JP2017139584A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem in which, in the conventional imaging device, when any one of a plurality of fans fails, necessary cooling cannot be performed, and the photographing is stopped so as not to destroy the imaging device.SOLUTION: The imaging device includes: a duct serving as a ventilation path from an intake port to an exhaust port; air blowing means for letting air flow in the duct; a first cooling portion including a heat radiating portion for transferring heat to the air in the duct; and a second cooling portion sharing a duct outer wall with the first cooling portion. An opening that can be opened and closed between the air blowing means and the heat radiating portion is provided on the duct outer wall shared by the first cooling portion and the second cooling portion.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an imaging apparatus including a fan.

  In recent years, the power consumption of imaging devices has increased, and cooling by forced air cooling is required. In addition, the imaging apparatus is required to capture a wider variety of images without limiting the imaging position and composition by shortening the width dimension in the left-right direction and the thickness dimension in the optical axis direction.

  On the other hand, a method of shortening the thickness dimension in the optical axis direction of the image pickup apparatus by cooling a thin heat sink / duct with a fan is proposed (see Patent Document 1). Also, a method of cooling by using a plurality of fans when power consumption is high and cooling capacity is insufficient with one fan has been proposed (see Patent Document 2).

JP 2014-45345 A Japanese Patent No. 425731

  However, the prior example of Patent Document 1 may have insufficient cooling capacity. Next, in the prior example of Patent Document 2, since a plurality of fans are arranged at different locations, the thickness dimension in the optical axis direction of the imaging device cannot be shortened. In addition, if any one of the plurality of fans fails, there is a problem that necessary cooling cannot be performed and photographing is stopped so that the imaging apparatus is not destroyed.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with an intake port for taking in air from the outside of the main body and an exhaust port for discharging air to the outside of the main body, from the intake port to the exhaust port. A first cooling section comprising a duct section serving as a ventilation path, a blowing means for flowing air in the duct, a heat radiating section for transferring heat to the air in the duct section, and the first cooling In the imaging device including the second cooling unit having a duct outer wall shared with the unit, and including the first cooling unit and the heat source unit thermally connected to the second cooling unit, the first cooling unit And the second cooling unit has an opening that can be opened and closed between the air blowing unit and the heat radiating unit on the shared duct outer wall.

  The invention according to claim 2 is provided with a failure detection means for detecting a failure of the blower means and a display unit for transmitting a state to a user, and the failure detection means detects that the blower means has failed. 2. The imaging apparatus according to claim 1, further comprising a failure display control unit that performs a display informing the display unit of a failure of the blowing unit.

  The invention according to claim 3 is provided with an opening / closing means for opening / closing the opening, and when the failure detecting means detects that the blowing means has failed, the opening / closing means opens the opening. The imaging apparatus according to claim 2, further comprising an opening / closing control unit configured to make the opening state.

  According to the imaging device of the present invention, the cooling capacity can be improved while the width dimension in the left-right direction and the thickness dimension in the optical axis direction are reduced. In addition, even if any one of the plurality of fans breaks down, the imaging apparatus can be cooled, so that shooting can be continued.

It is a block diagram which shows the structural example of the imaging device by this embodiment. It is an external appearance perspective view of the imaging device by this embodiment. It is an internal structure schematic diagram seen from the Z direction of the imaging device according to the present embodiment. It is an internal structure schematic diagram seen from the X direction of the imaging device by this embodiment. It is the cooling part structure schematic diagram seen from the Y direction of the imaging device by this embodiment. It is a flowchart which shows the opening part opening / closing control process by the imaging device of this embodiment.

  Hereinafter, the present embodiment will be described with reference to the drawings.

  FIG. 1 is a block diagram illustrating a configuration example of the imaging apparatus main body 100 according to the present embodiment. FIG. 2 is an external perspective view of the imaging apparatus according to the present embodiment. FIG. 3 is a schematic diagram of the internal structure as viewed from the Z direction of the imaging apparatus according to the present embodiment. FIG. 4 is a schematic diagram of the internal structure of the imaging apparatus according to the present embodiment viewed from the X direction. FIG. 5 is a structural schematic diagram of the cooling unit viewed from the Y direction of the imaging apparatus according to the present embodiment.

  1 to 5, an image pickup unit 101 includes a photographing lens 300, an image pickup element 301 including a CCD or CMOS element that converts an optical image into an electric signal, and an A / D converter that converts an analog signal into a digital signal. The subject image is converted into a digital signal, and photographed image data is output.

