JP6679304B2 - Imaging device - Google Patents

Description

  The present invention relates to an image pickup apparatus such as a digital video camera for business use such as broadcasting, and particularly to an image pickup apparatus having a forced air cooling structure by a fan.

  Many commercial digital video cameras, such as those for broadcasting, have a shooting style in which the photographer holds the camera body on his shoulder to take a picture, and in order to reduce the burden on the shoulder of the photographer, A shoulder pad is provided on the shoulder.

  In addition, while this type of digital video camera is required to be small in size, it is required to have higher functionality and higher image quality, which leads to an increase in power consumption, which leads to a higher exterior temperature and a guaranteed temperature of internal electric elements. There is a problem of thermal runaway caused by exceeding. In the case of a shoulder type digital video camera, the photographer's face is located near one side surface of the camera body, so an intake port and an exhaust port are provided on the other side surface of the camera body for forced air cooling by a fan. A technique has been proposed (Patent Document 1). In this proposal, a compartment is provided to prevent raindrops from entering the camera body even if the intake port and the exhaust port are enlarged.

JP, 2009-151037, A

  However, in Patent Document 1, since there is no duct structure from the intake port to the exhaust port, it is difficult to efficiently dissipate the heat generated by the internal electric element. Also, since the intake port and exhaust port are located on the same surface as the side surface exterior of the camera body, if the side surface of the camera body approaches a wall when shooting, the intake port and exhaust port will be blocked by the wall. Air cannot be sucked in or exhausted, which may cause thermal runaway.

  Therefore, the present invention provides an imaging device that enables downsizing of the device body, enhances heat dissipation efficiency, and further secures an air intake / exhaust space even when approaching a wall side during shooting. The purpose is to provide.

In order to achieve the above object, an imaging device of the present invention is an imaging device in which an intake port and an exhaust port are provided on one side surface of a device body, and a fan and a duct are provided inside the device body, wherein the duct , possess an intake portion of the duct structure for the intake port communicating with an exhaust portion of the duct structure for the exhaust port and communicating, a cooling portion of the duct structure located between the inlet portion and the exhaust portion, wherein The intake part and the exhaust part are integrated with the cooling part and extend in a direction intersecting the cooling part, respectively , and the intake part is sucked from the intake port by driving the fan. The air is sent to the cooling unit, the cooling unit performs heat exchange with the air sent from the intake unit, and the exhaust unit discharges the air warmed by heat exchange in the cooling unit from the exhaust port. To do A first substrate is arranged on the surface of the cooling unit on the side where the intake port and the exhaust port are opened, and on the surface of the cooling unit opposite to the surface on which the first substrate is arranged. In the space inside the duct, in which the second substrate is disposed and which is surrounded by the cooling unit, the intake unit, and the exhaust unit, the mounting unit and the input / output terminal unit in which the recording medium is detachably mounted , It is characterized in that it is arranged so as to project outward in the width direction of the apparatus main body from the intake port and the exhaust port.

  According to the present invention, it is possible to reduce the size of the main body of the apparatus, improve heat dissipation efficiency, and further secure an air intake / exhaust space even when approaching a wall during shooting. Can be provided.

