JPH08228264A - Original positioning method and image input device - Google Patents

Abstract

PURPOSE: To easily reproduce a read position and an angle by setting an original once more even when the original is once removed from the reader. CONSTITUTION: The image input device is provided with a lighting means lighting an original, a photoelectric conversion means reading the image of the lighted original, an original support means 60 supporting the original, and a placing means 47 on which the original support means 60 is mounted. Then the original support means 60 has a positioning hole 67 (or positioning shaft), a 1st side wall, the placing means 47 has an engagement shaft 100 (or engagement hole) engaging with the positioning hole 67, and energizing means 97, 98 in press contact with the 1st side wall and energizing the original support means 60 in a direction of the engagement position between the positioning hole 67 (or positioning shaft) and the engagement shaft 100 (or engagement hole). The original is positioned by the engagement between the positioning hole 67 (or positioning shaft) and the engagement shaft 100 (or engagement hole) and the energizing of the energizing means 97, 98 to the 1st side wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image input device for reading an image of a reflective original or a transparent original.

[0002]

2. Description of the Related Art As a conventional example of this type of image input device, the structure of a so-called 35 mm slide film scanner is shown in FIGS. In these figures, a film 1 as a transparent original is held by a mount portion 3 of a slide 2.

The slide 1 is detachably held on a holder 5 provided on the stage 4, and the stage 4 is driven by a stage drive mechanism. The stage drive mechanism includes a lead screw 6, a stage motor 7, a guide bar 8 and a guide member 9. Lead screw 6 is stage 4
It is screwed to. The stage motor 7 is for rotating the lead screw 6. The guide bar 8 engages with the guide member 9 and guides the horizontal movement of the stage 4.

The film 1 is a light source 1 such as a halogen lamp.
It is irradiated by the light flux emitted from the heat ray absorption filter 12, the diffusion plate 13, the color filter 14, and the condenser lens 15 from 1. The transmitted light that has passed through the film 1 has its optical axis bent in the vertical direction by the mirror 16 and the lens 17
An image is formed on the CCD 18, which is a line-type image sensor. In this way, the image on film 1 is CCD1
8 read. The CCD 18 photoelectrically converts the image and outputs the image signal to an image processing unit (not shown).

The color filter 14 has three colors of red, blue and green.
A color filter is provided, and a color image is input by alternately irradiating the same image. The lens 17 and the CCD 18, which is a line-type image sensor, are fixed and held on the image-forming-portion support member 21 at regular intervals. Further, the image forming unit support member 21 is driven by the focusing drive mechanism.

The focusing drive mechanism comprises a lead screw 22, a focusing motor 23, a guide bar (not shown) and a guide member (not shown). The lead screw 22 is screwed onto the imaging unit support member 21. Focusing motor 23
Is for rotating the lead screw 22. The guide bar (not shown) engages with the guide member (not shown),
It is for guiding the lens 17 and the CCD 18 in the optical axis direction.

In the image processing unit (not shown), in addition to image input processing, processing such as automatically performing the focusing operation while driving the focusing driving mechanism to perform contrast calculation is performed. The case 24 serving as a storage means has a recess 24 a forming a moving space of the stage 4, and a recess 2
Projections 24b and 24c are formed on both sides of 4a, respectively. The light source 11, the heat absorption filter 12, the diffusion plate 13, the color filter 14, the condenser lens 15, and other illumination units and the power supply 25 are housed in the one convex portion 24b. The other convex portion 24c has a mirror 16 and a lens 1.
An image forming unit such as 7 and CCD 18, and a drive mechanism of the stage 4 are housed.

The recess cover 30 can be manually moved,
It is opened when the slide 2 is set on the stage 4, and closed when the image is read. FIG. 10 shows the recess cover 3
0 shows a closed state and FIG. 11 shows an open state. Convex part 2
On the side surface of 4b, an air intake hole 26 as an air suction means is provided at a side surface position of the condenser lens 15.
An exhaust fan 27 is provided near the light source 11 on the convex portion 24b as an air exhaust unit. The exhaust fan 27 discharges the heat generated from the light source 11 and the power supply 25 to the outside of the case 24.

