JP2008053777A - Image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reader using a resin-made chassis, with which the inside thereof can be warmed as on the whole as possible. <P>SOLUTION: In the image reader, a heater 70 for preventing dew formation is fixed to a bottom plate portion 62 in the resin-made chassis 60 through an intermediate heat radiation plate 75 formed of a material having more superior heat conductivity than the resin-made chassis 60. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for incorporating a dew condensation prevention heater into an image reading apparatus.

  In the image reading apparatus, a platen glass is attached to an upper surface of a housing portion, and a carriage is configured to be freely scanable below the platen glass. The original is read by scanning the carriage while the original is placed on the platen glass.

  In such an image reading apparatus, a dew condensation prevention heater may be incorporated in order to prevent dew condensation on various components in the casing, in particular, optical system components.

  As a prior art related to the invention of the present application, for example, there is one described in Patent Document 1.

JP 2004-175466 A

  By the way, in the image processing apparatus as described above, it is important to warm the entire interior of the housing with a dew condensation prevention heater.

  Here, for example, when the casing is configured by a metal chassis, by fixing the dew condensation prevention heater to the metal chassis, the entire interior of the casing is warmed using the heat conductivity of the metal chassis. I can expect that.

  However, when the casing is constituted by a resin chassis, heat transfer by the chassis cannot be expected, and only the fixed portion of the dew condensation prevention heater is locally heated.

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to warm the interior of an image reading apparatus using a resin chassis as much as possible.

  In order to solve the above problems, the present invention provides a resin chassis formed in a bowl shape, and an intermediate heat radiating plate formed of a material having higher thermal conductivity than the resin chassis and fixed in the resin chassis. And a heater attached to the intermediate heat radiating plate.

  In this case, the size of the intermediate heat radiating plate in plan view may be larger than the size of the heater in plan view.

  The intermediate heat radiating plate may be made of metal.

  A platen glass may be installed on the resin chassis, and a document reading optical system mechanism for reading a document placed on the platen glass may be accommodated in the resin chassis. .

  Furthermore, you may attach the said intermediate | middle heat sink so that a clearance gap may be provided between the structural plates which comprise the said resin-made chassis.

  The gap may be sealed.

  This gap may be sealed with a rib portion that reinforces a component plate constituting the resin chassis.

  The intermediate heat radiating plate may be grounded.

  Furthermore, the intermediate heat radiating plate may be formed in a wave shape.

  The heater may be attached to the intermediate heat radiating plate via an intervening plate.

  The interposed plate may be formed of spring steel, and the interposed plate may be formed of an aluminum plate.

  Furthermore, the heater may be provided at a substantially central portion of a bottom surface constituting plate constituting the resin chassis.

  According to the image reading apparatus of the present invention, an intermediate heat radiating plate formed of a material having higher thermal conductivity than the resin chassis and fixed in the resin chassis, and a heater attached to the intermediate heat radiating plate, Therefore, the heat of the heater is transmitted to the intermediate heat radiating plate and is also radiated from the intermediate heat radiating plate. For this reason, the inside of the resin chassis can be warmed as much as possible.

  Further, if the size of the intermediate heat radiating plate in plan view is larger than the size of the heater in plan view, the inside of the resin chassis can be more effectively warmed as a whole.

  If the intermediate heat radiating plate is made of metal, the metal plate has relatively good thermal conductivity, so that the entire interior of the resin chassis can be more effectively warmed.

  Further, when a platen glass is installed on the upper part of the resin chassis, and a document reading optical system mechanism for reading a document placed on the platen glass is accommodated in the resin chassis. Is greatly affected by condensation. Therefore, it is an effective and important countermeasure against condensation that the inside of the resin chassis can be warmed as much as possible by using the heater and the intermediate heat sink as described above.

  Moreover, if the said intermediate | middle heat sink is attached so that a clearance gap may be provided between the structural plates which comprise the said resin-made chassis, it will be hard to radiate the heat | fever which generate | occur | produced with the heater outside. Therefore, the inside of the resin chassis can be effectively warmed.

