An automotive headlamp

Abstract

The utility model relates to an automobile headlight, including heat conduction block, the heat dissipation unit that sets up on its heat dissipation is provided to heat conduction block, the one side surface of heat conduction block is provided with headlamp circuit board and heat conduction rod, two adjacent sides of headlamp circuit board, its one is connected with heat conduction block, and the other is connected with heat conduction rod, and the heat conduction rod of this automobile headlight, headlamp circuit board and heat conduction block are integrated together, and heat conduction rod and headlamp circuit board simultaneously conduct heat to heat conduction block, and the ability of heat conduction is strengthened, and the contact surface is infinitely close simultaneously, and three integrated together make, and heat can extremely smoothly conduct, and then enhance the heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of vehicle lights, and more specifically, to a car headlight. Background Technology

[0002] Car headlights, also known as automotive headlights, are the eyes of a car. They not only affect the appearance of the driver but are also closely related to safe driving at night or in bad weather conditions. Currently, LED light sources are used in car headlights. However, due to the concentrated heat source of LEDs and their inability to withstand high temperatures, the brightness and lifespan of current LED headlights have been limited.

[0003] Existing automotive headlights, such as the LED automotive headlight disclosed in a patent document (application number: 201420735601.2), use an LED lamp bracket to support an LED lamp panel and conduct heat from the LED lamp panel to a heat sink, which is then cooled by a cooling fan. However, the LED lamp panel and the heat sink are separate, and the LED lamp bracket is simply inserted into the center of the heat sink. There are a large number of tiny air gaps between the contact surfaces. Air has a much lower thermal conductivity than metal, and these gaps create huge contact thermal resistance, becoming a "bottleneck" for heat conduction. This results in insufficient heat dissipation in the automotive headlight, which in turn affects the use of the lamp. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, a car headlight is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a car headlight, including a heat-conducting block, on which a heat dissipation unit is provided for heat dissipation, and a headlight circuit board and a heat-conducting rod are provided on one side surface of the heat-conducting block, and one of the two adjacent sides of the headlight circuit board is connected to the heat-conducting block and the other is connected to the heat-conducting rod.

[0006] Preferably, two heat-conducting rods are provided, and the two heat-conducting rods are respectively provided on both sides of the headlamp circuit board.

[0007] Preferably, the heat-conducting rod is connected to three sides of the headlamp circuit board, one side of the headlamp circuit board is connected to the heat-conducting block, the other three sides of the headlamp circuit board are connected to the heat-conducting rod, and both ends of the heat-conducting rod are connected to the heat-conducting block.

[0008] Preferably, the heat-conducting rod is a copper tube.

[0009] Preferably, the headlamp circuit board is a double-sided copper-based circuit board or a double-sided aluminum-based circuit board.

[0010] Preferably, the heat dissipation unit includes multiple heat sinks, which are spaced apart on the sidewall of the heat-conducting block, and the multiple heat sinks form an air duct with airflow from top to bottom.

[0011] Preferably, the top surface of the heat-conducting block is provided with a fixing member for auxiliary fixing of the headlamp circuit board and the heat-conducting rod, and the fixing member is provided with a through hole for the headlamp circuit board and the heat-conducting rod to pass through.

[0012] Preferably, the automotive headlight further includes a drive mechanism and two protective shells for protecting the headlight circuit board and the heat-conducting block. The two protective shells are detachably connected. The drive mechanism passes through the protective shell and is electrically connected to the headlight circuit board. The heat-conducting block is provided with a clearance notch to avoid the drive mechanism. The protective shell is provided with a light-emitting hole. A heat dissipation fan mechanism is provided inside the protective shell.

[0013] Preferably, the protective shell is provided with a light-shielding element to prevent glare at the position of the light-emitting hole.

[0014] Preferably, the protective shell is fitted with a retaining ring, and a sealing ring is provided on the bottom surface of the retaining ring.

[0015] The beneficial effects of this utility model are as follows: the heat-conducting rod, headlight circuit board and heat-conducting block of this car headlight are integrated together. The heat-conducting rod and headlight circuit board simultaneously conduct heat to the heat-conducting block, which enhances the heat conduction capability. At the same time, the integration of the three together makes the contact surfaces infinitely close, and the heat can be conducted extremely smoothly, thereby enhancing the heat dissipation effect. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model; Figure 3 This is an exploded structural diagram of Embodiment 2 of this utility model. Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.

[0017] Reference numerals: 1 Protective shell, 10 Light emission hole, 11 Heat dissipation hole, 12 Air outlet, 2 Heat conduction block, 20 Heat conduction rod, 21 Heat sink, 22 Clearance notch, 3 Fixing component, 4 Headlamp circuit board, 5 Light shield, 6 Drive mechanism, 7 Fan mechanism, 8 Snap ring, 9 Sealing ring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In addition, the directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. The directional terms are used to better and more clearly explain and understand this utility model, and are not intended to indicate or imply the necessary orientation of this utility model. Therefore, they should not be construed as limitations on this utility model.

