Imaging apparatus

Abstract

To provide a lens interchangeable imaging apparatus that can effectively radiate heat from an image pick-up device, while preventing an increase in size in an optical axis direction.SOLUTION: In an imaging apparatus of the present invention, an air circulation duct 31 not communicating with the inside of a housing is provided between a lens mount part 10 and an image pick-up device 50 in an optical axis direction, and a metal plate 60 is arranged on a surface opposite to the image pick-up device 50.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention particularly relates to a heat dissipation structure for an imaging device. [Background technology]

[0002] In recent years, advances in semiconductor technology have dramatically improved the performance of imaging devices. Improved processor and image sensor performance has made it possible to achieve a larger number of pixels and faster readout speeds.

[0003] One of the issues facing semiconductor devices in this current situation is heat generation. To prevent heat-related breakdowns and ensure the safety of users who come into contact with electronic devices while still achieving high performance, the key technological challenge is to find a way to dissipate and dissipate heat.

[0004] Patent Document 1 discloses an imaging device in which an airflow passage for heat dissipation that does not communicate with the interior is provided between the imaging element and a circuit board that serves as a heat source, and the portion located on the imaging element side is made of a material with lower thermal conductivity than the portion located on the circuit board side.

[0005] According to this invention, it is possible to improve the heat dissipation efficiency while suppressing the heat transferred to the gripped outer casing and the thermal influence of the circuit board on the imaging element.

[0006] In Patent Document 2, a first housing unit having an opening on the rear side is thermally connected to an electronic element while covering the opening.

[0007] The image pickup device is also disclosed as having a second housing unit with a heat dissipation section facing the electronic elements, the heat dissipation section not communicating with the interior and allowing outside air to flow in.

[0008] It is said to have high heat dissipation properties while minimizing the impact on appearance quality. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 4264583 [Patent Document 2] Patent No. 7055369 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in both of the conventional configurations disclosed in Patent Documents 1 and 2, the heat dissipation airflow passage is provided in a manner that overlaps the circuit board, which increases the thickness of the imaging device.

[0011] Furthermore, since the housing is divided, there are concerns that assembly may become difficult and the internal wiring may become complicated.

[0012] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an interchangeable lens imaging device that is capable of effectively dissipating heat from the imaging element while preventing an increase in size in the optical axis direction. [Means for solving the problem]

[0013] In order to achieve the above object, an imaging device of the present invention is an imaging device comprising: an imaging element; a lens mount portion in which a photographing lens can be replaced; a housing having an opening which becomes an optical path during photographing; a metal plate formed on the image plane side of the housing; and an air circulation duct formed by the housing and the metal plate, which has intake and exhaust holes and does not communicate with the inside of the housing; The air flow duct is provided between the lens mount and the imaging element in the optical axis direction, and the metal plate is disposed on the surface facing the imaging element. [Effects of the Invention]

[0014] According to the present invention, it is possible to provide an interchangeable lens imaging device that is capable of effectively dissipating heat from the imaging element while suppressing an increase in size in the optical axis direction. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of an external appearance of an imaging device according to a first embodiment of the present invention; [Figure 2] FIG. 1 is a block diagram showing an electrical configuration of an imaging device according to a first embodiment. [Figure 3] FIG. 1 is an exploded perspective view of an imaging device according to a first embodiment of the present invention; [Figure 4] 1 is a detailed view of an air flow pipe of an imaging device according to the first embodiment. [Figure 5] 1 is a cross-sectional view of an imaging device according to a first embodiment of the present invention; [Figure 6] FIG. 10 is a detailed view of an air flow duct of an imaging device according to a second embodiment. [Figure 7] Schematic diagram of an imaging device according to a third embodiment DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In each embodiment, common elements are designated by the same reference numerals.

[0017] The embodiment described below is an example for realizing the present invention, and should be appropriately modified or changed depending on the configuration of the device to which the present invention is applied and various conditions, and the present invention is not limited to the embodiment described below.

[0018] Furthermore, parts of the embodiments described below may be combined as appropriate. [Example]

[0019] First, the basic configuration of an image capture device 100 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1(a) is an external perspective view of the image capture device 100 as seen from the front, Fig. 1(b) is an external perspective view of the image capture device 100 as seen from the back, and Fig. 1(c) is an external perspective view of the image capture device 100 with an interchangeable lens 90 attached.

[0020] (Basic configuration of the imaging device 100) The imaging device 100 is an interchangeable lens camera for video distribution, and is intended to be fixed to a tripod or a support for use.

