JP2016045270A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure that efficiently dissipates the heat of a board inner layer.SOLUTION: An electronic apparatus has a plurality of substrates and a flexible substrate that connects between the plurality of substrates, a heat radiation fan and a heat radiation duct are disposed between the plurality of substrates, and the flexible substrate passes through the duct.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a heat dissipation structure for an electronic device incorporating a fan.

  In conventional electronic devices, an imaging device using a heat-generating substrate itself as a component surface of a heat-dissipating duct in a heat-dissipating mechanism using a fan is disclosed (see Patent Document 1).

JP 2009-71722 A

  However, the conventional example has a problem in that the heat dissipation efficiency does not increase because the heat dissipation of the surface of the substrate is not performed and the heat of the inner layer of the substrate is not positively dissipated.

  The configuration of the electronic device according to the present invention includes an airflow generation means for forcibly generating an air flow, an airflow induction means for taking in air from outside the product, inducing an airflow in a target path, and discharging the air to the outside of the product, A board necessary for operating an electronic device is provided, the board is provided with a flexible board connecting means, a sheet-like member using a metal thin film is connected to the flexible board connecting means, and the sheet-like member is the airflow guide The inside of the means is inserted.

  According to the present invention, not only the heat of the substrate surface layer but also the heat radiation inside the substrate can be efficiently performed.

1 is a front perspective view of an imaging apparatus according to an embodiment of the present invention. 1 is a rear perspective view of an imaging apparatus according to an embodiment of the present invention. FIG. 3 is a control diagram of the imaging apparatus according to the embodiment of the present invention. 1 is an exploded view of an imaging apparatus according to an embodiment of the present invention. Sectional drawing of the sensor part of this invention Example. The exploded view of the sensor part of this invention Example. The exploded view of the duct part periphery of this invention Example. Sectional drawing of the duct part periphery of this invention Example. The perspective view of the fan part of this invention Example. The exploded view of the fan part of this invention Example. Sectional drawing of the duct part of an Example of this invention. Sectional drawing around the heat radiation of the embodiment of the present invention. The perspective view at the time of battery insertion of this invention Example. The perspective view of the partial cross section at the time of battery insertion of this invention Example. The perspective view which shows the connection state of the battery terminal and flexible cable of this invention Example. The front perspective view in the state where the lens of the imaging device of the present invention example was removed.

  Hereinafter, preferred embodiments of an imaging apparatus according to the present invention will be described in detail with reference to the accompanying drawings. In the description, the subject side is the front and the photographer side is the rear. As for the left and right, the right side is the R side and the left side is the L side as viewed from the subject. In addition, it demonstrates centering on the part to which this invention relates, and the part which is not directly related to invention is abbreviate | omitted.

<First Embodiment>
≪Appearance explanation≫
FIG. 1 is a perspective view showing an appearance of an imaging apparatus according to the present invention. A replaceable lens unit 11 is attached to the main body 1. FIG. 16 is a perspective view showing a state where the lens unit 11 is removed. An annular mount 12 is provided on the front surface of the main body. At the time of photographing, the lens portion 11 is fixedly mounted substantially concentrically by a locking portion (not shown) of the mount portion 12.

  Microphones 16 are provided on the left and right sides of the front surface of the main body 1 with the lens portion 11 in between. A power button 17, a plurality of vertically arranged intake ports 22, and a battery lid 24 that can be opened and closed are provided at the lower rear portion of the main body 1 on the R side.

  FIG. 2 shows a perspective view from the rear. The intake air A is sucked in from the intake port 22, passes through cooling of the main body 1, and is discharged as exhaust B from the exhaust port 23 on the L side. The exhaust port 23 is a plurality of openings arranged vertically on the L side surface. An image display unit 21 with a touch panel function is provided on the back of the main body 1 so that images can be confirmed and various setting operations can be performed. A trigger button 13 for starting and stopping recording and a zoom lever 15 for performing zooming operation of a lens having an angle of view are provided on the upper side of the main body 1 on the L side.

