Vehicle-mounted USB charger

Abstract

The utility model discloses a vehicle-mounted USB charger which comprises a front shell and a rear shell detachably connected with the front shell through a buckle, PCBA boards are installed in the front shell and the rear shell, cooling fins are installed on the front shell and the rear shell and located above the PCBA boards, LED lamps used for light prompt are installed on the PCBA boards, and the PCBA boards are connected with the rear shell through buckles. And a light guide piece for improving the light distribution uniformity of the LED lamp is arranged between the PCBA board and the front shell. According to the utility model, the lighting effect of the charging prompt scale of the vehicle-mounted USB charger is effectively improved, uniform and soft light can be conveniently provided at night or in a low-light environment, the recognition degree and the visual comfort degree of a user are greatly improved, in addition, a high-efficiency heat dissipation effect is achieved, the performance stability of the charger is improved, and the service life of the charger is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of USB chargers, in particular to a vehicle-mounted USB charger. Background Art

[0002] A car USB charger has become an indispensable accessory in modern vehicles. However, the existing car USB charger has problems such as uneven brightness and low recognition in terms of sign lighting, especially at night or in low light environments, which causes many inconveniences to users, from visual discomfort, positioning difficulties to safety risks, which will affect the user experience. Therefore, it is self-evident to design a car USB interface with uniform and soft light indication, which can greatly improve the convenience and safety of users and enhance the aesthetics and practicality of the product. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a car USB charger to solve the problem in the above background technology that the car USB charger is difficult to align and plug in when used at night or in low light environments, affecting the user experience.

[0004] To achieve the above object, the utility model provides the following technical solution: a vehicle-mounted USB charger, comprising a front housing and a rear housing detachably connected to the front housing by a buckle, a PCBA board being installed inside the front housing and the rear housing, a heat sink being installed on the front housing and the rear housing, and the heat sink being located above the PCBA board;

[0005] The PCBA board is installed with an LED lamp for light prompting, a light guide for improving the uniformity of light distribution of the LED lamp is installed between the PCBA board and the front shell, and a prompt mark is arranged on the front shell.

[0006] Preferably, a V-shaped groove for guiding the light transmission of the LED lamp is provided in the middle of the top surface of the light guide, a plurality of stripe grooves are provided on the periphery of the light guide, and a through groove for clamping the front end of the LED lamp is provided on the light guide.

[0007] Preferably, the back of the light guide is provided with a frosted surface layer for improving diffuse reflection of LED light;

[0008] The striped grooves are arranged in a V shape, and the V-shaped grooves are located directly above the through grooves.

[0009] Preferably, the PCBA board is mounted with an IC, an inductor and an HSD socket, a heat dissipation silicone sheet for improving thermal conductivity is mounted on the top surface, and screws with the bottom inserted into the rear housing are mounted on the heat dissipation sheet.

[0010] Preferably, the light guide is provided with two positioning profiling holes for increasing the firmness of the combination with the front housing, and the two positioning profiling holes are respectively located on both sides of the through slot.

[0011] Preferably, the front side of the front shell is provided with charging port identification grooves whose number is consistent with the positioning contour holes.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model effectively improves the lighting effect of the charging reminder scale of the vehicle-mounted USB charger by combining the light emitted by the LED lamp with the light guide on the front side and the diffuse reflection technology, so as to provide uniform and soft lighting at night or in low light environments, greatly improving the user's recognition and visual comfort, thereby enhancing the overall user experience.

[0014] 2. The optimized lighting system of the utility model not only makes it easier to locate the charger, but also reduces operational errors and safety hazards caused by unclear vision. At night or in a dimly lit environment, users can perform charging operations more safely and quickly, reducing safety risks.

[0015] 3. The utility model utilizes the combination of heat dissipation silicone sheet and heat sink to effectively conduct and dissipate the heat generated by the PCBA, thereby ensuring the stable operation of the charger in a high temperature environment and extending the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the light guide of the utility model;

[0019] Figure 4 It is a schematic diagram of the disassembled structure of the front shell and the rear shell of the utility model.

