JP5927953B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus that reads an image of a document.

  An image reading apparatus that reads an image of a document is used alone as an image scanner or in combination with an image forming apparatus.

  The image reading apparatus includes a transport mechanism that transports a sheet-like document placed on a tray along a transport path. The image sensor is accommodated in the accommodating portion. The accommodating part has a shape with an open upper surface.

  While the document is being transported along the transport path, the document faces the image sensor. At this time, light is emitted from the image sensor to the document. Then, the reflected light from the original is received by the image sensor, whereby reading of the image formed on the original is achieved.

JP 2006-182542 A

  At the design stage of the image reading apparatus, the design is made so as not to cause a failure in each part, assuming the usage status of the apparatus.

  However, the inventor of the present application assumed the occurrence of a situation that cannot occur from the normal usage of the apparatus, such as a liquid such as water being applied to the image reading apparatus. And this inventor considered the structure which suppresses generation | occurrence | production of the failure of the image sensor by water wetting.

  The present invention has been made by the ingenuity of the inventor of the present application, and an object thereof is to provide an image reading apparatus capable of suppressing the occurrence of a failure of the image reading unit due to water wetting.

  In order to achieve the above object, an image reading apparatus according to the present invention includes a plate-like member and an image reading unit that is provided below the plate-like member and reads an image of a document facing the plate-like member from above. And an accommodating portion that opens upward and accommodates the image reading portion. The accommodating portion includes a bottom portion facing the image reading portion from below. An inclined portion that is inclined with respect to the horizontal direction is formed on at least a part of the bottom portion. A through hole is formed in the lower portion of the inclined portion.

  An image reading unit is disposed below the plate-like member. The document faces the plate member from above. At this time, the image reading unit reads the image of the document through the plate member.

  The image reading unit is housed in the housing unit. The housing part opens upward. The bottom portion of the storage unit faces the image reading unit from below.

  An inclined portion that is inclined with respect to the horizontal direction is formed on at least a part of the bottom. A through hole is formed in the lower portion of the inclined portion. As a result, even if the liquid enters the accommodating portion from the opening of the accommodating portion, the liquid flows on the bottom inclined portion toward the lower portion of the inclined portion. And a liquid is discharged | emitted from the through-hole formed in the lower part of an inclination part. Therefore, the image reading unit in the storage unit does not remain immersed in the liquid. Therefore, it is possible to suppress the failure of the image reading unit due to water wetting.

  The through hole is preferably formed at the lower end of the lower portion of the inclined portion. Thereby, all the liquids that have entered the housing part can be discharged without leaving the liquid on the lower end of the lower part of the inclined part. Therefore, it is possible to further suppress the occurrence of failure of the image reading unit due to water wetting.

  The housing portion may include a side portion extending upward from the bottom portion on at least one side with respect to the image reading portion in the inclination direction of the bottom portion. In this case, it is preferable that the through hole is formed in a corner portion formed by the side portion and the lower portion of the bottom portion. A corner portion formed by the side portion and the lower portion of the bottom portion is a portion that is located at the lowest position in the housing portion, and is a portion in which liquid flowing on the bottom portion is accumulated. By forming the through hole in this portion, the liquid can be well removed from the bottom. As a result, it is possible to further suppress the failure of the image reading unit due to water wetting.

  It is preferable that a plurality of through holes are formed side by side in the width direction orthogonal to the vertical direction and the inclination direction of the inclined portion. Even when the liquid reaches a position offset in the width direction, the liquid can be discharged from the through hole formed in the vicinity of the position. As a result, the liquid can be well removed from the bottom.

  A pressing member that presses the image reading unit toward the plate-like member may be provided between the image reading unit and the bottom. When the image reading unit is pressed toward the plate-like member, it is possible to suppress the image reading unit from rattling against the plate-like member. As a result, the image reading unit can be accurately positioned with respect to the plate member.

  In addition, by providing the pressing member, a gap is formed between the image reading unit and the bottom by the intervention of the pressing member. Therefore, when the liquid that has entered the storage portion flows on the bottom, the liquid can be prevented from touching the image reading portion. As a result, it is possible to further suppress the failure of the image reading unit due to water wetting.

