JPH07154656A - Structure of heat dissipation of video camera - Google Patents

Abstract

PURPOSE:To warrant the quality for a long time and to avoid an increased size for a camera. CONSTITUTION:Heat sink fins 16, 24 are provided to an upper wall plate 3 and a lower plate 4 of a camera case 7 and heat sink plates 28, 29 are provided to side plates 26, 27. Thus, a heat generated from an electronic component in the camera case 7 is delivered to the upper and lower wall plates 3, 4 and the side plates 26, 27 and dissipated in air from the upper lower wall plates 3, 4 and the side plates 26, 27 via the heat sink fins 16, 24 and the heat sink plates 28, 29, then it is not required to provide a duct to the camera case or to increase the outer size of the camera case different from a conventional camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipation structure of a video camera suitable for use in, for example, factory automation equipment (FA equipment).

[0002]

2. Description of the Related Art In recent years, a video camera having a CCD (charge transfer device) is often used as an image pickup device because it has excellent characteristics and is suitable for mass production.

Conventionally, this type of video camera has a CCD
A camera housing with a built-in camera and a camera mounting surface, a screw hole that is attached to the front end of the camera housing and opens in the optical axis direction (front-back direction), and a lens barrel attachment that is exposed at the opening periphery of the screw hole A front panel having a surface and a lens barrel having an opening end face that is screwed into a screw hole of the front panel and is in contact with the lens barrel mounting surface are employed.

In the video camera constructed as described above, it is necessary to prevent failure and performance deterioration of electronic parts including CCD due to temperature rise due to use of the camera. As a structure for dissipating heat from the wall plate of the camera, the temperature rise inside the camera housing is suppressed.

[0005]

However, in the former case, since the inside and outside of the camera housing are communicated with each other, dust or the like may enter the inside of the camera housing from the outside of the camera housing, and the electronic parts may malfunction. Alternatively, there is a problem that quality cannot be guaranteed for a long period of time due to performance deterioration.

On the other hand, in the latter case, in order to obtain an effective heat dissipation structure, it is necessary to set the outer dimensions of the camera housing to a considerably large dimension, which causes a problem that the entire camera becomes large.

The present invention has been made in view of the above circumstances, and provides a heat dissipation structure for a video camera, which can guarantee the quality for a long period of time and prevent an increase in the size of the entire camera. To do.

[0008]

A heat dissipation structure of a video camera according to the present invention is one in which heat dissipation fins are provided on each wall plate of a camera housing.

In a heat dissipation structure for a video camera according to another invention (Claim 2) of the present invention, a part of the heat dissipation fins is formed by a heat dissipation plate facing the wall plate, and these heat dissipation plates have columns on the wall plate. It is installed through.

[0010]

In the present invention, the heat generated from the electronic parts in the camera housing is transmitted to the wall plates and is dissipated into the atmosphere from these wall plates through the radiation fins.

In another aspect of the present invention, an air passage is formed between the wall plate and the heat radiating plate, the air passage opening in the horizontal direction and the vertical direction.

[0012]

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

1A and 1B are a longitudinal sectional view and a lateral sectional view showing a heat dissipation structure of a video camera according to the present invention, and FIG.
Is a sectional view showing an image pickup device (CCD) of the heat dissipation structure of the video camera according to the present invention, FIG. 3 is a sectional view showing a front plate (front panel) of the video camera, and FIG. 4 is an exploded perspective view showing the entire video camera. 5A and 5B are perspective views showing the appearance of the video camera, FIGS. 6A and 6B are plan views and front views showing the entire video camera, and FIGS. 7A and 7B are the entire video camera. It is the right side view and bottom view which are shown.

In FIG. 1, reference numeral M denotes a high-definition video camera, which has a main body 1 having a generally rectangular parallelepiped appearance, and a plurality of lenses 2a detachably provided on the front surface of the main body 1. And the lens barrel 2.

[Main Body of Video Camera] This main body 1 has a camera housing 7 having two sets of upper, lower, left, and right wall plates 3 to 6 which face each other, and which opens in the front-rear direction, and the front of the camera housing 7. A front plate 8 having a screw hole 8a for mounting a lens as a through hole that is attached to the opening and opens in the optical axis direction, and is attached to the rear opening of the camera housing 7 provided behind the front plate 8. And a rear face plate 10 having a through hole 9 for external connection that is open on both front and back sides, and is entirely formed by aluminum die casting or zinc die casting.

[Case] The camera case 7 contains a CCD 11 as an image pickup device for receiving an optical image taken by the lens 2a, and a plurality of printed circuit boards 12 connected to the CCD 11.