≪Operation control explanation≫
FIG. 3 is a block diagram showing a configuration of operation control of the main body 1 of the present invention. The main body 1 includes an optical lens group including an optical control system such as focus and zoom, a lens 11 including a diaphragm, a main imaging unit 502 including imaging electrical components such as a CCD, a camera signal processing unit 503, a compression / decompression processing unit 504, and an image display. Unit 21, recording / playback processing unit 506, card control unit 507 for controlling the memory card 519, large-capacity internal memory control unit 508 for controlling the large-capacity built-in memory 520, audio signal processing unit 510, memory 511, memory control unit 512, Operation unit 514, digital I / F 515 used for connection with external device 521, input / output unit 516 for connection with external device 522, GPS reception unit 524, GPS signal processing unit 525, power supply control unit 517, battery 523, and A fan unit 850 is provided for cooling the main body. The functional blocks are connected to each other via a data bus 518 so that data communication can be performed.

  In such a main body 1, the memory 511 has a program storage area and a data work area. The memory 511 is used by time sharing in each functional block via the data bus 518, and is controlled and managed by the memory control unit 512.

  The CPU 513 is a central processing circuit that performs overall control of the entire main body 1 by executing a predetermined program. The operation unit 514 includes the image display unit 21 with the touch panel, the power button 17, the trigger button 13, and the like. The power button 17 is pressed to turn on / off the power. The trigger button 13 can be pressed / started to start / stop moving image shooting. Other operations are performed by the image display unit 21 with a touch panel. As described above, the operation unit 514 has a function of instructing the CPU 513 to perform an operation based on a key operation from the user.

  The digital I / F 515 exchanges signals with the external device 521 in accordance with a standard such as USB (not shown). A memory card 519 is a detachable flash memory such as an SD card or a compact flash (registered trademark), in which shooting data and audio data are recorded. The power supply control unit 517 includes a battery detection circuit, a DC-DC converter, a switch circuit that switches a block to be energized, and the like, and detects whether or not the battery 523 is attached, the type of battery, and the remaining battery level. The battery 523 is lithium ion or the like and supplies power to the imaging device 1.

  The GPS receiving unit 524 acquires position and time data from GPS satellites. This data is processed by the GPS signal processor 525, and the position of the GPS receiver 524 and the time at that position are calculated. In the imaging device 1, the calculated position information and time information are written in the large-capacity internal memory 520 or the memory card 519 together with the image data. At the time of reproduction, the position information and time information can be referred to and used for organizing data and storage.

  Next, the photographing operation, recording operation, and reproduction operation of the main body 1 will be described. For example, when a photographing operation and a recording operation are instructed by the operation unit 514, the light from the subject becomes an optical signal whose predetermined brightness, angle of view, focus, and the like are controlled by the lens 11, and is input to the main imaging unit 502. Input. The main imaging unit 502 converts the input optical signal into an electrical signal and outputs it to the camera signal processing unit 503. The camera signal processing unit 503 converts this electric signal into a digital image signal. The image signal is subjected to signal processing such as color separation, gradation correction, and white balance adjustment, and then output.

  The audio signal processing 510 outputs the audio signal as audio data by gain-controlling the audio signal input from the microphone 16 to a predetermined level and digitizing it. The compression / decompression processing unit 504 compresses and encodes the image data output from the camera signal processing unit 503 and the audio data output from the audio signal processing unit 510 using a predetermined compression encoding method. Shooting data to be compressed and encoded processed by the compression / decompression processing unit 504 is displayed on the image display unit 21, and the operation status of the main body 1 is also displayed as necessary.

  The recording / playback processing unit 506 performs error correction coding processing, modulation processing, and the like on the data after compression coding obtained by the compression / decompression processing unit 504, and further performs synchronization, ID, GPS reception unit 524, and GPS signal processing. Data such as position information and time information calculated from the unit 525 is added and converted into a form suitable for recording, and then recorded on a recording medium such as a large-capacity internal memory 520 or a memory card 519. At this time, the large-capacity internal memory control unit 508 performs recording control of the large-capacity internal memory 520, and the card control unit 507 performs recording control of the memory card 519.

