JP2018164250A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that can efficiently dissipate heat generated by each heat source and reduce influence of heat generated by each heat source on other heat sources by dividing heat generated by a plurality of heat sources and dissipating the heat.SOLUTION: The electronic apparatus having a plurality of heat sources, includes: a first duct 82 disposed between a first heat source 81 and a second heat source 83 and radiating heat of the first heat source 81 to the outside; and a second duct 84 which is disposed at a position to sandwich the first heat source 81 between the second duct and the first duct 82 and dissipates heat of the second heat source 83 to the outside.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electronic apparatus having a plurality of heat sources.

  In a digital video camera, a digital still camera, and the like, due to a recent demand for miniaturization, there is an arrangement space for a sensor circuit board on which an image sensor is mounted and a main circuit board on which electronic components for processing control signals and image signals are mounted. It becomes smaller and the distance between each substrate is closer. In addition, the mounting density of electronic components mounted on a circuit board is also increasing due to the progress of board mounting technology.

  On the other hand, the power consumption of the image sensor increases and the amount of heat generation increases as the image quality and the frame rate increase. Since the performance of an image sensor generally decreases as the temperature rises, it is necessary to dissipate heat generated by the image sensor. In addition, it is necessary to suppress heat generated in the electronic components mounted on the main circuit board from being transmitted to the image sensor and increasing the temperature of the image sensor. In recent years, the amount of heat generated by a recording medium has increased as the writing speed to the recording medium has increased.

  Conventionally, as a heat dissipation measure for an image sensor and a main circuit board, a heat radiating duct having an air flow passage that does not communicate with the inside of the housing is provided to exhaust the air taken into the housing from the intake port to the outside of the housing by a fan from the exhaust port. An imaging device has been proposed (Patent Document 1).

  In this proposal, the heat radiating duct is disposed between the back surface of the light receiving surface of the image sensor and the main circuit board on which electronic components are mounted, and the member on the image sensor side has a higher thermal conductivity than the member on the main circuit board side. It is formed with a high member.

JP 2013-93697 A

  However, in Patent Document 1, the heat radiating duct needs to radiate the heat of the main circuit board and the heat of the image sensor. For this reason, when the amount of heat generated by the main circuit board increases, it may be possible that not all heat can be dissipated to the outside, but the heat of the main circuit board is transmitted to the image sensor and the temperature of the image sensor rises.

  In addition, it is assumed that the temperature of the recording medium or the like disposed inside the housing rises due to the heat of the main circuit board not being sufficiently dissipated. However, in Patent Document 1, the heat radiating duct needs to dissipate heat of the main circuit board and heat of the image sensor, and if the heat generation amount of the main circuit board increases, it cannot dissipate all the heat and is disposed inside. There is a problem that the temperature of the recorded recording medium or the like increases.

  Accordingly, a first object of the present invention is to divide and dissipate heat generated by a plurality of heat sources, thereby efficiently dissipating heat generated from each heat source to other heat sources due to heat generated by each heat source. An object of the present invention is to provide an electronic device that can reduce the influence of the above.

  A second object of the present invention is to provide an electronic device that can efficiently dissipate the heat of a recording medium while dividing the heat generated from each heat source.

  In order to achieve the above object, the present invention provides an electronic apparatus having a plurality of heat sources, which is disposed between a first heat source and a second heat source, and dissipates heat of the first heat source to the outside. A duct and a second duct disposed at a position sandwiching the first heat source between the first duct and the second duct for radiating heat of the second heat source to the outside are provided.

  In addition, the present invention is an electronic apparatus having a plurality of heat sources, and is electrically and thermally connected to a recording medium, a media substrate as a heat source, and the media substrate, and is parallel to the media substrate and the recording medium. A holding member for holding the recording medium having a flat surface portion, and a heat radiating duct having an intake port and an exhaust port. The duct and the flat surface portion of the holding member are sealed via an elastic member. It is characterized by being stopped.

  In addition, the present invention is an electronic apparatus having a plurality of heat sources and a plurality of ducts, and sandwiches the first heat source between the first duct that radiates the heat of the first heat source to the outside and the first duct. A second duct that is disposed at a position and radiates heat of the second heat source to the outside, and a third duct that is disposed between the first heat source and the third heat source and radiates heat of the third heat source to the outside. The first heat source and the second heat source extend in a direction perpendicular to each other and are arranged substantially parallel to each other, the third heat source is arranged in a direction perpendicular to the first heat source, and the first heat source The second duct and the third duct are connected to a duct.

  According to the present invention, the heat generated by a plurality of heat sources is divided and dissipated to efficiently dissipate the heat generated by each heat source, thereby reducing the influence of the heat generated by each heat source on other heat sources. An electronic device that can be provided can be provided.

  In addition, according to the present invention, it is possible to provide an electronic device that can efficiently dissipate the heat of the recording medium while dividing the heat generated from each heat source.

(A) is the perspective view which looked at the interchangeable-lens digital video camera which is 1st Embodiment of the electronic device of this invention from the front side, (b) looked at the digital video camera shown to (a) from the back side. FIG. It is a disassembled perspective view of a camera main body. It is sectional drawing which follows the left-right direction of a camera main body. It is sectional drawing which follows the optical axis direction of a camera main body. It is a perspective view which shows the thermal radiation structure of a 2nd duct unit. It is a disassembled perspective view of a main unit. It is a figure which shows a main circuit board. (A) is the figure which looked at the 2nd duct from the fin side, (b) is the A section enlarged view of (a). It is an image figure explaining the temperature boundary layer of the air which flows between fins. It is the elements on larger scale of a main circuit board and a 2nd duct. It is the disassembled perspective view which looked at the thermal radiation unit of the image pick-up element from the front side of the camera body. (A) is the disassembled perspective view which looked at the mount member and the image pick-up element unit from the front side of the camera main body, (b) is the disassembled perspective view seen from the back side of (a). (A) is the disassembled perspective view which looked at the image pick-up element unit and the 1st duct unit from the front side of the camera main body, (b) is the disassembled perspective view seen from the back side of (a). It is principal part sectional drawing of the assembly of an image pick-up element unit and a 1st duct unit. It is principal part sectional drawing in alignment with the optical axis direction of a mount member, an image pick-up element unit, and a 1st duct unit. It is a perspective view which shows the holding member of a 1st duct unit, a heat radiating member, a electrically-conductive member, and a main circuit board. It is principal part sectional drawing of the assembly of the element thermal radiation member of a 1st duct unit, an electrically-conductive member, a holding member, a thermal radiation member, a thermal radiation sheet, and a main circuit board. (A) is the perspective view which looked at the cooling unit from the back side of the camera body, (b) is an exploded perspective view of the cooling unit shown in (a). (A) is the perspective view which looked at the cooling unit from the front side of the camera main body, (b) is the disassembled perspective view of the cooling unit shown to (a). (A) is a figure which shows a media board | substrate, a 3rd duct unit, and an air blower, (b) is the sectional view on the AA line of (a). It is an expansion perspective view of a 3rd duct unit. (A) is the perspective view which looked at the digital video camera of an interchangeable lens type which is 2nd Embodiment of the electronic device of this invention from the front side, (b) is the digital video camera shown to (a) seen from the back side. FIG. It is the perspective view which looked at the camera main body in the state where the display panel part was opened from the back side. It is the perspective view which looked at the state which connected the external interface terminal of the external connection cable to the external interface part of the camera main body from the back side of the camera main body. It is principal part sectional drawing of the back surface finger hook part vicinity of a camera main body. It is a perspective view which shows the state in which the photographer has opened the display panel part by putting a finger on the back finger hook part. It is a disassembled perspective view of a camera main body. It is sectional drawing which follows the direction orthogonal to the optical axis seen from the back side of the camera main body. It is sectional drawing which follows the optical axis direction seen from the upper surface side of the camera main body. It is a perspective view of the main unit which integrated the 1st duct unit, the main circuit board, and the air blower. It is the perspective view which looked at the main unit shown in FIG. 30 from the back side. It is a disassembled perspective view of the main unit shown in FIG. It is a perspective view of the 1st duct. It is the perspective view seen from the back side of the camera body of the 2nd duct unit and an image sensor substrate unit. It is the disassembled perspective view seen from the front side of the camera main body of a 2nd duct unit and an image pick-up element substrate unit. It is a perspective view around the 3rd duct unit, the 1st recording media unit, and the 2nd recording media unit. FIG. 4 is an exploded perspective view around a third duct unit, a first recording media unit, and a second recording media unit. It is principal part sectional drawing which shows the thermal radiation structure around a 3rd duct unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1A is a perspective view of an interchangeable lens digital video camera according to a first embodiment of the electronic apparatus of the present invention as seen from the front side, and FIG. 1B is a digital video shown in FIG. It is the perspective view which looked at the camera from the back side. In the present embodiment, a digital video camera which is an example of an imaging device is illustrated as the electronic apparatus of the present invention, but the present invention is not limited to this.

