JP3161901B2 - Image reading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading image information as an electric signal by relatively scanning a photoelectric conversion means with respect to an optically coupled image. Further, the present invention can be applied to an image scanner for a reflection original or a transparent original as an applied device, or an image reading unit of a copying machine or a facsimile.

[0002]

2. Description of the Related Art Conventionally, for example, an image formed by reflecting light of an original image or an image formed by transmitting light of an original film is read by a line sensor such as a CCD having a light receiving element arranged linearly. The image reading device electrically scans and sequentially outputs the detection data of the light receiving elements corresponding to the pixels in the line direction of the line sensor, and outputs the original image and the line sensor in the short direction. Two-dimensional image information is to be obtained by mechanically performing relative scanning movement between the two.

FIG. 14 is a diagram showing a configuration of a conventional reading apparatus for a transparent original.

A document film 135, which is a transparent document, has its outer periphery held by a mount 184.

The carriage 161 has scanning rails 162a,
162b is slidably supported and connected to a reciprocating linear drive mechanism (not shown).
62a, 162b, ie, arrows 136a, 1
It is configured to be able to reciprocate in the 36b direction. Also,
The carriage 161 has an insertion opening 182 for inserting the original film 135 on its upper surface, and the original film 135 can be inserted in the direction of the arrow 181 to hold the original film 135 in its contents. When the operator loads the original film 135, the outer cover 1 of the apparatus main body is used.
After releasing 000, the original film 135 is inserted into the carriage 161 from above. An opening 1 is provided on a side surface of the carriage 161 which faces the image surface of the original film 135 when held inside the original film 135.
Reference numeral 83 denotes a configuration in which illumination light incident from one side of the carriage 161 can be transmitted through the original film 135 and emitted to the other side.

The illumination lamp 102 is for illuminating the original film 135. The illumination light is condensed by the illumination lens 103 and illuminates the original film 135 through the opening 183 of the carriage 161.

[0007] The transmitted light transmitted through the original film 135 passes through the opening 183 and reaches the projection lens 139. The projection lens 139 forms an image of the original film 135 on the light receiving element of the line sensor 117.

The line sensor 117 photoelectrically converts the formed image, and outputs image data as an electric signal.

When reading an image, a line sensor 117 is used.
, The detection data of the light receiving elements arranged in the line direction are sequentially electrically scanned and output, while the carriage 161 is moved by the arrow 13.
By scanning and moving in the 6a or 136b direction, two-dimensional image information can be obtained.

[0010]

In the above-described conventional image reading apparatus, the original film 135 is inserted through the insertion slot 182.
When the document is loaded, the insertion operation of the original film 135 is performed from the upper side to the lower side, so that it is necessary to open the outer cover 1000 at the upper part of the apparatus main body.
Since the upper exterior cover 1000 is opened, dust and foreign matter often fall into the inside of the apparatus.

When these are inserted into the carriage 161 which is a holding portion of the original film 135, the original film 13
5 cannot be accurately held at a predetermined position, resulting in tilting of the read image or defocusing of the image.

Further, if the above-described foreign matter enters the scanning movement mechanism, the scanning movement accuracy is reduced, causing distortion or blurring of the read image, or the movement load is increased, resulting in malfunction.

In order to prevent dust and foreign matter from dropping, a configuration was considered in which the open position of the scanning movement mechanism and the outer cover 1000 were separated. However, the original was moved from the open position of the outer cover 1000 to the scanning movement mechanism inside the apparatus. A special mechanism for carrying and moving is required, and the structure is complicated.

In view of the above problems, the present invention realizes a configuration in which dust or foreign matter hardly enters a document holding unit or a scanning moving unit formed inside the apparatus with a simple mechanism, and provides a method for reducing the cause of a defect in a read image and the like. It is an object of the present invention to provide an image reading apparatus that eliminates the cause of a malfunction and has a comfortable operability.