[0021] It does not have a recording medium, but sends the captured data to a PC, where it is distributed and recorded. It also does not have a battery, but is powered by a wired connection.

[0022] The imaging device 100 includes an imaging element 50 and a lens mount 10 for mounting an interchangeable lens 90, and the lens mount 10 includes a lens communication terminal 12 inside for communicating with the interchangeable lens.

[0023] The imaging element 50 is a mounting board on which an imaging element is mounted, and an optical filter and the like are formed on the subject side of the imaging surface of the imaging element mounted on the mounting board.

[0024] The optical axis is parallel to the Z-axis direction, and light passing through the interchangeable lens forms an image on the image sensor 50, allowing photographs and videos to be taken.

[0025] The imaging device 100 has a front exterior 20 and a rear exterior 40 as exterior components, and a lens unlock button 11 is provided on the side.

[0026] By pushing the lens unlock button 11 in the negative direction of the Z axis, the lens mount 10 is released from the lock, allowing the interchangeable lens to be attached or detached.

[0027] A first tripod mount 23 and a second tripod mount 24 are provided on a surface different from that of the lens unlock button 11.

[0028] These tripod mounts can be used to attach common tripods and camera mounting accessories by screwing them in.

[0029] When the first tripod mount 23 is fixed so that it faces downward, it is possible to capture images with the long side of the imaging element 50 horizontal, making it possible to capture images suitable for viewing on a horizontally long bottom surface such as a PC display.

[0030] Furthermore, when the second tripod mount 24 is fixed so that it faces downward, it is possible to capture images with the long side of the image sensor 50 being vertical, making it possible to capture images suitable for viewing on a portrait screen such as a smartphone.

[0031] The tripod mounts on two sides allow for a variety of mounting methods and shooting directions.

[0032] A communication terminal section 41 for communication and power supply is provided on the rear surface.

[0033] The communication terminal section 41 includes a USB terminal 42 and an HDMI terminal 43, and can be connected to a PC, camera switcher, recording device, etc. using various cables, allowing it to be used as a video distribution camera or web camera.

[0034] The USB terminal 42 also serves as a power supply terminal, and supplies power for driving the imaging device 100 by connecting it to an AC adapter or a mobile battery.

[0035] Depending on the specifications of the connected device, a single cable may be used for both communication and power supply. The USB terminal 42 and the HDMI terminal 43 are examples, and any communication terminal, such as an SDI terminal, may be used.

[0036] Furthermore, the imaging device 100 does not have a power switch, and starts outputting video images as soon as power supply starts.

[0037] A first air intake / exhaust hole 21 and a second air intake / exhaust hole 22 are provided on two surfaces on which the first tripod seat 23 and the second tripod seat 24 are not provided, respectively.

[0038] This is an intake / exhaust hole for dissipating heat generated mainly from the image pickup element 50, and will be described in detail later.

[0039] By placing them on two surfaces different from the tripod mount, the risk of the intake and exhaust holes being blocked can be reduced even when the camera is fixed to a tripod (not shown).

[0040] Furthermore, regardless of whether the first tripod mount 23 or the second tripod mount 24 is fixed to the bottom surface, either the first intake / exhaust hole 21 or the second intake / exhaust hole 22 is located on the top surface, making it easy to exhaust rising air currents caused by heat generation.

[0041] (Block diagram) Next, the electrical configuration and operation of the image pickup device 100 according to the embodiment of the present invention will be described with reference to Fig. 2. Fig. 2 is a block diagram showing a schematic diagram of the main electrical configuration of the image pickup device 100.

[0042] An optical lens group 91 is incorporated inside the interchangeable lens 90. Although it is depicted schematically in the drawing, it is actually a lens group made up of a plurality of lenses.

[0043] Focus adjustment is performed by moving a part of the optical lens group 91 forward or backward by an AF drive circuit 93. An electromagnetic diaphragm 92 for adjusting the amount of light is arranged on the optical axis 1000 of the optical lens group 91.

[0044] The aperture diameter of the electromagnetic aperture 92 can be changed by an aperture drive circuit 94 according to the specified aperture value.

[0045] The interchangeable lens 90 and the imaging device 100 are electrically connected via a lens communication terminal 12. Based on communication with the imaging device 100, a lens control circuit 95 controls an AF drive circuit 93 and an aperture drive circuit 94, thereby driving the interchangeable lens 90 with desired settings.