The upper wall plate 3 of the wall plates 3 to 6 of the camera housing 7 vertically penetrates a stepped hole 13 for mounting a metal fitting which is open on both front and back sides and a stepped portion 13a of the stepped hole 13. It is formed by an upper panel having a substantially U-shaped cross-section when it has a screw hole 13b into which a mounting screw a is screwed.

The stepped hole 1 is formed at the front edge of the upper wall plate 3.
A flat first upper camera mounting surface 1 including the outer peripheral edge of 3
4 is formed, and a flat second upper camera mounting surface 15 located on the same surface as the first upper camera mounting surface 14 is formed at the rear edge.

A radiating fin 16 is provided between the upper camera mounting surfaces 14 and 15 of the upper wall plate 3 by forming an uneven portion extending in the front-rear direction and parallel to the left-right direction. .

Further, the front and rear edges of the upper wall plate 3 are arranged in parallel with each other in the left-right direction at a predetermined interval, and on the first camera mounting surface 14 and the second camera mounting surface 15, respectively. Screw holes 17 and 18 for camera mounting to open
Is provided.

Furthermore, on the back sides of both side portions of the upper wall plate 2,
It has a panel mounting screw hole 19a which is opened in the front-rear direction and into which the mounting screws b and c are screwed, and a side plate mounting screw hole 19b which is opened in the left-right direction and into which the mounting screw d is screwed and extends in the front-rear direction. The mounting portion 19 is integrally provided.

On the other hand, the lower wall plate 4 of the camera housing 7 has a frame 20 facing a part of the printed boards 12a of the printed boards 12 and a notch 2 located in front of the frame 20.
1 is formed by a main brazing panel having a substantially U-shaped cross section.

At the rear edge of the lower wall plate 4, there are provided screw holes 22 for camera attachment which are located at a predetermined interval in the left-right direction and open downward, and extend in the left-right direction including the peripheral edges of these screw holes 22. A flat second lower camera mounting surface 23 is formed.

The radiating fins 24 are formed on the front portion of the second lower camera mounting surface 23 of the lower wall plate 4 by forming an uneven portion extending in the front-rear direction and juxtaposed in the left-right direction.
Is provided.

The lower wall plate 4 has the cutout 21.
Is formed with a stepped surface 4a having a U-shape in a plan view extending along the peripheral edge of the inner opening.

Further, on both sides of the lower wall plate 4, mounting screws e, which are opened in the axial direction of the screw holes 19a, 19b, are provided.
Mounting having screw holes 25a, 25b into which f is screwed, a screw hole 25c for holder mounting in which the mounting screw g is screwed, and a positioning pin 25d protruding in the same direction as the opening direction of the screw hole 25c. The part 25 is integrally provided.

Next, the side wall plates 5 and 6 of the wall plates 3 to 6 of the camera housing 7 will be described.
Are side plates 26 and 27 with which the upper edge and the lower edge contact the both mounting portions 19 and 25, respectively, and base pieces 28a and 29a having rear surfaces facing the outer side surfaces of these side plates 26 and 27, and these base pieces. 28a, 29a, and a side panel composed of two side pieces 28b, 29b and heat radiation plates 28, 29.

The side plates 26, 27 and the heat radiating plate 28,
Since 29 are configured substantially the same, only one of them (the side plate 26 and the heat radiating plate 28) will be described. In the side plate 26, screw insertion holes 26a, which are open on both front and back surfaces (both inner and outer surfaces),
26b and a positioning hole 26c are provided.

Further, the heat dissipation plate 28 is provided with two opening portions 31 and 32 which are adjacent to each other with a partition portion 30 therebetween, straddling the base piece 28a and the side piece 28b.

On the heat dissipation plate 28, a plurality of columns 33, 34 projecting from the back surface of the base piece 28a and arranged in parallel along the upper and lower edges, and the columns 33, 34.
There are provided two heat transfer blocks 35 (only one is shown) that project in the same direction as the projecting direction of and are arranged in parallel in the front-rear direction with a predetermined interval.

The columns 33 and 34 of the heat radiating plate 28 are flat tip surfaces 33a and 34 that are in contact with the outer surface of the side plate 26.
It is formed by a cylinder having a.

Among them, the support screw 33 has a screw insertion hole 3 through which the mounting screw d is continuously inserted into the screw insertion hole 26b.
3b is provided.

Further, a mounting screw h is attached to the column 34 (a part).
Is a screw hole 34 through which the screw insertion hole 26a is inserted and screwed.
b is provided.

