JP2018077373A - Imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging device in which local temperature rise in a metal member where a tripod shoe is formed and in an exterior part is prevented.SOLUTION: Provided is an imaging device comprising imaging means which is a first heat generation source, a main board which is a second heat generation source, wireless communication means which is a third heat generation source, a first body structure member, an image display device, and a hinge part that supports the image display device so as to be capable of rotationally moving relative to the first body structure member, where the imaging device includes a second body structure member having a tripod shoe screw part made of metal that is arranged at the bottom of the first body structure member, a first heat transfer member connecting the imaging means and the body structure member, a second heat transfer member arranged in front of the main board connected to the imaging means on the central arithmetic processing device, recording medium and power supply controller side of the main board and with the first body structure member on the rear side, a third heat transfer member connecting to the wireless communication means and the hinge part, a fourth heat transfer member connecting the second heat transfer member and the second body structure member.SELECTED DRAWING: Figure 3(a)

Description

  The present invention relates to an imaging apparatus capable of wireless communication, and more particularly to an imaging apparatus having a structure corresponding to heat generation during operation of the imaging apparatus.

  In recent years, image pickup devices are generated from electronic components mounted on circuit boards inside the image pickup device due to the increase in the number of pixels in the image pickup device, the development of multi-functionality such as wireless communication functions with external devices, and the incorporation of video functions. The amount of heat to be increased is increasing, and the temperature of the imaging device tends to increase.

  For this reason, depending on the configuration of the internal parts, there is a problem that the temperature of the exterior part that can be directly touched by the photographer is locally increased. Therefore, for example, in Patent Document 1, heat generated in a plurality of electronic components is transferred to a first main body structural member at least partially made of a metal member and a second main body structural portion made of metal on which a tripod seat is formed. A method of preventing local temperature rise by dispersively transmitting is disclosed.

  When the tripod is attached, strength is required so that the screw thread of the tripod attachment portion is not damaged. Generally, the tripod attachment portion is made of metal. For this reason, the tripod mounting portion has a high heat capacity and is effective as a heat sink.

Japanese Patent Laying-Open No. 2015-204580

  However, in the prior art disclosed in the above-mentioned patent document, a metal with a tripod seat that is a destination of the generated heat is formed by an increase in the amount of heat generated from an electronic component mounted on a circuit board inside the imaging device. The temperature of the manufactured member locally increases.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an imaging apparatus that prevents a metal member on which a tripod seat is formed and an exterior part from locally raising the temperature.

  In order to achieve the above object, the present invention provides an image pickup means (310) as a first heat generation source for converting a subject image into an electric signal, a central processing unit (342) for processing the electric signal, and a recording medium. (341) is a main board (340) which is a second heat source mounted on the grip side, and the image processing means, the central processing unit, the recording medium, and the power supply control unit and diagonal positions A wireless communication means (351) which is a third heat generation source disposed in the first body structure member (330), at least a part of which is made of a metal member, an image display device (501), and the image In the imaging device (101) including a hinge portion (502) that supports the display device (501) so as to be rotatable in the opening / closing direction with respect to the first main body structural member, the imaging device (101) from the back side in the photographic optical axis direction. Main board, said imaging means, front A first heat transfer member (371) arranged in the order of the first main body structural member and the wireless communication means and connected to the imaging means, and a second heat transfer member arranged on the front side of the main board (372), a third heat transfer member (381) connected to the wireless communication means, a fourth heat transfer member (376) connected to the second heat transfer member, and the first heat transfer member (381) A second main body structural member (360) having a metal tripod seat screw portion disposed on the bottom surface of the main body structural member, and the first heat transfer member includes the first main body structural member and the back surface. The second heat transfer member is connected to the first main body structural member on the back side on the central processing unit of the main substrate, the recording medium, and the power supply control unit side with respect to the imaging means. And the third heat transfer member is connected to the imaging means by the wireless communication means. In, which is connected to the hinge portion of the image display device, the fourth heat transfer member is characterized by being connected to the second body structure member.

