CN201935001U

CN201935001U - Light-emitting diode (LED) lighting device

Info

Publication number: CN201935001U
Application number: CN2011200155733U
Authority: CN
Inventors: 张兴; 周有旺
Original assignee: KUNSHAN HUAYING GUANGBAO TECHNOLOGY CO LTD
Current assignee: Jiangsu Huaying Guangbao Technology Co., Ltd.
Priority date: 2011-01-19
Filing date: 2011-01-19
Publication date: 2011-08-17
Anticipated expiration: 2021-01-19

Abstract

The utility model discloses an LED lighting device which comprises a heat radiating substrate (3), a circuit board (2) arranged above the heat radiating substrate (3), LED chips (4) arranged on the upper surface of the circuit board (2) and a diffuser (1) arranged above the LED chips (4). A light exit surface of the LED chips (4) is towards to the diffuser (1). The bottom of the diffuser (1) is connected with the top of the heat radiating substrate (3). The LED chips (4) are arranged on the axis of the circuit board (2) at intervals in a row. The two ends of the heat radiating substrate (3) form a pair of bayonets (31) with opposite openings. The end part of the diffuser (1) is provided with a pair of blocking slices (11) fitted with the bayonets (31). The bottom of the heat radiating substrate (3) is provided with a plurality of heat sinks (32) extending downwards. The LED lighting device overcomes the problems in the existing technology and provides an LED lamp with stable connection and large heat radiating.

Description

The LED lighting device

Technical field

The utility model relates to a kind of LED lighting device.

Background technology

LED (Light Emitting Diode) is the efficient solid state light emitter that the faint electric energy of a kind of usefulness of based semiconductor PN junction just can be luminous, under certain forward bias voltage and injection electric current, the electronics that injects the hole in P district and injection N district is diffusing to active area after radiation recombination and send photon, electric energy is converted into luminous energy, because LED is a kind of solid-state cold light source, have characteristics such as environment friendly and pollution-free, little power consumption, light efficiency height, life-span be long.LED lighting device of the prior art, shown in accompanying drawing 1, the bayonet socket opening of its heat-radiating substrate outwardly, and diffuser has the card that extends internally, the card of diffuser stretches in the bayonet socket of heat-radiating substrate and installs and fixes, but this connected mode causes in transportation, when diffuser is squeezed, causes diffuser and heat-radiating substrate to be separated from each other easily; In addition, because the caloric value of LED is huge, the area of dissipation of LED lighting device of the prior art is too small, causes the LED life-span sharply to shorten.

Summary of the invention

In order to solve the problems of the prior art, the purpose of this utility model provides a kind of LED lighting device stable, that area of dissipation is big that connects.

In order to achieve the above object, the utility model provides a kind of LED lighting device, it comprises heat-radiating substrate, be arranged on the circuit board of described heat-radiating substrate top, be positioned at the led chip of described circuit board upper surface, and the diffuser that is positioned at described led chip top, the exiting surface of described led chip is towards described diffuser, the bottom of described diffuser is connected with the top of described heat-radiating substrate, described led chip forms a line and is disposed on the axis of described circuit board, the two ends of described heat-radiating substrate form the relative bayonet socket of pair of openings, the end of described diffuser has the card that a pair of and described bayonet socket matches, and the below of described heat-radiating substrate is provided with the fin of a plurality of downward extensions.

Preferably, described a plurality of fin is shaped in the lower surface of described heat-radiating substrate.

Preferably, described a plurality of fin forms a cambered surface away from the outer end of described heat-radiating substrate.

Preferably, have a plurality of heat-sink units on each described fin, the cross section of each described heat-sink unit is approximate rounded, and described heat-sink unit is wavy distribution at the outer surface of described fin.

Preferably, described diffuser is the PC cover.

Preferably, be coated with fluorescence coating on the inwall of described diffuser.

Owing to adopted technique scheme, make the utility model compared with prior art have following beneficial effect: when diffuser is squeezed, the roof of heat-radiating substrate bayonet socket contacts with diffuser, born the pressure that diffuser is subjected to, make to connect and stablize, in addition, greatly increase area of dissipation, improved the service life of LED.

Description of drawings

Accompanying drawing 1 is the main cutaway view of LED lighting device of the prior art;

Accompanying drawing 2 is the main cutaway view according to the embodiment of the utility model LED lighting device;

Wherein: 1, diffuser; 11, card; 2, circuit board; 3, heat-radiating substrate; 31, bayonet socket; 32, fin; 33, heat-sink unit; 4, led chip.

The specific embodiment

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is described in detail, thereby protection domain of the present utility model is made more explicit defining so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that.

Referring to accompanying drawing 2, a kind of LED lighting device, it comprises heat-radiating substrate 3, be arranged on the circuit board 2 at heat-radiating substrate 3 tops, be arranged on a plurality of led chips 4 of circuit board 2 upper surfaces, diffuser 1, the exiting surface of a plurality of led chips 4 is towards diffuser 1, the bottom of diffuser 1 is connected with the top of heat-radiating substrate 3, the two ends of heat-radiating substrate 3 form the relative bayonet socket 31 of pair of openings, the end of diffuser 1 has a pair of card 11 that matches with bayonet socket 31, in the present embodiment, diffuser 1 is Ω shape substantially, thereby when diffuser 1 is squeezed, the roof of heat-radiating substrate 3 bayonet sockets 31 contacts with diffuser 1, born the pressure that diffuser 1 is subjected to, the situation that can not cause diffuser 1 certain part stress too to concentrate has avoided diffuser 1 to separate with heat-radiating substrate 3 in extrusion process, even the situation of breaking, compare with exterior buckle type, increased aluminium radiator and air contact area.

