A vehicle-mounted charging device

Abstract

The application discloses a vehicle-mounted charging device, which comprises a shell, a circuit board and a back cover. The shell and the back cover are both in a strip shape. The rear side of the shell is provided with a boss, and the boss is formed with a mounting cavity. The circuit board is mounted in the mounting cavity. The back cover is connected to the rear side of the boss to fix the circuit board. At least two data interfaces are arranged on the circuit board. The inner wall of the mounting cavity is provided with protrusions corresponding to the two data interfaces. The protrusions abut against the top surfaces of the data interfaces, and the protrusions and the circuit board limit the data interfaces. The shell and the back cover are designed in a strip shape, which can be embedded into an aluminum profile groove to save the occupied space. Moreover, at least two data interfaces are arranged, so that the problem of single type of charging device socket can be solved.

Description

Technical Field

[0001] This application relates to the technical field of charging devices, and more particularly to an on-board charging device. Background Technology

[0002] Currently available in-vehicle USB charging devices have significant limitations in their application scenarios. They are mainly installed in the front seat area of ​​small passenger cars, which can only meet the basic charging needs of drivers and passengers in small cars. They have not yet been adapted for the use scenarios of public transportation buses. Public transport buses, as the core mode of transportation for public travel, are characterized by a large number of passengers and frequent passenger flow. In this scenario, passengers' demand for charging portable electronic devices is far higher than that in small passenger vehicles, and this demand continues to grow with the increase in public travel time. However, existing onboard USB charging devices generally have the inherent drawback of occupying a large amount of space, and their structural design does not take into account the environmental characteristics of public transport buses, which are densely populated and have limited usable space. If existing devices are directly applied to public transport buses, not only will the space occupation problem easily affect passenger passage and riding comfort, but it will also be difficult to achieve multi-point layout to meet the charging needs of a large number of passengers simultaneously. As a result, the onboard charging demand in the public transport bus sector has long been unmet. Utility Model Content

[0003] The purpose of this application is to provide an on-board charging device that can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution: On one hand, an on-board charging device is provided, comprising: a housing, a circuit board, and a rear cover. The housing and the rear cover are both strip-shaped structures. The rear side of the housing is provided with a boss, and a mounting cavity is formed in the boss. The circuit board is installed in the mounting cavity. The rear cover is snapped onto the rear side of the boss to fix the circuit board. The circuit board is provided with at least two data interfaces. The inner wall of the mounting cavity is provided with protrusions corresponding to the two data interfaces. The protrusions abut against the top surface of the data interfaces. The protrusions and the circuit board cooperate to limit the data interfaces.

[0005] Furthermore, the inner wall of the mounting cavity is provided with a plurality of spaced-apart support members, which are located on the bottom surface of the circuit board.

[0006] Furthermore, a positioning groove is formed between the two protrusions, and a positioning element is protruding from the side of the rear cover facing the outer shell, the positioning element cooperating with the positioning groove for positioning.

[0007] Furthermore, the top and bottom surfaces of the boss are provided with fastening positions, and the rear cover is provided with a first buckle that engages with the fastening positions.

[0008] Furthermore, the two sides of the boss are provided with cable passages, through which power supply cables pass and are connected to the circuit board.

[0009] Furthermore, the rear cover is provided with a second buckle that can be fastened to the wire passage opening, wherein after the second buckle is fastened to the wire passage opening, a wiring space is formed between the second buckle and the wire passage opening for the wire to pass through.

[0010] Furthermore, the top and bottom surfaces of the boss are each provided with at least two third buckles, which can be fastened into the aluminum profile grooves on the side of the bus.

[0011] Furthermore, the outer casing has at least two through holes on the side opposite to the back cover, and the two through holes correspond one-to-one with the two data interfaces. The outer casing also has a charging indicator on the side opposite to the back cover.

[0012] Furthermore, the two data interfaces are a USB-A interface and a USB-C interface, respectively.

[0013] Furthermore, the overall thickness of the rear cover after it is installed on the outer shell is h, wherein 14.5mm≤h≤16.6mm.

