JP2020122884A - Camera housing - Google Patents

Abstract

To provide a camera housing that is free of a movement of a refrigerant even when tilted, and achieves both efficient heat transport and space saving.SOLUTION: The present invention relates to a housing casing that houses an imaging device and is fixed to a universal head device having a tilt function, wherein the imaging device and the housing casing are thermally connected; the housing casing has a channel on at least one or more planes between an outer wall and an inner wall; the sum of an angle made by a normal to the plane and a universal head device optical axis and a maximum elevation angle of the universal head device is less than 90°; and a refrigerant is injected into the channel.SELECTED DRAWING: Figure 4

Description

The present invention relates to a camera housing that houses a camera device and the like, and more particularly to a camera housing having a cooling mechanism.

The camera housing of the tripod head device, which is installed outdoors and takes pictures of the surroundings, becomes extremely hot inside due to heat generated by internal electronic devices and direct sunlight from the outside. Further, in order to further reduce the volume occupied by the tripod head device and to improve wind speed resistance, a more compact camera housing is required. Therefore, a more compact cooling technique has been proposed in which heat inside the camera housing is released to the outside air.

Patent Document 1 discloses that a casing of a communication device is configured to efficiently dissipate heat, a weight of the entire casing is reduced, and a pressure in a channel formed by GAI (gas assist injection molding) changes with temperature. There is disclosed a heat dissipation structure for a communication device housing that can be adjusted according to the above. Patent Document 2 discloses a cooling device of a heating element that enables efficient heat transfer without being restricted by layout.

JP, 2003-60371, A JP 2001-237581 A

However, when the conventional technique disclosed in the above-mentioned patent documents is applied to the pan head device, the refrigerant is biased due to tilting. In particular, in the case of adopting a so-called heat pipe structure in which heat is transferred by phase change of the refrigerant using voids, the deviation of the refrigerant due to tilting becomes more significant, the weight balance is lost, and the operation is affected.

Therefore, an object of the present invention is to provide a camera housing in which the refrigerant does not move significantly even when tilting, so that efficient heat transportation and space saving can both be achieved.

In order to achieve the above object, the camera housing according to the present invention comprises:
A housing housing fixed to a pan head device having a tilt function for housing an imaging device, wherein the imaging device and the housing housing are thermally connected, and the housing housing includes an outer wall and an inner wall. And a channel on at least one plane between them, and the sum of the angle formed by the normal line of the plane and the optical axis of the platform apparatus and the maximum angle of elevation of the platform apparatus is less than 90 degrees. It is characterized in that the refrigerant is injected into.

According to the present invention, it is possible to provide a camera housing in which the refrigerant does not move significantly even when tilting, and it is possible to achieve both efficient heat transport and space saving.

Schematic configuration view of the platform imaging device 1 as viewed from the side Sectional drawing of the imaging device 5 of the camera housing 2 in the optical axis direction. Perspective view of housing housing 102 A sectional view of the camera housing 2 A sectional view of the camera housing 2 of a modification Schematic view from the side of the camera housing 8 B sectional view of the camera housing 8 Angle change conceptual diagram

Hereinafter, modes for carrying out the present invention will be described in detail with reference to the drawings.

Hereinafter, referring to FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5, according to the first embodiment of the present invention, the refrigerant does not move largely even if it is tilted, and efficient heat transport and saving are achieved. A camera housing that enables space compatibility will be described.

FIG. 1 is a schematic configuration diagram of a pan head photographing device 1 according to an embodiment of the present invention as viewed from a side direction.

The platform imaging device 1 includes a camera housing 2, a head 3 and a base 4. The head 3 includes a tilting drive unit that performs tilting when the camera housing 2 rotates with respect to the head 3, and a panning drive unit that performs panning when the head 3 rotates with respect to the base 4. The camera housing 2 is composed of a housing housing 102, a sunshade 108, and a protective glass 6. The imaging device 5 is fixedly housed in the housing casing 102 on the camera base 7, and the camera base 7 is fixed to the housing casing 102. The image pickup device 5 takes an image of the surroundings through the protective glass 6 arranged on the front surface of the housing casing 102. The camera base 7 is formed of a material having excellent heat conductivity, and thermally connects the imaging device 5 and the housing casing 102.

FIG. 2 shows a sectional view of the image pickup device 5 of the camera housing 2 in the optical axis direction. The fin 103 is integrally formed on the upper part of the housing casing 102. An air blower 104 is provided at the rear of the fin 103, and cools the heat generated from the imaging device 5 in the housing casing 102 and transmitted to the fin 103 and the heat of direct sunlight transmitted from the sunshade 108. An air blower 105 is provided to stir the heat inside the housing 102.

A perspective view of the housing 102 is shown in FIG. A plurality of pipes 101 are formed in the wall surface of the housing housing 102. In FIG. 3, the pipe 101 in the wall surface of the housing casing 102 is indicated by a dotted line. The pipe 101 is formed on a plane whose normal is the optical axis, is hermetically sealed, and has a coolant injected therein.

A cross section of the camera housing 2 is shown in FIG. The pipe 101 is formed in a U shape in the wall surface of the housing housing 102. The heat generated by the imaging device 5 is transmitted to the lower portion 101a of the pipe 101 through the camera base 7. When the lower part 101a receives the heat, the internal refrigerant is vaporized by the heat and goes up to the upper part 101b. Since the upper portion 101b is cooled by the fins 103 and the blower 104, the vaporized refrigerant causes a phase change in the liquid and radiates heat. Then, the liquefied refrigerant flows through the wall surface of the pipe 101 and returns to the lower portion 101a. Through the above cycle, heat is transferred by the latent heat of the refrigerant, the pipe 101 functions as a so-called heat pipe, and releases the heat generated in the imaging device 5 to the outside air. Further, the pipe 101 does not have a horizontal surface in the upper part 101b and the lower part 101a, and the end is gently inclined. As a result, the liquefied refrigerant in the upper part 101b flows into the lower part 101a without any stagnation, which prevents the heat transfer efficiency of the heat pipe from decreasing.

