JPH092700A - Image sensor device - Google Patents

Abstract

PURPOSE: To provide an image sensor device wherein staining a document read part due to ink and dust is prevented. CONSTITUTION: In an image sensor device of structure mounting a flat transparent glass 2 in an information read surface 1, mounting an information read means 3 in the inside and reading information described in paper P inserted from the outside by the information read means 3, forming a part of the read surface 1 into a uniform protruded structure 4 having a prescribed width and providing a recessed groove 5 in parallel with the protruded structure 4 in a document inserting side of the read surface 1, are adopted as constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image sensor device, and more particularly to a contact type image sensor device for reading a document by bringing the document into close contact with the reading surface.

[0002]

2. Description of the Related Art In this type of image sensor device, when a large number of originals are read, ink is attached to the originals when the originals are read, and the originals become dirty and the reading performance deteriorates with use. It has been pointed out that black stripes, black stripes, and other lines that do not exist are erroneously read.

Therefore, a technique for improving this inconvenience is disclosed in, for example, Japanese Patent Laid-Open No. 62-262563. The one disclosed in this publication has an image sensor main body, a transparent protective layer laminated on an original reading section of the image sensor main body, and a document is conveyed along the transparent protective layer which is disposed so as to face the transparent protective layer. It is equipped with a roller. Further, the transparent protective layer is provided with a groove portion at a contact position with the roller in parallel with the rotation axis of the roller. Typically,
The transparent protective layer as the document reading surface is made of flat glass to smooth the movement of the document. Further, the groove portion here is a fine one having a depth of about 10 [μm].

When reading the original, the original is conveyed while being pressed against the groove by the roller. At this time, since the roller and the grooved peripheral portion come into contact with each other, the document is not directly pressed against the bottom of the groove portion which is the reading unit, which improves the inconvenience that the ink of the document adheres to the reading unit. There is.

[0005]

However, in the above-mentioned conventional example, there is a disadvantage that the bottom of the groove, which is the reading unit, accumulates dust, which also deteriorates the document reading performance. Further, since the original is sandwiched between the roller and the corner of the groove when the original is conveyed, there is also a disadvantage that the ink scraped at the corner of the groove accumulates in the groove and the original reading performance is further deteriorated.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an image sensor device which improves the inconvenience of the above-mentioned conventional example, and in particular prevents the document reading portion from being contaminated by ink or dust.

[0007]

According to a first aspect of the present invention, the information reading surface is provided with a flat transparent glass, the information reading means is provided inside, and the information written on a sheet inserted from the outside is recorded as information. In an image sensor device having a structure for reading by a reading means, the reading surface portion has a uniform convex structure having a predetermined width, and a concave groove is provided parallel to the convex structure on the original insertion side of the reading surface. Is taking.

According to the second aspect of the invention, the information reading surface is equipped with a flat transparent glass, the information reading means is installed inside, and the information reading means reads the information written on the sheet inserted from the outside. In the image sensor device, the reading surface portion has a uniform convex structure having a predetermined width, and a groove is provided parallel to the convex structure on the original insertion side of the reading surface. Further, a configuration is adopted in which a document conveying roller is provided on the convex structure portion of the reading surface.

According to a third aspect of the present invention, the uniform convex structure of the reading surface portion is composed of flat transparent glass and micro glass attached to the transparent glass.

According to a fourth aspect of the present invention, the convex structure of the reading surface portion and the concave groove parallel to the convex structure are made of flat transparent glass and micro glass of a predetermined width.

Accordingly, the above-mentioned object is to be achieved.

[0012]

According to the first aspect of the present invention, when the original is conveyed on the information reading surface, first, the ink surface of the original comes into contact with the concave groove, and at this time, the corner of the concave groove and the ink surface are separated from each other. Excessive ink contact (toner powder that could not be fixed)
A part of is cut off inside the groove. Next, when the original is further conveyed and the ink surface reaches the convex structure of the information reading surface, the corner of the convex structure comes into contact with the ink surface, and the ink is further scraped off. The ink scraped off by the convex structure collects at the foot of the convex structure.

