JP6311405B2 - Image reading device - Google Patents

Description

  The present invention relates to an image reading apparatus.

  2. Description of the Related Art An image reading apparatus that includes a support unit (for example, a platen glass) that supports a document to be read and reads an image of the document in a state where the document is pressed from above by an openable cover unit is known (for example, (See Patent Document 1). In the cover portion, a document presser is provided at a location facing the platen glass when the cover portion is closed. Patent Document 1 discloses that the document retainer is composed of a sponge, a white plate, and the like.

JP 2012-151703 A

  However, it is difficult to make the thickness of the sponge as described above uniform on the processed surface, and the thickness of the sponge tends to vary. When the thickness of the sponge varies, the distance between the cover portion and the glass surface also varies.

  For this reason, if the cover part and the support part are not in an appropriate positional relationship due to such variations, it may not be possible to shield outside light or diffused light from the light emitting element of the image sensor as designed. As a result, there is a problem that the quality of the read image becomes unstable.

  In view of the above circumstances, it is desirable to provide an image reading device that can easily optimize the distance between the cover portion and the support portion.

  An image reading apparatus described below includes a support unit that supports a document, a cover unit that can be displaced between a closed position that covers the support unit and an open position that exposes the support unit, and the support unit. A reading unit that is disposed at a position opposite to the cover unit in the closed position and reads an image of a document supported by the support unit, the cover unit including a base unit and the base unit A non-foamed resin-made resin part attached to the pressing part, which is displaceable relative to the base part when the cover part is displaced to the closed position, and the pressing part, A white portion disposed at a position facing the support portion when the cover portion is displaced to the closed position.

  According to the image reading apparatus configured as described above, the pressing portion is configured such that a resin component made of non-foamed resin is attached so as to be relatively displaceable with respect to the base portion. When the cover part is displaced to the closed position, the pressing part is displaced relative to the base part by a force acting from the support part side. For this reason, unlike conventional products in which a pressing force is applied to a document by compressing and deforming a foam resin member, the dimensional stability of the resin parts constituting the pressing portion is made of a foam resin that easily deforms. It becomes higher than the member. Therefore, if the above-mentioned pressing part is constituted by a resin part made of non-foamed resin as described above, the cover part can be further thinned more easily than when a member made of foamed resin is used. Further, if a pressing portion having excellent dimensional stability is used, it is easy to maintain the cover portion and the support portion in an appropriate positional relationship as designed. Therefore, it is possible to shield outside light and diffused light from the light emitting element of the image sensor as designed. As a result, the quality of the read image is stabilized, and the quality of the read image can be improved.

The image reading apparatus as described above may further include the following configurations.
First, in the image reading apparatus, the white portion may include a white sheet-like component attached to the pressing portion, and a hole may be formed in the pressing portion.

  According to the image reading apparatus configured as described above, the rigidity of the pressing portion can be reduced by forming the hole in the pressing portion. Therefore, compared to a case where the rigidity of the pressing portion is excessively high, even if some distortion occurs during the molding of the pressing portion, it becomes easier to reduce or eliminate the distortion by deforming the pressing portion. Variations in dimensional stability can be suppressed. Moreover, if the rigidity of a press part falls, it will also become easy to arrange | position a press part curved appropriately. For this reason, it is possible to improve the adhesion to the support unit or the document by bending the pressing unit in a direction in which the pressing unit is easily adhered to the support unit side. Further, since the pressing portion has a hole, even if the white portion including the sheet-like component is slightly bent within a tolerance range, such a bending can be released to the hole side.

  In the image reading apparatus, a plurality of the holes are formed in the pressing portion, and the plurality of holes are at positions arranged radially from the center of the pressing portion when viewed from the through direction of each hole. It may be formed.

  According to the image reading apparatus configured as described above, the plurality of holes are formed at positions arranged radially. Therefore, the resin part between the holes at adjacent positions also has a shape extending radially from the center of the pressing part. Therefore, when molding such a pressing portion with a resin material, if the resin material is injected into the mold at a location corresponding to the vicinity of the center of the pressing portion, the resin material is directed from the central portion of the cavity toward the peripheral portion. It becomes easy to distribute evenly. Therefore, compared with the case of having holes that are not radially arranged, it is possible to suppress the occurrence of an extra defective portion when molding a resin part, and to improve the quality of the pressing portion having a plurality of holes. it can. In addition, it is possible to suppress the residual residual stress from remaining in the molded product when the pressing portion is molded, as compared with the case where the holes are not arranged radially.