  In addition, when the gap is sealed, the heat generated by the heater is hardly radiated to the outside, and the inside of the resin chassis can be effectively warmed.

  Further, when the gap is sealed by a rib portion that reinforces a component plate constituting the resin chassis, the rib portion can realize a reinforcing function and a sealing function, and the configuration can be made relatively simple. it can.

  Further, when the intermediate heat radiating plate is grounded, electromagnetic shielding can be performed by the intermediate heat radiating plate.

  Further, by forming the intermediate heat radiating plate in a wave shape, the heat radiation area by the intermediate heat radiating plate can be increased, and the inside of the resin chassis can be more effectively warmed up as a whole.

  Further, when the heater is attached to the intermediate heat radiating plate via an interposed plate, a heater mounting structure such as a bent and fixed structure can be built in the interposed plate. And a heater can be attached by fixing the interposition board to an intermediate | middle heat sink. Thereby, it is not necessary to make a structure for fixing the heater to the intermediate heat radiating plate itself, and the heater can be fixed without significantly impairing the function of the intermediate heat radiating plate.

  Further, when the interposition plate is formed of spring steel or aluminum plate, the adhesion between the interposition plate and the intermediate heat radiating plate can be improved, and heat can be efficiently transferred from the heater to the intermediate heat radiating plate.

  Further, when the heater is provided at a substantially central portion of the bottom surface constituting plate constituting the resin chassis, the inside of the resin chassis can be warmed around the substantially central portion of the bottom surface constituting plate, and the whole Can be warmed up.

  Hereinafter, an image reading apparatus according to an embodiment of the present invention will be described. In the present embodiment, an example in which the image reading apparatus is applied to a digital multifunction peripheral will be described.

<1. Overall configuration of digital multifunction device>
First, the overall configuration of the digital multi-function peripheral will be described. FIG. 1 is a perspective view showing an overall configuration of a digital multifunction peripheral according to an embodiment. For convenience of explanation, each figure is provided with coordinate axes indicating the vertical direction, the front-rear direction, and the left-right direction with reference to the state incorporated in the digital multi-function peripheral.

  The digital multifunction device 10 is functionally roughly provided with a document reading portion and an image forming portion. These functions are used under appropriate control to realize various functions such as a FAX function, a copy function, a scan function, and a print function.

  More specifically, in the digital multi-function peripheral 10, a reading unit 30 responsible for an image reading function is disposed above the recording unit 20 responsible for an image forming function.

  The recording unit 20 is configured to form a recording sheet by performing image formation, that is, a predetermined printing process on the sheet. More specifically, the recording unit 20 has a configuration in which a printing unit 24 as a recording device is disposed above at least one paper feed cassette 22. Then, after the paper stored in the paper feed cassette 22 is fed to the printing unit 24 and printed, it is discharged to the outside as recording paper.

  The reading unit 30 is configured to read an image, that is, read information on a document as image data. Here, the reading unit 30 is configured to read an original as a flat bed type (FBS) scanner and to read an original as a sheet feed type scanner. The flat bed type scanner is configured to read the original by appropriately moving the carriages 38a and 38b while the original is stationary. The sheet feed type scanner is configured to read the original by conveying the original with the carriages 38a and 38b arranged at fixed positions.

  More specifically, the reading unit 30 has a configuration in which a document pressing cover unit 40 is provided above an image reading main body unit 32 provided above the recording unit 20.

  The image reading main body 32 is configured such that a contact glass 35 and a platen glass 36 are attached to an upper surface of a substantially rectangular housing part 33 in plan view, and various elements for reading an image are accommodated in the housing part 33. It is said that.

  More specifically, a platen glass 36, which is a substantially square plate-like transparent member, is disposed on the upper surface of the housing portion 33. The platen glass 36 is formed to have a size that is wide enough to spread and place a document to be placed. A contact glass 35, which is a transparent member having a substantially rectangular plate shape, is disposed on the upper surface of the casing 33 and on one side of the platen glass 36. The contact glass 35 has a length dimension corresponding to the width of the conveyed document.

  In addition, carriages 38 a and 38 b, a light receiving unit 39, and a heater 70 are mainly provided in the housing unit 33.

