JP2003264670A - Reader, and copying machine or compound machine using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reader and a copying machine or a compound machine using the same in which focusing can be performed by smoothly moving a lens without using a complicated tool even in the state of mounting a shield cover. <P>SOLUTION: A shield cover 208 for shielding external light except for output light from a lens 206 for converging reflected light from an original from being incident to an optic/electric converting means 207 for converting the output light from the lens 206 to an electric signal is located between the lens 206 and the optic/electric converting means 207, and the shield cover 208 has a height lower than the height of the lens 206, not to disturb an optical path through the lens 206 and not to cover the upper surface of the lens 206 on the side of the optic/electric converting means 207. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reading device provided with a light-shielding cover for blocking outside light other than light condensed by a lens from entering the photoelectric conversion means, and a copying machine or a compound machine using the same. It is about machines.

[0002]

2. Description of the Related Art Conventionally, there is a reading device having a lens unit configured to block external light other than light condensed by a lens from entering the photoelectric conversion means. This lens unit is provided with a light-shielding cover between the lens and the photoelectric conversion unit in order to block external light other than the output light from the lens that collects the reflected light from the document from entering the photoelectric conversion unit. ing. The structure of the lens unit provided with this light shielding cover was as follows. FIG. 14 is a perspective view of a conventional lens unit having a light shielding cover and an adjuster for adjusting the positions of the lenses.

As shown in FIG. 14, the lens unit 14
00, a light blocking cover 1402 for the lens 1401 is provided. The lens 1401 side of the light shielding cover 1402 covers the entire upper surface and both ends of the lens 1401 on the photoelectric conversion means 1403 side.

On the other hand, on the photoelectric conversion means 1403 side of the light shielding cover 1402, as shown in FIGS. 15 and 16, the photoelectric conversion means mounting plate 14 for mounting the photoelectric conversion means 1403.
04 to prevent outside light from entering between the sponge 140
5 was affixed. FIG. 15 is a cross-sectional view of a conventional lens unit, and FIG. 16 is a view of the conventional lens unit as viewed from above.

By doing so, the light shielding cover 1402 is
On the lens 1401 side, the photoelectric conversion means 1 of the lens 1401
Since the 403 side is completely covered, external light other than the output light from the lens 1401 is blocked from entering the photoelectric conversion unit 1403. On the other hand, in the light shielding cover 1402, on the photoelectric conversion means 1403 side, the sponge 1405 between the light shielding cover 1402 and the photoelectric conversion means mounting plate 1404 allows external light other than the output light from the lens 1401 to be generated by the photoelectric conversion means 1.
It blocks light from entering 403.

Then, assembling the reading optical system including the irradiation means for irradiating the original with light, the mirror for injecting the light from the reading point into the lens 1401, and the lens unit 1400, the irradiation means, the lens 1401, Since the positional relationship between the mirror that makes the light from the reading point incident on the lens 1401 and the photoelectric conversion unit 1403 is delicate, the following procedure is performed.

First, the lens 1401 is fixed to the lens holding base 1406 that holds the lens 1401, and then the positional relationship between the lens holding base 1406 and the photoelectric conversion means mounting plate 1404 is adjusted so that the lens 1401 and the photoelectric conversion means 1403. Determine the distance. Next, attach the light shield cover 1402,
These are placed in the reading device as an integrated lens unit 1400. Next, in order to adjust the positional relationship between the reading point of the reading device and the lens unit 1400, the lens unit 1
Move 400 back and forth. In this way, the adjustment of the entire reading optical system is performed.

[0008]

However, the conventional technique has the following problems.

That is, the positional relationship between the lens 1401 and the photoelectric conversion means 1403 is adjusted in advance to adjust the lens unit 140.
After forming 0, the reading point of the reading device and the lens unit 1
It is not enough to adjust the positional relationship with 400, and strictly speaking, there is a limit to improving the reading accuracy. This is because when the positional relationship with the reading point is adjusted, the lens 140
This is because the positional relationship between 1 and the photoelectric conversion unit 1403 cannot be corrected. Reading point and lens unit 1
Magnification adjustment is improved by adjusting the positional relationship with 400, but the lens 1401 and the photoelectric conversion means 1
Focus is improved by adjusting the positional relationship with 403. In a normal case, the blurring of the magnification has a greater influence on the reading than the blurring of the focus, and therefore, if the blurring of the magnification is adjusted, the reading accuracy is not significantly adversely affected. However, focus adjustment is indispensable to further improve the reading accuracy.

The focus adjustment is performed by finally adjusting the holding position of the lens 1401 after the magnification adjustment is completed with the lens unit 1400 incorporated in the reading device. However, the lens 1401 itself is the photoelectric conversion means 140.
The light shielding cover 1402 covers the third side. For this reason,
As shown in FIG. 14, the exposed cylindrical outer peripheral portion of the lens 1401 not covered with the light shielding cover 1402 is fixed to the jig 140.
It is necessary to move the lens 1401 by holding the lens 1401 and moving the jig 1407 with the adjuster 1408. In this case, the jig 1407 holds the cylindrical outer peripheral front end portion of the lens 1401 in a state orthogonal to the moving direction of the lens 1401, so that the lens 1401 is guided along the guide of the lens holding base 1406 shown in FIG. Therefore, it is difficult to smoothly move it, and there is a problem that a complicated jig 1407 is required to realize it.

On the other hand, once the light blocking cover 1402 is removed from the lens unit 1400, the lens 1401 can be held between the front end and the rear end and held parallel to the moving direction. As a result, the lens 1401 can be smoothly moved along the guide 1409 of the lens holding base 1406. However, in this case, the light blocking cover 140
Since No. 2 is removed, focus adjustment is performed in the presence of stray light, and there is a problem that strict focus adjustment cannot be performed.

The light-shielding cover 1402 covers the entire lens 1401 on the side of the photoelectric conversion means 1403. Therefore, the light blocking cover 1402 is attached to the lens 140.
The height of 1 or more is required, and there is also a problem that the device is enlarged by that much.