[0015]

According to the present invention, there is provided an image reading apparatus comprising: a photoelectric conversion unit for converting image data of an optically formed image into an electric signal; Holding means for holding the original in a predetermined posture when the original is mounted, an opening formed on a part of the exterior of the apparatus and enabling the attaching / detaching operation of the original with respect to the holding means, A first movement range in which the holding unit can reciprocate in a direction substantially parallel to the attachment / detachment direction of the document and within which the holding unit can scan the document with respect to the photoelectric conversion unit; A second moving range which is located on the side of the opening relative to the first moving range and which enables a document attaching / detaching operation with respect to the holding means. It is characterized by comprising.

A photoelectric conversion means for converting image data of an optically formed image into an electric signal, and a holding means for detachably attaching a document to be read and holding the document in a predetermined posture when the document is mounted. Means, an opening formed in a part of the exterior of the apparatus, through which the document can be inserted when the document is attached to or detached from the holding means, and a reciprocating movement of the holding means, the reciprocation of the holding means Within the movement range,
A first movement range in which the original can be scanned with respect to the photoelectric conversion means; and a second movement range which is located on the opening side with respect to the first movement range and allows the original to be attached to and detached from the holding means. A moving unit configured to have a moving range, a shielding member capable of opening and closing the opening, and at least when the holding unit is in the second moving range for attaching / detaching a document to / from the holding unit. Opening and closing means for opening and closing the shielding member in conjunction with the movement of the moving means.

Further, the present invention is characterized in that the holding means is provided with a braking means for braking the movement of the holding means when the holding means is in the second movement range and an operation for mounting a document on the holding means is performed.

[0018]

According to the first aspect of the invention, when a document is loaded, the holding means is positioned in the second movement range by the moving means, and the document is mounted through the opening. This operation may be performed with a part of the holding means protruding outward from the opening, or may be performed with the holding means positioned inside the apparatus with respect to the opening.

After the document is held in the holding means, the holding means is moved to the first moving range by the moving means, and the image is scanned and read.

When extracting the original, the holding means is again moved to the second moving range by the moving means, and the original is extracted through the opening.

As described above, the document can be conveyed and moved with a simple mechanism without the need for a special mechanism for conveying and moving the document between the document holding unit inside the apparatus main body and the outside of the apparatus.

Also, since the original is attached to and detached from the holding means in the horizontal direction, the opening may be formed on the horizontal side surface of the exterior of the apparatus. Since the cause of the defect and the cause of the malfunction can be eliminated, and the position where the document is attached can be clarified for the operator, the operability is comfortable.

According to the image reading apparatus of the present invention, when the holding means is positioned in the second movement range for attaching and detaching the original,
The opening / closing means opens the shielding member, so that the original can be attached / detached. On the other hand, when the holding means is in the first movement range, the opening is closed by the shielding member.

In the image reading apparatus according to the second aspect, the direction of attachment and detachment of the document is not limited to the horizontal direction and may be opened upward as in the prior art, and the intrusion of dust and foreign matter into the apparatus is prevented by the shielding member. Is done.

Further, if a braking means for the holding means is provided and the holding means is braked when the operation of mounting the original is performed, the operability is further improved.

[0026]

【Example】

[First Embodiment] FIG. 10 is a perspective view showing an embodiment of a film image reading apparatus embodying the present invention.

FIG. 11 is a top view of the film image reading apparatus of the embodiment shown in FIG. This film image reading apparatus comprises a first document of a small size such as a 35 mm film and a second document of a large size such as a 4 × 5 inch film.
Of the original can be read, and the overall configuration will be described below using this.

Reference numeral 2 denotes a lamp for illuminating the first original 11 or the second original 35 with a predetermined optimum light amount.
This is a reflector for effectively collecting light emitted from the film on the film side. Reference numeral 3 denotes a condenser lens for performing Koehler illumination, and reference numeral 5 denotes a field lens for assisting the function of the condenser lens 3.

