WO2011083623A1

WO2011083623A1 - Platform integrated camera

Info

Publication number: WO2011083623A1
Application number: PCT/JP2010/069946
Authority: WO
Inventors: 嘉孝蓮見
Original assignee: 株式会社日立国際電気
Priority date: 2010-01-07
Filing date: 2010-11-09
Publication date: 2011-07-14
Also published as: JP2011141414A; JP5178749B2

Abstract

Filth attached to a front glass is reduced. The air blown from a heat releasing fan, which is built into a camera, is guided so as to blow onto the front glass. Specifically, disclosed is a platform integrated camera which is provided with: a body having a case, which has a hermetically sealed structure and which stores a pan axis/tilt axis driving means, and an outer case which covers the outside of the aforementioned case; a camera unit which is supported in a rotatable manner by the body on the tilt axis; and a base which supports the body along the pan axis. The platform integrated camera is characterized by also being provided with: a fan which generates airflow for cooling the case in a space between the case and the outer case; and an air guiding means for blowing at least a portion of the aforementioned airflow onto the front glass of the camera unit.

Description

Pan head integrated camera

The present invention relates to a pan / tilt head-integrated camera that is composed of an electric pan head and a TV camera and is used outdoors.

Conventionally, an outdoor pan / tilt head integrated camera is known (for example, see Patent Document 1).
FIG. 8 is an external view of a conventional pan / tilt head integrated camera. 8A is a view of the camera platform integrated camera viewed from the front surface, FIG. 8B is a view of the camera platform integrated camera viewed from the side, and FIG. 8C is an enlarged view of the windshield of FIG. 8A. Reference numeral 801 denotes a camera unit, 802 a body, 803 a base, 804 a windshield, and 805 a wiper. This pan / tilt head-integrated camera is for outdoor surveillance photography, and a windshield 804 provided in front of the camera unit 801 for taking in imaging light is defrosted glass that can be heated by a heater. In addition, an electric wiper 804 that wipes off rain and the like attached to the outside of the windshield 804 is provided. Furthermore, there is a thing provided with the washer (not shown) which injects washing water toward windshield 804.

In addition, as a technique related to the present invention, there is known an environment-resistant camera housing provided with a cooling device for dissipating heat inside the main body, heat absorption and heat radiation fins, etc., in a supply path of purge air blown to the window member. (For example, refer to Patent Document 2).
There is also known an air purge hood that is attached to the front surface of a camera case and prevents the entry of dust and the like by filling the front surface with separately supplied compressed air (see, for example, Patent Document 3).

Design Registration No. 1348897 JP-A-9-203950 JP 2001-108880 A

With conventional pan / tilt head-integrated cameras, especially when the windshield defroster is activated, the dirt attached to the windshield will dry out and harden. There was a problem. For example, in places where waves are splashed, such as near the coast, the visibility is significantly deteriorated due to the fixation of salt.
Although there is a method of applying washing water with a washer, the amount of use is limited because water stored in a tank in advance is used. Moreover, it cannot be used easily in an environment where it is expected that the wash water will scatter and pass on to passersby. For this reason, there was no other way for the worker to go to the installation location of the pan head integrated camera and clean it manually with a towel or the like.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a pan head integrated camera capable of reducing the adhesion of dirt to a windshield at a low cost.

In order to achieve the above-mentioned object, the present invention provides a body having a sealed structure housing panning and tilting axis driving means, an outer case covering the outside of the casing, and a tilt axis of the body. In a pan / tilt head-integrated camera comprising a camera unit rotatably supported by a base and a base that supports the pan axis of the body, the housing is disposed in a space between the housing and the outer case. The apparatus further includes a fan that generates an air-cooling airflow, and an air guide unit that injects at least a part of the airflow onto the windshield of the camera unit.

In the above configuration, the windshield further includes a defroster, and the casing has a two-piece structure made of die-casting, and fixes the driving means for the pan axis and the tilt axis in one piece. The fan is operated simultaneously with the defroster.

In the above configuration, the camera unit further includes a camera case having the windshield on the front surface and sealingly storing the camera body, a camera cover covering the upper surface of the camera case, the camera case, and the camera cover Constitutes a part of the air guide means.