When reading an image, the reading range is specified on the host computer. The amount of light and the accumulation time of the CCD are adjusted according to the density of the original,
During that time, the setting of the reading range is stored.

[0010]

In the image input device constructed as described above, once the image original is removed from the holder, the same image original is set to read the same portion of the same original. , There is no reproducibility of position. Therefore, it takes time for the user to rotate the image original by a small angle to set the screen position and reset the reading range on the monitor of the host computer.

The present invention has been made in view of the above problems, and an original document positioning method in which the original document can be easily removed from the reading device and then set again to easily reproduce the reading position and angle. The purpose is to provide.

[0012]

In order to achieve the above object, the invention according to claim 1 illuminates a document 1 and a photoelectric conversion unit 18 for reading an image of the illuminated document 1. In the image input device having the document holding means 60 for holding the document 1 and the placing means 47 for placing the document holding means 60, the document holding means 60 has the positioning hole 67.
(Or a positioning shaft) and a first side wall 74, and the mounting means 47 contacts the positioning shaft 67 (or an engagement hole) and the first side wall 74 and contacts the positioning hole 67.
(Or a positioning shaft) and biasing means 97 and 98 for biasing the document holding means 60 toward the engagement position of the engagement shaft 100 (or the engagement hole), and the positioning hole 67 (or the positioning shaft). The original 1 is positioned by the engagement of the engaging shaft 100 (or the engaging hole) and the biasing means 97 and 98 to the first side wall 74.

According to the second aspect of the invention, in contrast to the first aspect of the invention, the document holding means 60 further has a second side wall 75 substantially perpendicular to the first side wall 74, and the placing means 47 is biased. A side wall 93 substantially parallel to the biasing direction of the means 97, 98, and engaging and biasing means 97 between the positioning hole 67 (or positioning shaft) and the engaging shaft 100 (or engaging hole);
The original is positioned by the urging of 98 to the first side wall 74 and the contact between the second side wall 75 and the side wall 93 of the mounting means 47.

[0014]

In the invention according to claim 1, the positioning hole 6
7 (or positioning shaft) and the engagement shaft 100 (or engagement hole) for engaging and urging means 97, 98 with the first side wall 74.
Since the document 1 is positioned by urging the document, the urging means 97 and 98 can be reliably positioned in the urging direction, and even if the document is once removed from the reading device, it is set again. The reading position and angle can be easily reproduced.

According to the second aspect of the present invention, the first side wall 7 of the engagement and biasing means 97, 98 between the positioning hole 67 (or the positioning shaft) and the engagement shaft 100 (or the engagement hole).
4, and the second side wall 75 and the side wall 93 of the mounting means 47.
Since the original is positioned by abutting with the contact, the positioning of the urging means 97 and 98 in the urging direction and the direction substantially perpendicular to the urging direction can be surely performed, and the original is once read from the reading device. Even if you remove it, by setting it again,
The reading position and angle can be easily reproduced.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the image input device of the present invention will be described below with reference to the drawings. In the following figures, FIG.
Also, the portions corresponding to those of the conventional example shown in FIG. 11 are denoted by the same reference numerals, and the description thereof will be appropriately omitted. FIG. 1 is a vertical sectional view for explaining a first embodiment of an image input device according to the present invention.

FIG. 2 is a perspective view for explaining the first embodiment of the image input apparatus according to the present invention, and shows a document holder. FIG. 3 is a plan view of a document holder used in the first embodiment of the image input device according to the present invention. FIG. 4 is a perspective view for explaining a method of using the document holder used in the first embodiment of the image input device according to the present invention.

