JP2003161994A - Waterproof housing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof housing for which the need of clouding preventing operation is eliminated by suppressing the occurrence of frost setting with moisture on the inner surface of a transparent glass plate to take in a light image. <P>SOLUTION: An outside glass plate 31 is attached to the outside of a glass plate 32 attached at the front end part of a lens barrel 33 through a cylindrical body 85 made of aluminum by die casting, and a hermetically sealed space is formed between them, so that the frost setting with the moisture in air between the glass plates 31 and 32 is caused on the inner peripheral surface of the lens barrel 85 in the case of being exposed in the atmosphere of low temperature. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof housing, and more particularly to a waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window.

[0002]

2. Description of the Related Art Electronic still cameras and video cameras are vulnerable to water, and when used in the rain, water may penetrate into the interior and cause malfunction. Ordinary electronic still cameras and video cameras do not have a waterproof structure,
In principle, it is impossible to perform imaging in water.

In order to eliminate such inconvenience, for example, as disclosed in Japanese Patent No. 3189843, an electronic still camera or a video camera is used by being housed in a case having a waterproof structure or a drip-proof structure. I am trying to do it. When such a waterproof case or drip-proof case is used, it can be used in the rain or imaged in the water.

[0004]

When a still camera or a video camera is housed in such a waterproof housing for taking an image, the temperature in the water is lower than that in the atmosphere when the camera is submerged in the water. The water contained in is condensed. When such condensed water adheres to the inner surface of the glass forming the transparent window, fogging occurs. Such fogging creates a shadow in the image captured through the transparent window, and a clean image cannot be obtained.

As a measure for preventing the inner surface of the windshield from being fogged, a silica gel or the like which absorbs water is put in the housing and the temperature is lowered when the housing is put in water. The condensed water is absorbed by the silica gel. However, such anti-fog measures using silica gel have no convenient effect when they are used in water unless the silica gel is put into the housing for several hours before the housing is sealed, and there is a troublesome drawback of preparing in advance. . Alternatively, a solvent that lowers the surface tension of water is applied to the surface of the glass to prevent water from condensing on the surface of the glass. The application of such a solvent for reducing the surface tension produces an effect just before use, but the effect is lost when the solvent dries.
Alternatively, there is a drawback of paying attention to the setting.

Furthermore, the surface of the glass is subjected to a water repellent treatment by fluorine coating. When such a process is performed, the surface tension of water is increased, and the water drops become water drops, and the water drops drop downward from the surface of the windshield. However, when such measures with a fluorine coating are applied to the inner surface of the glass plate of the waterproof housing, traces of water flow on the windshield are formed on the glass surface, and such traces of water flow are shown on the image. And the image is deteriorated, which is not preferable.

The present invention has been made in view of the above problems, and is intended to effectively and surely prevent moisture from condensing on the inner surface of a transparent plate or a glass plate constituting a transparent window. It aims at providing the waterproof housing which was made into.

[0008]

According to another aspect of the present invention, in a waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, the transparent window is composed of a pair of transparent plates. The present invention relates to a waterproof housing, characterized in that a space between the pair of transparent plates is a hermetically sealed space, and a cylinder forming the hermetically sealed space is made of a material having a higher thermal conductivity than the transparent plate.

Here, the outer surface of the cylindrical body is exposed to the outside,
It may be in contact with the external atmosphere. Further, the pair of transparent plates may be made of glass, and the cylindrical body may be made of metal. Further, the cylindrical body may be made of aluminum or aluminum alloy.

According to another invention of the present application, in a waterproof housing in which optical equipment is housed and an optical image is taken in through a glass plate of a transparent window, the transparent window is continuously provided on the front side of the housing. The inner glass plate is formed of a lens barrel, and the inner glass plate is attached so as to close the opening of the lens barrel. The outer glass plate held by the tubular body is detachably attached to the outer side of the inner glass plate. A waterproof housing, characterized in that a closed space is formed between the outer glass plate and the inner glass plate by a tubular body, and the tubular body is made of a material having a higher thermal conductivity than the glass plate. It is about.