  As shown in FIG. 1, the digital video camera of the present embodiment (hereinafter referred to as a camera) has a mount member 2 on which a lens unit (not shown) is detachably mounted on the front side of the camera body 1, and a mount member. A front cover unit 3 that covers 2 etc. is provided. A left cover unit 4 is provided on the left side when viewed from the front side of the camera body 1.

  The left cover unit 4 has a second inlet 41 for taking outside air into a first duct unit 82 (see FIG. 2) described later and a second inlet 41 for taking outside air into a second duct unit 84 (see FIG. 2) described later. One intake port 42 is provided. In addition, the left cover unit 4 is provided with a grip attachment portion 43 to which a grip unit (not shown) for holding the camera body 1 during photographing is detachably attached. The grip unit is provided with keys for starting / stopping photographing.

  An upper surface cover unit 5 is provided on the upper surface portion of the camera body 1, and an accessory attachment screw portion 51 for attaching a handle (not shown), a display panel (not shown) or the like to the upper cover unit 5 in the optical axis direction. Are formed at two locations apart from each other. Further, a viewfinder 52 is provided on the back surface side of the camera body 1 of the top cover unit 5.

  A right cover unit 6 is provided on the right side when viewed from the front side of the camera body 1, and the right cover unit 6 includes a right operation key 61, a power dial 62, and a first recording medium 63 (see FIG. 2). Is provided.

  The right operation key 61 is a key used at the time of shooting and playback, and a function can be assigned to each key. The function allocation includes, for example, start / stop of shooting, peaking, partial enlargement of the shooting angle of view, switching of the filter density of the ND unit, change of the rotation speed of the blower, and the like. The power dial 62 can turn on / off the power of the camera body 1 by a turning operation. In the power-on state, a subject light beam that passes through the lens unit and forms an image on an image sensor (not shown) is captured by the image sensor. Is photoelectrically converted. The image signal photoelectrically converted by the image sensor is converted into image data by an image processing unit of a main circuit board 83 (see FIG. 2), which will be described later, and displayed as an image on the viewfinder 52, an external monitor, or the like.

  The first recording medium 63 is a main recording medium in the camera, and the right cover unit 6 is provided with a first lid member 64 for protecting the first recording medium 63 so as to be opened and closed. In the opened state of the first lid member 64, the first recording medium 63 can be inserted into and removed from the camera body 1. The first recording medium 63 is inserted and removed in a direction substantially perpendicular to the surface of the right cover unit 6.

  In addition, when the first lid member 64 is closed, the first recording medium 63 attached to the camera body 1 can be accessed, and the image is picked up by the image sensor and digitally processed by the image processing unit of the main circuit board 83. Image data can be recorded. In the present embodiment, the first recording medium 63 is a memory card such as a Cfast (registered trademark) card, and is the recording medium that generates the most heat among the plurality of recording media mounted on the camera body 1. Further, the right cover unit 6 is provided with an exhaust port 65 for exhausting air to the outside by a blower 85 (see FIG. 2) described later. The exhaust port 65 is located above and below the optical axis of the camera body 1. They are arranged almost symmetrically.

  A back cover unit 7 is provided on the back side of the camera body 1, and a battery chamber 78 in which a battery 71 for supplying power to the camera body 1 is detachably attached is provided in the lower stage of the back cover unit 7. It has been. The middle part of the back cover unit 7 includes a back operation key 72, an audio operation key 73 for selecting input sound and setting a volume level, a second recording medium 74 capable of recording data, and a second recording medium 74 covering the second recording medium 74. Two lid members 75 are provided.

  The second recording medium 74 can record data independently, and can record the same data simultaneously with the first recording medium 63. Further, in the present embodiment, two second recording media 74 are arranged, and it is possible to simultaneously record on the second recording media 74, and the recording media can be selected.

  Further, the back cover unit 7 is covered with a lid in the drawing and is not shown in the figure, but a BNC connector for outputting an SDI signal, an HDMI (registered trademark) connector for video output, and a power connector for power supply An external interface such as a headphone connector for audio output is arranged. Further, the rear cover unit 7 is provided with a third air intake port 77 for taking outside air into a third duct unit 86 described later, located on the side of the viewfinder 52.

  Next, the internal structure of the camera body 1 will be described with reference to FIG. FIG. 2 is an exploded perspective view of the camera body 1. In FIG. 2, illustration of the cover units 4 to 6 is omitted.

  As shown in FIG. 2, the camera body 1 has a mount member 2 disposed on the front side, and an ND unit 80 disposed on the back side of the mount member 2. In the present embodiment, an electric ND unit 80 is used, and a plurality of density ND filters can be electrically replaced by operating the right operation key 61.

  On the back side of the ND unit 80, an image sensor unit 81 in which the image sensor is mounted on the sensor circuit board is disposed. In the present embodiment, the image sensor unit 81 is a first heat source that generates heat during photographing. A first duct unit 82 is disposed on the back side of the image sensor unit 81. The details of the first duct unit 82 will be described later, and the second intake port 41 and the exhaust port 65 described above are connected to the first duct unit 82. There is a vent. The image sensor unit 81 is cooled by transferring heat generated in the image sensor unit 81 to the first duct unit 82. Here, the mount member 2, the ND unit 80, the imaging element unit 81, and the first duct unit 82 are integrated to form a part of the front cover unit 3.

  A main circuit board 83 is arranged on the back side of the first duct unit 82. The main circuit board 83 is a board that controls the camera body 1 and accessories connected to the camera body 1, and a plurality of heat sources are provided on the main circuit board 83. In the present embodiment, the main circuit board 83 is a board that consumes the most power in the camera body 1 and generates heat. In the present embodiment, the main circuit board 83 is used as the second heat source.

  A second duct unit 84 is disposed on the back side of the main circuit board 83. As will be described in detail later, the second duct unit 84 is provided with a ventilation path that connects the first intake port 42 and the exhaust port 65 described above. The main circuit board 83 is cooled by transferring heat generated in the main circuit board 83 to the second duct unit 84. A blower 85 is disposed on the back side of the second duct unit 84. Here, a unit in which the main circuit board 83, the second duct unit 84, and the blower 85 are integrated is referred to as a main unit.

  A third duct unit 86 is disposed on the back side of the blower 85, and a recording media substrate 87 is disposed on the back side of the third duct unit 86. A connector for connecting the first recording medium 63 to the camera body 1 is mounted on the recording medium substrate 87. Although details will be described later, the third duct unit 86 is provided with a vent hole for connecting the third intake port 77 and the exhaust port 65 described above.

  Further, as described above, the first recording medium 63 generates heat when data is recorded. Therefore, the heat generated in the first recording medium 63 is transferred to the third duct unit 86 to transfer the first recording medium 63. As a result, the recording media substrate 87 is cooled. In the present embodiment, the recording media substrate 87 is the third heat source. The third duct unit 86 and the recording media substrate 87 are fixed to the back cover unit 7 and constitute a part of the back cover unit 7.

  Next, the flow of air generated by the blower 85 will be described with reference to FIGS. 3 and 4. FIG. 3 is a cross-sectional view of the camera body 1 along the left-right direction. FIG. 4 is a cross-sectional view of the camera body 1 along the optical axis direction. Note that the arrows in FIGS. 3 and 4 indicate the flow of air generated by the blower 85.

  As shown in FIG. 3, when the blower 85 is driven, external air is taken into the camera body 1 from the first air inlet 42, and the taken-in air passes through the second duct unit 84 to the blower 85. It is captured. At the same time, external air is also taken into the camera body 1 from the second air inlet 41, and the taken air is taken into the blower 85 through the first duct unit 82. At the same time, as shown in FIG. 4, external air is also taken into the camera body 1 from the third intake port 77, and the taken-in air is taken into the blower 85 through the third duct unit 86. Then, air taken into the camera body 1 from the three air inlets 42, 41, 77 is exhausted to the outside through the exhaust port 65 by the blower 85.

  Here, the image pickup device unit 81, the first duct unit 82, the main circuit board 83, the second duct unit 84, and the recording media board 87 are arranged so as to be substantially parallel and orthogonal to the optical axis. ing. Further, the second air inlet 41, the first air inlet 42, and the air outlet 65 are disposed to face each other in the left-right direction of the camera body 1.

  The heat of the image sensor unit 81 (first heat source) is transferred to the first duct unit 82 and radiated, and the heat of the main circuit board 83 (second heat source) is transferred to the second duct unit 84. To dissipate heat. The heat of the recording media substrate 87 (third heat source) is transferred to the third duct unit 86 and radiated.

