CN203574932U - Circuit board for LED - Google Patents

Abstract

The utility model discloses a circuit board for an LED. The circuit board comprises a circuit board body and a plurality of LED illuminants installed on the circuit board body; a heat-radiation aluminum plate is fixed to and installed on the circuit board body, multiple recesses distributed in the shape of a square matrix are formed in the heat-radiation aluminum plate, and through holes for pins of the LED illuminants to penetrate are formed in the bottom parts of the recesses; smooth insulating layers coat inner walls of the recesses and inner walls of the through holes, and LED illuminants are fallen into the recesses; and the pins of the LED illuminants penetrate the through hole in the bottom parts of the recesses to be fixed to the circuit board body, and electrical conduction is formed. A heat-radiation area is greatly increased, and heat can be radiated rapidly, so the service life is improved. Besides, the recesses of the heat-radiation aluminum plate are bowl-shaped, and the smooth insulating layers coat the inner walls of the recesses, so the recesses can be taken as reflection cups of the LED illuminants to enhance a light-emitting effect of the LED illuminants, the phenomenon that a black spot is in a projected light shadow, and the phenomena of uneven brightness and the like cannot occur.

Description

A kind of LED circuit board

Technical field

The utility model relates to circuit board product technical field, more particularly, relate to a kind of simple in structure, and the good LED circuit board of radiating effect.

Background technology

Printed circuit board (Printing Circuit Board, PCB) is the supplier of electronic devices and components electrical connection.Its development history of existing more than 100 year, it adopts the major advantage of circuit board is the mistake that greatly reduces wiring and assembling, has improved the gentle productive labor rate of Automated water.On traditional printed circuit board (PCB) (PCB), except planning has predetermined electronic circuit, also comprise many grafting electronic unit thereon, these electronic units disengage certain working temperature at work, improper if dispelled the heat, by affecting the operating efficiency of electronic unit, even destroy the running of system.

Nowadays, street lamp has been the lighting apparatus being seen everywhere in cities and towns, it has experienced veryer long development course, up to now, along with deepening continuously of country and the social energy-saving and emission-reduction theory of advocating, with it, the advantage such as energy-conservation, efficient, stable and environmental protection has been applied in the middle of street lamp LED more and more, and LED street lamp is being played the part of more and more important role.

LED street lamp is comprised of a plurality of lighting units mostly at present, and each lighting unit is again by some connected in series or in parallel the forming of LED lamp pearl.Wherein LED lamp pearl short circuit in a lighting unit or while damaging, can cause whole lighting unit short circuit or open circuit, and then affecting the normal use of LED street lamp, and for example, brightness irregularities appears in LED street lamp, and the shadow of projection has blackspot etc.In addition, also there is the bad problem of heat radiation in LED street lamp.

In view of this, the inventor proposes following technical scheme.

Utility model content

The purpose of this utility model is to overcome above-mentioned defect of the prior art, provides a kind of simple in structure, and the good LED circuit board of radiating effect.

For achieving the above object, the technical scheme that the utility model provides is as follows: this LED comprises with circuit board: circuit board body and a plurality of LED luminous element being installed on circuit board body, on described circuit board body, be installed with a heat-dissipating aluminium plate, on this heat-dissipating aluminium plate, form a plurality of depressions that square formation distributes that are, this depression bottom forms the perforation that the pin for LED luminous element passes, wherein, the inwall of depression and perforation is coated with smooth insulating barrier, described LED luminous element falls into this depression, and the pin of LED luminous element is fixed through perforation and the circuit board body of depression bottom, and form and electrically conduct with circuit board body.

Furthermore, in technique scheme, between the bottom of described LED luminous element and described depression bottom and between the pin of LED luminous element and described perforation, be all filled with the fabulous insulating cement of radiating effect.

Furthermore, in technique scheme, described depression is bowl-shape.

Furthermore, in technique scheme, the degree of depth of described depression is more than or equal to the height of LED luminous element, and the width of depression is greater than the width of LED luminous element.

Furthermore, in technique scheme, the size of the size of described heat-dissipating aluminium plate and described circuit board body is suitable.

Furthermore, in technique scheme, the thickness of described heat-dissipating aluminium plate is 5mm ~ 9mm.

Furthermore, in technique scheme, described heat-dissipating aluminium plate is formed with the salient point of being convenient to heat radiation in the periphery of depression, or concave point groove, or wave groove.

Furthermore, in technique scheme, described circuit board body comprises: substrate, be arranged at the conductive layer on substrate and be covered in the anti-ink layer on conductive layer, wherein, on conductive layer, be printed with circuit, pin and the conductive layer of described LED luminous element electrically conduct.

Furthermore, in technique scheme, the thickness of described substrate is 1mm～3mm, the thickness 150 μ m～200 μ m of described conductive layer.

Furthermore, in technique scheme, described LED luminous element is all connected in parallel.

The beneficial effects of the utility model are: because LED luminous element is directly assemblied in the recess of heat-dissipating aluminium plate, and electrically conduct with circuit board body, so greatly increased area of dissipation, the heat energy that makes LED luminous element produce radiate enough fast, to improve useful life of the present utility model.Moreover the recess of heat-dissipating aluminium plate is bowl-shape, and be coated with smooth insulating barrier at depression inwall, can be used as the reflector of LED luminous element, to strengthen the illumination effect of LED luminous element.In addition, LED luminous element is connected in parallel, and the utility model there will not be brightness irregularities, and the shadow of projection has the phenomenons such as blackspot.

