JPH01313232A - Reader for image information - Google Patents

Abstract

PURPOSE:To miniaturize the device by unification by moving an original in the sending direction on an oscillating plate as an original table with application of high frequency wave. CONSTITUTION:A copy 20 which is suppressed and adheres on the surface of an oscillating plate 12 is moved in the sending direction D with an oscillator 11 and the oscillating plate 12, by application of a high frequency wave generating source 10. A suppressing roller 13 gives a moving speed to the original 20 with suitable suppressing force F, and at the same time is rotated following to movement of the original 20. Consequently more precise image information can be read, when rotation of the suppressing roller 13 is detected and synchronized with scanning of a close contact type image sensor 30. The suppressing roller 13 has a role to suppress the original 20 on the oscillating plate 12, a driving mechanism is unnecessary, integration of the high frequency wave generating source 10 is possible in an electronic circuit, therefore the source can be receivable in the image sensor 30.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is characterized in that a light source illuminates the screen of a manuscript paper moving on the surface of a manuscript table, and an optical sensor reads the reflected light as image information of the screen and outputs it. The present invention relates to an image information reading device.

[Conventional technology]

Conventional image information reading devices have a mechanism in which the original paper on the surface of a flat glass platen platen is moved in the feeding direction by the pressing force and rotational drive of a feeding roller and a sending roller, and a mechanism that moves the original paper on the surface of a flat glass platen platen in the feeding direction, and the rotational speed of the roller, that is, the moving speed of the original paper. A readable image sensor 30 reads the screen of a manuscript paper using irradiation light that passes through the glass plate from the back side of the glass plate in synchronization with the image sensor 30, a document table 91 made of a glass plate integrated with this sensor 30, It has a feed roller 92 that presses and feeds the document paper 20 upward, a feed roller 93 that presses and feeds the document paper 20 on the document table 91, and a roller drive mechanism 94 that drives and rotates these rollers. The fixed image sensor 30 includes a light source 31, a lens 32, and a light sensor.
It has 33.

The irradiated light from the light source 31 is transmitted through the document table 91 and is applied to the document paper 2.
The reflected light is reflected by the screen of 0 and collected by the lens 32, and the collected reflected light is read by the optical sensor 33 as image information. The reading speed of the optical sensor 33 is controlled by a roller drive mechanism 94 so as to be synchronized with the moving speed of the original paper 20. The feed roller 92 and the feed roller 93 press the manuscript paper 20 onto the manuscript table 91 with suppressing forces f, f2, respectively, and move the manuscript paper 20 in the feeding direction with a predetermined frictional force using rotational forces R1 and R2. The roller drive mechanism 94 transmits synchronization information between the feed roller 92 and the contact image sensor 30 through the use of mechanical structures such as gears.

[Problem to be solved by the invention]

As mentioned above, conventional image information reading devices are configured so that a mechanical drive mechanism drives the rotation of the roller that moves the original paper on the surface of the original platen, so there is a problem that the size cannot be avoided. There was a point.

SUMMARY OF THE INVENTION An object of the present invention is to provide an image information reading device that solves the above-mentioned problems by using an electric driving circuit to move the original paper.

[Means to solve the problem]

An image information reading device according to the present invention is an image information reading device in which a light source illuminates the screen of a document sheet moving on the surface of a document table, and an optical sensor reads and outputs the reflected light as image information on the screen. a high-frequency generation source that generates an oscillator; The vibrator, whose surface coincides with the feeding direction of the manuscript paper, is closely fixed to the back surface, and the manuscript paper is placed on the surface of the vibrating plate, which becomes at least a part of the manuscript table, and the manuscript paper on the vibrating plate. and a suppression mechanism that suppresses the diaphragm with a predetermined suppression force.

[Effect]

In the image information reading device using the above-mentioned means, by applying high frequency waves of a predetermined phase to the vibrator, the diaphragm moves the surface in a wavy manner, thereby moving the document paper on the surface.

〔Example〕

Next, an image information reading device of the present invention will be explained with reference to the drawings.

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention. In FIG. 1, the image information reading device includes a high frequency generation source 10. Vibrator 11. The contact image sensor 30 includes a diaphragm 12 made of a glass flat plate, a suppression roller 13, and a contact image sensor 30. The contact image sensor 30 includes a light source 31. It has a lens 32 and an optical sensor 33.

Since the contact type image sensor 30 has been explained with reference to FIG. 4, detailed explanation will be omitted.

FIG. 2 is a side view and a rear view showing an example of details of the vibrator 11 and diaphragm 12 shown in FIG. 1. In FIG. 2, the vibrator 11 includes 18 piezoelectric elements 14 made of ceramic plates, each having a width of 4.85 mm, a length of 18.5 mm, and a thickness of 0.5 mm, arranged horizontally, and a diaphragm 12 made of a flat glass plate. A patch is attached to the back.

FIG. 3 is an explanatory diagram showing an example of the movement of the piezoelectric element 14 in FIG. 2. When the piezoelectric element 14 resonates with a high frequency power source that becomes an ultrasonic wave, as shown in FIG. 3 (1) to (4),
-The point rides the high-frequency waveform and draws an elliptical orbit. Therefore,
The vibrator 11 in which the piezoelectric elements 14 are arranged generates undulations due to wave motion, and also transmits the ultrasonic wave motion to the diaphragm 12 in close contact with the vibrator 11 .

