Closed automobile headlamp with long service life

Abstract

The invention discloses a closed long-service-life automobile headlamp which comprises an automobile lamp body, a lampshade and a lamp cover and is characterized in that heat dissipation channels are formed in the lampshade and a fixed shell, and an annular channel is formed in the lampshade. External cooling air is pumped into the lower side heat dissipation channel through the air pump fixed to the rear side of the fixed shell, flows through the annular channel to absorb heat and then flows out of the upper side heat dissipation channel, and an efficient active airflow heat dissipation path is formed. And meanwhile, the automobile lamp body is axially fixed to the connecting block structure through a unique clamping base and is matched with a damping system composed of a telescopic rod, a spring and a buffering cavity and an annular air bag communicated with a heat dissipation channel, efficient and uniform heat dissipation is achieved, and meanwhile the sealing performance, stability and vibration resistance of the whole structure are guaranteed. The heat dissipation efficiency is remarkably improved, and the service life of the automobile lamp is effectively prolonged.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting, and more particularly to a sealed, long-life automotive headlight. Background Technology

[0002] As a core lighting component for safe vehicle operation, the performance and reliability of automotive headlights are of paramount importance. Currently, automotive headlights generally employ a closed or semi-closed structure to prevent dust and moisture intrusion and ensure the stability of the optical system. However, this closed structure also presents significant heat dissipation challenges. When headlights are operating, especially high-power LED or xenon lamps, they generate a large amount of heat. If this heat cannot be dissipated effectively and promptly, it will accumulate inside the lamp housing, causing the internal temperature to rise continuously. Excessive temperature accelerates the light decay of the LED chips or filaments, significantly shortening their lifespan; simultaneously, it can cause thermal aging, deformation, or cracking of plastic or coated components such as the lamp housing and reflectors, affecting the beam pattern and creating safety hazards.

[0003] Existing heat dissipation solutions mostly rely on passive cooling through heat sinks at the rear or sides of the lamp housing, or on vents in the lamp housing (but this sacrifices airtightness). Passive cooling methods have limited efficiency, especially in the confined space and high ambient temperature of the engine compartment, making it difficult to meet the continuous cooling needs of high-power headlights. Simple vent designs may introduce moisture and dirt. Therefore, how to efficiently and actively dissipate heat from the enclosed headlight interior without compromising its airtightness has become a key technical bottleneck in improving headlight lifespan and reliability. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art by proposing a closed-type long-life automotive headlight.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A closed-type long-life automotive headlight includes a headlight body, a lamp cover on the outside of the headlight body, a lamp cap on the outside of the lamp cover, a heat dissipation channel on the lamp cover, an annular channel on the inside of the lamp cover near the center, a fixed housing on the rear side of the lamp cover, the heat dissipation channel also being formed on the fixed housing, an air pump fixedly connected to the rear side of the fixed housing, the air pump can pump gas into the heat dissipation channel, the gas flows in from the lower heat dissipation channel, flows through the annular channel and then flows out from the upper heat dissipation channel.

[0006] In the aforementioned enclosed long-life automotive headlight, a first clamping seat is fixedly provided at the bottom of the headlight body, and a connecting block is fixedly connected to the back of the first clamping seat. The connecting block passes through the lamp cover and a second clamping seat is fixedly connected to its back. The first clamping seat and the second clamping seat slide and fit tightly against the front and rear surfaces of the lamp cover, respectively. There is a certain distance between the side of the connecting block and the side of the lamp cover, and a reserved cavity is formed between them.

[0007] In the aforementioned enclosed long-life automotive headlight, a lamp holder is fixedly connected to the rear side of the second clamping seat. A semi-circular arc-shaped support is provided on the upper and lower sides of the lamp holder. One end of a telescopic rod is fixedly provided on the outer surface of the arc-shaped support. The other end of the telescopic rod is fixedly connected to the inner side of the fixed housing. A spring is provided on the outer side of the telescopic rod.

[0008] In the aforementioned enclosed long-life automotive headlight, a heat dissipation channel is also provided inside the telescopic rod, and an annular airbag is provided between the lamp holder and the arc-shaped support. The heat dissipation channel and the annular airbag are connected vertically.

[0009] In the aforementioned enclosed long-life automotive headlight, a one-way valve is provided in the heat dissipation channel located on the upper side.