  The voice input unit 110 includes a microphone that converts voice into an electrical signal, and outputs voice data. The ROM 103 is an electrically erasable / recordable memory, such as an EEPROM. The ROM 103 stores constants, programs, etc. for the operation of the CPU 102. Here, the program is a program for executing various flowcharts described later in the present embodiment. The CPU 102 controls the entire imaging apparatus main body 100. By executing the program recorded in the ROM 103 described above, each process of the present embodiment to be described later is realized.

  A RAM 104 is a system memory, a work memory, an image memory, and an audio memory, and a RAM or the like is used. In the RAM 104, constants and variables for operation of the CPU 102, programs read from the ROM 103, and the like are expanded.

  The temperature detection unit 105 is disposed in the vicinity of the substrate 303 on which the CPU 102, the ROM 103, and the RAM 104 are disposed. The temperature detection unit 304 that outputs temperature data of the substrate 303 is disposed in the vicinity of the image sensor 301. The image sensor includes a temperature detection unit 302 that outputs temperature data 301. A thermistor or the like is used for each temperature detection unit.

  The display unit 106 displays an image using image data that the CPU 102 transmits to the RAM 104. A liquid crystal panel, an organic EL, or the like is used for the display unit 106.

  The recording unit 107 records image data and audio data that the CPU 102 transmits to the RAM 104. The recording unit 107 is a recording medium such as a memory card for recording image data and audio data, and includes a semiconductor memory, a magnetic disk, a magnetic tape, and the like.

  An operation unit 108 indicates a part related to an operation including a shutter button 201 provided on the imaging apparatus main body 100, a power button 200, a touch panel 202 provided to overlap the display unit 106, and the like. The power button 200 turns on and off the power of the imaging apparatus main body 100. When the shutter button 201 is operated, image data and audio data to be photographed are stored in the recording unit 107. The touch panel 202 acts as various function buttons by selecting and operating various icons displayed on the display unit 106 provided in an overlapping manner.

  Examples of function buttons include a shooting mode switching button, a zoom button, and a menu button. For example, when the zoom button is pressed, the zoom function is started and the angle of view suitable for the shooting scene can be obtained. The user can make various settings intuitively by operating the touch panel 202 in which the buttons displayed on the display unit 106 are overlapped.

  The fan 109 includes an intake port 203 for taking outside air into the imaging apparatus main body 100, an exhaust port 204 for discharging air from the imaging apparatus main body 100 to the outside, and a ventilation path between the intake port 203 and the exhaust port 204. A first fan 306 for passing air through the first duct 305 and a duct outer wall 501 shared with the first duct 305, and serving as a ventilation path for the intake port 203 and the exhaust port 204. A second fan 402 for passing air through the second duct 401 is configured. The CPU 102 has a fan control means for controlling the number of rotations by controlling the motor driving the fan 109 by making the input voltage value to the motor or the input voltage called PWM control a rectangular wave.

  The CPU 102 applies a voltage to the fan 109 by the rotation speed detecting means for detecting the fan speed by the FG signal output from the fan 109, and the fan control means, but the fan speed is lower than a predetermined value. In such a case, a failure detection means for determining a fan failure is provided.

  Other configurations used in the imaging device include a power supply unit for driving the imaging device body, a terminal unit for input / output of video / audio signals, a strobe / light unit for illuminating a subject, etc. In order to use a well-known fact, the illustration and detailed description are omitted here.

  Next, the cooling unit will be described. When the first fan 306 is driven, external air is sucked from the intake port 203 as indicated by an arrow W and passes through the first duct 305. The first heat radiating portion 307 provided in the first duct 305 is made of a thin plate-like metal or the like, and transfers heat from the surface by forced convection to the air passing through the first duct. The high temperature air is discharged from the exhaust port 204 to constitute the first cooling unit. When the second fan 402 is driven, external air is sucked from the intake port 203 as indicated by an arrow W and passes through the second duct 401.

  The second heat radiation part 403 provided in the second duct 401 is made of a thin plate-like metal or the like, and heat is transferred from the surface by forced convection to the air passing through the second duct. The high temperature air is discharged from the exhaust port 204 to constitute the second cooling unit. The outer wall of the first duct 305 and the outer wall of the second duct 401 are separated by the shared duct outer wall 501. The substrate 303 is thermally connected to the first duct 305 via a first heat conducting member 308. The substrate 303 is thermally connected to the second duct 401 via a second heat conducting member 404.