Here, the cylindrical body may be manufactured by aluminum die casting. In addition, a water-absorbing member that absorbs condensed moisture may be attached to the inner peripheral surface of the cylindrical body.

Still another invention of the present application is a waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, wherein the transparent window is composed of two transparent plates, and the transparent window is formed. The present invention relates to a waterproof housing in which a material having a thermal conductivity lower than that of the transparent plate is interposed and bonded between the plates.

Still another invention of the present application is a waterproof housing in which an optical device is housed therein and an optical image is taken in through a transparent window, and two glass plates are provided inside and outside the opening of the housing constituting the transparent window. The present invention relates to a waterproof housing which is hermetically sealed by a plate, and a transparent material having a lower thermal conductivity than that of the glass plate is interposed between the two glass plates.

Here, the transparent material having a low thermal conductivity may be a transparent resin film. The transparent material having a low thermal conductivity may be a polycarbonate film.
Further, it is preferable that the outer transparent plate or the glass plate is in contact with the external atmosphere and has a strength to withstand the atmospheric pressure.

A preferred embodiment of the invention contained in the present application is a waterproof housing for accommodating an electronic still camera, a video camera or the like therein for use in rain or water,
When the outside temperature is low compared to the sealed inside temperature and humidity, fogging occurs on the inside surface of the windshield of the transparent window, which may cause fatal damage to images from cameras, etc. The fogging is prevented by using a cylinder made of a member having a high ratio and incorporating two glass plates having an air layer in the middle. Fogging is prevented by providing an air layer in a closed space formed between two laminated glasses in the middle. Here, in order to facilitate the handling of the air layer between the two laminated glass, 2
Make it easy to separate the glass plates. In order to enable the above structure, the outer glass plate is attached to a cylinder made of a material such as aluminum die-casting, which has a higher thermal conductivity than glass, and this cylinder holds the inner glass plate. It is designed to be attached to the front of the lens barrel.

According to this structure, it is not necessary to seal the waterproof pack for several hours in order to use it as a measure to prevent fogging with silica gel. In addition, it is not necessary to set the glass plate before using it unlike the case of using a solvent that lowers the surface tension of the glass plate. This eliminates the need for anti-fog measures and reduces costs.

Another aspect of the invention included in the present application is a waterproof housing for housing an optical device such as an electronic still camera or a video camera for use in rain or water, which is external to the temperature and humidity inside the sealed interior. When the temperature is low, fog occurs on the inner surface of the windshield and the like, which has a fatal effect on images from cameras, etc. The material has a sandwich structure to reduce the thermal conductivity and prevent the inner surface of the inner glass plate from becoming cloudy. Here, a different material such as a transparent film is sandwiched between the laminated glasses to reduce the thermal conductivity.
Further, in order to reduce the thermal conductivity, the glass plate on the inner side does not come into contact with the atmosphere inside. Therefore, even with such a structure, it is not necessary to hermetically seal the silica gel for several hours in order to use it as in the case of using silica gel.
Further, it is not necessary to apply the anti-fog solvent to the inner surface of the windshield immediately before setting. This eliminates the burden of anti-fog measures and reduces the cost of anti-fog measures.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to an embodiment shown in the drawings. First, the overall structure of the waterproof housing will be described with reference to FIGS. 1 and 2. The waterproof housing has a housing body 10 for housing, for example, an electronic still camera therein. The housing body 10 is composed of a synthetic resin molded body having a wall portion that can withstand water pressure, and an opening on the back side is covered by a back lid 11 so as to be openable and closable. A bracket 12 is attached to a side portion of the housing body 10, and the bracket 12 and the back cover 1 are attached.
The hinge portion 13 of No. 1 is rotatably connected by a hinge pin 14, whereby the back lid 11 is rotatably attached to one side portion of the housing body 10 on the back side.