  On the other hand, when a reproduction operation is instructed by the operation unit 514, the recording / reproduction processing unit 506 detects original digital data from data read from the large-capacity internal memory 520 or the memory card 519, and performs processing such as error correction and demodulation. Apply. Further, a clock synchronized with the reproduction data is generated by a PLL circuit.

  The compression / decompression processing unit 504 performs decompression processing corresponding to a predetermined compression encoding method on the data output from the recording / playback processing unit 506, and acquires shooting data and audio data before compression encoding. The image display surface 21 displays the reproduction data obtained by the compression / decompression processing unit 504.

  When the operation unit 514 instructs to record input data from the digital I / F 515, the CPU 513 inputs image data or audio data from the external device 521 in a digital signal state using the digital I / F 515. The data is sent to the recording / playback processing unit 506. At this time, it is assumed that the image data and audio data from the external device 521 have already been encoded, and the recording / playback processing unit 506 performs processing necessary for recording on the input data as described above to perform a large-capacity internal processing. Recording is performed on a recording medium such as the memory 520 or the memory card 519.

  When the operation unit 514 instructs to record an input signal from the input / output unit 516, the CPU 513 controls the input / output unit 516 and inputs an image and audio signal output from the external device 522.

  The input / output unit 516 converts the image and audio signals output from the external device 522 into digital data and outputs the digital data to the memory 511. The CPU 513 outputs the image and audio data stored in the memory 511 to the compression / decompression processing unit 504, compression-codes them, and sends them to the recording / reproduction processing unit 506.

  As described above, the recording / playback processing unit 506 performs processing necessary for recording on the encoded data and records it on a recording medium such as the large-capacity internal memory 520 or the memory card 519. When the power is turned on, the fan unit 850 starts driving and supplies and exhausts air to and from the duct unit 800.

≪Internal outline explanation≫
FIG. 4 shows an outline of the inside of the main body. A front cover 31 having a mount portion 12 is provided on the front side of the main body, and a back cover 32 having an image display portion 21 is provided on the rear side. Between the front cover 31 and the back cover part 32, a chassis 33, a sensor unit 700, a control board 34, and a duct part 800 are arranged in this order from the front.

  Each of the sensor units 700 is fixed to the chassis 33 using screws (not shown), and the chassis 33 is fixed to the front cover 31. Further, the control board 34 and the duct portion 800 are each fixed to the back cover portion 32 by screws (not shown). A flexible cable 830 is inserted through the duct portion 800, the contact portion 831 is exposed from the upper surface of the duct portion 800, and the terminal connection portion 832 is exposed from the lower surface of the duct portion 800.

≪Sensor unit configuration explanation≫
The configuration of the sensor unit 700 is shown in FIGS. FIG. 5 is a cross-sectional view of the sensor unit 700. FIG. 6 is an exploded perspective view of the sensor unit 700. The sensor unit 700 is arranged in the order of the sensor 710, the sensor substrate 720, and the sensor plate 730 from the front side. The sensor 710 includes a terminal foot portion 712 on the outer periphery, and is mounted on the sensor substrate 720 with solder to form the main imaging unit 502 described above. The sensor substrate 720 includes a square hole 721 through which the sensor bottom 711 of the sensor 710 is exposed, and the sensor bottom 711 is exposed when the sensor 710 is mounted.

  The sensor plate 730 is made of a metal sheet metal or metal die-cast, and has a convex portion 731 having a shape in which the vicinity of the center is greatly projected forward. The sensor bottom 711 is bonded and fixed to the front surface of the convex portion 731 to form a sensor unit 700. The sensor substrate 720 includes the camera signal processing unit 503 described above.

≪Explanation of heat dissipation structure≫
FIG. 7 shows an exploded view of the control board 34 and the duct portion 800. FIG. 8 shows a cross-sectional view of the control board 34 and the duct portion 800. A duct portion 800 is provided behind the control board 34. The duct part 800 is enclosed in a form in which a duct rear cover 860 having a flat box shape sandwiches the fan part 850 and the flexible cable 830 in the same manner as the duct front cover 810 having a flat box shape.