  It is preferable that the inclined portion is formed on the entire bottom portion. In other words, the entire bottom is preferably inclined with respect to the horizontal direction. Thereby, it can suppress that the liquid which entered the accommodating part stays on the whole region of a bottom part.

  The side portion of the housing portion may surround the entire circumference of the image reading portion. Also in this configuration, since the through hole is formed, the liquid that has entered the housing portion can be discharged from the through hole.

  The side part of the accommodating part has a support part that supports the plate-like member from below and an abutting part that comes into contact with the side surface of the plate-like member, and may hold the plate-like member. Even if the liquid passes between the plate-like member and the contact portion and between the plate-like member and the support portion and enters the accommodating portion, the liquid can be discharged from the through hole.

  The image reading apparatus may further include an image forming unit that forms an image on a sheet, and a sheet discharge unit that is disposed below the storage unit and discharges a sheet on which an image is formed by the image forming unit. Good. In this case, it is preferable that a cover is provided between the storage unit and the sheet discharge unit so as to cover the storage unit from below. According to this configuration, the liquid discharged from the through hole of the housing portion can be received by the cover. Therefore, it can suppress that the liquid discharged | emitted from the through-hole of the accommodating part starts a sheet | seat discharge part. As a result, it is possible to prevent liquid from being applied to the sheet discharged to the sheet discharge unit and liquid from entering the image forming unit.

  It is preferable that the cover is formed with a recessed portion that is recessed downward in a portion facing the through hole from below. In this case, the liquid received by the cover can be stored in the recess. Therefore, it is possible to suppress the liquid received by the cover from overflowing from the cover.

  According to the present invention, even if a liquid enters the storage unit that stores the image reading unit, the liquid can be excluded from the storage unit. Therefore, it is possible to suppress the occurrence of a failure of the image reading unit due to water wetting.

FIG. 1 is a perspective view of a multifunction machine 1 according to an embodiment of the present invention. FIG. 2 is a schematic sectional view of the multifunction machine 1. FIG. 3 is a plan view of a part of the scanner frame 9 provided in the multifunction machine 1. FIG. 4 is a bottom view of the scanner frame 9. FIG. 5 is a cross-sectional view of the operation panel frame 8 and the scanner frame 9 taken along a cutting plane line AA shown in FIG. 6 is a cross-sectional view of the operation panel frame 8 and the scanner frame 9 taken along a cutting plane line BB shown in FIG. FIG. 7 is a cross-sectional view of the operation panel frame 8 and the scanner frame 9 taken along the section line CC shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
<Overall configuration of MFP>

  As shown in FIGS. 1 and 2, the multifunction machine 1 as an example of an image reading apparatus has a facsimile function and a printer function in addition to a scanner function. The scanner function is a function for reading a document image. The facsimile function is a function for transmitting and receiving image data via a public telephone line. The printer function is a function for forming an image on a sheet such as paper based on image data.

  Note that the front and rear, the left and right, and the top and bottom are defined when the image scanner 1 is viewed from the front side with the multifunction device 1 placed on a plane. In each figure after FIG. 1, in order to help understanding of the drawing, the prescribed direction is indicated by an arrow.

  The multi-function device 1 includes a main body casing 2.

  The main casing 2 is formed in a substantially rectangular shape in plan view. In the main casing 2, a left side wall 3 and a right side wall 4 are provided with a gap in the left-right direction, that is, in the width direction of the multifunction machine 1. The upper surfaces of the left side wall 3 and the right side wall 4 are arranged in the same plane and are inclined forward and downward, respectively.

  A discharge tray 5 as an example of a sheet discharge unit is installed between the left side wall 3 and the right side wall 4.

  The front end portion of the discharge tray 5 extends substantially horizontally rearward from the front end portions of the left side wall 3 and the right side wall 4. A portion on the rear side of the front end portion of the discharge tray 5 is inclined downward.

  As shown in FIG. 1, a supply cassette 6 that can store sheets is provided at the lower portion of the main body casing 2.

  As shown in FIG. 2, an image forming unit 7 for realizing a printer function is provided in the main body casing 2 between the discharge tray 5 and the supply cassette 6.

