JPH0575785A - Picture reader and information processing unit using the reader - Google Patents

Abstract

PURPOSE:To realize the picture reader in which a light source is positioned more accurately, easily at a low cost with respect to the picture reader formed by supporting the light source exposing an original and a light sensor to a frame integrally. CONSTITUTION:In the picture reader formed by supporting a light source exposing an original and a light sensor to a frame integrally, the side face B of a lamp house 3 of a light source 2 is used for a positioning reference face and the side face is butted to a butt face A of the frame 1 for positioning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus constructed by integrally holding a light source and an optical sensor in a frame, and more particularly to an image reading apparatus having an improved light source positioning method.

[0002]

2. Description of the Related Art FIG. 3 is a sectional view of a conventional image reading apparatus.

In the figure, reference numeral 2 is a light source for illuminating an original document (not shown) on the cover glass 9. The optical axis 8 of the light emitted from this is reflected on the original surface, and the short focus image forming element array 1 is formed.
0 converges on the sensor array 4. With the photoelectric conversion function, the sensor array 4 can read the image information of the document as an electric signal.

The following two methods have been carried out as the method for mounting and positioning the light source 2 in the conventional image reading apparatus having a light source. (1) As shown in FIG. 3, the end of the substrate 7 of the light source 2 is abutted against the abutting surface C of the frame 1 for positioning. (2) As shown in FIG. 3, positioning is performed with the screw 6 for fixing the light source 2.

[0005]

However, in the method (1) of the above-mentioned conventional example, it is difficult to maintain the dimensional accuracy from the center of the optical axis of the light source 2 and the end of the substrate 7. There is a problem that the required optical axis 8 of the light source 2 is displaced.

Further, in the method (2) of the conventional example, there is a problem that the cost increases because accuracy of the screw through hole of the light source 2 and the tap hole of the frame 1 is required.

[0007]

In order to solve the above-mentioned problems, the present invention provides an image reading apparatus constructed by integrally holding a light source for illuminating an original and an optical sensor in a frame. , Side B of the lamp house 3 of the light source 2
As the positioning reference surface, the abutting surface A of the frame 1
The present invention provides an image reading device characterized in that it is positioned by abutting against.

According to the present invention, the side surface B of the lamp house 3 located as close as possible to the center of the optical axis of the light source 2 is used as the positioning reference surface of the light source 2 and is brought into contact with the abutting surface A of the frame 1, More accurate positioning can be performed easily and at low cost.

[0009]

1 and 2 show an embodiment of the present invention, FIG. 1 is an enlarged side view showing an internal structure of an image reading apparatus, and FIG. 2 is an entire image reading apparatus showing the internal structure. FIG.

In the figure, 1 is a frame for constituting each component, 2 is a light source for illuminating an original, 3 is a light source lamp house, 4 is a sensor array, 5 is an original, 9 is a cover glass, and A is A. The light source abutting surface formed on the frame,
B is a reference surface for positioning the side surface of the lamp house 3.
Reference numeral 10 denotes a short-focus image forming element array that guides the reflected light from the original 5 to the sensor array 4, and by this, the light incident on the sensor array 4 is converted into an electric signal by a photoelectric conversion function to convert the image signal of the original 5 into an electric signal. It is readable.

Next, the structure relating to the positioning of the light source of the present invention in the embodiment will be described.

The frame 1 has a shape shown in the external perspective view of FIG. 2 and has a length of about 300 mm in the longitudinal direction, and the light source 2 is also the same, so that the abutting surface A of the frame 1 and the light source 2 are the same. The light source 2 is abutted against the frame 1 so that the side surface B of the lamp house is in contact with the entire length of the lamp house, and in that state, it is fixed by the mounting screw 6.

Further, the abutting contact portion is provided at least at two places including the vicinity of both ends in the longitudinal direction even if it does not extend over the entire length, and the lamp house 3 or the frame 1 having such a shape can be used in the present invention. The effect of is obtained similarly.

Next, FIG. 4 is a schematic sectional view showing an example of a facsimile having a communication function as an information processing apparatus constructed by using the sensor unit 100 of the image reading apparatus of the present invention.

Here, 102 is a feeding roller as a feeding means for feeding the document Q toward the reading position, and 104.
Is a separating piece for surely separating and feeding the documents Q one by one. Reference numeral 106 denotes a platen roller which is provided at a reading position with respect to the sensor unit 100, regulates a surface to be read of the document Q, and serves as a conveying unit that conveys the document Q.

