JP2015004828A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging apparatus capable of efficiently releasing heat when imaging over a long time by using a stand built in the imaging apparatus.SOLUTION: The imaging apparatus includes: a stand attached to a main body in an opening/closing manner; a tripod attaching member formed of materials high in thermal conductivity; a concave stand storage part; and a circuit board mounted with an electrical element which is a heat generation source. The tripod attaching member is brought into contact with the circuit board and fixed to the concave stand storage part. Heat is released from the concave stand storage part in a state in which the stand is opened.

Description

  The present invention relates to heat dissipation of an imaging apparatus having a stand.

  In recent years, with an increase in the number of pixels in an imaging apparatus such as a digital camera, it has been required to increase the speed of a signal processing IC. As the speed increases, the power consumption of the signal processing IC increases, and there is a problem that the inside becomes high during continuous shooting or long-time shooting of moving images.

  In the case of shooting a movie for a long time, conventionally, a camera was attached to a tripod and fixed to shoot. Therefore, when a tripod is attached to a tripod attachment member of a camera, a technique for dissipating heat generated by an electric element mounted on a circuit board to the tripod through the tripod attachment member has been proposed (Patent Document 1). Moreover, in this prior example, in the state which has not attached the tripod to the tripod attachment member, it is proposed to radiate heat directly from the tripod attachment member to the outside air.

JP 2001-125191 A

  However, the method of directly radiating heat from the tripod attachment member to the outside air has a problem that the effect is thin and the inside becomes high temperature compared to the heat radiation attached to the tripod.

  When taking a moving image for a long time without using a tripod, it is conceivable to use a built-in stand. However, there is the above-mentioned problem, and the inside is still hot.

  Accordingly, an object of the present invention is to provide an imaging apparatus that can realize efficient heat dissipation when shooting for a long time using a built-in stand without attaching a tripod.

  In order to achieve the above object, an imaging apparatus of the present invention includes at least a storage position, a stand that is movably attached to two positions of use, and a tripod attachment member formed of a material having high thermal conductivity. The tripod mounting member is in contact with the circuit board and fastened to the concave stand storage part. It is characterized by that.

  According to the present invention, it is possible to efficiently dissipate heat even when a stand built in a camera is used and used for a long time.

1 is an external perspective view of a video camera according to a first embodiment. It is an external appearance perspective view of the state which opened the display unit of the video camera of 1st Embodiment. It is a block diagram explaining the structure of the video camera of 1st Embodiment. It is an external appearance perspective view of the imaging | photography form at the time of the long time imaging | photography of the video camera of 1st Embodiment. It is a disassembled perspective view of the video camera of 1st Embodiment. It is a perspective view of the circuit board of the video camera of a 1st embodiment. It is sectional drawing of the video camera of 1st Embodiment. It is a figure of the bottom cover of the video camera of 1st Embodiment. It is a disassembled perspective view of the video camera of 2nd Embodiment.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

<First Embodiment>
FIG. 1 is an external perspective view of a video camera 1 that is an imaging apparatus according to an embodiment of the present invention. FIG. 1A is an external perspective view of the video camera 1 viewed from the top surface side, and FIG. 1B is an external perspective view of the video camera 1 viewed from the bottom surface side. FIG.1 (c) is the external appearance perspective view which looked at the video camera 1 of the stand open state from the bottom face side.

  The video camera 1 is provided with a lens unit 11 for forming a subject image. An imaging element such as a CCD or CMOS sensor for converting a subject image into an electronic signal is provided behind the lens unit 11. Inside the main body of the video camera 1, a circuit board on which an electrical element for processing an electronic signal output from the imaging element is mounted is installed.

  A lens unit 11 is provided on the front side of the video camera 1, a microphone 12 is provided on the left and right sides of the lens unit 11, and a display unit 13 having a biaxial hinge on the upper surface side when viewed from the front side of the video camera 1 is provided. Since the display unit 13 is provided with a liquid crystal display panel 13a and a transparent touch panel is provided on the front surface of the liquid crystal display panel 13a, various operations can be performed.

  A U-shaped stand 14 built in the bottom side as viewed from the front side of the video camera 1 is provided. A stand hinge 14a, which is a connecting portion between the stand 14 and the video camera 1 main body, is installed on the rear side on the bottom side. Opening the stand 14 exposes the recessed stand storage portion 14b.