FIG. 5 is a perspective view for explaining the first embodiment of the image input apparatus according to the present invention, and shows the main part of the stage. FIG. 6 is a vertical sectional view for explaining the first embodiment of the image input apparatus according to the present invention, and shows a state in which the document holder is positioned on the stage. First, the image input device of the first embodiment will be described.

In FIG. 1, the case 31 is formed in a box shape, and an insertion opening 32 for inserting and removing the film holder 60 is provided on one front surface of the case 31. A door 34 that rotates around a shaft 33 is attached to the insertion port 32. The inside of the case 31 is composed of almost three layers. The three layers are composed of an illumination unit 35, a document scanning unit 36, and an image forming unit 37 in this order from the top.

The illumination section 35 is a light source 11 such as a halogen lamp arranged on the right side in FIG. 1, a heat absorption filter 12, a diffusion plate 13, a color filter 14, and a first condenser lens 4.
1, a first mirror 42, a second mirror 43, a third mirror 44, a second condenser lens 45, and the like. The light emitted from the light source 11 has its optical paths bent vertically by the first, second, and third mirrors, and irradiates the surface of the film 1 in the vertical direction. Therefore, since the optical path is folded and arranged parallel to the surface of the film 1,
The illumination unit 35 has a thin structure.

The original scanning unit 36 is composed of a film holder 60, a stage 47, and a drive mechanism including the lead screw 6 and the stage motor 7. The lead screw 6 and the stage 47 are arranged substantially parallel to the illumination optical path from the light source 11 to the first mirror. The image forming unit 37 includes a mirror 46, a lens 17, a CCD 18, and the like. The mirror 46 is arranged so that the optical path reflected by the mirror 46 is substantially parallel to the illumination optical path from the light source 11 to the first mirror. Since the image of the film 1 is read by the line type CCD 18, the illumination area on the film 1 may be a linear shape corresponding to the CCD 18.
That is, since the Fresnel type condenser lenses 41 and 45 and the mirrors 42, 43 and 44 which form the illumination unit 35 may be linear, the optical path of the illumination optical system can be arranged by folding as described above. Therefore, the illumination unit 35 can be made thin.

On the lower left side of the case 31 in FIG. 1,
An air intake hole (not shown) is formed at a position facing the CCD 18. An exhaust fan 27 is provided on the upper right side of the case 31 in FIG. Next, the image reading operation and the insertion / ejection of the film holder 60 will be described.

When the film holder 60 is not inserted, the stage 47 of the main body of the image input apparatus is at the standby position for inserting the film holder 60. The insertion standby position means that the stage 47 is at the position shown in FIG. 6 with respect to the fixing member 104. In this embodiment, when the stage 47 is in the insertion standby position, the arm portion 99a of the seesaw member 99 is
The distance between the fixing member 104 and the fixing member 104 is 1.5 mm.

After setting the film 1 in the film holder 60, the film holder 60 is inserted through the insertion opening 32,
It is fixed on the stage 47. The door 34 attached to the insertion opening 32 is interlocked counterclockwise in the drawing as the film holder 60 is inserted behind the stage. When the loading operation of the film holder 60 is completed, the stage 47
Moves to the reading start position and the door 34 is closed. Although details of the closing operation of the door are not shown, the opening and closing can be realized by using an appropriate force such as the use of gravity, a coil spring, a torsion spring, a leaf spring, an electromagnetic force of a solenoid or a motor.

The stage 47 is driven by a driving mechanism to move backward, and sub-scanning for reading an image on the film 1 is performed. On the other hand, the light source 11 is turned on and the lighting unit 3
5, the reading position of the film 1 is illuminated. The light transmitted through the image on the film 1 is reflected by the mirror 46 and the lens 1.
An image is formed on the CCD 18 via 7. And CCD1
8 reads an image of one line. By repeating this reading operation in the main scanning direction while sequentially moving in the sub-scanning direction, that is, the moving direction of the film 1, 2
An image of the film 1 can be input dimensionally.