[0010] In the aforementioned enclosed long-life automotive headlight, the telescopic rod has a buffer cavity inside, which is used to buffer the internal gas when the telescopic rod retracts.

[0011] Compared with existing technologies, the advantages of this automotive headlight are: 1. A forced air circulation system is formed by heat dissipation channels, annular channels, and an air pump installed within the lamp cover and mounting housing. The air pump draws in external cooling air from the bottom, which flows through the annular channel surrounding the central area of ​​the lamp cover, absorbing the heat accumulated inside the lamp cover before being discharged from the top, creating a highly efficient and directional airflow cooling path. This active cooling method greatly improves heat dissipation efficiency, effectively reduces the operating temperature inside the lamp cover and the lamp source, fundamentally slows down the light decay and aging of the lamp source, and significantly extends the overall lifespan of the headlight. 2. The design of the first clamping seat, the connecting block and the second clamping seat, and the reserved cavity formed on the side of the connecting block, allow the vertical vibration between the headlight body and the lamp cover to be directly transmitted, which has a preliminary buffering effect and can extend the service life. 3. The cooling channel and the annular airbag in the lamp holder area are connected vertically, allowing airflow to target and cool the lamp holder and nearby critical areas. Simultaneously, the support and buffer mechanism, composed of a telescopic rod and springs, effectively absorbs and cushions vibrations and impacts from vehicle operation, protecting the lamp source and internal structure. The buffer cavity inside the telescopic rod further enhances the buffering effect. The one-way valve in the upper cooling channel ensures unidirectional airflow, preventing hot air backflow and optimizing cooling efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a closed-type long-life automotive headlight proposed in this invention; Figure 2 for Figure 1 Enlarged view of the structure of part A in the middle; Figure 3 for Figure 1 Enlarged view of the structure of section B; Figure 4 for Figure 1 Enlarged view of the structure of section C in the middle; Figure 5 This is a cross-sectional view of the lamp holder to the curved support.

[0013] In the diagram: 11. Headlight body; 2. Lamp cover; 3. Lamp cap; 4. First clamping seat; 5. Second clamping seat; 6. Connecting block; 7. Heat dissipation channel; 8. One-way valve; 9. Spring; 10. Annular airbag; 11. Buffer cavity; 12. Telescopic rod; 13. Reserved cavity; 14. Lamp holder; 15. Arc-shaped support; 16. Annular channel; 17. Fixed housing; 18. Air pump. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0015] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0016] Reference Figure 1-5 A closed-type, long-life automotive headlight comprises a headlight body 1, a lamp cover 2, and a lamp cap 3, forming the main exterior structure. The core heat dissipation and support structure is integrated internally.

[0017] The lamp cover 2 and the rear fixed housing 17 have interconnected heat dissipation channels 7. Near the light-emitting center, the lamp cover 2 also has an internal annular channel 16. A miniature air pump 18 is fixed to the rear of the fixed housing 17, with its outlet connected to the inlet of the lower heat dissipation channel 7. When the headlight is on, the air pump 18 starts, pumping relatively cool external air into the lower heat dissipation channel 7. The airflow then enters the annular channel 16, where it exchanges heat with the walls that absorb heat from inside the lamp cover 2, thus carrying away heat. The heated airflow continues along its path and is eventually discharged through the upper heat dissipation channel 7. A one-way valve 8 is installed in the upper heat dissipation channel 7 to ensure unidirectional airflow and prevent hot air backflow.

[0018] The headlight body 1 is securely connected to the lamp cover 2 via a first clamping seat 4 at its bottom, a connecting block 6, and a second clamping seat 5 at its rear. The first clamping seat 4 and the second clamping seat 5 are respectively in close contact with the front and rear of the lamp cover 2. The connecting block 6 passes through a through hole on the lamp cover 2, and a gap is left between its side and the inner wall of the through hole, forming a reserved cavity 13. This reserved cavity 13 provides space for relative displacement between the connecting block 6 and the lamp cover 2, so that the vibration of the vehicle body is not directly transmitted to the headlight body 1, reducing vibration damage and extending service life.