  In addition, since the first duct unit 82 is disposed between the image sensor unit 81 (first heat source) and the main circuit board 83 (second heat source), the heat of the main circuit board 83 having a large heat generation amount is captured by the image sensor. Transmission to the unit 81 can be prevented. Further, a second duct unit 84 is disposed between the main circuit board 83 (second heat source) and the recording media board 87 (third heat source), and a third duct unit 84 is disposed between the second duct unit 84 and the recording media board 87. A duct unit 86 is arranged. For this reason, it is possible to prevent the heat of the main circuit board 83 that generates a large amount of heat from being transmitted to the recording media board 87.

  In this way, by dividing the heat generated by the three heat sources 83, 81, 87 by the three duct units 84, 82, 86, the heat generated by the heat sources 83, 81, 87 is efficiently radiated to each of them. It is possible to reduce the influence of heat generated by the heat sources 83, 81, 87 on other heat sources.

  Next, the structure of the second duct unit 84 will be described with reference to FIGS. 5 and 6. FIG. 5 is a perspective view showing a heat dissipation structure of the second duct unit 84. FIG. 6 is an exploded perspective view of the main unit including the main circuit board 83, the second duct unit 84, and the blower 85.

  As shown in FIGS. 5 and 6, the second duct unit 84 includes a second duct 201 and a duct lid 202, and the second duct 201 is formed of a metal member having a high thermal conductivity, and the second duct 201. Is closed with a duct lid 202 to form a ventilation path through which air does not leak.

  The main element 220 (see FIG. 7) mounted on the main circuit board 83 and the second duct 201 are arranged so as to be in contact with each other in the optical axis direction, so that the heat of the main element 220 is formed of a metal member or the like. Heat can be transferred to the second duct 201. Note that heat dissipation rubber or the like may be interposed between the main element 220 of the main circuit board 83 and the second duct 201 so that heat can be efficiently transferred to the second duct 201.

  As shown in FIG. 6, a large number of fins 210 are erected in the second duct 201. In the present embodiment, the fin 210 is formed integrally with the second duct 201, but may be fixed to the second duct 201 as a separate body using the fin 210 as a heat sink. Since many fins 210 are erected, when the air flows inside the second duct unit 84, the surface area in contact with the air can be increased, so that heat is more efficiently transmitted to the heat and radiated. At this time, by limiting the flow path of the air flowing in the second duct unit 84 by the second duct 201 and the duct lid 202, the air can be efficiently flowed and the heat radiation effect can be enhanced.

  Moreover, as shown in FIGS. 5 and 6, the duct lid 202 forms a part of the ventilation path. The duct lid 202 is provided with a lid portion 251 for forming a side surface of the ventilation path and a heat receiving portion 252 for receiving heat on the bottom surface side of the main circuit board 83. A duct hole 253 is provided on the bottom surface side of the second duct 201, and the heat receiving part 252 passes through the duct hole 253 so that the heat receiving part 252 is connected to the main circuit board 83 via the heat dissipation sheet 254. In contact. For this reason, heat on the bottom surface side of the first surface 88 of the main circuit board 83 can be transferred to the lid portion 251. The heat receiving part 252 is equivalent to an example of the heat sink of the present invention.

  Thus, when the second duct unit 84 is cooled, the duct lid 202 is cooled, and further, the bottom surface side of the first surface 88 of the main circuit board 83 is cooled. That is, by providing the ventilation path only on the upper part of the main circuit board 83, the bottom surface side of the first surface 88 of the main circuit board 83 can be cooled. As a result, it is not necessary to provide a ventilation path or fins on the bottom surface side of the second duct 201, and the camera body 1 can be reduced in size by arranging the battery chamber 78 in an empty space.

  FIG. 7A is a view of the main circuit board 83 as viewed from the back side of the camera body 1. A surface of the main circuit board 83 on the back side of the camera body 1 is a surface facing the second duct unit 84 in the optical axis direction, and this surface is a first surface 88.

  As shown in FIG. 7A, on the first surface 88 of the main circuit board 83, a main element 220, a connector 221 and the like having a relatively large amount of heat generation are mounted. The main element 220 is an image processing IC, a system control IC, or the like. In recent years, the power consumption of a camera has increased with the improvement in image quality and functionality, and the main element 220 mounted on the main circuit board 83 generates heat and becomes high temperature. When the high temperature main element 220 exceeds each guaranteed temperature, it becomes difficult to operate normally, resulting in performance deterioration and failure.

  FIG. 7B is a view of the main circuit board 83 as viewed from the front side of the camera body 1. A surface of the main circuit board 83 on the front side of the camera body 1 is a surface facing the first duct unit 82 in the optical axis direction, and this surface is a second surface 89. As shown in FIG. 7B, the second surface 89 of the main circuit board 83 is mounted with an electronic component that generates a relatively small amount of heat as compared with the main element 220 mounted on the first surface 88. Yes.

  8A is a view of the second duct 201 as viewed from the fin 210 side, and FIG. 8B is an enlarged view of a portion A in FIG. 8A. As shown in FIG. 8, the fins 210 are at least a first row of fins 230 and a second row of fins 231 arranged from the upstream side (right side in the drawing) to the downstream side (left side) with respect to the flow path direction. And is configured by fins forming a plurality of rows. The first row of fins 230 and the second row of fins 231 are each disposed in parallel to the flow path direction. Thereby, the pressure loss of the air which flows through the inside of the 2nd duct unit 84 is suppressed as much as possible, and the flow volume of the air required for heat radiation is ensured.

  In addition, the first row of fins 230 and the second row of fins 231 are arranged at a constant interval (pitch) in the direction perpendicular to the flow path direction, and the first row of fins 230 and the second row of fins 231. The fins 231 have the same pitch. Further, the fins 231 in the second row are arranged at positions offset by a half pitch in the direction perpendicular to the flow direction with respect to the fins 230 in the first row.

  FIG. 9 is an image diagram illustrating a temperature boundary layer of air flowing between the fins 210. As described above, air flows between the fins 210 of the second duct unit 84 in the flow path direction. First, when the air flows between the fins 230 in the first row, heat is transferred from the fins 230 in the first row to the air, so that the warmed air layer gradually becomes thicker toward the downstream as in the region a. Formed to be. In the region b between the fins 230 in the first row, relatively unwarmed air flows.

  Next, air flows between the fins 231 in the second row. Therefore, the unwarmed air in the region b is in contact with the upstream end of the second row of fins 231 at a position offset by a half pitch with respect to the first row of fins 230. As a result, the second row of fins 231 standing on the downstream side of the fins 210 can also come into contact with the air that has not been relatively warmed, and heat transfer to the air can be promoted. Further, when air hits the upstream end of the second row of fins 231, the air flow becomes turbulent in that portion.

  Since the turbulent flow has a higher heat transfer coefficient than the laminar flow, the heat dissipation effect is improved. Therefore, according to the fin structure of the present embodiment, the amount of heat radiation on the downstream side increases due to the use of cold air (relatively unwarmed air) and the effect of air turbulence, resulting in overall heat radiation performance. Can be raised.

  FIG. 10 is a partially enlarged view of the main circuit board 83 and the second duct 201. In the second duct unit 84, air uniformly touches the entire fin 210, so that heat can be stably transferred from the fin 210 to the air. Therefore, as described above, a plurality of fins 210 are arranged side by side at a constant pitch. Thereby, the cross-sectional area of the flow path can be made substantially constant in all the flow paths, the flow rate distribution becomes constant, and air is distributed to all the fins.

  In the present embodiment, the fin 210 includes the first row of fins 230 and the second row of fins 231, and as described above, the first row of fins 230 and the second row of fins 231 are offset by a half pitch. ing. For this reason, the fins 231 in the second row are arranged to be shifted downward by a half pitch compared to the fins 230 in the first row.

  Therefore, as shown in FIG. 10, a notch 241 corresponding to the amount of deviation is formed on the outer side of the upper side of the second duct 201 positioned above the second row of fins 231 shifted downward by a half pitch. The channel cross-sectional area of the two ducts 201 is made constant. Thereby, even in the configuration of the fins 210 offset by a half pitch as in the present embodiment, the flow path cross-sectional area can be made constant, and the heat dissipation performance is improved.

  Moreover, by notching a part of 2nd duct 201, it contributes also to size reduction and weight reduction of the 2nd duct 201 formed with the metal member with high specific gravity. Further, the connector 221 of the main circuit board 83 can be arranged in the space (area B) in the optical axis direction formed in the notch 241 of the second duct 201, and the main circuit board 83 can be downsized, and thus the camera. The main body 1 can be downsized.