In this way, the CCD 18 reads the image on the film 1, photoelectrically converts it, and outputs the image signal to an image processing section (not shown). In addition, the color filter 14 is red,
Filters of three colors of blue and green are provided, and a color image can be input by alternately irradiating the same image. The lens 17 and the CCD 18 are fixed and held on the imaging unit support member 21 at a constant interval. Further, the image forming unit support member 21 is driven by the focusing drive mechanism.

The focusing drive mechanism comprises a lead screw 22, a focusing motor 23, a guide bar (not shown) and a guide member (not shown). The lead screw 22 is screwed onto the imaging unit support member 21. Focusing motor 23
Is for rotating the lead screw 22. The guide bar (not shown) engages with the guide member (not shown),
It is for guiding the lens 17 and the CCD 18 in the optical axis direction.

In the image processing unit (not shown), in addition to image input processing, processing such as automatically performing a focusing operation while driving a focusing driving mechanism to perform contrast calculation is performed. During operation of the above image input device, heat is generated by driving the stage motor 7, turning on the light source 11, and the power supply 25 for driving the circuit. However, outside air is sucked in from an air intake hole (not shown) arranged near the CCD 18 below the case 31. Further case 31
After absorbing the heat generated from the stage motor 7, the light source 11, the power source 25, and the like, the exhaust fan 27 discharges the heat to the outside. Therefore, it is possible to prevent the ambient temperature of the CCD 18 from rising.

The discharging operation of the film holder 60 is performed by moving the stage 47 in the forward direction. When the stage 47 moves forward and reaches the insertion standby position, the rear end of the film holder pushes the door 34 outward. Further, the film holder 60 is released from the stage 47 and moved in the discharge direction. The rear end of the film holder 60 is exposed to the outside of the insertion opening 32. Therefore, the user can take out the film holder 60.

When the film holder 60 is pulled out, the door 34 is driven by gravity or the like to close. Next, details of the film holder 60 will be described with reference to FIGS. 2, 3, and 4. The film holder 60 is composed of a frame 61 forming its outer shape and a turntable 62 rotatably held in the center of the frame 61. The frame and turntable are made of resin.

The film holder 60 is formed in a rectangular thin plate shape having a right cutout portion 63 and a left cutout portion 64 at the front end in the insertion direction. The right cutout portion 63 and the left cutout portion 64 have an asymmetrical shape. As shown in FIG. 2, the right cutout 63 has a front side wall 74a. Further, the left cutout portion 64 has a front side wall 74b. There is a right side wall 75a on the right side of the frame 61, and a left side wall 7 on the left side.
There is 5b. A groove portion 65 is provided on the upper rear portion of the frame 61 to facilitate insertion and removal operations. A slope 66, a positioning hole 67, and a convex-shaped sliding portion 68 are provided on the left and right sides of the front portion, following the cutout portion. As shown in FIG. 3, a plurality of claws 69 are formed around the turntable 62. The turntable 62 is rotatably held on the frame 61,
Even if it is upside down, it will not come off. Turntable 6
The lower surface of 2 has an opening (not shown).

An angle indicator 7 is provided on the outer circumference of the turntable 62.
1, the frame 61 is provided with an angle scale 72. A grid scale 73 is provided around the turntable 62. The slide portions 68 at the positions corresponding to the left and right of the turntable 62 are formed in a staircase shape and have a scale similar to the grid scale 73. Turntable 62
An opening (not shown) is formed at the bottom of the glass plate, a glass plate 80 is fixed to the upper surface of the opening, and a mask 81 corresponding to the size of the film 1 is attached. The mask 81 is positioned by the shaft 82 and can be replaced according to the size of the film 1.

