CN110855858B

CN110855858B - Camera with integrated protective cover

Info

Publication number: CN110855858B
Application number: CN201810955490.9A
Authority: CN
Inventors: 王汉荣
Original assignee: Hangzhou Hikvision Digital Technology Co Ltd
Current assignee: Hangzhou Hikvision Digital Technology Co Ltd
Priority date: 2018-08-21
Filing date: 2018-08-21
Publication date: 2021-03-19
Anticipated expiration: 2038-08-21
Also published as: CN110855858A

Abstract

The invention discloses a camera with an integrated protective cover. The shroud-integrated camera includes: shroud and lens and rifle type camera, rifle type camera (3) include circuit board (33) and heat-sink assembly (34), heat-sink assembly (34) include: a first heat-conducting member in heat-conducting contact with the circuit board; a second heat conducting member in heat conducting contact with the shield; and the heat pipe comprises a heat absorption end (3451), a heat dissipation end (3453) and a connection pipe body (3452) connected with the heat absorption end and the heat dissipation end, wherein the heat absorption end (3451) is connected with the first heat conduction member (342), and the heat dissipation end (3452) is connected with the second heat conduction member (346). The shroud-integrated camera of the present invention shortens the heat flow path to: circuit board → heat radiation component → shield shell → outside air, greatly shorten the heat flow path, subtract the link that the thermal resistance is great, realize good heat dissipation.

Description

Camera with integrated protective cover

Technical Field

The invention relates to the technical field of monitoring, in particular to a shield integrated camera.

Background

The camera with integrated shield comprises a shield, and a lens and a gun-shaped camera arranged in the shield. The gun-shaped camera contains a circuit board which is a main heating source in the protective cover integrated camera. In the prior art, the heat of the circuit board in the shield-integrated camera needs to pass through such a heat flow path: circuit board → heat sink → camera housing → camera fixing sheet metal → shield housing → outside air.

The gun-shaped camera needs to move back and forth in the shield to adapt to lenses with different lengths, so that the camera fixing metal plate and the shield shell cannot be completely locked, a gap exists in the middle, and a heat-conducting medium cannot be filled in the gap, so that in the heat flow channel, the heat resistance of the channel of the camera fixing metal plate → the shield shell is very large, and the heat dissipation effect is seriously influenced.

It is therefore desirable to have a solution that overcomes or at least alleviates at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

It is an object of the present invention to provide a shroud-in-one camera that overcomes or at least mitigates at least one of the above-mentioned disadvantages of the prior art.

To achieve the above object, the present invention provides a camera with a cover integrated therein. The shroud-integrated camera includes: the guard shield with set up camera lens and rifle type camera in the guard shield, rifle type camera includes circuit board and radiator unit, radiator unit includes:

a first heat-conducting member in heat-conducting contact with the circuit board;

a second heat conducting member in heat conducting contact with the shield; and

the heat pipe comprises a heat absorption end, a heat dissipation end and a connecting pipe body connected with the heat absorption end and the heat dissipation end, wherein the heat absorption end is connected with the first heat conduction piece, and the heat dissipation end is connected with the second heat conduction piece.

Preferably, a phase change thermal pad is disposed between the first thermal conductive member and the circuit board.

Preferably, the camera with the integrated shield further comprises a fixing metal plate, the fixing metal plate is fixedly connected to the camera body of the gun-shaped camera, and the first heat conducting piece is connected to the fixing metal plate through an elastic sheet so as to elastically clamp the phase change heat conducting pad between the first heat conducting piece and the circuit board.

Preferably, the number of the first heat-conducting members is one, the number of the second heat-conducting members is two, the two heat pipes are spaced apart from each other and are arranged in parallel, and the two second heat-conducting members and the two heat pipes are arranged in bilateral symmetry.

Preferably, the heat absorbing ends of the heat pipes are parallel to the heat dissipating ends, the connecting pipe body is bent in an arc shape, and the distance between the heat dissipating ends of the two heat pipes is greater than the distance between the heat absorbing ends.

Preferably, the fixed metal plate comprises two metal plate sheets which are spaced from each other in the optical axis direction of the lens, the number of the elastic sheets is two, two ends of each elastic sheet are respectively connected with one metal plate sheet, and two ends of the first heat-conducting piece are connected to the middle of the corresponding elastic sheet.

Preferably, a heat conducting pad is provided between the second heat conducting member and the shield.

Preferably, the heat conduction pad is a single-side sticky heat conduction pad, a sticky surface of the heat conduction pad is adhered to the second heat conduction piece, one side opposite to the sticky surface is a smooth surface, and the smooth surface is in contact with the shield.

Preferably, the second heat conducting member is provided with an arc groove, and the heat dissipation end of the heat pipe is a circular pipe and is fixedly matched in the arc groove.