  FIG. 11 is an exploded perspective view of the heat radiating unit 101 of the image sensor as viewed from the front side of the camera body 1. As illustrated in FIG. 11, the heat radiating unit 101 of the image sensor includes a mount member 2, an image sensor unit 81, a first duct unit 82, a main circuit board 83, a second duct unit 84, and a blower 85. In FIG. 11, the ND unit 80 is not shown.

  12A is an exploded perspective view of the mount member 2 and the image sensor unit 81 as viewed from the front side of the camera body 1, and FIG. 12B is an exploded perspective view of the mount member 2 and the imaging element unit 81 as viewed from the back side in FIG. .

  As illustrated in FIG. 12, the image sensor unit 81 includes an image sensor 111, a sensor circuit board 115 on which the image sensor 111 is mounted, and an element fixing member 120 to which the sensor circuit board 115 is fixed. A surface on the front side of the camera body 1 of the image sensor 111 is an imaging surface 112, and a surface on the back side is a heat conduction surface 113. The element fixing member 120 has a surface on the front side of the camera body 1 as an element bonding surface 121 and a surface on the back side as a heat conduction surface 122. The heat conduction surface 113 of the image sensor 111 is bonded to the element bonding surface 121. Thereby, the heat generated in the image sensor 111 is transmitted to the element fixing member 120 via the element bonding surface 121.

  A lens mount surface 171 on which the lens unit is detachably mounted is provided on the front side of the camera body 1 of the mount member 2, and an element fixing member 120 is fixed on the back side of the camera body 1 of the mount member 2. The The mount member 2 is fixed to the front cover unit 3 of the camera body 1.

  13A is an exploded perspective view of the image sensor unit 81 and the first duct unit 82 as viewed from the front side of the camera body 1, and FIG. 13B is an exploded perspective view of the image sensor unit 81 and the first duct unit 82 as viewed from the back side of FIG. FIG. FIG. 14 is a cross-sectional view of the main part of the assembly of the image sensor unit 81 and the first duct unit 82.

  As shown in FIG. 13, the first duct unit 82 includes an element heat radiating member 140, a holding member 150, an elastic member 160, a heat radiating member 190, and a conductive member 180. The element heat radiating member 140 has a heat conducting surface 141, a heat transfer surface 142, and a contact surface 143.

  The heat conducting surface 141 is disposed on the front side of the camera body 1 of the element heat radiating member 140 and is in contact with and fixed to the heat conducting surface 122 of the element fixing member 120. Thereby, the heat of the image sensor 111 transmitted to the element fixing member 120 is transmitted to the element heat radiating member 140 via the heat conduction surface 141. The heat transfer surface 142 is disposed on the element heat radiating member 140 on the front side of the camera body 1, and the contact surface 143 protrudes from the entire outer periphery of the element heat radiating member 140.

  As shown in FIGS. 13B and 14, the holding member 150 includes claw portions 151 a to 151 f, a first contact surface 152, a second contact surface 153, an intake port 154 a, an intake port 154 b, and an exhaust port 155 ( 16). The holding member 150 is fixed to the camera body 1, and the claw portions 151 a to 151 f are provided so as to protrude from the entire circumference of the holding member 150. The first contact surface 152 is provided on the entire circumference of the holding member 150 in parallel with the optical axis, and the second contact surface 153 is provided on the entire circumference of the holding member 150 perpendicular to the optical axis.

  The air inlet 154 a and the air inlet 154 b are openings through which air is sent to the first duct unit 82, are provided corresponding to the second air inlet 41 of the left cover unit 4, and abut against the left cover unit 4. The exhaust port 155 is an opening for sending air from the first duct unit 82, and the exhaust port 155 communicates with the second duct unit 84.

  The elastic member 160 includes claw engagement portions 161a to 161f, a first contact portion 162, a second contact portion 163, a third contact portion 164, and a flexure portion 165. The claw engaging portions 161 a to 161 f are provided so as to protrude from the entire circumference of the elastic member 160 and are engaged with the claw portions 151 a to 151 f of the holding member 150.

  The first contact portion 162 is pressed against the first contact surface 152 of the holding member 150, and the second contact portion 163 is pressed against the second contact surface 153 of the holding member 150. The third contact portion 164 contacts the contact surface 143 of the element heat radiating member 140. The flexible portion 165 is disposed between the first contact portion 162 and the third contact portion 164. Therefore, the elastic member 160 is pressed against the holding member 150 in the optical axis direction and in the direction toward the optical axis center (inward in the radial direction). However, since the elastic member 160 is only in contact with the element heat radiating member 140 in the direction toward the center of the optical axis, it can move in the optical axis direction.

  FIG. 15 is a cross-sectional view of the main part along the optical axis direction of the mount member 2, the imaging element unit 81, and the first duct unit 82. In FIG. 15, the distance in the optical axis direction from the lens mount surface 171 to the imaging surface 112 is called a flange back length. When the flange back length changes, the image pickup surface 112 of the image pickup device 111 also changes, and an image intended by the user cannot be taken. In this embodiment, the elastic member 160 is interposed between the element heat radiating member 140 and the holding member 150 in order to suppress the change in the flange back length.

  The holding member 150 including the air inlet 154a and the air inlet 154b contacting the left cover unit 4 and the element heat radiating member 140 fixed to the front cover unit 3 via the mount member 2 and the image sensor unit 81 are fixed to each other. Is different. For this reason, when an impact is applied to the camera body 1, the holding member 150 and the element heat radiating member 140 exhibit different behaviors.

  For example, when the holding member 150 moves in a direction perpendicular to the optical axis with respect to the element heat radiating member 140, an impact is applied to the element heat radiating member 140 due to elastic deformation of the flexible portion 165 of the elastic member 160. It is possible to prevent. In addition, when the holding member 150 moves in the optical axis direction with respect to the element heat radiating member 140, the third heat contact portion 164 of the elastic member 160 slides in the optical axis direction, so that the element heat radiating member 140 is shocked. It is possible to prevent joining.

  Therefore, even if the holding member 150 and the element heat radiating member 140 show different behaviors, it is possible to prevent the element heat radiating member 140 from being subjected to an impact. Therefore, even if the camera is subjected to an impact, the change in the flange back length is suppressed. It is possible to provide a highly reliable camera.

  Note that the holding member 150 is preferably a light-transmitting material for the purpose of confirming whether the elastic member 160 is normally incorporated. However, if the material is highly light transmissive, when viewed from the outside of the camera body 1, the user can see the inside of the camera body 1 through the holding member 150 and the quality is poor. It is desirable for the material to have reduced properties. Therefore, it is desirable that the holding member 150 be a translucent material in order to improve the workability of assembly and not to deteriorate the quality.

  FIG. 16 is a perspective view showing the holding member 150, the heat radiating member 190, the conductive member 180, and the main circuit board 83 of the first duct unit 82. FIG. 17 is a cross-sectional view of the main part of the assembly of the element heat radiation member 140, the conductive member 180, the holding member 150, the heat radiation member 190, the heat radiation sheet 200, and the main circuit board 83 of the first duct unit 82.

  As shown in FIGS. 16 and 17, the element heat radiating member 140, the conductive member 180, the holding member 150, the heat radiating member 190, the heat radiating sheet 200, and the main circuit board 83 are arranged in this order from the front side to the back side of the camera body 1. Has been. The heat dissipation member 190 of the main circuit board 83 is provided with a convex portion 191 that protrudes to the back side of the camera body 1. The heat radiating member 190 is fixed to the holding member 150. The conductive member 180 is in contact with and electrically connected to the heat dissipation member 190 and the element heat dissipation member 140.

  An opening 156 (see FIG. 13A) is formed in the holding member 150, and the heat dissipation member 190 is exposed from the opening 156 to the back side. The heat radiating member 190 is formed of a metal member having a high thermal conductivity, and the holding member 150 is formed of a plastic member having a thermal conductivity lower than that of the heat radiating member 190.

  Here, the air flow path of the heat dissipation unit 101 of the image sensor will be described. The air inside the second duct unit 84 and the first duct unit 82 is caused to flow by the blower 85, and the outside air sucked from the first air inlet 42 is sucked into the blower 85 after passing through the second duct unit 84, and is exhausted. It is discharged from the mouth 65. At the same time, the outside air sucked from the air inlets 154 a and 154 b passes through the first duct unit 82 and then is sucked into the blower 85 through the exhaust port 155 and discharged from the exhaust port 65.

  At this time, the conductive member 180 is arranged so that the outside air sucked from the intake port 154a and the intake port 154b easily flows in the first duct unit 82 to the exhaust port 155, and the flow path ( A broken line arrow in FIG. 16 is formed. Thus, the conductive member 180 forms a flow path in the first duct unit 82 while electrically connecting the heat radiating member 190 of the main circuit board 83 and the element heat radiating member 140.

