CN201434300Y - A kind of LED car headlight - Google Patents

Abstract

The utility model discloses an LED automobile headlight, which comprises a single LED light source, a driving device for driving the LED light source, a secondary optical part, and a radiator. The secondary optical part is covered by the radiator. Above, the single LED light source is arranged at the optical center in the secondary optical part and on the top surface of the heat sink. The LED automobile headlight of the utility model adopts a single LED light source, so the structure is more reasonable and the assembly is more convenient. light distribution performance.

Description

A kind of LED car headlight

technical field

The utility model relates to the technical field of automobile headlight lighting, in particular to an automobile headlight using a single LED as a light source.

Background technique

The automobile headlights of the prior art generally adopt halogen lamps or gas discharge lamps as the light source of the automobile headlights, and the above two kinds of lamps will continue to dissipate heat to the outside during the process of lighting and long-term use, causing the headlight lamps to The temperature inside the car is very high, which is easy to cause a certain negative impact on the lamps, and the power of the above two types of lamps is high when used, and the power consumption in the car is large, which makes the car consume a lot of fuel, which is not conducive to environmental protection.

With the application and promotion of LED technology, its advantages such as low energy consumption, long life, fast response speed, and good color rendering replace the concept of high energy consumption, short life, and slow response time of traditional lamps (such as tungsten lamps and fluorescent lamps). It is more and more accepted by people. Most people praise the environmental protection and energy saving effects of LED application in automobile headlights. In the long run, the application of LED technology in the field of automobile headlights is the need of social development. LED lights are Ideal for replacing traditional light sources in existing automotive headlights.

However, high-power LED lamps will emit a lot of heat during operation. If the heat cannot be dissipated in time, the temperature of the LED core will rise rapidly. The increase in temperature will lead to changes and attenuation of the performance of LED components, and even failure. ; The attenuation of LED performance, thereby reducing the light distribution effect of the secondary optical treatment of LED car headlights, and affecting the safety of car driving.

Contents of the invention

The purpose of this utility model is to overcome the problem that high-power LEDs are easy to accumulate too much heat in the prior art, reduce the service life of LEDs, and affect the light distribution effect of LED automobile headlights, and provide a single LED as a light source. Automobile headlights, after secondary optical treatment and heat dissipation treatment, meet the performance and use requirements of LED automobile headlights, and popularize energy-saving and environmentally friendly light source LEDs as automobile headlights as light sources.

In order to achieve the above purpose, the utility model adopts the following technical solutions: an LED automobile headlight, including a single LED light source and a driving device for driving the LED light source, a secondary optical part, a radiator, the two The secondary optical part is covered on the radiator, and the single LED light source is arranged at the optical center in the secondary optical part and on the top surface of the radiator.

A single LED light source is powered by a general-purpose drive device and then emits light upwards. After the light reflection and refraction processing of the secondary optical part, the effective light is irradiated to the area specified by the lighting regulations of the automobile headlights to meet the light distribution performance requirements of the automobile headlights. Because only a single LED light source is used, and a radiator is equipped for it to dissipate heat, it can greatly reduce the temperature inside the lamp and ensure the service life of the LED lamp.

The heat sink includes a heat sink main body, an insert-type lamination arranged on the side of the heat sink main body, and a heat base arranged on the top of the heat sink main body, and the single LED light source is set on the heat base. The side of the main body of the radiator adopts a sheet structure, and the heat base is connected to the main body of the radiator, which can better dissipate the heat generated by a single LED light source when it is working.

A groove is opened on the heat base, and a heat pipe is also included. One end of the heat pipe is placed in the groove and is flush with the surface of the heat base, and the other end is bent at the side of the heat sink body. After being folded, it is inserted into the main body of the heat sink, and the bottom surface of the single LED light source is in contact with the heat pipe. One end of the heat pipe is connected to the heat base, and the other end is connected to the main body of the radiator, which not only facilitates the fixing of the heat base and the main body of the heat sink, but also quickly transfers the heat generated on the heat base to the main body of the heat sink for heat dissipation; single While the LED light source is installed on the base surface of the heat base, it is in close contact with the heat pipe. The heat pipe can transfer the heat generated by a single LED light source to the surrounding medium in a more timely manner, reducing the temperature in the automotive headlights. On the basis of improving the service life of lamps and ensuring that a single LED light source works at normal ambient temperature, combined with the optimized design of secondary optical components, LED automotive headlights can meet the light distribution performance requirements of lamps.

The secondary optical part includes a semi-cup reflector, a lens, and a light blocking sheet located directly above the single LED light source. At the opening, the lens is connected to the light blocking sheet through an auxiliary bracket, and faces the opening of the reflector for light to pass through. A single LED light-emitting source is powered by a general-purpose drive device and then emits light upwards. It is reflected by the half-cup reflector, and after the stray light is filtered by the light baffle, the effective light is irradiated to the area specified by the automobile regulations through the lens to achieve the light distribution of the automobile headlights. Performance requirements: In the utility model, the lens is not directly connected with the light blocking sheet, but it also includes an auxiliary bracket, which is first connected with the light blocking sheet on the end of the thermal base, and the lens is bonded by tight fit. It is assembled on the accessory bracket in the form of connection, which can effectively protect the lens from falling off.