Further, as can be seen from FIGS. 14 to 16,
A claw portion 1410 is formed on the measuring portion of the light shielding cover 1402. Then, the light shielding cover 1402 has the claw portion 1410.
Is inserted into a hole provided in the lens holding base 1406 so that the lens holding base 1406 can be fixed to the lens holding base 1406. However, the claw portion 1410 is not covered by the light blocking cover 1402.
By forming the notches 1411a and 1411b on the outer wall of the light shielding cover 1402, the light shielding cover 1402 is integrally formed. For this reason, as shown in FIG.
There is a problem that external light enters from the a and 1411b into the light shielding cover 1402, and the light shielding performance deteriorates.

Therefore, the present invention uses the reading device and the reading device which can move the lens smoothly and adjust the focus without using a complicated jig even when the light-shielding cover is attached. The purpose is to provide a copying machine or a multifunction machine.

[0015]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, external light other than the output light from a lens that collects reflected light from an original converts the output light from the lens into an electric signal. A light-shielding cover that blocks light from entering the photoelectric conversion means is disposed between the lens and the photoelectric conversion means, and
The height of the light-shielding cover is lower than the height of the lens and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side.

As a result, since the upper surface of the lens is not covered with the light-shielding cover, the lens can be held between the front end and the rear end with the light-shielding cover attached, and the lens is parallel to the moving direction of the lens. It can be held and moved smoothly. As a result, it becomes possible to perform focus adjustment with the light-shielding cover attached, without using a complicated jig.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A reading device according to a first aspect of the present invention includes a lens for condensing reflected light from a document, photoelectric conversion means for converting output light from the lens into an electric signal, and A height of the light-shielding cover, the light-shielding cover being disposed between the lens and the photoelectric conversion means and blocking external light other than the output light from the lens from entering the photoelectric conversion means, The height is lower than the height of the lens and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side.

By making the height of the light-shielding cover lower than the height of the lens, the upper surface of the lens is not covered with the light-shielding cover. You can hold it with the edge,
The lens can be held in parallel with the moving direction of the lens and moved smoothly. As a result, the focus adjustment can be performed without using a complicated jig with the light shielding cover attached, and the reading accuracy can be improved. Further, since it is not necessary to design the height of the reading device based on the height higher than the lens, the size of the device can be reduced accordingly.

Further, since the height of the light shielding cover is set so as not to obstruct the optical path passing through the lens, even if the height of the light shielding cover is made lower than the height of the lens, the light shielding is performed. Since the cover does not obstruct the optical path, the lens can be moved smoothly during focus adjustment while functioning as a light-shielding cover.

According to a second aspect of the present invention, in the reading apparatus according to the first aspect, the light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covered portion is 2
It has a heavy wall structure, and the inner wall shields external light entering from a groove provided in the outer wall for fixing claws.

In order to fix the light shielding cover to the lens holder, the light shielding cover is provided with fixing pawls. Since the fixing pawl is formed integrally by cutting out the outer wall of the light shielding cover, outside light enters the light shielding cover through the notched groove, and the light shielding performance is deteriorated. Therefore, according to the second aspect of the present invention, the light shielding cover does not cover the upper surface of the lens on the side of the photoelectric conversion means, but covers both sides thereof to block stray light entering from both ends of the lens. It is possible to prevent outside light other than the output light from entering and prevent the reading accuracy from deteriorating.

In addition, the part that covers both sides of the lens is
By adopting a heavy wall structure, it is possible to block external light entering from the groove provided in the outer wall for the pawl for fixing with the inner wall,
Since the pawl for fixing is provided, it is possible to prevent stray light from entering the photoelectric conversion element even from a small gap, and to prevent the reading accuracy from deteriorating.

According to a third aspect of the present invention, in the reading device according to the first aspect or the second aspect, a photoelectric conversion means mounting plate for mounting photoelectric conversion means is provided, and the photoelectric conversion means mounting plate has an upper side thereof. It is bent to the lens side, and the photoelectric conversion means side of the light shielding cover is inserted and fixed below the bent portion of the photoelectric conversion means mounting plate.

Thus, the upper side of the photoelectric conversion means mounting plate on which the photoelectric conversion means is mounted is bent toward the lens side, and the photoelectric conversion means side of the light shielding cover is inserted below the bent portion, thereby forming the structure of the light shielding cover. Since the stray light that enters between the light-shielding cover and the photoelectric conversion means can be blocked by only this, a sponge for blocking the stray light can be omitted, and the number of parts can be reduced and the cost can be reduced.

According to a fourth aspect of the present invention, in the reading apparatus according to the first aspect or the second aspect, a photoelectric conversion means attachment plate for attaching photoelectric conversion means is provided, and the photoelectric conversion means attachment plate has an upper side thereof. Bend to the lens side, and the photoelectric conversion means side of the light-shielding cover is provided with an eaves portion protruding toward the photoelectric conversion means side on its upper side, and the eaves portion is inserted below the bent portion of the photoelectric conversion means mounting plate. Take a fixed configuration.

As described above, the photoelectric conversion means side of the light-shielding cover is provided with the eaves portion on the upper side thereof so as to project toward the photoelectric conversion means side, and the eaves portion is inserted below the bent portion of the photoelectric conversion means mounting plate. Even when the photoelectric conversion means mounting plate is moved back and forth and left and right during the magnification adjustment or the focus adjustment by inserting, the eaves portion of the light shielding cover is provided between the light shielding cover and the photoelectric conversion means mounting plate. Therefore, it is possible to prevent a gap from being formed between the light-shielding cover and the photoelectric conversion means mounting plate for magnification adjustment or focus adjustment, and it is possible to reliably prevent stray light from entering and deteriorate reading accuracy. .

A copying machine according to a fifth aspect of the present invention is a lens for condensing reflected light from an original, photoelectric conversion means for converting output light from the lens into an electric signal, the lens and the photoelectric converter. A light-shielding cover which is disposed between the light-converting means and an external light other than the output light from the lens and blocks light from entering the photoelectric conversion means, and the height of the light-shielding cover is equal to the height of the lens. The height is lower than the height and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side.

According to a sixth aspect of the present invention, in the copying machine according to the fifth aspect, the light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covering portion has a double wall structure. The inner wall shields the external light entering from the groove provided in the outer wall for the fixing claw.

