1 and 3, the main body 11 is provided with a document reading section (imaging section) 15 that scans the document a placed on the document table 13 and reads its image information. ing. The document reading section 15 includes a pair of fluorescent lamps (light sources) 16.1 that illuminate the document a placed on the document mounting table 13.
6 and the original a illuminated by these fluorescent lights 16.16
A pair of light-converging fiber lenses 17.17 are arranged on the optical path of the light reflected from the light-converging fibers at substantially right angles (that is, vertically) to the original scanning direction (back-and-forth direction) and in an inverted V-shape. The photoelectric conversion unit 18 receives light that has passed through lenses 17 and 17 and performs photoelectric conversion, and is supported by a carriage 19.

Further, this carriage 19 is reciprocated by a moving mechanism 20. That is, 21 and 22 are guide shafts and rails arranged parallel to each other along the front-rear direction, and the negative side of the carriage 19 is attached to the guide shaft 21 via the slider 23, and the other side is attached to the row 24. By being supported on the rail 22 via the guide shaft 21, the guide shaft 21 is slidably installed between the guide shaft 21 and the rail 22. The carriage 19 is reciprocated in the front-rear direction via a timing belt 26 by the driving force of a motor 25 provided at the rear of the main body 11. In addition,
Power to the fluorescent lamp 16.16 is supplied from an inverter 27 provided at the rear of the main body 11 through the flat cable 1 and pull 28, and image information is supplied to the photoelectric conversion section through a light-focusing fiber lens 17.17. After being converted into an analog signal at step 18, it is amplified by an amplifier circuit formed on a PC board (printed circuit board) 29 and 29, which will be described later.
It is converted into a digital signal by the D conversion section and sent to the flat cable 28.
is sent to the recording device via.

Further, a holder 30 is attached to the side of the carriage 19, that is, on the rear side, and the holder 30 has a vertical 92
Two PC boards 29 with a width of 274 mm and a width of 274 mm are arranged parallel to the scanning direction. Here, this 'PCPC board, 2'
The area of PC board 9 of the conventional device (Fig. 4) is 53 (mm,) x 274 (mm') x 3 (sheets) = 436 (a + f), while it is 92 (mm). )
X274 (mn+) x2 (sheets) = 504 (ctd
), ensuring a space equal to or greater than that of conventional models. Further, the amount of movement of one carriage is the same as that of the conventional one, so when the carriage 19 is located on the rear side of the main body 11, the PC board 29.29 is connected to the inverter 27.
It is located below the .

Further, for example, two propeller fans 31 and 31 are provided on the rear side of the Y-arranged main body 11, and these are configured to blow air along the scanning direction, that is, from the front side to the rear side of the main body 11. It has become.

In addition, in FIG. 3, 32 is a base plate, and 33 is a PC board on which a timing circuit is formed.

According to the above configuration, since the PC boards 29, 29 are arranged parallel to the scanning direction, that is, horizontally, the device can be made thinner without increasing the number of PC boards 29, 29, that is, without increasing the size of the device. can be achieved. Moreover, the holder 30
Since the gap between the holder 30 and the document table 13 and the gap between the holder 30 and the base plate 32 can be increased, the fans 31 and 31 can sufficiently blow air from the front side to the rear side, effectively reducing the temperature rise inside the apparatus. It can be suppressed.

In particular, not only is heat dissipated sufficiently from the fluorescent lamps 16 and 16, which are the largest sources of heat generation, but also heat generated by the COD that makes up the photoelectric conversion section 18 and the A/D converter IC that makes up the A/D conversion section is sufficiently dissipated. Since the heat can be released, malfunctions due to heat will no longer occur.

In addition, although two propeller fans were used in the above embodiment, the present invention is not limited to this, and for example, one lysiflow fan may be used.

〔Effect of the invention〕

As described above, according to the present invention, in an image information reading device that reads information on a document by scanning the document with an image pickup section that takes an image of the document, a circuit that processes signals from the image pickup section. Since the printed circuit board 1 to the circuit board on which the images are formed are arranged parallel to the scanning direction next to the imaging section, it is possible to reduce the thickness of the device without increasing the size of the device. An apparatus configured to cool the imaging unit and the printed circuit board by cooling the image pickup unit and the printed circuit board has excellent effects such as no cooling failure.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention.
The figure is a perspective view showing the internal structure, Figure 2 is an external perspective view, and Figure 3 is a perspective view showing the internal structure.
The figure is a schematic sectional view, and FIG. 4 is a schematic sectional view showing a conventional example. 11...Main body, 15...Imaging section (reading section), 16.
...Light source (fluorescent lamp), 17...Light-focusing fiber lens, 18...Photoelectric conversion section, 19...Carriage,
20...Movement mechanism, 29...Printed circuit board (P
C board), 31...Fan.

Claims (5)

[Claims] (1) In an apparatus in which information on the original is read by scanning the original with an imaging section that takes an image of the original, a printed circuit board on which a circuit for processing signals from the imaging section is formed is attached to the imaging section. An image information reading device characterized in that it is arranged laterally parallel to a scanning direction. (2) The imaging unit includes a light source that illuminates the document, a light-focusing fiber lens placed on the optical path of the light emitted from the document, and receiving the light that has passed through the light-focusing fiber lens for photoelectric conversion. The structure includes a photoelectric conversion unit that converts the signals, and a carriage that supports them, the printed circuit board is supported by the carriage, and a circuit that processes signals from the image pickup unit converts the signals converted by the photoelectric conversion unit. 2. The image information reading device according to claim 1, comprising an amplifier circuit that amplifies a signal, and an A/D conversion circuit that converts the signal amplified by the amplifier circuit from analog to digital. (3) An imaging section that captures an image of a document, a moving means that moves the imaging section to scan the document with the imaging section and read information on the document, and a circuit that processes signals from the imaging section. The apparatus includes a printed circuit board, a fan that blows air along the scanning direction to cool the printed circuit board, and a main body that houses these, and the printed circuit board is disposed next to the imaging section and parallel to the scanning direction. Features of image information reading device. (4) The imaging unit includes a light source that illuminates the document, a light-focusing fiber lens placed on the optical path of the light emitted from the document, and receiving the light that has passed through the light-focusing fiber lens and photoelectrically converting the light that has passed through the light-focusing fiber lens. The structure includes a photoelectric conversion unit that converts the signals, and a carriage that supports them, the printed circuit board is supported by the carriage, and a circuit that processes signals from the image pickup unit converts the signals converted by the photoelectric conversion unit. 4. The image information reading device according to claim 3, comprising an amplifier circuit that amplifies a signal, and an A/D conversion circuit that converts the signal amplified by the amplifier circuit into an A/D converter. (5) The image information reading device according to claim 3, wherein the fan is configured to blow air from the front side to the rear side of the main body.