[0014] The beneficial effects of this application are as follows: First, the outer shell and back cover adopt a strip structure, which significantly optimizes the space occupancy rate of the equipment and can flexibly adapt to the environment of densely populated buses with limited available space. After installation, it will not affect passenger passage or riding comfort, breaking through the limitation of existing equipment that cannot be deployed in batches in bus scenarios due to its large size. Second, the circuit board integrates at least two data interfaces, and a single device can provide charging services for multiple passengers at the same time, accurately matching the characteristics of a large number of passengers and concentrated charging demand in buses, and greatly improving the charging service capacity per unit space. Third, the protrusions on the inner wall of the mounting cavity cooperate with the circuit board to form a double limit on the data interface, which can effectively resist the vibration and impact during bus operation, avoid charging interruption caused by data interface loosening due to bumps, and also prevent the data interface from deforming after repeated plugging and unplugging, ensuring the stable use of the equipment under the complex working conditions of buses. Attached Figure Description

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the on-board charging device described in the embodiments of this application; Figure 2This is an exploded view of the on-board charging device described in the embodiments of this application; Figure 3 This is a schematic diagram of the outer casing described in an embodiment of this application; Figure 4 This is a schematic diagram of the back cover described in an embodiment of this application; Figure 5 This is an assembly drawing of the on-board charging device and aluminum profile described in the embodiments of this application; Figure 6 This is a schematic diagram showing the thickness of the on-board charging device described in the embodiments of this application.

[0017] In the diagram: 1. Outer shell; 101. Boss; 102. Through hole; 103. Charging indicator; 1011. Mounting cavity; 1012. Protrusion; 1013. Support; 1014. Positioning groove; 1015. Cable guide; 1016. Third buckle; 1017. Fastening position; 2. Circuit board; 201. Data interface; 3. Back cover; 301. First buckle; 302. Second buckle; 303. Positioning component; 4. Aluminum profile; 401. Groove; 5. Cable routing space. Detailed Implementation

[0018] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-6 As shown, this embodiment provides a vehicle-mounted charging device that can be installed in a groove 401 of an aluminum profile 4 on the side of a bus. The vehicle-mounted charging device includes: a housing 1, a circuit board 2, and a rear cover 3. Both the housing 1 and the rear cover 3 are strip-shaped structures. The rear side of the housing 1 is provided with a boss 101, and a mounting cavity 1011 is formed in the boss 101. The circuit board 2 is installed in the mounting cavity 1011. The rear cover 3 is snapped onto the rear side of the boss 101 to fix the circuit board 2. The circuit board 2 is provided with at least two data interfaces 201. The inner wall of the mounting cavity 1011 is provided with protrusions 1012 corresponding to the two data interfaces 201. The protrusions 1012 abut against the top surface of the data interfaces 201. The protrusions 1012 and the circuit board 2 cooperate to limit the data interfaces 201.

[0022] Based on the above solution, firstly, the outer shell 1 and the rear cover 3 are designed as strip structures, so that their external dimensions are precisely matched with the groove specifications of the groove 401 of the aluminum profile 4 on the side of the bus. They can be directly embedded into the groove 401 to achieve embedded installation. This avoids the equipment protruding from the side of the bus and occupying the space for passenger passage or leaning, and it can also use the original aluminum profile 4 structure of the bus as the installation base. There is no need to build an additional independent installation bracket, thus solving the space occupation problem from the perspective of structural adaptability.

[0023] Secondly, the independent mounting cavity 1011 formed by the rear protrusion 101 of the outer shell 1 carries the circuit board 2. At the same time, the rear cover 3 is fixed to the protrusion 101 by a snap-fit ​​method, without the need for screws or other additional fasteners. Assembly can be completed by pressing, which greatly simplifies the installation process. Moreover, the snap-fit ​​structure can tightly wrap the protrusion 101 to prevent the rear cover 3 from loosening during the operation of the bus, thus solving the problems of complex installation and poor assembly stability.

[0024] Furthermore, protrusions 1012 corresponding to data interfaces 201 are provided on the inner wall of the mounting cavity 1011. The protrusions 1012 abut against the top surface of the data interface 201 and form an upper and lower clamping structure with the circuit board 2 supported at the bottom of the mounting cavity 1011. Through double limiting, the impact of continuous vibration on the data interface 201 during the bus operation is effectively offset, preventing the interface from falling off the solder joint of the circuit board 2 or the data interface 201 itself from becoming loose. This solves the problem of interface failure caused by vibration from the perspective of structural stability, and also prevents the data interface 201 from deforming due to repeated plugging and unplugging.

[0025] Finally, by integrating at least two data interfaces 201 on the circuit board 2, a single device can serve two or more passengers simultaneously with multiple interfaces, accurately matching the characteristics of a large number of passengers and concentrated charging needs in buses. It can also cover the charging needs of traditional and new portable electronic devices with a combination of multiple types of interfaces, eliminating the need for passengers to carry adapters. This solves the problems of single interface type and low service efficiency from the perspective of functional adaptation.