  Thus, in this embodiment, the air in the two duct units of the second duct unit 84 and the first duct unit 82 is caused to flow by one blower 85. For this reason, the camera body 1 can be downsized without requiring a plurality of blowers.

  Next, a heat transmission path of the heat dissipation unit 101 of the image sensor will be described. As described above, the heat of the main circuit board 83 is transmitted to the fins 210 of the second duct unit 84. The heat of the image sensor 111 of the image sensor unit 81 is transmitted to the heat transfer surface 142 of the first duct unit 82. Since the main circuit board 83 and the sensor circuit board 115 are connected via a plurality of members, the main circuit board 83 and the sensor circuit board 115 have a structure in which heat transfer due to heat conduction is suppressed.

  The outside air sucked from the air inlet 154a and the air inlet 154b of the first duct unit 82 passes through the heat transfer surface 142 of the element heat radiating member 140, whereby the heat transfer surface 142 is cooled by heat transfer. Along with this, the heat conduction surface 122 of the element fixing member 120 in contact with the heat conduction surface 141 of the element heat radiating member 140 is also cooled. Further, the heat conduction surface 113 of the image sensor 111 that is in contact with the element bonding surface 121 of the element fixing member 120 is cooled. The image sensor 111 is cooled by such a heat transfer path.

  Next, the heat transfer path on the main circuit board 83 side will be described. As described above, the main circuit board 83 dissipates heat by disposing the main element 220 with high power consumption on the first surface 88 and transferring heat to the second duct 201. On the other hand, no element with high power consumption is arranged on the second surface 89 of the main circuit board 83, but heat dissipation is caused by the influence of the main element 220 with high power consumption arranged on the first surface 88. is necessary.

  Therefore, the heat of the second surface 89 of the main circuit board 83 is transmitted to the heat dissipation member 190 via the heat dissipation sheet 200. Then, the heat of the heat radiating member 190 is transferred to the air flowing through the first duct unit 82, whereby the element on the surface of the main circuit board 83 on the image sensor 111 side is cooled.

  That is, the heat of the image sensor 111 is transmitted to the air flowing in the first duct unit 82 through the element heat radiating member 140, and the heat of the element on the surface of the main circuit board 83 on the image sensor 111 side passes through the heat radiating member 190. To the air flowing through the first duct unit 82. At this time, the element heat radiating member 140 and the heat radiating member 190 are connected via the holding member 150 having a low thermal conductivity. As described above, the first duct unit 82 can cool the image sensor 111 without receiving the heat of the main circuit board 83.

  Next, a heat dissipation structure of the first recording medium 63 (hereinafter referred to as the medium 63) and the recording medium substrate 87 using the blower 85 will be described with reference to FIGS. 18 to 21, the vertical direction, the optical axis direction, and the left-right direction of the camera body 1 are defined as the Y direction, the Z direction, and the X direction, respectively. The left side (first intake port 42 side) is defined as + Y side, + Z side, and −X side, respectively.

  18A is a perspective view of the cooling unit including the media board 87, the third duct unit 86, the blower 85, the second duct 201, and the main circuit board 83, as viewed from the −Z side (the back side of the camera body 1). It is. FIG. 18B is an exploded perspective view of the cooling unit shown in FIG. 19A is a perspective view of the cooling unit shown in FIG. 18A viewed from the + Z side (the front side of the camera body 1), and FIG. 19B is an exploded perspective view of the cooling unit shown in FIG. 19A. FIG. 20A is a view of the media substrate 87, the third duct unit 86, and the blower 85 as viewed from the + Z side, and FIG. 20B is a cross-sectional view taken along the line AA of FIG. FIG. 21 is an enlarged perspective view of the third duct unit 86 as viewed from the + Z side.

  With reference to FIG.18 (b), FIG.19 (b), and FIG.20 (b), the heat dissipation structure of the media 63 and the media board | substrate 87 using the air blower 85 is demonstrated. As shown in FIG. 20B, the outside air flows into the third duct unit 86 from the third intake port 77 in the direction of the arrow by the suction force of the blower 85. The outside air that has flowed into the third duct unit 86 passes through an inflow portion 310 provided in the third duct unit 86.

  The third duct unit 86 has an opening 311 (FIG. 18B) having substantially the same size as the grounding surface 322 (FIG. 19B) provided on the surface opposite to the medium 63 of the media substrate 87. . The outside air flows from the first ground plane end 323 (FIG. 19 (b)) to the second ground plane end 324 (FIG. 19 (b)) of the ground plane 322 exposed in the third duct unit 86 through the opening 311. It flows along the surface and passes through an outflow portion 309 provided in the third duct unit 86.

  And the external air which passed the outflow part 309 passes through the 2nd discharge port 318 provided in the 3rd duct unit 86, is attracted | sucked by the air blower 85, and from the exhaust port 65 (FIG.19 (b)) of the air blower 85. It is discharged outside.

  As shown in FIG. 18B, a first elastic member 308 is provided between the media substrate 87 and the third duct unit 86, and the first elastic member 308 is an opening 311 of the third duct unit 86. The area around is sealed. In addition, a second elastic member 312 is provided between the third duct unit 86 and the blower 85, and the second elastic member 312 is a second outlet 318 of the third duct unit 86 (FIG. 19B). In addition, the periphery of the second suction portion 313 of the blower 85 is closed and sealed.

  The first elastic member 308 and the second elastic member 312 separate the flow path from the other space of the camera body 1. As shown in FIG. 20B, the Z-direction width Z1 of the flow path on the ground surface 322 of the medium 63 is narrower than the Z-direction width Z2 of the flow path near the blower 85.

  As described above, by exposing the grounding surface 322 of the media substrate 87 to the flow path from the opening 311 of the third duct unit 86, there is an effect of improving the heat dissipation performance of the media substrate 87 and the media 63. Further, by reducing the width in the optical axis direction of the flow path near the ground plane 322, the flow velocity near the ground plane 322 can be increased. This has the effect of improving the heat dissipation performance of the media substrate 87 and the media 63.

  Further, the first elastic member 308 and the second elastic member 312 isolate the space formed by the third duct unit 86, the media substrate 87, and the blower 85 from the other spaces of the camera body 1. Thereby, there exists an effect which improves dust proof and drip-proof performance. Further, the inflow portion 310 is provided in the vicinity of the first ground plane end 323 of the media substrate 87 and the outflow portion 309 is provided in the vicinity of the second ground plane end 324 of the media substrate 87, so that the outside air is substantially uniformly applied to the entire ground plane 322. Flows and has the effect of improving heat dissipation performance.

  Next, a case where the blower 85 is used as a double-sided intake will be described with reference to FIGS. 18 (b) and 19 (b). Here, the double-sided intake of the blower 85 means intake from the first suction part 325 (FIG. 19B) and the second suction part 313 (FIG. 18B) provided on both sides in the Z direction of the blower 85. Say.

  As shown in FIG. 18B, from the −Z side toward the + Z side, the media substrate 87, the first elastic member 308, the third duct unit 86, the second elastic member 312, the blower 85, the third elastic member 314, The second duct 201 and the main circuit board 83 are arranged in this order. Here, the third intake port 77 of the third duct unit 86 is in the −Z direction, the first intake port 42 of the second duct 201 is in the −X direction, and the exhaust port 65 (FIG. 19B) of the blower 85 is. It opens toward the + X direction.

  Next, with reference to FIG. 18B, an outline of sucking outside air from the first air inlet 42 and radiating the heat of the main circuit board 83 will be described. Due to the suction force of the blower 85, outside air flows into the second duct 201 from the first air inlet 42. At this time, since the main circuit board 83 and the second duct 201 are in contact with each other, the heat generated by the main circuit board 83 is transmitted to the second duct 201. Next, the outside air passes through the first discharge port 315 of the second duct 201 and flows into the first suction portion 325 (FIG. 19B) of the blower 85, and the camera body from the exhaust port 65 (FIG. 19B). 1 is discharged to the outside.

  Here, similarly to the heat dissipation structure of the media substrate 87, the first discharge port 315 and the first suction portion 325 (FIG. 19B) are covered between the blower 85 and the second duct 201 so as to cover the periphery. Three elastic members 314 are arranged. The configuration for sucking outside air from the second suction portion 313 and radiating the heat of the media substrate 87 is as described above.

  As described above, by using the blower 85 as the double-sided intake air, there is an effect that the two heat sources can be cooled with a small heat dissipation structure. Further, by combining the exhaust ports of each duct into one, there is an effect of improving the dustproof and splashproof performance. Furthermore, the first air inlet 42 and the third air inlet 77 are arranged on different surfaces, so that the heat radiation performance of the entire camera body 1 is not completely lost even if one of the air inlets is blocked. is there.