  The carriages 38a and 38b are configured to be independently movable below the platen glass 36 by moving means (not shown). One carriage 38a has a reflection member such as a mirror and a light source, and irradiates light on the platen glass 36 with light from the light source and reflects light from the original on the reflection member. Guide to the carriage 38b. The other carriage 38 b has a reflecting member such as a mirror and guides light from the one carriage 38 a to the light receiving unit 39.

  When the carriage 38a on one side is moved below the platen glass 36, the other carriage 38b is moved in the same direction at a speed approximately half the movement speed of the carriage 38a. As a result, the original on the platen glass 36 can be read while the optical path length from which the reflected light from the original reaches the light receiving unit 39 via the carriages 38a and 38b is kept constant.

  The light receiving unit 39 incorporates optical means such as a lens and an image sensor such as a CCD. Then, when the reflected light from the document is guided to the main light receiving unit 39 via the carriages 38a, 38b, etc., the guided light 39L is imaged on the imaging surface of the imaging device by the optical means. Thereby, the reflected light from the document is converted into an electric signal by photoelectric conversion.

  In addition, a heater 70 and an intermediate heat radiating plate 75 are attached in the image reading main body 32. The specific configuration will be described in detail later.

  The document pressing cover unit 40 includes a document pressing unit 40 a and an automatic document conveying device 45. The document pressing cover portion 40 is attached to one side of the image reading main body portion 32 through a hinge portion 31 so as to be freely opened and closed. Then, with the document pressing cover portion 40 closed, the document pressing portion 40 a covers the upper part of the platen glass 36, and the automatic document feeder 45 is disposed above the contact glass 35.

  When reading a document by the sheet feed method, the automatic document feeder 45 transports the document so as to contact the contact glass 35 while the carriage 38a is stationary below the contact glass. The document is read.

  An operation panel 50 is provided on one side (front) of the reading unit 30. Various switches 52 and a touch panel 54 are provided on the operation panel 50. Various switches 52 accept various operations on the digital multi-function peripheral 10. The touch panel 54 accepts such various operations and also functions as a display unit that displays the operation status, operation contents, and the like of the digital multi-function peripheral 10.

<2. Details of heater and intermediate heat sink mounting configuration>
A configuration for attaching the heater 70 and the intermediate heat radiating plate 75 in the image reading main body 32 will be described in detail. FIG. 2 is a perspective view showing the mounting configuration of the heater and the intermediate heat sink in the resin chassis, and FIG. 3 is an exploded perspective view showing the mounting configuration of the heater and the intermediate heat sink. It is sectional drawing which shows an attachment structure.

  As described above, the image reading main body 32 has the contact glass 35 and the platen glass 36 attached to the upper surface of the casing 33, and the carriage 38a as a document reading optical system mechanism for reading the document in the casing 33. , 38b and the light receiving part 39 are accommodated.

  The housing portion 33 includes a resin chassis 60. The resin chassis 60 is a part that constitutes the basic foundation of the housing portion 33, and the resin housing 60 as a whole is attached to the resin chassis 60 with other resin members, reinforcing metal parts, and the like. May be.

  The resin chassis 60 is formed in a flat bowl shape that opens upward. More specifically, the resin chassis 60 has a configuration in which four side plate portions 64 are erected so as to surround four sides around the substantially square bottom surface plate portion 62. The bottom plate 62 and the side plates 64 are constituent plates constituting the resin chassis 60, and the bottom plate 62 is a bottom constituent plate. In the present embodiment, an extending portion 61 is formed on one side portion (rear side portion) of the resin chassis 60, and a substrate and wiring are appropriately attached to the extending portion 61.

  As shown in FIG. 3, ribs 63 and 63a are formed on the inner surface (upper surface) of the bottom plate portion 62. The rib portions 63 and 63a are ridge portions formed in linear protrusions extending along the vertical and horizontal directions (here, left and right front and rear). ing. The rib portion 63 has a role of reinforcing the bottom plate portion 62 so as to maintain a planar shape. In particular, a rib portion 63 a extending so as to surround a substantially rectangular region is formed at a substantially central portion of the bottom plate portion 62. Screw fixing portions 63b having screw holes 63h into which the screws S1 can be screwed are formed at the four corners of the rib portion 63a. And the intermediate | middle heat sink 75 mentioned later is attached and fixed to this rib part 63a using the said screw fixing | fixed part 63b.

