JP2009260476A - Automatic document feeder and document reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic document feeder and a document reader that improve sealing properties of a read unit. <P>SOLUTION: The automatic document feeder (ADF) includes a curved document conveying path, and a second scanner unit 60 of a reduction optical system disposed inside the document conveying path. The second scanner unit 60 includes a scanner frame 12 and a relay substrate 70. The scanner frame 12 is configured to surround the outer periphery of the second scanner unit 60. The relay substrate 70 is suitable for the scanner frame 12. An internal harness 71 is connected to the inner surface of the relay substrate 70, and an external harness 72 is connected to an outer surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention mainly relates to a configuration of an automatic document conveyance device that conveys a document along a predetermined document conveyance path.

2. Description of the Related Art Conventionally, an original reading apparatus configured to read an original with an image sensor is known. For example, Patent Document 1 discloses a configuration in which an image processing apparatus main body and an image sensor are connected by a flexible cable to read document image information in a document reading device such as an image scanner device, a facsimile device, or a copier. The reading apparatus of Patent Document 1 is configured to relay a harness connected to a contact image sensor in the middle of a book type scanner.
JP-A-8-195860

  By the way, as a configuration of the document reading device, in addition to the method using the contact image sensor of the above-mentioned Patent Document 1, reflection and aggregation of light flux are repeated by a plurality of mirrors and lenses, and light from the document is guided to the image sensor. An original reading method called a reduction optical system has also been widely used. In a document reading apparatus employing this reduction optical system, if a foreign object adheres to an internal optical component (mirror, lens, image sensor, etc.), the read image quality deteriorates, so that the foreign object does not enter the apparatus. It is strongly desired to take measures against this.

  In a document reading apparatus that employs the above-described reduction optical system and includes an ADF (auto document feeder, automatic document conveyance device), a reading unit of the reduction optical system is disposed inside the U-turn-shaped document conveyance path. A configuration may be employed. In this configuration, unlike the book scanner disclosed in Patent Document 1, since the reading unit is directly exposed to paper dust from the original conveyed on the original conveying path, the reading unit is required to have a tighter sealing property.

  However, since the reading unit is arranged in an independent state inside the ADF, it is necessary to provide an external connection harness in order to transmit data from the image sensor to the document reading apparatus main body. If an extraction hole is formed in the frame for taking out the harness, the sealing property of the reading unit is impaired, and foreign matter can be allowed to enter.

  In order to prevent the intrusion of foreign matter, for example, it is conceivable to fill the harness extraction hole with a sponge or the like. However, it is difficult to achieve good and reliable sealing simply by simply placing the padding, and there remains room for improvement in this respect.

  Further, a compact flat cable that does not disturb the optical axis may be used for wiring in the reading unit. In this case, it has become more difficult to reliably seal the periphery of the ribbon-shaped cable as compared with the round cable.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide an automatic document feeder and a document reading device in which the hermeticity of the reading unit is improved.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, an automatic document feeder having the following configuration is provided. That is, the automatic document feeder includes a U-shaped document conveyance path and a reduction optical system reading unit disposed inside the document conveyance path. The reading unit includes a frame and a relay board. The frame is configured to partition the inside and outside of the reading unit. The relay board is attached to the frame, and an internal harness can be connected to the inner surface, and an external harness can be connected to the outer surface.

  Thereby, signals can be exchanged via the electrical circuit in the frame and the relay board while maintaining the hermeticity of the frame. Accordingly, since it is difficult for foreign matter to enter the frame, it is possible to provide an automatic document feeder that maintains good read image quality over a long period of time and requires less frequent maintenance.

  The automatic document feeder preferably has the following configuration. In other words, the automatic document feeder includes an internal substrate and an external control substrate. The internal board is arranged in the vicinity of the relay board inside the frame. The external control board is disposed in the vicinity of the relay board outside the frame. The internal harness can connect the internal substrate and the relay substrate. The external harness can connect the relay board and the external control board.