[0046] The main operational control of the imaging device 100 is performed by a system control unit 71 .

[0047] The system control unit 71 is a small central processing unit (MPU) mounted on the control board 70, and each component is electrically connected to it.

[0048] The light beam passing through the interchangeable lens 90 forms an image on the image sensor 50 and is extracted as a digital signal by the A / D converter 52 .

[0049] Thereafter, the image is subjected to processing such as filtering and data compression in the image processing unit 53 and then sent to the system control unit 71 .

[0050] The captured image may be stored in memory 73 by memory control unit 72 depending on the image processing and communication specifications with external devices.

[0051] The image sensor 50 also functions as an AE sensor 54 and a focus detection unit 55 .

[0052] For example, the AE sensor 54 calculates exposure information from the imaging results, and the system control unit 71 that receives this information adjusts the aperture value of the interchangeable lens 90, the ISO sensitivity of the imaging element 50, the shutter speed, etc. to achieve the desired exposure.

[0053] The focus detection unit 55 also has the function of calculating the drive direction and movement amount of the focus lens from the focus shift of the image formed on the image sensor 50, and by feeding this information back to the AF drive circuit 93 of the interchangeable lens 90, it is possible to quickly focus on the subject.

[0054] The communication control unit 75 is connected to the USB terminal 42 and the HDMI terminal 43 and is responsible for communication processing with external devices.

[0055] By connecting it to a PC or tablet device, you can output the captured video and perform video recording and streaming.

[0056] It is also possible to input from an external device to set up shooting for the imaging device 100. The USB terminal 42 is also connected to the power supply control unit 74, and can also be used as a terminal for receiving power from an AC adapter or the like with a USB output.

[0057] The image pickup element 50 is provided with a temperature sensor 76, which sends the temperature to the system control unit 71 to monitor heat generation in the image pickup element 50.

[0058] To prevent breakdowns due to high temperatures, recording stops when a predetermined threshold is reached.

[0059] (Internal configuration of the imaging device 100) Next, the internal configuration of the imaging device 100 according to the embodiment of the present invention will be described with reference to Fig. 3. Fig. 3 is an exploded perspective view of the imaging device 100, showing the state disassembled in the Z-axis direction.

[0060] An inner housing 30 is provided inside the front exterior casing 20.

[0061] The inner housing 30 functions as a main frame, and various components, an imaging element 50, an exterior including a front exterior casing 20, and the like are assembled thereto.

[0062] The inner housing 30 is also provided with a rectangular opening 30 a that avoids the imaging area so as not to block the light beam from the interchangeable lens 90 .

[0063] An air flow duct 31 is provided in the inner housing 30, and will be described in detail later. A heat transfer metal plate 60 is provided on the surface facing the air flow duct 31.

[0064] A rubber seal 61 is sandwiched between the heat transfer metal plate 60 and the air flow duct 31, and the opening of the air flow duct 31 is sealed by the heat transfer metal plate 60 without any gaps.

[0065] That is, the air flow duct 31 is separated from and does not communicate with the internal space of the imaging device 100. This can prevent dust and dirt from entering and adhering to the imaging element 50 and the control board 70.

[0066] The heat transfer metal plate 60 is made of a metal material with high thermal conductivity, such as an aluminum alloy or copper.

[0067] The imaging element 50 is fixed to a holding metal plate 51 and is disposed opposite a heat transfer metal plate 60 .

[0068] Furthermore, by sandwiching a first elastic heat transfer member 62 and a second elastic heat transfer member 63 between the holding metal plate 51 and the heat transfer metal plate 60 , heat generated by the imaging element 50 can be released to the heat transfer metal plate 60 .

[0069] The first elastic heat transfer member 62 and the second elastic heat transfer member 63 are arranged above and below the imaging element 50 in the Y-axis direction, preventing the temperature of the imaging element 50 from dropping locally and causing the temperature distribution to become uneven.

[0070] A control board 70 is disposed on the rear side of the imaging element 50 and is electrically connected to the imaging element 50 and the lens communication terminal 12 via a flexible printed circuit board and a connector.

[0071] The various communication terminals of the communication terminal section 41 are mounted on the control board 70 .

[0072] The control board 70 is responsible for overall control of the operation of the imaging device 100, such as control of the imaging element 50, control of communication with the interchangeable lens 90, and control of communication with external devices.

[0073] The control board 70 is fastened to the inner housing 30 with screws via the heat transfer metal plate 60 , and the heat generated by the control board 70 can be released to the heat transfer metal plate 60 by contacting the four corners with the heat transfer metal plate 60 .