  Next, the flow rate of the outside air flowing through the second duct 201 and the third duct unit 86 will be described. The cross-sectional area of the flow path of the second duct 201 is larger than the cross-sectional area of the flow path of the third duct unit 86. Thereby, a larger amount of outside air flows in the second duct 201 than in the third duct unit 86. In the present embodiment, the main circuit board 83 is an image processing board and generates a larger amount of heat than the media board 87. Therefore, the flow rate of the second duct 201 is made larger than the flow rate of the third duct unit 86, and the main circuit board 83 is intensively cooled.

  In this way, by using the air blower 85 with double-sided intake air and making the flow path for cooling the media board 87 and the main circuit board 83 that are heat sources independent between the third duct unit 86 and the second duct 201, The flowing flow rate can be adjusted according to the amount of heat generated by the heat source. Thereby, the intake / exhaust force of the blower 85 can be used efficiently.

  Next, a structure in which the third duct unit 86 and the blower 85 (FIG. 19B) are substantially sealed using the second elastic member 312 (FIG. 19B) will be described with reference to FIG.

  The surface in contact with the second elastic member 312 of the third duct unit 86 includes a second surface 320, a first surface 319, and a third surface 321 in the descending order in the + Z direction. The first surface 319 is disposed in the vicinity of the exhaust port 65 (FIG. 19B) on the Z-direction projection. Moreover, the 3rd surface 321 is a surface through which the wire not shown of the air blower 85 passes. In this way, by changing the height of the surface of the third duct unit 86 that contacts the second elastic member 312, it is possible to adjust the force with which the second elastic member 312 pushes the blower 85.

  The blower 85 used in this embodiment has a lower rigidity around the exhaust port 65 than other portions. Therefore, by lowering the first surface 319 of the third duct unit 86 in the Z direction, the force with which the second elastic member 312 pushes around the exhaust port 65 of the blower 85 is weakened. The amount of compression of the second elastic member 312 is reduced. Thereby, there exists an effect which prevents that the exterior force of the air blower 85 deform | transforms and hits the blade | wing not shown of the air blower 85, and the rotational force of the air blower 85 falls.

  As described above, in the present embodiment, the first duct unit 82 is disposed between the main circuit board 83 (second heat source) and the image sensor unit 81 (first heat source). Further, a second duct unit 84 is disposed between the main circuit board 83 (second heat source) and the recording media board 87 (third heat source), and a third duct unit 84 is disposed between the second duct unit 84 and the recording media board 87. A duct unit 86 is arranged. For this reason, the heat generated by the three heat sources 83, 81, 87 can be divided and radiated by the three duct units 84, 82, 86. Thereby, the heat which generate | occur | produces in each heat source 83,81,87 can be thermally radiated efficiently, and the influence on the other heat source by the heat which generate | occur | produces in each heat source 83,81,87 can be reduced.

(Second Embodiment)
Next, with reference to FIGS. 22 to 38, an interchangeable lens type digital video camera according to a second embodiment of the electronic apparatus of the invention will be described. FIG. 22A is a perspective view of an interchangeable lens digital video camera according to a second embodiment of the electronic apparatus of the present invention as seen from the front side, and FIG. 22B is a digital video shown in FIG. It is the perspective view which looked at the camera from the back side. In the present embodiment, a digital video camera which is an example of an imaging device is illustrated as the electronic apparatus of the present invention, but the present invention is not limited to this.

  As shown in FIG. 22, the digital video camera of the present embodiment (hereinafter referred to as a camera) is provided with a mount portion 520 for attaching / detaching the interchangeable lens portion 510 and the interchangeable lens portion 510 to the front side of the camera body 501. It has been. A left cover unit 504 is provided on the left side when viewed from the front side of the camera body 501.

  The left cover unit 504 has a first intake port 541 for taking outside air into a first duct unit 700 (see FIG. 27) described later and a second intake air for taking outside air into the second duct unit 710 (see FIG. 27). A mouth 542 is provided. Further, the left cover unit 504 may be provided with a grip attachment portion to which a grip unit (not shown) for holding the camera body 501 at the time of photographing is detachably attached. In this grip unit, a key for starting / stopping photographing, a battery for operating the camera body 501, and the like are arranged, and the above operation can be performed by being electrically connected to the camera body 501.

  A right side cover unit 505 is provided on the right side when viewed from the front side of the camera body 501, and a right side operation key 565 and a power dial 560 are disposed on the right side cover unit 505.

  The right side operation key 565 is a button used at the time of shooting and playback, and a function can be assigned to each button. For example, there are buttons for starting / stopping shooting, peaking, partially expanding the shooting angle of view, switching the filter density of the ND unit, changing the rotational speed of the blower, and the like.

  The power dial 560 can be turned on / off and switched to a playback mode by rotating the camera. Further, the right cover unit 505 is provided with an exhaust port 550 for discharging air to the outside by a blower 650 (see FIG. 27) described later.

  A back cover unit 507 is provided on the back side of the camera body 501. Below the back cover unit 507, a recording medium cover 590 that protects the first recording medium 622 and the second recording medium 642 (see FIG. 36) that can record data captured by the camera body 501 is provided. Data can be simultaneously recorded on the first recording medium 622 and the second recording medium 642, and data can be recorded on the selected recording medium by selecting the recording medium. The first recording medium 622 can record data at a higher speed and consumes higher power than the second recording medium 642.

  A display panel unit 530 is provided at the center of the back cover unit 507. The display panel unit 530 is supported by the camera body 501 so as to be rotatable in the open / close direction and rotatable in the open state via a panel hinge portion 531 provided on the right cover unit 505 side of the back cover unit 507. Yes. Accordingly, the display panel unit 530 can be inverted and stored, and an image can be confirmed on the back surface of the camera body 501.

  Further, the rear cover unit 507 is provided with a third air inlet 580 for taking outside air into a third duct unit 720 (see FIG. 27), which will be described later, in the vicinity of the recording medium lid 590. Further, an external interface unit 570 is disposed on the left cover unit 504 side on the rear surface of the display panel unit 530. The external interface unit 570 is, for example, a BNC connector for outputting an SDI signal, an HDMI (registered trademark) connector for outputting video, a power supply connector for power supply, a headphone connector for audio output, and the like.

  FIG. 23 is a perspective view of the camera body 501 viewed from the back side with the display panel unit 530 open. As shown in FIG. 23, in the center of the back surface of the camera body 501, a back operation key 582 for displaying a menu and its operation, selecting an input voice, and setting a volume level is arranged.

  FIG. 24 is a perspective view of a state in which the external interface terminal 900 of the external connection cable is connected to the external interface unit 570 of the camera body 501 as viewed from the back side of the camera body 501. As shown in FIG. 24, in a state where the external interface terminal 900 is connected to the external interface unit 570, the display panel unit 530 is moved as shown in FIG. 23 by inserting a finger from the left cover unit 504 side on the back of the camera body 501. I can't open it.

  Therefore, in the present embodiment, as shown in FIGS. 23 and 24, a concave back finger hooking portion 585 is provided below the display panel portion (display unit) 530 of the back cover unit 507. The external interface unit 570 is provided on the opposite side of the panel hinge unit 531 with the display panel unit 530 interposed therebetween.

  FIG. 24 is a cross-sectional view of the main part in the vicinity of the back finger hooking portion 585 of the camera body 501. As shown in FIG. 25, the rear finger rest portion 585 is partially projected on the rear projection in a state where the display panel portion 530 is housed on the back surface of the camera body (device body) 501 as shown in FIGS. The positional relationship is overlapping.

  In addition, a rear finger hook portion 585 is disposed on the left cover unit 504 side of the back cover unit 507 with respect to the center of the display panel portion 530 in the housed state, that is, on the side far from the panel hinge portion 531 with respect to the center of the display panel portion 530. Yes. With these arrangements and shapes, as shown in FIG. 26, the photographer can easily open the display panel unit 530 by placing a finger from below.

  In addition, by providing the third intake port 580 in the rear finger rest portion 585, there is no need to provide a separate opening space for intake, which can contribute to downsizing and is stable even when the display panel portion 530 is housed. It is possible to take in air. In addition, there is an effect of radiating heat from the display panel unit 530, and the structure is less likely to occur when water droplets or the like are blown or flown from above.

  Next, the internal structure of the camera body 501 will be described with reference to FIG. FIG. 27 is an exploded perspective view of the camera body 501. In FIG. 27, the appearance cover unit is not shown.

