JPH05103155A - Contact type image sensor and information processor using the same - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a contact image sensor in which burrs and the like at the ends of the short-focus imaging element array are prevented from being erroneously read due to dust generated by rubbing against the housing. A contact type having a plurality of photoelectric conversion elements arranged in rows, a short-focus imaging element array arranged along the arrangement direction of the photoelectric conversion elements, and a casing integrally supporting them. The image sensor has a means for supporting and fixing the short focus imaging element array to the housing without contacting an end portion of the short focus imaging element array in the optical axis direction. Sensor.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact image sensor and an information processing apparatus using the same, and more particularly to a supporting and fixing means for a short focus image forming element array of the contact image sensor.

[0002]

2. Description of the Related Art FIG. 3 is a schematic sectional view showing a conventional contact image sensor. In the figure, reference numeral 1 denotes a sensor chip provided on a ceramic substrate 2, and a plurality of photoelectric conversion elements are arranged in a line on the sensor chip 1. Further, 4 is a short-focus imaging element array (focusing rod lens array) provided on the upper surface of the sensor chip 1, 5
Is an LED (light emitting diode) light source arranged in parallel with the sensor chip 1, 6 is a document surface glass, 3C is a housing,
The short-focus imaging element array 4, the LED light source 5, the document surface glass 6, and the ceramic substrate 2 are arranged and fixed. Reference numeral 7 is a bottom plate for pressing and fixing the ceramic substrate 2 from the back surface. Reference numeral 8 is a point screw for pressing and fixing the short-focus image forming element array 4 on the housing 3C.

Reference numeral 10 is a short focus image forming element array supporting portion of the housing.

[0004]

However, in the above-mentioned conventional example, when the short focus imaging element array 4 is moved up and down to adjust the focus, the end portion of the short focus imaging element array is connected to the short focal point of the housing. Since it is in contact with the image element array supporting portion 10, burrs, dust, etc. attached to the end surface of the image forming element may drop on the sensor chip 1 and block the light incident on the sensor. There is a problem that image data cannot be read.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has a plurality of photoelectric conversion elements arranged in a row and short electrodes arranged in the arrangement direction of the photoelectric conversion elements. In a contact image sensor having a focus image forming element array and a casing that integrally supports the focus image forming element array, the short focus image forming element without contacting an end portion of the short focus image forming element array in the optical axis direction. It has means for supporting and fixing the array to the housing.

Further, it is characterized in that the casing has a short-focus image forming element array support portion for supporting the end portion of the short-focus image forming element array in the optical axis direction without coming into contact with the end portion.

According to the present invention, in a housing for holding a plurality of photoelectric conversion elements arranged in a row and a short-focus image forming element array arranged along the arrangement direction of the photoelectric conversion elements, an image forming element is provided. By providing an escape (gap) so that the end portion of the child array does not come into contact with the supporting portion of the housing, burrs, dust, and the like at the end of the short focus imaging element array fall on the sensor upper surface due to contact with the housing. This is done so that the light incident on the sensor is not blocked.

[0008]

(Embodiment 1) FIG. 1 is a schematic sectional view showing a first embodiment of the present invention. As in the conventional example shown in FIG. This is a structure in which the array 4 is arranged. In FIG. 1, the same parts as those of the conventional one shown in FIG. 3 are designated by the same reference numerals.

In this embodiment, as shown in FIG.
escape (gap) 9a to the support portion 10 of the housing so that a and the end of the short focus imaging element array 4 in the optical axis direction do not come into contact with each other.
By providing, the imaging element array 4 can be held in the housing 3a without contacting the end portion of the short focus imaging element array. Therefore, the short focus imaging element array 4
Even if the lens is moved up and down to adjust the focus, the end portion of the short focus imaging element array 4 and the support portion 10 do not rub against each other. It does not block the light that falls on the upper surface of the sensor chip 1 and enters the sensor.

(Embodiment 2) FIG. 2 is a schematic structural sectional view showing a second embodiment of the present invention. As in FIG. 1, the end of the short focus image forming element array 4 is provided on the supporting portion 10 of the housing 3b. A clearance (gap) 9b is provided in the housing so that the parts do not come into contact with each other. It is obvious that the same effects as those of the above-described first embodiment can be obtained also in the present embodiment.

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 contact image sensor 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 accepting 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 unit (controller) for controlling each unit, 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 liquid path holding the liquid (ink) gives a rapid temperature rise corresponding to the recorded information and exceeding the nucleate boiling. By applying a drive signal, heat energy is generated in the electrothermal converter, causing film boiling on the heat-acting surface of the recording head, and 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 can be used. Either a structure that satisfies the length or a structure as one recording head integrally formed may be used.

In addition, the ink is 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 supply 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.

[0019]

As described above, according to the present invention, by providing a clearance (gap) in the single crystal imaging element array supporting portion of the housing, the end portion of the short focus imaging element array is located in the housing. It can be held without touching it, and it is possible to prevent burrs and dust from the end of the short focus imaging element array from rubbing against the housing and dropping onto the sensor chip, and blocking the light incident on the sensor. Has the effect of disappearing.

[Brief description of drawings]

FIG. 1 is a sectional view of a contact image sensor according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a contact image sensor according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a conventional contact image sensor.

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

[Explanation of symbols]

 1 Sensor Chip 2 Ceramic Substrate 3a to 3b Housing 4 Short-Focus Imaging Element Array 5 LED Light Source 6 Original Surface Glass 7 Bottom Plate 8 Point Screws for Fixing the Short-Focus Imaging Element Array 9a to 9b Housing Escape (Gap) 10 Short focus imaging element array support

Claims (3)

[Claims] 1. A plurality of photoelectric conversion elements arranged in a row, a short-focus imaging element array arranged along an arrangement direction of the photoelectric conversion elements, and a casing integrally supporting them. In the contact image sensor, there is provided a means for supporting and fixing the short focus imaging element array to the housing without contacting an end portion of the short focus imaging element array in the optical axis direction. Type image sensor. 2. The short focus imaging element array support portion having a structure for supporting the housing without contacting an end portion in the optical axis direction of the short focus imaging element array. The contact image sensor described in. 3. An information processing apparatus comprising the contact image sensor according to claim 1 and a unit for holding a document at a document reading position of the sensor.