Reference numeral 4 denotes a heat-insulating glass for cutting unnecessary infrared light emitted from the lamp to protect an original such as a film or a reading sensor such as a CCD. A cyan filter 8 is used to correct the color of the base film when a negative film is used as a document. Reference numeral 9 denotes an ND filter, which is provided to correct an excessive amount of light when the film original is a positive film. Therefore, these two filters are not used at the same time and are mutually put in and out of the optical path exclusively.

Reference numeral 6 denotes a filter switching motor for performing the exclusive driving. A pinion gear fixed to the output shaft of the filter switching motor 6 includes a cyan filter 8 and an N
It meshes with a rack provided on each holding body that holds the D filter 9. Exclusive driving of the cyan filter 8 and the ND filter 9 can be realized by switching control of the rotation direction of the filter switching motor 6.

Numeral 10 denotes a diffusion plate, which illuminates the first document 11 and diffuses an illuminating light beam so that particles of the film and adhered dust are made invisible. When illuminating the second original 35, the illumination light that has passed through the cyan filter 8 or the ND filter 9 is used. However, if the diffuser plate 11 is located at the position of the illumination light path in the drawing, the illumination light is transmitted to the second original 35. It has been found from experiments that the amount of illumination light is reduced to 1/10 to 2/10 of the case where the diffuser plate 11 is not provided before reaching. Therefore, when the second document 35 is used as a document, the diffusion plate 11 is positioned outside the optical path of illumination. The driving is performed by the diffusion plate moving motor 7,
A rack and pinion mechanism is provided as in the case of the cyan filter 8 and the ND filter 9 described above.

Reference numeral 12 denotes an optical path switching mirror. When the mirror is at the position indicated by the solid line, a light beam transmitted through the first document is guided to the first imaging lens 15 for the first document. In addition, when located at the position indicated by the dotted line, the illumination light flux is guided toward the second document 35.

First, the case where the first document 11 is read will be described.

Reference numeral 14 denotes a mirror that bends light transmitted through the first document 11, 15 denotes a lens for forming an image of the first document 11 on a reading surface of a reading sensor 17 such as a three-line color CCD, 16. Is a mirror for bending the optical path.

The reading sensor 17 is a reading sensor carriage 1
8, the sensor carriage 18 can be sub-scanned in the direction of arrow 30.

Next, a case where the second document 35 is read will be described.

When reading the second original 35, the diffusion plate 10
And the first original 11 are removed from the optical path. Then, the mirror 12 is moved to the position indicated by the dotted line 12 '.

Reference numeral 31 denotes a cylindrical concave lens for expanding the illumination light beam of the Koehler illumination only in the vertical direction, and is disposed in the vicinity of a position where the condenser lens 3 forms an aerial image of the lamp 2.

32 is a mirror for bending the illumination light beam, 33
A concentric Fresnel lens for efficiently converging the illumination light beam expanded in the vertical direction to the second imaging lens 39 for the second document;
Reference numeral 34 denotes a diffusion plate for performing the same effect as that of the first document diffusion plate 10 described above.

By employing the above-described illumination configuration, it is possible to illuminate the second original 35 with a linear region extending in the vertical direction.

The light transmitted through the second original 35 is reflected by the mirror 3
It is bent at 7 and 38 and guided to the second imaging lens 39. The light passing through the second imaging lens 39 is reflected by the mirror 4
It is bent at 2 and forms an image on the reading surface of the reading sensor 17.

When reading the second document 35, the reading sensor 17 moves to the position indicated by the dotted line 17 'and is held at this position.

The second original 35 can be sub-scanned in the direction of arrow 36, and an image formed by the transmitted light in the linear illumination area is read by the reading sensor 17.

As described above, for the second document 35 of a large format, the illuminating light flux is not applied to the first document 11 in two-dimensional manner but to the minimum area required for scanning by the photoelectric conversion means. The focusing results in very efficient illumination. The maximum length of the illumination area may be based on the length of the scanning line on the second document 35, that is, the vertical width of the actual screen of the second document 35. Can be reduced, so that the illumination light path length for expanding the illumination light flux from the lamp 2 can be easily configured to be short.