According to a seventh aspect of the present invention, in the copying machine according to the fifth aspect or the sixth aspect, a photoelectric conversion means mounting plate for mounting photoelectric conversion means is provided, and the photoelectric conversion means mounting plate has an upper side thereof. It is bent to the lens side, and the photoelectric conversion means side of the light shielding cover is inserted and fixed below the bent portion of the photoelectric conversion means mounting plate.

According to an eighth aspect of the present invention, in the copying machine according to the fifth aspect or the sixth aspect, a photoelectric conversion means mounting plate for mounting photoelectric conversion means is provided, and the photoelectric conversion means mounting plate has an upper side thereof. Bend to the lens side, and the photoelectric conversion means side of the light-shielding cover is provided with an eaves portion protruding toward the photoelectric conversion means side on its upper side, and the eaves portion is inserted below the bent portion of the photoelectric conversion means mounting plate. Take a fixed configuration.

A compound machine according to a ninth aspect of the present invention is a lens for condensing reflected light from an original, photoelectric conversion means for converting output light from the lens into an electric signal, the lens and the photoelectric converter. A light-shielding cover which is disposed between the light-converting means and an external light other than the output light from the lens and blocks light from entering the photoelectric conversion means, and the height of the light-shielding cover is equal to the height of the lens. The height is lower than the height and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side.

A tenth aspect of the present invention is the composite machine according to the ninth aspect, wherein the light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covered portion is 2
It has a heavy wall structure, and the inner wall shields external light entering from a groove provided in the outer wall for fixing claws.

According to an eleventh aspect of the present invention, in the multifunction machine according to the ninth aspect or the tenth aspect, a photoelectric conversion means attachment plate for attaching photoelectric conversion means is provided, and the photoelectric conversion means attachment plate has an upper side thereof. It is bent to the lens side, and the photoelectric conversion means side of the light shielding cover is inserted and fixed below the bent portion of the photoelectric conversion means mounting plate.

According to a twelfth aspect of the present invention, in the composite machine according to the ninth aspect or the tenth aspect, a photoelectric conversion means attachment plate for attaching photoelectric conversion means is provided, and the photoelectric conversion means attachment plate has an upper side thereof. Bend to the lens side, and the photoelectric conversion means side of the light-shielding cover is provided with an eaves portion protruding toward the photoelectric conversion means side on its upper side, and the eaves portion is inserted below the bent portion of the photoelectric conversion means mounting plate. Take a fixed configuration.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a copying machine 100 equipped with a reading device according to an embodiment of the present invention.
As shown in FIG. 1, the copying machine 100 is provided with a reading device 101 for reading a document on an upper part, and a paper feeding device under the reading device 101.
Main unit 102 for executing transfer, recording, and fixing processing
Equipped with.

A paper feed cassette 103 is installed around the bottom of the main unit 102. Paper feed cassette 103
Can be removed from the front of the copying machine 100 shown in FIG. The configuration of the paper feed cassette 103 will be described later.

The uppermost sheet of the sheet bundle set in the sheet cassette 103 is taken out by the pickup roller 104. In addition, as shown in FIG.
Has three paper feed cassettes similar to the paper feed cassette 103.

The sheet taken out from the sheet feeding cassette 103 is sent by a sheet feeding roller 105 from a bottom portion of the main body unit 102 to a sheet path 106 formed upward. The paper path 106 includes a plurality of transport rollers 107, 1
08 and 109 are arranged.

The sheet conveyed by the conveying roller 109 arranged at the uppermost position is conveyed to the registration roller 111 by the conveying roller 110. Registration roller 111
The photosensitive drum 112 that rotates is provided at
Are arranged.

Above the photoconductor drum 112, an LSU (Laser) for forming a latent image on the surface of the photoconductor drum 112.
Scan Unit) 113 is arranged. Photoconductor drum 1
A developing device 114 for adhering toner to the latent image formed on the photosensitive drum 12 is disposed adjacent to the photosensitive drum 112. Inside the developing device 114, a stirring roller that stirs and conveys the developer and a developing roller that attaches toner to the photosensitive drum 112 are provided.

Below the photoconductor drum 112, a transfer device 115 for transferring the image formed by the developer adhering to the photoconductor drum 112 onto the conveyed paper is installed. The registration roller 111 controls the position adjustment between the image on the photosensitive drum 112 and the recording area of the paper.

Photosensitive drum 112 on which the image has been transferred
Unit 116 for cleaning the surface of
Are arranged adjacent to the photosensitive drum 112. The sheet on which the image is transferred is further conveyed by the conveyor belt 117. The fixing unit 1 is provided at the conveyance destination of the conveyance belt 117.
18 are arranged.

The fixing unit 118 includes a fixing roller 119.
And the pressure roller 12 arranged to face the fixing roller 119.
It has 0. The fixing roller 119 applies heat to the recording surface of the sheet, and the pressure roller 120 presses the sheet against the fixing roller 119, whereby the image is fixed on the sheet.

The sheet discharged from the fixing unit 118 is discharged to the outside of the main body unit 102 by the discharge roller 121. The sheet discharged from the main body unit 102 is received on the sheet discharge tray 122.

A switching guide 124 is provided between the fixing unit 118 and the discharge roller 121 to switch between discharging the paper to the outside of the main body unit 102 and sending it to a double-sided path 123 for double-sided recording. The double-sided path 123 is composed of a portion (123A) formed in the downward direction from the vicinity of the switching guide 124 and a portion (123B) formed in the substantially horizontal direction on the way.

The sheet fed into the double-sided path 123 is temporarily drawn by the reverse roller 125 into the reverse path 126 formed on the extension of the downwardly formed portion 123A of the double-sided path 123. When the sheet is drawn into the reversing path 126, the reversing roller 125 reverses the sheet, and the part 123 of the double-sided path 123 is formed in a substantially horizontal direction.
Send to B. At this point, the front and back of the paper are reversed.

Double-sided path 123B formed in a substantially horizontal direction
The sheet fed into the sheet is conveyed by the conveying rollers 127, 128 and 129 formed on the double-sided path 123B. The double-sided path 123B is connected to the paper path 106 below the transport roller 110. Conveyor rollers 127, 12
The paper that has been conveyed to the paper path 106 by the double-sided path 123B by 8 and 129 is again conveyed to the photoconductor drum 11.
The image is formed on the back side of the sheet 2, which is then fed below.