Preferably, the rifle type camera has the casing, the casing is fixed on the fixed panel beating of camera, and pass through the fixed panel beating of camera is connected to the guard shield, wherein, the casing of rifle type camera with be provided with the opening on the fixed panel beating of camera, the second heat conduction piece passes the opening stretches out to outside the casing of the fixed panel beating of camera.

Preferably, the connection pipe body of the heat pipe is an elastic pipe body.

The shroud-integrated camera of the present invention shortens the heat flow path to: circuit board → heat radiation component → shield shell → outside air, greatly shorten the heat flow path, subtract the link that the thermal resistance is great, realize good heat dissipation.

Drawings

Fig. 1 is a schematic view of a shroud-integrated camera.

Fig. 2 is a schematic diagram of a cross-sectional view of a gun type camera.

Fig. 3 is an exploded schematic view of the gun type camera.

Fig. 4 is a schematic view of a shroud-integrated camera heatsink assembly.

Reference numerals:

1	protective cover	341	Phase change heat conducting pad
				2	Lens barrel	342	First heat conducting member
3	Gun type camera	343	Spring plate
				4	Fan with cooling device	344	Fixing metal plate
5	Functional module	345	Heat pipe
				31	Upper casing	346	Second heat conducting member
32	Camera body	347	Single-side adhesive heat conducting pad
				33	Circuit board	3451	Heat absorption end
34	Heat radiation assembly	3452	Connecting pipe body
				35	Lower casing	3453	Heat radiation end
36	Camera fixing metal plate

Detailed Description

In the drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, the terms "central", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.

As shown in fig. 1, the shroud-integrated camera includes a shroud 1, and a lens 2, a gun-type camera 3, a fan 4, and other functional modules 5 provided in the shroud 1. The gun type camera includes an upper case 31, a main body (camera body) 32, a circuit board 33, a heat dissipating member 34, a lower case 35, and a camera fixing metal plate 36. The upper case 31 and the lower case 35 form a housing of the gun type camera. The circuit board 33 is fastened to the camera body 32 by screws. A heat sink assembly 34 is also secured to the camera body 32. The camera body 32 is the main body of the camera and may be of any suitable shape and construction.

The lens 2 can be adjusted in length to achieve different focal lengths. Accordingly, the gun camera 3 can be moved back and forth within the shroud to accommodate lenses 2 of different lengths. The fan 4 enhances the air flow within the shroud to enhance heat dissipation. Specifically, the movement of the gun camera 3 in the front-rear direction with respect to the shield 1 is realized by the camera fixing metal plate 6. That is, the gun type camera 3 is connected to the shield 1 through the camera fixing metal plate 6.

Compared with the prior art, the protective cover integrated camera shortens a heat dissipation path, and particularly eliminates a path with high thermal resistance. The shield integrated camera of the embodiment of the present invention includes: a shield 1, and a lens 2 and a gun camera 3 provided in the shield 1. The gun camera 3 includes a circuit board 33 and a heat sink assembly 34. The circuit board 33 is the primary heat source. The heat dissipation assembly directly transfers the heat of the circuit board to the shield.

Specifically, the heat dissipation assembly 34 includes:

a first thermal conductor 342 in thermal conductive contact with the circuit board 33;

a second heat conducting member 346 in heat conducting contact with the shield 1; and

the heat pipe 345 includes a heat absorbing end 3451, a heat dissipating end 3453 and a connecting pipe 3452 connecting the heat absorbing end and the heat dissipating end, wherein the heat absorbing end 3451 is connected to the first heat conducting member 342, and the heat dissipating end 3452 is connected to the second heat conducting member 346. The heat pipe is a metal pipe containing working medium, and has excellent heat transfer capacity by utilizing phase change and heat conduction for heat transfer.

The two ends of the heat pipe 345 are respectively fixed on the first heat-conducting member 342 and the second heat-conducting member 346 by riveting, wherein the first heat-conducting member 342 is connected to the heat-absorbing end of the heat pipe, and the second heat-conducting member 436 is connected to the heat-releasing end of the heat pipe. The two ends (heat absorbing end and heat releasing end) of the heat pipe 345 need to be riveted with the surface of the heat conducting member to ensure complete close contact with the heat conducting pad and less thermal resistance.

As shown in fig. 4, the heat dissipation assembly 34 in the gun-shaped camera 3 includes a phase change heat conduction pad 341, a first heat conduction member (first profile) 342 (corresponding to a heat absorption end), two elastic pieces 343, two fixing metal plates 344, two heat pipes 345, two second heat conduction members (second profiles) 346 (corresponding to a heat release end), and two single-sided adhesive heat conduction pads 347.