A hinge 83 is provided at one end of the turntable 62.
A glass plate 85 is openably and closably supported via the frame member 84. At the other end of the turntable 62, a pressing portion 86 for locking the tip portion 84a of the frame member 84 is provided. In order to load the film 1 into the film holder 60, first, as shown in FIG. 4, the pressing portion 86 of the film holder 60 is displaced to move the tip portion 84 of the frame member 84.
Open a. The mask 81 on the glass plate 80 is replaced with a mask corresponding to the size of the film 1, and the film 1 is placed in alignment with the alignment portion 87 of the mask 81. The frame member 84 integrated with the glass plate 85 is closed and fixed by the pressing portion 86. The film 1 is two glass plates 8 on the mask 81.
It is sandwiched between 0 and 85 and held, and flatness is maintained. The film 1 as the transparent original is sandwiched between the glass plates 80 and 85 and can be observed in the frame member 84 and the opening (not shown), and can be read by the scanner as the image input device.

The mask 81 is for suppressing the influence of light from a portion without an image so as to obtain good reading data without so-called fog. If the mask 81 is not used, the alignment portion 87 cannot be used, but the film 1
The position and angle can be determined by using the grid and angle scale of the frame 61.

Next, details around the stage 47 will be described with reference to FIGS. A stage 47 guided by a guide bar 91 is movably supported behind the door 34 having the shaft 33 as a rotation axis. The drive unit is not shown in FIGS. 5 and 6. An opening 92 corresponding to the reading range of the film is provided at the center of the stage 47. Stage 47
A pair of side walls 93 having a tapered portion 93a is provided on the left and right sides. When the film holder 60 is attached to the stage 47, the side wall 93 of the stage 47 contacts the side wall 75 of the film holder 60. By this contact, the film holder 60 is positioned with respect to the stage 47 in a direction substantially perpendicular to the insertion direction.

A leaf spring 94 is located slightly above and in front of the side wall portion 93.
Is provided as a set. The leaf spring 94 is for urging the film holder toward the stage 47. A pair of return members 98, which are guided by the shaft 95 and the elongated hole 96 and are urged by the tension springs 97, are provided at the slightly rear side. Return member 9
The arm portions 8 a and 98 c of the side wall 8 project inside the side wall 93. The arms 98a and 98c are arranged at positions where they come into contact with the front side wall 74 in front of the film holder 60 when the film holder 60 is inserted.

A seesaw member 99 is installed on the rear side. A positioning shaft 100 is provided at the front end of the seesaw member 99.
Is attached. An arm portion 99a is attached above the center of the seesaw member 99. Seesaw member 9
9, the positioning shaft 100 is urged downward by a spring behind the shaft 9 as a rotation shaft.

A rail portion 101, whose height from the guide bar is accurately controlled, is formed at a portion of the stage 47 facing the positioning shaft 100 and the leaf spring 94. The parts other than the rail part 101 on the upper surface of the stage 47 are
It is lower than the rail portion 101 and is configured so as not to come into contact with the film holder 60. A protrusion 102 is formed inside the seesaw member 99 on the left rear side of the stage. Female screw 1 in the sub scanning direction at the center of the rear of the stage
03 is formed.

The right return member 98 has a light reflecting portion 98b formed outside the stage 47. The set of fixing members 104 is fixed to the image input apparatus main body independently of the stage 47. The fixing member 104 is arranged so as to drive the arm portion 99a of the seesaw member 99 when the stage 47 moves forward of the film holder insertion standby position.

The reflective photoelectric sensor 105 is fixed independently of the stage 47. The reflective photoelectric sensor 105 is
When the film holder 60 is inserted into the stage 47 at the film holder insertion standby position, the right side return member 98
This is for detecting the light reflection portion 98b. A male screw 106 is rotatably supported on the back surface of the case. The male screw 106 and the female screw 103 of the stage 47 are arranged so that their axes match. In the moving range of the stage 47 during reading, the male screw 106 and the female screw 103 are located apart from each other,
Do not screw. When the stage 47 is moved further rearward of the reading range, the male screw 106 can be screwed into the female screw 103 of the stage 47 to fix the stage 47 to the case 31. Since the vibration during transportation does not adversely affect the guide part of the stage 47, good reading is possible.