Regarding the housing casing 102, by integrally molding the pipe 101 and the fin 103, the heat generated in the imaging device 5 is efficiently transferred to the fin 103 without being subjected to contact thermal resistance, and is released to the outside by the blower device 104. You can Further, since the heat transfer mechanism is incorporated in the wall surface of the housing 102, it is not necessary to configure the platform imaging device 1 with a dedicated heat transfer pipeline, pump, or compressor. As a result, a space-saving and highly efficient heat transfer/heat removal method can be realized, and the degree of freedom in the shape of the housing housing 102 is increased. Since the pipe 101 is formed on a plane having the optical axis as a normal line, the positional relationship between the heat receiving portion and the heat exhausting portion of the pipe 101 does not collapse even when the platform imaging device 1 tilts. With this, it is not necessary to insert a member that causes a capillary phenomenon such as a mesh or a wig into the pipe 101 and distribute the refrigerant to the upper portion of the pipe, so that the number of parts can be reduced. Further, since the refrigerant in the pipe 101 cannot move in the optical axis direction, it is possible to prevent the deviation of the refrigerant due to tilting. As a result, it is possible to prevent the phenomenon that the position of the center of gravity changes during the tilting operation and the phenomenon that the cooling efficiency changes. Because of its light weight and workability, when using a material with poor thermal conductivity for the housing, this method enables a highly flexible thermal design and is also excellent in terms of thermal modification of the material due to its structure. ing.

A modified example of this embodiment is shown in FIG.

In the first embodiment, the pan head imaging device 1 in which the imaging device 5 is put in and out from the side door 106 in FIG. 4 is assumed, but when it is possible to put in and take out the pan head rearward, the pipe 101-2 has an annular shape. However, this effect is not impaired. However, it is necessary that the horizontal surfaces in the upper part and the lower part of the pipe are made small so that the liquefied refrigerant in the upper part of the pipe can flow to the lower part without delay.

Hereinafter, referring to FIG. 6, FIG. 7, and FIG. 8, according to the second embodiment of the present invention, the refrigerant does not largely move even when tilting, and it is possible to achieve both efficient heat transport and space saving. The described camera housing will be described.

The platform imaging device 1 is often used facing downward. Therefore, it is rational to be able to cool downward most efficiently. FIG. 6 is a schematic view of the camera housing 8 which can be cooled downward and can be efficiently cooled. Further, FIG. 7 shows a cross section B of the camera housing 8. Inside the wall surface of the housing case 202, the pipe 201 is arranged in an inclined U shape. As a result, when the camera housing 8 faces downward, the pipe 201 approaches vertically to the ground. As in the first embodiment, the pipe 201 is hermetically sealed, and the refrigerant is injected therein, and functions as a so-called heat pipe that transports heat from the imaging device 5 to the fins 203. When the pipe 201 approaches the vertical direction, the refrigerant that has been cooled to the outside air by the fins 203 and the air blower 204 and returned to the liquid can quickly flow to the lower portion of the pipe 201 due to gravity, and the heat transfer efficiency is improved.

However, when the vertical relationship of the pipe 201 is reversed at the maximum elevation angle of the platform imaging device 1, the conduction efficiency may be reduced and the refrigerant may be biased. A conceptual diagram is shown in FIG. If the plane on which the pipe 201 is formed does not reach 180 degrees or more at the maximum elevation angle of the platform imaging device 1, the positional relationship between the heat reception and the exhaust heat of the pipe 201 is maintained. Therefore, it can be seen from the figure that the sum of the angle C formed by the normal line of the plane on which the pipe 201 is formed and the optical axis and the maximum elevation angle D of the platform imaging device 1 is less than 90 degrees.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist thereof.

1 pan head imaging device, 2 camera housing in Example 1,
3 heads, 4 bases, 5 imaging devices, 6 protective glass, 7 camera stands,
102 housing housing, 108 sunshade, 101 pipe,
103 fins, 104 air blower, 105 air blower, 101a lower part of pipe,
101b pipe upper part, 106 door, 8 camera housing in the second embodiment,
202 housing case, 201 pipe, 203 fin, 204 blower,
101-2 Pipe

Claims (7)

A housing housing fixed to a pan head device having a tilt function for housing an imaging device, wherein the imaging device and the housing housing are thermally connected, and the housing housing includes an outer wall and an inner wall. And a channel on at least one plane between them, the sum of the angle formed by the normal line of the plane and the optical axis of the platform apparatus and the maximum angle of elevation of the platform apparatus is less than 90 degrees, and the channel A camera housing characterized in that a refrigerant is injected into the camera housing. A housing housing fixed to a pan head device having a tilt function for housing an imaging device, wherein the imaging device and the housing housing are thermally connected, and the housing housing includes an outer wall and an inner wall. A camera housing, characterized in that channels are respectively formed on at least one plane having a normal line to the optical axis, and a coolant is injected into the channels. The camera housing according to claim 1 or 2, wherein a radiation fin is integrally molded with the housing casing. The camera housing according to claim 1 or 2, wherein the channel has a shape in which the coolant collects in the bottom surface direction of the housing, and has a pipe shape. The camera housing according to claim 1, wherein the channel has a bent portion of 90 degrees or more inside the housing casing with respect to a gravity direction. The camera housing according to claim 1, wherein the channel has a ring shape. The camera housing according to any one of claims 1, 2, 4, 5, and 6, wherein the channel is mounted with one that causes a capillary phenomenon.