  ADVANTAGE OF THE INVENTION According to this invention, the imaging device which prevented that the metal member and exterior part in which the tripod base was formed prevented temperature rise locally can be provided.

Schematic sectional view showing the configuration of the camera system according to the present embodiment Exploded perspective view of the camera according to the present embodiment Exploded perspective view showing the configuration of the main unit according to the present embodiment Exploded perspective view showing the configuration of the main unit according to the present embodiment Exploded perspective view showing the configuration of the main unit according to the present embodiment Exploded perspective view showing the configuration of the main unit according to the present embodiment Front perspective view of main part according to the present embodiment Rear perspective view of main body component according to the present embodiment The exploded perspective view which shows the fixing | fixed part of the main body components and image display apparatus which concern on this Embodiment

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[Example 1]
As an example of an embodiment of the invention, a configuration of a digital single lens reflex camera will be described with reference to FIG.

  FIG. 1 is a schematic cross-sectional view showing a configuration of a camera system according to the present embodiment, which includes a camera body 101 (imaging device) and a photographing lens 200 that is detachably attached to the camera body 101. In the photographing lens 200, a photographing optical system 201 and a diaphragm 202 for adjusting the exposure amount are provided. Although the photographing optical system 201 is represented as one lens in FIG. 1, it is actually an optical system composed of a plurality of lens groups. The photographing lens 200 is electrically and mechanically connected to the camera body 101 via a known mount mechanism. By attaching the photographing lens 200 having different focal lengths to the camera body 101, it is possible to obtain photographing screens having various angles of view.

  In the photographing lens 200, the focus lens, which is a part of the photographing optical system 201, is moved in the photographing optical axis direction via a driving mechanism (not shown) to adjust the focus of the photographing optical system 201.

  The camera described in this embodiment is a digital camera using an image sensor 311 such as a CCD or CMOS sensor, and obtains an image signal of a still image or a moving image by driving the image sensor 311 once or continuously. . The moving image and the still image obtained by the image sensor 311 are displayed on the image display device 501 provided on the back surface of the camera body 101, so that the photographer can check the photographing result.

  Reference numeral 301 denotes a movable half mirror that divides one light path into two light paths by reflecting a part of a light beam incident through the photographing optical system 201 and transmitting the remaining light. A movable sub-mirror 302 (total reflection mirror) is provided at the tip of the half mirror 301, and the light beam transmitted through the half mirror 301 is reflected and guided to the focus detection unit 303. The focus detection unit 303 receives the light beam reflected by the sub mirror 302 and performs focus detection by the phase difference detection method.

  The finder unit 320 includes a focusing screen 321, a pentamirror 322, and a finder optical system 323. Of the optical paths divided by the half mirror 301, the light incident on the finder unit 320 forms an image on the focusing screen 321. The direction of the image formed on the focusing screen 321 is changed via the pentamirror 322, and can be confirmed by the photographer via the finder optical system 323 including a plurality of lenses.

  A focal plane shutter 304 that adjusts the amount of light incident on the image sensor 311 is disposed behind the sub mirror 302. An optical low-pass filter 312 is provided behind the focal plane shutter 304. The optical low-pass filter 312 is configured so that components having a predetermined cutoff frequency or higher in the subject image are not transmitted onto the image sensor 311.

  An image sensor 311 is disposed behind the optical low-pass filter 312. An imaging substrate 313 is disposed behind the imaging element 311 and includes an A / D conversion unit for converting an analog image signal from the imaging element 311 into digital image data. An imaging unit (imaging means) 310 is configured by the imaging element 311, the optical low-pass filter 312, and the imaging substrate 313.

  The half mirror 301 and the sub mirror 302 are configured to retract to a position outside the photographing optical path at the time of photographing, and the light flux that has passed through the optical low-pass filter 312 enters the image sensor 311. A main board 340 is disposed behind the imaging unit 310, and the imaging board 313 and the main board 340 are connected by an imaging connection board 314 described later. The main board 340 controls the operation of the entire camera body 101.