  As shown in FIG. 7, notches 814, 815, and 816 are provided on the outer periphery of the duct front cover 810. On the side surface on the R side of the duct front cover 810, there is provided an intake opening 812 in which a wall 811 is formed with a rectangular rib on the R side. An opposite surface of the intake opening 812 is provided with an exhaust opening 817. Inside the duct front cover 810, a plurality of heat radiating ribs 813 are arranged along the flow of the intake air flow A to the exhaust air flow B. Several ribs on the lower side of the heat dissipating ribs 813 draw a gentle curve in the fan center direction as they approach the fan center. This is for efficiently flowing air into a fan intake hole 852 described later.

  The duct rear cover 860 has a projected external shape from the lens side that is substantially the same as the shape obtained by removing the wall 811 from the duct front cover 810. A plurality of ribs 863 substantially parallel to the heat dissipating ribs 813 are provided. The duct front cover 810 and the duct rear cover 860 are tightly fitted and include the fan portion 850.

  FIG. 9 is a perspective view of the fan unit 850. FIG. 10 is an exploded perspective view of the fan unit 850 with the fan cover 857 removed. FIG. 11 shows a cross-sectional view of the duct portion 800. The fan unit 850 includes a fan case 855 and a fan cover 857 formed of a thin metal plate, and includes a motor 856 and a wing unit 851 connected to a drive board (not shown) and the bottom. The wing portion 851 is press-fitted to the output shaft 854 of the motor 856.

  The fan case 855 and the fan cover 857 have substantially the same projection from the front side, and the R side has a semicircular shape. The motor is screwed with a screw (not shown) near the center of the semicircular shape. A rectangular fan exhaust port 853 is formed on the L side of the fan unit 850. In the wing portion 851, a plurality of substantially long and thin wings are radially arranged. The motor can be driven by connecting the fan flexible cable 858 to the control board 34. At the bottom of the fan case, a plurality of fan air intake holes 852 are provided in a projected portion with the wing portion 851.

  11 and 12 show the flow of airflow when the fan unit 800 is driven. When the fan is driven, the intake air flow A is sucked from the intake hole 22 of the back cover portion 32, and then enters the duct portion 800 through the intake opening 812. The intake air flow A flows along the ribs 863 and the heat radiating ribs 813, takes heat inside the duct portion 800, and then sucks into the fan through the fan intake holes 852. Thereafter, the air is pushed out by the wing portion 851, passes through the exhaust hole 862, and finally exhausts as an exhaust flow B from the exhaust port 23 of the back cover.

  The state of the flexible cable 830 is shown in FIG. 7 and FIG. The tips of the heat dissipating rib 813 and the rib 863 slightly enter between the mating ribs. For this reason, the flexible cable 830 is deformed into a bellows shape, and is assembled in a state where it is in contact with the tips of both ribs. The notch 814 and the notch 816 are exposed to the outside of the duct portion 800. The first contact portion 831 of the flexible cable 830 exits from the upper portion of the duct 800 and is connected to the first connector 341 of the control board 34. Similarly, the fan flexible cable 858 of the fan unit 850 is exposed from the above-described notch 815 and connected to the second connector 342 of the control board 34.

  FIG. 13 shows a state when the battery is inserted. The battery 18 has a prismatic shape, and includes an insertion tip surface at the tip in the insertion direction and a plurality of slits 181 on one surface adjacent to the tip surface. A contact (not shown) is provided inside the slit. A battery housing portion 321 is formed in the back cover portion 32, and an insertion port 323 is open on the side surface of the back cover 32. A rotation shaft hole 322 is provided above and below the front side of the insertion port 323. A shaft portion (not shown) of the battery lid 24 is rotatably engaged with the rotation shaft hole 322. An engaging claw 241 having flexibility is provided on the opposite side of the battery lid 24 to the rotating shaft, and the insertion port 323 is opened and closed.

  A terminal hole 324 is formed in a wall in front of the battery housing 321 as viewed from the insertion port, and the battery terminal 19 is inserted so as to close the hole. The battery terminal portion 19 is provided with a plurality of terminal pieces processed from sheet metal at the center, and the terminal piece 192B is exposed on the front side and the terminal piece 192A is exposed on the back side. FIG. 14 shows a state in which a part of the back cover 32 is cut out so that the inside of the battery housing portion can be seen. The terminal piece 192A is exposed from the terminal hole 324, and the terminal piece 192A is fitted and electrically connected to the terminal portion in the slit 181 when the battery 18 is stored.

