CN203241685U

CN203241685U - Heat radiation structure of infrared image pickup device

Info

Publication number: CN203241685U
Application number: CN2013202930909U
Authority: CN
Inventors: 柳翼
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2013-05-24
Filing date: 2013-05-24
Publication date: 2013-10-16
Anticipated expiration: 2023-05-24

Abstract

The utility model discloses a heat radiation structure of an infrared image pickup device. The heat radiation structure comprises a shell; a bracket connected with the shell; a circuit board, an LED module and a lens arranged in the shell; and a filter lens arranged in front of the lens. The filter lens comprises a silica gel lens and an infrared filter film, wherein the silica gel lens includes a first surface and a second surface, the center line of the first surface and the second surface relative to the silica gel lens is asymmetrical, and the infrared filter film is located on the first surface or the second surface. The shell, in the position of the lens, is concave downward to form a circular recess, the front end of the inner side face of the recess is flat, the LED module is attached and connected to the front end of the inner side face of the recess, and a plurality of heat radiation fins connected with the shell are arranged in the recess. The heat radiation structure disclosed by the utility model has excellent heat radiation performance, can ensure that the infrared image pickup device is kept in a stable and reliable working state and has the characteristics of simple structure and low implementation cost.

Description

The radiator structure of infrared eye

Technical field

The utility model relates to a kind of watch-dog, especially relates to a kind of radiator structure of infrared eye.

Background technology

At present, along with the reinforcement of security personnel consciousness, monitoring camera more and more is applied to the various aspects of living, and the thing followed is that the working stability performance, serviceable life to infrared eye etc. had higher requirement.

In existing monitor camera device, the array-type LED infrared lamp directly is fixed on the circuit board, the aluminum solar panel is set on the cup of each LED infrared lamp again, and the light-ray condensing that the LED infrared lamp is sent by solar panel becomes the certain limit emission.But, because the cup of each LED infrared lamp contacts with solar panel, but the heat that the LED infrared lamp produces mainly outwards distributes by 2 pins, and 2 pins are welded on the circuit board: on the one hand, because circuit board is to cover copper at the substrate that insulate to form, the heat-sinking capability of circuit board itself is very poor; On the other hand, the heat that gathers on 2 pins of LED infrared lamp is invalid to conduct to solar panel fast, and the thermocontact area between the shell of solar panel and monitor camera device is less, and the heat that causes the LED infrared lamp to produce can't be dispersed timely.

There is following defective in existing monitor camera device:

1, heat dispersion is relatively poor, and the LED infrared lamp is in higher working temperature all the time, causes the mission life working stability performance short, monitor camera device of LED infrared lamp relatively poor.

If 2 need to realize night vision function, generally are the optical filters that a capable of filtering visible is set before camera lens, not only can increase cost, also can increase the lens optical length of camera head.

The utility model content

Technical problem to be solved in the utility model is to propose a kind of simple in structure, radiator structure of realizing the lower and infrared eye that radiating effect is good of cost.

The utility model adopts following technical scheme to realize: a kind of radiator structure of infrared eye, and it comprises: housing; The carriage that connects housing; Be arranged on circuit board, led module and camera lens in the housing; Be arranged on the filter lens in camera lens the place ahead, this filter lens comprises silica-gel lens and infrared filtering film, this silica-gel lens is included as aspheric surface and protruding to object space with for aspheric surface and protruding second surface to picture side, and first surface and second surface are asymmetric shape with respect to the center line of silica-gel lens, and the infrared filtering film then is positioned on first surface or the second surface; The recess that the recessed formation of the housing of lens location one is circular, the front end of this recess medial surface is plane, and led module attaches the front end that is connected to this recess medial surface; The radiating fin of some connection housings is set in recess.

Wherein, between the front end of LED aluminium base and recess medial surface heat-conducting block is set.

Wherein, this housing comprises upper shell, lower house, tail-hood and splash guard, and upper shell is relative with lower house to connect setting, and tail-hood is connected between the tail end of the tail end of upper shell and lower house, and splash guard is connected to the front end of upper shell.

Compared with prior art, the utlity model has following beneficial effect:

The utility model arranges circular recess at housing, at the recess radiating fin, brings in the contact area that increases with the LED aluminium base before the medial surface of utilization formation recess, thereby makes the heat on the LED aluminium base can conduct to rapidly housing.In addition, goggle glass and infrared fileter before the utility model substitutes by filter lens simplify the structure, have reduced the realization cost.Therefore, the radiator structure that the utility model proposes has the characteristics of excellent radiation performance, can guarantee that infrared eye keeps stable, reliable duty.And, the utlity model has simple in structure, the low characteristics of realization cost.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the diagrammatic cross-section of the A-A direction of Fig. 1.

