CN2849473Y

CN2849473Y - LED projecting lamp

Info

Publication number: CN2849473Y
Application number: CNU2004200908704U
Authority: CN
Inventors: 沈锦祥
Original assignee: 沈锦祥
Current assignee: Sengled Optoelectronics Co Ltd
Priority date: 2004-10-01
Filing date: 2004-10-01
Publication date: 2006-12-20
Anticipated expiration: 2014-10-01

Abstract

The utility model discloses a light emitting diode projecting lamp which has good performances of heat conduction and heat radiation to extend the service life of an electronic component and especially a light emitting diode. A lamp cup 1 of the utility model is made of metal material. Radiating fins 2 are arranged on the outer wall. An insulating heat conducting aluminum base plate 4 is fixed on a platform of an inner cavity of the lamp cup 1. The upper part of the aluminum base plate 4 is fixed with light emitting diodes LED1, LED2, LED3. The lower part of the aluminum base plate 4 is fixed with a printed circuit plate 5 on which the corresponding electronic component is fixed and connected. The light emitting diodes LED1, LED2, LED3 are electrically connected with the printed circuit plate 5. The inner part of the inner cavity at the lower part of the printed circuit plate 5 in the lamp cup 1 is filled with insulating heat conducting filling material 14 which leads two lamp pins AC1, AC2 to be fixed at the bottom of the lamp cup 1.

Description

A kind of LED spot light

Technical field the utility model relates to a kind of electric light source, i.e. LED spot light.

The existing LED spot light of technical background, its Lamp cup are that glass or plastics are made, and almost do not have thermolysis, and light emitting diode be fixed on can not heat conduction printed circuit board (common name PCD plate, below promptly claim the PCD plate) on, so heat conduction, heat radiation extreme difference.Because electronic devices and components are relatively more responsive to temperature, particularly light emitting diode surpasses the operating temperature that allows, its luminescent properties descends rapidly and causes damaging, and therefore, existing LED spot light has influenced the service life of light emitting diode owing to the restriction of heat conduction, heat dispersion.

The summary of the invention the purpose of this utility model is to improve heat conduction, the heat-sinking capability of LED spot light, thus the service life of improving electronic devices and components, particularly light emitting diode.

For this reason, the technical solution that the utility model proposes is, a kind of LED spot light comprises cup-shaped Lamp cup and is fixed on PCD plate in the Lamp cup inner chamber, and this Lamp cup is that metal material is made; The aluminium base of an insulating heat-conductive is fixed on the platform of Lamp cup inwall, and fixing PCD plate below the fixing light emitting diode above the aluminium base, aluminium base has the operating circuit and the fixing corresponding electronic devices and components of printing on the PCD plate; Fill with the inserts of insulating heat-conductive in the inner chamber in Lamp cup below the PCD plate.

In addition, can in Lamp cup, not inject the inserts of insulating heat-conductive in the conical internal cavity below the PCD plate but hollow yet, and with the pairing wall of cup of this inner chamber on the passage that connects inside and outside several is arranged.

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

Description of drawings Fig. 1 is the structural representation cutaway view of the utility model embodiment 1;

Fig. 2 is the structural representation cutaway view of embodiment 2;

Fig. 3 is the working circuit diagram of

embodiment

1 and 2.

Specific embodiment embodiment 1 is as Fig. 1, shown in Figure 3.Cup-shaped Lamp cup 1 is that heat conduction and heat dispersion good metal material are made, and can be copper or iron, but preferable and practical with aluminium.The fin 2 that its outer wall is distributed with several annulars has further increased area of dissipation, and the number of fin 2 is generally more than 3, below 10.Fin 2 also can be longitudinally even spiral helicine strip fin.Bowl cover 6 is generally transparent glass or plastics are made, and some use occasion can not have bowl cover yet.By the aluminium base 4 of insulating heat-conductive adhesive coating 8 bonding insulating heat-conductives, adhesive coating 8 is generally heat conductive silica gel or heat-conducting silicone grease on the Lamp cup 1 inner chamber platform.Aluminium base 4 also can adopt riveted joint without bonding coat, promptly with rivet aluminium base 4 is riveted on the platform of Lamp cup 1 inner chamber.The PCD plate 5 that then connects an insulation below the aluminium base 4 but can not heat conduction by three screws 7, also can be without attachment screw with the adhesive coating PCD plate 5 that is adhesively fixed.Printed circuit is arranged on the PCD plate 5 and fix and be electrically connected rectifier bridge heap D1, electrolyte filter condenser C1, constant-current source Q1 and resistor R 1, R2, R3, R4, Zener diode D2, D3 thereon.Three LEDs 1, LED2, LED3 then are fixed on the last plane of aluminium base 4, and are electrically connected with the printing system circuit of PCD plate 5.Fill with the inserts 14 of insulating heat-conductive in the inner chamber in Lamp cup 1 below the PCD plate, inserts 14 is generally heat conductive silica gel.Two lamp base AC1, AC2 are filled and are fixed in the Lamp cup 1 bottom rectangle cross section inner chamber after material 14 solidifies, and two lamp base AC1, AC2 connect leads 13 by two and be electrically connected with printed circuit on the PCD plate 5.

