JP2007166006A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an imaging apparatus advantageous for reducing the cost, stabilizing the operation of an imaging element, and preventing unwanted radiation. <P>SOLUTION: A holder 82 is formed of a material excellent in thermal conductivity, and a portion of the holder 82 facing the rear surface 1804 of an image sensor 18 is a heat transmission part 82A touching the rear surface 1804 of the image sensor 18. A heat transmission member 84 is disposed on the rear surface of the heat transmission part 82A located oppositely to the surface of the heat transmission part 82A touching the rear surface 1804 of the image sensor 18. The heat transmission member 84 is formed of a material excellent in thermal conductivity and exhibiting insulation properties and elasticity. A pushing plate 86 pushes the heat transmission member 84 against the rear surface of the heat transmission part 82A. The pushing plate 86 is formed of a material excellent in thermal conductivity and exhibiting conductivity and elasticity, and clamped fixedly by a portion 1702 of a stay 17 and a heat dissipation plate 90 while being held by an elastic material 87. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an imaging apparatus.

An imaging device such as a video camera has a case that constitutes an exterior, and inside the case, an imaging optical system, an imaging element that captures a subject image guided by the imaging optical system, and an operation for operating the imaging element A substrate on which a circuit is arranged is provided.
Since the image sensor generates heat during its operation, it is necessary to dissipate the heat to prevent the temperature of the image sensor from rising and stabilize the operation of the image sensor.
For this reason, conventionally, there has been provided an image pickup apparatus provided with a heat radiating plate inside a case and provided with a heat transfer mechanism that transfers heat of the image sensor to the heat radiating plate (see Patent Document 1).
JP 2001-313852 A

However, since the above-described imaging apparatus uses a heat pipe as a heat transfer mechanism, the configuration is complicated and disadvantageous in reducing the cost.
In addition, since the imaging device handles signals including high-frequency components, electromagnetic waves (unnecessary radiation) are likely to be generated. Therefore, when electromagnetic waves generated from the imaging device and the substrate are transmitted to a heat transfer mechanism or a heat radiating plate, There is a disadvantage that the heat radiation plate acts as an antenna and electromagnetic waves are easily radiated to the outside of the case.
The present invention has been made in view of such circumstances, and an object thereof is to efficiently dissipate heat generated from the image pickup device while reducing costs and to stabilize the operation of the image pickup device and to eliminate the need for electromagnetic waves. An object of the present invention is to provide an imaging apparatus that is advantageous in preventing radiation.

  In order to achieve the above-described object, the present invention provides a case that constitutes an exterior and a photographic optical system, is provided in such a manner that it extends forward and backward in the case, and its front part faces the front surface of the case. A tube, an imaging element disposed at the rear end of the lens barrel and having an imaging surface facing the imaging optical system, a substrate provided with an imaging circuit that supports the imaging element and operates the imaging element, and the case An image pickup apparatus comprising: a heat radiating plate provided so as to extend along an inner surface of the image pickup device; and a heat transfer mechanism that transfers heat of the image pickup element to the heat radiating plate, wherein the heat transfer mechanism is thermally conductive. A holder formed of a material excellent in being attached to the lens barrel and disposed at a position spaced in front of the substrate; and a position opposite to the imaging surface at a position spaced forward of the substrate at the portion of the holder That contacts the back surface of the imaging device. A heat transfer member that faces the back surface of the heat transfer point that is located opposite to the surface of the heat transfer point that is formed from a location and a material having excellent thermal conductivity and insulation and elasticity; A pressing plate that is formed of a material having excellent thermal conductivity and conductivity and elasticity, is attached to the heat radiating plate, is spaced apart from the substrate, and presses the heat transfer member against the back surface of the heat transfer location; It is characterized by.