  The image forming unit 7 may employ an ink jet system that directly ejects fine droplets of ink onto a sheet conveyed from the supply cassette 6 to form an image on the sheet. The image forming unit 7 may adopt an electrophotographic method in which a toner image is transferred and fixed to a sheet conveyed from the supply cassette 6 to form an image on the sheet. The sheet on which the image is formed by the image forming unit 7 is discharged from the main body casing 2 onto the discharge tray 5.

  As shown in FIGS. 1 and 2, the operation panel frame 8 and the scanner frame 9 are installed between the left side wall 3 and the right side wall 4 so as to overlap in the vertical direction above the discharge tray 5.

  An operation panel 10 is provided on the upper surface of the operation panel frame 8 as shown in FIG.

  The upper surface of the operation panel 10 is disposed in the same plane as the substantially second half portion of the upper surfaces of the left side wall 3 and the right side wall 4. A liquid crystal display 11 and various operation buttons 12 are arranged on the upper surface of the operation panel 10. By pressing the operation button 12, settings relating to the scanner function, printer function, and facsimile function can be performed. Then, information such as the set contents is displayed on the liquid crystal display 11.

  A handset 13 is provided on the upper surface of the left side wall 3. In the multi-function device 1, the handset 13 can be picked up from the upper surface of the left side wall 3 to make a call via a public telephone line.

  As shown in FIG. 2, a supply roller 14, a pair of LF rollers 15, and a pair of discharge rollers 16 are provided between the operation panel frame 8 and the scanner frame 9.

  The supply roller 14 is disposed below the rear end portion of the operation panel frame 8. The supply roller 14 is provided to be rotatable about an axis extending in the left-right direction. A separation piece 17 is provided above the supply roller 14.

  The separation piece 17 is made of rubber, for example. A base end portion of the separation piece 17 is attached to the operation panel frame 8. The separation piece 17 has a posture inclined forward and downward. The free end portion of the separation piece 17 is in elastic contact with a position slightly ahead of the uppermost position on the peripheral surface of the supply roller 14 from the front upper side.

  The pair of LF rollers 15 is disposed with a space in the front and lower direction relative to the supply roller 14. Each LF roller 15 is provided to be rotatable about an axis extending in the left-right direction. One LF roller 15 is disposed relatively upward. The other LF roller 15 is disposed relatively below. The peripheral surface of the upper LF roller 15 is in contact with the peripheral surface of the lower LF roller 15 from above slightly forward.

  The pair of discharge rollers 16 is disposed at a distance from the front and lower sides with respect to the LF roller 15. Each discharge roller 16 is provided to be rotatable about an axis extending in the left-right direction. One discharge roller 16 is disposed relatively upward. The other discharge roller 16 is disposed relatively below. The peripheral surface of the upper discharge roller 16 is in contact with the peripheral surface of the lower discharge roller 16 from above.

  A contact glass 18 is provided between the LF roller 15 and the discharge roller 16.

  The contact glass 18 is a plate-like member extending in the left-right direction and the front-rear direction. The contact glass 18 is a transparent plate member made of glass. The contact glass 18 according to the present embodiment is an example of the plate member of the present invention. The contact glass 18 is disposed in a posture inclined forward and downward. The upper surface of the contact glass 18 extends along a straight line connecting the contact position of the peripheral surface of each LF roller 15 and the contact position of the peripheral surface of each discharge roller 16.

Below the contact glass 18, a CIS (Contact
An Image Sensor module 19 is provided.

  The CIS module 19 has a substantially rectangular parallelepiped shape that is long in the left-right direction as a whole. For example, an LED light source, a lens, and an image sensor are provided in the CIS module 19. A substrate 23 on which electronic components including an image sensor are mounted is provided on the bottom of the CIS module 19.

  A pressing member 20 is provided above the contact glass 18.

  The pressing member 20 is made of, for example, a thin metal plate. A proximal end portion of the pressing member 20 is attached to the operation panel frame 8. The holding member 20 extends forward and downward from the base end portion toward the contact glass 18, bends along the upper surface of the contact glass 18, extends forward in parallel with the upper surface of the contact glass 18, and the upper surface of the contact glass 18. It is bent in the direction perpendicular to.