  A heater 70 is fixed to the resin chassis 60 via an intermediate plate 80 and an intermediate heat dissipation plate 75.

  The heater 70 is a member that generates heat, and its main purpose is to heat the inside of the resin chassis 60 to prevent dew condensation on its internal components. Here, the heater 70 is formed in a substantially rectangular parallelepiped shape that is substantially rectangular in plan view. Such a heater 70 is formed, for example, by packaging a heating resistor with a heat-resistant resin or the like. Then, heat is generated by energizing the heater 70 through the wiring 71 drawn out from the heater 70.

  The interposed plate 80 is a member for attaching the heater 70 to the intermediate heat radiating plate 75. The interposed plate 80 is made of spring steel or aluminum plate used as a spring, and such spring steel or aluminum plate is more excellent in thermal conductivity than the resin chassis 60.

  More specifically, the interposition plate 80 is a member formed by appropriately punching and bending a substantially square plate-shaped spring steel plate or aluminum plate. That is, the interposition plate 80 is bent so that the side plate portion 82 rises upward from one side portion of the main plate portion 81 having a substantially rectangular shape in plan view that has a larger extent than the size of the heater 70 in plan view. It is made into a shape. In addition, a state in which one side portion of the heater 70 is brought into contact with the side plate portion 82, and a lower surface that is one main surface of the heater 70 is placed in contact with an upper surface that is one main surface of the main plate portion 81. Thus, heater holding pieces 81P are cut and raised at appropriate intervals along a line surrounding the other three sides of the heater 70 (see a two-dot chain line on the main plate portion 81 in FIG. 3). Then, in a state where the heater 70 is disposed at a predetermined position on the main plate portion 81, a portion of the heater holding piece 81P that exceeds the heater 70 in an upward direction is bent toward the upper surface side of the heater 70, whereby the heater 70 is moved to its lower surface. Is fixedly attached to the intervening plate 80 in a state of being in surface contact with the upper surface of the main plate portion 81.

  The main plate portion 81 is formed with a screw insertion hole 81h through which the screw S2 can be inserted. Here, a screw insertion hole 81 h is formed at a middle portion in the longitudinal direction of the main plate portion 81 and at a side position of the heater 70.

  The intermediate heat radiating plate 75 is a member that is formed of a material that has better thermal conductivity than the resin chassis 60 and is fixed to the resin chassis 60 in the resin chassis 60. More specifically, the intermediate heat radiating plate 75 is a plate member formed of a material having excellent thermal conductivity, and is a metal plate member here. The intermediate heat radiating plate 75 is formed of a substantially square plate-like member in plan view having a larger extent than the substantially square region surrounded by the rib portion 63a. Further, the size of the intermediate heat radiating plate 75 in plan view is larger than the size of the heater 70 in plan view. In other words, the projected area of the intermediate heat radiating plate 75 on the bottom plate 62 is larger than the projected area of the heater 70 on the bottom plate 62.

  A screw hole 76h into which the screw S2 can be screwed is formed in a portion of the intermediate heat radiating plate 75 where the screw insertion hole 81h of the interposition plate 80 is provided.

  Then, by inserting the screw S2 into the screw insertion hole 81h of the interposed plate 80 and screwing it into the screw hole 76h, the interposed plate 80 is screwed and fixed to the intermediate heat radiating plate 75. In this state, the lower surface that is the other main surface of the interposition plate 80 is in surface contact with the upper surface that is one main surface of the intermediate heat radiating plate 75. In particular, since the intervening plate 80 is formed of spring steel or aluminum plate, even if there is a slight curvature in the burr at the periphery of the screw hole 76h or the intervening plate 80, the interposer plate 80 is in surface contact with the upper surface of the intermediate heat radiating plate 75. Thus, the interposed plate 80 itself is elastically deformed. Accordingly, the interposition plate 80 can be brought into surface contact with the upper surface of the intermediate heat dissipation plate 75 more reliably. As a result, the heater 70 is attached to the intermediate heat radiating plate 75 via the interposed plate 80.