On the other hand, the heat transfer block 35 of the heat sink 28
Like the columns 33 and 34, the two convex portions 36 that have a flat tip surface 36a that faces the outer surface of the side plate 26 and that are parallel to each other at a predetermined interval in the vertical direction, and between these convex portions 36. It is formed by the reinforcing ribs 37 interposed between.

Of the protrusions 36 of the heat transfer block 35, a protrusion 38 facing the positioning hole 26c is integrally provided on the tip surface 36a of the lower protrusion 36.

[Front Plate] The front plate 8 has the screw holes 8
A substantially rectangular box with a bottom that has a flat lens barrel mounting surface 8b exposed on the outer peripheral edge of the inner and outer openings of a and screw insertion holes 8c, 8d through which the mounting screws b, e are inserted It is formed by a front panel.

On the rear surface of the front plate 8, two block bodies 39, 4 are arranged in parallel with each other in the left-right direction at a predetermined interval and project in the vicinity of the inner opening of the screw hole 8a.
0 are integrally provided, and both block bodies 39,
First positioning pins 41 and 42, which are arranged in parallel with each other in the vertical direction at a predetermined interval in the vertical direction and project rearward, and screw holes into which mounting screws i are screwed and are located between the first positioning pins 41 and 42. 43 and 44 are provided.

Further, on the back surface of the front plate 8, there is provided a second positioning pin 45 projecting rearward, and the both block bodies 3 are provided.
Of the reference numerals 9 and 40, a post 46 connected to the upper end of the left block body 39 and a second positioning pin 47 protruding rearward like the second positioning pin 45 are provided and are located below the right block body 40. The support column 48 is integrally provided.

At the lower edge of the opening edge of the front plate 8, an end plate 49 having a stepped surface 49a facing the stepped surface 4a and facing the notch 21 is integrally provided. There is.

The end plate 49 has a stepped hole 50 for mounting a metal fitting, which is open on both front and back surfaces, and a stepped portion 50a of the stepped hole 50.
Is formed by a sub-row panel having a screw hole 51 penetrating in the vertical direction at the rear end thereof and into which a mounting screw j is screwed.

On the surface of the end plate 49, the stepped hole 50 is formed.
A second lower camera mounting surface 52 including the outer opening peripheral edge and being perpendicular to the lens mounting surface 8b is formed.

Further, the end plate 49 is provided with a positioning hole 53 opening to the second lower camera mounting surface 52 and a camera mounting screw hole 54 opening downward.

[Rear Plate] The rear plate 10 is formed by a substantially rectangular box-shaped rear panel having a screw insertion hole 10a through which the mounting screw c is inserted and opening to the front.

"Lens barrel of video camera" This lens barrel 2 is composed of two front and rear cylindrical bodies 2 having different diameters.
b, 2c.

The lens 2a is built in the front cylindrical body 2b of the two cylindrical bodies 2b, 2c of the lens barrel 2, and the screw hole 8a is exposed to the rear cylindrical body 2c.
A screw portion 55 that is screwed inside is provided.

Reference numeral 56 denotes a light transmission window 56a which opens in the front-rear direction.
And a CCD holder having a substantially rectangular shape in plan view, which has a ring 56b projecting from the front opening edge of the light transmitting window 56a. The CCD holder is provided inside the camera housing 7 and fixed to the tip surfaces of the block bodies 39 and 40. And is entirely formed by aluminum die casting or zinc die casting.

The left and right edges of the CCD holder 56 are provided with first pin holes 57, 58 and second pin holes 59, 60 facing the first positioning pins 41, 42 and the second positioning pins 45, 47. A screw insertion hole 61 through which the mounting screw i is inserted is provided between the two first pin holes 57 and 58.

Further, on the rear end surface of the CCD holder 56, two CCD positioning pins 62 juxtaposed in parallel with each other in the left-right direction at predetermined intervals and projecting to the rear and these CCs are provided.
A screw hole 63 (only one of which is shown) is provided above the D positioning pin 62 and into which a mounting screw k inserted through the package 11a of the CCD 11 is screwed.

Reference numeral 64 denotes a heat transfer plate for heat dissipation, which is fixed to the CCD holder 56 via the CCD 11 so as to face the opening surface of the screw hole 8a, and the whole faces the back surface of the package 11a. The base piece 64a and the side pieces 64b and 64c that are bent and formed on both side edges of the base piece 64a and face the back surfaces of the side plates 26 and 27 are formed of an aluminum plate having a U-shaped cross section.

In the base piece 64a of the heat transfer plate 64, there are two screw insertion holes 65 (only one is shown), which are located at a predetermined interval in the left-right direction and through which the mounting screws k pass, and these screw insertion holes 65. Two pin holes 66 (only one of which is shown) which is located below and faces the CCD positioning pin 62 are provided.