In the image reading apparatus, the hole may be formed at a location where no external light enters from a direction opposite to the white portion with the pressing portion interposed therebetween.
According to the image reading apparatus configured as described above, the hole is formed at a place where the external light is not incident as described above. Therefore, even when external light is incident, the external light can be prevented from entering the back side of the white portion through the hole. Accordingly, unevenness of brightness does not occur in the white portion due to the incidence of external light, and it is possible to suppress deterioration in the quality of the image read by the reading unit.

  Further, in the image reading apparatus, the white portion has a shape having two sides parallel to the longitudinal direction at a peripheral portion, and is adhered to the pressing portion at a location along each of the two sides. Also good.

  According to the image reading apparatus configured as described above, the white portion is attached to the pressing portion at locations along the two sides as described above. Therefore, unlike the case where the white portion is adhered to the pressing portion over the entire surface, an operation for adhering the entire white portion to the pressing portion is not required while taking care not to cause wrinkles in the white portion. Therefore, the white part can be easily attached to the pressing part.

Further, in the image reading apparatus, the pressing portion may form an accommodating portion capable of accommodating an accessory component between the pressing portion and the base portion.
According to the image reading apparatus configured as described above, the pressing portion forms the housing portion as described above. Therefore, accessory parts can be accommodated in this accommodating part, and unlike the case where a similar accommodating part is not provided, there is no problem with the accommodating place of the accessory parts, and the usability of the image reading apparatus can be improved. it can.

In the image reading apparatus, the housing portion may include a rib extending in a direction of inserting and removing the accessory part on a surface of the pressing portion that faces the base portion.
According to the image reading apparatus configured as described above, the frictional resistance acting between the accessory part and the accommodating portion when the accessory part is inserted and removed is reduced as compared with the case where the equivalent rib is not provided. For this reason, it is possible to easily perform an operation of taking out the accessory part from the housing part or inserting it into the housing part.

  In the image reading apparatus, the cover portion is configured to be swingable between the closed position and the open position with a predetermined first axis as a swing center, and the pressing portion and the white portion Swings between a first position and a second position where the distance between the cover portion is larger than that of the first position, with a second axis parallel to the first axis as a swing center. Further, it may be configured to further include a biasing member capable of biasing the pressing portion toward the second position when the cover portion is in the open position.

  According to the image reading apparatus configured as described above, when the cover portion is displaced to the open position, the pressing portion is displaced to the second position in conjunction therewith. Thereby, the opening of an accommodating part can be expanded. Therefore, it is possible to facilitate the insertion / removal of the accessory parts.

  In particular, when the pressing portion is not biased to the second position side, the pressing portion may be displaced to the first position side by its own weight depending on the rotation position of the cover portion. In this case, the interval between the pressing portion and the cover portion is reduced, and it is difficult to insert and remove the accessory parts. On the other hand, if the urging member as described above is provided, the urging member suppresses the pressing portion from being displaced toward the first position by its own weight and the opening of the housing portion being narrowed. Therefore, it can maintain with the space | interval between a press part and a cover part expanded, and can attach / detach an accessory easily regardless of the rotation position of a cover part.

  In the image reading apparatus, the urging member is disposed at a position between the pressing portion and the base portion, and is the outermost member in the centrifugal direction centered on the second axis of the pressing portion. The position where the end is located and the position where the second axis is located may be disposed at a position close to the position where the end is located.

  Note that the image reading apparatus as described above includes the pressing portion as described above, thereby sufficiently suppressing variation in the distance between the support portion and the cover portion. Therefore, it is optional whether the foamed resin layer is included in the pressing part or the white part as long as the effect of suppressing such variation is not impaired. That is, even if the foamed resin layer is included in the pressing part or the white part, such a foamed resin layer exists if the distance between the support part and the cover part does not vary excessively. It is permissible to do.