In addition to the above-described paper feed cassette 103, the copying machine 100 also includes a large-capacity paper feed cassette 130 capable of feeding a large amount of paper.

Next, the structure of the reading device 101 will be described with reference to FIG. FIG. 2 is a top view of the reading device according to the above embodiment. It should be noted that FIG.
It is a figure of the state where the cover of 1 was removed.

A glass surface 200 on which a document is placed is provided on the upper surface of the reading device 101.

Below the glass surface 200 of the reading device 101, a constant velocity carriage 201 is provided. The constant velocity carriage 201 includes a pair of rails 202a and 202b provided on the side wall of the reading device 101 along the longitudinal direction.
It is arranged above and moves on the rails 202a and 202b from the left side to the right side (reading direction) in the drawing. Then, the constant velocity carriage 201 irradiates the document placed on the upper side with light while moving on the rails 202a and 202b, and reflects the light reflected from the document to a half-speed carriage 203 provided on the rear side in the reading direction. send.

The half-speed carriage 203 moves on the rails 202a and 202b at half the speed of the constant-speed carriage 201 in synchronization with the movement of the constant-speed carriage 201. Then, the half-speed carriage 203 reflects the light reflected by the constant-velocity carriage 201 and sends the light to the lens unit 204 provided further forward than the constant-velocity carriage 201 in the reading direction.

The lens unit 204 is the reading device 101.
It is attached to a lens mounting plate 205 provided inside in a direction intersecting the reading direction. A lens 206 for condensing the light sent from the half-speed carriage 203 is provided on the half-speed carriage 203 side of the lens unit 204.
Is provided. The lens 206 is arranged such that its longitudinal direction is parallel to the traveling direction of light.

A CCD 207, which is a photoelectric conversion means for converting the light condensed by the lens 206 into an electric signal, is provided on the opposite side of the lens unit 204 from the half-speed carriage 203. Then, the reading device 101 includes the CCD 2
The information described in the manuscript is read by analyzing the electric signal photoelectrically converted by 07.

Further, the lens 20 of the lens unit 204
A light-shielding cover 208 that blocks outside light other than the output light from the lens 206 from entering the CCD 207 is provided between the CCD 6 and the CCD 207.

Further, in the measuring section of the lens unit 204,
A rack 209 is formed. On the other hand, the lens mounting plate 2
A scale 210 is provided at a position facing the rack 209 of No. 05 along the incident direction of light. Then, the rack 209 of the lens unit 204 is slid along the scale 210 while being engaged with a pinion gear (not shown), so that the lens unit 204 can be moved in the reading direction, that is, the traveling direction of light. ing.

Next, the lens unit 204 will be described in detail. Configuration of lens unit 204 FIG.
~ It demonstrates in detail using FIG. 3 is a perspective view of the lens unit according to the above embodiment, FIG. 4 is a top view of the lens unit according to the above embodiment, and FIG.
FIG. 6 is a perspective view showing a state in which a lens and a light shielding cover are removed from the lens unit according to the above embodiment.

As can be seen from these figures, at the bottom of the lens unit 204, the lens base 30 for mounting the lens unit 204 on the lens mounting plate 205 shown in FIG.
1 is provided. At both ends of the lens base 301,
Mounting portions 302 and 303 for mounting the lens base 301 on the lens mounting plate 205 are provided. Mounting part 30
Reference numerals 2 and 303 denote elongated holes 304 and 305a formed long along the light incident direction, that is, the longitudinal direction of the lens 206.
.About.305c are formed. These long holes 304, 305
The lens base 301 is attached to the lens attachment plate 205 by inserting screws (not shown) into the holes a to 305c and holes (not shown) formed in the lens attachment plate 205. Also, the long holes 304, 305a to 305c
Is formed to be long along the incident direction of light, that is, the direction along the rack 209 provided in the measuring portion of the mounting portion 303 is long, so that the long holes 304, 305a to 305c and the lens mounting plate 205 are formed. By loosening the screw to be inserted into the formed hole, the lens base 301 is attached to the rack 209.
Can be moved along.

In the middle of the lens base 301,
A lens holding hole 306 for holding the lens 206 is formed. The width of the lens holding hole 306 is smaller than the diameter of the lens 206.
It does not fall below 01. Further, the length of the lens holding hole 306 is longer than the length of the lens 206, and the lens holding hole 306 can move in the length direction of the lens holding hole 306 while being held in the lens holding hole 306. .

As shown in FIGS. 3 and 4, the lens 2
The lens holding spring 06 is inserted into the lens holding hole 306 of the lens base 301 and is pressed by the lens pressing spring 307. As shown in FIG. 4, the lens pressing spring 3
A hole 308 is formed at one end of 07. A rectangular square hole 310 is formed at the other end of the lens pressing spring 307.

On the other hand, as shown in FIGS. 3 to 5, a protrusion 309 for hooking the lens holding hole 306 of the lens pressing spring 307 is formed on the side of the lens holding hole 306 of the lens base 301. Also, as shown in FIG.
The hole 50 is provided on the side of the lens holding hole 306 of the lens base 301 where the protrusion 309 is not formed.
1 is formed. Then, as shown in FIG. 3 and FIG. 4, the screw 340 is inserted into the hole 308 of the lens pressing spring 307 and the hole 501 of the lens base, and the protrusion 309 is inserted into the square hole 310 and hooked. The lens 206 is fixed by 307.

Further, as shown in FIGS. 3 to 5, on the CCD 207 side of the lens base 301, a connecting member 311 extending in a direction orthogonal to the longitudinal direction of the lens 206 is attached. The connecting member 311 includes a base portion 328 arranged on the lens base 301 in parallel with the lens base 301, and a base portion 32 connected to the base portion 328.
8 and a vertical portion 330 extending upward at a right angle, and a vertical portion 33.
The lens 206 is connected to 0 at right angles from both ends of the vertical portion 330.
End portions 312 extending to the side and made parallel to the base portion 328
a and 312b are formed.

Further, as shown in FIG. 5, the connecting member 311
The base portion 328 of the pair of holes 329a, 329b.
(Hidden in the washer in FIG. 5, but shown in FIG. 11) is formed. On the other hand, at the position of the lens base 301 facing the holes 329a and 329b of the connection member 311,
A pair of holes (not shown) are provided.

