JPH04120865A - Contact type image sensor and information processor using the same - Google Patents

Abstract

PURPOSE:To stably hold a transparent protecting plate by flatly pressing and holding a gradient-shaped bottom part at the end part of the transparent protecting plate by a holding plate having the similar gradient shape. CONSTITUTION:This image sensor is composed of cover glass 1 as the transparent protecting plate, holding plate 2, enclosure 3, sensor module 4, LED array light source 5, lens array (SLA) 6 and original 7. An area out of an effective sensor read range at the end part of the transparent protecting plate 1 is formed as the gradient shape, and this gradient-shaped part lower than the surface of the transparent protecting plate 1 is held at a position lower than the surface of the transparent protecting plate 1 without protruding the holding plate 2 from the surface of the transparent protecting plate 1. Thus, the force for holding transparent protecting plate can be stabilized.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a contact image sensor having a transparent protective plate between a sensor section and a document, and an information processing device using the same, and particularly relates to an information processing device using the same. The present invention relates to a contact type image sensor with an improved mounting method and an information processing device using the same.

[Prior art] When holding a transparent protective plate between the sensor part of a contact type image sensor and a document, a protrusion is provided on the document passing surface (top surface of the transparent protective plate) so as not to interfere with document feeding. It is important to keep things clear. Conventionally, there are three main methods for this purpose.

In the first method, as shown in Fig. 2, the short side end of the glass 1 serving as a transparent protection plate is processed into a sloped shape, and a glass holding plate 2 having a shape as shown in the figure is attached to the casing from the top. This is a method of fixing it to the body 3. However, FIG. 2 (Δ) is a partial front view of the contact type image sensor, and FIG. 2 (B) is a side view thereof.

The second method is to fix one side of the glass 1 in the longitudinal direction to the housing 3 with a glass holding plate 2, as shown in FIG. However, FIG. 3(A) 4j is a partial front view of the contact type image sensor, and FIG. 3(B) is a side view thereof.

A third method is a method in which the transparent protection plate 1 and the housing pair 3 are bonded together without using the holding plate 2.

[Problems to be Solved by the Invention] However, in the first method of the conventional example shown in FIG. 2, it is difficult to design the force f for holding the glass as a transparent protective plate. There are challenges. This is because if the force f is too large, the longitudinal center of the glass 1 will float, whereas if the force f is too small,
This is because the structure is such that the sloped portion of the glass 1 is held down by the edge E of the holding plate 2, which makes the holding force unstable and causes the glass to chip. In addition, since the glass is held by pressing the edge E, the slope angle of glass 1, the total length,
If each length of the casing 3 is not precisely machined, it is difficult to securely hold the housing 3, and in order to precisely machine the housing 3, the varnish must be varnished from 1 to 100%, which is a problem to be solved.

In the second method, as shown in FIG. 3(B), one side of the longitudinal part of the glass 1 is fixed by the holding plate 2, so in order to stabilize the glass holding force, it is necessary to It is necessary to press the entire long part. For that reason,
There is a problem to be solved that the holding plate 2 needs to be made thicker, which increases the cost.

Further, since the holding plate 2 is provided on the upper surface of the glass 1, there is a restriction that the direction S in which the document passes is limited. This means that when the original is inserted from the opposite side, the leading edge of the original will be placed on the holding plate 2.
This is because you will get caught up in it. To solve this problem, there is a way to install a new paper ejection guide, but the parts
There are issues that need to be resolved, such as increased steps and higher costs.

The third method requires a step of adhering the cover glass 1 as a transparent protection plate and the housing 3 while paying attention to their alignment, which causes manufacturing difficulties. In addition, adhesion makes it difficult to disassemble the sensor during repair and maintenance, making the work difficult and making it difficult to recycle the parts, which is a problem that needs to be solved.

[Means for Solving the Problems] The present invention was developed as a result of intensive research to solve the above-mentioned problems, and the contact type image sensor of the present invention comprises: a part of the sensor and a manuscript. In a close-contact image sensor having a transparent protection plate between the transparent protection plate, an area outside the sensor reading effective range at the end of the transparent protection plate is formed into a sloped shape, and the sloped portion lower than the surface of the transparent protection plate is formed into a slope shape. At a position lower than the height of the surface of the transparent protection plate,
The transparent protective plate retaining plate is characterized in that the retaining plate does not protrude from the surface of the transparent protective plate (is held by the surface of the transparent protective plate retaining plate).

Moreover, in order to solve the above-mentioned problem, the present invention provides an information processing apparatus characterized in that it is configured to include the above-mentioned contact type image sensor.

[Function] According to the present invention, the sloped lower surface portion of the end of the transparent protective plate can be held flat by the holding plate having the same sloped shape, so that it is possible to hold the sloped lower surface portion of the end of the transparent protection plate flatly, so that it is possible to hold the sloped lower surface portion at the end of the transparent protection plate in a flat manner. Compared to the method of pressing with a hand, since the transparent protection plate and the holding plate are in close contact with each other over a certain area, it can be held stably.

Furthermore, since the holding force is not concentrated on a portion of the transparent protection plate, phenomena such as cracking can also be prevented.

Further, since the document can be held without protruding from the surface of the transparent protection plate, there is an advantage that the insertion direction of the document is not limited.

[Examples] Examples of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment of the contact type image sensor according to the present invention, and FIG. 1(A) is a top view of the contact type image sensor of the present embodiment, FIG. ) is a side sectional view showing the internal structure.

In FIG. 1, 1 is a cover glass as a transparent protective plate, 2 is a holding plate, 3 is a housing, 4 is a sensor module, 5 is an LED array light source, and 6 is a lens array (hereinafter referred to as SL).
7 is a manuscript.