According to the second aspect of the invention, when the document is conveyed on the information reading surface by the action of the document conveying roller, first, the ink surface of the document approaches the concave groove, and at this time, the concave groove is cut. The sharp corners come into contact with the ink surface, and a part of the excess ink (toner powder that has not been fixed) is scraped off inside the concave groove. Next, the document transport roller is further rotated to transport the document, and when the ink surface approaches the convex structure of the information reading surface and the document transport roller, the corner of the convex structure comes into contact with the ink surface, and The ink is wiped off. At this time, the ink scraped off by the convex structure gathers at the foot of the convex structure. In addition, it cannot be removed by these,
The ink remaining on the convex structure after the document has passed (after the document reading operation is completed) is wiped off by the idle rotation of the document transport roller. At this time, since the convex structure is formed in pressure contact with the original conveying roller, the pressing force of the original conveying roller is concentrated on the convex structure portion.

According to the third aspect of the invention, the convex structure is formed by mounting the micro glass having a predetermined width on the flat transparent glass.

According to the fourth aspect of the present invention, the convex structure and the concave groove parallel to the convex structure are formed by mounting the micro glass having a predetermined width on the flat transparent glass.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

The image sensor device shown in FIG. 1 is provided with a flat transparent glass 2 on the information reading surface 1 and an information reading means 3 inside the device. The information reading unit 3 reads the information written on the sheet (original) P inserted from the outside.
Among them, a uniform convex structure 4 having a predetermined width is formed on the information reading surface 1 portion. A concave groove 5 is formed in parallel with the convex structure 4 on the document insertion side of the information reading surface 1 (right side in FIG. 1).
Is provided. Further, in this embodiment, a document conveying roller 6 is provided on the convex structure 4 portion of the information reading surface 1.

More specifically, in this embodiment, the information reading surface 1 constitutes the upper surface of the housing 10. The information reading means 3 provided in the housing 10 includes an LED light source 3A for irradiating light for reading a document, a lens array 3B for receiving reflected light from the document, and a light passing through the lens array. And a light receiving element 3C for receiving light. The light-receiving element 3C is mounted on the circuit board 7 that converts the input light to the light-receiving element 3C into a predetermined electric signal, and is mounted on the housing 10.
Equipped on the bottom of the. Here, the housing 10 has an area of a vertical section of about 200 [mm ² ] and its width (depth direction in FIG. 1) is set according to the width of the paper used for reading.

The uniform convex structure 4 on the information reading surface 1 and the concave groove 5 parallel thereto are flat transparent glass 2 and a plurality of micro-glasses M, M mounted on the transparent glass 2 and having a predetermined width. , M and. That is, the transparent glass 2 and the plurality of micro glasses M, M, M are laminated to form a convex structure and a concave groove. The height of the convex structure and the depth of the concave groove are each set to about 10 [μm]. The width of the convex structure portion and the concave groove is 5
It is 0 [μm] to 100 [μm] or more. Here, the convex structure and the concave groove may be formed by cutting a single transparent glass, instead of this.

The original conveying roller 6 is pressed against the convex structure 4 portion. The surface of the document feeding roller 6 is made of a felt material which is relatively hard.

Next, the overall operation of this embodiment will be described with reference to FIG.

When the original P is inserted from the direction of arrow A and the original P is conveyed on the information reading surface 1 by the operation of the original conveying roller 6, first, the ink surface I of the original P approaches the concave groove 5, At this time, the corner K that cuts the groove 5 comes into contact with the ink surface I, and a part of the excess ink (toner powder that has not been fixed) is scraped off inside the groove 5. next,
When the original conveying roller 6 further rotates and the original P is conveyed, and the ink surface I approaches the convex structure 4 of the information reading surface 1 and the original conveying roller 6, the corner T of the convex structure 4 and the ink surface. I comes into contact, and further the ink is scraped off. At this time, the ink scraped off by the convex structure 4 is
Gather at the foot of the.

The ink that cannot be removed by these means and remains on the convex structure 4 after the document P has passed (after the document reading operation is completed) is caused by the document transport roller 6 rotating idly thereafter. Wiped off. At this time, since the convex structure 4 is formed in pressure contact with the document conveying roller 6,
The pressing force of the document conveying roller 6 is intensively applied to the convex structure 4 portion.