  The camera body 501 includes a mount fixing member 670, an image sensor substrate unit 610, a second duct unit 710, a main circuit board 600, a first duct unit 700, a blower 650, and a back cover unit 507 from the front side toward the back side. Arranged in order. A state in which the main circuit board 600, the first duct unit 700, and the blower 650 are integrated is referred to as a main unit.

  The imaging element substrate unit 610 is a second heat source that generates heat during imaging. The second duct unit 710 is provided with a ventilation path, and connects the second intake port 542 and the exhaust port 550 described above. The image sensor substrate unit 610 is cooled by transferring heat generated in the image sensor substrate unit 610 to the second duct unit 710.

  The main circuit board 600 (first heat source) is a board for controlling the camera body 501 and connected accessories and the like. The main circuit board 600 has a plurality of heat sources on the board. It is a substrate that consumes and generates heat. A first duct unit 700 is disposed on the back surface of the main circuit board 600. The first duct unit 700 is provided with a ventilation path, and connects the first intake port 541 and the exhaust port 550 described above. Further, the main circuit board 600 is cooled by transferring heat generated in the main circuit board 600 to the first duct unit 700.

  A third duct unit 720 is disposed below the blower 650, and a first recording medium unit 620 (third heat source) on which a first recording medium 622 (see FIG. 36) can be mounted is disposed below the third duct unit 720. ) Is arranged. The third duct unit 720 is provided with a ventilation path, and connects the third intake port 580 and the exhaust port 550 described above.

  The first recording medium 622 generates heat when data is recorded. For this reason, the first recording medium 622 is cooled by the third duct unit 720. A second recording media unit 640 on which the second recording media 642 can be mounted is disposed below the first recording media unit 620. The first recording media unit 620 and the second recording media unit 640 are held by a holding member 660.

  Next, the flow of air generated by the blower 650 will be described with reference to FIGS. FIG. 28 is a cross-sectional view taken along a direction orthogonal to the optical axis as viewed from the back side of the camera body 501. FIG. 29 is a cross-sectional view along the optical axis direction as viewed from the upper surface side of the camera body 501. Note that the arrows shown in FIGS. 28 and 29 indicate the flow of air generated by the blower 650.

  As shown in FIG. 28 and FIG. 29, external air is sucked from the first air inlet 541, and the sucked air is taken into the blower 650 through the first duct unit 700. At the same time, external air is sucked from the second air inlet 542 (see FIG. 22B), and the sucked air passes through the second duct unit 710 and the second duct provided in the first duct unit 700. It passes through the connection port 706 and is taken into the blower 650.

  At the same time, external air is sucked from the third air inlet 580 (see FIG. 22B), and the sucked air passes through the third duct unit 720 and is provided in the first duct unit 700. It passes through the duct connection port 707 and is taken into the blower 650. Then, the air taken in from the three intake ports 541, 542, 580 is discharged to the outside by the blower 650 through the exhaust port 550.

  As described above, the main circuit board 600 that is the first heat source is radiated by the first duct unit 700, and the imaging element substrate unit 610 that is the second heat source is radiated by the second duct unit 710. In addition, the first recording media unit 620 as the third heat source is radiated by the third duct unit 720.

  Further, a second duct unit 710 is disposed between the main circuit board 600 and the image pickup element board unit 610. Thereby, heat generated in the main circuit board 600 having a large calorific value can be prevented from being transmitted to the imaging element board unit 610. A third duct unit 720 is disposed between the main circuit board 600 and the first recording media unit 620. Thereby, it is possible to prevent heat generated in the main circuit board 600 having a large calorific value from being transmitted to the first recording medium unit 620 and the first recording medium 622.

  In addition, as shown in FIG. 28, the air flowing through the second duct unit 710 and the third duct unit 720 is approximately on the projection of the blower 650 so as not to block the air flow of the first duct unit 700 and the flow of each other. It flows into the first duct unit 700 from a diagonal position. Then, the inflowing air is configured to be taken into the blower 650. For this reason, the blower 650 can be a single-sided intake type, and there is no need to arrange a duct unit on the rear cover unit 507 side of the blower 650. This makes it possible to reduce the thickness of the camera body 501 in the optical axis direction and achieve miniaturization.

  As described above, in the present embodiment, the three heat sources 600, 610, and 620 are divided by the ducts 700, 710, and 720, respectively, so that the heat sources 600, 610, and 620 are not affected by heat from each other. Can be reduced in size.

  The structure of the first duct unit 700 will be described with reference to FIGS. 30 to 32. FIG. 30 is a perspective view of a main unit in which the first duct unit 700, the main circuit board 600, and the blower 650 are integrated. FIG. 31 is a perspective view of the main unit shown in FIG. 30 as viewed from the back side. 32 is an exploded perspective view of the main unit shown in FIG. 30 and 31 indicate the flow of air generated by the blower 650.

  The first duct 701 constituting the first duct unit 700 is made of a member such as a metal having good thermal conductivity, and is covered with a first duct lid 702 to form a ventilation path so that air does not leak. Further, the first duct inlet 705 is connected to the portion of the first duct 701 that contacts the first inlet 541 (see FIG. 22B) via an elastic member 730 that also serves as a cushioning material. It is configured so that air does not leak to other parts.

  The main element mounted on the main circuit board 600 and the heat radiating first duct 701 are arranged so as to be in contact with each other in the optical axis direction so that the heat of the main element is transferred to the first duct 701 made of metal or the like. be able to. A heat radiating rubber or the like may be provided between the main element and the first duct 701 so that heat can be efficiently transmitted to the first duct 701.

  In addition, the first duct unit 700 is provided with a second duct connection port 706 connected to the second duct unit 710 (see FIG. 28) and a third duct connection port 707 connected to the third duct unit 720 (see FIG. 28). The air flows from each.

  In addition, an elastic member 732 is provided between the first duct lid 702 and the air intake portion of the blower 650, and the air does not leak while efficiently flowing air. In addition, an elastic member 731 is provided on the exhaust side of the blower 650 so as to fill a gap with the exhaust port 550.

  FIG. 33 is a perspective view of the first duct 701. As shown in FIG. 33, a large number of first duct fins 703 are erected inside the first duct 701. In the present embodiment, the first duct fin 703 is formed integrally with the first duct 701, but the first duct fin 703 may be a separate body as a heat sink and fixed to the first duct 701. Since the first duct fin 703 is erected, when the air flows inside the first duct unit 700, the surface area in contact with the air can be increased, so that heat can be transferred to the air more efficiently and heat can be dissipated.

  At this time, by limiting the flow path of the air flowing in the first duct unit 700 by the first duct 701 and the first duct lid 702, the air can be efficiently flowed as described above, and the heat dissipation effect is enhanced. It is done. Further, the positions of the first duct intake port 705, the second duct connection port 706, and the third duct connection port 707 that are substantially diagonal on the projection of the intake section of the blower 650 so as not to block each other's air flow. The connection ports 706 and 707 are arranged at the same position. This prevents an efficient and mixed heat flow.

  The positions of the first duct intake port 705, the second duct connection port 706, and the third duct connection port 707 are not necessarily limited to positions that are substantially diagonal on the projection of the intake portion of the blower 650, and the flow of each other is not limited. Each connection port may be in any position as long as it does not block.

  Next, the structure of the second duct unit 710 and the imaging element substrate unit 610 will be described with reference to FIGS. 34 and 35. FIG. 34 is a perspective view of the second duct unit 710 and the image pickup device substrate unit 610 as seen from the back side of the camera body 501. FIG. 35 is an exploded perspective view of the second duct unit 710 and the image pickup device substrate unit 610 as viewed from the front side of the camera body 501. Note that the arrows shown in FIG. 34 indicate the flow of air generated by the blower 650.

  The second duct unit 710 includes an image sensor heat transfer member 712 and a second duct 711 for heat dissipation. The second duct 711 is covered with an image sensor heat transfer member 712 and a second duct seal member 714, and forms a ventilation path so that air does not leak. The imaging element heat transfer member 712 is made of a material having high thermal conductivity, and the imaging element 611 and the heat conduction surface 713 of the imaging element substrate unit 610 are in contact with each other and fixed. Thereby, the heat of the image sensor 611 is transmitted to the image sensor heat transfer member 712 via the heat conduction surface 713. The heat conduction surface 713 is provided on the surface opposite to the imaging surface side of the imaging element 611.

  And the air which flowed in from the 2nd duct inlet port 715 connected with the 2nd inlet port 542 (refer FIG.22 (b)) was comprised by the 2nd duct 711, the image pick-up element heat transfer member 712, and the 2nd duct seal material 714. It passes through the ventilation path and is discharged to the second duct exhaust port 717. At this time, an elastic member 735 is disposed between the second air inlet 542 and the second duct air inlet 715 so that air does not leak to other portions. The second duct exhaust port 717 is connected to the second duct connection port 706, and the air taken into the blower 650 is discharged to the outside through the exhaust port 550.