[0026] Furthermore, the inner wall of the mounting cavity 1011 is also provided with a plurality of spaced-apart support members 1013, which are located on the bottom surface of the circuit board 2. From the perspective of supporting the circuit board 2, the support members 1013 provide a uniformly distributed upward lifting force to the circuit board 2 through physical contact with the bottom surface of the circuit board 2, preventing the circuit board 2 from being suspended in the middle area or having concentrated force at the edges due to its own weight or vibration impact, and preventing the circuit board 2 from bending and deforming. From the perspective of enhancing the rigidity of the inner wall, the spaced-apart support members 1013 form an integrated structure with the inner wall of the mounting cavity 1011, which is equivalent to constructing a micro-reinforcement structure in the cavity. This can disperse the impact force transmitted from the bus vibration to the inner wall to the multiple support members 1013, reducing the deformation caused by excessive local stress on the inner wall. At the same time, the connection between the support members 1013 and the circuit board 2 can further limit the displacement amplitude of the inner wall, preventing the deformation of the inner wall from affecting the relative position of the circuit board 2 and the data interface 201, and ensuring the stability of the overall structure in a vibration environment.

[0027] Furthermore, a positioning groove 1014 is formed between the two protrusions 1012, and a positioning element 303 protrudes from the side of the rear cover 3 facing the outer shell 1. The positioning element 303 cooperates with the positioning groove 1014 for positioning. Based on the two data interfaces 201 existing on the inner wall of the mounting cavity 1011 corresponding to the protrusions 1012, a recessed positioning groove 1014 is naturally formed between the two protrusions 1012. The size and shape of the positioning groove 1014 are designed according to the positioning requirements of the rear cover 3 to ensure a proper fit with the positioning element 303. A positioning element 303 is integrally protruded from the side of the rear cover 3 facing the outer shell 1, and its shape precisely matches the positioning groove 1014, such as a rectangular or trapezoidal structure to prevent mistaken identification. During the assembly stage, when the rear cover 3 aligns with the boss 101 of the outer shell 1, the positioning component 303 needs to be embedded in the positioning groove 1014 first. The circumferential constraint of the positioning groove 1014 guides the rear cover 3 to quickly find the snap-fit ​​position with the boss 101, avoiding the rear cover 3 from shifting left or right or misaligning up or down, and ensuring that the snap-fit ​​structure can be accurately aligned and fastened. During the use stage, the lateral vibration generated by the bus will generate a lateral thrust on the rear cover 3. At this time, the fitting structure of the positioning groove 1014 and the positioning component 303 can form a rigid limit, preventing the rear cover 3 from shifting laterally, preventing the snap-fit ​​from loosening due to long-term displacement friction, and at the same time preventing the rear cover 3 from shifting and causing the sealing gap of the mounting cavity 1011 to increase.

[0028] In some embodiments, the top and bottom surfaces of the boss 101 are provided with engagement positions 1017, and the rear cover 3 is provided with a first buckle 301 that engages with the engagement positions 1017. In this scheme, firstly, engagement positions 1017, such as slots or buckle holes, are provided on the top and bottom surfaces of the boss 101, so that the engagement positions 1017 are symmetrically distributed vertically to ensure that the force points are balanced when the rear cover 3 is assembled with the boss 101; secondly, a first buckle 301 that precisely matches the upper and lower engagement positions 1017 is provided on the side of the rear cover 3 facing the boss 101. During assembly, the rear cover 3 is aligned with the rear side of the boss 101, and the first buckle 301 is simultaneously inserted into the engagement positions 1017 on the top and bottom surfaces of the boss 101 by pressing the rear cover 3. The combination of the upper and lower double buckles and the double buckle engagement 1017 can form a two-way clamping fixation from the vertical direction of the boss 101, avoiding the defect of traditional single-sided buckles that can only fix from one direction and are prone to loosening on one side due to bus vibration.

[0029] Meanwhile, the two sides of the boss 101 are also provided with cable passages 1015, through which power supply cables pass and are connected to the circuit board 2. On the one hand, the cable passages 1015 provide a dedicated passage for the cables connected to the circuit board 2, preventing the cables from randomly passing through the gaps in the mounting cavity 1011, ensuring that the cable layout is compatible with the equipment structure. At the same time, the position design of the side of the boss 101 allows the cables to run along the inner wall of the groove 401 of the bus aluminum profile 4, without occupying the external passenger activity space of the groove 401. On the other hand, the diameter of the cable passage 1015 matches the outer diameter of the cable, which can limit the cable to a certain extent, reduce the large shaking of the cable when the bus is moving, and prevent poor contact or solder joint detachment at the connection end between the cable and the circuit board 2 due to frequent pulling.