  Thereby, since the length of the internal harness for connecting the external control board and the internal board and the length of the external harness can be shortened, it becomes difficult for noise to enter, and the read image quality is further improved.

  In the automatic document feeder, the relay board is preferably disposed on the same side as the external control board when viewed from the internal board.

  Thereby, since the route of the internal harness and the external harness for connecting the external control board and the internal board is simplified, the manufacturing cost can be reduced.

  In the automatic document feeder, the external harness is preferably detachable from the relay board.

  Accordingly, by removing the external harness as necessary, the external harness does not hang down outside the reading unit and becomes an obstacle, and assembly work and the like are facilitated. In addition, since the reading unit can be easily removed, maintenance is improved.

  In the automatic document feeder, a seal member is preferably provided between the relay board and the frame.

  As a result, the hermeticity of the frame is further improved, so that the read image quality can be maintained well over a long period of time.

  The automatic document feeder preferably has the following configuration. That is, the relay substrate is formed with a through hole that electrically connects the inner surface and the outer surface. The through hole is formed at a position corresponding to the seal member.

  Thereby, the airtightness of a flame | frame can be improved, electrically connecting the inner surface and outer surface of a board | substrate.

  In the automatic document feeder, the types of the internal harness and the external harness are preferably different.

  As a result, it is possible to use the most appropriate type of harness on the inside and outside of the frame in consideration of the arrangement space and cost, and the harness can be designed flexibly.

  According to another aspect of the present invention, there is provided a document reading apparatus including the automatic document feeder.

  Thereby, signals can be exchanged via the electrical circuit in the frame and the relay board while maintaining the hermeticity of the frame. Accordingly, it is difficult for foreign matter to enter the frame, and as a result, it is possible to provide a document reading apparatus that maintains good read image quality over a long period of time and requires less frequent maintenance.

  Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external perspective view of a copy facsimile multifunction peripheral (multifunction peripheral) 20 including an image scanner 10 as an original reading apparatus according to an embodiment of the present invention. FIG. 2 is a front sectional view of the image scanner device 10.

  As shown in FIG. 1, the copy facsimile multifunction machine 20 includes an image scanner device 10 that functions as a book scanner and an auto document feed scanner. The multifunction machine 20 includes an operation panel 77 for instructing the number of copies, a facsimile transmission destination, a document reading, and the like, a main body 78 including an image forming unit for forming an image on a sheet as a recording medium, and the sheet. And a paper feed cassette 79 for sequentially supplying the. The main body 78 includes a transmission / reception unit (not shown) for transmitting image data via a communication line.

  As shown in FIG. 2, the image scanner device 10 provided in the multifunction machine 20 includes a platen glass 22 and a document table cover 21. The document table cover 21 is provided with an automatic document feeder (auto document feeder, ADF) 25. Further, the image scanner device 10 includes a first scanner unit 50 and a second scanner unit 60 (reading unit) for reading an image of a document.

  When the image scanner device 10 is used as an auto document feed scanner, the ADF 25 transports originals one by one. The image on the front side (first side) of the document is read by the first scanner unit 50, and the image on the back side (second side) is read by the second scanner unit 60.

  On the other hand, when the image scanner device 10 is used as a book scanner, a user places a book document to be read on the platen glass 22 and presses the book document with the document table cover 21 so that the book document does not move. Fix it. In this state, the first scanner unit 50 can read the image of the document.

  As shown in FIG. 2, the ADF 25 provided in the document table cover 21 includes a document tray 23 provided above the document table cover 21 and a discharge tray 24 provided below the document tray 23.

  As shown in FIG. 2, a curved (laterally U-shaped) document transport path 30 that connects the document tray 23 and the discharge tray 24 is formed inside the document table cover 21. With this configuration, the documents set on the document tray 23 are separated one by one, conveyed along the curved document conveyance path 30, and discharged to the discharge tray 24. An instruction to start reading a document can be given by the operation panel 77 shown in FIG.