  FIG. 2 is an exploded perspective view showing the internal configuration of the camera body 101. In FIG. 2, the camera body 101 includes a body unit 300, a front cover unit 400, a rear cover unit 500, and an upper cover unit 600. The front cover unit 400 is provided with a lens removal button 401, a grip portion 402, and the like.

  The rear cover unit 500 is provided with an image display device 501 and various operation buttons (not shown). The image display device 501 is fixed to the rear cover 503 by a hinge portion 502 so as to be capable of rotating and opening. The hinge part 502 is comprised with the metal member. The upper cover unit 600 is provided with a release button 601 and a built-in flash (not shown).

  3 (a), 3 (b), 3 (c), and 3 (d) are exploded perspective views of the main unit 300, respectively. Reference numeral 305 denotes a mirror box that holds the half mirror 301 and the sub mirror 302. The mount unit 306 holds the photographing lens 200. Above the mirror box 305, a finder unit 320 is attached to the mirror box 305 with screws. The pentamirror 322, which is an optical member constituting the finder unit 320, is a member in which a part or all of the reflecting surface is molded from resin.

  Below the mirror box 305, a focus detection unit 303 is attached to the mirror box 305 with screws. At the rear of the mirror box 305, a focal plane shutter 304 is attached to the mirror box 305 with screws.

  A main body (first main body structural member) 320 is attached to the mirror box 305 by screws behind the focal plane shutter 304. 4A and 4B are a front perspective view and a rear perspective view of the main body 320, respectively. As shown in FIGS. 4A and 4B, the main body 320 is made of a resin in which a metal member having an opening 331 is inserted in a portion that is in the same position as the imaging unit 310 in the imaging optical axis direction. It is a member. The metal member inserted into the main body 320 is formed with a metal exposed portion 332 (shaded portion), and is connected to each metal heat transfer member described later.

  4A and 4B, the metal exposed portion 332 is divided into a plurality of regions, but the metal member has a single component connected inside the resin of the main body 320. A battery box 333 into which a battery is inserted is provided on the grip side of the main body 320, and a bent portion 334 of the metal member is exposed on the non-grip side of the battery box 333.

  An imaging unit 310 including an imaging element 311 is attached to the mirror box 305 with screws, behind the main body 320. The imaging board 313 and the main board 340 of the imaging unit 310 are connected by an imaging connection board 314. The imaging element 311 and the imaging substrate 313 constituting the imaging unit 310 serve as a large heat source (first heat source) when performing processing for converting an analog image signal into digital image data.

  A main board 340 is attached to the main body 330 by screws behind the imaging unit 310. The main board 340 is an L-shaped member in which a portion that is substantially in the same position as the imaging board 313 that is a part of the imaging unit 310 is cut out. On the grip side of the main body 340 of the camera body 101, a recording medium 341 is mounted on the front side, and a CPU (Central Processing Unit) 342 including an image processing unit and a power supply control unit 343 are mounted on the back side.

  The main board 340 generates heat when processing for writing image data to the recording medium 341 or processing for reading image data from the recording medium 341 is performed. Further, the CPU 342 generates heat when performing various image processing. Further, the power supply control unit 343 generates heat when the camera body 101 performs an imaging operation. Therefore, the grip side of the main substrate 340 becomes a large heat generation source (second heat generation source) when performing the various processes described above.

  On the opposite side of the mirror body 305 of the camera body 101 with respect to the camera body 101, specifically, with respect to the imaging unit 310, a wireless module (wireless communication) Means) 351 is arranged. The wireless module 351 is disposed on the lower surface side of the pentamirror 322 that is an optical member constituting the finder unit 320. The wireless module 351 and the main board 340 are connected to each other through a wireless board 352, an interface board 353 having an interface such as a microphone terminal, and a connection board 354 of the interface board and the main board 340.