A plurality of cylindrical holding portions 15 are formed on the back cover 11, and operation buttons 16 are held on these holding portions 15. Each operation button 16 is provided with a spring 17, and an end portion of the spring 17 is received by a spring receiver 18, whereby the operation button 16 is pressed in a direction projecting outward. . Further, the operation button 16 has a pressing member 20 on the tip end portion thereof with the O-ring 19 inserted through the tip end portion thereof.
The pressing member 20 is positioned inside the back cover 11 or the housing body 10.

Therefore, from the outside of the housing 10, the operation button 1
When 6 is pressed, the operation button 16 is pressed inside the housing 10 against the elastic restoring force of the spring 17, and the operation member 20
Is configured to push and operate a predetermined operated portion in an internal device.

A lock member 22 is rotatably attached via a pin 23 to the end portion of the back lid 11 opposite to the hinge portion 13. A hook 24 is provided on the tip side of the lock member 22, and the hook 24 is adapted to be engaged with the locked portion 26 of the bracket 25 of the housing body 10. Further, an O-ring 27 is interposed between the back cover 11 and the housing body 10 to prevent water from entering the housing body 10 when the back cover 11 is closed. There is.

A circular lens barrel 33 is formed on the front side of the housing body 10 and on one side thereof. A transparent glass plate 31 is attached to the window portion of the lens barrel 33, and a shock absorbing rubber ring 30 is attached to the outer peripheral portion. The inside of the circular lens barrel 33 is adapted to receive the optical system of the electronic still camera.

An outer operation knob 35 is provided on the upper side of the housing body 10 and on the other side. This operation knob 35 is, as shown in FIG.
6 is provided, and the operation shaft 36 penetrates a through hole provided in the upper surface of the housing body 10. An O-ring is arranged between the operation shaft 36 and the through hole to ensure a waterproof structure.

A transmission wheel 40 is attached to a portion of the outer operation knob 35 on the tip side of the operation shaft 36. Further, the transmission wheel 40 is provided with protrusions 45 at positions on the outer peripheral side thereof and shifted by 180 ° in the circumferential direction, and these protrusions 45 are provided with rubber engaging members 46. ing.

Next, the structure of the seal at the joint between the opening 69 of the housing body 10 and the back lid 11 in the waterproof housing will be described with reference to FIG. As described above, the O-ring 27 is attached to the back cover 11. That is, a projection 73 is formed on the inner surface of the back cover 11 so as to be continuous with the entire periphery of the back cover 11, and a holding groove 74 is opened laterally on the outer surface of the projection 73. The O-ring 27 is held in the holding groove 74.

On the other hand, on the housing body 10 side, the waterproof packing 70 is attached to the inside of the peripheral portion of the opening 69. A mounting groove 71 is formed inside the opening 69 along the entire circumference thereof, and a waterproof packing 70 is mounted in the mounting groove 71. The inner side surface of the mounting groove 71 is the water blocking wall 7.
The water blocking wall 72 prevents water from entering when the back cover 11 is opened. Further, the water blocking wall 72 regulates the lateral position of the back lid 11 when the back lid 11 is closed. That is, the clearance 76 between the inner side surface of the water blocking wall 72 and the outer side surface of the protrusion 73.
Constitutes the maximum clearance for the lateral movement of the back lid 11, and the position of the back lid 11 is regulated within this range.

As shown in FIG. 2, the electronic still camera 60 housed in the waterproof housing is provided with a plurality of operated parts 61 on the back side thereof, and these operated parts 61 are attached to the back cover 11.
It is adapted to be pressed by the pressing member 20 of the operation button 16 attached above. In addition, electronic still camera 60
The optical system 63 is housed in the circular lens barrel 33 of the housing body 10.

