JPH04286457A - Original reader and information processing unit provided with the same - Google Patents

Abstract

PURPOSE:To eliminate a read picture error by eliminating a suspended matter in a frame in the original reader where a transparent member into which a reflected light from an original is made incident is provided and a sensor having at least a photoelectric conversion element and which is supported integrally into the frame with enclosing. CONSTITUTION:An adhesive tape 8 as an in-frame suspended matter adsorption means is arranged to a region in a frame 1 other than an optical path in the original reader unit where a cover glass 7 into which a reflected light from an original is made incident and with a sensor array 4 provided with at least a photoelectric conversion element and which is supported integrally in the frame 1 through enclosing and even in the enclosed state after the end of assembly, in-frame suspended materials are adsorbed and eliminated to suppress occurrence of a picture error due to the suspended matter. Even a suspended matter invaded externally is adhered and eliminated by arranging the adhesive tape 8 to a gap which might be an invasion path of paper dust or the like when the paper dust or the like to be produced when an original 5 is carried by a roller 6 invades in the inside of the frame 1 through the gap between the frame 1 and the cover glass 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document reading device and an information processing device having the same, which can be used in facsimile machines, copying machines, scanners, and the like.

0002

[Prior Art] Conventionally, as a document reading device used in facsimile machines, copying machines, scanners, etc., there is a contact type image sensor that uses a sensor array to form a one-to-one image of the read image and read it in the same size as the read document. be.

This contact image sensor is composed of a sensor array, a short-focus imaging element array, a light source, a cover glass for holding a moving document, and other parts, and these parts are housed inside a frame. It is housed and incorporated as a document reading device unit.

0004

[Problems to be Solved by the Invention] However, in sensor arrays, short-focus imaging element arrays, and close-contact image sensors in which a light source is built into the frame, dust, dirt, and burr particles that remain inside the frame are difficult to solve. It is impossible to eliminate all floating objects, and we have no choice but to acknowledge their existence. When these floating objects exist in the imaging optical path, they obstruct the optical path and cause errors in the read image.

The presence of floating objects around the opening of the sensor array does not have a major effect on the read image, but if floating objects exist around the sensor opening of the sensor array, a reading error will naturally occur.

Furthermore, if there is a floating object in the frame on the surface of the cover glass on which the reflected light from the original is incident, a read image error will occur not only at the image forming point of the original reading section but also around the image forming point.

[0007] Such floating objects within the frame pose a problem in that, after each part has been assembled into the frame as a document reading device unit and is completed, it is difficult to disassemble it again and remove the floating object.

[0008]

[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention includes a sensor having a transparent member into which reflected light from an original is incident, and having at least a photoelectric conversion element. The present invention provides a document reading device that is integrally and hermetically supported within a frame, characterized in that an intraframe floating matter adsorption means is disposed in an area other than the optical path within the frame.

[0009] Furthermore, the floating matter adsorption means is characterized in that an adhesive tape or an adhesive member containing an adhesive adhesive is provided.

Furthermore, the present invention provides an information processing apparatus comprising the above-described document reading device and means for holding the document at the document reading position of the image sensor.

[0011]

[Operation] According to the present invention, by providing an adhesive member as a suction means for floating objects in the frame at a location other than the optical path in the frame, dust, dust, burrs, etc. can be removed even in a sealed original reading device unit. Floating objects inside the frame can be removed by fixing them with adhesive. This makes it possible to improve read image errors due to the influence of floating objects.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional structural diagram of a document reading device showing an embodiment of the present invention.

In FIG. 1, a document 5 is guided by rollers 6 and conveyed to a document reading position. At this time, the light emitted from the light source 3 passes through the cover glass 7,
The reflected light that irradiates the original 5 and is reflected by the original 5 passes through the cover glass 7 again and is focused by the short focus imaging element array 2, and the focused light is imaged by the sensor array 4. It is photoelectrically converted and an image signal can be obtained.

[0014] In the document reading device having such a configuration,
In this embodiment, foreign matter floating inside the frame 1 is
Adhesive tape 8 was placed as a means for adsorbing floating matter within the frame for removal.

The adhesive tape 8 has the effect of absorbing and fixing floating objects present in the space inside the frame 1.

The adhesive tape 8 also prevents dust such as paper dust generated when the original 5 is fed by the roller 6 from entering the frame 1 through the gap between the frame 1 and the cover glass 7. By placing it in a gap that is likely to be an entry route for paper powder, etc., it is possible to adhesively fix floating objects that enter from the outside.