[0074] (Air flow pipe 31) Next, the air flow duct 31 of the imaging device 100 according to the embodiment of the present invention will be described in detail with reference to FIGS.

[0075] Fig. 4 shows the inner housing 30 as seen from the rear side, with the heat transfer metal plate 60, image sensor 50, control board 70, etc. removed and the air flow duct 31 exposed. Fig. 5(a) is a front view of the image pickup device 100, and Fig. 5(b) is a cross-sectional view taken along line AA in Fig. 5(a).

[0076] The first intake / exhaust path 31a is a tunnel-shaped flow path provided in the inner housing 30, and is connected to the first intake / exhaust hole 21 provided above the lens unlock button 11 on the side surface.

[0077] Similarly, the second intake / exhaust path 31b is a tunnel-shaped flow path provided in the inner housing 30, and is connected to the second intake / exhaust hole 22 provided on the top surface.

[0078] The path continuing from the intake / exhaust hole may branch into multiple paths, such as the second intake / exhaust path 31b.

[0079] The air flow duct 31 is arranged to surround the four sides of the opening 30a, and for example, air flowing in from the first intake / exhaust hole 21 can pass through a path as shown by arrow F1 and be discharged to the second intake / exhaust hole 22.

[0080] The hatched portion of the air flow duct 31 shown in FIG. 4 is open on the rear side, and is sealed by being covered with the rubber seal 61 and the heat transfer metal plate 60 as described in FIG.

[0081] That is, as shown in FIG. 5(b), the air flow duct 31 has a portion of its surface formed by a heat transfer metal plate 60.

[0082] With the above configuration, heat generated inside the camera is collected in the heat transfer metal plate 60, and by exposing the heat transfer metal plate 60 to the inner surface of the air flow duct 31, the heat can be efficiently dissipated.

[0083] Furthermore, the air flow duct 31 passes around the opening 30a, and is therefore expected to have the effect of dissipating heat generated by the imaging element 50 evenly.

[0084] Furthermore, conventionally, in an interchangeable lens camera such as the imaging device 100, the optical path length from the lens mount 10 to the imaging element 50 is standardized uniquely, and various interchangeable lenses can be used.

[0085] In cameras that prioritize still image capture, a mechanical shutter mechanism is often installed between the lens mount 10 and the image sensor 50, and the optical path length is set taking this space into consideration.

[0086] However, since a mechanical shutter mechanism is not generally used for video shooting, the need for a shutter mechanism is low for a camera whose main purpose is to shoot videos, such as the imaging device 100 according to this embodiment.

[0087] On the other hand, when shooting moving images, the image sensor 50 is always operating in a recording state, and heat generation from the image sensor 50 in particular becomes a major issue.

[0088] That is, the present invention makes it possible to provide a structure that is effective in dissipating heat from the imaging element 50 while preventing the imaging device 100 from becoming too large by utilizing the space of the shutter mechanism that is unnecessary in video cameras.

[0089] The features of the present embodiment 1 will be described below with reference to the accompanying drawings and reference numerals.

[0090] The first feature will be described with reference to FIG. 4 (also shown in FIGS. 6 and 7).

[0091] The imaging device 100 has an imaging element 50, a lens mount 10 that allows the photographing lens to be replaced, a housing 30 having an opening 30a that serves as an optical path during photographing, and a metal plate 60 formed on the image plane side of the housing 30.

[0092] The imaging device 100 also has an air flow duct 31 formed by the housing 30 and the metal plate 60, which has intake and exhaust holes and does not communicate with the inside of the housing.

[0093] The air flow duct 31 is provided between the lens mount 10 and the imaging element 50 in the optical axis direction, and the metal plate 60 is disposed on the surface facing the imaging element 50.

[0094] Next, the second feature will be explained using FIG.

[0095] The metal plate 60 is characterized by being thermally connected to the imaging element 50 .

[0096] Next, the third feature will be explained using FIG.

[0097] The housing 30 has tripod screw holes 23, 24 that can be fixed to a tripod, and the intake and exhaust holes 21, 22 of the air flow duct 31 are provided on a surface that does not have the tripod screw holes 23, 24.

[0098] Next, the fourth feature will be described with reference to FIG. 4 (also shown in FIGS. 6 and 7).