  The scanner frame 9 has a document placement portion 21 that extends rearward and upwardly behind the supply roller 14.

  A document placing tray 22 is provided behind the document placing portion 21.

The document placing tray 22 extends rearwardly. The upper surface of the document placement tray 22 is disposed in the same plane as the upper surface of the document placement portion 21, and is inclined at the same inclination angle as the upper surface of the document placement portion 21.
<Reading an image>

  The multifunction device 1 can read an image of a sheet-like document by a scanner function. Hereinafter, reading of an image of a document will be described in time series.

  The document is placed on the document placement unit 21 and the document placement tray 22 with the surface on which the image is formed facing downward, straddling them. At this time, the document is inserted between the operation panel frame 8 and the scanner frame 9 until the leading end of the document comes into contact with the supply roller 14 and the separation piece 17.

  For example, the start of reading an image of a document is instructed by pressing the operation button 12 of the operation panel 10. When the start of reading is instructed, the supply roller 14 is rotated clockwise as viewed from the left side. Then, the conveyance of the document is started by the frictional force between the lower surface of the document and the peripheral surface of the supply roller 14.

  The document passes between the supply roller 14 and the separation piece 17 and is conveyed toward the LF roller 15. The upper LF roller 15 is rotated counterclockwise as viewed from the left side. The lower LF roller 15 is rotated clockwise as viewed from the front side. When the leading edge of the document comes into contact with the contact portion of the circumferential surface of each LF roller 15, the leading edge portion of the document is drawn between the circumferential surfaces of each LF roller 15 by the rotation of the LF roller 15. The peripheral surfaces of the upper and lower LF rollers 15 are in contact with the upper surface and the lower surface of the document, respectively, and a conveying force is applied to the document from the peripheral surface of the LF roller 15.

  As the document is conveyed, the lower surface of the document faces the contact glass 18. As the document is further conveyed, the document enters between the contact glass 18 and the pressing member 20. The lower surface of the document is pressed against the upper surface of the contact glass 18 by the pressing member 20. Then, light is irradiated from the CIS module 19 to a portion of the document sandwiched between the contact glass 18 and the pressing member 20. The reflected light from the lower surface of the document is received by the image sensor in the CIS module 19 so that the image formed on the lower surface of the document can be read.

The upper discharge roller 16 is rotated counterclockwise when viewed from the left side. The lower discharge roller 16 is rotated clockwise as viewed from the left side. When the leading edge of the document comes into contact with the contact portion of the peripheral surface of each discharge roller 16, the leading edge of the document is drawn between the peripheral surfaces of each discharge roller 16 by the rotation of the discharge roller 16. The peripheral surfaces of the upper and lower discharge rollers 16 are in contact with the upper surface and the lower surface of the document, respectively, and a conveying force is applied to the document from the peripheral surface of the discharge rollers 16. Thereby, the conveyance of the sheet by the discharge roller 16 is continued. When the trailing edge of the document is separated from the discharge roller 16, the document is discharged onto the discharge tray 5.
<Container>

  As shown in FIGS. 2, 3, and 4, the scanner frame 9 is formed with an accommodating portion 31.

  The accommodating part 31 has the bottom part 32 and the side part 33, as FIG.5, FIG.6 and FIG.7 shows.

  The bottom portion 32 is disposed below the CIS module 19 with a space therebetween. The bottom 32 is formed in a rectangular plate shape that is long in the left-right direction. Further, the bottom 32 is inclined forward and downward at the same inclination angle as the inclination angle of the contact glass 18 with respect to the horizontal plane. When viewed from a direction orthogonal to the top surface of the bottom portion 32, the peripheral portion of the bottom portion 32 protrudes to the side along the top surface of the bottom portion 32 with respect to the CIS module 19.

  The side portion 33 has a wall portion 34, a support portion 35, and a contact portion 36.

  The wall 34 extends from the entire peripheral edge of the bottom 32 toward the contact glass 18 in a direction perpendicular to the bottom 32.

  The support part 35 is formed in the shape of a square basket that projects laterally from the entire upper end of the wall part 34.