[0020] In the figure: 1. front shell; 101. prompt mark; 102. charging port mark slot; 2. rear shell; 3. PCBA board; 4. heat sink; 401. heat dissipation silicone sheet; 402. screw; 5. LED lamp; 501. light guide; 5011. V-shaped groove; 5012. striped groove; 5013. through groove; 5014. frosted surface layer; 5015. positioning contour hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The car USB charger has uneven brightness and low recognition in the sign lighting. To solve this problem, please refer to Figure 1-Figure 4 This embodiment proposes a car USB charger, which can greatly improve the recognition of the logo, thereby improving the convenience and safety of users, and effectively solves the heat dissipation problem of the USB charger when working. The front shell 1 and the rear shell 2 are detachably connected by a buckle, and the connection method is simple and convenient. At the same time, the close combination between the two shells is ensured to prevent the internal parts from loosening. The PCBA board 3 is assembled in the slot between the front shell 1 and the rear shell 2, so that the PCBA board 3 can be firmly fixed inside the shell to ensure the stability of the entire module structure. The heat sink 4 installed on the front shell 1 and the rear shell 2 is located above the PCBA board 3. The PCBA board 3 is installed with an LED lamp 5 for light prompting. The light guide 501 installed between the PCBA board 3 and the front shell 1 is used to improve the uniformity of the light distribution of the LED lamp 5. A prompting mark 101 is set on the front shell 1. When working, the LED lamp 5 is used to emit light, and the light guide 501 is used to evenly emit the light outward and guide it to the charging prompt mark 101, so as to achieve clear illumination of the mark. The LED lamp 5 preferably uses an SMD LED type, and also selects an appropriate LED color temperature. For example, a higher color temperature close to 6000K will make the light more blue, while a lower color temperature close to 2700K will make the light more yellow. In actual use, it can be determined within this range as needed. The LED lamp 5 emits relatively soft light itself, and cooperates with the light guide 501 with diffuse reflection function, so that the light can be scattered more evenly, reducing glare, thereby achieving a soft effect.

[0023] In order to effectively improve the uniformity of light distribution, such as Figure 2 and Figure 3As shown, a V-shaped groove 5011 is provided in the middle of the top surface of the light guide 501 for guiding the light transmission of the LED lamp 5, a plurality of stripe grooves 5012 are provided on the periphery of the light guide 501, a through groove 5013 is provided on the light guide 501 for clamping the front end of the LED lamp 5, a frosted surface layer 5014 is provided on the back of the light guide 501 for improving the diffuse reflection of the light of the LED lamp 5, the stripe grooves 5012 are arranged in a V shape, and the V-shaped groove 5011 is located directly above the through groove 5013. The V-shaped groove 5011 realizes the transmission of light through the principle of total reflection of light. When light is incident from the light guide 501 with a high refractive index into the air with a low refractive index, the light will be refracted. If the incident angle of the light is less than the critical angle, it will be completely reflected back to the original medium, and no light transmission will occur. The design of the V-groove 5011 makes the incident angle of the light always less than the critical angle, so the light will always be totally reflected and transmitted along a specific path, thereby achieving the light guiding effect, ensuring that after the light is emitted from the LED lamp 5, it can be transmitted to the area that needs to be illuminated through the light guide 501, thereby improving the utilization efficiency of the light. A plurality of stripe grooves 5012 are combined to form reflective stripes, thereby effectively changing the propagation path of the light, increasing the scattering and uniform distribution of the light, and on this basis, with the texture of the frosted surface layer 5014 on the surface of the light guide 501, diffuse reflection is further enhanced, so that the light is dispersed more evenly.

