JP6419598B2 - Camera device and method for preventing condensation of camera device - Google Patents

Description

  The present invention relates to a camera device that is used by housing a camera body in a camera case having a windshield.

Currently, camera devices are used in various fields such as imaging broadcast materials and imaging roads and railways for monitoring. Such a camera device, particularly when used outdoors, may cause dew condensation due to a temperature difference or the like on the windshield of the camera case housing the camera body, which may affect imaging quality.
As a countermeasure against such problems, a method of preventing the condensation by directly increasing the surface temperature of the windshield itself by providing an electrode and a conductive film on the windshield, or providing a fan near the windshield to circulate the air. Thus, measures such as a method for preventing the windshield from condensing are taken. (Patent Document 1)

As another conventional method, an example of an external view of the camera device in the prior art of FIG. 7, an example of a cross-sectional view of the camera device in the prior art of FIG. 8 (A-A cross-sectional view in FIG. 7A), A description will be given using an example of a cross-sectional view of the camera device in the related art of FIG. 9 (cross-sectional view along BB in FIG. 7A).
In FIG. 7, a front view (A) of the camera device 201 is shown on the left side. On the right side, a perspective view (B) in which the camera device 201 is mounted on a pan head 202 or the like is shown, and the camera device 201 is installed in a place where imaging is necessary. 8 is a cross-sectional view taken along line AA in FIG. 7A, and FIG. 9 is a cross-sectional view taken along line BB in FIG.
The camera device 201 includes a camera case 203 having an upper surface cover 204 and the like as necessary.
The camera case 203 is provided with a windshield 205 at the front, and a back fan 206 for circulating the air inside the camera case inside the back. The flow path of the rear fan 206 is, for example, as indicated by an arrow 220 in the drawing. This effectively transfers the heat of the air in the camera case 203 to the camera case 203 and prevents condensation that occurs due to the stagnation of air in the corner 230 of the camera case that is difficult to transfer heat and is susceptible to the outside air temperature. be able to.
In addition, a camera body 211 is provided inside the camera case 203. For example, in the case of a three-plate camera for the purpose of high resolution, an image is displayed in red, green, and red via a camera lens 214 and a prism 212. A high-resolution image is acquired by decomposing the light into three light beams of blue, and acquiring the respective light beams by the three image pickup devices 213 and then combining them. Here, a description of the video acquisition method is omitted.
When the temperature inside the camera body 211 rises, the camera body fan 207 cools the prism 212 and the image sensor 213 that are easily affected by heat. The flow path of the camera body fan 207 in this case is, for example, as indicated by an arrow 221 in the figure.

JP 2003-198899 A

In recent years, the camera body is often required to be cooled with further enhancement of functionality. In such a case, a fan for preventing condensation as a camera device is required together with the cooling fan for the camera body as described above. There is a case. However, it is necessary to reduce the size of the camera device. In such a case, providing two fans affects the size reduction of the camera device. In addition, when two fans are provided, the convection must be taken into consideration, which makes layout design and air volume design difficult. In addition, the provision of two fans may cause an increase in vibration due to the fan, which may affect the imaging quality.
SUMMARY OF THE INVENTION An object of the present invention is to realize a miniaturization of a camera apparatus having a cooling fan in a camera body, which also prevents condensation of the camera apparatus.

  The camera device of the present invention is a camera device that includes a camera body with a built-in image sensor and a camera case having a windshield, and stores the camera body in the camera case and images a target object through the windshield. A camera body fan provided so as to exhaust heat generated by the image sensor from the camera body, and a rectifying plate that guides heat exhausted from the camera body fan to the windshield.

  The camera device of the present invention is further characterized in that a camera body fan is provided in the camera body.

  The camera device of the present invention is further characterized in that a current plate is provided so as to protrude from the camera body.

  Further, the camera device of the present invention is characterized in that the rectifying plate is opened so as to exhaust the exhaust from the camera body fan to only one side in the windshield direction.

  The dew condensation prevention method for a camera device according to the present invention includes a camera body having a built-in image sensor and a camera case having a windshield. Is a method of preventing dew condensation of a camera device that images the heat generated by the image pickup device by exhausting heat from the camera body by a fan and guiding the exhaust heat from the fan to the windshield by a current plate.

  According to the present invention, in a camera device provided with a cooling fan in the camera body, the camera device can be reduced in size while also preventing condensation.