  Further, screw insertion holes 77h into which the screws S1 can be inserted are formed at portions corresponding to the screw holes 63h in the four corners of the intermediate heat dissipation plate 75. Then, the intermediate heat radiating plate 75 is disposed on the rib portion 63a surrounding the substantially square region, and four screws S1 (only three are shown in FIG. 3) are inserted into the screw insertion holes 77h, respectively. The intermediate heat radiating plate 75 is attached and fixed to the inside of the bottom plate portion 62 of the resin chassis 60 by being screwed to 63h. In other words, the heater 70 is attached and fixed to the inner side of the bottom plate 62 of the resin chassis 60 via the intervening plate 80 and the intermediate heat radiating plate 75 and substantially at the center thereof.

  In this state, a gap C corresponding to the height dimension of the rib portion 63a is provided between the intermediate heat dissipation plate 75 and the upper surface of the bottom plate portion 62 (see FIG. 4). The gap C is a space in which the upper and lower sides are sealed by the intermediate heat radiating plate 75 and the bottom plate portion 62 and the four sides are sealed by the rib portion 63a. Note that the sealing here does not necessarily need to be sealed in a sealed state, and it is sufficient that the air in the gap C is blocked to the extent that it does not easily flow.

  One of the screws S1 is screwed in a state where the annular portion 78a of the crimp terminal 78 is inserted, and the crimp terminal 78 is connected between the screw head of the screw S1 and the intermediate heat dissipation plate 75. Sandwiched between them. The electric wire 79 drawn out from the crimp terminal 78 is connected to the earth body in the digital multi-function peripheral 10. Here, the electric wire 79 is grounded to the casing of the light receiving unit 39. Thereby, the intermediate | middle heat sink 75 is earth | grounded.

  According to the image reading apparatus configured as described above, the intermediate heat radiating plate 75 formed of a material (here, made of metal) having higher thermal conductivity than the resin chassis 60 and fixed in the resin chassis 60. And the heater 70 attached to the intermediate heat radiating plate 75, the heat of the heater 70 is transmitted to the intermediate heat radiating plate 75 and is also dissipated from the surface of the intermediate heat radiating plate 75. For this reason, for example, compared with the case where the heater 70 is installed alone, the resin chassis 60 can dissipate heat in a larger area without concentrating the heat, and the resin chassis 60 is warmed as much as possible. Can do. Thereby, effective dew condensation measures can be taken for each part housed in each part in the resin chassis 60.

  Further, since the size of the intermediate heat radiating plate 75 in plan view is larger than the size of the heater 70 in plan view, the resin chassis 60 can be more effectively warmed as a whole.

  In addition, since the intermediate heat radiating plate 75 is made of metal, the heat generated by the heater 70 is transmitted particularly efficiently, and the resin chassis 60 can be more effectively warmed as a whole.

  Moreover, since the resin chassis 60 is made of resin, there is an advantage that it is difficult to feel heat even if the installation portion of the heater 70 is touched from the back side.

  A platen glass 36 is installed on the upper part of the resin chassis 60, and carriages 38a and 38b and a light receiving unit 39 are accommodated in the resin chassis 60 as an optical system mechanism for reading a document. The effect of condensation is significant. Therefore, an effective and important dew condensation measure can be realized by heating the resin chassis 60 using the heater 70 and the intermediate heat radiating plate 75 as described above.

  In addition, since the gap C is provided between the bottom plate 62 that is a component plate constituting the resin chassis 60 and the intermediate heat radiating plate 75, the gap C radiates heat generated by the heater 70 to the outside. Plays the role of insulation. For this reason, the heat generated by the heater 70 is not easily radiated to the outside of the resin chassis 60, and the entire interior of the resin chassis 60 can be efficiently warmed.