  A tripod attachment member 15 is installed on the bottom side of the video camera 1 and a screw hole for attaching to the tripod is exposed to the outside.

  In addition, a battery lid unit 16 is provided on the rear side of the video camera 1, and a battery is provided on the inside thereof.

  A power switch 18 is provided on the left side when viewed from the front side of the video camera 1, and the power is turned on and off by sliding operation. A release button 19 is provided on the right side when viewed from the front side of the video camera 1. Still image data shot by pressing the release button 19 is stored in an external recording medium. Video REC is started and ended by touch panel operation of the liquid crystal display panel 13a installed on the upper surface side of the video camera 1. The moving image data recorded by the video REC start and end operations is also stored in the external recording medium in the same manner as the still image data. Still image data and moving image data stored in the external recording medium are reproduced by a touch panel operation of the liquid crystal display panel 13a and displayed on the liquid crystal display panel 13a. In the present embodiment, a recording medium such as a memory card is used as the external recording medium, and the slot of the external recording medium is disposed inside the right slot cover 20 as viewed from the front side of the video camera 1.

  FIG. 2 is an external perspective view of the display unit 13 of the video camera 1 in the opened state. 2A is an external perspective view of the display unit 13 in an opened state when the video camera 1 is viewed from the rear side and FIG. FIG. 2C is an external perspective view of the video camera 1 as viewed from the front side when the display unit 13 of the video camera 1 is opened and the display unit 13 is rotated forward.

  The video camera 1 includes a biaxial hinge 13b behind the video camera 1. By rotating the shaft on the main body side of the biaxial hinge 13b, the liquid crystal display panel 13a can be easily seen at the time of photographing (FIGS. 2A and 2B). In addition, by rotating the axis of the biaxial hinge 13b on the main body side and then rotating the axis of the biaxial hinge 13b on the display unit 13 side, the liquid crystal display panel 13a is directed to the front of the video camera 1, so that It has a structure that can be easily taken (FIG. 2C).

  Next, the electrical operation of the video camera 1 will be described.

  FIG. 3 is a block diagram showing an electrical configuration of the video camera 1.

  The subject image formed through the lens unit 11 is converted into an electronic signal by the image sensor 21 and then processed by the image processing unit 22. The electronic signal processed by the image processing unit 22 is sent to the work memory unit 23, and is recorded on the external recording medium 24 when recording a still image or moving image data.

  The signal processed by the image processing unit 22 and sent to the work memory unit 23 is displayed on the liquid crystal display panel 13a as a through image. Here, the control IC 26 is obtained by integrating the image processing unit 22, the control unit 25, and the work memory unit 23.

  Regarding the storage of the still image, a signal sent from the image sensor 21 and triggered by a signal sent from the release button 19 to the control unit 25 and input to the image processing unit 22 is externally connected via the work memory unit 23. It is recorded on the recording medium 24 as a still image.

  With respect to recording of moving images, a video REC start signal is sent from the touch panel unit 27 to the control unit 25 by touch panel operation, and recording of moving image data on the external recording medium 24 is started. Regarding the end of the video REC, a signal is sent from the touch panel unit 27 by the touch panel operation, and the recording of the moving image data on the external recording medium 24 is ended by the signal of the video REC end. The power supply control is performed by the power supply IC 28 and the battery power supply unit 29 and the AC power supply unit 30 are operated.

  In addition, electrical elements such as the control IC 26 and the power supply IC 28 are mounted on the circuit board 31.

  FIG. 4 is an external perspective view showing a shooting mode when the video camera 1 is shooting for a long time. FIG. 4A is an external perspective view during shooting with a tripod attached to the video camera 1, and FIG. 4B is an external perspective view during shooting using the stand 14 built in the video camera 1. FIG.

  When shooting with a normal video camera for a long time, the video camera is often mounted on a tripod and fixed with the video camera pointing in an arbitrary direction. The video camera 1 also has a tripod attachment member 15, and photography with a tripod attached to the tripod attachment member 15 is possible.

  The video camera 1 can also shoot for a long time using a stand 14 built in the main body. In FIG. 4B, by opening the stand 14 attached to the video camera 1, the angle can be changed and fixed in the tilt direction, and the image can be taken for a long time.