It is an appearance perspective view of a digital video camera which is an example of an embodiment of an imaging device of the present invention. It is a disassembled perspective view of the digital video camera shown in FIG. (A) is the figure which looked at the camera main body from the front side, (b) is the side view of the right side seen from the front side of the camera main body. FIG. 6A is a side view of the left side of the camera body when viewed from the front side, and FIG. 7B is a view of the left side surface of the camera body that is in contact with a wall when viewed from the front side of the camera body. . FIG. 3 is a perspective view showing a state in which an intake cover and an exhaust cover are removed from an intake port and an exhaust port of the camera body, respectively. It is an exploded perspective view of a camera body. It is the perspective view seen from the back side of the front cover unit. FIG. 6A is a perspective view of the right cover unit as seen from the back surface side, and FIG. (A) is a perspective view of the left cover unit as seen from the front side, and (b) is a perspective view of the left cover unit shown in (a) as seen from the back side. FIG. 6A is a perspective view of the card board unit viewed from the back side, and FIG. 7B is a perspective view of the card board unit viewed from the bottom side. FIG. 7A is a perspective view of the main unit as viewed from the rear side of the camera body, and FIG. 7B is a perspective view of the main unit as viewed from the front side of the camera body. FIG. 6A is a perspective view of the main board as viewed from the side where it is attached to the fan duct unit, and FIG. 7B is a perspective view of the main board as shown in FIG. FIG. 6A is a perspective view of the sub-board viewed from the side where the sub-board is attached to the fan duct unit, and FIG. 9B is a perspective view of the sub-board shown in FIG. (A) is a perspective view of a network board, (b) is a perspective view of a video compression circuit board. It is a perspective view of a power supply board. FIG. 6A is a perspective view of the fan duct unit as seen from the rear side of the camera body, and FIG. 7B is a perspective view of the fan duct unit as seen from the front side of the camera body. 16A is a side view of the fan duct unit viewed from the direction of arrow D in FIG. 16B, and FIG. 16B is a top view of the fan duct unit shown in FIG. (A) is a perspective view of a fan, (b) is the perspective view which looked at the fan shown in (a) from the back side. It is a perspective view of fan rubber. (A) is a perspective view of a state in which the fan is incorporated in the fan rubber as seen from the suction side of the fan, and (b) is a perspective view of the state in which the fan is incorporated in the fan rubber as seen from the discharge side of the fan. (A) is a perspective view of the right duct as seen from the back side of the camera body, and (b) is a view of the right duct as shown in (a) as seen from the direction of arrow E. (A) is a perspective view of a left duct, (b) is the figure which looked at the left duct shown in (a) from the arrow F direction. (A) is a perspective view of the left duct rear, (b) is a perspective view of the left duct rear shown in (a) as seen from the arrow G direction. It is an exploded perspective view of a fan duct unit. It is the sectional view on the AA line of Fig.17 (a). It is the BB sectional view taken on the line of FIG.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an external perspective view of a digital video camera which is an example of an embodiment of an image pickup apparatus of the present invention. FIG. 2 is an exploded perspective view of the digital video camera shown in FIG.

  As shown in FIGS. 1 and 2, the digital video camera of the present embodiment is provided with a replaceable lens barrel 101 detachably provided on the front side (subject side) of a camera body 100, and a bottom portion of the camera body. The shoulder unit 103 is detachably provided in the. A handle 102 and a viewfinder 104 are detachably provided on the upper surface of the camera body 100. The viewfinder 104 is arranged on the front side of the handle 102 and above the lens barrel 101. The lens barrel 101 and the viewfinder unit 104 are electrically connected to the camera body 100 via contact points while being mounted on the camera body 100. The camera body 100 corresponds to an example of the apparatus body of the present invention.

  FIG. 3A is a view of the camera body 100 as viewed from the front side, and FIG. 3B is a right side view of the camera body 100 as viewed from the front side. FIG. 4A is a side view of the left side of the camera body 100 when viewed from the front side, and FIG. 4B is a state where the left side surface of the camera body 100 contacts the wall 215 when viewed from the front side. It is the figure seen from the upper surface side.

  As shown in FIG. 3A, the camera body 100 is provided with an image pickup button 201, an image pickup element 200, and the like. The image sensor 200 is composed of a CMOS sensor, a CCD sensor, or the like, and photoelectrically converts a subject image formed by passing through the photographing optical system of the lens barrel 101 and outputs it to an image processing unit (not shown). As shown in FIG. 3B, a power button 202, an operation button group 203, an operation dial 204, and a display unit 205 are provided on the right side surface of the camera body 100 when viewed from the front side.

  Further, as shown in FIG. 4A, a card lid 210 and an external input / output terminal portion are provided on a left side surface which is one side surface in the width direction of the camera body 100 when viewed from the front side of the camera body 100. 220, a photographing button 206, an intake port 230, and an exhaust port 240 are provided. The card cover 210 covers an opening of a card slot (not shown) so as to be openable and closable. Further, the intake port 230 is arranged on the front side (right side in the drawing) of the camera body 100, and the exhaust port 240 is arranged on the rear side of the camera body 100. Then, the camera body 100 sucks the external air from the intake port 230 by driving the fan 300, which will be described later, and discharges the airflow generated by the driving of the fan 300 from the exhaust port 240.

  In the digital video camera of the present embodiment, the photographer places the shoulder unit section 103 on the right shoulder to perform photographing. Therefore, the photographer's face is adjacent to the right side when viewed from the front side of the camera body 100, but the exhaust port 240 is located on the left side when viewed from the front side of the camera body 100. Exhaust air from does not hit the photographer's face and does not cause any discomfort.