Therefore, according to the present invention, the heat generated by the image sensor is transmitted to the heat radiating plate through the heat transfer location of the holder, the heat transfer member, and the pressing plate, so that the heat of the image sensor can be efficiently radiated. This is advantageous in stabilizing the operation of the image sensor.
In addition, since the heat transfer mechanism is composed of simple members such as a holder, a heat transfer member, and a pressing plate, the structure is simpler than that using a conventional heat pipe, so that the size and cost can be reduced. It will be advantageous.
In addition, since the pressing plate is electrically insulated from the image pickup element by the heat transfer member 4, it is possible to suppress unnecessary radiation generated from the image pickup element from being transmitted to the pressing plate and to prevent generation of unnecessary radiation due to electromagnetic waves. This is advantageous.

(First embodiment)
Next, embodiments of the present invention will be described with reference to the drawings.
1, 2, and 3 are perspective views illustrating a configuration of the imaging apparatus 10 according to the first embodiment, and FIG. 4 is a block diagram illustrating a configuration of a control system of the imaging apparatus 10.

As shown in FIGS. 1, 2, and 3, the imaging device 10 of the present embodiment is a video camera.
The imaging device 10 includes a case 12 that constitutes an exterior and has a length in the front-rear direction and a height in the vertical direction that are larger than the width in the left-right direction. In the present specification, left and right refer to the state in which the imaging device 10 is viewed from the rear, the subject side is referred to as the front in the optical axis direction of the optical system, and the imaging element side is referred to as the rear.
At the upper front part of the case 12, a lens barrel 16 incorporating the photographing optical system 14 extends in the front-rear direction, and the front part faces the front surface of the case 12. The photographing optical system 14 has a zoom lens and is configured so that the zoom rate can be continuously varied.
An imaging element 18 (see FIG. 4) is provided at the rear end of the lens barrel 16 to capture a subject image guided by the photographing optical system 14.
As shown in FIG. 2, a view finder (electronic finder) 20 for visually recognizing a subject image picked up by the image sensor 18 is provided at the rear of the upper portion of the case 12 so as to face the rear from the rear surface. The viewfinder 20 has a display panel 22 made of, for example, a liquid crystal display device provided in the case 12 and is configured to visually recognize an image displayed on the display panel 22.
On the left side of the case 12, a display panel 24 made of, for example, a liquid crystal display device for displaying a subject image captured by the image sensor 18 is provided so as to be openable and closable. The display panel 24 is accommodated when the display panel 24 is closed. It is accommodated in the recess 1202. A speaker 52 is provided on the bottom wall of the housing recess 1202.
The right side of the case 12 is provided with a storage portion 26 in which a disc-shaped recording medium 2 (see FIG. 4) for recording image data and audio data is detachably stored. The storage portion 26 is opened and closed by an opening / closing lid 2604. Is done.
As shown in FIG. 3, a grip belt 28 extending in the front-rear direction is provided on the right side surface of the case 12.
The grip belt 28 has a belt main body 2802 having both ends connected to the front and rear portions of the case 12, and an upper pad 2804 that covers an intermediate portion of the belt main body 2802.
In addition, a microphone 46 for collecting sound is provided on the front surface of the case 12.
As shown in FIGS. 1, 2, and 3, the imaging device 10 includes a power supply operation member 32, a still image shooting operation member 34, and a zoom operation as operation members for executing various functions relating to shooting. A member 36, a mode switching operation member 38, a moving image shooting operation member 40, and the like are provided.

As shown in FIG. 4, the imaging apparatus 10 includes a video signal amplification circuit 42, an image data processing unit 44, a microphone 46, a microphone amplification circuit 48, an audio data processing circuit 50, a speaker 52, an output amplification circuit 54, A recording / reproducing circuit 56, a control circuit 58, a recording / reproducing mechanism 60, a drive circuit 62, an interface circuit 64, a memory card slot 66, a zoom drive unit 68, and the like are provided.
Further, the imaging apparatus 10 is provided with a power switch 70, a still image shooting switch 72, a zoom switch 74, a mode switching switch 76, and a moving image shooting switch 78.
The imaging signal generated by the imaging element 18 is amplified by the video signal amplification circuit 42 and supplied to the image data processing unit 44.
The image data processing unit 44 generates moving image data and still image data by performing predetermined signal processing on the image pickup signal, and supplies the moving image data and still image data to the recording / reproducing circuit 56.
The sound signal collected by the microphone 46 is amplified by the microphone amplifier circuit 48, subjected to predetermined signal processing by the sound data processing circuit 50, and supplied to the recording / reproducing circuit 56 as sound data.