  Next, the configuration of each part of the ADF 25 will be described in detail along the document conveyance path 30.

  As shown in FIG. 2, a pickup roller 31 is disposed at a location where the document is supplied from the document tray 23 to the document transport path 30. A separation roller 32 is provided on the downstream side of the pickup roller 31, and a counter roller 37 is disposed to face the separation roller 32. The pickup roller 31 feeds the uppermost document on the document tray 23 and conveys it toward the downstream separation roller 32. The separation roller 32 drives the document while niping it with the opposing roller 37 to separate the document one by one and further convey it downstream.

  On the downstream side of the separation roller 32, a registration roller 39 and a counter roller that is paired with the registration roller 39 are arranged. The registration roller 39, together with the opposing roller, temporarily stops and loosens the leading side of the document conveyed by the separation roller 32, and after a predetermined time, conveys it downstream while removing the slack. Thereby, the skew of the original is corrected.

  A plurality of conveying rollers 33, 34, and 35 are provided on the downstream side of the registration roller 39. In addition, rollers are disposed so as to face the transport rollers 33, 34, and 35, respectively. The document conveyed downstream by the driving of the registration roller 39 is nipped by the conveyance rollers 33, 34, and 35 and the rollers facing them, and further conveyed downstream.

  A first document reading position 80 is set between the two conveying rollers 34 and 35, and a document passing through the first document reading position 80 is scanned and read by a first scanner unit 50 described below. It is done. A platen roller 29 is disposed at the first document reading position 80.

  The first scanner unit 50 will be described. The first scanner unit 50 is disposed on the main body 78 side, and is disposed below the ADF 25 and the platen glass 22. The first scanner unit 50 includes a light source 51, reflection mirrors 52, 53, 54, a condenser lens 55, and a charge coupled device (CCD) 56. The light source 51 irradiates light to the first document reading position 80 (or the platen glass 22) of the ADF 25, and the reflection mirrors 52, 53, and 54 reflect the reflected light from the document. The reflected light is converged by the condenser lens 55, and the converged light is configured to form an image at the CCD 56 portion.

  The light source 51 and the reflection mirror 52 of the first scanner unit 50 are configured to be movable. As described above, when the image scanner device 10 is used as a book scanner, the light source 51 and the reflection mirror 52 of the first scanner unit 50 are moved along the platen glass 22. As a result, the document placed on the platen glass 22 can be scanned.

  A case where the image scanner device 10 is used as an auto document feed scanner (when a document is read using the ADF 25) will be described. In this case, as shown in FIG. 2, the light source 51, the reflection mirror 52, and the like are moved to a position facing the first document reading position 80 and kept stationary. By driving the ADF 25 in this state, the first scanner unit 50 can scan and read the front side surface of the document that is transported through the document transport path 30 and passes the first document reading position 80.

  In the first scanner unit 50, the reflected light from the original is guided to the CCD 56 as described above to form an image, and the CCD 56 outputs an electrical signal corresponding to the image information of the original. This signal is appropriately converted and transmitted to the image forming unit provided in the multifunction device 20. Then, the transmitted image information is transferred to a sheet as a recording medium by the image forming unit, thereby realizing a copy function of the multifunction machine 20.

  In the document transport path 30, a second document reading position 90 is set on the downstream side of the first document reading position 80 (downstream of the transport roller 35). The back side of the document passing through the second document reading position 90 is scanned and read by a second scanner unit 60 described below.

  The second scanner unit 60 will be described. The second scanner unit 60 includes a scanner frame (frame) 12 that holds components and the like constituting an internal optical system. The scanner frame 12 is provided so as to partition the inside and outside of the second scanner unit 60, and is configured to cover the outside of the components of the second scanner unit 60.

  A part of the lower side of the scanner frame 12 and the discharge tray 24 is configured to be openable. This open part is normally covered with the lid part 13, whereby the second scanner unit 60 is kept sealed.