1 is a block diagram illustrating a configuration of a multifunction machine. FIG. 2A is a longitudinal sectional view showing the reading unit in a state where the center cover is in the closed position. FIG. 2B is a perspective view showing the reading unit with the center cover in the open position. FIG. 3A is a perspective view showing the position and shape of the white portion in the ADF unit. FIG. 3B is a perspective view showing the position and shape of the pressing portion in the ADF unit. It is a longitudinal cross-sectional view which shows the state which has an ADF unit in a closed position. It is a longitudinal cross-sectional view which shows the state which has an ADF unit in an open position. It is a perspective view which shows the position and shape of the urging member in an ADF unit. It is a perspective view which shows an accommodating part. FIG. 8A is a plan view showing the accommodating portion side of the pressing portion. FIG. 8B is a plan view showing a state in which the accessory parts are arranged in the housing portion. It is sectional drawing in the cut location shown by the IX-IX line in FIG. 8 (B). FIG. 10A is a plan view showing an opening portion of the ADF base. FIG. 10B is an explanatory diagram showing the positional relationship between the opening portion of the ADF base and the hole of the pressing portion.

Next, an exemplary embodiment of the above-described image reading apparatus will be described.
[Configuration of MFP]
A multifunction device 1 shown in FIG. 1 has a configuration corresponding to an example of the above-described image reading apparatus. In the following description, in order to briefly explain the relative positional relationship between the respective parts constituting the multi-function device 1, the vertical and horizontal directions are also shown in the figure (FIGS. 2 to 10). The explanation will be made using each direction. Among these directions, the up and down direction is the direction perpendicular to the horizontal plane when the multifunction device 1 is installed on the horizontal plane, the front is the direction in which the operation panel 14 described later is directed, the rear is the opposite direction of the front, and the left and right directions are the above This is the left-right direction when the multifunction device 1 is viewed from the front. In addition, since the direction of the movable part or the like can be changed, the direction shown in the drawing is not always maintained.

  As shown in FIG. 1, the multi-function device 1 includes a main unit 2 and a reading unit 3 (corresponding to an example of an image reading device in this specification). An opening (not shown) is formed on the upper surface of the main unit 2. The reading unit 3 is attached to the upper part of the main unit 2 and is configured to be displaceable between a closed position and an open position. When the reading unit 3 is in the closed position, the opening of the main unit 2 is closed by the reading unit 3. When the reading unit 3 is in the open position, the opening of the main unit 2 is opened. In addition, it is comprised through this opening part so that maintenance of the component accommodated in the main body unit 2 etc. can be implemented. The reading unit 3 includes an FB unit 5 and an ADF unit 6 (corresponding to an example of a cover portion referred to in this specification). The structures of the FB unit 5 and the ADF unit 6 will be described later.

  As shown in FIG. 1, the main unit 2 is provided with a control unit 11. The control unit 11 includes a known CPU 11A, ROM 11B, RAM 11C, NVRAM 11D, interface unit 11E, and the like. The CPU 11A executes a predetermined process according to a control program stored in the ROM 11B or the RAM 11C, and thereby controls each part of the multifunction device 1.

  Control targets by the control unit 11 include an image forming unit 12, a LAN communication unit 13, an operation panel 14, an image sensor 15 (corresponding to an example of a reading unit in the present specification), a motor 16, a motor 17, and sheet detection. A sensor 18 and the like are provided. Among these, the image forming unit 12, the LAN communication unit 13, and the operation panel 14 are provided in the main unit 2. The image sensor 15 and the motor 16 are provided in the FB unit 5. The motor 17 and the sheet detection sensor 18 are provided in the ADF unit 6.

  The image forming unit 12 is configured to be able to form an image by an inkjet method on a recording medium such as cut paper. More specifically, the image forming unit 12 includes a transport mechanism for transporting a recording medium, a recording head for ejecting ink, a drive mechanism for reciprocating the recording head, and the like. However, since these are well-known configurations, further explanation and illustration are omitted. Note that the image forming unit 12 may be configured to be able to form an image by electrophotography.

  The LAN communication unit 13 includes a communication interface device compatible with a wireless LAN and a communication interface device compatible with a wired LAN. The operation panel 14 is an input device (for example, a touch panel, various buttons, and switches) that is operated when the user gives various commands to the multifunction device 1, and an operation state of the multifunction device 1. Output device (for example, a liquid crystal display device and various lamps).