  FIG. 15 shows the connection between the battery terminal 19 and the flexible cable 830. A terminal insertion hole is opened at one end of the flexible cable 830, and the periphery thereof includes a terminal connection portion 832 that has been subjected to a solderable process. The terminal piece 192B is fixed to the terminal connecting portion 832 with solder.

≪Explanation of heat generation and heat release≫
When the main body 1 is turned on, the electrical components mounted on the control board 34 generate heat. As shown in FIG. 8, the front surface of the duct front cover 810 is in contact with electrical components on the control board 34. The material of the duct front cover is a material having a high thermal conductivity such as metal, and the heat of the electrical component is transferred to the entire duct front cover 810 including the heat radiation rib 813. The control board 34 has components mounted on both sides, and a pattern layer is also formed on the inner layer. The heat of the control board is generated by the electric component, and is transferred to the inner layer of the board through the junction between the electric part and the board in addition to the surface of the electric part.

  One end of the flexible cable 830 is connected to the first connector 341 and supplies battery power to the control board 34. As shown in FIG. 8, the flexible cable 830 passes through the duct portion 800 in a bellows shape. The air flow by the fan flows in a direction perpendicular to the paper surface. The contact portion 831 of the flexible cable and the contact portion of the first connector 341 are made of metal and have extremely high thermal conductivity. The flexible cable 830 is electrically conductive by a thin film of metal such as copper. That is, the heat of the control board 34 can be put into the air flow in the duct portion with high conductivity. In order to supply power to the battery, it is necessary to pass a higher current than in general signal transmission. The metal thin film of a flexible cable also needs to have a larger thickness or area than in general signal transmission, and has a heat capacity. Is suitable for heat dissipation parts. In addition, since the wind from the fan flows on both sides of the flexible cable 830, heat can be efficiently dissipated.

  Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined.

  For example, in the present invention, a flexible cable for a battery is used, but a flexible cable for other purposes may be used. Since the purpose is to conduct heat with a thin film, it is possible to simply connect a sheet with high thermal conductivity such as copper or aluminum to the connector on the board.

  In the present invention, the duct front cover 810 is in direct contact with the electrical components of the control board 34, but heat dissipation rubber for heat dissipation or heat transfer grease may be used.

  In the present invention, the flexible cable connected to the control board 34 that is in contact with the duct part 800 is passed through the duct part 800, but the flexible cable for connection to the board that is not in contact with the duct part 800 is used. But it doesn't matter.

  In the present invention, the duct front cover 810 and the duct rear cover 86 are provided with a plurality of ribs. However, any form may be used as long as the wind of the fan in the duct can be applied to the surface of the flexible cable 830.

  Further, in the present embodiment, the imaging device of the interchangeable lens has been described, but a built-in lens may be used.

1 body, 11 lens section, 12 mount section, 13 trigger button,
15 zoom lever, 16 microphone, 17 power button, 18 battery,
19 Battery terminal part, 192A Flexible cable side terminal piece,
192B battery-side contact piece, 21 display unit with touch panel function, 22 air inlet,
23 exhaust port, 24 battery cover, 31 front cover, 32 back cover part,
33 Chassis, 34 Control board, A Intake flow, B Exhaust flow

Claims (4)

Airflow generation means that forcibly generates air flow, airflow induction means that takes air from outside the product, guides the airflow to the target path, and discharges it to the outside of the product, and a substrate necessary to operate the electronic equipment A flexible board connecting means is provided on the board, and a sheet-like member using a metal thin film is connected to the flexible board connecting means, and the sheet-like member is inserted through the airflow guiding means. Electronic equipment. The electronic device according to claim 1, wherein the airflow generating means is a fan that rotates a blade by a motor. The electronic device according to claim 1, wherein the sheet-like component is a flexible substrate. The electronic device according to claim 3, wherein the flexible substrate supplies battery power to the substrate.