A plurality of led chips 4 form a line and are disposed on the axis of circuit board 2 in the present embodiment, and led chip 4 all is to be separated into multiple row to arrange in the traditional design.After the LED lighting device has used a period of time, illumination decay in various degree all can take place in each led chip 4, the LED lighting device of that apportion setting will be seen strong light intensity uneven phenomenon owing to optical attenuation difference everywhere on outer wall, and used the led chip 4 that is arranged in row, will reduce to LED lighting device light intensity uneven phenomenon minimum.

The below of heat-radiating substrate 3 is provided with the fin 32 of a plurality of downward extensions, fin 32 is perpendicular to heat-radiating substrate 3 diapires, parallel arrangement, have a plurality of heat-sink units 33 on each fin 32, the cross section of each heat-sink unit 33 is approximate rounded, heat-sink unit 33 is wavy distribution at the outer surface of fin 32, so just under the prerequisite that does not increase volume at double increase area of dissipation, thermolysis by the heat-sink unit 33 on a plurality of fin 32 and the fin 32, the heat of led chip 4 can in time be discharged in the extraneous air, make the LED lighting device have outstanding heat dispersion, in practice, the prerequisite that can increase LED power reducing the LED number is issued to identical brightness, has reduced production cost.In order to reduce the manufacturing cost in manufacture process, the fin 32 in the present embodiment is one-body molded with heat-radiating substrate 3.Certainly use the fin 32 of split setting also should not limit protection domain of the present utility model with heat-radiating substrate 3 combinations.

A plurality of fin 32 form a cambered surface away from the outer end of heat-radiating substrate 3 in the present embodiment, the length of the fin 32 in the middle of promptly being positioned at is greater than fin 32 length that are positioned at the edge, and the length of each fin 32 is greater than its other being positioned at than fin 32 length at edge and less than its other length that is positioned at middle fin 32.Because light fixture generally all is to be close to the wall setting, and the fin 32 of cambered surface design can make each fin 32 can directly touch extraneous air, prevents to be positioned at fin 32 than the center and can't well dispel the heat and cause the uneven problem of each position heat radiation of LED lighting device.

Diffuser 1 is the PC cover, i.e. Merlon cover, and Merlon is a kind of water white indefiniteness thermoplastic.The Merlon water white transparency, heat-resisting, shock resistance, fire-retardant, the favorable mechanical performance is all arranged in common serviceability temperature.The impact resistance of Merlon is good, the refractive index height, and good processability does not need additive just to have fire resistance.Also be provided with fluorescence coating on the inwall of diffuser 1, because the restriction of production technology, can be more or less between the led chip of the prior art, inevitably exist aberration, and this small aberration is because the expansion effect of diffuser, then can before user, present regional colourity difference slightly, and under the effect of the fluorescent material that selectivity is changed, inconsistent light frequency is converted into identical light frequency output, thereby has eliminated aberration.

By above-mentioned embodiment, be not difficult to find out that the utility model is a kind of LED lighting device stable, that area of dissipation is big that connects.Abovely the utility model is described in detail in conjunction with embodiment; only be explanation technical conceive of the present utility model and characteristics; its purpose is to allow the people that is familiar with this technology understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model spirit essence change or modify, and all should be encompassed in the protection domain of the present utility model.

Claims

1. LED lighting device, it comprises heat-radiating substrate (3), be arranged on the circuit board (2) of described heat-radiating substrate (3) top, be positioned at the led chip (4) of described circuit board (2) upper surface, and the diffuser (1) that is positioned at described led chip (4) top, the exiting surface of described led chip (4) is towards described diffuser (1), the bottom of described diffuser (1) is connected with the top of described heat-radiating substrate (3), it is characterized in that: described led chip (4) forms a line and is disposed on the axis of described circuit board (2), the two ends of described heat-radiating substrate (3) form the relative bayonet socket (31) of pair of openings, the end of described diffuser (1) has the card (11) that a pair of and described bayonet socket (31) matches, and the below of described heat-radiating substrate (3) is provided with the fin (32) of a plurality of downward extensions.

2. LED lighting device according to claim 1 is characterized in that: described a plurality of fin (32) are shaped in the lower surface of described heat-radiating substrate (3).

3. LED lighting device according to claim 2 is characterized in that: described a plurality of fin (32) form a cambered surface away from the outer end of described heat-radiating substrate (3).

4. LED lighting device according to claim 3, it is characterized in that: have a plurality of heat-sink units (33) on each described fin (32), the cross section of each described heat-sink unit (33) is approximate rounded, and described heat-sink unit (33) is wavy distribution at the outer surface of described fin (32).

5. LED lighting device according to claim 1 is characterized in that: described diffuser (1) is the PC cover.

6. LED lighting device according to claim 1 is characterized in that: be coated with fluorescence coating on the inwall of described diffuser (1).