Then, the hole portion 329a of the connecting member 311,
By inserting screws 331a and 331b into holes (not shown) of 329b and lens base 301, connection member 3
11 is attached to the lens base 301.

Further, the holes 329a, 3a of the connecting member 311
The hole portion (not shown) of the lens base 301 that faces 29b is a long hole formed so that the direction intersecting the longitudinal direction of the lens 206 is long. This allows the screws 331
By loosening a and 331b, the connection member 311 can be moved in the lateral direction with respect to the lens base 301 and the CCD 207, that is, in the direction intersecting the light incident direction.

Further, as shown in FIGS. 3 to 5, at both ends of the base portion 328 of the connecting member 311, holes 327a,
327b (shown in FIG. 11 although hidden by screws 317a and 317b in FIG. 5) is formed. In addition, at both ends 312a and 312b of the connecting member 311, holes 313a,
313b (shown in FIG. 11 although hidden by screws 317a and 317b in FIG. 5) is formed.

A CCD mounting plate 31 for mounting the CCD 207 on the CCD 207 side of the connecting member 311.
4 is attached. On the CCD mounting plate 314, a mounting portion 326 which is perpendicular to the lens base 301 and to which the CCD 207 is mounted, an upper surface portion 318 which is continuous with the upper portion of the mounting portion 326 and extends at a right angle to the lens 206 side with respect to the mounting portion 326, Mounting portion 32 connected to the lower portion of the portion 326
6, a bottom surface portion 324 extending at a right angle to the lens 206 side
Are formed. Further, both ends 325 a and 325 b further protruding from the upper surface 318 toward the lens 206 are formed at both ends of the upper surface 318 of the CCD mounting plate 314. Further, the hole portions 3 are formed in the both end portions 325a and 325b.
16a and 316b (shown in FIG. 11 although hidden by screws 317a and 317b in FIG. 5) are formed.

Then, with the connection member 311 disposed inside the CCD mounting plate 314, the holes 316a and 316b of the CCD mounting plate 314 and the holes 313a, 313b and 327a and 327b of the connection member 311 are formed. By inserting screws 317a and 317b into each, CC
The D attachment plate 314 is attached to the connection member 311.

Further, both ends 312a of the connecting member 311 are
312b and both ends 325a, 3 of the CCD mounting plate 314.
The springs 315a and 315b, which are contracted with the screws 317a and 317b included therein, are attached between the springs 25b and 25b. By the springs 315a and 315b, both end portions 312a and 312b of the connection member 311 and
The distance between the CCD mounting plate 314 and both ends 325a and 325b is kept constant without any looseness. Also, screws 317
By tightening or loosening a and 317b, the distance between the both ends 312a and 312b of the connection member 311 and the both ends 325a and 325b of the CCD mounting plate 314 can be adjusted. That is, the CCD mounting plate 314 can be moved vertically (in the height direction) with respect to the lens base 301.

Further, as shown in FIG. 5, the CCD mounting plate 3
An opening 332 through which light passes is formed in the central portion of the mounting portion 326 of 14.

Further, as shown in FIGS. 3 to 5, the CC mounting plate 314 has a CC on the side opposite to the lens of the mounting portion 326.
The CCD 207 is mounted in the D spacer 323. A pair of holes (not shown) are formed in the CCD mounting plate 314, the CCD spacer 323, and the CCD 207. By inserting screws 334a and 334b into these holes, the CCD spacer 323 is attached to the mounting portion 326 of the CCD mounting plate 314. A CCD 207 is attached with the pin in between. The CCD 207 is attached to a position facing the opening 332 of the CCD attachment plate 314.

Further, as shown in FIGS. 5 and 9, a projection 502 is formed below the lens base 301. A spring 503 is suspended on the protrusion 502 and a part of the bottom surface 324 of the CCD mounting plate 314. As a result, the positional relationship between the lens base 301 and the CCD mounting plate 314 is kept constant.

Further, as shown in FIGS. 3 to 5, a light shielding cover 208 is provided between the lens 206 of the lens unit 204 and the lens mounting plate 314.

Here, the structure of the light shielding cover 208 will be described with reference to FIGS. 6 to 8. FIG. 6 is a perspective view of the light-shielding cover according to the above-described embodiment as seen from above, FIG. 7 is a perspective view of the light-shielding cover as described above as seen from below, and FIG. 8 is a light-shielding cover according to the above-described embodiment. It is a side view of a cover.

As can be seen from these figures, the light-shielding cover 208 has a main body A in which an optical path 601 through which light passes is formed, and the main body A is connected to the main body A and the optical path 6 extends from the main body A.
A pair of projecting portions B and C projecting along 01 are integrally formed.

The main body A of the light shielding cover 208 is provided with an upper surface portion 602 so as to cover the optical path 601. Further, side walls 603a and 603b are formed on both sides of the upper surface portion 602 at right angles to the upper surface portion 602 and so as to cover the side portions of the optical path 601.

Further, the upper surface portion 602 of the upper surface portion 602 of the light shielding cover 208 is provided on the end piece opposite to the protruding portions B and C.
A rear wall 612 formed at a right angle to 2 is continuous. Further, as shown in FIG. 7, in the middle of the rear wall 612,
An opening 613 is formed so that light passes through only the opening 613.

Further, as shown in FIGS. 6 to 8, an eaves portion 614 is formed on the upper portion of the rear wall 612 of the light shielding cover 208 so as to protrude rearward, that is, on the side opposite to the protrusions B and C. .

Further, above the protrusions B and C of the light shielding cover 208, the upper surface portion 602 of the light shielding cover 208 is connected,
A pair of protruding surfaces 604a, 604a protruding along the optical path 601.
04b is formed. Also, the protruding surfaces 604a, 60
Inside 4b, inner walls 605a and 605b are formed so as to be perpendicular to the projecting surfaces 604a and 604b and cover both sides of the optical path 601. Also, the protruding surface 6
04a and 604b, the protruding surfaces 604a and 60
4b, the tip walls 606a, 60 formed perpendicularly to 4b.
6b are in a row. Outside the protruding surfaces 604a and 604b, the outer wall 6 is perpendicular to the protruding surfaces 604a and 604b.
07a and 607b are connected.