The phase change thermal pad 341 is disposed between the first thermal conductive member 342 and the circuit board 333, and when the temperature is higher than the critical temperature, the phase change thermal pad 341 is in a viscous liquid state; when the temperature is lower than the critical temperature, the material is in a solid state.

Since the volume (or thickness) of the phase change thermal pad 341 changes due to the phase change, the elastic sheet 343 is used to connect the first thermal conductive member 42 and the fixing metal plate 344. The first thermal conductive member 342 can move relatively according to the thickness variation of the thermal pad 341 to ensure the close contact between the first thermal conductive member 342 and the thermal pad 341 and the close contact between the thermal pad 341 and the circuit board 33, thereby maintaining relatively low thermal resistance.

The first heat-conducting member 342 is a first profile. Advantageously, the first thermal conduction member 342 is substantially T-shaped, and has a smaller width on one side contacting the circuit board and a larger width on the other side for connection with the spring 343.

In order to facilitate heat conduction, a phase-change thermal pad 341 (also referred to as a phase-change thermal pad 341) is preferably disposed between the first thermal conductive member 342 and the circuit board 33.

The shroud-integrated camera further includes a fixing sheet metal 344. The fixing sheet metal 344 belongs to a part of the heat dissipating assembly. The fixing sheet metal 344 is fixedly connected to the camera body 32 of the gun type camera 3. The first thermal conductive element 342 is connected to the fixed metal plate 344 through the elastic sheet 343 as described above, so as to elastically clamp the phase change thermal conductive pad 341 between the first thermal conductive element 342 and the circuit board 33.

In the illustrated embodiment, the first thermal conduction member 342 is one in number so as to be in good contact fit with the circuit board. The number of the second heat conduction members 346 is two, and the two second heat conduction members 346 and the two heat pipes are spaced apart from each other and arranged in parallel, the number of the heat pipes 345 is two, and the two second heat conduction members 346 and the two heat pipes are arranged in bilateral symmetry. Therefore, the heat dissipation assembly has better stability, and the second heat conduction piece can have larger contact area on the whole.

As shown in the drawings, the heat absorbing ends 3451 of the heat pipes are parallel to the heat dissipating ends 3453, and the connecting pipe 3452 is bent in an arc shape, and the distance between the heat dissipating ends 3453 of the two heat pipes is greater than the distance between the heat absorbing ends. The curved connection tube 3452 provides a certain elasticity to facilitate the second heat conduction member 346 to be in close contact with the shield. Advantageously, the connection pipe 3452 of the heat pipe 345 is an elastic pipe.

Specifically, the fixed metal plate 344 includes two metal plate pieces spaced apart from each other in the optical axis direction of the lens, the number of the elastic pieces is two, two ends of each elastic piece are respectively connected to one metal plate piece, and two ends of the first heat-conducting member 342 are connected to the middle portion of the corresponding elastic piece. This is advantageous in providing better resilience.

Advantageously, a thermal pad 347 is provided between the second thermal conductor 346 and the shield 1. The heat conducting pad 347 is a single-sided adhesive heat conducting pad. The tacky surface of the thermal pad 347 is bonded to the second thermal conductive member 346, and the side opposite to the tacky surface is a smooth surface which is in contact with the shield 1. That is, the non-adhesive side of the thermal pad 347 is in direct contact with the shield 1. Since the surface of the heat conduction pad 347 in contact with the shield is not sticky, the pad can move relatively. When the camera needs to move back and forth due to lens adjustment or lens replacement, the heat conducting pad cannot be damaged. Specifically, when the gun-type camera needs to move, the gun-type camera can move back and forth only by slightly lifting, and the thermal pad does not need to be torn to damage.

The second heat conducting member 346 is provided with an arc groove, and the heat dissipating end 3453 of the heat pipe 345 is a circular pipe and is fixedly fitted in the arc groove.

The gun-shaped camera 3 has a housing fixed on a camera fixing sheet metal 36 and connected to the shield 1 through the camera fixing sheet metal 36, wherein openings are provided on the housing of the gun-shaped camera 3 and the camera fixing sheet metal 36, and the second heat conducting member 346 passes through the opening and extends out of the housing of the camera fixing sheet metal 36.

Regarding the material of the related members, it is recommended to use SUS 3043/4H because the elastic sheet 343 has certain requirements for elasticity and strength. The fixing plate 344 is used to fix the entire heat sink assembly 34 to the camera body 32, and needs to have a certain strength, and is preferably made of SECC.

The first thermal conductive member 342 and the second thermal conductive member 346 simultaneously perform a heat transfer function, require a certain thermal conductivity, and are preferably AL 6063.

