CN205504777U - LED automobile lamp - Google Patents

Abstract

The utility model relates to an LED automobile lamp, which comprises a heat conductor, a heat sink, an LED light source, a driving circuit and a pulse width modulation controller. The heat conductor has a mounting groove for installing the LED light source. connected, the drive circuit is electrically connected to the pulse width modulation controller, the pulse width modulation controller is used to adjust the output voltage of the drive circuit, the heat sink is sleeved on the periphery of the heat conductor, and the heat sink is located in the installation groove Above: there is a cavity between the top surface of the heat conductor and the mounting groove, and a first through hole communicating with the cavity is opened on the side wall of the mounting groove close to the cavity. The LED automobile lamp of the utility model has good heat dissipation, and can be adjusted by changing the magnitude of the current flowing through the LED through a pulse width modulation controller, so that the brightness of the LED automobile lamp is adjustable, which satisfies the need for people to use the automobile lamp for lighting. Different needs of brightness.

Description

A kind of LED car lamp

technical field

The utility model relates to a lamp for automobile lighting, in particular to an LED automobile lamp.

Background technique

Automobile lights are various traffic lights installed on automobiles to ensure safe driving. It is an important part in automobile production. Although its technical content is relatively low compared with engine or electrical control parts, its role is indispensable Small vision, has the function of lighting and transmitting signals.

LED light sources have the characteristics of long life, no pollution and high light efficiency, and are also used in car lights to form LED car lights. However, the LED light source will generate heat. If the heat generated by the LED light source cannot be dissipated in time, the temperature in the lamp body will rise, which will not only accelerate the aging of the LED lamp, shorten its service life, and even cause the LED to burn out in severe cases. Moreover, the brightness of existing LED car lights cannot be adjusted. When people play outside, they cannot meet people's requirements for brightness when using car lights for lighting.

Utility model content

The purpose of the utility model is to provide an LED automobile lamp, which can solve the problems of adjusting the brightness of the automobile lamp and heat dissipation of the automobile lamp.

In order to achieve the above object, the technical scheme adopted in the utility model is as follows:

An LED automotive lamp, comprising a heat conductor, a heat sink, an LED light source, a drive circuit and a pulse width modulation controller, the heat conductor has a mounting groove for installing an LED light source, the LED light source is electrically connected to the drive circuit, and the The drive circuit is electrically connected to an external power supply through a pulse width modulation controller, the pulse width modulation controller is used to adjust the output voltage of the drive circuit, the heat sink is sleeved on the periphery of the heat conductor, and the heat sink is located in the installation groove above; there is a cavity between the top surface of the heat conductor and the mounting groove, and a first through hole communicating with the cavity is opened on the side wall of the mounting groove close to the cavity, and the first through hole is used for The heat generated by the LED light source is transferred through the cavity to the heat sink.

Preferably, a fixing device is further included, the fixing device is sleeved on the heat conductor, and the upper end of the fixing device is fixedly installed with the heat sink. What technical problems can be further solved or what technical effects can be achieved. The fixed installation problem of the cooling seat can be further solved.

Preferably, a waterproof ring is also included, and the waterproof ring is installed between the fixing device and the heat dissipation seat. The waterproof problem at the LED light source can be further solved.

Preferably, the heat dissipation seat includes a heat dissipation cylinder, a heat dissipation fin, a heat dissipation side plate, a heat dissipation top plate and a heat dissipation bottom plate, one end of the heat dissipation side plate is fixed on the heat dissipation bottom plate, and the other end of the heat dissipation side plate is fixed on the heat dissipation top plate, The heat dissipation side plate, the heat dissipation bottom plate and the heat dissipation top plate surround and form a section, and the heat dissipation fins are evenly installed on the circumference of the heat dissipation cylinder along the axial direction, and the heat dissipation fins are located in the section. It can further solve the problem of heat dissipation.

Preferably, the number of the heat dissipation side plates is two, and the two heat dissipation side plates are arranged opposite to each other. It can further solve the problem of heat dissipation.

Preferably, annular bumps are uniformly arranged on the heat dissipation top plate. It can further solve the problem of heat dissipation.

Preferably, the surface of the heat sink is coated with a nano-coating. It can further solve the problem of heat dissipation.

Preferably, the number of the first through holes is two. It can further solve the problem of heat dissipation.

Preferably, the top surface of the heat conductor is further provided with a second through hole communicating with the cavity. It can further solve the problem of heat dissipation.

The utility model has the following beneficial effects:

The heat sink of the utility model can replace the fan for heat dissipation under the condition of rated power. After the lamp is lit, the heat is conducted to the heat dissipation tail, and through air convection, the hot air rises, the cold air sinks, and the temperature is continuously reduced. Black nano-coating enhances radiant heat dissipation.

Moreover, the lamp holder of the LED automobile lamp of the present invention is provided with a control unit for controlling the luminous brightness of the LED light source, and the pulse width modulation controller is used to change the current flowing through the LED for adjustment, so that the brightness of the LED automobile lamp can be adjusted. Tonality, to meet people's different needs for brightness when using car lights for lighting.

Description of drawings

Fig. 1 is the structural diagram of a kind of LED automobile lamp of the present utility model;

Fig. 2 is the view of direction A in Fig. 1;

Fig. 3 is the view of B direction in Fig. 1;

Fig. 4 is a schematic block diagram of a circuit of an LED automobile lamp of the present invention.