It is the figure which showed one Example of the external view of the camera apparatus in this invention. It is the figure which showed one Example of sectional drawing (AA sectional drawing of FIG. 1 (A)) of the camera apparatus in this invention. It is the figure which showed one Example of sectional drawing (BB sectional drawing of FIG. 1 (A)) of the camera apparatus in this invention. It is the figure which showed one Example of the exploded view of the camera apparatus in this invention. It is the figure which showed one Example of sectional drawing of the camera main body of the camera apparatus in this invention. It is the figure which showed one Example of the unit of the camera main body fan and baffle plate attached to the camera main body in this invention. It is the figure which showed an example of the external view of the camera apparatus in a prior art. It is the figure which showed an example of sectional drawing (AA sectional drawing of FIG. 7 (A)) of the camera apparatus in a prior art. It is the figure which showed an example of sectional drawing (BB sectional drawing of FIG. 7 (A)) of the camera apparatus in a prior art.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 6.

Example 1
FIG. 1 is a diagram showing an embodiment of an external view of a camera device according to the present invention.
FIG. 1 shows a front view (A) of a camera device 101 having a front glass 105 on the left side on the left side. A perspective view (B) in which the camera device 101 is mounted on the camera platform 102 or the like is shown on the right side, and is installed in a place where imaging is necessary.

2 and 3 are respectively an example of a cross-sectional view of the camera device according to the present invention (A-A cross-sectional view of FIG. 1A) and a cross-sectional view of the camera device of the present invention (FIG. 1A). It is the figure which showed one Example of BB sectional drawing.
The camera apparatus 101 is provided with a camera case 203 having an upper surface cover 104 and the like that also has a bag as necessary.
The camera case 103 is provided with a windshield 105 on the front, and a camera body 111 is provided inside. For example, in the case of a three-panel camera for high resolution, the camera case 103 is attached to the tip. The camera lens 114 and the prism 112 inside the camera body 111 are used to decompose the image into three lights of red, green, and blue, and the respective lights are acquired by the three image sensors 113 and then combined to obtain a high level. The resolution video is acquired. Here, a description of the video acquisition method is omitted.
Then, considering the case where the inside of the camera body 111 is heated, the prism 112 and the image sensor 113 that are easily affected by heat are cooled by the camera body fan 107. In this case, the flow path of the camera body fan 107 circulates, for example, as indicated by an arrow 121 in the figure, and in order to efficiently circulate the air inside the windshield 105, A rectifying plate 116 is provided. As a result, the exhaust air that has cooled the interior of the camera body 111 hits the rectifying plate 116 and changes the direction of the wind toward the windshield 105. Will circulate. Further, since the exhausted heat circulates efficiently inside the camera case 103, the exhausted heat is transmitted to the camera case 103, and is exhausted as a camera device.

FIG. 4 is an exploded view of an embodiment of the camera device according to the present invention.
The camera case 103 is stored in a state where the camera body fan 107 and the current plate 116 are attached to the camera body 111 with screws 118 and the camera lens 114 is further provided, and the camera case 103 is closed by the back cover 106. In the upper left of the drawing, a perspective view from the opposite side of the camera body 111 with the camera lens 114 provided is shown.
In the description of FIG. 3 described above, the air circulation in the camera apparatus 101 has been described. Here, the air circulation in the camera body 111 will be described in particular.
Air in the camera case 103 is taken in from an air inlet 122 provided on the side surface of the camera body 111, and the inside (the prism 112 and the image sensor 113 shown in FIGS. 2, 3 and 5) is cooled. The cooled air is discharged from the camera body 111 by the camera body fan 107 through the opening 124, and is further discharged toward the windshield 105 from the exhaust port 123 opened by the baffle plate through the camera body fan 107. The air flow path at this time is indicated by arrows.
The rectifying plate 116 is provided with an exhaust port 123 only in one direction so as not to flow in directions other than the direction of the windshield 105. Further, as a characteristic of the air flow, there is a property that if the opening area through which the wind passes is narrowed, the air flow rate becomes faster. Therefore, the exhaust port 123 of the rectifying plate 116 protrudes from the camera body 111 and the opening of the exhaust port 123 is opened. By reducing the area and increasing the flow rate of the exhaust air after cooling the inside of the camera body 111, it is possible to have a structure in which air is circulated with a minimum air volume.

  2 to 4, the air discharged from the rectifying plate 116 passes through the gap between the camera case 103 and the camera lens 114, passes through the inner surface of the windshield 105, and the opposite camera case 103. The air flows through the gap between the camera lens 114 and the intake port 122.