Embodiment 2 is as Fig. 2, shown in Figure 3.Be distributed with some annular fin 2 on cup-shaped Lamp cup 1 outer wall of aluminum.Transparent bowl cover 6 is arranged at Lamp cup 1 top.On the Lamp cup 1 inner chamber platform by the aluminium base 4 of insulating heat-conductive adhesive coating 8 bonding insulating heat-conductives, three LEDs 1, LED2, LED3 are fixed in the plane on the aluminium base 4, by heat conduction adhesive coating 8 bonding PCD plates 5, printed circuit is arranged on the PCD plate 5 and fix and be electrically connected rectifier bridge heap D1, filter condenser C1, constant-current source Q1, resistor R 1, R2, R3, R4, Zener diode D2, D3 below the aluminium base 4.Three LEDs 1, LED2, LED3 are electrically connected with printed circuit on the PCD plate 5.At the cup end of the square-section of Lamp cup 1, conventional insulation filling material 14 ' is arranged in its square-section inner chamber, two lamp base AC1, AC2 then are fixed on the bottom of Lamp cup 1 by conventional insulation filling material 14 ', two connect lead 13 two lamp base AC1, AC2 are electrically connected with printed circuit on the PCD plate 5 respectively.On the pairing wall of cup of Lamp cup 1 conical cavity of middle part PCD plate below 5, the approximate rectangular passage 15 that connects inside and outside several is arranged.The quantity of passage 15 is generally more than 3 below 8.

The operating circuit of embodiment 1 and embodiment 2 as shown in Figure 3.Model is that the rectifier bridge heap D1 of MD6S is serially connected between two lamp base AC1, the AC2 two lamp base AC1, the external interchange of AC2 12V power supply.Electrolyte filter condenser C1 is connected across between the both positive and negative polarity of bridge heap D1, and filter condenser C1 positive pole and anodal linking to each other of bridge heap D1.Two sample resistance device R1, R2 and connection circuit are connected across between the constant-current source Q1 input Vin of the anodal A684 of bridge heap D1, two current-limiting resistor R3, R4 and connection circuit then are connected across between bridge heap D1 negative pole and the constant-current source Q1 common port ADJ, Zener diode D2, D3 forward series circuit are connected across between bridge heap D1 positive pole and the constant-current source Q1 common port ADJ, wherein Zener diode D2 positive pole and anodal linking to each other of bridge heap D1.Three LEDs 1, LED2, LED3 forward series circuits are connected across between the negative pole of constant-current source Q1 output end vo ut and bridge heap D1, and wherein the positive pole of LED 1 links to each other with the output end vo ut of constant-current source Q1.Exchange the 12V power supply and after rectifier bridge heap D1 rectification, filter condenser C1 filtering, become direct current 12V.Because tube voltage drop is constant substantially behind the diode current flow, Zener diode D2, D3 series circuit can be stablized the voltage of constant-current source Q1 common port ADJ, and two current-limiting resistor R3, R4 are then to the current limitation of flow through Zener diode D2, D3.Constant-current source Q1 has the effect of output voltage stabilization and constant current, makes load circuit LED 1, LED2, LED3 working stability.Sample resistance device R1, R2 and connection circuit can be adjusted output voltage and the electric current of constant-current source Q1.The number of LED can be set as required, but needs the model and the parameter of corresponding each electronic devices and components of change.

In the

foregoing description

1 and 2, C1 is 470 μ f, and R1 is that 407 Ω, R2 are that 437 Ω, R3 are that 102 Ω, R4 are 102 Ω.