As can be seen from FIG. 3, the protrusion B,
The distance between the inner walls 605a and 605b of C is larger than the diameter of the lens 206.

As can be seen from FIGS. 3 and 10, the side walls 603a and 603b, the inner walls 605a and 605b, the tip walls 606a and 606b, and the outer walls 607a and 607b have the same height, and the height of the lens 206 is the same. It is lower than that. That is, the height of the light shielding cover 208 is lower than that of the lens 206. In addition, the light shielding cover 20
The height of 8 is a height that does not obstruct the optical path passing through the lens 206.

Further, as shown in FIGS. 6 to 8, the outer wall 607 is provided on the outer walls 607a and 607b of the light shielding cover 208.
engagement pieces 608a and 608 protruding downward from a and 607b
b is formed. Also, the engaging pieces 608a, 608b
Pawls 609a and 609b protruding outward from the engaging pieces 608a and 608b are formed at the tip of the. Also,
Engaging pieces 6 of outer walls 607a and 607b of the light shielding cover 208
Notches 610a, 61 are provided on both sides of 08a, 608b.
0b, 611a, 611b are formed, and the engaging piece 608 is formed.
A and 608b are given elasticity. In this way, the light-shielding cover 208 has an engaging piece 608a which is a means for attaching the light-shielding cover 208 to the lens base 301.
608b and pawls 609a, 609b are outer walls 607
a and 607b are integrally formed.

Next, the attachment of the light shielding cover 208 to the lens unit 204 will be described.

First, as shown in FIG. 9, the light shielding cover 20
8 from the rear wall 612 to the upper surface portion 31 of the CCD mounting plate 314.
8 and the base portion 328 of the connecting member 311. Next, the pawls 609a and 609b of the light shielding cover 208
Are inserted into the square holes 335a and 335b provided on both sides behind the lens holding hole 306 in the lens base 301 of the lens unit 204 shown in FIG. In this way, the light blocking cover 208 is attached to the lens unit 204. 9 is a cross-sectional view of the lens unit according to the above embodiment.

The light-blocking cover 208 is attached to the lens unit 204.
Attached to the light-shielding cover 208 as shown in FIG.
Inner wall 6 of protrusions B and C protruding from the lens 206 side
05a, 605b, tip walls 606a, 606b, and outer walls 607a, 607b are located on opposite sides of the rear end of lens 206 and include inner walls 605a, 605b and outer wall 607.
a and 607b cover the side portion of the rear end of the lens 206.

Further, when the light shielding cover 208 is attached to the lens unit 204, a space is formed between the lens 206 and the main body portion A of the shielding cover 208, as shown in FIG.

Next, the light shielding of the light shielding cover 208 will be described with reference to FIGS. 9 and 10. FIG. 10 is a top view of the lens unit for explaining the light shielding of the light shielding cover according to the above embodiment.

The height of the light-shielding cover 208 is equal to that of the lens 206.
Although lower than the height of the light beam diameter formed on the image side,
The height is set so as not to interfere with the light flux incident on the CD 207. As a result, as shown in FIG. 9, the light incident on the lens 206 is condensed by the lens 206, enters the optical path 601 below the upper surface portion 602 of the light shielding cover 208, and reaches the CCD 207.

On the other hand, stray light 90 from above the lens 206
No. 1 is blocked by the upper surface 602 of the main body A of the light shielding cover 208 and does not directly enter the CCD 207 as light.

In this way, the height of the light shielding cover 208 is
Since the height of the light path that passes through the lens 206 is not obstructed, even if the height of the light shield cover 208 is lower than the height of the lens 206, the light shield cover 208 does not obstruct the light path, and thus the light shield cover 208. The lens 206 smoothly performs the function of
Can be moved.

The CCD 207 side of the upper surface portion 602 of the main body A of the light shielding cover 208 is the CCD mounting plate 31.
Since it is inserted in the lower inside of the upper surface portion 318 of No. 4, the upper surface portion 602 of the shielding cover 208 shields stray light from leaking from the CCD 207 side of the upper surface portion 602 of the light shielding cover 208 into the CCD 207.

In this way, the C with the CCD 207 attached
By inserting the CCD 207 side of the light shielding cover 208 below the upper surface portion 318 in which the upper side of the CD mounting plate 314 is bent to the lens 206 side, stray light entering between the light shielding cover 208 and the CCD 207 only by the structure of the light shielding cover 208. Can be shut off. As a result, it is possible to omit a sponge for blocking stray light that has been conventionally used, reduce the number of parts by that amount, and achieve low cost.

Further, on the CCD 207 side of the upper surface portion 602 of the main body A of the light shielding cover 208, the eaves portion 61 is provided.
4 exists, the eaves portion 614 forms the light shielding cover 208.
The stray light is surely shielded so that the stray light does not reach the CCD 207 from the CCD 207 side of the upper surface portion 602.

In this way, the CCD 2 of the light shielding cover 208 is
An eaves portion 61 protruding toward the CCD 207 on the upper side of the 07 side.
4 is provided, and this eaves portion 614 is attached to the CCD mounting plate 314.
Even when the CCD mounting plate 314 is moved back and forth and left and right during the magnification adjustment or the focus adjustment, the light blocking cover 208 and the CC are inserted below the bent upper surface portion 318.
Since the eaves portion 614 of the light shielding cover 208 is present between the D mounting plate 314 and the D mounting plate 314, it is possible to prevent a gap from being formed between the light shielding cover 208 and the CCD mounting plate 314 for magnification adjustment or focus adjustment. . As a result, it is possible to reliably prevent stray light from entering during that period and to deteriorate the reading accuracy.

Further, as shown in FIG. 10, the light shielding cover 2
08 does not cover the CCD 207 side of the lens 206 in the upper surface portion 602 of the main body portion A, but the outer walls 607a and 607b and the inner wall 605 of the protruding portions B and C of the shielding cover 208.
a and 605b cover both sides of the lens 206 on the CCD 207 side. Thus, the stray light 1001 entering from both sides of the lens 206 enters the inside through the notches 610a and 610b of the outer wall 607a, but is blocked by the inner walls 605a and 605b. Therefore, the shielding cover 208 prevents external light other than the output light of the lens 206 from entering the CCD 207, and prevents the reading accuracy from decreasing.