Next, a driving system for sub-scanning the second document 35 will be described.

In FIGS. 12 and 13, reference numeral 61 denotes a document carriage constituting a holding means for holding the second document 35, which is movably inserted through a rail shaft 62 for sub-scanning the second document 35. ing.

The second document 35 has its outer contour held by a document carrier 84 and a document carriage 61.
Is detachably held.

The original carriage 61 is reciprocated by a linear drive mechanism M as moving means. The linear moving mechanism M converts the rotation of the original driving motor 63 into a linear movement of a driving belt 67, and moves the original carriage 61 fixed to the driving belt along a rail shaft 62. To make a linear motion. That is, the drive belt 67 is an endless belt stretched in parallel with the rail shaft 62, and has a belt drive pulley 67a and a driven pulley 67b, both ends of which are arranged apart from each other.
The document carriage 61 is fixed in the middle of the drive belt 67 while being wound around. One of the belt driving pulleys 67a is coaxially connected to the reduction pulley 66,
The deceleration pulley 66 is connected via a deceleration belt 65 to a motor pulley 64 connected to the drive shaft of the drive motor 63.

Therefore, when the original driving motor rotates, the motor pulley 64, the reduction belt 65, and the reduction pulley 6
6 and the driving belt 6 through the belt driving pulley 67a.
7 is transmitted to the carriage 7 and the carriage 61 fixed to the drive belt 67 reciprocates. However, the moving means of the original carriage 61 is not limited to such belt driving, and various other driving mechanisms can be applied.

Document carriage home position sensor 7
Reference numeral 3 detects a predetermined position of the document carriage 61 and determines a home position position.

The original carriage 61 can be moved in the sub-scanning direction by driving the second original drive motor 63.

In FIG. 12, the second document 35 having the outer contour portion sandwiched by the document carrier 84 is moved by the document carriage 61 by the above-described second document drive motor 63 and drive belt 67, etc. Frame 6
8 through the opening 68a of the original carriage 61 through the opening 68a.
Put out. Thereby, the second original 35 is moved to the original carriage 6.
The attachment / detachment can be performed in one scanning direction.

The document carriage 61 detects that the second document 35 has been attached or detached by a document presence / absence sensor (not shown), and moves to the home position by driving the second document drive motor 63.

Thereafter, the original carriage 6 is moved by the above-described method.
1 is scanned to read an image. This scanning range is a first moving range for scanning the second document 35 with respect to the reading sensor 17. This moving range only needs to scan the entire image.

After the reading scan is completed, the original carriage 61 is moved to the attaching / detaching work position. This attachment / detachment operation position is a range located on the side of the exterior opening 100a with respect to the scanning range, and is a range in which the attachment / detachment scanning of the second document 35 can be performed.

Further, the above operation will be described in detail with reference to FIGS.

Reference numeral 100 denotes an outer cover on the front side (operating side) of the main unit, which has a cover opening 100a. The cover opening 110 a coincides with the frame opening 68 a of the frame 68, and the original carriage 61 is driven by the original drive motor 63 and the drive belt 67, and the second original 35.
To the removable position.

The following are provided between the frame 68 and the outer cover 100.

Reference numeral 101 denotes a rotation member which is rotatable by engaging with the second document carriage 61, and reference numeral 102 denotes a rotation member center axis serving as a rotation center of the rotation member 101. 1
Reference numeral 03 denotes a door member as a shielding member that covers the opening 100a of the exterior cover 100, and reference numeral 104 denotes a door member shaft that links the door member 103 and the rotating member 101.

The home position of the original carriage 61 is the position shown in FIG. 1. In this position, the original carriage 61 is inside the frame 68 and the rotating member 10
It does not engage with 1.

To read the image of the second document 35 by driving the document drive motor 63, the document carriage 61 is scanned to the position shown by the dotted line in the sub-scanning direction, and the image is read by the method described above. This range is the first movement range.