  And since the clearance gap C is sealed from the circumference | surroundings, the heat insulation effect is higher. Therefore, the entire interior of the resin chassis 60 can be warmed more efficiently.

  Furthermore, since the rib portion 63a that reinforces the bottom plate portion 62 is used as a member that seals the gap C, the rib portion 63a can realize the reinforcing function of the bottom plate portion 62 and the sealing function. For this reason, a structure can be made comparatively simple.

  Further, since the intermediate heat radiating plate 75 is grounded, the intermediate heat radiating plate 75 releases electromagnetic shielding, for example, electromagnetic waves generated by the heater 70 to other parts of the digital multi-function peripheral 10 and outside the digital multi-function peripheral 10. Can be electromagnetically shielded.

  In addition, the heater 70 is attached to the intermediate heat radiating plate 75 via an intervening plate 80. For this reason, the attachment structure for fixing the heater 70 to the interposition board 80 can be built. Here, the heater holding piece 81P is cut and raised on the intervening plate 80, and the heater 70 is fixed in a holding shape by the heater holding piece 81P. The reason why such a mounting structure is adopted is that a screwing structure cannot be formed in the heater 70 itself. If such a heater holding piece 81P is formed on the intermediate heat radiating plate 75, the heat radiating area of the intermediate heat radiating plate 75 is reduced, and the sealing performance of the gap C is impaired. Therefore, the attachment structure of the heater 70 such as the heater holding piece 81P is formed on the interposition plate 80, and the interposition plate 80 is attached to the intermediate heat dissipation plate 75, so that the functions of the intermediate heat dissipation plate 75 and the gap C are greatly impaired. The heater 70 can be attached without any problem.

  Moreover, since the interposition plate 80 is formed of spring steel or aluminum plate, the interposer plate 80 is elastically deformed along the upper surface of the intermediate heat dissipating plate 75 so that the lower surface of the interposer plate 80 is changed by the upper surface of the intermediate heat dissipating plate 75. Surface contact can be ensured. Therefore, it is possible to improve the adhesion between the intermediate plate 80 and the intermediate heat radiating plate 75 and efficiently transfer heat from the heater 70 to the intermediate heat radiating plate 75 via the intermediate plate 80.

  Furthermore, since the heater 70 is provided in the substantially center part of the bottom face plate part 62 which comprises the resin chassis 60, the circumference | surroundings can be efficiently warmed from the substantially center part of the bottom face plate part 62.

<3. Modification>
Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made.

  For example, in the above-described embodiment, the heater 70 and the intermediate heat radiating plate 75 are mounted and fixed in the resin chassis 60 in which the document reading optical system mechanism for reading an image is accommodated. The heater 70 and the intermediate heat dissipation plate 75 may be attached and fixed in a resin chassis that houses the drive mechanism.

  Moreover, in the said embodiment, as shown in FIG. 5, you may form the intermediate | middle heat sink 175 in a waveform. Thereby, the heat radiation area by the intermediate heat radiation plate 175 can be increased, and the inside of the resin chassis 60 can be more effectively warmed up as a whole. In addition, the intermediate | middle heat sink 175 may be partially formed in the wave shape, or may be formed in the wave shape entirely. However, it is preferable that the portion to which the heater 70 or the interposition plate 80 is attached is formed in a flat shape in accordance with the shape of the heater 70 or the interposition plate 80. But when comprised in this way, it is good to insert an elastic member between a wavelike part and a rib. Thereby, the sealing performance of the gap C described above can be ensured, and heat dissipation to the outside of the apparatus can be more effectively blocked.

  Further, the intermediate plate 80 may be omitted, and the heater 70 may be directly fixed to the intermediate heat radiating plate 75. As a fixing structure in this case, a structure in which the heater 70 is fixed so as to be in pressure contact with the intermediate heat radiating plate 75 by a screwed and fixed bracket or the like, or a screw insertion hole is formed in the heater 70 and screwed to the intermediate heat radiating plate 75. Various configurations such as a configuration for fixing and a configuration for fixing the heater 70 with an adhesive may be employed.

  Further, the gap C is not essential, and the intermediate heat radiating plate 75 may be fixed so as to be in surface contact with the bottom plate 62.