In this way, the lens 2 is protected by the light-shielding cover 208.
The upper surface of the CCD 06 on the CCD 207 side is not covered, but by covering both sides, stray light entering from both ends of the lens 206 is blocked, so that external light other than the output light of the lens 206 is prevented from entering the CCD 207, and the reading accuracy is degraded. Can be prevented. Further, by forming a portion of the light shielding cover 208 that covers both sides of the lens 206 into a double wall structure, the outer wall 607a, 609a and 609b for fixing the outer wall 607a,
Notches 610a, 610b, 6 provided in 607b
External light entering through the inner walls 605a, 605
It can be shielded by b. As a result, the fixing pawl 609a,
It is possible to prevent stray light from entering the CCD 207 even from a slight gap caused by the provision of the 609b, and prevent the reading accuracy from decreasing.

Next, positional adjustment of the lens 206 and the CCD 207 in the left-right direction and the height will be described with reference to FIG. FIG. 11 shows the lens according to the above embodiment and C
It is a figure for demonstrating the position adjustment of left-right and height with respect to CD.

In order to adjust the left and right positions of the lens 206 and the CCD 207, the screws 331a and 331b for attaching the connecting member 311 to the lens base 301 are loosened. Hole 32 into which screws 331a and 331b are inserted
Since the lengths of the CCDs 207 in the left-right direction of 9a and 329b are larger than the diameters of the screws 331a and 331b, the screws 331a and 331b have holes 329a and 329b.
You can move left and right inside. That is, the left and right positions of the lens 206 and the CCD 207 can be adjusted. Then, the left and right positions of the lens 206 and the CCD 207 are properly adjusted, and the screws 331a and 331b are tightened again. In this way, the left and right positions of the lens 206 and the CCD 207 are adjusted.

Further, the CCD 207 is attached to the lens 206.
In order to raise the position of the
Loosen the screws 317a and 317b attached to 11. Thereby, the CCD mounting portion 314 and the connecting member 311
The distance between and. As a result, C for the lens 206
The position of the CD 207 will be raised. Even in this case, since the springs 315a and 315b urge the CCD mounting plate 314 upward and the connecting member 311 downward, the distance between the CCD mounting portion 314 and the connecting member 311 is kept constant. Be drunk

Further, the CCD 207 is attached to the lens 206.
To lower the position of the connecting member 3 to the CCD mounting plate 314.
Tighten the screws 317a and 317b attached to 11. Thereby, the CCD mounting portion 314 and the connecting member 311
Will be closer to. As a result, the position of the CCD 207 is lowered with respect to the lens 206. Even in this case, the springs 315a and 315b are not connected to the CCD.
Since the mounting plate 314 is biased upward and the connection member 311 is biased downward, the gap between the CCD mounting portion 314 and the connection member 311 is kept constant.

Next, the adjustment of the distance between the lens 206 and the CCD 207 will be described with reference to FIG. 12
FIG. 6 is a diagram for explaining adjustment of the distance between the lens and the CCD according to the above embodiment.

When adjusting the distance between the lens 206 and the CCD 207, first loosen the screw 340 to remove the lens 20.
6 is allowed to move in the lens holding hole 306 along the direction of the CCD 207. Next, the exposed lens 206
The front end 1202 and the rear end 1203 of the are clamped by the jig 1201. Next, the jig 1201 is moved along the optical axis direction of the lens 206. Then, the lens 206 and the CCD 2
When the distance from 07 becomes an appropriate distance, the screw 340 is tightened for positioning.

The point to be noted here is that the upper surface of the lens 206 is not covered with the light shielding cover 208. As a result, the front end 1202 and the rear end 1203 of the lens 206 can be held by the jig 1201 with the light-shielding cover 208 still attached, and the lens 206 is held parallel to the moving direction of the lens 206 for smoothing. Can be moved to.

Next, focus adjustment and magnification adjustment of the reading device 101 will be described with reference to FIG. FIG.
FIG. 6 is a diagram for explaining focus adjustment and magnification adjustment of the reading device according to the above embodiment.

When the magnification of the reading device 101 is adjusted, the lens unit 204 is attached to the lens mounting plate 205 shown in FIG. 2, and the positional relationship between the original surface of the original placed on the reading device and the lens unit 204. Adjust. Specifically, by moving the rack 209 of the lens unit 204 along the scale 210 of the lens mounting plate 205,
The lens unit 204 is moved back and forth with respect to the document surface. In this way, the magnification of the reading device 101 is adjusted.

When adjusting the focus of the reading device 101, after the magnification adjustment is completed with the lens unit 204 incorporated in the reading device 101, the jig 1 is read as described above.
By adjusting the distance between the lens 206 and the CCD 207 using 201, the distance between the lens 206 and the image plane of the CCD 207 is adjusted. In this way, the focus adjustment of the reading device 101 is performed.

As described above, according to the above embodiment, the height of the light shielding cover 208 is made lower than the height of the lens 206, so that the upper surface of the lens 206 can be prevented from being covered by the light shielding cover 208. This allows
With the light shield cover 208 still attached, the lens 2
06 can be held between the front end and the rear end, and the lens 206 can be held in parallel with the moving direction of the lens 206 and moved smoothly. As a result, the focus adjustment can be performed without using a complicated jig with the light shielding cover 208 attached, and the reading accuracy can be improved. Further, since it is not necessary to design the height of the reading device 101 based on the height of the lens 206 or higher, the size of the device can be reduced accordingly.

In the above embodiment, the reading device 1 is used.
Although 01 has been described as being mounted on the copying machine 100, the reading device 101 may be mounted on a multifunction machine having a facsimile function, a copying function, a printer function, and the like.

[0110]

As described above, according to the present invention,
Even when the light shielding cover 208 is attached, the front end 1202 and the rear end 1203 of the lens 206 are exposed, so that the lens 206 can be moved smoothly and focus adjustment can be performed without using a complicated jig. .

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a copying machine equipped with a reading device according to an embodiment of the present invention.

FIG. 2 is a top view of the reading device according to the above embodiment.

FIG. 3 is a perspective view of the lens unit according to the above embodiment.

FIG. 4 is a top view of the lens unit according to the above embodiment.