In order to attach / detach the second original 35 from / to the original carriage 61, the position shown in FIG. 2, ie, the position where the leading end of the original carriage 61 comes out of the opening of the outer cover 100 when extending in the sub scanning direction Move to. This moving range is the second moving range.

As a result, the rotating member 101 engages with the original carriage 61, rotates about the rotating member center shaft 102, and is linked to the door member 103 by the door member shaft 104.
Moves from the opening 110a of the exterior cover 100 to open the opening 110a. The opening and closing mechanism of the door member 103 constitutes opening and closing means.

The original drive motor 63 is not driven so that the original carriage 61 does not move when the second original 35 having the outer contour portion sandwiched by the original carrier 84 is attached or detached, and is electrically held and rotated. Is fixed. That is, the original driving motor 63 is used as a braking unit.

After the attachment / detachment work of the second original 35 is completed, the original carriage 61 moves backward, and the door member 103 is moved to the outer cover 1.
The opening 10a is returned to the opening 00 by the force of a spring (not shown), and the opening 10a is closed. Accordingly, except when the second document 35 is attached or detached, light, dust, or the like does not enter through the opening portion 100a of the outer cover 100, and the function described above is performed without using a special device. Further, by providing the opening 100a on the exterior surface on the front side of the apparatus main body, the location where the film is mounted is short and clear for the operator, so that the operability is increased.

[Second Embodiment] The operation of the second document carriage 61 will be described with reference to FIGS. 3 and 4 in the same manner as in the first embodiment.

Reference numeral 100 denotes an outer cover on the front side (operating side) of the main unit, which has an opening. This opening coincides with the opening of the frame 68 so that the original carriage 61 can move to a position where the second original 35 can be attached and detached.

The following are provided between the frame 68 and the outer cover 100.

Reference numeral 111 denotes a rotation member which is rotatable by engaging with the second document carriage 61, and reference numeral 112 denotes a rotation member center axis serving as a rotation center of the rotation member 111. 1
Reference numeral 13 denotes a door member that covers the opening 100a of the exterior cover 100, and reference numeral 114 denotes a door member shaft serving as a rotation center of the door member 113.

The rotating member 111 and the door member 113 are engaged with each other by a gear.

The home position of the second document carriage 61 is the same as that of the first embodiment (not shown). At this time, the second document carriage 61 is mounted on the 4 × 5 frame 68.
And does not engage with the rotating member 111.

The second original 35 is moved to the second original carriage 6
In order to attach / detach the document carriage 1 from the position shown in FIG. 4, it moves to the position shown in FIG.

As a result, the rotating member 11 engages with the second document carriage 61, rotates about the rotating member center shaft 112, and the door member 113 is centered on the door member shaft 114 due to the engagement of the gears. To move from the opening 100a of the exterior cover 100 to open the opening 100a.

The second original drive motor 63 prevents the original carrier 61 from moving when attaching and detaching the second original 35 whose outer contour is held by the original carrier 84.
Is not driven, and is electrically held to fix the rotating shaft.

After the attachment / detachment work of the second original 35 is completed, the original carriage 61 moves backward, and the door member 113 is moved to the outer cover 1.
The spring 100 (not shown) returns to the opening 100, and the opening 100a is closed. As a result, the second original 35
It is safe without light or dust entering through the opening 100a of the outer cover 100 except when the device is attached or detached, and performs the functions described above without using a special device. Further, by providing the opening 100a on the outer surface on the front side of the apparatus main body, the mounting position of the original film becomes short and clear for the operator, so that the operability is increased, and the same effect as in the first embodiment is obtained. obtain.

[Third Embodiment] As in the first and second embodiments, the operation of the original carriage 61 will be described with reference to FIGS.
This will be described with reference to FIG.