  The stand 14 is installed on the bottom surface side when viewed from the front side of the video camera 1, and includes a stand hinge 14a on the rear side of the bottom surface side. The stand 14 is housed in a recessed stand housing portion 14b in a closed state that is a housed state, and has a shape that does not interfere with the tripod when the tripod is attached. In the maximum open state of the stand 14, it is configured to open up to about 90 degrees compared to the closed state. The stand 14 can be opened and fixed at an arbitrary angle between a closed state and a maximum open state.

  Next, the internal configuration of the video camera 1 will be described.

  FIG. 5 is an exploded perspective view of the video camera 1. 6 is a perspective view of the circuit board 31 and the lens unit 11. FIG. 6A is a perspective view seen from the top surface side, and FIG. 6B is a perspective view seen from the bottom surface side. FIG. 6C is a perspective view of the circuit board 31 assembled with the substrate holding member 35 and the tripod mounting member 15 as viewed from the upper surface side. FIG. 6D is a perspective view of the circuit board 31 assembled with the substrate holding member 35 and the tripod mounting member 15 and viewed from the bottom surface side.

  7 is a cross-sectional view showing the internal configuration of the video camera 1, and FIG. 7 (a) is a view showing the cross-sectional positions of FIG. 7 (b) and FIG. 7 (c). It is a figure. FIG. 7B is a cross-sectional view showing a cross section B of FIG. FIG. 7C is a cross-sectional view showing a cross section C of FIG. In FIG. 7, for the sake of convenience, the stand 14 and the display unit 13 are removed. 8 is a view of the bottom cover, FIG. 8 (a) is a view from the inside, and FIG. 8 (b) is a view from the outside.

  The bottom surface side of the video camera 1 is covered with a bottom cover 32, and the bottom cover 32 is formed of a resin material. The bottom cover 32 is provided with a concave stand accommodating portion 14b, and is secured with a stand accommodating portion retaining screw 33 in order to fix the concave stand accommodating portion 14b and the tripod attachment member 15.

  In the open state of the stand 14, the bottom surface of the recessed stand storage portion 14 b that is a heat dissipation portion and the stand storage portion retaining screw 33 are exposed to perform heat dissipation.

  In addition, a heat radiating hole 34 communicating with the tripod attachment member 15 is arranged in the concave stand storage portion 14b. When the stand 14 is open, the heat radiating holes 34 are exposed and contribute to heat radiation.

  Further, a sheet having a high thermal conductivity such as a graphite sheet may be disposed inside the concave stand storage portion 14b, and heat can be radiated more efficiently.

  The tripod attachment member 15 is fixed by a substrate holding member 35 and a substrate holding member fastening screw so as to contact the circuit board 31. In the video camera 1, the tripod attachment member 15 is formed of a metal material having high thermal conductivity such as zinc die cast.

  A control IC 26 and a power supply IC 28 are mounted near the back side of the position where the tripod mounting member 15 is disposed on the circuit board 31. The control IC 26 and the power supply IC 28 are main heat sources of the circuit board 31 and are configured such that heat is easily transmitted to the tripod mounting member 15 disposed in the vicinity.

  Further, the tripod attachment member 15 is in a position close to the image sensor 21 and has a positional relationship in which the heat of the image sensor 21 is easy to transfer.

  With the above configuration, when a tripod is attached, the heat of the tripod attachment member 15 is radiated to the outside through the tripod. Further, when the stand 14 is in the open state, the heat of the tripod attachment member 15 can be radiated to the outside through the bottom surface of the concave stand storage portion 14b. In the closed state, which is the storage state of the stand 14, the bottom surface of the recessed stand storage portion 14 b and the heat dissipation hole 34 are not touched. Further, even when the stand 14 is in an open state, the bottom surface of the concave-shaped stand storage portion 14b and the heat radiation hole 34 that are high in temperature are difficult to touch.

  With the above configuration, when the stand 14 of the video camera 1 is opened, the interior of the video camera 1 becomes hot due to heat radiation from the bottom surface of the concave stand housing portion 14b and the heat radiation hole 34 even during long-time shooting. It prevents that.