  The image sensor 15 is a one-dimensional image sensor including a plurality of reading elements arranged in one direction. In the case of this embodiment, a contact image sensor (CIS) is adopted. The motor 16 is a power source for moving the image sensor 15 in the sub-scanning direction orthogonal to the main scanning direction with the arrangement direction of the reading elements of the image sensor 15 as the main scanning direction. The motor 17 is a power source for conveying the sheet in the ADF unit 6. The sheet detection sensor 18 is a sensor that detects that the leading end and the trailing end in the transport direction of the sheet transported by the ADF unit 6 have passed a predetermined detection position.

  As the sheet detection sensor 18, in the case of the present embodiment, a contact type sensor that switches on and off depending on whether or not the sheet being conveyed is in contact is employed. However, whether or not to use a contact type sensor is arbitrary, and a sensor that can detect in a non-contact manner that the leading end or the trailing end in the transport direction of the sheet has passed a predetermined detection position may be used. For example, an optical sensor capable of detecting whether the sheet being conveyed is in a state of blocking the optical path, an optical sensor capable of detecting whether light is reflected by the sheet being conveyed, or the like can be used. .

[Details of reading unit]
Next, the structure of the reading unit 3 will be described in more detail. In the reading unit 3, as shown in FIGS. 2A and 2B, the ADF unit 6 includes a sheet along a predetermined conveyance path (refer to a path indicated by a broken line in FIG. 2B). The conveyance part 20 which conveys is provided. The transport unit 20 includes a suction roller 21, a separation roller 22A, a separation piece 22B, a relay roller 23A, a relay pinch roller 23B, a reverse roller 24A, a first reverse pinch roller 24B, a second reverse pinch roller 24C, and the like. .

  As shown in FIGS. 2A and 2B, a central exterior cover 26, a left exterior cover 27, and a right exterior cover 28 are provided on the upper surface of the ADF unit 6. The central outer cover 26, the left outer cover 27, and the right outer cover 28 are rotatably supported by shaft support portions 26A, 27A, and 28A, respectively. When the central exterior cover 26 is displaced to the open position (the position shown in FIG. 2B), the central exterior cover 26 constitutes a sheet supply / discharge tray 29 that supports sheets.

  The sheet conveyed by the conveyance unit 20 is conveyed along a conveyance path indicated by a broken line in FIG. At that time, the sheets fed from the sheet supply / discharge tray 29 to the downstream side in the transport direction by the suction roller 21 are separated one by one by the separation roller 22A and the separation piece 22B. The separated sheet is sent out downstream in the conveying direction by the relay roller 23A. The leading edge position and the trailing edge position of the sheet sent out by the relay roller 23 </ b> A are detected with the contact with the sheet detection sensor 18. The sheet that has passed through the contact point with the sheet detection sensor 18 is further conveyed downstream in the conveying direction by the reverse roller 24A. As a result, the sheet is discharged onto the sheet supply / discharge tray 29.

  The FB unit 5 includes a scanner base 31 and a scanner top cover 32 as shown in FIGS. 2 (A) and 2 (B). Each of the scanner base 31 and the scanner top cover 32 is formed of a resin molded product. A platen 33 (corresponding to an example of a support portion in the present specification) made of a transparent glass plate is disposed on the scanner base 31. The platen 33 is sandwiched between the scanner base 31 and the scanner top cover 32 around the platen 33.

  A first opening 32A and a second opening 32B are formed on the upper surface of the scanner top cover 32 as shown in FIG. The platen 33 is exposed on the upper surface of the FB unit 5 at the location where the first opening 32A and the second opening 32B are formed. In the first opening 32A, the platen 33 constitutes a support surface that supports the reading object. Further, in the second opening portion 32 </ b> B, the platen 33 constitutes a contact surface with which the document conveyed by the conveyance unit 20 comes into contact. In the present embodiment, the platen 33 that is a single component is exposed in both the first opening 32A and the second opening 32B, but in each of the first opening 32A and the second opening 32B. Two corresponding platens may be provided.

  As shown in FIGS. 2A and 2B, a resin guide rail 34 is provided on the inner surface of the bottom of the scanner base 31. The guide rail 34 is integrally formed with the scanner base 31. The guide rail 34 extends in the left-right direction in FIG. 2B in a state parallel to the lower surface of the platen 33.