  The contact portion 36 extends upward from the entire peripheral edge portion of the support portion 35 in a direction orthogonal to the contact glass 18.

  The contact glass 18 is disposed so as to close the opening of the housing portion 31 and is held in the housing portion 31. Specifically, the contact glass 18 is disposed inside the contact portion 36. A support portion 35 is in contact with the peripheral edge portion of the lower surface of the contact glass 18 from below. The contact portion 36 is in contact with the side surface of the contact glass 18. Accordingly, the contact glass 18 is supported from below by the support portion 35 and is positioned in a direction parallel to the bottom portion 32 by the contact portion 36.

  Further, the CIS module 19 is disposed in a space between the contact glass 18 and the accommodating portion 31. As shown in FIGS. 4 and 6, the bottom portion 32 is formed with concave portions 37 that are recessed downward at two positions spaced in the left-right direction. As shown in FIG. 6, a coil spring 38 as an example of a pressing member is disposed in each recess 37. Each coil spring 38 is interposed between the CIS module 19 and the recess 37 in a compressed state. The CIS module 19 is urged toward the contact glass 18 by the elastic force of the coil spring 38. As a result, the CIS module 19 is pressed against the contact glass 18 and positioned relative to the contact glass 18 without rattling. Further, the coil spring 38 is interposed between the CIS module 19 and the concave portion 37, so that a gap 39 is generated between the CIS module 19 and the bottom portion 32.

As shown in FIGS. 3, 4, and 5, three through holes 40 are formed in the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33 at intervals in the left-right direction. Specifically, one through hole 40 is formed at each of the central portion, the left end portion, and the right end portion in the left-right direction at the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33. As shown in FIG. 4, each through hole 40 straddles the front end portion of the bottom portion 32 and the side portion 33. Each through-hole 40 has a rectangular shape in both the front view and the bottom view.
<Cover>

  A tray-like cover 51 is provided below the accommodating portion 31.

  The cover 51 is attached to the scanner frame 9. Specifically, a plurality of cylindrical bosses 52 are formed on the scanner frame 9. Each boss 52 protrudes downward from the scanner frame 9 and extends in a direction perpendicular to the contact glass 18. With the upper surface of the cover 51 in contact with the lower end of each boss 52, the screw 53 passes through the cover 51 and the tip of the screw 53 is screwed into the boss 52, so that the cover 51 is attached to the scanner frame 9. Yes.

The cover 51 is formed with a recess 54 that is recessed downward except for its front end. The through hole 40 of the housing portion 31 faces the front end portion of the recess 54 from above.
<Effect>

  As described above, the CIS module 19 is disposed below the contact glass 18. The document faces the contact glass 18 from above. At this time, the image of the original is read through the contact glass 18 by the CIS module 19.

  The CIS module 19 is accommodated in the accommodating portion 31. The accommodating part 31 is opened upward. The bottom part 32 of the housing part 31 faces the CIS module 19 from below.

  The bottom portion 32 is an example of an inclined portion, and the whole is inclined forward and downward with respect to the horizontal plane. A through hole 40 is formed in the lower portion of the bottom portion 32, specifically, in a corner portion formed by the front end portion of the bottom portion 32 and the side portion 33. Thereby, even if the liquid enters the storage portion 31, the liquid flows on the bottom portion 32 toward the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33. Then, the liquid is discharged from a through hole 40 formed at a corner formed by the front end portion of the bottom portion 32 and the side portion 33. For this reason, the CIS module 19 in the accommodating portion 31, in particular, the substrate 23 of the CIS module 19 does not remain immersed in the liquid. Therefore, the occurrence of a failure of the CIS module 19 due to water wetting, for example, the occurrence of a failure of the substrate 23 of the CIS module 19 can be suppressed.

  A corner portion formed by the front end portion of the bottom portion 32 and the side portion 33 is a lower end of the bottom portion 32. Since the through holes 40 are formed at the corners, all of the liquid that has entered the storage portion 31 can be discharged without leaving the liquid on the lower end of the bottom portion 32. Therefore, the occurrence of a failure of the CIS module 19 due to water wetting can be further suppressed.