Next, the situation in which the film holder 60 is positioned and held on the stage 47 of the image input device will be described with reference to FIGS. When the film holder 60 is manually inserted into the stage 47 at the insertion standby position, the sliding portion 68 is first urged by the leaf spring 94. Next, the slope 66 advances while lifting the positioning shaft 100. Then, the positioning shaft 100 falls into the positioning hole 67. During this time, the film holder 60 receives a force to be pushed back to the front of the stage by the arm portion 98a of the returning member 98. When the hand is released, the force to be pushed back causes the positioning shaft 100 to move.
The position is determined between the step 107 and the positioning hole 67, and the film holder 60 is locked on the stage 47 as shown in FIG.

The positioning hole 67 is an elongated hole.
Therefore, even after the film holder 60 is inserted and the engagement between the positioning shaft 100 and the positioning hole 67 is completed, there is room to move the film holder 60 further in the back. The movement of the film holder 60 after reaching this engagement state,
The reflective photoelectric sensor 105 detects the reflection of the reflecting portion 98b. By doing so, the completion of loading the film holder 60 can be confirmed. When it is detected that the film holder 60 is loaded on the stage 47 at the insertion standby position, the stage 47 is moved to the readable position of the film 1.

The shape of the space on the rear side of the stage 47 is left-right asymmetrical like the film holder 60 due to the protrusion 102 on the left back side. Therefore, for example, even if it is accidentally inserted inside out, it is not locked on the stage 47. The film holder 60 is pressed downward with respect to the stage 47 by the leaf spring 94 at the rear end of the sliding portion 68 and the step 107 of the seesaw member 99 at the front end. Both upper and lower surfaces of these pressing portions of the film holder 60 are projected more than other areas, and the vertical position is determined on the dimension-controlled rail portion 101 on the bottom surface of the stage. As a result of the above, the parallelism between the film 1 and the stage 47 is secured. Further, the film holder 60 is placed on the stage 47 with a uniform force so as to surround the center of the screen of the film holder.
Is supported.

Next, the situation where the film holder 60 is opened and discharged from the stage 47 of the image input device will be described.
When the stage 47 is at the insertion standby position, the arm portion 99a of the seesaw member 99 is at a position separated from the fixing member 104 by 1.5 mm. When the stage 47 is moved from the insertion standby position to the ejection side, the fixing member 104 contacts the arm portion 99a of the seesaw member 99. When the stage 47 further moves, the fixing member 104 pushes the arm portion 99a to the rear side of the stage, causing the seesaw member 99 to move clockwise in FIG. That is, the seesaw member 99 rotates in the direction in which the positioning shaft 100 is released from the positioning hole 67. When the stage 47 moves from the insertion standby position to the ejection side by 5 mm, the positioning shaft 100 is released from the positioning hole 67. Then, since the film holder 60 is pushed back by the arm portion 98a of the returning member 98, the rear end thereof is inserted into the insertion opening 32.
Can be extracted from

The image read by the image input device can be checked on a monitor via a computer or the like, and the deviation of the image from a predetermined angle can be calculated. By ejecting the film holder 60 from the image input device and rotating the turntable 62 with reference to the angle index 71 and the angle scale 72, the orientation of the image can be adjusted. If the film holder 60 is again inserted into the image input device and the reading operation is performed, the image data of the desired angle can be obtained.

Once the film 1 is set in the film holder 60, the position and orientation of the original document are uniquely determined by the positional relationship between the film holder 60 and the stage 47. Therefore, the position and orientation of the document can be easily reproduced even if the film 1 is repeatedly taken in and out from the image input device. Prepare multiple originals that have been set and memorize detailed conditions for reading such as film type such as negative and positive, reading range, reading resolution, exposure amount (accumulation time of CCD), and collectively. To read images (called batch processing)
There are cases. Even in such a case, it is convenient because the position and orientation are reproduced in the state when the conditions are set in advance.