  A reading glass 42 for reading the back side of the document is provided at the bottom of the scanner frame 12. The reading glass 42 is disposed at a position corresponding to the second document reading position 90. The scanner frame 12 is provided with a counter discharge roller 40 at a position facing the discharge roller 36 provided on the ADF 25 main body side.

  The components of the second scanner unit 60 are disposed inside the scanner frame 12. Similar to the first scanner unit 50, the second scanner unit 60 includes a light source 61, reflection mirrors 62, 63, 64, 65, a condensing lens 67, and a charge coupled device (CCD) 57. Yes. The light source 61 irradiates the second original reading position 90 with light through the reading glass 42, and the reflected light from the original is reflected by the reflecting mirrors 62, 63, 64, 65 and further converged by the condenser lens 67. The image is formed on the CCD 57 portion. Similar to the CCD 56 in the first scanner unit 50, the CCD 57 outputs an electrical signal corresponding to the image information of the document. This signal is also appropriately converted and transmitted to the image forming unit provided in the multifunction machine 20.

  Further, a platen roller 38 is disposed in the ADF 25 main body so as to face the second document reading position 90 (the reading glass 42) of the scanner frame 12. With this configuration, when the original conveyed by the conveying roller 35 reaches the platen roller 38, the original is scanned and read while being conveyed by the platen roller 38.

  The document whose contents on both the front and back sides are read at the two document reading positions as described above is conveyed by the discharge roller 36 and discharged to the discharge tray 24. In this way, a so-called one-pass ADF 25 is configured, which allows double-sided reading by allowing a document to pass through the document transport path 30 only once.

  Next, a configuration for exchanging electrical signals with the inside of the second scanner unit 60 will be described with reference to FIG. FIG. 3 is a perspective view of the second scanner unit 60 with the lid 13 removed. In FIG. 3, the second scanner unit 60 is drawn upside down in order to better show the inside of the second scanner unit 60 with the lid 13 removed and the lower side opened.

  As shown in FIG. 3, a condensing lens 67, a CCD 57, a CCD substrate 58 on which the CCD 57 is mounted, and an internal substrate 59 are arranged inside the scanner frame 12. As described with reference to FIG. 2, the light source 61 and the reflection mirrors 62, 63, 64, and 65 are also arranged inside the scanner frame 12, but are not shown in FIG.

  A through hole is formed in the rear surface 121 of the scanner frame 12 (not shown in FIG. 3), and a relay board 70 is attached from the outside so as to close the through hole. The relay board 70 is disposed in the vicinity of the internal board 59 and is provided so as to partition the inside and outside of the scanner frame 12. In the following description, the term “inner surface” and “outer surface” of the relay board 70 mean surfaces facing the inner side and the outer surface of the scanner frame 12.

  The relay substrate 70 is formed in a plate shape, and unillustrated print patterns are formed on the inner surface and the outer surface, respectively. One end of the internal harness 71 is connected to the inner surface of the relay board 70, and the other end of the internal harness 71 is connected to the internal board 59.

  An external control board 75 is provided in the vicinity of the relay board 70 and at a position opposite to the internal board 59 when viewed from the relay board 70. The external control board 75 is attached to the main body side of the ADF 25, and an external harness 72 is connected to the external control board 75.

  In the relay board 70, an external connector 73 is provided on the surface (outer surface) opposite to the surface to which the internal harness 71 is connected. The external harness 72 can be detachably connected to the external connector 73.

  The CCD substrate 58 and the internal substrate 59 are connected by a lead wire (not shown). In addition, the print patterns formed on the inner surface and the outer surface of the relay substrate 70 are electrically connected by a through hole described later.

  With the above configuration, the circuits on the CCD substrate 58, the internal substrate 59, and the external control substrate 75 can be connected to each other via the relay substrate 70. That is, the light beam from the read document converged by the condenser lens 67 is converted into an electric signal by the CCD 57 on the CCD substrate 58, and this electric signal is converted into digital data by a circuit on the internal substrate 59. Then, the digital data can be sent to the external control board 75 on the ADF 25 main body side to perform appropriate processing.