[0017] As the adhesive tape 8, a double-sided tape can be used to fix floating objects by utilizing the adhesive property of one side.

The same effect can also be obtained by printing and applying an adhesive with similar adhesive strength to the back surface of the cover glass 7 instead of using the adhesive tape 8, and the accuracy of the application position can be further improved. By doing so, the coating area can be placed in the maximum area that does not obstruct the imaging optical path.

Further, the means for adsorbing objects floating within the frame is not limited to the above-mentioned adhesive tape or adhesive having adhesive properties, but may be any material having adhesive properties.

Next, FIG. 2 is a schematic configuration diagram showing an example of a facsimile having a communication function as an image information processing apparatus constructed using a sensor unit 100 having a document reading device according to this embodiment.

Here, 102 is a feeding roller serving as a feeding means for feeding the original 11 toward the reading position, and 104 is a separation piece for reliably separating and feeding the original 11 one by one. . A platen roller 106 is provided at a reading position with respect to the sensor unit to regulate the surface of the original 11 to be read and serves as a conveying means for conveying the original 11.

In the illustrated example, P is a recording medium in the form of a roll paper, on which image information read by the sensor unit 100 or image information transmitted from the outside in the case of a facsimile device or the like is reproduced. 110
is a recording head as a recording means for forming the image, and various types such as a thermal head and an inkjet recording head can be used. Further, this recording head may be of a serial type or a line type. Reference numeral 112 denotes a platen roller serving as a conveyance means for conveying the recording medium P to the recording position by the recording head 110 and regulating the recording surface thereof.

Reference numeral 120 denotes an operation panel on which are arranged switches for accepting operation inputs as input/output means, messages, and a display section for notifying the status of the apparatus.

Reference numeral 130 denotes a system control board as a control means, which includes a control unit (controller) for controlling various parts, a drive circuit (driver) for the photoelectric conversion element, an image information processing unit (processor), a transmitting/receiving unit, etc. provided. 140 is a power source for the device.

As the recording means used in the information processing apparatus of the present invention, those whose typical configurations and principles are disclosed, for example, in US Pat. No. 4,723,129 and US Pat. No. 4,740,796 are preferable. In this method, at least one electrothermal transducer that corresponds to the recorded information and that causes a rapid temperature rise exceeding nucleate boiling is applied to an electrothermal transducer placed corresponding to the sheet holding the liquid (ink) or the liquid path. By applying a drive signal, the electrothermal transducer generates thermal energy, causing film boiling on the heat-active surface of the recording head, resulting in bubbles in the liquid (ink) corresponding one-to-one to this drive signal. It is effective because it can form . Due to the growth and contraction of these bubbles, liquid (
ink) to form at least one droplet.

Furthermore, a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus can be produced by combining a plurality of recording heads as disclosed in the above-mentioned specification. Either a configuration that satisfies the length or a configuration as a single recording head formed integrally may be used.

In addition, a replaceable chip-type recording head that is attached to the apparatus main body enables electrical connection with the apparatus main body and ink supply from the apparatus main body, or an ink-type recording head that is attached to the print head itself. The present invention is also effective when using a cartridge type recording head in which a tank is integrally provided.

[0028]

Effects of the Invention As explained above, the present invention provides a means for adsorbing floating objects within the frame of a document reading device.
By installing an adhesive material such as adhesive tape or adhesive, floating objects inside the frame can be removed by suction even after the document reading unit is completed, without having to disassemble and open the inside. be able to.

[0029] This provides the effect of eliminating read image errors.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a document reading device embodying the present invention.

FIG. 2 is a diagram showing a cross-sectional structure of a facsimile device as an information processing device having the document reading device of the present invention.

[Explanation of symbols]

1 Frame 2 Short focus imaging element array 3 Light source 4 Sensor array 5 Manuscript 6 Roller 7 Cover glass 8 Adhesive member (adhesive tape)

Claims (5)

[Claims] Claims: 1. A document reading device that includes a transparent member through which reflected light from a document is incident, includes at least a sensor equipped with a photoelectric conversion element, and is integrally and hermetically supported within a frame. A document reading device characterized in that an in-frame floating object suction means is arranged in an area other than an optical path. 2. The document reading device according to claim 1, wherein an adhesive member is provided as the floating matter adsorption means. 3. The document reading device according to claim 2, wherein the adhesive member is an adhesive tape. 4. The document reading device according to claim 2, wherein the adhesive member is an adhesive having adhesive properties. 5. An information processing device comprising: the document reading device according to claim 1; and means for holding a document at a document reading position of the document reading device.