  The wireless module 351 becomes a large heat source (third heat source) when performing control to wirelessly transmit image data to an external device. Below the mirror box 305, a metal bottom plate (second main body structural member) 360 is attached to the mirror box 305 and the main body with screws. A tripod screw portion 361 is integrally formed with the bottom plate 360 at a substantially central portion of the bottom plate 360.

  FIG. 5 is a diagram illustrating a fixing unit between the main body 330 and the image display device 501. The image display device 501 is attached to the main body 330 by a screw together with a rear cover 503 (not shown) at the first connection portion 502a and the second connection portion 502b of the hinge portion 502.

  Next, each heat transfer member and connection method for diffusing the heat from each heat source described above in the camera body 101 will be described with reference to FIGS. Reference numeral 371 denotes a metal imaging heat transfer member (first heat transfer member) for diffusing heat generated in the imaging unit 310 into the camera body 101. The imaging heat transfer member 371 is connected to the imaging board 310 of the imaging unit 310 on the wireless module 351 side with respect to the imaging unit 310, and is connected to the metal member inserted into the main body 330 on the back side of the main body 330.

  Reference numeral 372 denotes a metal first main board heat transfer member (second heat transfer member) for diffusing heat generated in the recording medium 341, the CPU 342, and the power supply control unit 343 of the main board 340 into the camera body 101. ). The first main board heat transfer member 372 is disposed on the front side of the recording medium 341, the CPU 342, and the power supply control unit 343 of the main board 340, and is attached to the main body 330 together with the main board 340 with screws. The first main board heat transfer member 372 is in contact with the metal member inserted into the main body 330 on the back side of the main body 330. Thereby, the heat generated on the grip side of the main board 340 can be transmitted to the main body 330.

  In addition, the first main board heat transfer member 372 is connected to the third main board arranged on the front side of the battery box 333 via the second main board heat transfer member 373 arranged on the grip side of the battery box 333. The substrate heat transfer member 374 is connected. Further, the first main board heat transfer member 372 is connected to the third main board heat transfer member 374 via the fourth main board heat transfer member 375 disposed on the upper cover unit 600 side of the battery box 333. Has been.

  The third main board transmission member 374 is in contact with the bent portion 334 of the metal member inserted into the main body 330. Thereby, the heat generated on the grip side of the main board 340 can be transmitted to the front side of the battery box 333 via the three paths on the grip side, the upper cover side, and the non-grip side of the battery box 333.

  A fifth main substrate heat transfer member (fourth heat transfer member) 376 is connected to a part of the connection portion between the first main substrate heat transfer member 372 and the metal member inserted into the main body 330. . The fifth main board heat transfer member 376 is connected to the bottom plate 360 on the back side of the camera body 101 with respect to the tripod screw 361 and on the grip side with respect to the imaging unit 310. The thermal conductivity of the fifth main board heat transfer member 376 is smaller than the heat transfer coefficients of the metal member inserted into the main body 330 and the first to fourth main board heat transfer members.

  Thereby, it is suppressed that the temperature of the bottom plate 360 is locally increased by the heat generated on the grip side of the main substrate 340. Reference numeral 381 denotes a metal wireless heat transfer member (third heat transfer member) for diffusing heat generated in the wireless module 351 into the camera body 101. The wireless heat transfer member 381 also has a function of holding the wireless module 351. The third connection portion 381a is connected to the main body, the fourth connection portion 381b is connected to the mirror box 305, and the fifth wireless connection member 355 is connected via the wireless holding member 355. It is attached to the mirror box 305 by the connecting portion 381c.

  The wireless heat transfer member 381 is connected to the intermediate connection member 382 at the third connection portion 381a, and the intermediate connection member 382 is connected to the hinge portion 502 of the image display device 501 at the first connection portion 502a. The wireless heat transfer member 381 is a fourth connection portion 381b that is connected to the bottom plate 360 on the front side of the camera body 101 with respect to the tripod socket screw portion 361 and on the wireless module 351 side with respect to the imaging unit 310. Yes.