Reference signs: 1, heat conductor; 2, fixed device; 3, heat dissipation seat; 31, heat dissipation cylinder; 32, heat dissipation fin; 33, heat dissipation bottom plate; 34, heat dissipation top plate; 35, heat dissipation side plate; 36, annular bump ; 4. LED light source; 5. First through hole; 6. Second through hole; 7. Waterproof ring; 8. Reflective surface.

detailed description

Below, in conjunction with accompanying drawing and specific embodiment, the utility model is described further:

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the utility model provides an LED automobile lamp with a heat dissipation device, including a heat conductor 1, a heat dissipation seat 3, a fixing device 2, a waterproof ring 7, and an oblique reflective surface 8 and the LED light source 4, the heat sink 3 includes a heat sink 31, a heat sink 32, a heat sink side plate 35, a heat sink top plate 34 and a heat sink bottom plate 33, and the heat sink 32 is evenly installed on the heat sink 31 along the axial direction, And the heat dissipation fins 32 are located between the heat dissipation top plate 34 and the heat dissipation bottom plate 33 , one end of the heat dissipation side plate 35 is fixed on the heat dissipation bottom plate 33 , and the other end of the heat dissipation side plate 35 is fixed on the heat dissipation top plate 34 . The number of the heat dissipation side plates 35 is two, and the two heat dissipation side plates 35 are arranged opposite to each other. Annular protrusions 36 are uniformly arranged on the heat dissipation top plate 34 . The function of the annular protrusion 36 is to increase the heat dissipation area to achieve better heat dissipation. The surface of the heat sink 3 is coated with a nano-coating.

The LED light source 4 is fixedly installed on one end of the heat conductor 1, and the LED light source 4 is electrically connected to a driving circuit through a wire, and the driving circuit is electrically connected to a pulse width modulation controller, and the pulse width modulation controller is used for Regulates the output voltage of the drive circuit. The drive circuit provides DC power for the LED light source 4 to drive the LED light source 4 to emit light. The pulse modulation controller is electrically connected to the external power supply and the drive circuit respectively. 4, the luminous brightness of the LED light source 4 also changes accordingly, so that the brightness of the LED car light can be adjusted to meet people's needs for the brightness of the car light.

The top surface of the heat conductor 1 is provided with a second through hole 6, the second through hole 6 communicates with the cavity of the heat conductor 1, the heat sink 3 is set on the top of the heat conductor 1, and the inner wall of the heat sink 3 Connecting with the outer wall of the heat conductor 1 , the fixing device 2 is sleeved on the heat conductor 1 , and the upper end of the fixing device 2 is fixedly installed with the heat sink 3 . The waterproof ring 7 is installed between the fixing device 2 and the heat sink 3 . And the top of the heat conductor 1 has a cavity, that is, there is a cavity between the top surface of the heat conductor 1 and the installation groove, and the bottom of the cavity is provided with a first through hole 5, the first through hole The number of 5 is two. The first through hole 5 is used to transfer the heat generated by the LED light source 4 to the heat sink 3 through the first through hole 5 , and then dissipate the heat through the heat sink 3 . The oblique reflective surface 8 is located in the installation groove, and is located on the slopes at the upper and lower ends of the installation groove. The light produced by the LED light source 4 is gathered by the inclined reflective surface 8, and the light is reflected onto the large reflective cup on the car, and the light reflected from the large reflective cup is refracted to the road surface again, forming a cut-off line of illumination, which can make the car light The lighting is more concentrated, which is conducive to driving safety.

For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and ideas described above, and all these changes and modifications should fall within the protection scope of the claims of the present invention .

Claims (9)

1. a LED automobile light fixture, it is characterised in that include heat carrier, radiating seat, LED Light source, drive circuit and PDM keyer, heat carrier has one for installing LED light source Mounting groove, described LED light source and drive circuit be electrically connected with, and described drive circuit passes through arteries and veins Wide modulation controller and an external power source are electrically connected with, and described PDM keyer is used for regulating The output voltage of drive circuit, described radiating seat is set in the periphery of heat carrier, and heat radiation seat Top in mounting groove；There is between end face and the mounting groove of described heat carrier a cavity, install Groove offers the first through hole connected with cavity on a sidewall of described cavity, and described first Through hole is for passing through cavity at radiating seat by the heat that LED light source produces.

2. LED automobile light fixture as claimed in claim 1, it is characterised in that also include solid Determining device, described immobilising device is sleeved on heat carrier, and described immobilising device upper end and heat radiation Seat fixed installation.

3. LED automobile light fixture as claimed in claim 2, it is characterised in that also include preventing Hydrosphere, described water proof ring is arranged between immobilising device and radiating seat.

4. LED automobile light fixture as claimed in claim 1, it is characterised in that described heat radiation Seat includes heat-dissipating cylinder, fin, side radiating plate-fin, radiating top plate and radiating bottom plate, described heat radiation Side plate one end is fixed on radiating bottom plate, and the other end of described side radiating plate-fin is fixed on radiating top plate On, this side radiating plate-fin, radiating bottom plate and radiating top plate enclose and connect formation one interval, described fin The most uniformly it is arranged on the border of heat-dissipating cylinder, and described fin is positioned at described interval.

5. LED automobile light fixture as claimed in claim 4, it is characterised in that described heat radiation The quantity of side plate is two pieces, and two pieces of side radiating plate-fins set with the axis of heat-dissipating cylinder for axis of symmetry symmetry Put.

6. LED automobile light fixture as claimed in claim 4, it is characterised in that described heat radiation Annular lug it is evenly arranged with on top board.

7. LED automobile light fixture as claimed in claim 1, it is characterised in that described radiating seat Surface scribble nano coating.

8. LED automobile light fixture as claimed in claim 1, it is characterised in that described first The quantity of through hole is two.

9. LED automobile light fixture as claimed in claim 1, it is characterised in that described heat conduction The end face of body is additionally provided with the second through hole connected with cavity.