The recording / reproducing circuit 56 supplies the moving image data and still image data supplied from the image data processing unit 44 and the audio data supplied from the audio data processing circuit 50 to the recording / reproducing mechanism 60 in accordance with the control of the control circuit 58. The reproduction mechanism 60 records moving image data, still image data, and audio data on a disk-shaped recording medium 2 as a recording medium. In the present embodiment, an optical disc such as a DVD-R is used as the disc-shaped recording medium 2, but it goes without saying that the disc-shaped recording medium may be an optical disc other than the DVD-R or a magneto-optical disc. is there.
The recording / reproducing circuit 56 is mounted with the moving image data and still image data supplied from the image data processing unit 44 and the audio data supplied from the audio data processing circuit 50 in the memory card slot 66 via the interface circuit 64. To the memory card 4 as a recording medium.
The recording / reproducing circuit 56 supplies the moving image data and still image data supplied from the image data processing unit 44 to the display panels 22 and 24 via the drive circuit 62 so as to display an image.
Further, the recording / reproducing circuit 56 supplies the moving image data and still image data supplied from the memory card 4 via the interface circuit 64 to the display panels 22 and 24 via the drive circuit 62 to display an image. At the same time, the audio data supplied from the memory card 4 through the interface circuit 64 is supplied to the speaker 52 through the output amplifier circuit 54 to output the audio.
Further, the recording / reproducing circuit 56 supplies the moving image data and still image data reproduced from the disc-shaped recording medium 2 by the recording / reproducing mechanism 60 to the display panels 22 and 24 via the drive circuit 62 to display an image. At the same time, the audio data reproduced from the disk-shaped recording medium 2 by the recording / reproducing mechanism 60 is supplied to the speaker 52 via the output amplifier circuit 54 to output the audio.

The power switch 70 is operated by operating the power operation member 32, and the control circuit 58 turns on and off the power of the imaging device 10 based on the operation of the power switch 70.
The still image shooting switch 72 is operated by operating the still image shooting member 34, and the control circuit 58 controls the image data processing unit 44 and the recording / reproducing circuit 56 based on the operation of the still image shooting switch 72. By giving a command, the still image data supplied from the image data processing unit 44 to the image data processing unit 44 is supplied from the recording / reproducing circuit 56 to the recording / reproducing mechanism 60, whereby the still image data is recorded on the disc-shaped recording medium 2. Let In other words, the still image shooting member 34 functions as a so-called shutter button.
The zoom switch 74 is operated by the operation of the zoom operation member 36, and the control circuit 58 gives a command to the zoom drive unit 68 based on the operation of the zoom switch 74, whereby the photographic optical system 14 is operated. By moving the zoom lens, the zoom ratio of the photographing optical system 14 is changed.
The mode switching switch 76 is operated by operating the mode switching operation member 38, and the control circuit 58 gives a command to the image data processing unit 44 based on the operation of the mode switching switch 76, whereby the image data A moving image shooting mode in which moving image data is generated by the processing unit 44 and a still image shooting mode in which still image data is generated by the image data processing unit 44 are switched.
In the moving image shooting mode, the moving image data generated by the image data processing unit 44 is recorded on the disc-shaped recording medium 2 or the memory card 4 via the recording / reproducing circuit 56. In the still image shooting mode, the image data processing unit 44 is recorded. The still image data generated in the above is recorded on the disc-shaped recording medium 2 or the memory card 4 via the recording / reproducing circuit 56.
The moving image shooting switch 78 is operated by operating the moving image shooting operation member 40, and the control circuit 58 starts and stops recording of moving image data based on the operation of the moving image shooting switch 78. . That is, the control circuit 58 gives a command to the image data processing unit 44 and the recording / reproducing circuit 56 based on the operation of the moving image shooting switch 78, thereby moving the moving image supplied from the image data processing unit 44 to the image data processing unit 44. By supplying data from the recording / reproducing circuit 56 to the recording / reproducing mechanism 60, the operation for recording the moving image data on the disc-shaped recording medium 2 is started or the operation is stopped. In other words, the moving image shooting operation member 40 functions as a so-called shooting start / stop operation member.