FIGS. 5 and 6 are views showing an embodiment of a cross-sectional view of the camera body of the camera device according to the present invention and an embodiment of the camera body fan and rectifying plate unit attached to the camera body according to the present invention. is there.
5A is a perspective view of the camera body 111 provided with the camera lens 114, and is a cross-sectional view of the square portion described here. The figure is the right figure (B).
Here, the arrangement and mounting method of the camera body fan 107 and the current plate 116 with respect to the camera body 111 will be described in detail.
As shown in FIG. 5B of the embodiment of the cross section of the camera body of the camera apparatus of the present invention in FIG. 5, a camera body fan 107 is disposed inside the camera body 111 and protrudes outside the camera body 111. The rectifying plate 116 is disposed in such a manner. Here, the camera body fan 107 and the current plate 116 are configured as one unit, and the unit is attached to the camera body 111.
Next, the above-described unit will be described with reference to an embodiment of the camera body fan and rectifying plate unit attached to the camera body of the present invention in FIG.
The camera body fan 107 is fixed to the current plate 116 via a spacer 117 using a screw 119. Thereby, the current plate 116 and the camera body fan 107 are unitized. The camera body fan 107 has a connector 120 for supplying power for driving. Although not particularly shown, the camera body fan 107 is supplied with power from the camera body 111. When the fan unit is attached to the camera body 111, the connector 120 is inserted into the connector of the camera body, and then attached to the camera body 111 with screws 118 as shown in FIG. That is, the fan unit can be easily replaced by the attachment / detachment of the screw 118.
The height of the spacer 117 in the fan unit can be adjusted as appropriate depending on the positional relationship between the prism 112 and the image sensor 113 inside the camera body 111. Further, the flow regulating plate 116 can also appropriately adjust the area of the exhaust port 123 by adjusting the bending height. Thereby, the influence of the air volume and vibration on the prism 112 and the image sensor 113 can be taken into account, and the flow velocity of the exhaust from the exhaust port 123 can be adjusted.

  According to the present invention, the cooling of the camera body and the circulation of the air inside the camera case can be realized simultaneously by a single fan, and therefore the external dimensions of the camera device can be minimized. Further, if only one fan is provided, the failure rate is reduced as compared with the case where there are a plurality of fans, the number of maintenance parts is reduced, and the fan replacement operation is facilitated. Furthermore, by reducing the number of fans, vibrations caused by the fans can be reduced, and the noise of the camera device can be reduced, as well as the influence of vibration noise in imaging.

(Example 2)
In the first embodiment, the camera body fan 107 is provided so as to exhaust air from the inside of the camera body 111, and the rectifying plate 116 is provided on the exhaust side of the camera body fan 107. The camera body fan 107 is provided so as to suck in air from the outside of the camera body 111 and is exhausted from the opening 124 on the opposite side to which the camera body fan is attached, and only the current plate 116 is provided in the opening 124 to be exhausted. May be provided. Thereby, the same effect can be acquired.
Further, based on the present embodiment, a rectifying plate 116 may be provided on the intake side of the camera body fan so as to be able to intake air from the windshield 105 side. Thereby, both the intake air of the camera body fan and the exhaust air from the camera body are rectified in the same direction, so that the internal air can be circulated more effectively.

  Although the embodiments of the present invention have been described in detail above, it is needless to say that the present invention is not limited to the camera devices described herein and can be widely applied to camera devices other than those described above.

  101: camera device, 102: pan head, 103: camera case, 104: top cover, 105: windshield, 106: back cover, 107: camera body fan, 111: camera body, 112: prism, 113: imaging device, 114: Camera lens, 116 current plate, 117: Spacer, 118, 119: Screw, 120... Connector, 121: Camera body fan flow path, 122: Inlet, 123: Exhaust, 124: Opening, 130: Corner of camera case, 201: camera device, 202: pan head, 203: camera case, 204: top cover, 205: windshield, 206: rear fan, 207: fan on camera body, 211: camera body, 212: prism, 213: Image sensor, 214: Camera lens, 220: Rear fan flow path, 221: Camera Body fan duct, 230: camera case corners

Claims (5)

A camera device including an image sensor and a camera case having a windshield, wherein the camera body is housed in the camera case and images a target object through the windshield,
An intake port is provided on a side surface of the camera body, and is provided at an opening at a position facing the intake port so that heat generated by the imaging device is exhausted from the camera body by air taken in from the intake port . Camera body fan,
A rectifying plate that guides exhaust heat from the camera body fan in only one direction of the windshield;
A camera device comprising: The camera device according to claim 1,
A camera apparatus, wherein the camera body fan is provided in the camera body. The camera device according to claim 1, wherein:
A camera device, wherein the current plate is provided so as to protrude from a camera body. It is a camera apparatus of Claim 1 thru | or 3, Comprising:
The rectifying plate can be adjusted in bending height, and the adjustment enables adjustment of the area of the exhaust port from the camera body fan. An anti-condensation method for a camera device, comprising: a camera body having a built-in image sensor; and a camera case having a windshield, wherein the camera body is housed in the camera case and an object is imaged through the windshield. There,
Intake air that exhausts heat generated by the image sensor from the air inlet provided on the side of the camera body,
The heat generated by the imaging device to discharge heat from the camera body by a fan provided in an opening of a position facing the intake port,
A method for preventing dew condensation of a camera device, characterized in that exhaust heat from the fan is guided by a baffle plate in only one direction of the windshield.

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