According to the pan / tilt head integrated camera of the present invention, since the airflow generated for air-cooling the pan / tilt head part is blown toward the windshield of the camera part, the adhesion of dirt to the windshield is reduced. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram schematically illustrating a camera platform integrated camera according to an embodiment. 1 is an exploded perspective view of a pan / tilt head integrated camera according to Embodiment 1. FIG. FIG. 3 is a left side view of the camera platform integrated camera according to the first embodiment. FIG. 4 is a cross-sectional view of the camera platform integrated camera taken along line AA shown in FIG. 3. FIG. 3 is an upper cross-sectional view of the pan / tilt head integrated camera according to the first embodiment. FIG. 6 is a front view schematically illustrating a pan / tilt head integrated camera according to a second embodiment. FIG. 9 is a left side view schematically illustrating a camera platform integrated camera according to a second embodiment. FIG. 6 is a cross-sectional view of a pan / tilt head integrated camera according to Embodiment 3; The figure which looked at the conventional pan head integrated camera from the front. The figure which looked at the conventional pan head integrated camera from the side. The enlarged view of the windshield of the conventional pan head integrated camera.

FIG. 1 is a diagram schematically illustrating an embodiment of the present invention. The pan / tilt head integrated camera according to this embodiment includes a camera unit 1, a body 2, and a base 3.
The camera unit 1 is a camera body 11, a lens 12, and a video signal circuit board 13 (all not shown) that are housed in a camera case 14 (see FIG. 5 described later) in a substantially sealed manner. The camera case 14 is a box-shaped container, and includes a front glass 15 made of a transparent glass plate that takes in imaging light and an electric wiper 16 that wipes the outside of the front glass 15 on the front surface. A resistance wire (defroster) 18 is formed on the inner surface of the windshield 15 by vapor deposition.

The body 2 is a part that realizes a function as an electric pan head. The camera unit 1 is pivotally supported by a tilt axis in the vicinity of the center of the left side surface (so-called cantilever type). It is supported by. The body 2 has two driving means 21 and 22 including stepping motors and gears for independently rotating a tilt axis and a pan axis orthogonal thereto, and a power source for supplying power to the camera unit 1 and the body 2 itself. The circuit 23 includes an outer case 24 that forms the outer shape of the body 2, and a blower fan 25 that generates an airflow for cooling the driving means 21 and 22 and the power supply circuit 23 (see FIG. 2 described later). The outer case 24 has a rounded and rounded box shape, and includes slit-like air holes 26 in the vicinity of four corners where the front surface, the back surface, the top surface, and the bottom surface are in contact, and the blower fan 25 has at least a front upper air hole. It operates so that air is exhausted from 26.

The base 3 is a box-shaped pedestal having bolt mounting holes at the four corners of the bottom, and the body 2 is pivotally supported by the pan shaft, and the video signal and power source taken out through the pan shaft are connected to the rear terminal. Stores wiring, terminal blocks, safety circuits, etc.

1 is basically attached to the surface of the windshield 15 by generating airflow (air blow: arrow 111) on the surface of the windshield 15 from the air vent 26 on the upper front side of the body 2. Water droplets such as splashed seawater are quickly eliminated (dropped off). It is desirable that the airflow generated near the surface of the windshield 15 is an airflow (laminar flow) having a stable direction and strength and close to the downward direction. For example, the arrangement and shape of the air holes 26 are selected so that the direction of ejection from the air holes 26 on the upper side of the front side is almost right side, or a nozzle-like structure is provided in the body 2 (outer case 24).

FIG. 2 is an exploded perspective view of the pan / tilt head integrated camera according to the first embodiment. FIG. 3 is a left side view of the camera platform integrated camera. FIG. 4 is a cross-sectional view of the pan / tilt head integrated camera, with the cross section taken along the line AA shown in FIG. 3 viewed from the arrow (front side) except for the camera portion. FIG. 5 is a cross-sectional view of the camera platform integrated camera as viewed from above. In the configuration of the pan / tilt head integrated camera of this example, the same reference numerals are given to the constituent elements substantially corresponding to the previous embodiment for the sake of convenience, and redundant description is omitted. In the description of this example, when a direction is expressed, the reference is made with respect to any member in which the imaging direction of the camera in FIG.

The camera platform integrated camera of this example is installed outdoors or in an environment similar to the outdoors. Therefore, a casing 27 having a sealed structure for waterproofing is provided inside the outer case 24 constituting the outer shape of the body 2, and the driving means 21 and 22, the power supply circuit 23 and the like are all housed in the casing 27. .
The casing 27 includes an aluminum die-cast casing box 27a and a casing lid 27b that are divided in the left-right direction of the pan / tilt head integrated camera. A driving unit 21 that rotates the camera unit 1 in the tilt (up and down) direction and a driving unit 22 that rotates the photographing apparatus 70 in the pan (left and right) direction are attached to the housing box 27a. The housing box 27a and the housing lid 27b are sealed together with packing (not shown) by bolts to form a sealed structure box.