  By connecting via the relay substrate 70 in this way, it is not necessary to form an extraction hole for passing the harness through the scanner frame as in the conventional scanner unit, so that the sealing performance of the scanner frame can be improved. it can.

  In the present embodiment, the substrates are arranged so that the distance between the CCD substrate 58 and the internal substrate 59 and the distance between the internal substrate 59 and the external control substrate 75 are as short as possible. A relay board 70 is provided on a wiring path that connects the internal board 59 and the external control board 75. In other words, the relay board 70 is disposed on the same back side as the external control board 75 when the internal board 59 is used as a reference. Thereby, the circuit inside the second scanner unit 60 and the external control board 75 can be connected by a short and simple path, so that the influence of noise can be reduced and the read image quality can be improved.

  In the present embodiment, since the external harness 72 is configured to be removable, the external harness 72 can be removed so as not to interfere with the second scanner unit 60 during assembly and maintenance, for example. Thereby, workability at the time of assembly and maintenance is improved.

  In this embodiment, the internal harness 71 is a compact ribbon-shaped flat cable that does not disturb the optical axis, while the external harness 72 is a relatively inexpensive round cable. Thus, since the kind of harness can be changed inside and outside the relay board 70, a flexible design is possible.

  Next, the configuration of the relay board 70 will be described in detail with reference to FIG. FIG. 4 is an enlarged sectional view conceptually showing the vicinity of the attachment portion of the relay board 70.

  As shown in FIG. 4, the relay substrate 70 is disposed so as to close the through hole 85 of the scanner frame 12, and is fixed to the scanner frame 12 with screws 76 and nuts 94.

  A seal member 81 is provided between the scanner frame 12 and the relay board 70 to seal between the relay board 70 and the scanner frame 12. The seal member 81 can be made of an appropriate material such as rubber or sponge, but it is preferable to use a material having high airtightness.

  The external connector 73 has a male terminal 731, and the male terminal 731 is connected to an unillustrated outer printed pattern formed on the outer surface of the relay board 70. Then, by inserting the male terminal 731 into the female terminal 721 of the external harness 72, the external harness 72 can be connected to the outer printed pattern.

  Further, the external connector 73 has a locking claw 732 for retaining, and by engaging this with an engagement groove 722 formed in the connector of the external harness 72, the external harness 72 is not intended. The disconnection from the external connector 73 can be prevented. In addition, the external harness 72 can be detached from the external connector 73 by removing the locking claw 732 from the engaging groove 722 using an appropriate tool or the like.

  One end of the internal harness 71 is connected to an unillustrated inner printed pattern formed on the inner surface of the relay substrate 70 by, for example, soldering. The other end of the internal harness 71 is electrically connected to a circuit (not shown) formed on the internal substrate 59 via an internal connector 591.

  Next, a configuration for connecting the print patterns on the inner surface and the outer surface of the relay board 70 to each other will be described with reference to FIG. FIG. 5 is an enlarged cross-sectional view of a place where the seal member 81 is disposed.

  As shown in FIG. 5, an inner printed pattern 91 is formed on the inner surface of the relay substrate 70, and an outer printed pattern 92 is formed on the outer side. Although the internal harness 71 and the external harness 72 are not shown in FIG. 5, the inner print pattern 91 is connected to the internal harness 71 and the outer print pattern 92 is connected to the external harness 72 as described above.

  A through hole 93 for connecting the inner printed pattern 91 and the outer printed pattern 92 is formed in the relay substrate 70. Although only one through hole 93 is shown in FIG. 5, a plurality of through holes 93 are formed on the relay substrate 70 corresponding to the circuits of the inner printed pattern 91 and the outer printed pattern 92. . The through hole 93 can be formed by an appropriate means such as solder, plating, or eyelet.