Reference numeral 100 denotes an exterior cover on the front side (operation side) of the main unit, which has an opening 100a. This opening 1
00a coincides with the opening 68a of the frame 68, and the original carriage 61 can move to a position where the second original 35 can be attached and detached.

The original carriage 6 is attached to the outer cover 100.
Door member 123 which is rotatable by engaging with the door member 1;
A door member shaft 124 serving as a center of rotation of 23 is provided.

The home position of the original carriage 61 is the same as that of the first embodiment (not shown). At this time, the original carriage 61 is located inside the 4 × 5 frame 68 and engages with the door member 123. There is no.

In order to attach and detach the second original 35 from the original carriage 61, the position shown in FIG. 6, ie, the position where the leading end of the original carriage 61 comes out of the opening of the outer cover 100 when extending in the sub-scanning direction. Move to.

As a result, the door member 123 engages with the original carriage 61 and rotates about the door member shaft 124 to open the opening 100a of the exterior cover 100. here,
In the first and second embodiments, the door member is the exterior cover 100.
However, in this embodiment, since the door member 123 opens to the outside of the exterior cover 100, the moving amount of the second document carriage 61 is increased so that the insertion opening 82 travels from the door member 123. . Thus, even if the door member 123 is opened outward, the second document 35 is guided into the insertion opening 82 without obstructing the attachment / detachment of the second document 35, thereby improving operability.

The second original drive motor 6 prevents the original carriage 61 from moving when the second original 35 whose outer contour is held by the original carrier 84 is attached or detached.
No. 3 is not driven and is electrically held to fix the rotating shaft.

After the attachment / detachment work of the second original 35 is completed, the original carriage 61 moves backward, and the door member 123 closes the opening 100a of the outer cover 100 by the force of a spring (not shown). Accordingly, except when the second document 35 is attached or detached, light, dust, or the like does not enter through the opening portion 100a of the outer cover 100, and the function described above is performed without using a special device. In addition, the opening 100a
Is provided on the exterior surface on the front side of the apparatus main body, the mounting position of the original film becomes close and clear to the operator, so that the operability is increased and the same effect as in the first and second embodiments is obtained.

[Third Embodiment] In the first, second, and third embodiments, the work of attaching and detaching the second document 35 having the outer contour portion of the second document 35 sandwiched by the document carrier 84 is performed. At this time, the second original motor 63 is not driven so that the original carriage 61 does not move, and is electrically held to fix the rotating shaft.

It is the operator who mounts and removes the original carrier 61 on the original carrier 84 holding the second original 35 therebetween, so that the degree of force input differs depending on individual differences. For this reason, an excessive force may be applied, and the holding force of the second original driving motor 63 may be larger than the holding force.

Therefore, the original carriage 61 can be fixed at the attachment / detachment position of the second original 35 so that the original drive belt 67 is not damaged, and the original carriage 61 is not moved and the operability is not deteriorated. And

FIGS. 7 and 8 show an improvement over the first embodiment.

The operation of the original carriage 61 and the operation thereof are the same as those described in the first embodiment. S denotes a solenoid, which is installed at a position where it can be engaged only when the document carriage 61 is at a position where the second document 35 is attached and detached. Thus, when the second document 35 is attached or detached, the solenoid S is controlled so as to engage with the document carriage 61, fixing the document carriage 61, and moving the document carriage 61 to the home position or scanning for reading. For the movement of the range, the engagement of the solenoid S is released and the solenoid S is not related.

The same effects can be obtained by making similar improvements to the second and third embodiments.

FIG. 9 shows a further improved example.

Reference numeral 125 denotes a solenoid lever operated by the solenoid S, and reference numeral 126 denotes a spring for returning the solenoid lever 125 to its original position when the solenoid S is not energized.

Thus, when the original carriage 61 moves to the attachment / detachment position of the second original 35, the solenoid lever 125 is rotated in the escape direction by the original carriage 61 without energizing the solenoid S, and thereafter the return spring 126 is moved.
As a result, the solenoid lever 125 returns to the original position and is mechanically locked so as to engage with the rear portion of the document carriage 61. When the solenoid S is energized only when the document carriage 61 is pulled into the main body, the solenoid lever 12
The lock by 5 is released.