  Further, as shown in FIG. 4B, since the card cover 210 and the external input / output terminal portion 220 are projected to the outside of the camera body 100 with respect to the intake port 230 and the exhaust port 240, the intake port is formed by the wall 215. It does not block 230 or the exhaust port 240. Therefore, it is possible to efficiently dissipate heat without interfering with the flow of intake and exhaust air shown by the arrow in FIG. 4B, and to sufficiently cool the camera body 100.

  FIG. 5 is a perspective view showing a state in which the intake cover 231 and the exhaust cover 241 are removed from the intake port 230 and the exhaust port 240 of the camera body 100, respectively. As shown in FIG. 5, the intake cover 231 and the exhaust cover 241 are fixed to the camera body 100 by screws 234, respectively.

  An intake filter 232 is incorporated inside the intake cover 231. The intake filter 232 is made of urethane foam having a completely open cell structure, and can prevent dust or the like that is sucked together with air from entering the inside during intake. The intake filter 232 is a relatively thick filter and can obtain a high dust collection rate for the air taken in from the intake cover 231.

  Further, inside the exhaust cover 241, an exhaust filter 242 made of the same material as the intake filter 232 is incorporated, and like the intake port 230, dust and the like are prevented from entering the inside from the exhaust cover 241. be able to.

  FIG. 6 is an exploded perspective view of the camera body 100. As shown in FIG. 6, the camera body 100 forms an exterior by a front cover unit 251, a right cover unit 252, a left cover unit 253, a back cover unit 254, a top cover unit 255, and a bottom cover unit 256. The main unit 250 is covered by these cover units 251 to 256. The top cover unit 255 and the bottom cover unit 256 are provided with a plurality of screw holes 257 so that external devices, accessories, etc. can be attached to the camera body 100.

  FIG. 7 is a perspective view of the front cover unit 251 as viewed from the back surface side. As shown in FIG. 7, the front cover unit 251 is provided with a mount portion 208 (see FIG. 3A) for fixing the sensor substrate 258 on which the image pickup device 200 is mounted and the lens barrel 101. .

  As described above, since the image sensor 200 includes the CMOS sensor and the CCD sensor as described above, there is a problem in that noise and the like increase due to heat generated by the element itself and the image quality deteriorates. Further, since the circuit on the sensor substrate 258 also generates heat and supplies heat to the image sensor 200, it is necessary to dissipate heat around the image sensor 200 and the sensor substrate 258. For this reason, the sensor heat radiation plate 259 is fixed to the sensor substrate 258 with screws or the like to radiate heat.

  FIG. 8A is a perspective view of the right cover unit 252 seen from the back surface side, and FIG. 8B is a perspective view of the back cover unit 254. As shown in FIG. 8A, the right cover unit 252 is provided with a display control board 260. The display control board 260 displays shooting settings and an image being shot on the display unit 205, and sets the camera body 100 according to input contents of switches such as the power button 202, the operation button group 203, and the operation dial 204. A control IC (not shown) for controlling is mounted. The display control board 260 is electrically connected to a later-described main board 400 (see FIG. 11A) included in the main unit 250.

  As shown in FIG. 8B, the back cover unit 254 is provided with a battery terminal 225, and the camera body 100 can be operated by supplying power from a battery (not shown).

  9A is a perspective view of the left cover unit 253 viewed from the front surface side, and FIG. 9B is a perspective view of the left cover unit 253 shown in FIG. 9A viewed from the back surface side.

  As shown in FIG. 9A, the left cover unit 253 is provided with a voice output terminal 221 and a voice input terminal 222 as the external input / output terminal section 220. The audio output terminal 221 and the audio input terminal 222 are connected to a signal control board 262 and a sub-board 401 included in the main unit 250, which will be described later. When a cable or the like is connected to the audio output terminal 221 or the audio input terminal 222, the cable or the like can be pulled out obliquely to the rear side with respect to the camera body 100 so that the cable or the like does not get in the way during shooting. There is. Since it is necessary to dispose a substrate or the like inside the external input / output terminal portion 220, a large space inside the left cover unit 253 is required.

  Further, the left cover unit 253 is provided with a card lid 210 that openably and closably covers an opening of a card slot (not shown) of a card board unit 261 described later to which a recording medium for recording an image is detachably mounted. ing. A recording medium such as a memory card can be removably attached to the card slot of the card substrate unit 261 in the lateral direction of the camera body 100, which facilitates insertion and removal of the recording medium.