  Further, the entire bottom 32 is inclined with respect to the horizontal direction. Thereby, it is possible to suppress the liquid that has entered the housing portion 31 from staying over the entire area of the bottom portion 32.

  Only one through hole 40 may be formed, or a plurality of through holes 40 may be formed. In the multifunction machine 1, three through holes 40 are formed at intervals in the left-right direction. Thereby, even if the liquid reaches a position shifted in the left-right direction, it can be discharged from the through hole 40 formed in the vicinity of the position. As a result, the liquid can be favorably excluded from the bottom 32.

  A coil spring 38 is provided between the CIS module 19 and the bottom 32 to press the CIS module 19 toward the contact glass 18. By pressing the CIS module 19 toward the contact glass 18, it is possible to prevent the CIS module 19 from rattling against the contact glass 18. As a result, the CIS module 19 can be accurately positioned with respect to the contact glass 18.

  Further, by providing the coil spring 38, a gap 39 is formed between the CIS module 19 and the bottom portion 32 due to the intervention of the coil spring 38. Therefore, when the liquid that has entered the storage portion 31 flows on the bottom portion 32, it can be prevented that the liquid touches the CIS module 19. As a result, the occurrence of failure of the CIS module 19 due to water wetting can be further suppressed.

  The side portion 33 of the housing portion 31 surrounds the entire circumference of the CIS module 19. Also in this configuration, since the through hole 40 is formed, the liquid that has entered the housing portion 31 can be discharged from the through hole 40.

  The side portion 33 of the housing portion 31 includes a support portion 35 that supports the contact glass 18 from below, and a contact portion 36 that contacts the side surface of the contact glass 18. The side portion 33 holds the contact glass 18. Even if the liquid passes between the contact glass 18 and the contact portion 36 and between the contact glass 18 and the support portion 35 and enters the accommodating portion 31, the liquid can be discharged from the through hole 40.

  The multifunction device 1 further includes an image forming unit 7 that forms an image on a sheet, and a discharge tray 5 that is disposed below the storage unit 31 and that discharges the sheet on which the image is formed by the image forming unit 7. ing. A cover 51 is provided between the storage part 31 and the discharge tray 5 so as to cover the storage part 31 from below. According to this configuration, the liquid discharged from the through hole 40 of the accommodating portion 31 can be received by the cover 51. Therefore, it is possible to suppress the liquid discharged from the through hole 40 of the storage portion 31 from being applied to the discharge tray 5. As a result, it is possible to prevent liquid from being applied to the sheet discharged to the discharge tray 5 and liquid from entering the image forming unit 7.

The cover 51 is preferably formed with a recess 54 that is recessed downward at a portion facing the through hole 40 from below. In this case, the liquid received by the cover 51 can be stored in the recess 54. Therefore, it is possible to prevent the liquid received by the cover 51 from overflowing from the cover 51.
<Modification>

  As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  In the above-described embodiment, the configuration in which the entire bottom portion 32 is inclined with respect to the horizontal direction is taken up. However, an inclined portion that is inclined forward and downward with respect to the horizontal plane may be formed on at least a part of the bottom portion 32 such as the front end portion of the bottom portion 32.

  Further, the configuration in which the side portion 33 is formed so as to surround the entire circumference of the CIS module 19 is taken up. However, for example, the side portion 33 may be formed so that the rear side of the CIS module 19 is opened.

  Further, the upper surface of the contact glass 18 extends along a straight line connecting the contact position of the peripheral surface of each LF roller 15 and the contact position of the peripheral surface of each discharge roller 16. However, the present invention is not limited to this. For example, the contact glass 18 is inclined by about 0.05 ° with respect to a straight line connecting the contact position of the peripheral surface of each LF roller 15 and the contact position of the peripheral surface of each discharge roller 16. Also good.

  In addition, in the corner portion formed by the front end portion of the bottom portion 32 of the housing portion 31 and the side portion 33, the through holes 40 are formed in the center portion, the left end portion, and the right end portion in the left-right direction. However, the position of the through hole 40 is not limited to the central portion, the left end portion, and the right end portion at the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33. For example, two through holes 40 are formed in the central portion at the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33 with a space in the left-right direction, and at the left end portion or right end portion at the corner portion, 1 Individual through holes 40 may be formed. If the three through-holes 40 are formed in a corner portion formed by the front end portion of the bottom portion 32 and the side portion 33 in a dispersed or concentrated manner at a position where the liquid that has entered the storage portion 31 can be discharged well. Good.