Next, the heat transfer mechanism according to the embodiment will be described.
5A is a perspective view of the substrate 92 to which the image sensor 18 is attached as viewed from the front side, and FIG. 5B is a perspective view of the substrate 92 to which the image sensor 18 is attached as viewed from the back side. 7 is a perspective view showing the configuration of the heat transfer mechanism 80, FIG. 7 is a plan view including a partial cross section of the heat transfer mechanism 80, FIG. 8 is a cross-sectional view taken along the line AA in FIG. It is a disassembled perspective view.
The heat transfer mechanism 80 transmits heat of the image sensor 18 to the heat radiating plate 90, and the heat transfer mechanism 80 includes a holder 82, a heat transfer member 84, a pressing plate 86, and an urging plate 88. Yes.

As shown in FIG. 6, the heat radiating plate 90 is attached to the inside of the left side surface of the case 12 while extending in contact with the inner surface of the left side surface. The heat radiating plate 90 is formed of a material having excellent thermal conductivity, such as copper, and having a function of shielding electromagnetic waves.
A drive circuit 62 (see FIG. 4) of the display panel 22 is disposed in the vicinity of the heat sink 90, and heat generated when the drive circuit 62 operates is transmitted to the heat sink 90 and dissipated. It is planned to be. The display panel 22 is not operated when it is superimposed on the left side surface of the case 12 (closed state), and operates in a state where the display panel 22 is opened outward from the left side surface. The heat is efficiently radiated from the left side surface of the opened case 12 directly into the atmosphere.
As shown in FIG. 3, the lens barrel 16 has a rectangular cross section and extends in the front-rear direction, and is attached in parallel to the heat dissipation plate 90 by a stay 17.

As shown in FIG. 7, the image sensor 18 is arranged with its imaging surface 1802 facing the rear end surface of the lens barrel 16.
As shown in FIGS. 5A and 8, the image sensor 18 has a plurality of connection terminals 1812, and these connection terminals 1804 are connected to the pads on the surface 9202 of the substrate 92 by soldering. The image sensor 18 is mechanically connected, and the image sensor 18 is supported by a substrate 92.
As shown in FIGS. 7 and 8, the substrate 92 has a front surface 9202 and a back surface 9204, the substrate 92 is disposed with the front surface 9202 facing the rear end of the lens barrel 16, and the back surface 1804 of the imaging device 18 is a substrate. It is arranged so as to be separated from the front surface 922 of 92.

The holder 82 is formed of a material having excellent thermal conductivity, and is disposed at a position spaced forward of the substrate 92 as shown in FIGS. 7 and 8. In this embodiment, the holder 82 is parallel to the substrate 92. Is provided.
As the holder 82, for example, a metal material such as copper or aluminum can be used.
As shown in FIGS. 5A, 7, and 8, the holder 82 is disposed on the back surface 1804 of the image sensor 18, and a gap is secured between the holder 82 and the front surface 9202 of the substrate 92.
The portion of the holder 82 facing the back surface 1804 of the image sensor 18 is a heat transfer location 82A that contacts the back surface 1804 of the image sensor 18.
In the present embodiment, the heat transfer point 82A is adhered to the back surface 1804 of the image sensor 18 with an adhesive, and the holder 82 and the image sensor 18 are integrated.
5A and 5B, a screw insertion hole 8202 is formed in the holder 82, and the holder 82 is attached to the lens barrel 16 by a screw 8203 inserted through the screw insertion hole 8202 as shown in FIG. It is attached to the rear.
Therefore, in the present embodiment, the image sensor 18 is attached to the rear end of the lens barrel 16 via the holder 82, and the substrate 92 is attached to the lens barrel 16 via the plurality of connection terminals 1812, the image sensor 18, and the holder 82. It is attached to the rear end.