  As shown in FIG. 9B, the left cover unit 253 is provided with a signal control board 262, a card board unit 261 and the like. The signal control board 262 and the card board unit 261 are connected to a main board 400 and a sub board 401, which will be described later, by a wire harness or the like, and perform communication of video and audio signals.

  10A is a perspective view seen from the back side of the card substrate unit 261, and FIG. 10B is a perspective view seen from the bottom side of the card substrate unit 261.

  As shown in FIG. 10A, the card board unit 261 is electrically connected to a video compression circuit board 403 described later. In addition, the card board unit 261 includes two card boards 263a and 263b for recording images on a recording medium and a storage card board 264 for storing a setting save file when the camera body 100 takes a picture. Two substrates are provided.

  When recording a high-resolution and high-frame-rate image, the IC in the recording medium generates heat, so that the recording medium needs to be cooled. Therefore, heat dissipation rubber (not shown) is provided on the card substrates 263a and 263b to radiate heat to the heat dissipation plate 268. Further, the three boards 263a, 263b, 264 and the heat dissipation plate 268 are fixed to the card board base 265 made of metal with screws or the like while being positioned.

  Further, as shown in FIG. 10B, the card board base 265 is provided with a card cooling fan 266, and the exhaust air of the card cooling fan 266 is applied to the card board base 265 and the heat dissipation plate 268 to radiate heat. It is carried out. Further, a card radiating rubber 267 that radiates heat to the bottom cover unit 256 is attached to the radiating plate 268.

  FIG. 11A is a perspective view of the main unit 250 as seen from the rear side of the camera body 100, and FIG. 11B is a perspective view of the main unit 250 as seen from the front side of the camera body 100.

As shown in FIG. 11, the main unit 250, a fan duct unit 301, the main board 400, the sub-substrate 401, a network board 402, the video compression circuit board 403, the power supply board 404, a main board radiating plate 410, and the sub-board heat radiating plate 411. The main board heat dissipation plate 410 and the sub board heat dissipation plate 411 are formed of sheet metal members such as copper and aluminum having excellent thermal conductivity, and perform heat dissipation of the heat generating components mounted on the main board 400 and the sub board 401, respectively. There is.

  In the camera body 100, the main board 400, the sub board 401, the video compression circuit board 403, and the power supply board 404 consume power in this order. By fixing the plurality of substrates 400 to 404 that generate heat to the fan duct unit 301 to transfer heat, it is possible to cool the plurality of substrates 400 to 404 at once. Since high-speed communication is required among the main board 400, the sub-board 401, the network board 402, and the video compression circuit board 403, a thin coaxial wire or the like is used for connection between the boards.

  Next, the main board 400, the sub-board 401, the network board 402, the video compression circuit board 403, and the power supply board 404 will be described with reference to FIGS.

  FIG. 12A is a perspective view of the main board 400 as viewed from the side where it is attached to the fan duct unit 301, and FIG. 12B is a perspective view of the main board 400 as shown in FIG. is there.

  As shown in FIG. 12, since the main substrate 400 is electrically connected to all electronic devices, many ICs are mounted and the main substrate 400 has the largest area in the camera body 100. On the side of the main board 400 shown in FIG. 12A, a front-end IC 600 that processes signals from the sensor board 258, a video processing IC 602 that performs processing such as color adjustment on video, and these ICs 600 and 602 are used. A memory 603 and the like are installed. The front-end IC 600, the image processing IC 602, and the memory 603 are mounted on the side of the fan duct unit 301 because they consume a large amount of power and generate a large amount of heat. Heat is transferred to the duct unit 301.

  A circuit component 604 for supplying power to the front end IC 600 and the image processing IC 602 is mounted on the side of the main board 400 shown in FIG. The heat generated in the circuit component 604 is transferred to the main board heat dissipation plate 410 (see FIG. 11A) and radiated.

  FIG. 13A is a perspective view of the sub-board 401 as viewed from the side where it is attached to the fan duct unit 301, and FIG. 13B is a perspective view of the sub-board 401 as shown in FIG. is there.

  On the side of the sub-board 401 shown in FIG. 13A, a back-end IC 611 and a format conversion IC 612 which receive video data from the video processing IC 602 of the main board 400 and convert the optimum video format for each external input / output. Etc. are implemented. The back-end IC 611 and the format conversion IC 612 are also mounted on the side of the fan duct unit 301 of the sub-board 401, and heat generated in each of the ICs 611 and 612 is transferred to the fan duct unit 301 by using a heat dissipation rubber (not shown). .