FIG. 5 is a perspective view showing a state in which a lens and a light shielding cover are removed from the lens unit according to the above embodiment.

FIG. 6 is a perspective view of the light-shielding cover according to the above embodiment as seen from above.

FIG. 7 is a perspective view of the light-shielding cover according to the above embodiment as seen from below.

FIG. 8 is a side view of the light shielding cover according to the above embodiment.

FIG. 9 is a sectional view of the lens unit according to the above embodiment.

FIG. 10 is a top view of a lens unit for explaining light shielding of the light shielding cover according to the above embodiment.

FIG. 11 is a diagram for explaining left / right and height position adjustment between the lens and the CCD according to the above embodiment.

FIG. 12 is a diagram for explaining adjustment of the distance between the lens and the CCD according to the above embodiment.

FIG. 13 is a diagram for explaining focus adjustment and magnification adjustment of the reading device according to the above embodiment.

FIG. 14 is a perspective view of a conventional lens unit having a light-shielding cover and an adjuster for adjusting the position of the lens.

FIG. 15 is a sectional view of a conventional lens unit.

FIG. 16 is a top view of a conventional lens unit.

[Explanation of symbols] 100 copiers 101 reader 204 lens unit 205 lens mounting plate 206 lens 207 CCD 208 shade cover 209 racks 301 lens base 306 lens holding hole 307 Lens holding spring 311 Connection member 314 CCD mounting plate 318 Top surface 323 CCD spacer 326 mounting part 328 Base 332 opening 601 optical path 602 upper surface 603a, 603b Side wall 604a, 604b Projecting surface 605a, 605b inner wall 607a, 607b outer wall 608a, 608b Engagement piece 609a, 609b claws 610a, 610b, 611a, 611b Notch 612 rear wall 614 eaves 1201 jig

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H108 AA01 HA07 JA11                 5C051 AA01 BA03 DB01 DB22 DC07                       DE22 FA01                 5C072 AA01 DA02 DA15 DA23 FB06                       LA02 RA12 XA01

Claims (12)

[Claims] 1. A lens for collecting reflected light from a document,
A photoelectric conversion unit that converts the output light from the lens into an electric signal, and external light other than the output light from the lens that is arranged between the lens and the photoelectric conversion unit enters the photoelectric conversion unit. And a light-blocking cover for blocking the light-shielding cover, the height of the light-blocking cover is lower than the height of the lens and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side. A reading device characterized by the above. 2. The light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covering portion has a double wall structure, and a groove provided on an outer wall for a pawl for fixing. The reading device according to claim 1, wherein an inner wall shields external light entering from the inside. 3. A photoelectric conversion means mounting plate for mounting the photoelectric conversion means, wherein the photoelectric conversion means mounting plate has its upper side bent toward the lens, and the photoelectric conversion means side of the light-shielding cover is the photoelectric conversion means mounting plate. The reader according to claim 1 or 2, wherein the reader is inserted and fixed below a bent portion of the. 4. A photoelectric conversion means mounting plate for mounting the photoelectric conversion means is provided, the photoelectric conversion means mounting plate having its upper side bent to the lens side, and the photoelectric conversion means side of the light-shielding cover has the photoelectric conversion means on its upper side. The reading device according to claim 1 or 2, wherein an eaves portion protruding to the side is provided, and the eaves portion is inserted and fixed below a bent portion of the photoelectric conversion means mounting plate. 5. A lens for collecting reflected light from the original,
A photoelectric conversion unit that converts the output light from the lens into an electric signal, and external light other than the output light from the lens that is arranged between the lens and the photoelectric conversion unit enters the photoelectric conversion unit. And a light-blocking cover for blocking the light-shielding cover, the height of the light-blocking cover is lower than the height of the lens and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side. A copying machine characterized by that. 6. The light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covering portion has a double wall structure, and a groove provided on an outer wall for a pawl for fixing. 6. The copying machine according to claim 5, wherein the inner wall shields external light entering from the inside. 7. A photoelectric conversion means mounting plate for mounting photoelectric conversion means is provided, wherein the photoelectric conversion means mounting plate has its upper side bent toward the lens, and the photoelectric conversion means side of the light-shielding cover is the photoelectric conversion means mounting plate. The copying machine according to claim 5 or 6, wherein the copying machine is fixed by being inserted below the bent portion of the. 8. A photoelectric conversion means mounting plate for mounting photoelectric conversion means, wherein the photoelectric conversion means mounting plate has its upper side bent to the lens side, and the photoelectric conversion means side of the light-shielding cover has its photoelectric conversion means on its upper side. 7. The copying machine according to claim 5, wherein a protruding portion is provided on the side, and the protruding portion is inserted and fixed below the bent portion of the photoelectric conversion means mounting plate. 9. A lens for collecting reflected light from a document,
A photoelectric conversion unit that converts the output light from the lens into an electric signal, and external light other than the output light from the lens, which is arranged between the lens and the photoelectric conversion unit, enters the photoelectric conversion unit. And a light-shielding cover for blocking the light-shielding cover, the height of the light-shielding cover is lower than the height of the lens and does not obstruct the optical path passing through the lens, and does not cover the upper surface of the lens on the photoelectric conversion means side. This is a multi-function device. 10. The light-shielding cover covers both sides of the lens on the photoelectric conversion means side, and the covered portion has a double wall structure, and a groove provided on an outer wall for a pawl for fixing. 10. The multi-function peripheral according to claim 9, wherein the inner wall shields external light entering from the inside. 11. A photoelectric conversion means mounting plate for mounting photoelectric conversion means, wherein the photoelectric conversion means mounting plate has its upper side bent toward the lens, and the photoelectric conversion means side of the light-shielding cover is the photoelectric conversion means mounting plate. 11. The multifunction machine according to claim 9 or 10, wherein the multifunction machine is inserted and fixed below a bent portion of the. 12. A photoelectric conversion means mounting plate for mounting photoelectric conversion means, wherein the photoelectric conversion means mounting plate has its upper side bent to the lens side, and the photoelectric conversion means side of the light-shielding cover has its upper side photoelectric conversion means. 10. An eaves portion projecting to the side is provided, and the eaves portion is inserted and fixed below a bent portion of the photoelectric conversion means mounting plate.
Alternatively, the multi-function peripheral according to claim 10.