Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
  • H04N23/50—Constructional details
  • H04N23/51—Housings
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
  • G03B17/00—Details of cameras or camera bodies; Accessories therefor
  • G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B08—CLEANING
  • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
  • B08B17/00—Methods preventing fouling
  • B08B17/02—Preventing deposition of fouling or of dust
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
  • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
  • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
  • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
  • G08B13/19617—Surveillance camera constructional details
  • G08B13/19619—Details of casing
• • G—PHYSICS
  • G08—SIGNALLING
  • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
  • G08B13/00—Burglar, theft or intruder alarms
  • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
  • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
  • G08B13/194—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
  • G08B13/196—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
  • G08B13/19617—Surveillance camera constructional details
  • G08B13/19632—Camera support structures, e.g. attachment means, poles

Definitions

• the present invention relates to the field of cases for surveillance video cameras according to the preamble of claim 1.
• WO2010030558 is composed of two metal half-shells that can be closed, the video camera being arranged therein, on a pivoting plastic support.
• the heating elements are housed near the electronic board, therefore contributing to heat it in an undesired manner.
• the transparent panel is not optimally heated, especially when the temperature outside the case is very low (for example think of when the case is mounted outside during the winter season), resulting in the risk of misting the transparent panel up and of a relevant reduction in the functionality of the whole surveillance system.
• the object of the present invention is to overcome the drawbacks of the prior art.
• the object of the present invention is to provide a case for surveillance video cameras wherein the transparent panel can be optimally heated without the need of necessarily increasing the power of the heating elements and the relevant consumption.
• the idea at the base of the present invention is to provide a case for surveillance video cameras housing a holding device for the video camera defining the surrounding walls made of plastic material of at least one section of a duct conveying an air flow directed towards a transparent panel, a part of the case, and placed in front of the video camera.
• the air is conveyed on the heating means, for example heating elements, and it remains well isolated, such that even a low external temperature does not cause the temperature of the air flow to decrease, with advantages for the overall performance of the system.
• the heating means besides heating by convection the air flow directed to the transparent panel, they heat by conduction also a metal plate placed directly in contact with the body of the video camera, such to keep it warm when necessary.
• Another object of the invention is also a holding device for the functional components of a video camera (e.g. electronic board, fans, heating elements, etc.) intended to be easily mounted in a case, thus allowing old video surveillance systems to be easily upgraded.
• a video camera e.g. electronic board, fans, heating elements, etc.
• the holding device comprises a body comprising linking means for supporting a video camera in different relative positions with respect to the body, air flow generating means (7), and at least one electric circuit for powering and/ or controlling the air flow generating means.
• the body of the device comprises a housing for the air flow generating means and a housing for the electric circuit.
• the body comprises a first and second part connectable to each other, and such that, once coupled, define at least one section of a conveying duct for an air flow.
• the duct is defined by surrounding walls made of insulating material, preferably plastic material, and extending between a first and a second end. The first end opens on the housing for the air flow generating means, while the second end faces an end of the body opposite to the position of the housing on the body itself.
• a video camera holding device which is efficacious in demisting a case and at the same time it is such to allow a simple and rapid assembly within a case for video cameras, since it is sufficient to insert the holding device into the case and secure it thereto, for example by screws or even better by means of snap couplings, such to have immediately available all the housings necessary for the video camera, for the functional components and the ducts for diffusing the warm air towards the transparent panel.