  In addition, by arranging the second duct intake port 715 and the second duct exhaust port 717 diagonally to the image sensor 611 and the heat conduction surface 713, a maximum amount of air flows on the surface of the image sensor heat transfer member 712. Can do. Thereby, since the surface area which touches air can be expanded, heat can be more efficiently transferred to air and heat can be dissipated.

  The structure around the third duct unit 720 and the first recording media unit 620 will be described with reference to FIGS. FIG. 36 is a perspective view around the third duct unit 720, the first recording media unit 620, and the second recording media unit 640. FIG. FIG. 37 is an exploded perspective view around the third duct unit 720, the first recording media unit 620, and the second recording media unit 640. FIG. 38 is a main part sectional view showing a heat dissipation structure around the third duct unit 720. The arrows shown in FIGS. 36 and 38 indicate the flow of air generated by the blower 650.

  The first recording media unit 620 is electrically and thermally connected to the first media substrate 621 and the first media substrate 621 by soldering or the like, and a holding case portion (holding member) that holds the first recording media 622. 625 and the like. Further, the upper surface (planar portion) 626 of the holding case portion 625 has a rectangular shape, for example, and is disposed substantially parallel to the first media substrate 621. Heat generated from the first recording medium 622 is transmitted to the first media substrate 621 and the upper surface 626 of the holding case portion 625.

  The third duct unit 720 is covered and sealed by the upper surface 626 of the holding case portion 625 and the elastic member 737, and constitutes a ventilation path so that air does not leak.

  And the air which flowed in from the 3rd duct inlet port 721 connected with the 3rd inlet port 580 (refer FIG.22 (b)) was comprised by the 3rd duct unit 720, the upper surface 626 of the holding | maintenance case part 625, and the elastic member 737. It passes through the ventilation path and is discharged to the third duct exhaust port 722. At this time, an elastic member 736 is disposed between the third air inlet 580 and the third duct air inlet 721 so that air does not leak to other portions.

  As shown in FIG. 38, by arranging the third duct intake port 721 side and the third duct exhaust port 722 side substantially diagonally with respect to the upper surface 626 of the holding case portion 625, a maximum amount of air is formed on the surface of the upper surface 626. The surface area in contact with air can be increased. For this reason, the heat generated from the first recording medium 622 can be more efficiently transferred to the air and radiated.

  Further, the third duct unit 720 is disposed on the first recording medium 622 and the holding case portion 625 side of the first media substrate 621, that is, the side that becomes a dead space in mounting electronic components. As a result, various electronic components can be mounted on the opposite surface of the holding case portion 625 of the first media substrate 621, and the camera body 501 can be downsized. Further, it is possible to reduce the size by arranging the second recording media unit 640 including the second recording media 642 on the opposite surface of the holding case 625 of the first media substrate 621.

  The configuration of the present invention is not limited to those exemplified in the above embodiments, and the material, shape, dimensions, form, number, arrangement location, and the like are appropriately changed without departing from the gist of the present invention. Is possible.

1 Camera body 81 Image sensor unit 82 First duct unit 83 Main circuit board 84 Second duct unit

Claims (29)

An electronic device having a plurality of heat sources,
A first duct that is disposed between the first heat source and the second heat source, dissipates the heat of the first heat source to the outside, and is disposed at a position sandwiching the first heat source between the first duct and the first duct; An electronic device comprising: a second duct that radiates heat of the second heat source to the outside. A third heat source disposed at a position sandwiching the second duct with the first heat source;
The electronic apparatus according to claim 1, further comprising: a third duct that is disposed between the third heat source and the second duct and radiates heat of the third heat source to the outside.   The electronic device according to claim 2, wherein the first duct, the second duct, and the third duct are arranged substantially in parallel.   The electronic apparatus according to claim 3, wherein the first duct, the second duct, and the third duct are arranged perpendicular to the optical axis. The first heat source includes an image sensor unit,
A heat dissipating member fixed to the image sensor unit;
A holding member for holding the heat dissipation member via an elastic member,
The electronic apparatus according to claim 4, wherein a flow path of the first duct is formed between the heat dissipation member and the holding member.   The electronic apparatus according to claim 5, wherein the elastic member is elastically deformable in a direction perpendicular to the optical axis with respect to the heat radiating member.   The electronic device according to claim 5, wherein the holding member is made of a light transmissive material.   The blower for sucking outside air into the second duct and the third duct is provided between the second duct and the third duct. The electronic device as described in.   The electronic apparatus according to claim 2, wherein the first duct communicates with the second duct.   The blower for sucking outside air into the first duct, the second duct, and the third duct is provided between the second duct and the third duct. Electronic equipment.   The electronic device according to claim 2, wherein the third heat source includes a recording media substrate. The third duct has a flow path of outside air flowing along the third heat source and a flow path of outside air flowing in the vicinity of the blower,
The width of the flow path of the outside air flowing along the third heat source is narrower than the width of the flow path of the outside air flowing in the vicinity of the blower. Electronics. The second duct includes at least an upstream fin and a downstream fin arranged at a constant pitch in a direction perpendicular to the flow path direction,
The electronic device according to any one of claims 1 to 12, wherein the upstream fin and the downstream fin are arranged offset by a half pitch from each other.   The cutout portion is formed in the outer portion of the second duct so that the flow path cross-sectional areas of all the flow paths of the upstream fin and the downstream fin are substantially constant. Item 14. The electronic device according to Item 13.   The electronic apparatus according to claim 14, wherein the second duct includes a heat radiating plate disposed at a position different from the upstream fin and the downstream fin.   The electronic apparatus according to claim 1, wherein the first heat source has a larger calorific value than the second heat source.   The member having a lower thermal conductivity than the side facing the second heat source of the first duct is disposed on the side facing the first heat source of the first duct. 16. The electronic device according to 16.   The electronic device according to claim 16 or 17, wherein a cross-sectional area of a flow path of the second duct is larger than a cross-sectional area of a flow path of another duct.   A surface facing the first heat source of the first duct and a surface facing the second heat source are electrically connected by a conductive member, and the conductive member forms a flow path of air flowing through the first duct. The electronic device according to claim 1, wherein the electronic device is disposed at a position where the electronic device is placed. An electronic device having a plurality of heat sources,
Recording media,
A media substrate as a heat source,
A holding member that is electrically and thermally connected to the media substrate and has a plane portion parallel to the media substrate and the recording medium to hold the recording medium;
A heat dissipating duct having an air inlet and an air outlet,
The electronic device, wherein the duct and the flat portion of the holding member are sealed with an elastic member. A media cover for protecting the recording medium;
21. The electronic apparatus according to claim 20, wherein the air intake port is disposed in the vicinity of the media lid and on a surface side of the media substrate on which the holding member is disposed.   The electronic device according to claim 20 or 21, wherein the holding member is made of metal and is at least partially in contact with the recording medium. The flat portion of the holding member is formed in a rectangular shape,
The electron according to any one of claims 20 to 22, wherein the air inlet and the air outlet are arranged at positions that are substantially diagonal to the planar portion on the projection of the media substrate. machine.   24. The electronic device according to claim 20, further comprising a blower that forms an air flow inside the duct. An electronic device having a plurality of heat sources and a plurality of ducts,
A first duct for radiating heat of the first heat source to the outside;
A second duct that is disposed at a position sandwiching the first heat source with the first duct, and radiates heat of the second heat source to the outside;
A third duct disposed between the first heat source and the third heat source and dissipating the heat of the third heat source to the outside,
The first heat source and the second heat source extend in a direction perpendicular to each other and are arranged substantially parallel to each other, and the third heat source is arranged in a direction perpendicular to the first heat source,
The electronic apparatus, wherein the second duct and the third duct are connected to the first duct. The first duct is provided with a single-sided intake blower,
The intake port of the first duct, the connection port of the second duct and the first duct, and the connection port of the third duct and the first duct are substantially diagonal in terms of projection of the intake part of the blower. The electronic apparatus according to claim 25, wherein the electronic apparatus is disposed at a position. A display unit supported to be rotatable in the opening / closing direction in the opening / closing direction via a hinge portion with respect to the device body,
The air inlet of the third duct is formed in a concave finger-hanging portion that is formed on a surface facing the device main body in a state where the display unit is closed and a part thereof is exposed to the outside. 27. The electronic device according to claim 25 or 26.   28. The electronic apparatus according to claim 27, wherein an air inlet of the third duct is disposed on a side farther from the hinge than the center of the display unit. The device body has an external interface unit,
29. The electronic apparatus according to claim 25, wherein the external interface unit and the hinge unit are disposed on opposite sides of the display unit.

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