  Thereby, the heat generated by the wireless module 351 can be transmitted to the hinge portion 502 and the bottom plate 360 of the image display device 501. The wireless heat transfer member 381 is connected to the first metal member 383 at the third connection portion 381a. The first metal member 383 is connected to the strap attachment bracket 384 and the bottom plate 360. The strap attachment bracket 384 is connected to the metal member inserted into the main body 330 by the second metal member 385. Thereby, the wireless module 351 is thermally and electrically connected to the bottom plate 360 and the metal member inserted into the main body 330.

  Here, the thermal conductivity of the first metal member 383 is smaller than the thermal conductivity of the wireless heat transfer member 381 and the intermediate connection member 382. Thereby, it is suppressed that the strap attachment metal 384 and the bottom plate 360 rise in temperature locally.

  With the above-described configuration of the present invention, heat generated in the imaging unit 310, the main board 340, and the wireless module 351 is converted into a metal member inserted into the main body 330, a heat transfer member disposed in the battery box 333, a bottom plate 360, a hinge. It can be distributed and transmitted to each part of the unit 502. Thereby, it is possible to prevent the temperature inside the camera body 101 from rising locally. That is, it is possible to provide an imaging apparatus in which the temperature of the bottom plate 360 and the exterior member does not increase locally.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

101 Camera body (imaging device)
310 Imaging unit (imaging means)
330 Main body (first main body structural member)
340 Main board 341 Recording medium 342 CPU (central processing unit)
343 Power control unit 351 Wireless module (wireless communication means)
360 Bottom plate (second body structural member)
361 Tripod screw 371 Imaging heat transfer member (first heat transfer member)
372 First main substrate heat transfer member (second heat transfer member)
376 Fifth main substrate heat transfer member (fourth heat transfer member)
381 Wireless heat transfer member (third heat transfer member)
383 First metal member 384 Strap mounting bracket 502 Hinge portion 501 Image display device

Claims (3)

Imaging means (310) which is a first heat generation source for converting a subject image into an electrical signal;
A central processing unit (342) for processing the electrical signal and a main substrate (340) as a second heat generation source on which the recording medium (341) is mounted on the grip side;
A wireless communication means (351) that is a third heat generation source disposed diagonally to the central processing unit, the recording medium, and the power supply control unit with respect to the imaging means;
A first body structural member (330) at least partially composed of a metal member;
An image display device (501);
In the imaging device (101), comprising: a hinge portion (502) that supports the image display device (501) so as to be rotatable in an opening / closing direction with respect to the first main body structural member.
Arranged in order of the main substrate, the imaging means, the first main body structural member, the wireless communication means from the back side in the photographing optical axis direction,
A first heat transfer member (371) connected to the imaging means;
A second heat transfer member (372) disposed on the front side of the main substrate;
A third heat transfer member (381) connected to the wireless communication means;
A fourth heat transfer member (376) connected to the second heat transfer member;
A second main body structural member (360) having a metal tripod seat screw portion disposed on the bottom surface of the first main body structural member;
The first heat transfer member is connected to the first body structural member on the back side,
The second heat transfer member is connected to the first main body structural member on the back side on the central processing unit of the main substrate, the recording medium, and the power supply control unit side with respect to the imaging unit,
The third heat transfer member is connected to a hinge portion of the image display device on the wireless communication means side with respect to the imaging means,
The image pickup apparatus, wherein the fourth heat transfer member is connected to the second main body structural member. The imaging device further includes a first metal member (383) connected to the third heat transfer member;
A strap mounting bracket (384),
The first metal member is connected to the second body constituting member and the strap mounting bracket,
The imaging apparatus according to claim 1, wherein the thermal conductivity of the first metal member is smaller than that of the third heat transfer member and the second main body constituting member. The main board has a power supply controller (343) mounted on the grip side,
The imaging apparatus according to claim 1, wherein the first heat transfer member is connected to the first main body structural member on the wireless communication unit side with respect to the imaging unit.