Compared with the prior art, the utility model has the following advantages: the LED automobile headlight of the utility model adopts a single LED light source, so the structure is more reasonable, the assembly is more convenient, and the heat dissipation of the radiator makes the LED headlight It has good heat dissipation effect, long life, energy saving and environmental protection, and has good light distribution performance.

Description of drawings

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

Fig. 2 is a schematic diagram of the decomposition structure of the utility model;

Fig. 3 is a structural schematic diagram of the combined secondary optical part of the utility model;

Fig. 4 is the structural representation of radiator of the present utility model;

Figure 5 is a schematic cross-sectional view of the utility model;

Explanation of reference numerals: 1-single LED light source, 2-secondary optical part, 21-reflector, 211-wire groove, 22-lens, 23-light shielding sheet, 24-accessory bracket, 3-radiator, 31-radiator body, 32-insert-type laminations, 33-thermal base, 34-heat pipe, 35-groove, 4-drive device, 5. connecting wires, 6. mounting holes.

Detailed ways

The content of the present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Example:

Please refer to Fig. 1, Fig. 2 and Fig. 5, a kind of LED automobile headlamp includes a single LED light source 1, a driving device 4, and the driving device 4 is a commonly used device for driving the LED to work. 4. It is electrically connected to the single LED light source 1 through the connecting wire 5, and also includes a secondary optical part 2 and a radiator 3. The secondary optical part 2 is covered on the radiator 3. The single LED light source 1 It is arranged at the optical center in the secondary optical part 2 and on the top surface of the heat sink 3 .

Please refer to FIG. 4, the radiator 3 includes a radiator main body 31, an insert-type lamination 32 arranged on the side of the radiator main body 31, a thermal base 33 arranged on the top of the radiator main body 31, and a single LED light source. 1 is set on the thermal base 33. A plurality of mounting holes 6 are provided on the base surface and side surfaces of the thermal base 33, which are used to install a single LED light source 1, a reflector 21, a lens 22 and a light shield 23. On the thermal base 33 A groove 35 is opened, and a heat pipe 34 is also included. One end of the heat pipe 34 is placed in the groove 35 and is flush with the surface of the heat base 33 , and the other end is bent at the side of the heat sink body 31 and inserted into the heat sink. Inside the main body 31 , the above-mentioned single LED light source 1 is assembled with the base surface of the heat base 33 and is also in close contact with the heat pipe 34 .

Please refer to FIG. 3, the secondary optical part 2 includes a semi-cup-shaped reflector 21, a lens 22, and a light blocking sheet 23 located directly above the single LED light source 1. The light blocking sheet 23 is arranged on a thermal base. At the end of the seat 33 and the opening of the reflecting mirror 21 , the lens 22 is connected with the light blocking sheet 23 through the accessory bracket 24 and faces the opening of the reflecting mirror 21 . The installation positions of the reflector, the light blocking sheet and the lens are all installed according to the automobile light distribution standard, and a wire groove 211 is provided at the tail of the reflector 21. When the reflector 21 is covered directly above the single LED light source 1, the LED The connecting wire 5 of the light emitting source 1 is led out through the wire groove 211 and electrically connected to the driving device 4 .

The above detailed description is a specific description of the feasible embodiment of the utility model. This embodiment is not used to limit the patent scope of the utility model. Any equivalent implementation or change that does not deviate from the utility model shall be included in this case within the scope of the patent.

Claims (4)

1, a kind of LED car headlamp, it is characterized in that: comprise single LEDs light emitting source (1) and drive drive unit (4), secondary optics part (2), the radiator (3) that this LED light emitting source (1) is worked, this secondary optics part (2) covers on the described radiator (3), and described single LEDs light emitting source (1) is arranged on the end face of the interior photocentre place of secondary optics part (2), radiator (3).

2, LED car headlamp as claimed in claim 1, it is characterized in that: described radiator (3) comprises radiator body (31), be laid in the blade inserting lamination (32) of radiator body (31) side, be arranged on the hot radical seat (33) on radiator body (31) top, and described single LEDs light emitting source (1) is arranged on this hot radical seat (33).

3, LED car headlamp as claimed in claim 2, it is characterized in that: on described hot radical seat (33), offer groove (35), also include heat pipe (34), it is interior and concordant with described hot radical seat (33) surface that these heat pipe (34) one ends are placed in this groove (35), the other end inserts in the radiator body (31) in described radiator body (31) side bending back, and the bottom surface of described single LEDs light emitting source (1) contacts with described heat pipe (34).

4, LED car headlamp as claimed in claim 3, it is characterized in that: described secondary optics part (2) locates to be semi-calyciform speculum (21), lens (22) and light barrier (23) directly over including and being positioned at single LEDs light emitting source (1), described light barrier (23) is arranged at the end of described hot radical seat (33), the opening part of speculum (21), described lens (22) are connected with described light barrier (23) by accessory holder (24), and wear for light over against the opening of speculum (21) and to penetrate.

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