Embodiment

In conjunction with illustrated in figures 1 and 2, the infrared eye that the utility model proposes comprises: by the housing 10 that has good heat conductive performance material (such as the metallic aluminium alloy) and make; Be connected with the fixedly carriage of infrared eye (not shown in FIG.) at housing 10; Be built in the control circuit board 20 in the housing 10; Be fixed on the camera lens 30 in the housing 10; Be successively set on led module 50 and the filter lens in camera lens 30 the place aheads; And at the circular recess 70 of the recessed formation of the housing 10 of camera lens 30 positions one, some radiating fins 40 are set in recess 70.And the front end of the medial surface of recess 70 is plane, and led module 50 is fitted in the front end of medial surface of recess 70 in order to have better thermal conduction effect.

This housing 10 comprises upper shell 11, lower house 12, tail-hood 13 and splash guard 14, upper shell 11 is oppositely arranged with lower house 12, and tail-hood 13 is arranged between the tail end of the tail end of upper shell 11 and lower house 12, and splash guard 14 is arranged on the front end of upper shell 11, and splash guard 14 is used for blocking rainwater and pours filter lens.

Wherein, led module 50 comprises array-type LED infrared lamp and LED aluminium base, and the array-type LED infrared lamp is mounted on the LED aluminium base.And the LED aluminium base is attached to the medial surface front end of recess 70, has larger contact area thereby make between the medial surface front end of LED aluminium base and recess 70, is convenient to heat and conducts fast.

Wherein, filter lens comprises silica-gel lens 60 and is positioned at the wherein infrared filtering film on a surface of silica-gel lens 60, this silica-gel lens 60 comprises first surface 61 and second surface 62 successively from object space to picture side, this first surface 61 is aspheric surface and protruding in object space, this second surface 62 is aspheric surface and protruding in picture side, this first surface 61 and second surface 62 are asymmetric shape with respect to the center line of silica-gel lens 60, and therefore, this silica-gel lens 60 is asymmetric drum type.In addition, the infrared filtering film then is positioned on first surface 61 or the second surface 62.

In one embodiment, the rise of the second surface 62 of silica-gel lens 60 is 0.001～0.05mm, described rise is the edge of second surface 62 on the optical axis direction and the maximum distance between center of second surface 62, and namely the edge of second surface 62 is in the ultimate range of the subpoint of the center of the subpoint on the optical axis and second surface 62 on optical axis.Therefore, these second surface 62 projections are the type projection of releiving, and excessively turnover can not controlled the generation of senior aberration.

Therefore, after the utility model adopts filter lens, no longer need to use glass filter, needed infrared filtering film (being infrared by filter membrane (IR cut film)) directly is plated on the first surface 61 or second surface 62 of silica-gel lens 60, thereby can greatly shorten the optics overall length of camera lens 30.Generally speaking, the LED infrared lamp sends the visible red outside line of 850nm wavelength, and filter lens can filter out the infrared ray greater than the 780nm wavelength.

In addition, in order to improve the heat dispersion of housing, can adopt number of ways: such as, the medial surface front end of LED aluminium base and recess 70 all arranges a heat-conducting block (such as the heat conduction copper billet) and comes accelerated heat to conduct to housing 10 from the LED aluminium base.

Therefore, the radiator structure that the utility model proposes, can guarantee that the heat (being produced by the array-type LED infrared lamp) in the housing head space conducts to rapidly housing, heat can not enter the trailing space of enclosure interior and affect the job stability of circuit board by central space.

The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. the radiator structure of an infrared eye, it comprises: housing; The carriage that connects housing; Be arranged on circuit board, led module and camera lens in the housing; It is characterized in that, also comprise: the filter lens that is arranged on camera lens the place ahead, this filter lens comprises silica-gel lens and infrared filtering film, this silica-gel lens be included as aspheric surface and protruding to object space first surface and be aspheric surface and protruding second surface to picture side, and first surface and second surface are asymmetric shape with respect to the center line of silica-gel lens, and the infrared filtering film then is positioned on first surface or the second surface; The recess that the recessed formation of the housing of lens location one is circular, the front end of this recess medial surface is plane, and led module attaches the front end that is connected to this recess medial surface; The radiating fin of some connection housings is set in recess.

2. the radiator structure of described infrared eye according to claim 1 is characterized in that, between the front end of LED aluminium base and recess medial surface heat-conducting block is set.

3. the radiator structure of described infrared eye according to claim 1 and 2, it is characterized in that, this housing comprises upper shell, lower house, tail-hood and splash guard, upper shell is relative with lower house to connect setting, tail-hood is connected between the tail end of the tail end of upper shell and lower house, and splash guard is connected to the front end of upper shell.