  A circuit component 613 for supplying power to the back-end IC 611 and the format conversion IC 612 is mounted on the side of the sub-board 401 shown in FIG. 13B, and the heat of the circuit component 613 is generated by the sub-board heat sink 411. (See FIG. 11B) and the heat is dissipated.

  14A is a perspective view of the network board 402, and FIG. 14B is a perspective view of the video compression circuit board 403.

  As shown in FIG. 14A, a communication IC 621 for controlling wireless communication such as WIFI is mounted on the network board 402, and an image taken in the camera body 100 can be transmitted to an external device. . Further, as shown in FIG. 14B, the video compression circuit board 403 is an image for receiving video data from the video processing IC 602 of the main board 400 and writing the video on the recording medium at high resolution and high frame rate. A compression IC 631 is mounted.

  FIG. 15 is a perspective view of the power supply board 404. As shown in FIG. 15, the power supply board 404 supplies power to the main board 400, the sub-board 401, the network board 402, the video compression circuit board 403, and the electric devices in the camera body 100. Since the power consumption of the entire camera body 100 is large, components such as a relatively large capacitor 641 and coil 642 are mounted on the power supply board 404. The power supply board 404 is connected to the main board 400 by a BtoB connector 643, and supplies power to a large number of electric devices using a large number of pins of the BtoB connector 643.

  16A is a perspective view of the fan duct unit 301 as seen from the rear side of the camera body 100, and FIG. 16B is a perspective view of the fan duct unit 301 as seen from the front side of the camera body 100. FIG. 17A is a side view of the fan duct unit 301 seen from the direction of arrow D in FIG. 16B, and FIG. 17B is a top view of the fan duct unit 301 shown in FIG. 17A.

  As shown in FIG. 16, a right duct 302, a left duct 303, and a left duct rear 304 are fixed to the fan duct unit 301 by screws 305. Inside the fan duct unit 301, as shown in FIGS. 16B and 17A, two fans 300, which are small axial fans incorporated in a fan rubber 306, are arranged vertically in the drawing. It is provided. By adopting a small axial fan as the fan 300, the fan duct unit 301 can be downsized, and the camera body 100 is downsized. Further, by incorporating the fan 300 into the fan rubber 306, vibration generated when the fan 300 rotates is reduced.

  In FIG. 17B, the fan duct unit 301 can be roughly divided into an intake section 325, a cooling section 326, and an exhaust section 327, which are indicated by broken lines. The intake section 325 communicates with an intake port 230 provided in the left cover unit 253 of the camera body 100, and sends air from the outside of the camera body 100 to the cooling section 326.

  In the cooling unit 326, heat is exchanged with air by a right duct fin 331 and a left duct fin 341 for cooling, which will be described later. As a result, by cooling the fan duct unit 301, it is possible to cool the ICs mounted on the main board 400, the sub-board 401, and the like. The exhaust part 327 communicates with the exhaust port 240 provided in the left cover unit 253 of the camera body 100, and exhausts the air warmed by heat exchange.

  Here, the cooling unit 326 extends in the optical axis direction along the inner surface of the exterior of the right cover unit 252 that forms the other side surface portion in the width direction of the camera body 100 when viewed from the front side of the camera body 100. . Further, the air intake portion 325 is connected to the cooling portion 326 so as to intersect the front end portion of the camera body 100 at substantially right angles, and the exhaust portion 327 is connected to the rear end portion of the cooling portion 326 of the camera body 100. Is connected to obtuse angle to. Therefore, the fan duct unit 301 has a substantially U shape.

  Further, in FIG. 17B, Wd represents the width dimension of the right duct 302 and the left duct 303 combined, and Wf represents the width dimension of the fan 300. In the fan duct unit 301 of the present embodiment, the relationship of Wd <Wf is possible by disposing the fan 300 in the vicinity of the connecting portion of the cooling unit 326 and the exhaust unit 327. As a result, the fan duct unit 301 can be made thin, and thus the camera body 100 can be made thin.

  Further, by making the fan duct unit 301 into a substantially U shape, the main board 400 having a relatively large area can be arranged outside the cooling unit 326 (upper side in FIG. 17B), and the cooling unit 326 can be arranged. The sub-board 401 having a relatively small area can be arranged inside the substrate. Further, the right duct fin 331 (see FIG. 21B) of the right duct 302 outside the cooling unit 326 can be lengthened in the wind flow direction, and the main board 400 can be cooled effectively. .