Further, the base piece 64a of the heat transfer plate 64 is provided with a through window 67 which opens in the axial direction of the screw insertion hole 61 and the screw holes 43 and 44.

On the other hand, the side pieces 64b of the heat transfer plate 64,
The 64c is provided with rubber positioning pins 68 and 69 protruding toward the back surfaces of the side plates 26 and 27.

Reference numeral 70 is a bottomed rectangular box-shaped substrate holder having holder mounting pieces 70a and 70b on both left and right edges thereof, and is fitted into the upper opening of the frame portion 20 and the mounting screw f is attached to the mounting portion 25. The printed circuit board 12b of the printed circuit board 12 is held by the printed circuit board 12b.

Holder holder piece 7 of the substrate holder 70
0a and 70b, a screw insertion hole 71 through which the mounting screw g is inserted and a pin hole 72 through which the positioning pin 25d faces.
Is provided.

Reference numeral 73 denotes a pin hole 73a exposed by the positioning pin 62 and a screw insertion hole 73 through which the mounting screw k is inserted.
b is a first heat conductive rubber having a rectangular shape in a plan view, which is interposed between the base piece 64a of the heat transfer plate 64 and the back surface of the package 11a, and is entirely made of silicon containing a conductive material ( Si) made of rubber.

Reference numeral 74 is a second heat conductive rubber having a rectangular shape in plan view, which has a pin hole 74a exposed by the rubber positioning pins 68 and 69 and rectangular holes 74b located on both sides of the pin hole 74a. It is made of a reinforced conductive sheet containing glass fibers, and is interposed between each side piece 64b, 64c of the heat transfer plate 64 and the back surface of each side plate 26, 27.

75 is a square shape in a plan view (rectangular shape in a plan view)
The third heat conductive rubber of No. 3, which is made of conductive silicon rubber and a reinforcing conductive sheet containing glass fiber, similar to the second heat conductive rubber 74, and includes the integrated circuit element E on the printed circuit board 12b and the side plates 26. , 27 on the back surface (the back surface of the upper wall plate 3) and between the holder mounting pieces 70a, 70b of the substrate holders 70 and the upper surfaces of the mounting portions 25.

Reference numeral 76 is a fourth heat conductive rubber having a substantially square shape in plan view, and is formed on the outer side surfaces of the side plates 26 and 27 and the convex portions 36.
The first heat-conductive rubber 73 and the first heat-conductive rubber 73 are formed of silicon rubber mixed with a conductive material.

The fourth heat conductive rubber 76 is provided with an opening 76a through which the protrusion 38 is inserted.

Reference numeral 77 denotes a first metal fitting for mounting the camera, which has a base portion 78 having a screw hole 78a opening upward and through which the stepped hole 13 is inserted, and a mounting portion integrally provided at an upper end portion of the base portion 78. It is composed of a flange portion 79 having three screw insertion holes 79a through which the screw a is inserted, and is fixed on the step portion 13a.

Reference numeral 80 denotes a second metal fitting for mounting the camera, which has a base portion 81 having a screw hole 81a opening upward and through which the stepped hole 50 is inserted, and a base portion 81 integrally provided at a lower end portion of the mounting portion. The flange portion 82 has three screw insertion holes 82a through which the screws j are inserted, and is fixed on the step portion 50a.

In the video camera constructed as described above, the heat generated from the integrated circuit elements E on the left and right printed circuit boards 12b is passed through the third heat conductive rubbers 75 to the side plates 2 respectively.
6 and 27, are transmitted from the side plates 26 and 27 to the heat dissipation plates 28 and 29 through the fourth heat conductive rubber 76 and the heat transfer block 35, and are generated from the integrated circuit element E on the upper printed circuit board 12b. Heat is the third heat conductive rubber 7
5 and the upper wall plate 3 to the heat radiating fins 16, and are radiated into the atmosphere from the heat radiating plates 28 and 29 and the heat radiating fins 16.

On the other hand, the heat generated from the printed board 12 is transmitted to the board holder 70, and the third heat conductive rubber 75 is transferred from the holder mounting pieces 70a and 70b of the board holder 70.
Also, it is transmitted to the heat radiation fins 24 via the lower wall plate 4, and is diffused into the atmosphere from the heat radiation fins 24.

In this case, since the surface area of the camera housing 7 is increased by the heat dissipating fins 16 and 24 and the heat dissipating plates 28 and 29, heat generated from the electronic components including the CCD 11 in the main body 2 is distributed to the four sides of the camera housing 7. It is possible to dissipate, and it is possible to prevent the occurrence of failure and performance deterioration of electronic components due to temperature rise.