[0099] The openings 30a and 130a are rectangular, and the air flow ducts 31 and 131 are provided along the four sides of the openings 30a and 130a. [Example]

[0100] In Example 1, an example was described in which an air flow duct 31 is provided in an imaging device 100 for video distribution purposes, running from a first intake / exhaust hole 21 provided on the side to a second intake / exhaust hole 22 provided on the top surface, passing around an opening 30a on the inner housing 30.

[0101] In this embodiment 2, an example in which the arrangement of the intake and exhaust holes is different and the flow path is branched will be described. The basic configuration of the imaging device is similar to that of the embodiment 1, so the same reference numerals will be used and the details will be omitted.

[0102] (Inner housing 130 of imaging device 110) FIG. 6 shows the inner housing 130 of the imaging device 110 according to the second embodiment as viewed from the rear side.

[0103] The imaging device 110 has an external shape that is approximately square with respect to the optical axis center, as in the first embodiment, and the four corners are arc-shaped.

[0104] As in the first embodiment, a first tripod mount 23 is provided on the bottom surface and a second tripod mount 24 on the side surface, allowing for various fixing directions and shooting directions.

[0105] Similarly to the first embodiment, the inner housing 130 has an opening 130a that avoids the imaging range and an air flow duct 131 that passes through the periphery thereof.

[0106] The air flow duct 131 is provided with a first tunnel-shaped intake / exhaust passage 131a connected to the first intake / exhaust hole 121 provided on the front exterior casing 120, and a second tunnel-shaped intake / exhaust passage 131b connected to the second intake / exhaust hole 122.

[0107] In the second embodiment, the first intake and exhaust hole 121 is provided at a location close to a corner of the imaging device 110.

[0108] For example, when air flows in from the first intake / exhaust hole 121, it passes through the first intake / exhaust path 131a and connects to the air flow duct 131 around the opening 130a, as indicated by an arrow F2.

[0109] The air flow duct 131 branches off along each side at the corners of the rectangular opening 130a and joins again at a diagonal corner.

[0110] The air then passes through the second intake / exhaust path 131 b and is exhausted from the second intake / exhaust hole 122 provided diagonally to the first intake / exhaust hole 121 .

[0111] The air flow duct 131 in the second embodiment passes around the opening 130a, and the number of bends in the flow path can be reduced compared to the configuration shown in the first embodiment.

[0112] That is, air can pass through with less resistance, so heat dissipation by more effective convection heat transfer can be expected.

[0113] Furthermore, by providing the first intake and exhaust hole 121 in an arc shape near the corner of the imaging device 110, the first intake and exhaust hole 121 is not completely blocked even when a tripod wider than the bottom surface of the imaging device 110 is attached to the first tripod mount 23.

[0114] Similarly, when fixed to the second tripod mount 24, the second intake and exhaust holes 122 are not blocked.

[0115] In addition, compared to Example 1, by arranging the first intake / exhaust hole 121 and the second intake / exhaust hole 122 near the corners, the side surface S1 and the side surface S2 can be widely utilized, which has the advantage that, for example, it is easy to arrange operating members and display members while avoiding the intake / exhaust holes.

[0116] The features of the second embodiment will be described below with reference to the accompanying drawings and reference numerals.

[0117] Next, the fifth feature will be explained using FIG.

[0118] The imaging device 110 is rectangular when viewed in the optical axis direction, with chamfered or arc-shaped corners, and the intake and exhaust holes 121, 122 of the air flow duct 131 are provided at the corners.

[0119] Next, the sixth feature will be described with reference to FIG. 6 (also shown in FIG. 7).

[0120] The air flow duct 131 is characterized in that it branches into two directions at the corner of the opening 130a. [Example]

[0121] In the first and second embodiments, examples in which the present invention is applied to an imaging device for video distribution have been described. In the third embodiment, an example in which the present invention is applied to an imaging device of a type that is held by a general user to take pictures will be described with reference to a schematic diagram.

[0122] FIG. 7 is a schematic diagram of an imaging device 200 according to the third embodiment, viewed from the front.

[0123] As in the first and second embodiments, the imaging device 200 includes an imaging element 250, a lens mount 210 for mounting an interchangeable lens (not shown), and a tripod seat 223 for mounting a tripod.

[0124] In addition, it is equipped with a shutter button 201 for the user to issue an instruction to start shooting, and a grip portion 202 for the user to grip.

[0125] The air flow duct 231 is an image of an air flow duct drawn superimposed on the imaging device 200.