  A carriage 35 is disposed on the upper side of the guide rail 34. The carriage 35 is supported so as to be capable of reciprocating in the left-right direction along the guide rail 34. The carriage 35 is connected to an endless toothed belt (not shown), and when the toothed belt is circulated and driven by the motor 16 (see FIG. 1), the carriage 35 follows the toothed belt. It is configured to reciprocate in the left-right direction.

  In the image sensor 15, the main scanning direction is the front-rear direction in FIG. 2A (that is, the direction perpendicular to both the left-right direction and the up-down direction shown in FIG. 2A), and The reading element is mounted on the carriage 35 in a state of being directed upward. As a result, when the carriage 35 reciprocates in the left-right direction, the image sensor 15 moves in the sub-scanning direction together with the carriage 35. When reading the image of the sheet placed on the upper surface of the platen 33 in the first opening 32A, the image sensor 15 reads the image while moving below the first opening 32A together with the carriage 35. Further, when reading an image of a sheet conveyed by the conveying unit 20, the sheet passes through the second opening 32B while being in contact with the upper surface of the platen 33 on the way from the relay roller 23A to the reverse roller 24A. The image sensor 15 stands still below the second opening 32 </ b> B, and reads the sheet image through the platen 33.

[Details of document holding]
In the ADF base 40 (corresponding to an example of the base portion referred to in this specification) of the ADF unit 6, the portion facing the platen 33 when the ADF unit 6 is in the closed position is shown in FIG. As described above, a document presser 41 is provided. The document presser 41 includes a pressing portion 43 shown in FIG. 3B and a white portion 45 attached to the surface of the pressing portion 43. The pressing portion 43 is configured by a resin component made of non-foamed resin. The white part 45 is comprised by the white sheet-like component. The white portion 45 has a shape having two sides parallel to the longitudinal direction (the left-right direction in FIG. 3A), and the double-sided tape 46 (FIG. 3A) is provided along each of the two sides. It is affixed with respect to the press part 43 by reference.).

  The pressing portion 43 is attached to the ADF base 40 so as to be swingable via a hook or an engagement hole (not shown). As a result, the document presser 41 can be displaced between the first position shown in FIG. 4 and the second position shown in FIG. The oscillation center R1 of the ADF unit 6 is near the rear end of the ADF unit 6 when the ADF unit 6 is in the closed position (see FIG. 4). The swing center R2 of the document presser 41 is in the vicinity of the rear end of the document presser 41 when the ADF unit 6 is in the closed position (see FIG. 4).

  When the ADF unit 6 is in the closed position, the document presser 41 is in the first position as shown in FIG. At this time, the document presser 41 is closest to the ADF base 40 side. On the other hand, when the ADF unit 6 is in the closed position, the document presser 41 is in the second position as shown in FIG. At this time, the document retainer 41 is in a state farthest from the ADF base 40 side.

  As shown in FIG. 6, an urging member 47 (coil spring in this embodiment) is disposed at a position between the pressing portion 43 and the ADF base 40. The ADF base 40 is formed with a protrusion 48 having a cross section perpendicular to the protruding direction formed in a + shape. By fitting the urging member 47 into the protrusion 48, one end of the urging member 47 is connected to the ADF base 40. It is fixed to. The biasing member 47 is a position close to the position where the end 43A is located, at the position where the distal end 43A in the centrifugal direction centering on the swing center R2 in the pressing portion 43 and the position where the swing center R2 is present. It is arranged.

  When the ADF unit 6 is in the open position, the urging member 47 urges the document presser 41 toward the second position. On the other hand, when the ADF unit 6 is displaced to the closed position, the document presser 41 is pressed toward the ADF base 40 by a force acting from the platen 33 side. As a result, the document presser 41 is displaced relative to the ADF base 40 against the urging force of the urging member 47 and moves to the first position. When the ADF unit 6 is displaced to the closed position, the white portion 45 is disposed at a position facing the platen 33.

  As shown in FIG. 7, the pressing portion 43 forms an accommodating portion 53 that can accommodate the accessory 51 between the pressing portion 43 and the ADF base 40. In the present embodiment, the accessory part 51 is a part called a media tray, and is used when the image forming unit 12 forms an image on a disk medium.