In the illustrated example, P is a recording medium in the form of a roll paper, and the image information read by the sensor unit 100 or the image information transmitted from the outside in the case of a facsimile machine or the like is reproduced here. Reference numeral 110 denotes a recording head as recording means for performing the image formation, and various types such as a thermal head and an inkjet recording head can be used. The recording head may be a serial type or a line type. Reference numeral 112 denotes a platen roller as a conveying unit that conveys the recording medium P to the recording position of the recording head 110 and regulates the recording surface thereof.

Reference numeral 120 denotes an operation panel provided with a switch for receiving an operation input as an input / output means, a message, and a display section for notifying the state of the apparatus.

Reference numeral 130 denotes a system control board as a control means, which includes a control section (controller) for controlling each section, a drive circuit (driver) for the photoelectric conversion element,
An image information processing unit (processor), a transmission / reception unit, and the like are provided. 140 is the power supply of the device.

Recording means used in the information processing apparatus of the present invention includes, for example, US Pat.
It is preferable that the specification and the principle of 4740796 are disclosed. According to this method, at least one of the electrothermal converters arranged corresponding to the sheet or the liquid path holding the liquid (ink) gives a rapid temperature rise corresponding to the recorded information and exceeding the nucleate boiling. When a drive signal is applied, heat energy is generated in the electrothermal converter, causing film boiling on the heat-acting surface of the recording head. As a result, bubbles in the liquid (ink) that correspond one-to-one to this drive signal. Is effective because it can form The growth of this bubble,
The contraction causes the liquid (ink) to be ejected through the ejection opening to form at least one droplet.

Further, as a full line type recording head having a length corresponding to the width of the maximum recording medium which can be recorded by the recording device, a combination of a plurality of recording heads as disclosed in the above-mentioned specification is used. Either a structure that satisfies the length or a structure as one recording head integrally formed may be used.

In addition, the ink can be attached to the replaceable chip type recording head, or the recording head itself, which can be electrically connected to the apparatus main body and can be supplied with ink from the apparatus main body by being attached to the apparatus main body. The present invention is also effective when a cartridge-type recording head provided integrally with a tank is used.

[0022]

As described above, according to the present invention, the light source 2 is mounted and positioned by abutting the side surface of the lamp house 3 closer to the optical axis center of the light source 2 on the frame as a positioning reference surface. Therefore, the effect that the deviation of the optical axis can be suppressed to the minimum is obtained.

Further, as in the conventional case, the processing precision of the parts (the light source 2
Screw through hole and light source mounting tap of frame 1)
Since there is no need to raise or increase the precision of assembly work, accurate positioning can be easily achieved at low cost.

Further, since it is not necessary to perform the positioning by the fixing means of the light source 2, it becomes possible to adopt more free fixing means such as adhesive fixing as the fixing means of the light source 2 in addition to the screw fixing. This has the effect of increasing the degree of freedom in assembly design.

[Brief description of drawings]

FIG. 1 is a side view showing the internal structure of an image reading apparatus embodying the present invention.

FIG. 2 is a perspective view of the entire apparatus showing the internal structure of an image reading apparatus embodying the present invention.

FIG. 3 is a side view of an internal structure showing a conventional technique.

FIG. 4 is a sectional view of a facsimile apparatus as an information processing apparatus equipped with the image reading apparatus of the present invention.

[Explanation of symbols]

 1 frame 2 light source 3 light source lamp house 4 sensor array 5 original 6 light source mounting screw 7 light source substrate 8 optical axis 9 cover glass A frame light source abutting surface B lamp house side surface C light source substrate end surface

Claims (3)

[Claims] 1. An image reading apparatus constructed by integrally holding a light source for irradiating a document and an optical sensor in a frame, wherein a side surface B of a lamp house 3 of the light source 2 is used as a positioning reference surface. The image reading device is characterized in that the light source 2 is positioned by abutting against the abutting surface A of the above. 2. The abutting surface A of the frame and the side surface B of the lamp house 3 of the light source are positioned in contact with each other at least near both ends in the longitudinal direction of the image reading apparatus. The image reading device described in 1. 3. An information processing apparatus having the image reading apparatus according to claim 1 and a unit for holding a document at a document reading position of the image reading apparatus.