CN220870682U

CN220870682U - Full LED combined rear car lamp

Info

Publication number: CN220870682U
Application number: CN202322583751.8U
Authority: CN
Inventors: 卢经纬; 朱翔; 李冬林
Original assignee: Hubei Xiaogan Huazhong Lamp Co ltd
Current assignee: Hubei Xiaogan Huazhong Lamp Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-04-30
Anticipated expiration: 2033-09-21

Abstract

The utility model relates to a full LED combined rear car lamp which comprises a lens, a decorative frame, a lamp shell, an LED module, a heat dissipation plate, a wire harness assembly, waterproof breathable cloth, screws and a retro-reflector, wherein the two sides of the retro-reflector are respectively provided with a reversing lamp and a rear fog lamp. Light emitted by LED light sources on two circuit boards of the LED module is reflected by a reflecting bowl on the lamp shell and emitted forwards, so that the functions of a reversing lamp and a rear fog lamp are realized. In order to ensure the heat dissipation effect, the circuit board with larger heating value is coated with heat conduction silicone grease and is fixed with a heat dissipation plate, so that the problem of thermal runaway of the car lamp can be avoided even if the car lamp works for a long time. The car lamp has the advantages of simple structure, rich functions, small volume, light weight, fashionable modeling, low cost and the like, and has good market prospect.

Description

Full LED combined rear car lamp

Technical Field

The utility model relates to the technical field of car lamps, in particular to a full-LED combined car lamp.

Background

The rear car lights of vehicles generally comprise position lights, steering lights, brake lights, reversing lights, fog lights and the like, and each car light can be independently arranged, or car lights with different functions can be combined together, so that the obtained car lights are combined rear car lights, such as Chinese patent CN210345329U, CN209762935U and the like. The combined car lamp has the advantages of rich functions, small volume and the like, and can meet the modeling design of the whole car, so that the car lamp is more and more popular.

LEDs are a brand new light source, and are widely used in car lamps at present, and car lamps with LED light sources are increasingly popular with consumers. LEDs have many advantages, but there are also some disadvantages, such as the large heat generated when the LED works, and if the heat cannot be effectively conducted out in time in a limited enclosed space, the service life and safety of the vehicle lamp will be seriously affected, so the problem of heat dissipation becomes a serious problem in the LED vehicle lamp. The current common heat dissipation modes comprise fan heat dissipation and heat dissipation fin heat dissipation, wherein the former has a complex structure and high cost, and the latter is used independently and is required to solve the problems of insufficient heat dissipation efficiency and the like by means of widening, lengthening, thickening and the like.

The inventor group further develops a novel full-LED combined rear car lamp based on the existing various car lamp products (such as China patent CN 210454610U), integrates the functions of a rear fog lamp, a reversing lamp, a retro-reflector and the like into a lamp body, and better solves the heat dissipation problem of an LED light source by utilizing an aluminum substrate and heat dissipation silicone grease coating.

Disclosure of utility model

The utility model provides a full LED combined rear car lamp, which comprises a lens 1, a decorative frame 2, a lamp shell 3, an LED module 4 and a heat dissipation plate 5, wherein the lamp shell 3 is an assembly main body, the lens 1 and the decorative frame 2 are fixed on the outer side of the lamp shell 3, and the LED module 4 and the heat dissipation plate 5 are fixed on the back surface of the lamp shell 3; the decorative frame 2 is provided with a retro-reflector 9, the lamp housing 3 is provided with two groups of reflecting bowls, light emitted by the LED module 4 is reflected by different reflecting bowls and then emitted forward, the functions of a rear fog lamp and a reversing lamp are respectively realized, and the retro-reflector 9 reflects external light to realize a warning function.

Further, the LED module 4 includes two circuit boards, and each circuit board is provided with an LED light source.

Further, the retro-reflector is arranged in the middle of the decorative frame 2, and two circuit boards of the LED module 4 are respectively positioned at the left side and the right side of the retro-reflector 9.

Further, the two circuit boards of the LED module 4 are connected in parallel through the wire harness assembly 6 and then connected to a vehicle power supply or control circuit.

Further, the heat dissipation plate 5 is fixedly connected with the circuit board, and a heat conduction silicone grease layer is further arranged between the heat dissipation plate 5 and the circuit board.

Further, the number of the heat dissipation plates 5 is at least one. Generally, the power of the reversing light is smaller and the service time is short, and the power of the fog light is larger and the service time is long, so that the heat dissipation problem can be well solved only by arranging the metal heat dissipation plate on the circuit board corresponding to the fog light, but the metal heat dissipation plate can be arranged on both circuit boards for safety.

Further, the lamp housing 3 is also provided with ventilation holes, and waterproof ventilation cloth 7 is fixed on the ventilation holes.

Further, the outer surface of the all-LED combined car lamp is arc-shaped, and certain height difference exists at the left end and the right end.

The full LED combined rear car lamp provided by the utility model realizes the total 3 large functions of the reversing lamp, the rear fog lamp and the retro-reflector, all light sources adopt side-emitting LEDs, the heat dissipation problem of the LEDs is well solved by means of multiple safety measures such as metal heat dissipation plates and heat conduction silicone grease, the light attenuation caused by heat is ensured to be stably controlled within 20%, and the volume and thickness of the metal heat conduction plate can be greatly reduced by an external mounting mode, so that excessive space is not occupied or the weight of the whole lamp is not increased. Compared with the existing similar products, the combined car lamp has the advantages of simple structure, rich functions, small volume, light weight, fashionable modeling, low cost and the like, meets the requirements of regulations and host factories, and has good market prospect.