The second heat conduction member 346 has a heat radiating end (upper side in fig. 4) fixedly connected to the heat pipe 345, and a single-sided adhesive heat conduction pad 347 adhered to one side (lower side in fig. 4).

The lower case 35 is fixed to the camera fixing metal plate 36. The positions of the lower shell 35 and the camera fixing metal plate 36 corresponding to the second heat conducting member 346 need to be hollowed, so that the surface of the second heat conducting member 346 can exceed the metal plate 36. The heat transfer process of the heat dissipation assembly and the installation method thereof is as follows: the heat is transferred from the circuit board 33 to the heat absorbing end of the heat pipe 345 through the phase change heat conducting pad 341 by heat conduction, and then transferred to the heat releasing end by the operation of the heat pipe, and the heat at the heat releasing end is transferred to the shield 1 through the second heat conducting member 346 and the heat conducting pad 347 in turn by heat conduction. Finally, the shroud 7 releases the heat to the air by convective heat dissipation.

The above heat transfer process can be simplified as: compared with a common heat flow channel, the circuit board → the heat dissipation assembly → the shield → the external air, the process of 'the heat dissipation assembly → the camera shell → the camera fixing metal plate' is omitted, the thermal resistance is greatly reduced, and the heat transfer efficiency is improved.

Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Those of ordinary skill in the art will understand that: modifications can be made to the technical solutions described in the foregoing embodiments, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A shroud-integrated camera, comprising: guard shield (1) and setting are in camera lens (2) and rifle type camera (3) in guard shield (1), rifle type camera (3) include casing, circuit board (33) and radiator unit (34), circuit board (33) set up in the casing, radiator unit (34) include:

a first heat conduction member (342) in heat conductive contact with the circuit board (33), wherein a phase change heat conduction pad (341) is provided between the first heat conduction member (342) and the circuit board (33);

a second heat conducting member (346) in heat conducting contact with the shield (1); and

a heat pipe (345) including a heat absorbing end (3451), a heat dissipating end (3453) and a connecting pipe (3452) connecting the heat absorbing end and the heat dissipating end, the heat absorbing end (3451) being connected to the first heat-conducting member (342), and the heat dissipating end (3453) being connected to the second heat-conducting member (346),

the camera integrated with the shield further comprises a fixing metal plate (344), the fixing metal plate (344) is fixedly connected to a camera body (32) of the gun-shaped camera (3), and the first heat conducting piece (342) is connected to the fixing metal plate (344) through an elastic sheet (343) so as to elastically clamp the phase change heat conducting pad (341) between the first heat conducting piece (342) and the circuit board (33).

2. The cover-in-one camera as claimed in claim 1, wherein the number of the first heat-conducting members (342) is one, the number of the second heat-conducting members (346) is two, and the two heat pipes (345) are spaced apart from each other and arranged in parallel, and the two second heat-conducting members (346) and the two heat pipes are arranged in bilateral symmetry.

3. The camera as claimed in claim 2, wherein the heat absorbing ends (3451) of the heat pipes are parallel to the heat dissipating ends (3453), and the connecting pipe body (3452) is arcuately bent, and a distance between the heat dissipating ends (3453) of the two heat pipes is greater than a distance between the heat absorbing ends.

4. The shroud-integrated camera according to claim 3,

the fixed metal plate (344) comprises two metal plate sheets which are spaced from each other in the optical axis direction of the lens, the number of the elastic sheets is two, two ends of each elastic sheet are respectively connected with one metal plate sheet, and two ends of the first heat-conducting piece (342) are connected to the middle of the corresponding elastic sheet.

5. The cover integrated camera according to claim 1, wherein a thermal pad (347) is provided between the second thermal conductive member (346) and the cover (1).

6. The shroud-integrated camera of claim 5, characterized in that the thermal pad (347) is a single-sided adhesive thermal pad, an adhesive surface of the thermal pad (347) is bonded to the second thermal conductive member (346), and a side opposite to the adhesive surface is a smooth surface which is in contact with the shroud (1).

7. The shroud-integrated camera according to claim 1, wherein the second heat-conducting member (346) is provided with an arc groove, and the heat dissipating end (3453) of the heat pipe (345) is a circular pipe and is fixedly fitted in the arc groove.

8. Shroud-integrated camera according to any one of claims 1 to 7, characterized in that the gun-type camera (3) has a housing which is fixed to a camera fixing sheet metal (36) and is connected to the shroud (1) by means of the camera fixing sheet metal (36), wherein openings are provided in the housing of the gun-type camera (3) and the camera fixing sheet metal (36), through which the second heat-conducting member (346) protrudes out of the housing of the camera fixing sheet metal (36).

9. The shield-integrated camera according to any one of claims 1 to 7, wherein the connection tube body (3452) of the heat pipe (345) is an elastic tube body.