[0019] Example 1 Examples of embodiments of this utility model Figures 1 to 4 As shown, a car headlight includes a heat-conducting block 2, on which a heat dissipation unit is provided for heat dissipation. The heat dissipation unit includes multiple heat sinks 21, which are spaced apart on the sidewalls of the heat-conducting block 2. The multiple heat sinks 21 form an air duct with airflow from top to bottom. Preferably, the heat-conducting block 2 has a cuboid structure, and multiple heat sinks 21 are equally spaced on both the front and rear sidewalls of the heat-conducting block 2. The heat sinks 21 and the heat-conducting block 2 are integrally formed to form a cylindrical structure. The heat dissipation unit can also provide cooling for multiple... A heat sink, such as a semiconductor cooling chip, is used to dissipate heat from the heat-conducting block 2. A headlamp circuit board 4 and a heat-conducting rod 20 are disposed on one side surface of the heat-conducting block 2. The headlamp circuit board 4 and the heat-conducting rod 20 are vertically disposed on the upper surface of the heat-conducting block 2. One of the two adjacent sides of the headlamp circuit board 4 is connected to the heat-conducting block 2, and the other is connected to the heat-conducting rod 20. Preferably, the heat-conducting rod 20 and the headlamp circuit board 4 are soldered together with solder paste, and thermally conductive silicone is filled in the gap between the heat-conducting rod 20 and the connection between the headlamp circuit board 4 and the heat-conducting block 2.

[0020] The heat generated by the headlight circuit board is conducted to the heat-conducting block 2 through the heat-conducting rod 20, and the heat dissipation area of ​​the heat-conducting block 2 is increased by the heat sink 21. The heat-conducting rod 20, the headlight circuit board and the heat-conducting block 2 of this car headlight are integrated together. The heat-conducting rod 20 and the headlight circuit board 4 conduct heat to the heat-conducting block 2 at the same time, which enhances the heat conduction capability. At the same time, the integration of the three together makes the contact surface infinitely close, and the heat can be conducted extremely smoothly, thereby enhancing the heat dissipation effect.

[0021] Further improvements, such as Figure 1 and Figure 2As shown, there are two heat-conducting rods 20, which are respectively arranged on opposite sides of the light-emitting mechanism. The heat at both ends of the light-emitting mechanism is conducted simultaneously through the two heat-conducting rods 20, thereby improving the efficiency of heat conduction.

[0022] Further improvements, such as Figure 1 and Figure 2 As shown, the heat-conducting rod 20 is connected to three sides of the headlamp circuit board 4. The heat-conducting rod 20 has an n-shaped structure. At this time, the top of the headlamp circuit board 4 has a semi-circular structure, or the top of the heat-conducting rod 20 is a straight copper tube extending in the left and right direction. At this time, the edge of the top of the headlamp circuit board 4 is a straight line extending in the left and right direction. One side of the headlamp circuit board 4 is connected to the heat-conducting block 2, and the other three sides of the headlamp circuit board 4 are connected to the heat-conducting rod 20. That is, the top side and the left and right sides of the headlamp circuit board 4 are all connected to the heat-conducting rod 20. Both ends of the heat-conducting rod 20 are connected to the heat-conducting block 2, which further improves the efficiency of heat conduction.

[0023] Further improvements, such as Figure 1 and Figure 2 As shown, the heat-conducting rod 20 is a copper tube, and the material of the heat-conducting rod 20 is copper with good thermal conductivity. Preferably, the heat-conducting rod 20 is made of, but is not limited to, copper, aluminum, aluminum nitride ceramic, graphene or composite materials thereof.

[0024] As a further improvement, the headlamp circuit board 4 is a double-sided copper-based circuit board or a double-sided aluminum-based circuit board, thereby ensuring the thermal conductivity of the headlamp circuit board 4.

[0025] Further improvements, such as Figure 1 and Figure 2As shown, the car headlight also includes a drive mechanism 6 and two protective shells 1 protecting the headlight circuit board 4 and the heat conduction block 2. Preferably, the protective shell 1 is made of aluminum alloy, which has high heat dissipation capacity and low cost. The two protective shells 1 are detachably connected. The upper ends of the two protective shells 1 are respectively provided with a first countersunk through hole and a first threaded hole. The first countersunk through hole is located near the top surface of the front side of the corresponding protective shell 1. The lower ends of the two protective shells 1 are respectively provided with a second countersunk through hole and a second threaded hole. The second countersunk through hole is located at the lower end of the corresponding protective shell 1 and above the heat sink 21. Preferably, there are two second countersunk through holes and two second threaded holes. The two second countersunk through holes are located on the left and right sides of the corresponding protective shell 1, and the two second threaded holes are located on the left and right sides of the corresponding protective shell 1. Corresponding to the concentric position of the second countersunk through hole, the driving mechanism 6 passes through the protective shell 1 and is electrically connected to the headlamp circuit board 4. The heat-conducting block 2 is provided with a clearance notch 22 to avoid the driving mechanism 6. The driving mechanism includes an LED driver. One end of the LED driver is provided with a first wire that is inserted into the protective shell 1 and electrically connected to the headlamp circuit board 4. The outer wall of the protective shell 1 is provided with a guide hole opposite to the heat-conducting block 2. The first wire passes through the guide hole and enters the clearance notch 22 and is electrically connected to the headlamp circuit board 4. The end of the LED driver away from the protective shell 1 is provided with a second wire and a plug in sequence. The plug is either a two-pin plug or a three-pin plug. In this embodiment, the plug is a two-pin plug. The protective shell 1 is provided with a light-emitting hole 10. A heat dissipation fan mechanism 7 is provided inside the protective shell 1.