  As shown in FIG. 8A, a plurality of guide portions 54 project from the surface of the pressing portion 43 on the side of the housing portion 53 along the direction in which the accessory 51 is introduced, and along these guide portions 54 The accessory 51 can be inserted and removed. A rib 55 extending in the direction of inserting / removing the accessory 51 is formed on the surface of the pressing portion 43 on the housing portion 53 side.

  The accessory 51 is accommodated in a position as shown in FIG. At this time, as shown in FIG. 9, the rib 55 comes into contact with the accessory 51 at its tip. Thereby, the accessory 51 is supported by the tip of the rib 55 having an extremely small area. Therefore, the frictional resistance generated between the accessory part 51 and the rib 55 when the accessory part 51 is inserted and removed is reduced, and the accessory part 51 can be smoothly inserted and removed from the housing portion 53.

  A plurality of holes 57 are formed in the pressing portion 43 as shown in FIG. The plurality of holes 57 are formed at positions arranged radially from the center 43C of the pressing portion 43 when viewed from the penetration direction of each hole 57 (for example, the direction perpendicular to the paper surface in FIG. 8A). . However, these holes 57 are formed at locations where external light does not enter from the direction opposite to the white portion 45 across the pressing portion 43.

  In the present embodiment, as shown in FIG. 10A, the ADF base 40 has a plurality of opening locations 59 (locations shown by hatching in FIG. 10A). These opening portions 59 are formed for their respective purposes. However, when light enters the opening portions 59 from the upper surface side of the apparatus, the light may reach the pressing portion 43 side. FIG. 10B is an explanatory diagram in which the position of the opening 59 (a position indicated by hatching in FIG. 10B) is projected on the pressing portion 43.

  Assuming that the hole 57 is formed in the pressing portion 43 immediately below the opening portion 59, the light incident from the opening portion 59 further passes through the hole 57 and reaches the white portion 45. In this case, in the white portion 45 that is a white sheet-like component, part of the light is transmitted to the platen 33 side, and unevenness in brightness may occur on the surface of the white portion 45 on the platen 33 side. Therefore, due to the occurrence of such unevenness in brightness and darkness, there is a possibility that the read image quality is affected and the image quality is deteriorated.

  Therefore, in the pressing portion 43 of the present embodiment, a plurality of holes 57 are formed radially, avoiding a position immediately below the opening location 59. Thereby, even when light is incident directly under the opening 59, the light can be blocked by the pressing portion 43. As a result, uneven brightness caused by the presence of the opening 59 on the surface of the white portion 45 on the platen 33 side does not occur.

[effect]
According to the multi-function machine 1 as described above, the pressing portion 43 is made of a resin component made of non-foamed resin, and the pressing portion 43 is attached to the ADF base 40 so as to be relatively displaceable. A pressing function by the pressing portion 43 is realized. Therefore, unlike conventional products in which a pressing force is applied to a document by compressing and deforming a foamed resin member (for example, a sponge sheet), the dimensional stability of the resin parts constituting the pressing portion 43 is It becomes higher than a member made of foamed resin.

  Therefore, variation in the distance between the ADF unit 6 and the platen 33 can be suppressed. Thereby, it becomes easy to maintain the ADF unit 6 and the platen 33 in an appropriate positional relationship as designed, and it is possible to shield outside light and diffused light from the light emitting element of the image sensor as designed. As a result, the quality of the image read by the reading unit 3 is stabilized, and the quality of the read image can be improved.

  Further, in the multifunction machine 1, since the plurality of holes 57 are formed in the pressing portion 43, the rigidity of the pressing portion 43 can be reduced. For this reason, when the pressing portion 43 is molded, it is possible to suppress the residual residual stress from remaining in the molded product as compared with a resin component without the hole 57. Accordingly, it is possible to suppress the occurrence of distortion in the pressing portion 43 at an unexpected location or the variation in dimensional stability of the pressing portion 43.

  Moreover, if the rigidity of the pressing part 43 falls, it will also become easy to arrange | position the pressing part 43 in a moderate curve. For this reason, it is possible to improve the adhesion to the platen 33 or the document by curving the pressing portion 43 in a direction in which the pressing portion 43 is easily brought into close contact with the platen 33 (the direction in which the platen 33 is convex). Further, since the pressing portion 43 has the hole 57, even if the white portion 45 is slightly bent within a tolerance range, such bending can be released to the hole 57 side.