[0019] The second clamping seat 5 is connected to the lamp holder 14 for electrical connection of the lamp source. Semi-circular arc-shaped supports 15 are provided above and below the lamp holder 14. Each arc-shaped support 15 is connected to the inner side of the fixed housing 17 via a telescopic rod 12. A spring 9 is fitted over the telescopic rod 12, forming an elastic buffer system to offset the impact of vehicle vibrations on the lamp source. Notably, a heat dissipation channel 7 is also provided inside the telescopic rod 12, which is connected to the main heat dissipation channel 7 system. Furthermore, an annular airbag 10 is provided between the lamp holder 14 and the arc-shaped support 15, with its upper and lower ends connected to the corresponding heat dissipation channels 7 inside the telescopic rod 12. Thus, when the cooling airflow passes through the telescopic rod 12, it can cool the area of ​​the annular airbag 10, thereby providing more direct and uniform heat dissipation to the heat-generating core—the lamp holder 14.

[0020] Inside the piston section of the telescopic rod 12, there is also a buffer cavity 11. When the telescopic rod 12 is compressed, the gas inside it is forced into the buffer cavity 11, and the compressibility of the gas provides additional buffer damping, making the shock absorption process smoother.

[0021] The working process of this invention is as follows: After the vehicle starts the headlights, the air pump 18 starts simultaneously. External air is forced into the cooling system and flows along the path of "lower cooling channel 7 → annular channel 16 and internal channel of telescopic rod 12 → (cooling annular airbag 10) → upper cooling channel 7 (via one-way valve 8)," continuously carrying the heat generated inside the lamp cover 2 and near the lamp holder 14 to the outside. At the same time, the bumps and vibrations during vehicle operation are transmitted through the fixed housing 17 to the buffer mechanism composed of telescopic rod 12 and spring 9, which are effectively absorbed and attenuated, ensuring the stable operation of the headlight body 1 and the internal light source.

[0022] To further clarify, the aforementioned fixed connection should be interpreted broadly unless otherwise explicitly specified and limited. For example, it may be welding, gluing, or integral molding, or other conventional methods well known to those skilled in the art.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sealed, long-life automotive headlight, comprising a headlight body (1), wherein a lamp cover (2) is provided on the outside of the headlight body (1), and a lamp cap (3) is provided on the outside of the lamp cover (2), characterized in that: The lampshade (2) has a heat dissipation channel (7). The lampshade (2) has an annular channel (16) inside near the center. The lampshade (2) has a fixed outer shell (17) fixed on the rear side. The heat dissipation channel (7) is also opened on the fixed outer shell (17). An air pump (18) is fixedly connected to the rear side of the fixed outer shell (17). The air pump (18) can pump gas into the heat dissipation channel (7). The gas flows in from the lower heat dissipation channel (7), flows through the annular channel (16), and flows out from the upper heat dissipation channel (7).

2. A closed long-life automotive headlamp as claimed in claim 1, characterized in that: The bottom of the headlight body (1) is fixedly provided with a first clamping seat (4), and a connecting block (6) is fixedly connected to the back of the first clamping seat (4). The connecting block (6) passes through the lamp cover (2) and a second clamping seat (5) is fixedly connected to the back. The first clamping seat (4) and the second clamping seat (5) slide and adhere to the front and rear surfaces of the lamp cover (2) respectively. There is a certain distance between the side of the connecting block (6) and the side of the lamp cover (2), and a reserved cavity (13) is formed between them.

3. A closed long-life automotive headlamp as claimed in claim 2, characterized in that: The second clamping seat (5) is fixedly connected to the rear side of the lamp holder (14). The lamp holder (14) is provided with a semi-circular arc support (15) on the upper and lower sides. One end of the telescopic rod (12) is fixedly provided on the outer surface of the arc support (15). The other end of the telescopic rod (12) is fixedly connected to the inner side of the fixed shell (17). A spring (9) is provided on the outer side of the telescopic rod (12).

4. A closed long-life automotive headlamp as claimed in claim 3, characterized in that: The telescopic rod (12) also has a heat dissipation channel (7) inside, and an annular airbag (10) is provided between the lamp holder (14) and the arc support (15). The heat dissipation channel (7) and the annular airbag (10) are connected vertically.

5. A closed long-life automotive headlamp as claimed in claim 4, characterized in that: A one-way valve (8) is provided in the heat dissipation channel (7) located on the upper side.

6. A closed long-life automotive headlamp as claimed in claim 3, wherein: The telescopic rod (12) has a buffer cavity (11) inside, which is used to buffer the gas inside when the telescopic rod (12) retracts.

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