[0030] The rear cover 3 is equipped with a second latch 302 that can be fastened to the cable passage 1015. When the second latch 302 is fastened to the cable passage 1015, a cable routing space 5 is formed between the second latch 302 and the cable passage 1015 for the wire to pass through. When the rear cover 3 is engaged with the rear side of the protrusion 101, the second latch 302 simultaneously embeds and fastens into the cable passage 1015, forming a tight fit. A gap adapted to the wire diameter is reserved between the second latch 302 and the inner wall of the cable passage 1015. This gap constitutes the cable routing space 5 for the power supply wire, ensuring smooth passage of the wire while limiting lateral displacement and vertical swaying of the wire during bus travel through the physical restraining effect of the second latch 302.

[0031] It should be noted that at least two third buckles 1016 are provided on the top and bottom surfaces of the boss 101, and the third buckles 1016 can be fastened into the groove 401 of the aluminum profile 4 on the side of the bus. From a structural compatibility perspective, the third clip 1016's dimensions precisely match the groove outline, wall thickness, or pre-set slot of the inner wall of the aluminum profile 4 groove 401 on the side of the bus, forming a two-way clamping structure through physical snap-fit. From a fixing strength perspective, the distributed layout of at least two clips can disperse the weight of the equipment itself and the force generated by vibration, avoiding excessive force at a single point that could cause the clip to break or loosen. From an installation logic perspective, during installation, only the equipment needs to be aligned with the aluminum profile 4 groove 401 and a pushing force applied, causing the third clip 1016 to undergo slight elastic deformation under external force. After the third clip 1016 is fully embedded in the matching position of the inner wall of the groove 401, the third clip 1016 returns to its deformation and forms a tight fastening with the groove 401. Stable connection between the equipment and the aluminum profile 4 can be achieved without additional fasteners. At the same time, during reverse disassembly, only a moderate external force needs to be applied to disengage the third clip 1016 from the groove 401, avoiding damage to the structure of the aluminum profile 4.

[0032] Generally, the outer casing 1 has at least two through holes 102 on the side facing away from the rear cover 3. Each of the two through holes 102 corresponds to one of the two data interfaces 201. A charging indicator 103 is also provided on the side of the outer casing 1 facing away from the rear cover 3. On the side of the outer casing 1 facing away from the rear cover 3, i.e., the exposed side of the device facing the passenger, at least two through holes 102 are provided, and the through holes 102 are precisely aligned and correspond one-to-one with the data interfaces 201 on the circuit board 2. This design ensures that the insertion port of the data interface 201 can be fully exposed to the outside of the device through the through holes 102, allowing passengers to directly insert the charging cable into the interface from the outside, avoiding the problem of being able to see but not use it due to the outer casing 1 obstructing the view. Simultaneously, the outer casing 1 can cover the sides and rear structure of the data interface 201, forming a physical protective barrier to prevent accidental collisions, clothing friction, or dust and debris from directly contacting the core components of the interface during passenger boarding and alighting, thus preventing damage to the interface due to external impact or foreign object intrusion. The design of the charging sign 103 provides visual guidance. Because the interior of a bus contains various facilities such as seats, handrails, and advertising signs, and lighting conditions may deteriorate depending on the time of day or the level of crowding, passengers may easily overlook the location of the charging equipment. Placing the charging sign 103 on the exposed side of the outer casing 1 away from the rear cover 3, and associating it with the through-hole 102, can create a clear visual signal through graphics (such as a battery symbol or lightning bolt symbol) or text (such as "USB charging"), quickly attracting passenger attention and guiding them to accurately locate the charging interface. This solves the problem of the equipment being installed but not easily found by passengers.

[0033] The two data interfaces 201 are a USB-A interface and a USB-C interface, respectively. The USB-A interface, as a mainstream traditional interface, can directly adapt to older mobile phones, ordinary power banks, Bluetooth speakers, and other devices using USB-A plugs, covering the needs of passengers still using traditional charging accessories. The USB-C interface, as a current and future mainstream new interface, not only adapts to newer mobile phones, tablets, wireless headphones, and other devices equipped with USB-C ports, but also supports fast charging protocols (such as PD and QC protocols), meeting passengers' needs for fast charging. The two interfaces are integrated through circuit board 2 to achieve functional coexistence, without increasing the device size. This effectively covers the differences in device interface types among different passengers, completely solving the core problem of "a single interface cannot match diverse devices" from the interface function adaptation perspective, ensuring that passengers with different device specifications can directly use the charging device without relying on external adapters.