As shown in FIGS. 5A and 5B, on the front surface 9202 and the back surface 9204 of the substrate 92, chip components 9210 such as an IC, a resistor, and a capacitor that constitute the imaging circuit that operates the imaging device 18, and the imaging device 10. A gyro sensor 9212 and the like for detecting camera shake are mounted.
The substrate 92 is provided with a cable 9214 for connecting the image pickup circuit and the video signal amplification circuit 42, and the image pickup circuit performs an image pickup operation by the image pickup device 18 with the video signal amplification circuit 42. Necessary signals are transmitted and received, and an image pickup signal is supplied to the video signal amplification circuit 42.
As shown in FIGS. 5B, 7, and 8, an opening 9220 is formed at a position of the substrate 92 facing the rear of the image sensor 18, and a heat transfer position 82 </ b> A faces the rear from the opening 9220.
Further, as shown in FIG. 5B, two holes 9222 are formed where the substrate 92 faces the holder 82, and the portion of the holder 82 faces rearward from these holes 9222.

As shown in FIGS. 7 and 8, the heat transfer member 84 is disposed on the back surface of the heat transfer location 82 </ b> A located opposite to the surface of the heat transfer location 82 </ b> A that contacts the back surface 1804 of the image sensor 18.
The heat transfer member 84 is formed of a material having excellent thermal conductivity and insulating properties and elasticity. For example, silicon rubber can be used as such a material.

As shown in FIGS. 6 and 7, the pressing plate 86 is attached to the heat radiating plate 90 and is arranged behind the substrate 92 and spaced apart from the back surface 9204 of the substrate 92, so that the heat transfer member 84 is connected to the heat transfer location 82 </ b> A. Pressed against the back.
The pressing plate 86 is formed of a material having excellent thermal conductivity and conductivity and elasticity. For example, copper can be used as such a material.
The pressing plate 86 includes a mounting plate portion 8602 attached to the heat radiating plate 90, a main body plate portion 8604 that is bent from the mounting plate portion 8602 and extends in parallel with the substrate 92 at a position spaced behind the substrate 92, An upper plate portion 8606 (see FIGS. 6 and 9) that is bent from the main body plate portion 8604 and extends above the upper surface of the lens barrel 16 in parallel with the upper surface of the lens barrel 16 is provided.

As shown in FIGS. 6 and 7, the mounting plate portion 8602 is sandwiched between the portion 1702 of the stay 17 and the heat radiating plate 90 while being sandwiched by the elastic material 87 having excellent thermal conductivity and insulation and elasticity. It is fixed. That is, the screw 1708 inserted through the case 12 and the heat sink 90 is screwed into a screw hole 1706 provided in the end 1704 of the stay 17, so that the heat sink 90 is elastically formed by the portion 1702 of the stay 17. 87 is sandwiched between them.
In the present embodiment, the elastic member 87 is made of the same material as the heat transfer member 84, and is made of, for example, silicon rubber.
The main body plate portion 8604 is provided with a convex portion 8610. The convex portion 8610 passes through the opening 9220 and abuts against the heat transfer member 84 to press the heat transfer member 84 against the heat transfer location 82A.
In the present embodiment, heat transfer member 84 and convex portion 8610 are bonded with an adhesive.
Further, as shown in FIGS. 7 and 9, holes 8612 are respectively formed at locations where the main body plate portion 8604 faces the back surface 9204 of the substrate 92 at a plurality of locations across the heat transfer location 82 </ b> A.
As shown in FIGS. 6 and 9, an insulating sheet 8608 is attached to the upper surface of the plate portion 8606 so as to electrically insulate it from an unillustrated board or electronic component adjacent to the upper plate portion 8606.