  And this through hole 93 is formed in the position corresponding to the location where the sealing member 81 is arrange | positioned. That is, as shown in FIG. 5, the inner end portion of the through hole 93 formed in a penetrating shape is configured to be blocked by the seal member 81. As a result, fine paper dust or the like can be prevented from passing through the through-hole 93 and entering the scanner frame 12, and the sealing performance is further improved.

  As described above, the ADF 25 of this embodiment includes the curved document transport path 30 and the second scanner unit 60 of the reduction optical system disposed inside the document transport path 30. The second scanner unit 60 includes a scanner frame 12 and a relay board 70. The scanner frame 12 is configured to partition the inside and outside of the second scanner unit 60. The relay board 70 is attached to the scanner frame 12. Further, an internal harness 71 can be connected to the inner surface of the relay substrate 70, and an external harness 72 can be connected to the outer surface.

  Thus, signals can be exchanged with the CCD 57 and the like in the scanner frame 12 via the relay board 70 while maintaining the sealing property of the scanner frame 12. Accordingly, since foreign matter is less likely to enter the scanner frame 12, it is possible to provide the ADF 25 that maintains good read image quality over a long period of time and requires less frequent maintenance.

  In addition, the ADF 25 of this embodiment includes an internal substrate 59 and an external control substrate 75. The internal substrate 59 is disposed in the vicinity of the relay substrate 70 inside the scanner frame 12. The external control board 75 is disposed in the vicinity of the relay board 70 outside the scanner frame 12. The internal harness 71 connects the internal board 59 and the relay board 70, and the external harness 72 connects the relay board 70 and the external control board 75.

  As a result, the lengths of the internal harness 71 and the external harness 72 for connecting the external control board 75 and the internal board 59 can be shortened, so that they are less susceptible to noise and the read image quality is further improved.

  In the ADF 25 of the present embodiment, the relay board 70 is disposed on the same back side as the external control board 75 when viewed from the internal board 59.

  Thereby, the route of the internal harness 71 and the external harness 72 for connecting the external control board 75 and the internal board 59 is simplified, so that the manufacturing cost can be reduced.

  In the ADF 25 of the present embodiment, the external harness 72 is configured to be detachable from the relay board 70.

  Thus, by removing the external harness 72 as necessary, the external harness 72 does not hang down outside the second scanner unit 60, and assembly work and the like are facilitated. In addition, since the second scanner unit 60 can be easily detached from the ADF 25, the maintainability is improved.

  In the ADF 25 of the present embodiment, a seal member 81 is provided between the relay substrate 70 and the scanner frame 12.

  Thereby, since the sealing performance of the scanner frame 12 is further improved, the read image quality can be maintained better for a longer period of time.

  Further, in the ADF 25 of the present embodiment, the relay substrate 70 is formed with a through hole 93 that electrically connects the inner surface and the outer surface. The through hole 93 is formed at a position corresponding to the seal member 81.

  Accordingly, the through hole 93 can be well sealed with the seal member 81 while the inner surface and the outer surface of the relay substrate 70 are electrically connected, and the sealing performance of the scanner frame 12 can be maintained.

  Further, in the ADF 25 of the present embodiment, the types of the internal harness 71 and the external harness 72 are different.

  As a result, it is possible to use the most appropriate type of harness on the inside and outside of the scanner frame 12 in consideration of the arrangement space and cost. For example, a flat cable that does not disturb the optical axis is used inside the scanner frame 12, and an inexpensive ordinary cable is used outside the scanner frame 12.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  The position of the relay substrate 70 is not limited to the back surface 121 of the scanner frame 12, and can be arranged at an arbitrary place such as the front surface, the upper surface, the lower surface, and the side surface. However, from the viewpoint of shortening the internal harness 71 and the external harness 72 as much as possible in order to reduce noise, it is preferable to be in a position where the internal board 59 and the external control board 75 are connected.

  The external control board 75 can be changed to be arranged above the second scanner unit 60, for example, instead of being arranged on the same side (back side) as the relay board 70 when viewed from the internal board 59. However, even in this case, from the viewpoint of reducing noise, it is preferable to arrange the external control board 75 in the vicinity of the relay board 70 so that the external harness 72 is as short as possible.