  Further, in the configuration in which the gap C is provided, the gap C is not necessarily sealed.

  Further, in the configuration in which the gap C is sealed, it may be sealed by a portion other than the rib portion 63a. For example, the four sides of the intermediate heat radiating plate 75 may be bent toward the bottom plate 62 and the four sides of the gap C may be sealed with the bent portions. Moreover, you may make it seal with the separate member surrounding 4 sides of the clearance gap C. FIG.

  Moreover, in this embodiment, although the heater 70 and the intermediate | middle heat sink 75 are attached to the bottom face board part 62, it is not necessarily required, For example, you may attach to the side board part 64. That is, the heater 70 and the intermediate heat radiating plate 75 are fixed in the resin chassis 60 by being fixed to the resin chassis 60 or by being fixed to the resin chassis 60 through other members. It only has to be.

  Further, in the present embodiment, an example in which the present invention is applied to a digital multi-function peripheral having various functions such as a FAX function, a copy function, a scan function, and a print function has been described, but the present invention is not necessarily limited thereto. That is, the present invention can be applied to various image reading apparatuses such as a scanner apparatus, a FAX apparatus, and a copying apparatus that perform image reading.

1 is a perspective view illustrating an overall configuration of a digital multifunction peripheral according to an embodiment. It is a perspective view which shows the attachment structure of the heater and intermediate | middle heat sink in a resin-made chassis. It is a disassembled perspective view which shows the attachment structure of the heater and an intermediate | middle heat sink. It is sectional drawing which shows the attachment structure of the heater and an intermediate | middle heat sink. It is a disassembled perspective view which shows the modification of an intermediate | middle heat sink.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Digital compound machine 32 Image reading main-body part 33 Case part 38a, 38b Carriage 39 Light-receiving part 60 Resin chassis 62 Bottom plate part 63, 63a Rib part 70 Heater 75,175 Intermediate heat sink 78 Crimp terminal 79 Electric wire 80 Interposition board C Gap

Claims (13)

A resin chassis formed like a bowl;
An intermediate heat sink formed of a material having higher thermal conductivity than the resin chassis, and fixed in the resin chassis,
A heater attached to the intermediate heat sink;
An image reading apparatus comprising: The image reading apparatus according to claim 1,
The size of the said intermediate | middle heat sink in the planar view is larger than the magnitude | size in the planar view of the said heater, The image reading apparatus characterized by the above-mentioned. The image reading apparatus according to claim 1 or 2,
The image reading apparatus, wherein the intermediate heat radiating plate is made of metal. The image reading apparatus according to any one of claims 1 to 3,
Platen glass is installed on top of the resin chassis,
An image reading apparatus, wherein a document reading optical system mechanism for reading a document placed on the platen glass is accommodated in the resin chassis. An image reading apparatus according to any one of claims 1 to 4,
An image reading apparatus, wherein the intermediate heat radiating plate is attached so as to provide a gap with a component plate constituting the resin chassis. The image reading apparatus according to claim 5,
An image reading apparatus, wherein the gap is sealed. The image reading apparatus according to claim 6,
2. The image reading apparatus according to claim 1, wherein the gap is sealed by a rib portion that reinforces a component plate constituting the resin chassis. An image reading apparatus according to any one of claims 1 to 7,
The image reading apparatus, wherein the intermediate heat radiating plate is grounded. An image reading apparatus according to any one of claims 1 to 8,
An image reading apparatus, wherein the intermediate heat radiating plate is formed in a wave shape. The image reading apparatus according to claim 1,
The image reading apparatus, wherein the heater is attached to the intermediate heat radiating plate via an intervening plate. The image reading apparatus according to claim 10,
The image reading apparatus, wherein the interposition plate is made of spring steel. The image reading apparatus according to claim 10,
The image reading apparatus, wherein the interposition plate is formed of an aluminum plate. An image reading apparatus according to any one of claims 1 to 12,
The image reading apparatus according to claim 1, wherein the heater is provided at a substantially central portion of a bottom surface constituting plate constituting the resin chassis.

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