  Further, since the plurality of holes 57 are formed at positions arranged radially, the resin portion between the holes 57 and 57 at the adjacent positions also has a shape extending radially from the center of the pressing portion 43. Therefore, when molding such a pressing portion 43 with a resin material, if the resin material is injected into the mold at a location corresponding to the vicinity of the center 43C of the pressing portion 43, the center of the cavity is formed in the mold. It becomes easy to spread the resin material evenly toward the peripheral portion. Therefore, compared with the case where the holes 57 are not arranged radially, it is possible to suppress the occurrence of an extra defective portion when molding the resin component, and the quality of the pressing portion 43 can be improved.

  Further, the plurality of holes 57 described above are formed at locations where external light is not incident as described above. Therefore, unevenness of brightness does not occur in the white portion 45 due to the incidence of external light, and it is possible to suppress deterioration in the quality of the image read by the image sensor 15.

  Moreover, the white part 45 is affixed with respect to the press part 43 in the location along each of the above two sides. Therefore, unlike the case where the white portion 45 is stuck to the pressing portion 43 over the entire surface, the work of sticking the entire white portion 45 to the pressing portion 43 while taking care not to cause wrinkles in the white portion 45 It is unnecessary. Therefore, the white part 45 can be easily attached to the pressing part 43.

  In the multifunction machine 1, since the pressing portion 43 forms the housing portion 53 as described above, the accessory 51 can be housed in the housing portion 53. Therefore, unlike the case where the similar accommodating portion 53 is not provided, the accommodation location of the accessory 51 is not troubled and the usability of the multifunction device 1 can be improved.

  Further, according to the multifunction device 1, since the urging member 47 as described above is provided, when the ADF unit 6 is displaced to the open position, the pressing portion 43 is displaced to the second position in conjunction therewith. . Therefore, the opening of the accommodating portion 53 can be widened without operating the pressing portion 43 by hand. Further, the biasing member 47 can suppress the pressing portion 43 from being displaced toward the first position by its own weight and the opening of the accommodating portion 53 becoming narrow. Therefore, the convenience at the time of carrying out insertion / extraction of the accessory 51 can be improved.

[Other cases]
The exemplary embodiments of the image reading apparatus have been described above, but the present invention is not limited to the above-described embodiments, and can be implemented in various forms without departing from the technical idea of the present invention. can do.

  For example, in the above embodiment, by providing the pressing portion 43 as described above, the variation in the distance between the platen 33 and the ADF unit 6 can be sufficiently suppressed. Therefore, either or both of the pressing portion 43 and the white portion 45 may include a foamed resin layer as long as the effect of suppressing such variation is not impaired.

Moreover, in the said embodiment, although the several hole 57 was formed in the press part 43, it is arbitrary whether such a hole 57 is formed.
Moreover, in the said embodiment, although the accommodating part 53 was formed between the press part 43 and the ADF base 40, whether it is set as the structure which forms such an accommodating part 53 is arbitrary.

  Moreover, in the said embodiment, although the urging member 47 was provided between the press part 43 and the ADF base 40, it is arbitrary whether such urging member 47 is provided. Whether or not the urging member 47 is a coil spring is arbitrary, and various spring materials other than the coil spring may be adopted as the urging member 47.

  In the above-described embodiment, the reading unit 3 included in the multifunction device 1 is illustrated as an example of the image reading device. However, whether or not it is configured as a multifunction device is arbitrary. The above-described configuration may be employed in a facsimile machine or the like.