[0024] When the car USB charger with high charging power is working, the PCBA circuit board will heat up seriously. If the heat dissipation is not done well, it will affect the high temperature operation of the charger. In order to effectively solve the heat dissipation problem of the USB charger when working, Figure 2 and Figure 4 As shown, the PCBA board 3 is mounted with IC, inductor and HSD socket, and a heat dissipation silicone sheet 401 for improving thermal conductivity is mounted on the top surface thereof, and a screw 402 whose bottom is inserted into the rear housing 2 is mounted on the heat sink 4 to ensure close contact between the heat sink 4, the heat dissipation silicone sheet 401 and the IC, inductor and HSD socket with large heat generation. When working, the IC, inductor and HSD socket transfer heat from the heat dissipation silicone sheet 401 to the heat sink 4, and dissipate the heat into the air through the increased surface area of ​​the heat sink 4, thereby ensuring the stable operation of the USB charger and extending its service life. By solving the heat dissipation problem, the working stability of the charger has been significantly improved. Even in the case of long-term high-power operation, the charger can maintain good performance, is not prone to failure or performance degradation, and provides users with a more reliable charging service.

[0025] like Figure 1 and Figure 4As shown, the light guide 501 is provided with two positioning profiling holes 5015 for increasing the firmness of the combination with the PCBA board 3, and the two positioning profiling holes 5015 are respectively located on both sides of the through groove 5013, and the front side of the front shell 1 is provided with charging port identification grooves 102 with the same number as the positioning profiling holes 5015. When assembling the entire USB charger, the light guide 501 is first installed into the front shell 1, and then the PCBA board 3 is installed, and the TYPE A and TYPE C sockets on the front side of the PCBA board 3 pass through the positioning profiling holes 5015 and match with the charging port identification grooves 102 to achieve the limitation of the PCBA board 3, and then the rear shell 2 is installed, and finally the heat sink 4 is installed.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A vehicle-mounted USB charger, comprising a front housing (1) and a rear housing (2) detachably connected to the front housing (1) via a buckle, characterized in that: A PCBA board (3) is installed inside the front housing (1) and the rear housing (2), and a heat sink (4) is installed on the front housing (1) and the rear housing (2), and the heat sink (4) is located above the PCBA board (3); An LED lamp (5) for light prompting is installed on the PCBA board (3), a light guide (501) for improving the uniformity of light distribution of the LED lamp (5) is installed between the PCBA board (3) and the front housing (1), and a prompting mark (101) is provided on the front housing (1).

2. The vehicle-mounted USB charger according to claim 1, characterized in that: A V-shaped groove (5011) for guiding the transmission of light from the LED lamp (5) is provided in the middle of the top surface of the light guide (501), a plurality of striped grooves (5012) are provided on the periphery of the light guide (501), and a through groove (5013) for clamping the front end of the LED lamp (5) is provided on the light guide (501).

3. The vehicle-mounted USB charger according to claim 2, characterized in that: The back side of the light guide (501) is provided with a frosted surface layer (5014) for improving diffuse reflection of light from the LED lamp (5); The striped grooves (5012) are arranged in a V-shape, and the V-shaped grooves (5011) are located directly above the through grooves (5013).

4. The vehicle-mounted USB charger according to claim 1, characterized in that: The PCBA board (3) is mounted with an IC, an inductor and an HSD socket, and a heat dissipation silicone sheet (401) for improving thermal conductivity is mounted on the top surface thereof, and screws (402) whose bottoms are inserted into the interior of the rear housing (2) are mounted on the heat dissipation sheet (4).

5. The vehicle-mounted USB charger according to claim 1, characterized in that: The light guide (501) is provided with two positioning profiling holes (5015) for increasing the firmness of the combination with the front housing (1), and the two positioning profiling holes (5015) are respectively located on both sides of the through slot (5013).

6. The vehicle-mounted USB charger according to claim 1, characterized in that: The front surface of the front housing (1) is provided with charging port identification grooves (102) whose number is the same as the positioning contour holes (5015).

Images