In FIG. 1 (A), ] is a glass plate (cover glass) as a transparent protective plate with a thickness T = 2.5 mm, and the area outside the sensor reading effective range at both ends is set to a length L = 3 mm. The glass is cut into a gradient shape in the thickness direction, with a diameter of 720.6 mm at the extreme end.

Next, with a holding plate 2 that has been processed to have a sloped surface at the same angle as the sloped surface of 1, hold down the sloped lower surface part of the transparent protection plate 1 from above at the flat part of the holding plate 2 at °C. and hold it.

When holding the transparent protection plate 1, the holding plate 1 is used as shown in Fig. 1(B).
As shown in FIG. 2, a degree of freedom in processing is provided by allowing a margin of approximately R=0.5 mm in the sloped portion. As shown in FIG. 1(B), the contact type image sensor of the present invention has a structure in which the holding plate 2 does not protrude above the transparent protection plate 1.

Further, since the holding plate 2 applies a holding force to the transparent protection plate in a two-dimensional manner by the sloped portion of the cover glass 1, which is a transparent protection plate, it can be fixed in a stable state and reliably.

In this example, the thickness of the glass is T=2.5mmt=
It was set as 0.6 mm, but due to the strength problem of the glass, t, = 1
It is preferable to set it to 15T or more, and it is preferable to set it to R=1/3L or less in order to securely hold it. However, the thickness of the glass and the relationship with the holding plate (T, t, c,
R, etc.) is not limited to the above values or this example, and the retaining plate does not protrude (Gara-1) 81j.

It goes without saying that any value that can maintain the strength of the base and securely fix it in a stable state is sufficient.

In addition, in this embodiment, the transparent protection plate is prevented from cracking by being held flat by the holding plate 2, but a cushioning material such as a rubber sheet is further sandwiched between the holding plate and the transparent protection plate. By assembling them, you can obtain even greater crack prevention effects.

FIG. 4 is a schematic configuration diagram showing an example of a facsimile having a communication function as an image information processing apparatus constructed using the contact type image sensor (sensor unit) according to the present invention as described above.

Here, 102 is a feeding roller serving as a feeding means for feeding the original 7 toward the reading position, and 104 is a feeding roller for feeding the original 7 toward the reading position.
This separation piece is used to reliably separate and feed one sheet at a time. 1
A platen roller 06 is provided at a reading position with respect to the sensor unit 100 to regulate the surface of the document 7 to be read and serves as a conveying means for conveying the document 7.

In the illustrated example, P is a recording medium in the form of a roll paper,
Image information read by the sensor unit 100 or, in the case of a facsimile device, image information transmitted from the outside is reproduced here. Reference numeral 110 denotes 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 conveying 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 and messages for receiving operation input as input/output means, and a display section for notifying the status of the apparatus.

Reference numeral 130 denotes a system control board as a control means, and is provided with a control section (controller) for controlling each section, a drive circuit (driver) for the photoelectric conversion element, an image information processing section (processor), a transmitting/receiving section, and the like. 1
40 is a power source for the device.

As the recording means used in the information processing device of the present invention,
For example, U.S. Pat. No. 4,723,129, U.S. Pat.
Preferably, the typical configuration and principle thereof are disclosed in the specification of No. 0796. 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 to the drive signal. It is effective because it can form . The growth of this bubble,
The contraction causes liquid (ink) to be ejected through the ejection opening to form at least one drop.

Furthermore, as 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, the length can be increased by a combination of multiple recording heads as disclosed in the above-mentioned specification. Either a configuration in which the recording head is swirled or a configuration in which the recording head is integrally formed as a single recording head may be used.

In addition, a replaceable chip-type recording head that is attached to the device body enables electrical connection to the device body and ink supply from the device body, or an ink tank integrated into the recording head itself. The present invention is also effective when a cartridge type recording head is used.

[Effects of the Invention] According to the present invention, since there is no protrusion on the transparent protection plate of the contact type image sensor, a flat document reading surface is achieved, and therefore flexibility in the document feeding direction is obtained. . This also has the effect that even if the document size exceeds the sensor reading range, such as computer paper, the paper can be passed through the sensor reading surface.

Moreover, by pressing and holding the sloped lower surface part of the transparent protection plate in a plane with the flat part of the holding plate, it is possible to stably hold the transparent protection plate.

In addition, because of this holding structure, the transparent protection plate and the holding plate only need to be processed into the same sloped shape, which makes processing easy and has a large degree of freedom, and design and assembly is easy and can be implemented at low cost. .

Furthermore, since no adhesive is used, it is easy to disassemble and assemble during repair and maintenance, and parts can be recycled.

[Brief explanation of the drawing]

FIG. 1 shows a top view (A) and a front view (B) of an embodiment of the present invention.
), and a side sectional view (C), FIG. 2 is a front view (A) and side view (B) of a contact type image sensor showing a conventional transparent protection plate holding method, and FIG. A front view (Δ) and a side view (B) of a conventional contact type image sensor holding one longitudinal side of a transparent protective plate, and FIG. 4 show image information processing configured using the contact type image sensor according to the present invention. 1 is a diagram illustrating an example of a facsimile device having a communication function.

Claims (3)

[Claims] (1) In a close-contact image sensor having a transparent protection plate between the sensor unit and the document, the area outside the sensor reading effective range at the end of the transparent protection plate is shaped like a slope and is lower than the surface of the transparent protection plate. the gradient-shaped portion at a position lower than the height of the surface of the transparent protection plate;
A close-contact image sensor characterized in that the holding plate is held by the surface of the transparent protection plate holding plate without protruding from the surface of the transparent protection plate. (2) The contact image sensor according to claim 1, wherein the transparent protection plate is made of glass. (3) An information processing device comprising the contact image sensor according to claim 1.