Further, the electronic still camera 60 is provided with a mode switching knob 65 on its upper side and one side. The knob 65 has a knurl 66 on its outer peripheral surface in the axial direction.
Are formed. Therefore, the rotational position of the transmission wheel 40 is preferably adjusted so that the diametrical direction connecting the pair of protrusions 45 provided with the engagement member 46 of the transmission wheel 40 is perpendicular to the insertion direction of the electronic still camera 60. Adjust by When the electronic still camera 60 is gently inserted into the housing body 10 from above in such a state, the mode switching knob 65 of the electronic still camera 60 is attached to the pair of protrusions 45 of the transmission wheel 40. 46, and at this time, the engaging member 4
6 and the knurl 66 of the mode switching knob 65 are engaged with each other.

When the electronic still camera 60 is housed in the waterproof housing in this way, the rear side opening 69 is closed by the back cover 11, and the hook 24 of the lock member 22 is engaged with the latch 26 of the bracket 25. Lock it. As a result, the electronic still camera 60 can be used in the rain or can be photographed underwater. At this time, by pressing the operation button 16 provided on the back cover 11, the operated portion 61 of the electronic still camera 60 can be operated. Alternatively, when the outer operation knob 35 provided on the upper portion of the housing body 10 is rotated, the mode switching knob 65 of the electronic still camera 60 is rotated, and a predetermined mode is selected.

Next, the structure of the transparent window, which is arranged outside the optical system 63 of the electronic still camera 60 housed in the housing body 10 and takes in an optical image from the outside, as shown in FIG.
It will be described with reference to FIG. As shown in FIGS. 4 and 5, the transparent window is composed of an outer glass plate 31 and an inner glass plate 32, which are attached to the front end portion of the lens barrel 33. Note that, as shown in FIGS. 1 and 2, a rubber ring 30 for protection is further provided on the peripheral portion of the outer glass plate 31 on the front end side.
Is to be installed.

A ring-shaped protrusion 80 is formed on the inner peripheral portion of the lens barrel 33 protruding cylindrically on the front side of the housing 10, and an O-ring 81 is attached to a groove portion inside the protrusion 80. The inner glass plate 32 is attached so as to come into pressure contact with the O-ring 81. The glass plate 32 is pressed by the pressing ring 82. The pressing ring 82 is fixed to the front end surface of the lens barrel 33 with screws 83.

Next, the outer glass plate 31 attached in front of the inner glass plate 32 will be described.
The outer glass plate 31 is held by the tubular body 85, and
An O-ring 86 is attached to the back side of the tubular body 85, and a male screw 87 on the back side of the tubular body 86 is fixed to the front end portion of the housing 33 as shown in FIG. It is screwed onto the female screw 88. And the outer glass plate 31
Is held on the inner peripheral surface of the cylindrical body 85 via an O-ring 89. The outer glass plate 31 is fixed on the step portion on the front surface of the cylindrical body 85 by the pressing plate 90.

As described above, in the waterproof housing of this embodiment, the outer glass plate 31 is aluminum die-cast on the outside of the glass plate 32 so that the surface of the glass plate 32 of the lens barrel 33 of the housing body 10 does not become cloudy. Is attached by a glass adapter 85 made of aluminum, and the space between the inner glass plate 32 on the housing body 10 side and the outer glass plate 31 attached by the adapter 85, which is surrounded by the adapter 85, is It is designed to be hermetically sealed. That is, the front and rear glass plates 31, 32
Since the air in the enclosed space between them delays the conduction of heat, the inner surface of the inner glass plate 32 does not fog. The thermal conductivity of air shows a value of about 0.02 kcal / mh ° C.
Outside glass plates 31 and 135 with a value of 4 kcal / mh ° C
It is effective because it is very small for the adapter 85 made of an aluminum alloy cylinder having a value of kcal / mh ° C.