  Further, by forming the fan duct unit 301 into a substantially U shape, a space 307 can be provided inside the fan duct unit 301 (lower side in FIG. 17B). The card board unit 261 and the external input / output terminal section 220 have a large depth dimension in the width direction of the camera body 100 and require a large space in the width direction of the camera body 100. In this embodiment, by disposing the card board unit 261 in the substantially U-shaped inner portion of the fan duct unit 301, that is, in the space 307 surrounded by the intake portion 325, the cooling portion 326, and the exhaust portion 327, the camera body It is possible to reduce the width of the device 100 in the width direction. As a result, the camera body 100 can be downsized. The card board unit 261 corresponds to an example of the mounting portion of the present invention.

  Further, as shown in FIG. 17B, by making the fan duct unit 301 substantially U-shaped, the intake port 230 and the exhaust port 240 can be arranged in the left cover unit 253. The right duct 302, the left duct 303, and the left duct rear 304 are made of a metal material such as aluminum and magnesium, and the fan rubber 306 is made of an elastic material such as silicon.

  Next, the fan 300 will be described with reference to FIG. 18A is a perspective view of the fan 300, and FIG. 18B is a perspective view of the fan 300 shown in FIG.

  As shown in FIG. 18, the fan 300 has an exterior formed of a resin frame 310, and has a fan wire 312 for electrically connecting to the main board 400 and a fan board (not shown). A motor (not shown), which is electrically connected via a fan substrate, is held inside the fan 300, and a pressure difference is generated by rotating the blade 313 by the motor to send air. Further, as a rotation detecting means of the blade 313, a magnet (not shown) is provided on the blade 313, and a hall element (not shown) is provided on the fan substrate, and the blade 313 is detected by detecting the rotation speed of the blade 313. Is provided with a means for performing feedback control so that the rotation speed becomes a predetermined rotation speed.

  As a result, the fan 300 has a function of sucking air from the suction side and discharging air from the discharge side, and can control the rotation speed. In general, the axial fan can obtain a sufficiently large air volume by rotating the blade 313 at a low speed. By rotating the blade 313 at a low speed, noise noise such as wind noise and motor noise can be suppressed, which is optimal for a digital video camera.

  Next, the fan rubber 306 will be described with reference to FIGS. 19 and 20. FIG. 19 is a perspective view of the fan rubber 306. As shown in FIG. 19, the fan rubber 306 is provided with an outer rib 321, an inner rib 322, and a cutout portion 323 formed of a rubber member such as silicon rubber. The inner ribs 322 are provided at the four inner corners of the fan rubber 306.

  20A is a perspective view of the state in which the fan 300 is incorporated in the fan rubber 306 as seen from the suction side of the fan 300, and FIG. 20B is the state in which the fan 300 is incorporated in the fan rubber 306 on the discharge side of the fan 300. It is the perspective view seen from.

  As shown in FIG. 20, the fan rubber 306 holds the fan 300 by being sandwiched by the inner ribs 322 so as not to cover the suction side and discharge side openings of the fan 300. At this time, as shown in FIG. 20B, by pulling out the fan wire 312 of the fan 300 from the cutout portion 323, the outer shape of the fan 300 and the inner diameter of the fan rubber 306 can be assembled without a gap. You can

  Next, the right duct 302 will be described with reference to FIG. 21A is a perspective view of the right duct 302 seen from the back side of the camera body 100, and FIG. 21B is a view of the right duct 302 shown in FIG.

  As shown in FIG. 21A, the right duct 302 has a main board 400 and a main board fixing portion 332 for fixing the power board 404 with screws or the like, and a power board fixing portion 333. The right duct 302 is provided with right duct protrusions 334 at positions corresponding to the front end IC 600 mounted on the main board 400, the image processing IC 602, and the memory 603. The size of the right duct protrusion 334 is almost the same as that of a heat radiation rubber (not shown) attached to the right duct protrusion 334. As a result, the heat generated by the front-end IC 600, the image processing IC 602, and the memory 603 can be transmitted to the right duct convex portion 334 via the heat dissipation rubber.

  As shown in FIG. 21B, inside the right duct 302, a right duct fin 331 and a fan rubber 306 incorporating the fan 300 are held between a right duct upper wall 336 and a right duct lower wall 337. A fan rubber holding rib 335 is provided. A plurality of right duct fins 331 are arranged in parallel in the height direction of the camera body 100 at predetermined intervals in order to increase the heat radiation area. Also, right duct ribs 338 are provided on the right duct upper wall 336 and the right duct lower wall 337 at the left and right ends of the right duct fin 331, respectively. The purpose of installing the right duct rib 338 will be described later.