Further, in the present embodiment, C in the main body 1
The heat generated from the CD 11 is transmitted to the heat transfer plate 64 via the first heat conductive rubber 73, and is transmitted from the heat transfer plate 64 to the side plates 26 and 27 via the second heat conductive rubber 74. Emitted from 26 and 27 into the atmosphere.

In this case, the CCD 11 and the side plates 26, 2 are separated by the first heat conductive rubber 73 and the second heat conductive rubber 74.
Since the heat path resistance between 7 becomes small, C
It is possible to prevent a failure and performance deterioration of the CD 11.

Therefore, in this embodiment, as in the conventional case, a ventilation hole is provided in the camera housing as a heat dissipation structure,
Alternatively, it is not necessary to set the external dimensions of the camera housing to large dimensions.

Further, in this embodiment, the heat dissipation plate 28,
29 is attached to the side plates 26 and 27 via the columns 33 and 34, which means that the left and right side plates 2 are attached by the columns 33 and 34.
Air passages that open in the front-back (horizontal) direction and the vertical (vertical) direction are formed between the heat sinks 6 and 27 and the heat sinks 28 and 29.

Furthermore, in this embodiment, when the lens barrel 2 is attached to the front plate 8, this lens barrel 2
The optical axis of the lens is orthogonal to the lens barrel mounting surface 8b which is perpendicular to the second lower camera mounting surface 52 of the end plate 49.

Therefore, since it is not necessary to increase the mounting accuracy of the front plate 8 to the camera housing 7 at the time of manufacturing the camera as in the conventional case, the working operation of the camera housing 7 and the front plate 8 at the time of manufacturing the camera can be easily performed. be able to.

In this embodiment, the transmission plate 64 is formed of an aluminum plate, but the present invention is not limited to this, and a metal plate such as copper may be used. In this case, the heat radiation effect can be further enhanced.

Further, the material of the heat conductive rubber in the present invention is not particularly limited to the above-mentioned embodiment, and each heat conductive rubber is in close contact with the heat transfer plate 64, the side plates 26, 27, etc. to have a heat path resistance. It should be something that makes it smaller.

Besides, in the present embodiment, an example in which the present invention is applied to the FA device has been shown, but the present invention is not limited to this, and can be applied to, for example, an image processing device as in the embodiment.

[0074]

As described above, according to the present invention, since the radiating fins are provided on each wall plate of the camera housing, the heat generated from the electronic components in the camera housing is transmitted to the wall boards, and these wall boards are mounted. Is emitted to the atmosphere through the radiation fins.

Therefore, it is not necessary to provide a ventilation hole in the camera housing as a heat dissipation structure or to set the outer dimensions of the camera housing to a large size as in the conventional case, so that the quality is guaranteed for a long period of time. It is possible to prevent the size of the entire camera from increasing.

In claim 2, a part of the radiation fins is
It is formed by heat dissipation plates facing the wall plate, and since these heat dissipation plates are attached to the wall plates via columns, air paths that are opened horizontally and vertically between the wall plates and the heat sink by these columns. Is formed, and the same heat dissipation effect can be obtained when the camera housing is in the horizontal and vertical postures.

[Brief description of drawings]

1A and 1B are a longitudinal sectional view and a lateral sectional view showing a heat dissipation structure of a video camera according to the present invention.

FIG. 2 is a sectional view showing an image sensor of a heat dissipation structure of the video camera according to the present invention.

FIG. 3 is a sectional view showing a front plate of the video camera.

FIG. 4 is an exploded perspective view showing the entire video camera.

FIG. 5 is a perspective view showing the appearance of a video camera.

6A and 6B are a plan view and a front view showing the entire video camera.

7A and 7B are a right side view and a bottom view showing the entire video camera.

[Explanation of symbols]

 3 ... Upper wall plate 4 ... Lower wall plate 5, 6 ... Side wall plate 7 ... Camera housing 11 ... CCD 12, 12a, 12b ... Printed circuit board 16, 24 ... Radiating fins 28, 29 ... Radiating plate 33, 34 ... Strut 35 … Heat transfer block E… Integrated circuit element M… Video camera

Claims (2)

[Claims] 1. A video camera having a camera housing having upper, lower, left and right wall plates facing each other and containing electronic components, wherein heat dissipation fins are provided on each wall plate of the camera housing. Characteristic video camera heat dissipation structure. 2. A part of the heat dissipation fins is formed by a heat dissipation plate facing the wall plate, and the heat dissipation plate is attached to the wall plate via a column. The heat dissipation structure for the video camera according to claim 1.