[0093]

As described above, the image reading apparatus of the present invention can realize the transfer of a document between the holding means inside the apparatus main body and the outside of the apparatus with a simple mechanism configuration.

Further, dust and foreign matter hardly enter the document holding unit and the scanning moving unit formed inside the apparatus, and the cause of a defective read image and the cause of a malfunction can be eliminated.

Further, since the location of the original document can be clarified for the operator, comfortable operability is provided.

Further, if the braking means is provided, the document attaching / detaching operation can be further facilitated.

[Brief description of the drawings]

FIG. 1 is an operation diagram of a carriage according to a first embodiment.

FIG. 2 is a diagram illustrating a carriage operation of the first embodiment.

FIG. 3 is a diagram illustrating the operation of a carriage according to a second embodiment.

FIG. 4 is a carriage operation diagram of the second embodiment.

FIG. 5 is an operation diagram of a carriage according to a third embodiment.

FIG. 6 is a diagram illustrating a carriage operation according to a third embodiment.

FIG. 7 is a carriage operation diagram of the fourth embodiment.

FIG. 8 is a diagram illustrating the operation of a carriage according to a fourth embodiment.

FIG. 9 is a carriage operation diagram of the fourth embodiment.

FIG. 10 is a perspective view of a film image reading device.

FIG. 11 is a top view of the film image reading device.

FIG. 12 is a diagram of a second document.

FIG. 13 is a diagram of a drive system of a carriage.

FIG. 14 is a conventional example.

[Explanation of symbols]

 61 Document carriage (holding means) 62 Rail axis 68 Frame 100 Exterior cover 100a Opening 101,111 Rotating member 102,112 Rotating member central axis 103,113,123 Door member (shielding member) 104,114,124 Door member Shaft (opening / closing means) 125 Solenoid lever 126 Return spring S Solenoid M Linear moving mechanism drive (moving means)

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Meiko Hoshi 3-30-2 Shimomaruko, Ota-ku, Tokyo Within Canon Inc. (56) References JP-A-1-290369 (JP, A) JP-A-2 −126258 (JP, A) Japanese Utility Model Application Hei 5-41262 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 1/04-1/207

Claims (3)

(57) [Claims] A photoelectric conversion unit for converting image data of an optically formed image into an electric signal; a document to be read can be attached and detached from a substantially horizontal direction; Holding means for holding the document, an opening formed in a part of the exterior of the apparatus to enable a document to be attached to and detached from the holding means; and a reciprocating movement of the holding means in a direction substantially parallel to the direction of attachment and detachment of the document. A first moving range in which the original can be moved with respect to the photoelectric conversion means within a reciprocating moving range of the holding means; and the opening portion side as compared with the first moving range. And a second moving range that allows the original to be attached / detached to / from the holding means. 2. A photoelectric conversion means for converting image data of an optically formed image into an electric signal, and a holding means for attaching / detaching an original to be read and holding the original in a predetermined posture when the original is mounted. Means, an opening formed in a part of the exterior of the apparatus and capable of attaching / detaching a document to / from the holding means, capable of reciprocating the holding means, within a reciprocating range of the holding means, A first movement range in which a document can be scanned with respect to the photoelectric conversion means, and a second movement range which is located on the opening side with respect to the first movement range and which allows a document attachment / detachment operation with respect to the holding means. Moving means configured to have a moving range; a shielding member capable of opening and closing the opening; and at least when the holding means is in the second moving range for attaching / detaching a document to / from the holding means. , Moving the moving means And closing means for opening and closing the shielding member in conjunction with,
An image reading apparatus comprising: 3. The holding device according to claim 1, further comprising a braking device for braking the movement of the holding device when the holding device is in the second movement range and an operation of attaching a document to the holding device is performed. Image reading device.