  Next, the left duct 303 will be described with reference to FIG. 22A is a perspective view of the left duct 303, and FIG. 22B is a view of the left duct 303 shown in FIG.

  As shown in FIG. 22A, the left duct 303 is provided with a sub-board fixing portion 342 for fixing the sub-board 401 and the sub-board heat dissipation plate 411 with screws or the like. Further, the left duct 303 is provided with a left duct protrusion 344 at a position corresponding to the back-end IC 611, the format conversion IC 612, etc. mounted on the sub-board 401. The size of the left duct protrusion 344 is almost the same as the heat radiation rubber attached to the left duct protrusion 344. This makes it possible to transmit the heat generated by the back-end IC 611 and the format conversion IC 612 to the left duct protrusion 344 via the heat dissipation rubber. Further, the left duct 303 is provided with a left duct fixing portion 347 for fixing the left duct rear 304.

  As shown in FIG. 22B, inside the left duct 303, a plurality of left duct fins 341 arranged in parallel in the height direction of the camera body 100 at predetermined intervals are provided in order to expand the heat radiation area. Further, a separation wall 343 is provided at a substantially central portion inside the left duct 303. When the right duct 302 and the left duct 303 are combined, the separation wall 343 separates the inner space into upper and lower parts. By incorporating the right duct upper wall 336 and the right duct lower wall 337 of the right duct 302 into the left duct upper wall 345 and the left duct lower wall 346 of the left duct 303, the gap of the fan duct unit 301 is eliminated and dust or the like is eliminated. It can prevent rainwater from entering.

  Next, the left duct rear 304 will be described with reference to FIG. 23A is a perspective view of the left duct rear 304, and FIG. 23B is a perspective view of the left duct rear 304 shown in FIG.

  As shown in FIG. 23A, the left duct rear 304 is provided with a board fixing portion 353 for fixing the video compression circuit board 403 with screws or the like. Further, the left duct rear 304 is provided with a heat dissipation flat portion 355 at a position corresponding to the video compression IC 631 mounted on the video compression circuit board 403. The heat generated by the image compression IC 631 can be transmitted to the heat radiating flat portion 355 via a heat radiating rubber (not shown).

  As shown in FIG. 23B, a plurality of left duct rear fins 351 for expanding the heat dissipation area and two fan mounting portions for holding the fan rubber 306 in which the fan 300 is mounted are provided inside the left duct rear 304. 352 is provided. In addition, a separation wall 354 is provided at a substantially central portion inside the left duct rear 304. The separation wall 354 separates the internal space into two when the left duct rear 304 is incorporated in the right duct 302. This prevents the exhaust air from one of the two fans 300 from being sucked into the other fan 300, so that the air heated by the right duct fin 331 and the left duct fin 341 is discharged to the outside of the camera body 100. It can be surely exhausted.

  Next, the fan duct unit 301 will be described with reference to FIG. FIG. 24 is an exploded perspective view of the fan duct unit 301. As shown in FIG. 24, the fan rubber 306 is incorporated in the fan incorporating portion 352 of the left duct rear 304 with the outer rib 321 in contact with the fan rubber 306, whereby the fan 300 is held. By doing so, the vibration generated by the rotation of the blades 313 of the fan 300 does not affect the camera body 100. Further, since the outer rib 321 is also in contact with the right duct 302, it also has an effect of preventing backflow of air in the fan duct unit 301.

  FIG. 25 is a cross-sectional view taken along the line AA of FIG. FIG. 26 is a sectional view taken along the line BB of FIG. Note that FIG. 26 is a cross-sectional view at the position of the right duct rib 338 of the right duct 302 shown in FIG.

  As shown in FIG. 25, in the fan duct unit 301, the left duct fin 341 of the left duct 303 is disposed between the right duct fins 331 that are adjacent to each other in the height direction (the vertical direction in the figure) of the camera body 100 of the right duct 302. Has been inserted. That is, the plurality of right duct fins 331 and the plurality of left duct fins 341 are alternately arranged in the height direction of the camera body 100. Accordingly, the air sucked by the fan 300 can cool the right duct 302 and the left duct 303 by passing through the gap between the right duct fin 331 and the left duct fin 341.

  A duct upper space 361 is formed between the right duct upper wall 336 of the right duct 302 and the uppermost left duct fin 341 of the left duct 303. Further, a lower duct space 362 is formed between the lower right duct wall 337 of the right duct 302 and the lowermost left duct fin 341 of the left duct 303. The duct upper space 361 and the duct lower space 362 are both wider than the space between the right duct fin 331 and the left duct fin 341.