As shown in FIG. 2 and the like, the driving means 21 is provided at the approximate center in the front-rear direction on the left side surface in the housing box 27a, so that the tilt shaft can be taken out through the housing box 27a. Yes. The penetrating portion is sealed by providing double O-rings.
The driving means 22 is provided at the approximate center in the front-rear direction on the bottom surface in the housing box 27a, and the pan shaft can be taken out through the housing box 27a. The penetrating portion of the pan shaft is similarly sealed. The pan axis is shifted to the left from the left and right center of the body 2 when viewed from the front, but is a result of the pan axis being provided near the center of gravity including the weight of the camera unit 1 provided on the left side of the body 2.

The driving means 21 and 22 in this example are a unit of a stepping motor, a pair of pulleys, a harmonic gear, a rotary encoder, and an electrical connection means, which are the mechanical parts, and are shared by the driving means 21 and 22. Yes. The electrical connection means is a so-called slip ring or the like, which maintains an electrical connection between both sides of the shaft so as to be infinitely or finitely rotatable, and transmits a power source and a video signal. Thereby, the electrical connection between the camera unit 1 and the body 2 and between the body 2 and the base 3 is realized in the through portions of these shafts, and the cables are not exposed to the outside. As described above, the camera unit 1 (camera case 14) and the body 2 are coupled by a special axis and cannot be exchanged except for a combination designed exclusively. This is called the pan head integrated type. However, the camera body 11 in the camera case 14 can be replaced if it fits in the camera case 14.

Further, as shown in FIG. 5 and the like,

fans

28a and 28b are disposed in the casing 27. The fan 28a is arranged so as to be attached to the power supply circuit 23. Air is circulated in the housing 27 by the

fans

28a and 28b, and the driving means 21 and 22 and the power supply circuit 23 are forcibly cooled by air.
In this example, as an option, the tilt axis extends to the side opposite to the side connected to the camera unit 1 so that a lighting device or the like connected to the tilt axis can be attached to the right side of the body 2.

Returning to FIG. 2 again, the outer case 24 is composed of a plurality of resinous or sheet metal members divided at least in the left-right direction, and each member is fixed to the outside of the housing 27 with screws or the like. 1 is formed. This external shape reduces the wind pressure by making it a rounded box shape as a whole. A gap (space) inevitably occurs between the outer case 24 and the housing 27 due to the difference in shape. The outer case 24 has a vent hole 26a in front of the left side surface and a vent hole 26b (not shown) in the bottom surface. The vent hole 26a is located substantially beside the windshield 15 at the normal tilt position of the camera unit 1, and the exhaust gas flowing through the space and discharged from the vent hole 26a reaches the surface of the windshield 15. Yes.

A blower fan 25 is provided on the housing 27. That is, an air flow is forcibly generated in the space between the outer case 24 and the housing 27 to promote heat transfer from the housing 27. The airflow (at least a part of the airflow) is sucked from the vent hole 26b and ejected from the blower fan 25, and then the front surface of the housing 27 is directed forward and turned downward on the front surface. The air is exhausted from the vent hole 26a while the cross section of the flow path is gradually narrowed by the ribs 29 provided on the inner surface. The blower fan 25 uses an environment-adaptive AC fan or DC fan such as drip-proof to handle outside air. In addition, power is supplied to the fan 25 from the inside of the housing 27 through an introduction terminal having a sealed structure, a plug, and the like (not shown). As the blower fan 25, a sirocco fan is used in this example, but an axial fan may be used. The blower fan 25 can be operated by remote control and does not necessarily need to be operated at all times. As an example, when the temperature inside the casing 27 exceeds a predetermined value, the defroster of the windshield 15 is activated by advance setting. When it is made to operate automatically.

In the present embodiment, if the dividing direction of the casing 27 is set to a direction other than the left-right direction of the pan / tilt head integrated camera, it becomes difficult to access the built-in components such as the driving means 21 and so on. It becomes. In addition, when such a casing 27 is die-cast without undercut, the direction of the radiation fins that can be applied to the casing 27 does not necessarily match the direction of the airflow of the blower fan 25. Therefore, the heat radiating fins are provided only on the left and right side surfaces of the housing 27.