Therefore, the heat that produces when LED 1, LED2, LED3 work is transmitted to Lamp cup 1 through aluminium base 4, insulating heat-conductive adhesive coating 8, because Lamp cup 1 is a metal material, fin is arranged again on the outer wall, greatly improved radiating condition, work thereby LED 1, LED2, LED3 are maintained under the normal operating temperature, prolonged service life.In addition, be fixed on the heat that other electronic devices and components on the PCD plate 5 are produced at work, or be transmitted to Lamp cup 1 through insulation heat conduction inserts 14 (embodiment 1), or through the heat radiation of the air (embodiment 2) of the passage 15 of flowing through, make these components and parts keep normal operating temperature, also help improving the service life of these electronic devices and components.

Claims

1, a kind of LED spot light, comprise Lamp cup (1) and be fixed on printed circuit board (5) in Lamp cup (1) inner chamber, operating circuit and fixing and be electrically connected corresponding electronic devices and components is arranged on the printed circuit board (5), and it is characterized in that: described Lamp cup (1) is that metal material is made; The aluminium base of an insulating heat-conductive (4) is fixed on the platform of Lamp cup (1) inwall, the top fixedly light emitting diode (LED1, LED2, LED3) of aluminium base (4), fixing printed circuit board (5) below the aluminium base (4), light emitting diode (LED1, LED2, LED3) is connected with printed circuit on the printed circuit board (5); Fill with the packing material (14) of insulating heat-conductive in the inner chamber in Lamp cup (1) below the printed circuit board (5).

2, LED spot light according to claim 1 is characterized in that: can state on metalized lamp cup (1) outer wall and be distributed with fin (2).

3, LED spot light according to claim 1, it is characterized in that: the operating circuit on the described printed circuit board (5) is, rectifier bridge heap (D1) is connected across between the live wire (ACD1) and ground wire (ACD2) that exchanges 12V, filter condenser (C1) then is connected across between bridge heap (D1) both positive and negative polarity, and the anodal positive pole with bridge heap (D1) of filter condenser (C1) links to each other, two sample resistance device (R1, R2) and connection circuit be connected across between the input (Vin) of the positive pole of bridge heap (D1) and constant current former (Q1), two current-limiting resistor (R3, R4) and connection circuit then be connected across between the common port (ADJ) of the negative pole of bridge heap (D1) and constant-current source (Q1), Zener diode (D2, D3) the forward series circuit is connected across between the common port (ADJ) of the positive pole of bridge heap (D1) and constant-current source (Q1), wherein Zener diode (D2) is anodal links to each other several light emitting diodes (LED1 with bridge heap (D1) is anodal, LED2, LED3) the forward series circuit output (Vout) that is connected across constant-current source (Q1) links to each other.

4, a kind of LED spot light, comprise Lamp cup (1) and be fixed on printed circuit board (5) in Lamp cup (1) inner chamber, operating circuit and fixing corresponding electronic devices and components are arranged on the printed circuit board (5), and it is characterized in that: described Lamp cup (1) is that metal material is made; The aluminium base of an insulating heat-conductive (4) is fixed on the platform of Lamp cup (1) inwall, the top fixedly light emitting diode (LED1, LED2, LED3) of aluminium base (4), fixing printed circuit board (5) below the aluminium base (4), light emitting diode (LED1, LED2, LED3) is electrically connected with printed circuit on the printed circuit board 5; Several inside and outside courage holes (15) that connects are arranged on the pairing wall of cup of cavity below Lamp cup (1) the middle part printed circuit board (5).

5, LED spot light according to claim 4 is characterized in that: can state on metalized lamp cup (1) outer wall and be distributed with fin (2).

6, LED spot light according to claim 4, it is characterized in that: the operating circuit on the described printed circuit board (5) is, rectifier bridge heap (D1) is connected across between the live wire (ACD1) and ground wire (ACD2) that exchanges 12V, filter condenser (C1) then is connected across between bridge heap (D1) both positive and negative polarity, and the anodal positive pole with bridge heap (D1) of filter condenser (C1) links to each other, two sample resistance device (R1, R2) and connection circuit be connected across between the input (Vin) of the positive pole of bridge heap (D1) and constant current former (Q1), two current-limiting resistor (R3, R4) and connection circuit then be connected across between the common port (ADJ) of the negative pole of bridge heap (D1) and constant-current source (Q1), Zener diode (D2, D3) the forward series circuit is connected across between the common port (ADJ) of the positive pole of bridge heap (D1) and constant-current source (Q1), wherein Zener diode (D2) is anodal links to each other several light emitting diodes (LED1 with bridge heap (D1) is anodal, LED2, LED3) the forward series circuit output (Vout) that is connected across constant-current source (Q1) links to each other.