  Here, in the present embodiment, as shown in FIG. 26, the right duct rib 338 is provided in the right duct 302 to partially reduce the volume of the duct upper space 361 and the duct lower space 362. As a result, the air flowing through the duct upper space 361 and the duct lower space 362 is made difficult to flow, the flow velocity of the air in the central portion of the fan duct unit 301 is increased, and the heat dissipation effect of the fins 331 and 341 is enhanced.

  As described above, in the present embodiment, the card board unit 261 that requires a large space in the width direction of the camera body 100 is arranged in the space 307 in the substantially U-shaped inner portion of the fan duct unit 301. As a result, the camera body 100 can be thinned in the width direction, and the camera body 100 can be downsized.

  Further, in the present embodiment, the main board 400 having a relatively large area is arranged outside the cooling section 326 of the fan duct unit 301 having a substantially U shape, and the sub-board having a relatively small area is arranged inside the cooling section 326. 401 can be arranged. As a result, the heat generated by the heating elements mounted on the substrates 400 and 401 can be exchanged by the cooling unit 326 to be cooled, and the heat radiation efficiency can be improved.

  Further, in the present embodiment, the card cover 210 of the card board unit 261 and the external input / output terminal portion 220 are arranged so as to project to the outside of the camera body 100 with respect to the intake port 230 and the exhaust port 240. Therefore, even when the side surface of the camera body 100 approaches the wall at the time of shooting, the intake port 230 and the exhaust port 240 are not closed by the wall 215, and an air intake / exhaust space can be secured. As a result, the flow of the intake and exhaust air shown by the arrow in FIG. 4B is not hindered, heat can be efficiently dissipated, and the camera body 100 can be sufficiently cooled.

  The configuration of the present invention is not limited to those exemplified in the above embodiment, and the material, shape, size, form, number, arrangement location, etc. can be appropriately changed without departing from the scope of the present invention. Is.

100 camera body 230 intake port 240 exhaust port 300 fan 301 fan duct unit 325 intake unit 326 cooling unit 327 exhaust unit 400 main board 401 sub-board

Claims (9)

An imaging device having an intake port and an exhaust port on one side of the device body, and having a fan and a duct inside the device body,
The duct has an intake part having a duct structure communicating with the intake port , an exhaust part having a duct structure communicating with the exhaust port, and a cooling part having a duct structure located between the intake part and the exhaust part. Then
The intake part and the exhaust part are integrated with the cooling part and extend in a direction intersecting with the cooling part,
The intake section sends out air sucked from the intake port by driving the fan to the cooling section, the cooling section performs heat exchange with the air sent out from the intake section, and the exhaust section, The cooling unit is configured to discharge the air warmed by heat exchange from the exhaust port,
A first substrate is disposed on the surface of the cooling unit on the side where the intake port and the exhaust port are opened, and a second substrate is disposed on the surface of the cooling unit opposite to the surface on which the first substrate is disposed. Board is placed,
In a space inside the duct surrounded by the cooling unit, the intake unit, and the exhaust unit, a mounting unit and an input / output terminal unit to which a recording medium is detachably mounted are provided from the intake port and the exhaust port. An imaging device, wherein the imaging device is arranged so as to project outward in the width direction of the device body. The imaging device according to claim 1, wherein the area of the second substrate is larger than the area of the first substrate. The power consumption of the second substrate is larger than the power consumption of the first substrate, and the imaging device according to claim 1 or 2. The image pickup device according to claim 1, wherein a video processing IC that performs a predetermined process on a video signal is mounted on the second substrate. The image pickup apparatus according to claim 1, wherein the mounting section is provided with a cooling fan for cooling the recording medium. Before Symbol intake section, the imaging apparatus according to substantially any one of claims 1 to 5, characterized in that extends in a direction intersecting at right angles to the cooling unit. Before Symbol exhaust unit, the imaging device according to any one of claims 1 to 6, characterized in that it extends in a direction intersecting at an obtuse angle with respect to the cooling unit. The imaging device according to any one of claims 1 to 7 , wherein the fan is provided at a connection portion between the exhaust portion and the cooling portion of the duct. The intake port is disposed on the front side which is the subject side of the device main body, the exhaust port may be any one of claims 1 to 8, characterized in that arranged on the rear side of the device body The imaging device according to.