  The number of through holes 40 may be one. For example, when the bottom portion 32 of the accommodating portion 31 is inclined to the front right side, only one through hole 40 is formed at the right end portion of the corner portion formed by the front end portion of the bottom portion 32 and the side portion 33. Also good. That is, one through hole 40 may be formed at the lowest position in the corner formed by the front end portion of the bottom portion 32 and the side portion 33.

  The number of through holes 40 may be two. For example, one through hole 40 may be formed at each of a left end portion and a right end portion of a corner portion formed by the front end portion of the bottom portion 32 and the side portion 33.

  The number of through holes 40 may be four or more.

  In addition, the through-hole 40 is assumed to be rectangular in both front view and bottom view. However, the shape of the through hole 40 is not limited to this. For example, the through hole 40 may have a semicircular shape both in front view and bottom view. Further, the through hole 40 may have a rectangular shape in one of the front view and the bottom view, and may have a semicircular shape in the other. Furthermore, the through-hole 40 may have a shape other than a rectangular shape and a semicircular shape such as an elliptical shape in front view and bottom view.

  In the above-described embodiment, the coil spring 38 has been described as an example of the pressing member. However, the present invention is not limited thereto, and the pressing member may be a sponge, a leaf spring, or the like.

  Furthermore, although the case where the present invention is applied to the multi function device 1 is taken as an example, the present invention may be applied to an image scanner that does not have a facsimile function and a printer function but has only a scanner function.

  In addition, various design changes can be made to the above-described configuration within the scope of the matters described in the claims.

DESCRIPTION OF SYMBOLS 1 Multifunction machine 5 Discharge tray 7 Image formation part 18 Contact glass 19 CIS module 31 Storage part 32 Bottom part 33 Side part 35 Support part 36 Contact part 38 Coil spring 39 Gap 40 Through-hole 51 Cover 54 Recessed part

Claims (8)

A plate-like member;
An image reading unit that is provided below the plate-like member and reads an image of a document facing the plate-like member from above;
An accommodating portion that opens upward and accommodates the image reading portion ;
A cover provided so as to cover the storage portion from below ,
The accommodating portion includes a bottom portion facing the image reading portion from below,
A gap is formed between the image reading unit and the bottom,
At least a part of the bottom is formed with an inclined portion that is inclined with respect to the horizontal direction,
The accommodating portion includes a side portion extending upward from the bottom portion,
A through hole is formed in a corner portion formed by the lower end of the inclined portion and the side portion ,
The image reading apparatus, wherein the through hole faces the cover from above . The image reading apparatus according to claim 1 , wherein a plurality of the through holes are formed side by side in a direction perpendicular to the vertical direction and the inclination direction of the inclined portion. A pressing member provided between the image reading unit and the bottom, and pressing the image reading unit toward the plate-like member;
3. The image reading apparatus according to claim 1, wherein the gap is formed between the image reading unit and the bottom by interposing the pressing member. The inclined portion, the is formed on the entire bottom, the image reading apparatus according to any one of claims 1-3. Said side is extended upward from the bottom, on the side along the inclination direction of the inclined portion with respect to the image reading section, enclose take the entire circumference of the image reading unit, according to claim 1-4 The image reading apparatus according to any one of the above. It said side includes a supporting portion supporting the plate-like member from below, and a contact portion in contact with the side surface of the plate-shaped member, and holds the plate-like member, according to claim 1 to 5 The image reading apparatus according to any one of the above. An image forming unit for forming an image on a sheet;
Is disposed below the housing portion further includes a, a sheet discharge portion sheet on which an image is formed is ejected by the image forming section,
The cover, the said accommodating portion is set vignetting between the sheet discharge unit, the image reading apparatus according to any one of claims 1-6. The cover, the through hole recess recessed downwardly facing portion from below is formed, the image reading apparatus according to any one of claims 1-7.

Images