Drawings

FIG. 1 is an exploded view of a full LED combined vehicle lamp according to the present utility model;

FIG. 2 is a schematic front view of the assembled full LED vehicle lamp according to the present utility model;

FIG. 3 is a schematic perspective view of a full LED combined vehicle lamp according to the present utility model;

fig. 4 is a physical diagram of the full-LED combined vehicle lamp according to the present utility model.

The LED lamp comprises a 1-lens, a 2-decorative frame, a 3-lamp shell, a 4-LED module, a 5-radiating plate, a 6-wire harness assembly, 7-waterproof breathable cloth, 8-screws, a 9-retro-reflector, 10-reversing lamps and 11-rear fog lamps.

Detailed Description

In order to make the technical scheme and the beneficial effects of the present utility model fully understood by those skilled in the art, the following description is further made with reference to specific embodiments and drawings.

The whole LED combined rear car lamp shown in the figures 1-4 is in a cambered surface shape, is low on the left and high on the right, and sequentially comprises a reversing lamp area, a retro-reflector area and a rear fog lamp area from left to right, wherein the functions of the reversing lamp area, the retro-reflector area and the rear fog lamp area are mutually independent and do not interfere with each other. The middle retro-reflector mainly reflects external light, so that the problem of heat dissipation does not exist without a light source, and heat accumulation can be effectively avoided by arranging the reversing light and the rear fog light on the left side and the right side of the reversing light and the rear fog light, so that the local overheat risk is reduced, and the heat dissipation pressure is also reduced.

The full LED combined rear car lamp mainly comprises the following parts: lens 1, decoration frame 2, lamp body 3, LED module 4, heating panel 5, wire harness subassembly 6, waterproof ventilative cloth 7, screw 8, retro-reflector 9. The decorative frame 2 is made of plastic material, and a pattern surface with a certain length and width is formed at the middle position during injection molding, namely the retro-reflector 9. The decorative frame 2 and the lamp housing 3 are fixedly connected together through the screw 8, and the sub-assembly formed by the decorative frame and the lamp housing are sealed and fixed together by adopting a glue bonding or welding mode. The LED lamp comprises a lamp housing 3, a reflector 9, a wire harness assembly 6, a lamp housing 3, a reflector bowl, a metal reflector layer, a screw 8, a lamp housing 3 and a lamp-socket assembly, wherein the two circuit boards of the LED module 4 are fixedly connected with the lamp housing 3 respectively, LED light sources on the circuit boards face the reflector bowl of the lamp housing respectively, and the wire harness assembly 6 is connected with the circuit boards of the LED module 4 and supplies power to the circuit boards. The circuit board corresponding to the rear fog lamp 11 is coated with heat-conducting silicone grease, and then the heat-conducting silicone grease and the heat-radiating plate 5 made of metal materials are tightly fixed together by using screws 8, so that a heat-radiating assembly is formed. The back of the lamp housing 3 is also provided with an air vent and is adhered with waterproof and breathable cloth 7, so that the air pressure in the lamp housing is consistent, water cannot enter the lamp housing, and the environment adaptability and the service life of the lamp are ensured.

Through repeated tests, the inventor adopts 3 red LEDs with the power of 1W to realize the rear fog lamp function in a side reflection light emitting mode, and adopts 4 white LEDs with the power of 0.75W to realize the reversing lamp function in a side reflection light emitting mode. Considering that the rear fog lamp is generally long in starting time and urgent in heat dissipation requirement, the dual heat dissipation measures of the aluminum substrate and the heat conduction silicone grease are adopted to effectively dissipate heat, so that the light attenuation of the front fog lamp is ensured to be kept below 20% for a long time, and the design requirement of a host factory is met.

Claims

1. A full LED combination back car light, its characterized in that: the car lamp comprises a lens, a decorative frame, a lamp shell, an LED module and a heat dissipation plate, wherein the lamp shell is an assembly main body, the lens and the decorative frame are fixed on one side of the lamp shell, and the LED module and the heat dissipation plate are fixed on the other side of the lamp shell; the decorative frame is provided with a retro-reflector, the lamp housing is provided with a reflecting bowl, and light emitted by the LED module is reflected by different reflecting bowls and then emitted forward, so that the functions of a rear fog lamp and a reversing lamp are respectively realized.

2. The full LED combination rear vehicle lamp of claim 1, wherein: the LED module comprises two circuit boards, and an LED light source is arranged on each circuit board.

3. The full LED combination rear vehicle lamp of claim 2, wherein: the retro-reflector is arranged at the middle position of the decorative frame, and the two circuit boards of the LED module are respectively positioned at the left side and the right side of the retro-reflector.

4. The full LED combination rear vehicle lamp of claim 2, wherein: the two circuit boards of the LED module are connected in parallel through the wire harness assembly and then connected with a vehicle power supply or a control circuit.

5. The full LED combination rear vehicle lamp of claim 2, wherein: the heat dissipation plate is fixedly connected with the circuit board, and a heat conduction silicone grease layer is arranged between the heat dissipation plate and the circuit board.

6. The full LED combination rear vehicle lamp of claim 5, wherein: the number of the heat dissipation plates is at least one.

7. The full LED combination rear vehicle lamp of claim 1, wherein: the lamp shell is also provided with air holes, and waterproof and breathable cloth is fixed on the air holes.

8. The full LED combination rear vehicle lamp of claim 1, wherein: the outer surface of the car lamp is arc-shaped, and the left end and the right end have height differences.