The urging plate 88 urges the pressing plate 86 in a direction in which the heat transfer member 84 is pressed against the heat transfer location 82A.
The urging plate 88 is made of an insulating material. As such a material, for example, a synthetic resin such as an ABS resin can be used.
As shown in FIGS. 7 and 8, the biasing plate 88 includes a plate portion 8802 that elastically contacts the main body plate portion 8604 from the rear of the main body plate portion 8604 of the pressing plate 86 and biases the main body plate portion 8604 forward. Have.
As shown in FIGS. 7 and 9, a boss portion 8804 and two columnar stoppers 8806 are formed on the plate portion 8802.
The boss portion 8804 is brought into contact with the holder 82 via the notch portion 8830 (FIG. 9) of the main body plate portion 8602 of the pressing plate 86 and the notch portion 9230 (FIG. 5B) of the substrate 92, and the boss portion 8804 and the holder 82 is attached to the rear end of the lens barrel 16 by a screw 8810 through which a screw inserted through a screw insertion hole 8210 is inserted.
The two stoppers 8806 are respectively inserted into the holes 8612 of the pressing plate 86 and the holes 9222 of the substrate 92 and are brought into contact with the holder 82, whereby the front limit position of the plate portion 8802 is determined.

According to the present embodiment, the heat generated by the image sensor 18 is transmitted to the heat radiating plate 90 through the path of the heat transfer location 82A of the holder 82, the heat transfer member 84, and the pressing plate 86. This is advantageous in stabilizing the operation of the image sensor 18.
In addition, since the heat transfer mechanism 80 is composed of simple members such as the holder 82, the heat transfer member 84, and the pressing plate 86, the structure is simpler than that in the case of using a heat pipe as in the prior art, and the size is reduced. This is advantageous for cost reduction.
Further, since the pressing plate 86 is electrically insulated from the image sensor 18 by the heat transfer member 84, the pressing plate 86 is prevented from functioning as an antenna, and unnecessary radiation generated from the image sensor 18 is applied to the pressing plate 86. Since transmission can be suppressed, it is advantageous in preventing the generation of unnecessary radiation due to electromagnetic waves generated with the operation of the image sensor 18.

In this embodiment, even if unnecessary radiation is transmitted to the pressing plate 86, the pressing plate 86 is electrically insulated from the heat radiating plate 90 by the elastic member 87, so that it is transmitted to the pressing plate 86. It is possible to suppress unnecessary radiation from being further transmitted to the heat radiating plate 90 so that the heat radiating plate 90 functions as an antenna, which is more advantageous in preventing the generation of unnecessary radiation due to electromagnetic waves generated along with the operation of the image sensor 18.
In this embodiment, since the pressing plate 86 is disposed via the heat transfer member 84 and the elastic member 87 having elasticity, vibration and impact applied to the case 12 are elastic with the heat transfer member 84. It is relaxed by the member 87 and is advantageous in suppressing vibration and impact applied to the image sensor 18.
Further, in the present embodiment, the urging plate 88 is provided, and the urging plate 88 urges the pressing plate 86 in a direction to press the heat transfer member 84 against the heat transfer location 82A. Heat can be radiated more efficiently, which is more advantageous in stabilizing the operation of the image sensor 18.
Further, in this embodiment, since the upper plate portion 8606 is provided on the pressing plate 86, a part of the heat transmitted to the pressing plate 86 is radiated from the upper plate portion 8606 to the air in the case 12. This is more advantageous in improving the heat dissipation effect.

In this embodiment, the case where an optical disk or a memory card as a disk-shaped recording medium is used as the recording medium has been described. However, the recording medium is not limited to these, and for example, as a tape-shaped recording medium It may be a magnetic tape, a removable hard disk drive device, a hard disk drive device built in the case 12, or a semiconductor memory.
In the embodiment, the case where the imaging apparatus 10 performs both recording and reproduction of moving image data and still image data has been described. However, only one of recording and reproduction of moving image data and still image data is performed. Of course, it may be.