The problem is how to take moisture or humidity in the air layer of the closed space so as not to cloud it. Especially, when the housing body 10 is put in water, the adapter 85 having a high thermal conductivity is used. The temperature first drops, which causes condensation on the inner surface of the adapter 85. Therefore, if a water-absorbent non-woven fabric 91 is attached to the inner surface of the adapter 85, it is absorbed by the non-woven fabric 91. That is, since the humidity in the closed space between the two glass plates 31 and 32 is attracted and condensed by the adapter 85 made of aluminum die casting having a much higher thermal conductivity than glass, the inside of the outer glass plate 31 is exposed. The surface and the outer surface of the inner glass plate 32 are not fogged. The inner surface of the inner glass plate 32 is
Since an air layer between the pair of glass plates 31 and 32 prevents the temperature from decreasing, moisture does not condense on the inner surface of the inner glass plate 32.

Assuming that the outer glass plate 31 has a diameter of 50 mm, a wall thickness of 4 mm, and an average inner diameter of the aluminum die casting is 50 mm, when the thickness of the aluminum die casting 85 is 2 mm, the aluminum die casting adapter 85 is used.
When the length in the axial direction of b is b, the amount of heat conduction is 33b times that of the glass plate 31 by the adapter 85. Therefore, the adapter 85 has a much larger amount of heat conduction than the glass plate 31, and the adapter 85 can sufficiently absorb the moisture in the closed space. Considering the air volume in the closed space and the surface temperature inside the aluminum adapter 85 according to the amount of humidity contained in the air, it becomes possible to easily cope with the fog prevention.

Next, another embodiment will be described with reference to FIG. In this embodiment, the inner glass plate 32 is attached to the outside of the projection 80 of the lens barrel 33 of the waterproof housing 10, and the transparent film 9 is attached to the front side of the inner glass plate 32.
The glass plate 31 on the outside is joined via the metal plate 3. The outer peripheral portion of the outer glass plate 31 is inserted into the inner peripheral surface on the front end side of the lens barrel 33 via an O-ring 89, and is pressed by the pressing plate 90 from the outside. The pressing plate 90 is fixed by screws 94.

The function of the frost prevention by the structure of the transparent window of the housing will be described. In particular, polycarbonate is used as the transparent film 93. Polycarbonate, glass, aluminum,
And the thermal conductivity of air are as follows.

Polycarbonate 0.135 (kcal / mh ° C.) Glass 0.64 Aluminum 135 Air 0.02 Another material 93 is sandwiched between a pair of glass plates 31 and 32 to delay the heat transfer rate. It is preferable to use a material having a low thermal conductivity such as the above polycarbonate. In this sense, it is best if air is sandwiched between the two glasses 31 and 32, but in this case, management of the humidity of the air becomes important. Therefore, for example, cellulose acetate or methyl methacrylic resin having a lower thermal conductivity than polycarbonate is sandwiched between the glass plates 31 and 32 and the thickness of the cellulose acetate is 0.3 to 0.5 mm with respect to the polycarbonate of 4 mm. When combined with a methyl methacrylic resin or the like, it is possible to suppress the thermal conductivity to the same level as the above or lower. Moreover, since the thermal conductivity of the laminated glasses 31 and 32 is substantially equal to or lower than that of the housing 10, the possibility of fogging on the side of the housing 10 having a much larger surface area becomes extremely high.

In the structure of the windshield shown in FIG. 6, the outer glass plate 31 has a large thickness in order to receive static pressure. The outer glass plate 31 is used for waterproofing, and the inner glass plate 32 is prevented from coming into contact with outside air or water.