<Second Embodiment>
The same reference numerals are used for the same parts as those of the video camera 1 of the first embodiment. FIG. 9 is an exploded perspective view of a video camera 100 which is an imaging apparatus according to the second embodiment of the present invention.

  In the second embodiment, the shape of the bottom cover 32 is different from that of the video camera 1 according to the first embodiment. In the video camera 100 according to the second embodiment, the bottom cover 32 and the concave heat radiating member 51 are separate members.

  The bottom surface side of the video camera 100 is covered with a bottom cover 32, and the bottom cover 32 is formed of a resin material. The bottom cover 32 is fixed by a tripod attachment member 15 and a bottom cover fastening screw 52. The concave heat radiating member 51 is fastened by a tripod mounting member 15 and a stand housing portion retaining screw 33. In the video camera 100, the concave heat dissipation member 51 is made of a metal material having high thermal conductivity such as zinc die cast. A sheet having a high thermal conductivity such as a graphite sheet may be disposed on the back side of the concave heat radiating member 51, and heat can be radiated more efficiently.

  In the open state of the stand 14, the bottom surface of the concave heat radiating member 51, which is a heat radiating portion, and the stand storage portion fixing screw 33 that fixes the concave heat radiating member 51 are exposed to radiate heat.

  Further, between the bottom cover 32 and the concave heat radiating member 51, a heat radiating hole 34 communicating with the tripod mounting member 15 is disposed. When the stand 14 is opened, the heat radiating holes 34 are exposed and contribute to heat radiation. The tripod attachment member 15 is fixed by a substrate holding member 35 and a substrate holding member fastening screw so as to contact the circuit board 31. In the video camera 100, the tripod attachment member 15 is formed of a metal material having high thermal conductivity such as zinc die cast.

  A control IC 26 and a power supply IC 28 are mounted in the vicinity of the rear side of the position where the tripod mounting member 15 is disposed on the circuit board 31. The control IC 26 and the power supply IC 28 are main heat sources of the circuit board 31 and are configured such that heat is easily transmitted to the tripod mounting member 15 disposed in the vicinity. Further, the tripod attachment member 15 is in a position close to the image sensor 21 and has a positional relationship in which the heat of the image sensor 21 is easy to transfer.

  With the above configuration, when a tripod is attached, the heat of the tripod attachment member 15 is radiated to the outside through the tripod. Further, when the stand 14 is opened, the heat of the tripod mounting member 15 can be radiated to the outside through the bottom surface of the concave heat radiating member 51 that is a heat radiating portion. Further, when the stand 14 is housed, the bottom surface of the concave heat radiating member 51 and the heat radiating hole 34 are not touched. Further, even when the stand 14 is opened, the bottom surface of the recessed heat radiating member 51 and the heat radiating hole 34 are not easily touched.

  With the above configuration, when the stand 14 of the video camera 100 is opened, the inside of the video camera 100 is heated due to heat radiation from the bottom surface of the concave heat radiation member 51 and the heat radiation hole 34 even during long-time shooting. It is preventing.

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

11 Lens portion 14 Stand 14b Recessed stand storage portion 15 Tripod mounting member 26 Control IC
28 Power IC
31 Circuit board 33 Stand housing part retaining screw 34 Heat radiation hole 51 Concave heat radiation member

Claims (3)

A stand attached to the main body so as to be movable at least in two storage positions; a use position; and
A circuit board on which a tripod mounting member made of a material having high thermal conductivity and an electrical element as a heat source are mounted;
Having a recessed stand storage,
The tripod mounting member is connected to the circuit board;
The tripod attachment member is fastened by a fastening member and a bottom surface of the concave stand storage portion,
In the storage position of the stand, the stand covers the bottom surface of the concave stand storage part,
An imaging apparatus characterized in that, at the use position of the stand, a bottom surface of the concave stand storage portion is exposed. The imaging apparatus according to claim 1, wherein the concave-shaped stand accommodating portion has a heat radiating hole communicating with the tripod mounting member. The concave-shaped stand storage portion and the bottom portion of the concave-shaped stand storage portion are separate members,
The imaging apparatus according to claim 1, wherein a bottom surface portion of the stand-shaped stand storage portion is made of a member having higher thermal conductivity than the concave-shaped stand storage portion.