  DESCRIPTION OF SYMBOLS 1 ... MFP, 2 ... Main body unit, 3 ... Reading unit, 5 ... FB unit, 6 ... ADF unit, 6A ... ADF base, 11 ... Control part, 11A ... CPU, 11B ... ROM, 11C ... RAM, 11D ... NVRAM 11E: Interface unit, 12: Image forming unit, 13: LAN communication unit, 14: Operation panel, 15 ... Image sensor, 16 ... Motor, 17 ... Motor, 18 ... Sheet detection sensor, 20 ... Conveying unit, 21 ... Inhalation Roller, 22A ... Separation roller, 22B ... Separation piece, 23A ... Relay roller, 23B ... Relay pinch roller, 24A ... Reverse roller, 24B ... First reverse pinch roller, 24C ... Second reverse pinch roller, 26 ... Central exterior cover, 26A ... Shaft support, 27 ... Left exterior cover, 28 ... Right exterior cover, 29 ... Sheet feeding / discharging tray, 31 ... Scanner base, 3 ... scanner top cover, 32A ... first opening, 32B ... second opening, 33 ... platen, 34 ... guide rail, 35 ... carriage, 41 ... document pressing, 43 ... pressing part, 45 ... white part, 46 ... both sides Tape, 47 ... biasing member, 51 ... accessory part, 53 ... housing part, 54 ... guide part, 55 ... rib, 57 ... hole, 59 ... opening location.

Claims (10)

A support part for supporting the document;
A cover portion that is displaceable between a closed position that covers the support portion and an open position that exposes the support portion;
A reading unit that is disposed at a position opposite to the cover unit in the closed position with the support unit interposed therebetween, and that reads a document image supported by the support unit, and
The cover part is
A base part;
Including a non-foamed resin part attached to the base part, and when the cover part is displaced to the closed position, a pressing part displaceable relative to the base part;
A white portion arranged at a position facing the support portion when the cover portion is displaced to the closed position in the pressing portion , and
The white portion includes a white sheet-like component attached to the pressing portion,
A hole is formed in the pressing portion,
The plurality of holes are formed in the pressing portion, and the plurality of holes are formed at positions arranged radially from the center of the pressing portion when viewed from the through direction of each hole.
Image reading device. The image reading according to claim 1, wherein the white portion has a shape having two sides parallel to the longitudinal direction at a peripheral portion, and is attached to the pressing portion at a location along each of the two sides. apparatus. The pressing portion, between the base portion, the image reading apparatus according to claim 1 or claim 2 forms a housing capable of accommodating portion accessory. The image reading apparatus according to claim 3 , wherein the housing portion includes a rib that extends in a direction in which the accessory is inserted and removed, on a surface of the pressing portion that faces the base portion. The cover portion is configured to be swingable between the closed position and the open position with a predetermined first axis as a swing center,
The pressing portion and the white portion have a second axis whose interval between the first position and the cover portion is larger than that of the first position, with a second axis parallel to the first axis as a swing center. Configured to be swingable between positions,
Furthermore, when the cover portion is in the open position, the image reading apparatus according to the pressing portion in claim 3 or claim 4 comprising a energizable biasing member to said second position. A support part for supporting the document;
A cover portion that is displaceable between a closed position that covers the support portion and an open position that exposes the support portion;
A reading unit that is disposed at a position opposite to the cover unit in the closed position with the support unit interposed therebetween, and that reads a document image supported by the support unit, and
The cover part is
A base part;
Including a non-foamed resin part attached to the base part, and when the cover part is displaced to the closed position, a pressing part displaceable relative to the base part;
A white portion arranged at a position facing the support portion when the cover portion is displaced to the closed position in the pressing portion , and
The pressing part forms an accommodating part capable of accommodating an accessory part between the base part and
The cover portion is configured to be swingable between the closed position and the open position with a predetermined first axis as a swing center,
The pressing portion and the white portion have a second axis whose interval between the first position and the cover portion is larger than that of the first position, with a second axis parallel to the first axis as a swing center. Configured to be swingable between positions,
And a biasing member capable of biasing the pressing portion toward the second position when the cover is in the open position.
Image reading device. The white portion includes a white sheet-like component attached to the pressing portion,
The image reading device according to claim 6 , wherein a hole is formed in the pressing portion. The white portion is a shape having two sides parallel to the longitudinal direction to the peripheral portion, at a point along the two sides, respectively, in claim 6 or claim 7 is bonded to the pressing portion The image reading apparatus described. The image reading according to any one of claims 6 to 8, wherein the housing portion includes a rib extending in a direction of inserting and removing the accessory part on a surface of the pressing portion facing the base portion. apparatus. The biasing member is disposed at a position between the pressing portion and the base portion, and has a position where the distal end portion in the centrifugal direction centered on the second axis in the pressing portion is located and the first The image reading apparatus according to any one of claims 5 to 9 , wherein the position where the second axis is located is disposed at a position close to a position where the endmost portion is located.

Images