  By taking the heat of the first duct 305 and the second duct 401, the temperature of the substrate 303 is lowered. Since the first cooling unit and the second cooling unit have independent ventilation paths, the heat dissipation is achieved by setting the rotational speeds of the first fan 306 and the second fan 402, respectively. Each performance can be set as required.

  The shared duct outer wall 501 is provided with an opening 502 that can be opened and closed between the heat radiating portion and the fan. When the opening / closing means is manually operated by removing the partition plate by hand, photographing can be continued by manually removing the partition plate and opening the opening 502 when a failure of the fan is found. Further, when a fan failure is detected by the failure detection means, a failure display control means for notifying the user that the fan has failed may be provided on the display unit 106 to encourage removal of the partition plate.

  Opening / closing control for opening the opening / closing means to move the partition plate electrically using a motor or plunger, and removing the partition plate by the opening / closing means when the failure detection means detects a fan failure. By providing the means, the opening 502 may be automatically opened and closed.

  FIG. 6 is a flowchart of the opening / closing control process in the present embodiment. Each process in this flowchart is realized by the CPU 102 developing and executing a program stored in the ROM 103 on the RAM 104.

  In FIG. 6, in step S <b> 601, the CPU 102 determines whether there is a power ON command using the power button 200. If the CPU 102 determines that there is no power ON command from the power button 200, the process returns to step S601. If the CPU 102 determines that a power-on command has been given by the power button 200, the process proceeds to step S602.

  In step S602, the CPU 102 causes the fan control unit to rotate the first fan 306 and the second fan 402, and the process proceeds to step S603.

  In step S603, the CPU 102 determines whether one of the first fan 306 and the second fan 402 has a failure by the failure detection means. If the CPU 102 determines that neither the first fan 306 nor the second fan 402 has a failure, the process returns to step S603. If the CPU 102 determines that either the first fan 306 or the second fan 402 has a failure, the process proceeds to step S604.

  In step S604, the CPU 102 displays on the display unit 106 that the fan has failed, and the process proceeds to step S605.

  In step S605, the CPU 102 moves the partition plate of the opening by the opening opening / closing means to open the opening, and the process proceeds to step S606.

  In step S <b> 606, the CPU 102 determines whether there is a power-off command using the power button 200. If the CPU 102 determines that there is no power-off command from the power button 200, the process returns to step S604. When the CPU 102 determines that the power button 200 is instructed to turn off the power, the process proceeds to step S607.

  As described above, according to the embodiment of the present invention, even when one of the fans is stopped due to a failure, the first heat radiation unit 307 and the second heat radiation unit 403 can be cooled, and the fan has failed. By preventing the temperature of the substrate from rising due to the above, it is possible to continue shooting without stopping shooting.

100 imaging device body, 101 imaging unit, 102 CPU, 103 ROM, 104 RAM,
105 Temperature detection unit, 106 Display unit, 107 Recording unit, 108 Operation unit, 109 Blower unit,
110 voice input unit, 111 battery, 200 power button, 201 shutter button,
202 touch panel, 203 air inlet, 204 air outlet, 300 photographic lens, 301 image sensor,
302 Image sensor temperature detector, 303 substrate, 304 substrate temperature detector, 305 first duct,
306 first fan, 307 first heat radiation part, 308 first heat conducting member, 401 second duct,
402 second fan, 403 second heat radiation part, 404 second heat conducting member,
501 Shared duct outer wall, 502 Openable / closable opening, X Image pickup device side direction,
Y imaging optical axis direction, Z imaging device vertical direction, W direction of air passing through the duct

Claims (3)

An air intake port for taking in air from the outside of the main body, and an exhaust port for discharging air to the outside of the main body, a duct part serving as a ventilation path from the air intake port to the exhaust port, and for flowing air into the duct A first cooling part configured with a blowing means, a heat radiating part for transferring heat to air in the duct part, and a second cooling part having a duct outer wall shared with the first cooling part, In the imaging apparatus including a heat source unit that is thermally connected to the first cooling unit and the second cooling unit, the air blowing is performed on the duct outer wall shared by the first cooling unit and the second cooling unit. An image pickup apparatus comprising an opening that can be opened and closed between the means and the heat radiating part. There is provided a failure detection means for detecting a failure of the blower means and a display unit for transmitting a state to a user. When the failure detection means detects that the blower means has failed, The imaging apparatus according to claim 1, further comprising a failure display control unit that performs display for notifying the failure of the unit. An opening / closing means for opening / closing the opening is provided, and the opening / closing control for opening the opening by the opening / closing means when the failure detecting means detects that the blowing means has failed. The imaging apparatus according to claim 2, further comprising: means.