According to the structure shown in FIG. 6, the inner surface of the outer glass plate 31 and the outer surface of the inner glass plate 32 are bonded to both surfaces of the film 93, and the outer glass is interposed via the film 93. Inner surface of plate 31 and inner glass plate 32
And the outer surface of the are joined together. Therefore, the inner surface of the outer glass plate 31 and the outer surface of the inner glass plate 32 do not come into contact with the atmosphere in the housing body 10. Therefore, the inner surface of the outer glass plate 31 and the outer surface of the inner glass plate 32 are not exposed. Although the inner surface of the inner glass plate 32 comes into contact with the atmosphere in the housing body 10, the transparent film 93 is interposed between the inner glass plate 32 and the outer glass plate 31, thereby achieving a heat insulating structure. Therefore, the temperature of the inner surface of the inner glass plate 32 is less likely to decrease,
This prevents moisture in the atmosphere in the housing from condensing on the inner surface of the inner glass plate 32.

FIG. 7 shows a modification of the structure shown in FIG. Here, the structure of the waterproof packing of the outer glass plate 31 is changed. That is, an inclined surface 96 is formed on the inner peripheral side of the holding plate 90, and the O-ring 89 is attached to the outer peripheral side inclined edge 9 of the glass plate 31 by the inner peripheral side inclined surface 96.
It is designed to be pressed against the portion 7 to achieve a waterproof structure. Even with such a structure, the manner of heat conduction is the same as the structure shown in FIG. 6, so that the inner peripheral surface of the inner glass plate 32 is prevented from being exposed.

[0042]

The main invention of the present application is a waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, the transparent window is composed of a pair of transparent plates,
While making the space between the pair of transparent plates a closed space,
The cylindrical body forming the closed space is made of a material having a higher thermal conductivity than the transparent plate.

Therefore, according to such a waterproof housing, when the waterproof housing is exposed to a low temperature atmosphere, the moisture in the sealed space is condensed on the inner peripheral surface of the cylindrical body made of a material having a high thermal conductivity. This prevents moisture from being condensed on the inner surface of the outer transparent plate. Further, since the inner transparent plate is thermally insulated via the air existing in the closed space, it is possible to prevent moisture from being condensed on the inner surface of the inner transparent plate.

Another main invention of the present application is a waterproof housing in which an optical device is housed inside and a light image is taken in through a glass plate of a transparent window, the transparent window being connected to the front side of the housing. The inner glass plate is attached so as to close the opening of the lens barrel,
The outer glass plate held by the tubular body is detachably attached to the outer side of the inner glass plate, and the tubular body forms a closed space between the outer glass plate and the inner glass plate. It is made of a material having a higher thermal conductivity than the glass plate.

Therefore, according to such a waterproof housing, the inner surface of the inner glass plate that closes the opening of the lens barrel is thermally insulated by the closed space, and the surface of the inner glass plate is prevented from being condensed. When the waterproof housing is exposed to a low-temperature atmosphere, the moisture contained in the air contained in the closed space is condensed on the inner surface of the cylindrical body having a high thermal conductivity. Tying is prevented.

Another main invention of the present application is a waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, the transparent window is composed of two transparent plates, and the transparent window is formed. A material having a lower thermal conductivity than that of the transparent plate is interposed and bonded between the plates.

Therefore, a material having a low thermal conductivity imparts heat insulating properties, prevents a temperature drop on the inner surface of the inner transparent plate, and prevents moisture from condensing on the inner surface. Further, since the outer transparent plate is joined to the inner transparent plate through a material having a low thermal conductivity, the inner surface of the outer transparent plate and the outer surface of the inner transparent plate come into contact with the air inside the housing. No moisture is formed on the inner surface.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a waterproof housing structure.

FIG. 2 is an external perspective view showing the operation of inserting the electronic still camera into the waterproof housing.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a seal structure of a joint portion between a housing and a back cover.

FIG. 4 is an exploded vertical cross-sectional view showing attachment of a glass plate of a transparent window.

FIG. 5 is a vertical cross-sectional view of the assembled state.

FIG. 6 is a vertical cross-sectional view showing the structure of a transparent window according to another embodiment.

FIG. 7 is a vertical cross-sectional view showing a configuration of a transparent window according to a modification.