The image input device and the film holder 60 which handle the film 1 as the transparent original have been described so far, but it goes without saying that the invention can be applied to a reflective original. Next, a second embodiment will be described. FIG. 7 is a perspective view illustrating a second embodiment of the image input device according to the present invention, showing a stage section.

FIG. 8 is a perspective view for explaining the second embodiment of the image input apparatus according to the present invention, showing a document holder. In the first embodiment, two sets of positioning shaft 100 and positioning hole 67 are provided.
The posture is determined by the return member 98 and the front side wall 74. In the second embodiment, the right positioning shaft 100, the positioning hole 67, the returning member 98, the front side wall 74, the left returning member 98c and the front side wall 74b are left. A leaf spring 110 is arranged on the left rear side. The moment generated by the return member 98c on the left side of FIG. 7 is regulated by the right side wall 93b, and the attitude of the film holder 60 is uniquely determined. Therefore, if there is at least one side wall, the position of the film holder 60 on the surface of the stage 47 can be determined.

In the second embodiment, since the seesaw member 99 is one, the structure is inexpensive. Next, a third embodiment will be described. FIG. 9 is a diagram for explaining the third embodiment, and the image input apparatus main body and the stage are the same as those of the first embodiment. The difference from the first embodiment is the film holder 60 for setting the slide film.
Is. The frame 61 and the turntable 62 of the film holder 60 are the same. The difference is that instead of two glass plates or frame members, an opening 120 is attached at the center and a tray 122 around which a leaf spring 121 is attached is attached. A recess is formed around the opening 120. The original to be read is the slide film 1 held by the mount unit 3, and the mount unit 3 is attached to the leaf spring 12
1 and the tray 122 to insert the screen into the opening 120
Correspond to. By doing so, the slide document is held by the film holder 60.

Film holder 60 for stage 47
The positioning of is similar to that described in the first embodiment.
Therefore, even with the slide film, the reading range can be reproduced even after the film is once taken out from the image input device, or even during batch processing. Therefore, it is possible to reproduce the reading range as before without any trouble.

In the above-described embodiment, the positioning shaft 100 is attached to the seesaw member 99 of the stage 47, and the positioning hole 67 is provided on the film holder 60 side.
Instead, a positioning shaft may be provided on the film holder 60 side and a positioning hole may be provided on the seesaw member 99 of the stage 47.

[0052]

According to the first aspect of the present invention, the document is provided by engaging the positioning hole (or the positioning shaft) with the engaging shaft (or the engaging hole) and urging the urging means to the first side wall. Since the positioning of No. 1 is made, the positioning of the biasing means in the biasing direction can be surely performed, and even if the document is once removed from the reading device, it can be set again by easily setting the reading position and angle. You can

In the second aspect of the invention, the engagement between the positioning hole (or the positioning shaft) and the engagement shaft (or the engagement hole) and the biasing of the biasing means to the first side wall and the second side wall. Since the document is positioned by abutting the side wall of the placing means with that of the placing means, the biasing direction of the biasing means and the direction substantially perpendicular to the biasing direction can be surely positioned, and the document is read. Even if you remove it from the device, you can easily reproduce the reading position and angle by setting it again.

[Brief description of drawings]

FIG. 1 is a vertical sectional view illustrating a first embodiment of an image input device according to the present invention.

FIG. 2 is a perspective view illustrating a first embodiment of an image input device according to the present invention, showing a document holder.

FIG. 3 is a plan view of a document holder used in the first embodiment of the image input apparatus according to the present invention.

FIG. 4 is a perspective view for explaining a method of using a document holder used in the first embodiment of the image input device according to the present invention.

FIG. 5 is a perspective view illustrating a first embodiment of the image input device according to the present invention, and shows a main part of a stage drive mechanism.

FIG. 6 is a vertical sectional view for explaining the first embodiment of the image input apparatus according to the present invention, showing a state in which the original holder is positioned on the stage.