According to the present embodiment, the air blow of the windshield 15 can be realized by using most of the current configuration of the camera as it is without separately installing an air supply source such as a compressor.

FIG. 6 is a diagram schematically illustrating the pan / tilt head-integrated camera according to the second embodiment. FIG. 6A illustrates a front surface thereof, and FIG. 6B illustrates a left side surface thereof. The pan / tilt head integrated camera of this example is obtained by externally attaching a nozzle 4 to the pan / tilt head integrated camera according to the embodiment described above.
The nozzle 4 is a resin-like cylindrical member, and is attached to the outer case 24 so that one port covers the vent hole 26a, the other port (injection port) faces the windshield 15, and the vent hole 26a. The exhaust gas from the air is injected to the windshield 15 at a higher flow rate. It is desirable that the injection port be as close as possible to the windshield 15 as long as it does not interfere mechanically with the camera unit 1 even when tilting and does not obstruct the field of view of the camera unit 1. In combination, produce several types. The nozzle 4 has four pawls fitted into the slits of the air holes 26a and fixed to the outer case 24, and the current outer case 24 does not require any special processing.

FIG. 7 is a cross-sectional view of the pan / tilt head integrated camera according to the third embodiment. The pan / tilt head integrated camera of this example is different from that of Example 1 in that exhaust is performed from the periphery of the tilt axis instead of the vent hole 26a and the exhaust reaches the windshield 15 through the camera cover.
As shown in FIG. 7, the camera unit 1 of the pan / tilt head-integrated camera of this example includes camera covers 17 a and 17 b on the upper surface side and the bottom surface side of the camera case 14. The camera covers 17a and 17b are members on a triangular roof that covers each surface, protects the camera case 14 from sunlight radiant heat and falling objects, prevents snow from adhering during snowfall, and the tilt angle deviates greatly from the horizontal. It functions to reduce the wind pressure when The wife side of the roof is rounded so that the tip of the reed (breaking wind) faces down.
The outer case 24 is opened in a circular shape so as to penetrate the tilt axis. In this example, a cylindrical duct 24-1 coaxial with the tilt axis is formed so as to surround the periphery of the opening. A coaxial semi-cylindrical duct is also formed in the camera covers 17a and 17b facing each other. However, the semi-cylindrical duct of the camera cover 17b works together with the cylindrical duct to block the airflow. The outer case 24 is appropriately provided with ribs 29 and the like for guiding the airflow generated by the blower fan 25 to the opening.
As a result, the air flow from the blower fan 25 exits from above the tilt axis of the outer case 24, but a part of the air is guided into the camera cover 17a by the duct, and the space between the camera case 14 and the camera cover 17a. The air travels forward through the windshield, becomes a downward air flow inside the bag, and is blown onto the windshield 15.

The removal of raindrops or the like by air blow that is combined with air cooling for the wind source is not limited to the camera case, but is also suitable for windshields with defrosters for vehicles, ships, and other buildings. If the blow wind pressure is increased, there is a possibility that it can be wiperless.

DESCRIPTION OF SYMBOLS 1 ... Camera part, 11 ... Camera body, 12 ... Lens, 13 ... Video signal circuit board, 14 ... Camera case, 15 ... Windshield, 16 ... Wiper, 17a, 17b ... Camera cover, 2 ... Body, 21, 22 ... Drive means, 23 ... power circuit, 24 ... outer case, 25 ... blower fan, 26a, b ... vent, 27 ... casing, 28a, 28b ... fan, 29 ... rib, 3 ... base, 4 ... nozzle.

Claims

A body having a hermetically sealed casing that houses the drive means for the pan axis and the tilt axis, and an outer case that covers the outside of the casing;
A camera unit rotatably supported by the tilt axis of the body;
A camera platform integrated camera comprising a base that supports the pan axis of the body;
A fan that generates an airflow for air-cooling the housing in a space between the housing and the outer case, and an air guide unit that injects at least a part of the airflow onto the windshield of the camera unit; A pan head integrated camera, further comprising:
The windshield has a defroster, the housing has a two-piece structure made of die-casting, and one of the pieces fixes the driving means for the pan axis and the tilt axis. 2. The pan / tilt head-integrated camera according to claim 1, wherein the pan / tilt head integrated camera operates simultaneously with the Deftstar.
The camera unit includes a camera case having the windshield in front and enclosing and storing a camera body, a camera cover covering an upper surface of the camera case, the camera case and the camera cover, 3. The pan / tilt head-integrated camera according to claim 2, wherein the pan / tilt head camera is a part of the means.