• Figure 1 is a perspective view of a case according to the invention in the opened condition, with a video camera housed therein;
• Figure 2 is a front view of the previous figure
• Figure 3 is an exploded view of the case of the previous figures
• Figure 4 is an exploded view of a detail of the case of the previous figures.
• the case 1 comprises a first 3 and a second 4 half-shell connectable to each other to define a volume housing at least one videocamera 2.
• the two half -shells 3 and 4 are hinged to each other such to be easily connected or disconnected.
• the two half-shells are preferably (but not necessarily) made of metal, for example aluminum or a preferred metal alloy and particularly at least one of them (in this example the upper half-shell 3) comprises a transparent panel 5 intended to be placed in front of the lens of the video camera such to allow it to inspect an environment to be monitored.
• the case 1 further comprises air flow generating means 7, which, in the shown example, comprise an electric fan which takes air from one side and blows it to the opposite side.
• the case 1 comprises also heating means 6 intended to raise the temperature of the air flow generated by the fan 7; in the example the heating means 6 comprise one or more heating elements arranged on a common support board (e.g. a PCB, "printed circuit board”), such to be put in a convective heat exchange condition with the air fed to the conveying duct 8 by the fan 7 and which is finally directed towards the transparent panel 5 in order to heat it and thus to prevent it from being misted up when outside of the case 1 there is a low temperature.
• a common support board e.g. a PCB, "printed circuit board
• the conveying duct 8 comprises at least one section or trunk which is characterized in that it is delimited by surrounding walls completely made of plastic material, such to isolate the air flow directed to the transparent panel and such to avoid its temperature to drop.
• the case 1 comprises a holding device 9 for the video camera 2 which is fixed to one of the two half-shells, in this example to the lower half- shell 4.
• the holding device 9 defines the surrounding walls made of plastic material of the section of the conveying duct 8.
• the holding device 9 comprises a first 91 and a second 92 body part connectable to each other in a box-like manner.
• the two parts 91 and 92 together, in the coupled condition, in this example define a first housing 93 for an electronic unit 10 controlling the video camera 2.
• the electronic unit is intended both to process the video data and to treat power, which is distributed by it to the different apparatuses (video camera, fans, heating elements etc.) inside the case 1.
• the two parts 91 and 92 in the coupled condition, define also a second housing 94 for the air flow generating means 7, that is in this example for the fan.
• the housing 94 for the air flow generating means 7 is close to the first housing 93 for an electronic unit 10 and it is in fluid communication therewith, for example by suitable openings.
• the section or trunk of the conveying duct 8 defined by the surrounding walls made of plastic material is formed by the coupling between the two parts 91 and 92 (in the coupled condition).
• the holding device 9 comprises also a fixing seat 95 for the heating means 6, that is for the board supporting the heating elements in this example.
• Such seat is advantageously made on the first body part 91 near one of the surrounding walls of the conveying duct 8, such to allow the air flow passing in the duct 8 to be heated.
• it extends substantially between the housing 94 (where it has a first opening) and an enlarged opening 81 arranged close to the transparent panel 5, such to feed the warm air flow as closest as possible thereto, maximizing the demisting effect and reducing losses of heat.
• the enlarged opening 81 of the conveying duct 8 comprises diffusion flaps 82 arranged inside the duct 8 for distributing the air flow uniformly on the transparent panel 5.
• the first body part 91 at the enlarged opening 81 comprises a diffusion flap 83 which is tilted with respect to the transparent panel 5.
• the holding device 9 comprises a fixing plate 96 for the video camera 2.
• Such plate 96 is advantageously provided with at least one slotted hole 97 for being coupled in an adjustable way with a positioning means 11 of the video camera 2; in the example shown the positioning means 11 is a simple screw with a washer that allows the position of the video camera 2 to be adjusted and fixed in the case 1 depending on the dimensions or on the type; it has to be considered that the same case 1 can house different types of video cameras, depending on needs.
• the plate 96 with the slot 97 actually constitute a slide upon which the video camera can slide in the installation phase.
• the fixing plate 96 comprises a metal body, preferably it is entirely made of metal material, for example aluminum or a special alloy, and it is placed in contact with or in the immediate vicinity to the heating means 6 for the air flow.