  In the present embodiment, an electrical signal from the CCD substrate 58 is sent to the external control substrate 75 via the internal substrate 59. However, instead of this configuration, the internal substrate 59 is omitted (that is, the circuit of the internal substrate 59 is provided on the external control substrate 75 side), and the CCD substrate 58 and the relay substrate 70 are directly connected by the internal harness 71. Can be changed. In this case, the CCD substrate 58 corresponds to an internal substrate.

  The connection method of the internal harness 71 and the relay board 70, and the internal harness 71 and the internal board 59 are arbitrary. For example, instead of the configuration of direct connection by soldering, an internal harness connector can be provided on the inner surface of the relay board 70 and the internal harness can be connected to this. Further, instead of using the internal connector 591, for example, the internal harness 71 can be changed to a configuration in which the internal harness 71 is soldered directly to the internal substrate 59.

  Further, the external harness 72 may be connected so as not to be removable, instead of being configured to be removable by the external connector 73. For example, it can change to the structure attached directly by soldering. However, from the viewpoint of improving workability during maintenance work and assembly work, it is preferable that the external harness 72 be configured to be removable from the relay board 70.

  The types of the internal harness 71 and the external harness 72 are not particularly limited, and any shape of cable can be used. However, as the internal harness 71, it is preferable to use a compact flat cable that does not disturb the optical axis.

  For example, the image scanner device 10 of the above-described embodiment can be applied to a copy machine, a facsimile machine, and the like instead of the copy facsimile multifunction machine 20.

  In the above embodiment, the image scanner device 10 is provided as a part of the multi-function device 20, but instead of this configuration, it can be configured as a single image scanner device.

1 is an external perspective view showing a state of a copy facsimile multifunction peripheral according to an embodiment of the present invention. 1 is a front cross-sectional view illustrating a configuration of an image scanner device according to an embodiment. The perspective view which showed the mode inside the 2nd scanner unit. Sectional drawing which showed notably the mode of the relay board | substrate vicinity. The cross-sectional enlarged view which showed the mode of the seal member vicinity.

Explanation of symbols

12 Scanner frame (frame)
20 MFP 25 Automatic Document Feeder 59 Internal Board 60 Second Scanner Unit (Reading Unit)
70 Relay board 71 Internal harness 72 External harness 73 External connector 75 External control board 81 Sealing member 91 Inner print pattern 92 Outer print pattern 93 Through hole

Claims (8)

A U-shaped document conveyance path;
A reading unit of a reduction optical system disposed inside the document conveyance path;
With
The reading unit is
A frame that partitions the inside and outside of the reading unit;
A relay board that is attached to the frame, can connect an internal harness to an inner surface, and can connect an external harness to an outer surface;
An automatic document feeder characterized by comprising: The automatic document feeder according to claim 1,
An internal substrate disposed in the vicinity of the relay substrate inside the frame;
An external control board disposed in the vicinity of the relay board outside the frame;
With
The internal harness can connect the internal board and the relay board,
The automatic document feeder, wherein the external harness is connectable to the relay board and the external control board. The automatic document feeder according to claim 2,
The automatic document feeder, wherein the relay board is disposed on the same side as the external control board when viewed from the internal board. An automatic document feeder according to any one of claims 1 to 3,
An automatic document feeder, wherein the external harness is detachable from the relay board. An automatic document feeder according to any one of claims 1 to 4,
An automatic document feeder, wherein a seal member is provided between the relay substrate and the frame. The automatic document feeder according to claim 5, wherein
The relay board is formed with a through hole that electrically connects the inner surface and the outer surface,
The automatic document feeder, wherein the through hole is formed at a position corresponding to the seal member. An automatic document feeder according to any one of claims 1 to 6,
The automatic document feeder is characterized in that the types of the internal harness and the external harness are different.   A document reading apparatus comprising the automatic document feeder according to any one of claims 1 to 7.

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