FIG. 7 is a perspective view illustrating a second embodiment of the image input device according to the present invention, showing a stage unit.

FIG. 8 is a perspective view illustrating a second embodiment of the image input apparatus according to the present invention, showing a document holder.

FIG. 9 is a perspective view illustrating a third embodiment of the image input apparatus according to the present invention, showing a document holder.

FIG. 10 is a cross-sectional view showing an internal schematic configuration of an example of a conventional image input device.

FIG. 11 is an external perspective view of an example of a conventional image input device.

[Explanation of symbols]

 1 film (original) 2 slide 3 mount part 4 stage 5 holder 6 lead screw 7 stage motor 8 guide bar 11 light source 12 heat absorption filter 13 diffuser plate 14 color filter 15 condenser lens 16 mirror 17 lens 18 CCD 21 coupling part indicating member 22 Lead screw 23 Focusing motor 24 Case 25 Power supply 26 Air intake 27 Exhaust fan 30 Recessed cover 31 Case 32 Insertion port 33 Shaft 34 Door 35 Illumination unit 36 Original scanning unit 37 Imaging unit 41 First condenser lens 42 First Mirror 43 Second mirror 44 Third mirror 45 Second condenser lens 46 Mirror 47 Stage 60 Film holder 61 Frame 62 Turntable 63 Right notch 64 Left notch 65 Groove 66 Slope 67 Positioning Hole 68 Sliding part 69 Claw part 71 Angle index 72 Angle scale 73 Grid scale 74 Front side wall 75 Side wall 80 Glass plate 81 Mask 82 Shaft 83 Hinge 84 Frame member 84a Tip 85 Glass plate 86 Holding part 87 Positioning part 91 Guide bar 92 Opening 93 Side wall 94 Leaf spring 95 Shaft 96 Elongated hole 97 Tension spring 98 Return member 99 Seesaw member 100 Positioning shaft 101 Rail part 102 Projection part 103 Female screw 104 Fixing member 105 Reflective sensor 106 Male screw 107 Step part 110 Leaf spring 120 Opening part 121 Leaf spring 122 tray

Claims (4)

[Claims] 1. An illumination unit for illuminating an original, a photoelectric conversion unit for reading an image of the illuminated original, an original holding unit for holding the original, and a placing unit for placing the original holding unit. In the image input device, the document holding means has a positioning hole (or a positioning shaft) and a first side wall, and the placing means has an engagement shaft (or an engagement hole) that engages with the positioning hole. And an urging unit that is in contact with the first side wall and urges the document holding unit toward the engagement position between the positioning hole (or the positioning shaft) and the engagement shaft (or the engagement hole), A document positioning method for positioning the document by engaging the positioning hole (or the positioning shaft) with the engagement shaft (or the engaging hole) and urging the urging means to the first side wall. 2. The document holding means further comprises a second side wall substantially perpendicular to the first side wall, and the placing means further comprises a side wall substantially parallel to the urging direction of the urging means. The engagement between the positioning hole (or the positioning shaft) and the engagement shaft (or the engagement hole) and the urging of the urging means to the first side wall, the second side wall and the side wall of the placing means. The document positioning method according to claim 1, wherein the document is positioned by abutting. 3. Illuminating means for illuminating an original, photoelectric conversion means for reading an image of the illuminated original, original holding means for holding the original, and placing means for placing the original holding means. In the image input device having, the document holding means has a positioning hole (or a positioning shaft) and a first side wall, and the placing means has an engaging shaft ( (Or engaging hole) and the first side wall, and biases the document holding means toward the engaging position of the positioning hole (or positioning shaft) and the engaging shaft (or engaging hole). An image input device comprising: 4. The document holding means further comprises a second side wall which is substantially vertical to the first side wall, and the placing means is substantially parallel to the urging direction of the urging means, and the second side wall is The image input device according to claim 3, further comprising a side wall that abuts.