Accompanying drawing explanation

Fig. 1 is the utility model structural representation;

Fig. 2 be in Fig. 1 along A-A to cutaway view;

Include in the drawings: 1---circuit board body, 11---substrate, 12---conductive layer, 2---LED luminous element, 21---pin, 3---heat-dissipating aluminium plate, 31---depression.

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Embodiment

Be below the preferred example of circuit board for a kind of LED described in the utility model, therefore do not limit protection range of the present utility model.

Please refer to Fig. 1,2, there is shown the structure of circuit board for a kind of LED.Described LED comprises with circuit board: circuit board body 1 and a plurality of LED luminous element 2 being installed on circuit board body 1.

On described circuit board body 1, be installed with a heat-dissipating aluminium plate 3, on this heat-dissipating aluminium plate 3, form a plurality of depressions 31 that square formation distributes that are, these depression 31 bottoms form the perforation that the pin 21 for LED luminous element 2 passes, wherein, the inwall of depression 31 and perforation is coated with smooth insulating barrier, described LED luminous element 2 falls into this depression 31, and the pin 21 of LED luminous element 2 is fixing through perforation and the circuit board body 1 of depression 31 bottoms, and forms and electrically conduct with circuit board body 1.

Between the bottom of described LED luminous element 2 and described depression 31 bottoms and between the pin 21 of LED luminous element 2 and described perforation, be all filled with the fabulous insulating cement of radiating effect.

Described depression 31 is bowl-shape, and its inwall is coated with smooth insulating barrier, can be used as like this reflector of LED luminous element, to strengthen the illumination effect of LED luminous element.In addition, described LED luminous element 2 is all connected in parallel, and such structure can make the utility model there will not be brightness irregularities, and the shadow of projection has the phenomenons such as blackspot.

The degree of depth of described depression 31 is more than or equal to the height of LED luminous element 2, and the width of depression 31 is greater than the width of LED luminous element 2.In addition, the size of the size of described heat-dissipating aluminium plate 3 and described circuit board body 1 is suitable.And the thickness of described heat-dissipating aluminium plate 3 is 5mm ~ 9mm.

Described heat-dissipating aluminium plate 3 is formed with the salient point of being convenient to heat radiation in the periphery of depression 31, or concave point groove, or wave groove, so not only can effectively to LED luminous element 2, dispel the heat, and can also increase aesthetic of the present utility model.

Described circuit board body 1 comprises: substrate 11, be arranged at the conductive layer 12 on substrate 11 and be covered in the anti-ink layer on conductive layer 12, wherein, on conductive layer 12, be printed with circuit, pin 21 and the conductive layer 12 of described LED luminous element 2 electrically conduct.The thickness of described substrate 11 is 1mm～3mm, the thickness 150 μ m～200 μ m of described conductive layer 12.

Because LED luminous element is directly assemblied in the recess of heat-dissipating aluminium plate, and electrically conduct with circuit board body, so greatly increased area of dissipation, the heat energy that makes LED luminous element produce radiate enough fast, to improve useful life of the present utility model.

Above-described embodiment is preferably execution mode of the utility model; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present utility model and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection range of the present utility model.

Claims (10)

1. a LED circuit board, it comprises: circuit board body (1) and a plurality of LED luminous element (2) being installed on circuit board body (1), it is characterized in that: on described circuit board body (1), be installed with a heat-dissipating aluminium plate (3), on this heat-dissipating aluminium plate (3), form a plurality of depressions (31) that square formation distributes that are, this depression (31) bottom forms the perforation that the pin (21) for LED luminous element (2) passes, wherein, the inwall of depression (31) and perforation is coated with smooth insulating barrier, described LED luminous element (2) falls into this depression (31), and the pin (21) of LED luminous element (2) is fixing through perforation and the circuit board body (1) of depression (31) bottom, and form and electrically conduct with circuit board body (1).

2. a kind of LED circuit board according to claim 1, is characterized in that: between the bottom of described LED luminous element (2) and described depression (31) bottom and between the pin (21) of LED luminous element (2) and described perforation, be all filled with the fabulous insulating cement of radiating effect.

3. a kind of LED circuit board according to claim 2, is characterized in that: described depression (31) is bowl-shape.

4. a kind of LED circuit board according to claim 3, is characterized in that: the degree of depth of described depression (31) is more than or equal to the height of LED luminous element (2), and the width of depression (31) is greater than the width of LED luminous element (2).

5. a kind of LED circuit board according to claim 1, is characterized in that: the size of the size of described heat-dissipating aluminium plate (3) and described circuit board body (1) is suitable.

6. a kind of LED circuit board according to claim 5, is characterized in that: the thickness of described heat-dissipating aluminium plate (3) is 5mm ~ 9mm.

7. according to a kind of LED circuit board described in claim 1-6 any one, it is characterized in that: described heat-dissipating aluminium plate (3) is formed with the salient point of being convenient to heat radiation in the periphery of depression (31), or concave point groove, or wave groove.

8. according to a kind of LED circuit board described in claim 1-6 any one, it is characterized in that: described circuit board body (1) comprising: substrate (11), be arranged at the conductive layer (12) on substrate (11) and be covered in the anti-ink layer on conductive layer (12), wherein, conductive layer is printed with circuit on (12), and the pin (21) of described LED luminous element (2) electrically conducts with conductive layer (12).

9. a kind of LED circuit board according to claim 8, is characterized in that: the thickness of described substrate (11) is 1mm～3mm, the thickness 150 μ m～200 μ m of described conductive layer (12).

10. a kind of LED circuit board according to claim 9, is characterized in that: described LED luminous element (2) is all connected in parallel.

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