[0034] Specifically, the overall thickness of the rear cover 3 after installation on the outer shell 1 is h, where 14.5mm ≤ h ≤ 16.6mm. This overall thickness of 14.5mm-16.6mm perfectly matches the dimensions of the groove 401 on the side aluminum profile 4 of mainstream buses, allowing for fully embedded installation of the device. After installation, the outer surface of the device is flush with the surface of the groove 401 on the aluminum profile 4, ensuring it does not protrude beyond the groove 401 and obstruct passenger passage or leaning space, nor does it cause the device to wobble due to excessive gaps. This perfectly solves the problem of existing on-board charging devices being unable to adapt to the narrow space of buses due to excessive thickness, significantly improving the utilization rate of the bus's interior space and passenger comfort.

[0035] Moreover, this thickness range achieves an optimal balance between compact space and component accommodation, avoiding the deformation of internal circuit boards 2 and data interfaces 201 due to insufficient thickness, and eliminating the need to compensate for space defects by thickening the shell. This ensures that the wall thickness of the outer shell 1 and the rear cover 3 meets the impact resistance requirements in the bus scenario, reduces the probability of equipment failure due to structural compression or stress deformation, and extends the service life of the equipment.

[0036] In practical applications, multiple vehicle charging devices can be installed in the groove 401 of the aluminum profile 4, so that each row of seats is equipped with at least one vehicle charging device. The circuit connection is achieved by placing a bus in the groove 401, and each vehicle charging device is connected to the bus through a branch line. Each branch line is connected to the circuit board 2 to realize current transmission.

[0037] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A vehicle-mounted charging device, characterized in that, include: The outer shell (1), circuit board (2) and back cover (3) are strip-shaped. The rear side of the outer shell (1) is provided with a boss (101). An installation cavity (1011) is formed in the boss (101). The circuit board (2) is installed in the installation cavity (1011). The back cover (3) is snapped into the rear side of the boss (101) to fix the circuit board (2). The circuit board (2) is provided with at least two data interfaces (201). The inner wall of the installation cavity (1011) is provided with protrusions (1012) corresponding to the two data interfaces (201). The protrusions (1012) abut against the top surface of the data interface (201). The protrusions (1012) and the circuit board (2) cooperate to limit the data interface (201).

2. The on-board charging device according to claim 1, characterized in that, The inner wall of the mounting cavity (1011) is also provided with a plurality of spaced support members (1013), which are located on the bottom surface of the circuit board (2).

3. The on-board charging device according to claim 1, characterized in that, A positioning groove (1014) is formed between the two protrusions (1012), and a positioning element (303) is provided on the side of the back cover (3) facing the outer shell (1), and the positioning element (303) cooperates with the positioning groove (1014) for positioning.

4. The on-board charging device according to claim 1, characterized in that, The top and bottom surfaces of the boss (101) are provided with fastening positions (1017), and the rear cover (3) is provided with a first buckle (301) that engages with the fastening positions (1017).

5. The on-board charging device according to claim 1, characterized in that, The boss (101) also has wire passages (1015) on both sides, through which power supply wires are passed and connected to the circuit board (2).

6. The on-board charging device according to claim 5, characterized in that, The rear cover (3) is provided with a second buckle (302) that can be fastened to the wire passage (1015). After the second buckle (302) is fastened to the wire passage (1015), a wiring space (5) for the wire to pass through is formed between the second buckle (302) and the wire passage (1015).

7. The on-board charging device according to any one of claims 1-6, characterized in that, The top and bottom surfaces of the boss (101) are provided with at least two third buckles (1016), which can be fastened into the groove (401) of the aluminum profile (4) on the side of the bus.

8. The on-board charging device according to any one of claims 1-6, characterized in that, The outer casing (1) has at least two through holes (102) on the side away from the back cover (3), and the two through holes (102) correspond one-to-one with the two data interfaces (201). The outer casing (1) also has a charging symbol (103) on the side away from the back cover (3).

9. The on-board charging device according to any one of claims 1-6, characterized in that, The two data interfaces (201) are a USB-A interface and a USB-C interface, respectively.

10. The on-board charging device according to any one of claims 1-6, characterized in that, The overall thickness of the back cover (3) after it is installed on the outer shell (1) is h, wherein 14.5mm≤h≤16.6mm.

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