FIG. 4 is a configuration explanatory diagram showing an example in which the power source of the high frequency generation source 10 is connected and applied to the vibrator 11 and the diaphragm 12 of FIG. 2. In FIG. 4, the same components as in FIGS. 2 and 3 are given the same numbers and symbols, and their explanations will be omitted. In FIG. 4, the power source E of the high frequency generation source 10 is shown. 5in
(ω = 1φ) is the piezoelectric element 14 at both ends of the vibrator 110.
In addition, the power source Eosinωt is connected to the central part of the vibrator 11.
It is connected to two piezoelectric elements 14, respectively, and coupled to the earth via a diaphragm 12 that is in close contact with it. The original paper 20 placed on the surface of the diaphragm 12 is pushed onto the diaphragm 12 by the suppression roller 13.
is suppressed by a suppressing force F, for example, the weight of the suppressing roller 13. The diaphragm 12, which generates wave-like vibrations when the high frequency generation source 10 is connected and applied, moves the original paper 20, which has been suppressed by the suppression roller 13, in the feeding direction indicated by the arrow, using a suppression force F.

For example, in one experiment, it was reported that when the high frequency phase at 26.6kHz moves in the positive direction from 0 degrees to 135 degrees, it does not move at 180 degrees, but moves in the negative direction at 225 degrees. There is. Therefore, in this example, the forward and reverse feeding directions can be switched between 45 degrees and 225 degrees of phase.

Here, the explanation will be returned to FIG. 1. In Figure 1, the second
The same components shown in FIGS. 4 to 4 are given the same numbers and symbols, and their explanations will be omitted. Upon application of the high frequency source 10, the vibrator 11 and the diaphragm 12 move the original paper 20, which is pressed and closely attached to the surface of the diaphragm 12, in the feeding direction according to the above-described principle. The suppression roller 13 applies a moving speed to the original paper 20 with an appropriate suppression force F, and rotates as the original paper 20 moves. Therefore, when the rotation of the suppression roller 13 is detected and synchronized with the scanning of the contact image sensor 30, more accurate image information can be read out. The suppression roller 13 has the role of suppressing the original paper 20 against the diaphragm 12, and does not require a driving mechanism, and the high frequency generation source 10 can be highly integrated with an electronic circuit, and the contact type image sensor 30 shown in the figure It can be stored inside.

In the above embodiment, the suppression roller suppresses the original paper onto the surface of the glass flat plate, but the coefficient of friction allows the original paper to be pressed against the surface of the glass flat plate and the original paper is moved in the feeding direction by the vibration of the glass flat plate. If the relationship is as follows, the device that holds down the manuscript paper is not limited to the roller. In addition, in the case of a structure in which an optical sensor reads image information using reflected light from a light source that illuminates the surface of a diaphragm with a vibrator tightly fixed to the back, the diaphragm that serves as the document table is not a flat glass plate but a thin steel plate.
A synthetic resin plate or the like may also be used. Furthermore, only the irradiated light reflecting surface of the manuscript table is made of a flat glass plate, while the manuscript paper feed section and delivery section are each made up of metal diaphragms with good feeding efficiency, and are configured as part of the document table. be able to.

〔Effect of the invention〕

As explained above, according to the image information recording device of the present invention, the diaphragm, in which piezoelectric elements are arranged and tightly fixed to the back surface as a vibrator, can be used to generate high frequency waves from an electronic circuit and apply high frequency waves to the vibrator by a device. Since it has a structure that vibrates and moves the original paper on a diaphragm serving as a document table in the feeding direction, the contact type image sensor, drive system electronic circuit, and document table can be integrated, and the device can be made smaller. This has the effect of being able to.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the image information recording device of the present invention, FIG. 2 is a partial detailed diagram of FIG. 1, and FIGS.
(4) is an explanatory diagram showing an example of the operation of the part in Figure 1;
FIG. 5 is a configuration explanatory diagram showing an example of the partial configuration of FIG. 1, and FIG. 5 is a configuration explanatory diagram showing an example of the conventional configuration. 10... High frequency generation source, 11... Vibrator, 12... Vibration plate (document stand), 13...
... Suppression roller (suppression mechanism), 14 ... Piezoelectric element, 20 ... Manuscript paper, 30 ... Contact type image sensor - 0 agent Patent attorney Hara Uchi
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Claims (1)

[Claims] An image information reading device in which a light source illuminates a screen of manuscript paper moving on the surface of a manuscript table, and an optical sensor reads and outputs the reflected light as image information on the screen, includes a high frequency generation source that generates a predetermined high frequency; A vibrator is formed by arranging a plurality of piezoelectric elements that draw an elliptical orbit and resonantly rotate high-frequency generation sources by independently connecting them in a direction parallel to the elliptical orbital plane, and the elliptical orbital plane is aligned in the feeding direction of the manuscript paper. The matched vibrators are closely fixed to the back surface, and a manuscript paper is placed on the surface, and a diaphragm that becomes at least a part of the manuscript table and the manuscript paper on this diaphragm are pressed against the diaphragm with a predetermined suppressing force. An image information reading device comprising: a suppression mechanism for suppressing image information.