[Explanation of symbols]

10: housing body, 11: back cover, 12: bracket, 13: hinge part, 14: hinge pin, 15
... Cylindrical holding part, 16 ... Operation button, 17 ... Spring, 18
... Spring receiver, 19 ... O-ring, 20 ... pressing member,
22 ... Lock member, 23 ... Pin, 24 ... Hook,
25: Bracket, 26: Locked part (latch),
27 ... O-ring, 30 ... rubber ring, 31 ... outer glass plate, 32 ... inner glass plate, 33 ... lens barrel,
35 ... Outer operation knob, 36 ... Operation shaft, 40 ... Transmission wheel, 45 ... Projection, 46 ... Engaging member, 60 ... Electronic still camera, 61 ... Operated part, 63 ... Optical System, 6
5: Mode switching knob, 66: Knurled, 69
Opening, 70 Waterproof packing, 71 Mounting groove, 72 Water blocking wall, 73 Projection, 74 Holding groove,
75 ... presser wall, 76 ... clearance, 80 ... protrusion, 81 ... O-ring, 82 ... presser ring, 83 ...
Screws, 85, cylinder, 86, O ring, 87, male thread, 88, female thread, 89, O ring, 90, holding plate, 91, non-woven fabric, 93, transparent film, 94.
Screws, 96 ... Inclined surface, 97 ... Inclined edge

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yukio Yamada             Sony 6-735 Kitashinagawa, Shinagawa-ku, Tokyo             Within the corporation F-term (reference) 2H101 CC01 CC91                 2H105 DD07                 4G061 AA09 AA23 BA12 CA02 CA06                       CB16 CD02 CD24

Claims (12)

[Claims] 1. A waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, wherein the transparent window is composed of a pair of transparent plates, and a space between the pair of transparent plates is a hermetically sealed space. In addition, the waterproof housing is characterized in that the cylindrical body forming the closed space is made of a material having a higher thermal conductivity than the transparent plate. 2. The waterproof housing according to claim 1, wherein the outer surface of the cylindrical body is exposed to the outside and contacts the outside atmosphere. 3. The waterproof housing according to claim 1, wherein the pair of transparent plates are made of glass, and the tubular body is made of metal. 4. The waterproof housing according to claim 1, wherein the tubular body is made of aluminum or an aluminum alloy. 5. A waterproof housing in which an optical device is housed and an optical image is taken in through a glass plate of a transparent window, wherein the transparent window is composed of a lens barrel connected to the front side of the housing. In addition, an inner glass plate is attached so as to close the opening of the lens barrel, an outer glass plate held by a tubular body is detachably attached to the outer side of the inner glass plate, and the outer body is attached by the tubular body. A watertight housing, characterized in that a closed space is formed between the glass plate and the inner glass plate, and the cylindrical body is made of a material having a higher thermal conductivity than the glass plate. 6. The waterproof housing according to claim 5, wherein the tubular body is manufactured by aluminum die casting. 7. The waterproof housing according to claim 5, wherein a water-absorbing member that absorbs condensed water is attached to the inner peripheral surface of the cylindrical body. 8. A waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, wherein the transparent window is composed of two transparent plates, and the transparent plate is provided between the transparent plates. A waterproof housing characterized by having a material having a lower thermal conductivity than that of the above and being joined together. 9. A waterproof housing in which an optical device is housed and an optical image is taken in through a transparent window, wherein an opening of the housing forming the transparent window is provided inside or outside the housing.
A waterproof housing, characterized in that it is hermetically sealed by a single glass plate, and a transparent material having a lower thermal conductivity than the glass plates is interposed between the two glass plates. 10. The waterproof housing according to claim 8, wherein the transparent material having a low thermal conductivity is a transparent resin film. 11. The transparent material having a low thermal conductivity is a polycarbonate film.
Waterproof housing as described in. 12. The waterproof housing according to claim 8, wherein the outer transparent plate or the glass plate is in contact with an external atmosphere and has strength to withstand an atmospheric pressure.