As described above, according to this embodiment, since the concave groove is formed immediately before the reading position in the original insertion direction, when ink or the like is excessively attached to the original, the ink comes into contact with the corner of the concave groove. By doing so, it is possible to scrape off the excess ink or the like, and it is possible to suppress the occurrence of a situation in which the excess ink or the like adheres to the reading position (the top surface of the convex structure) and stains to cause poor reading. Further, since the convex structure is provided at the reading position, excess ink can be scraped off even at the corners of the convex structure, and the stain on the reading portion can be suppressed more effectively.

Further, since the document conveying rollers are arranged corresponding to the convex structure portions, the pressure contact force of the document conveying rollers can more effectively scrape off the ink in the convex structure portions, and at the same time, the original document can be removed. Even if ink or dust adheres to the reading position after reading, the ink or dust at the reading position can be removed by idle rotation of the document conveying roller.

Further, since the convex structure and the concave groove can be formed by mounting the micro glass on the transparent glass, there is an advantage that the convex structure and the concave groove can be easily formed as compared with the case of cutting the glass.

In addition to this, since the surface of the document conveying roller is made of a relatively hard felt material, the cleaning effect at the reading position is high, and the inconvenience that the reading position is scratched is improved.

Here, regardless of the present embodiment, a plurality of concave grooves may be provided in parallel with the convex structure. Except for the reading position, a sheet material having a large friction coefficient such as a felt material may be attached to the information reading surface. Information reading means 3 inside the housing 10
As shown in FIG. 3, a reduction optical system including a light source 13A provided on the bottom surface side of the housing 10, a lens array 13B including a mirror 14 and a lens 15, and a light receiving element 13C is adopted. May be

[0029]

Since the present invention is constructed and functions as described above, according to the present invention, since the concave groove is formed immediately before the reading position in the document insertion direction, when ink or the like is excessively attached to the document, When this ink comes into contact with the corners of the concave groove, the excess ink or the like can be scraped off, and the excess ink or the like adheres to the reading position (the top surface of the convex structure), resulting in poor readability. Occurrence can be suppressed. Further, since the convex structure is provided at the reading position, excess ink can be scraped off even at the corners of the convex structure,
It is possible to provide an unprecedented excellent image sensor device capable of more effectively suppressing dirt on the reading portion.

According to the second aspect of the invention, since the document conveying roller is arranged corresponding to the convex structure portion, in addition to the above effect, the pressure contact force of the document conveying roller causes the ink in the convex structure portion The trimming can be performed more effectively, and even if ink or dust adheres to the reading position after the document is read, the idle rotation of the document feeding roller can remove the ink or dust at the reading position.

Further, in the invention according to claim 3 or 4,
Since the convex structure and the concave groove can be formed by mounting the micro glass on the transparent glass, there is an advantage that the convex structure and the concave groove can be easily formed as compared with the case of cutting the glass.

[Brief description of drawings]

FIG. 1 is a partially omitted schematic vertical sectional view showing the configuration of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of information reading means in the embodiment shown in FIG.

FIG. 3 is an explanatory diagram illustrating an overall operation of the embodiment illustrated in FIG.

[Explanation of symbols]

 1 Information Reading Surface 2 Transparent Glass 3 Information Reading Means 4 Convex Structure 5 Recessed Groove 6 Document Conveying Roller M Micro Glass P Paper (Original)

Claims (4)

[Claims] 1. An image sensor device having a structure in which a flat transparent glass is provided on an information reading surface, information reading means is provided inside, and information written on a sheet inserted from the outside is read by the information reading means, An image sensor device, wherein the reading surface portion has a uniform convex structure having a predetermined width, and a groove is provided on the reading surface side of the document insertion side in parallel to the convex structure. 2. An image sensor device having a structure in which a flat transparent glass is provided on an information reading surface, information reading means is provided inside, and information written on a sheet inserted from the outside is read by the information reading means, The reading surface portion has a uniform convex structure having a predetermined width, and a groove is provided on the reading surface in the original insertion side in parallel with the convex structure. An image sensor device comprising a roller. 3. The image sensor according to claim 1, wherein the uniform convex structure of the reading surface portion is composed of flat transparent glass and micro glass mounted on the transparent glass. apparatus. 4. The image sensor device according to claim 1, wherein the convex structure of the reading surface portion and the concave groove parallel to the convex structure are made of flat transparent glass and micro glass of a predetermined width. .