• This arrangement allows an efficient heat exchange (by contact or by conduction) to be provided between the heating means 6 and the plate 96.
• the heat generated by the heating means 6, arranged in the front part of the case, is thus transferred on the whole surface of the plate 96, it being made of metal, that is a good heat conductor. Since the video camera 2 is fixed on the plate, this choice allows the video camera to be efficiently heated.
• the lower half-shell 4 has two openings with breakable baffles 20 which open when positioning the case 1 in its operating condition and which allow a certain air exchange with the outside.
• the heated air taken from the surroundings of the electronic unit 10 is conveyed into the duct 8 which avoids losses of heat by the fact that its walls are made of insulating material, such as for example plastic, a bad heat conductor.
• the air flow comes in contact with the heating elements 6, arranged in a portion of the duct placed under the plate upon which the video camera is fixed and its temperature raises.
• a desired value obtained by adjusting the power absorbed by the heating elements and by controlling the temperature by means of a sensor, e.g. a thermistor such as a PTC (Positive Temperature Coefficient).
• the air flow heated in this manner therefore comes to the opening 81 from where, thanks to the flaps 82 and 83, it is uniformly directed on the transparent panel 5, for demisting it by moisture evaporation.
• the air goes on in its path in the volume of the case, towards the rear thereof, and then it is again recovered by the fan 7 and the cycle is repeated.
• the temperature of the video camera 2 is kept at a suitable and preferred value by the fact that the plate 96 is heated due to the conduction with heating elements 6.
• the person skilled in the art can appreciate how the assembly shown in figure 4 is a holding device 9 for a surveillance video camera 2 that can be used into different types of protection cases 1.
• Such a device comprises a body comprising linking means for supporting a video camera in different relative positions with respect to the body, air flow generating means 7, and at least one electric circuit for powering and/ or controlling the air flow generating means.
• the body of the device comprises a housing 94 for the air flow generating means and a housing for the electric circuit.
• the body comprises a first 91 and second 92 parts connectable to each other and such that, once coupled, define at least one section of a conveying duct 8 for an air flow.
• the duct is defined by surrounding walls made of insulating material, preferably plastic material, and extending between a first and a second end; the first end opens on the housing 94 for the air flow generating means 7, while the second end faces an end of the body opposite to the position of the housing 94 on the body itself.
• the holding device 9 further comprises heating means 6 and a seat 95 for fixing the heating means 6.
• Such fixing seat 95 is made on the first body part 91 at one of said surrounding walls of the conveying duct 8.
• the seat particularly, is placed in a position near the second end, such that it heats the air near the outlet from the duct.
• the holding device 9 preferably comprises a metal fixing plate 96 provided with a slotted hole 97 intended to receive a positioning means 11 of a video camera 2.
• the fixing plate is mounted at least partially above or in contact with the heating means 6, such that an air flow generated by the air flow generating means 7, flowing through the heating means comes in contact with the fixing plate.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Aviation & Aerospace Engineering (AREA)
• Multimedia (AREA)
• Signal Processing (AREA)
• Studio Devices (AREA)
• Accessories Of Cameras (AREA)
• Packages (AREA)

Priority Applications (18)

Applications Claiming Priority (2)

Publications (1)

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ID=47046699

Family Applications (1)

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Cited By (2)

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Citations (4)

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• 2012
  • 2012-09-24 IT IT001589A patent/ITMI20121589A1/it unknown
• 2013
  • 2013-09-12 KR KR1020157007487A patent/KR102020701B1/ko active Active
  • 2013-09-12 JP JP2015532547A patent/JP6208242B2/ja not_active Expired - Fee Related
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  • 2013-09-12 RS RS20160636A patent/RS54996B1/sr unknown
  • 2013-09-12 HU HUE13801726A patent/HUE029270T2/en unknown
  • 2013-09-12 WO PCT/IB2013/058504 patent/WO2014045170A1/en not_active Ceased
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  • 2013-09-12 US US14/430,830 patent/US9392149B2/en active Active
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• 2015
  • 2015-03-18 IL IL237805A patent/IL237805B/en active IP Right Grant
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