[0026] Further improvements, such as Figure 1 and Figure 2 As shown, the fan mechanism 7 includes a cooling fan, which is located inside the protective shell 1 below the heat-conducting block 2. The protective shell 1 has an air outlet 12 located below the cooling fan. The two protective shells 1 constitute a first cavity that protects the headlamp circuit board 4 and the heat-conducting rod 20 and a second cavity that protects the heat-conducting block 2 and the cooling fan. The protective shell 1 has a heat dissipation hole 11 located above the heat sink 21 on the second cavity. The cooling fan works with the air duct to improve heat dissipation efficiency.

[0027] Further improvements, such as Figure 1 and Figure 2 As shown, a retaining ring 9 is fitted on the protective shell 1, and a sealing ring 90 is provided on the bottom surface of the retaining ring 9. The retaining ring 9 is connected to the protective shell 1 at a position above the second countersunk through hole 5. The retaining ring 9 blocks the clutter inside the car, and at the same time, the retaining ring 9 works with the sealing ring 90 to waterproof and prevent external water from entering the car interior from the position of the car headlight.

[0028] Example 2 Further improvements, such as Figure 3 and Figure 4 As shown, a fixing member 22 is provided on the top surface of the heat-conducting block 2 to assist in fixing the headlamp circuit board and the heat-conducting rod 20. The fixing member 22 is provided with a through hole for the headlamp circuit board and the heat-conducting rod 20 to pass through. The fixing member 22 further fixes the headlamp circuit board and the heat-conducting rod 20 to prevent loosening.

[0029] Further improvements, such as Figure 3 and Figure 4 As shown, the protective shell 1 is provided with a light shield 6 at the position of the light outlet 11 to prevent glare.

[0030] Further improvements, such as Figure 3 and Figure 4 As shown in the figure, the plug in this embodiment 2 is a three-pin plug.

[0031] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A car headlight, characterized in that, It includes a heat-conducting block, on which a heat dissipation unit is provided for dissipating heat; a headlamp circuit board and a heat-conducting rod are provided on one side surface of the heat-conducting block; one of the two adjacent sides of the headlamp circuit board is connected to the heat-conducting block, and the other is connected to the heat-conducting rod.

2. The automotive headlight according to claim 1, characterized in that, Two heat-conducting rods are provided; the two heat-conducting rods are respectively located on both sides of the headlamp circuit board.

3. A car headlight according to claim 1, characterized in that, The heat-conducting rod is connected to three sides of the headlamp circuit board; one side of the headlamp circuit board is connected to the heat-conducting block; the other three sides of the headlamp circuit board are connected to the heat-conducting rod; and both ends of the heat-conducting rod are connected to the heat-conducting block.

4. A car headlight according to claim 1, characterized in that, The heat-conducting rod is a copper tube.

5. A car headlight according to claim 1, characterized in that, The headlamp circuit board is a double-sided copper-based circuit board or a double-sided aluminum-based circuit board.

6. A car headlight according to claim 1, characterized in that, The heat dissipation unit includes multiple heat sinks; the multiple heat sinks are arranged at intervals on the side wall of the heat-conducting block; the multiple heat sinks form an air duct with air outlets at the top and bottom.

7. A car headlight according to claim 1, characterized in that, The top surface of the heat-conducting block is provided with a fixing component for auxiliary fixing of the headlamp circuit board and the heat-conducting rod; the fixing component is provided with a through hole for the headlamp circuit board and the heat-conducting rod to pass through.

8. A car headlight according to claim 1, characterized in that, The automotive headlight also includes a drive mechanism and two protective shells for protecting the headlight circuit board and the heat-conducting block; the two protective shells are detachably connected; the drive mechanism passes through the protective shell and is electrically connected to the headlight circuit board; the heat-conducting block is provided with a clearance notch to avoid the drive mechanism; the protective shell is provided with a light-emitting hole; and a heat dissipation fan mechanism is provided inside the protective shell.

9. A car headlight according to claim 8, characterized in that, The protective shell is equipped with a light-shielding element to prevent glare at the position of the light outlet.

10. A car headlight according to claim 8, characterized in that, The two protective shells are fitted with retaining rings; a sealing ring is provided on the bottom surface of the retaining rings.

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