1 is a perspective view illustrating a configuration of an imaging apparatus 10 according to a first embodiment. 1 is a perspective view illustrating a configuration of an imaging apparatus 10 according to a first embodiment. 1 is a perspective view illustrating a configuration of an imaging apparatus 10 according to a first embodiment. 3 is a block diagram illustrating a configuration of a control system of the imaging apparatus 10. FIG. (A) is the perspective view which looked at the board | substrate 92 to which the image pick-up element 18 was attached from the surface side, (B) is the perspective view which looked at the board | substrate 92 to which the image pick-up element 18 was attached from the back side. 3 is a perspective view showing a configuration of a heat transfer mechanism 80. FIG. 3 is a plan view including a partial cross section of a heat transfer mechanism 80. FIG. It is AA sectional view taken on the line of FIG. 3 is an exploded perspective view showing a configuration of a heat transfer mechanism 80. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Imaging device, 12 ... Case, 14 ... Imaging optical system, 16 ... Lens barrel, 18 ... Imaging element, 80 ... Heat transfer mechanism, 82 ... Holder, 84 ... Heat transfer member, 86 ...... Pressing plate, 88 ... Biasing plate, 90 ... Heat sink, 92 ... Substrate.

Claims (6)

A case constituting the exterior;
A photographic optical system is housed and extends in the front-rear direction in the case, and its front part is provided so as to face the front surface of the case; and
An imaging device disposed at the rear end of the lens barrel and having an imaging surface facing the imaging optical system;
A substrate provided with an imaging circuit for supporting the imaging element and operating the imaging element;
A heat sink provided to extend along the inner surface of the case;
A heat transfer mechanism that transfers heat of the image sensor to the heat sink;
An imaging device comprising:
The heat transfer mechanism is
A holder formed of a material having excellent thermal conductivity and attached to the lens barrel and disposed at a location spaced in front of the substrate;
A heat transfer location in contact with the back surface of the imaging element located opposite to the imaging surface at a location spaced forward of the substrate at the holder portion;
A heat transfer member that is formed from a material having excellent thermal conductivity and has insulating properties and elasticity, and that faces the back surface of the heat transfer location that is opposite to the surface of the heat transfer location that contacts the back surface of the imaging element;
A pressing plate that is formed of a material having excellent thermal conductivity and has conductivity and elasticity, is attached to the heat radiating plate and is spaced apart from the substrate, and presses the heat transfer member against the back surface of the heat transfer location;
An imaging apparatus comprising: The substrate has a front surface and a back surface, and the substrate is disposed with the front surface facing the rear end of the lens barrel,
The imaging device is supported by the substrate such that the back surface thereof is spaced forward of the front surface of the substrate,
The rear surface of the heat transfer location is spaced forward from the front surface of the substrate,
The substrate is formed with an opening that exposes the back surface of the imaging element to the back surface of the substrate.
The pressing plate is provided with a convex portion that contacts the heat transfer member through the opening and presses the heat transfer member against the heat transfer location.
The imaging apparatus according to claim 1. The pressing plate is attached to the heat radiating plate in a state of interposing a member having excellent thermal conductivity and insulating properties,
The imaging apparatus according to claim 1. An urging plate is provided that urges the pressing plate in a direction of pressing the heat transfer member against the heat transfer portion, formed from an insulating material.
The imaging apparatus according to claim 1. An urging plate that urges the pressing plate in a direction that is formed from an insulating material and presses the heat transfer member against the heat transfer location is provided,
The pressing plate has a main body plate portion that extends in parallel with the substrate at a location spaced rearward of the substrate,
The biasing plate is attached to the rear end of the barrel,
The biasing plate has a plate portion that elastically contacts the main body plate portion from the rear of the main body plate portion and biases the main body plate portion forward,
The plate portion is provided with a stopper projecting through the hole in the main body plate portion and the hole in the substrate so as to contact the holder and determine the limit position forward of the plate portion.
The imaging apparatus according to claim 1. An urging plate that urges the pressing plate in a direction that is formed from an insulating material and presses the heat transfer member against the heat transfer location is provided,
The pressing plate has a main body plate portion that extends in parallel with the substrate at a location spaced rearward of the substrate,
The biasing plate is attached to the rear end of the barrel,
The biasing plate has a plate portion that elastically contacts the main body plate portion from the rear of the main body plate portion and biases the main body plate portion forward,
The plate portion is provided with a stopper projecting through the hole in the main body plate portion and the hole in the substrate to determine the limit position forward of the plate portion in contact with the holder,
The hole of the main body plate portion and the hole of the substrate and the stopper are provided at a plurality of locations across the heat transfer location,
The imaging apparatus according to claim 1.

Images