[0126] In reality, as in Examples 1 and 2, it is provided between the lens mount 210 and the image sensor 250, and some surfaces are formed by a metal plate (not shown) that is thermally connected to the image sensor 250, and it does not communicate with the interior of the image sensor 200.

[0127] The first intake / exhaust hole 221 connected to the air flow duct 231 is provided near the corner of the side surface opposite to the grip portion 202 .

[0128] Regardless of whether a tripod is used or how the user holds the device, the first intake and exhaust hole 221 is not blocked. The second intake and exhaust hole 222 is located on the top surface of the imaging device 200, inside the shutter button 201, and is positioned so that it will not be blocked and the exhaust air will not hit the operating members or the user's hands.

[0129] In the third embodiment, an air-cooling fan accessory 300 is attached to the side of the imaging device 200. The air-cooling fan accessory 300 is provided with an air-cooling fan 310 and an air intake 320, and can actively send air into the first intake / exhaust hole 221 by receiving power from the imaging device 200.

[0130] In particular, in a photography mode in which the image sensor 50 generates a large amount of heat, it is conceivable to utilize the air flow duct 231 in combination with such external accessories.

[0131] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention.

[0132] Therefore, the embodiments included in the present invention will be described below by configuration.

[0133] (Configuration 1) an imaging element 50, a lens mount 10 that allows interchangeable photographing lenses, a housing 30 having an opening 30a that serves as an optical path during photographing, and a metal plate 60 formed on the image plane side of the housing 30; an air flow duct (31) formed by the housing (30) and a metal plate (60), the air flow duct (31) having an intake and exhaust hole and not communicating with the inside of the housing, The imaging device is characterized in that the air flow duct 31 is provided between the lens mount portion 10 and the imaging element 50 in the optical axis direction, and the metal plate 60 is arranged on the opposing surface of the imaging element 50.

[0134] (Configuration 2) The imaging device according to configuration 1, wherein the metal plate 60 is thermally connected to the imaging element 50.

[0135] (Configuration 3) The imaging device according to configuration 1 or 2, characterized in that the housing 30 has tripod screw holes 23, 24 that can be fixed to a tripod, and the intake and exhaust holes 21, 22 of the air flow duct 31 are provided on a side that does not have the tripod screw holes 23, 24.

[0136] (Configuration 4) The imaging device described in any one of configurations 1 to 3, wherein the imaging device 110 is rectangular when viewed from the optical axis direction, has chamfered or arc-shaped corners, and the intake and exhaust holes 121, 122 of the air flow duct 131 are provided at the corners.

[0137] (Configuration 5) The imaging device according to any one of configurations 1 to 4, wherein the openings 30a, 130a are rectangular, and the air flow ducts 31, 131 are provided along the four sides of the openings 30a, 130a.

[0138] (Configuration 6) 6. The imaging device according to any one of configurations 1 to 5, wherein the air flow duct 131 branches into two directions at a corner of the opening 130a. [Explanation of symbols]

[0139] 10 Lens mount 20 Front exterior 21 First intake and exhaust vent 22 Second intake and exhaust vent 23 First tripod mount 24 Second tripod mount 30 Internal housing 30a opening 31 Air distribution pipe 31a First intake and exhaust path 31b Second intake and exhaust path 50 imaging element 60 Heat Transfer Sheet Metal 100 Imaging device

Claims

1. An imaging device having an imaging element, a lens mount unit that allows an interchangeable photographing lens, a housing having an opening that serves as an optical path during photography, a metal plate formed on an image plane side of the housing, and an air circulation duct formed by the housing and the metal plate, having intake and exhaust holes and not communicating with the inside of the housing, an air flow duct provided between the lens mount and the imaging element in the optical axis direction, and the metal plate disposed on the surface facing the imaging element;

2. 2. The imaging device according to claim 1, wherein the metal plate is thermally connected to the imaging element.

3. 2. The imaging device according to claim 1, wherein the housing has a tripod screw hole for fixing to a tripod, and the intake and exhaust holes of the air flow duct are provided on a surface that does not have the tripod screw hole.

4. The imaging device according to claim 1, characterized in that the imaging device is rectangular when viewed from the optical axis direction, the corners are chamfered or arc-shaped, and the intake and exhaust holes of the air flow duct are provided at the corners.

5. 2. The imaging device according to claim 1, wherein the opening is rectangular, and the air flow duct is provided along four sides of the opening.

6. 6. The imaging device according to claim 5, wherein the air flow duct branches into two directions at a corner of the opening.

Images