Vehicle-mounted charger

Abstract

The utility model discloses a vehicle-mounted charger which comprises a charger main body and a cigarette lighting head, and the charger main body comprises a power supply plugging part, a charging connection part and a circuit board. First heat dissipation holes are also formed in the power supply plugging part; a charging circuit is arranged on the circuit board; a negative ion generator and a power-off protection mechanism are arranged in the mounting cavity; the negative ion generator is electrically connected to the circuit board; the charging connection part is further provided with second heat dissipation holes, a mounting groove and a purification opening. The input end of the purification port is connected to the output end of the negative ion generator; the power-off protection mechanism comprises a first relay, a touch display screen and a temperature sensor; the first relay is electrically connected to the charging circuit so as to switch on or off the charging circuit; the touch display screen is arranged in the mounting groove; the charging circuit can be automatically disconnected from the output voltage of the automobile storage battery, the power-off protection of the vehicle-mounted charger can be realized, and the use safety of the vehicle-mounted charger is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of vehicle chargers, and in particular to a vehicle charger. Background Technology

[0002] In today's society, with the development and progress of technology, mobile phone use has become quite common, leading to a growing market demand for portable charging and increasingly diversified charging methods, such as power banks and car chargers. Among these, car chargers have been widely accepted and used by a considerable number of people due to their advantages such as large charging capacity and high convenience.

[0003] However, the technology of car chargers is not yet fully mature. Generally, if the charging time is too long, it will cause serious overheating. Existing car chargers generally have defects such as unstable voltage output, lack of overload protection circuits, and lack of over-temperature protection functions, resulting in low product safety. If used for a long time, it will easily cause unnecessary safety accidents.

[0004] Later, a type of car charger with fast heat dissipation and cooling appeared on the market, such as CN216290276U. It includes a plastic shell body, with a heat dissipation hole A at the front end of the plastic shell body, a base installed at the rear end of the plastic shell body, a heat dissipation hole B at one end of the base, a USB port at the center of the base, a movable button connected to the outer wall of the plastic shell body, a circuit board installed inside the plastic shell body, and a charger plug at the top of the heat dissipation hole A. A connecting spring is connected to one end of the charger plug. The addition of heat dissipation holes to the car charger body accelerates heat dissipation, which helps to reduce the temperature of the car charger body and avoid overheating, thereby reducing safety hazards. However, relying on a single heat dissipation method cannot fundamentally solve the problem of unstable voltage output when overheating. Secondly, the function of this type of car charger is too limited, only having a charging function.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide a vehicle charger in which the first heat dissipation hole, the second heat dissipation hole, and the power-off protection mechanism work together. When the temperature sensor detects that the temperature inside the charging connection is too high, it will transmit a signal to the first relay, causing the first relay to shut down the circuit in the charging circuit. This can automatically disconnect the charging circuit from the output voltage of the car battery, realize the power-off protection of the vehicle charger, enhance the safety of the vehicle charger, and reduce safety hazards.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A vehicle charger includes a charger body and a cigarette lighter. The charger body includes a power plug and a charging connection. The power plug and the charging connection are connected vertically to form an installation cavity. The cigarette lighter is disposed on the lower end face of the power plug, and a spring is also provided on the lower end face of the power plug. A circuit board is disposed inside the installation cavity.

[0009] The charging connector is provided with a plurality of charging ports, which are spaced apart on the upper surface of the charging connector and electrically connected to the circuit board; a connector connecting wire is connected to one of the charging ports.

[0010] The power plug is also provided with a first heat dissipation hole; the circuit board is provided with a charging circuit; the mounting cavity is provided with a negative ion generator and a power failure protection mechanism; the negative ion generator is electrically connected to the circuit board.

[0011] The circuit board is also equipped with a charging power detection circuit, which is connected to the charging port and the touch screen; a ring-shaped colored light is also provided on the upper surface of the charging connection part; a voltage comparison module is connected to the charging power detection circuit, and the voltage comparison module is electrically connected to the ring-shaped colored light.

[0012] The charging connector is also provided with a second heat dissipation hole, a mounting slot, and a purification port for dispersing negative ions into the air; the first and second heat dissipation holes are connected to the mounting cavity; the purification port is located next to the charging port; the input end of the purification port is connected to the output end of the negative ion generator.

[0013] The power failure protection mechanism includes a first relay, a touch screen, and a temperature sensor; the temperature sensor is electrically connected to the first relay; the first relay is electrically connected to the charging circuit to turn the charging circuit on or off; the touch screen is disposed in a mounting slot.

[0014] As a preferred embodiment, the ring-shaped colored light includes red LEDs and green LEDs; when the red LEDs are lit and the green LEDs are not lit, the ring-shaped colored light is in a first state; when the red LEDs are not lit and the green LEDs are lit, the ring-shaped colored light is in a second state.

[0015] As a preferred embodiment, the voltage comparison module includes a voltage detection circuit and a voltage comparison circuit; the voltage detection circuit detects the voltage output by the car battery and inputs the detection result to the voltage comparison circuit, which compares the detection result with a preset voltage value; when the detection result is greater than the preset voltage value, the voltage comparison circuit controls the ring light to be in a first state, and when the detection result is less than or equal to the preset voltage value, the voltage comparison circuit controls the ring light to be in a second state.

[0016] As a preferred embodiment, the voltage comparison circuit is a voltage comparator.

[0017] As a preferred embodiment, a second relay is electrically connected to the circuit board, the second relay is electrically connected to the touch screen, and the second relay is electrically connected to the negative ion generator to turn the negative ion generator on or off; thus, the negative ion generator can be controlled to turn on or off via the touch screen, eliminating the need for a separate control switch.

[0018] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly uses the design of the first heat dissipation hole and the second heat dissipation hole, which helps to reduce the temperature of the car charger body and avoid overheating of the car charger.

[0019] Secondly, the design and coordination of the first relay, touch screen, and temperature sensor are crucial. The temperature sensor is electrically connected to the first relay, which is electrically connected to the charging circuit to turn the charging circuit on or off. Thus, when the temperature sensor detects that the temperature inside the charging connection is too high, it will transmit a signal to the first relay, causing the first relay to shut down the circuit in the charging circuit. This automatically disconnects the charging circuit from the output voltage of the car battery and provides power-off protection for the on-board charger, enhancing the safety of the on-board charger and reducing safety hazards.

[0020] Next is the design of the negative ion generator, which enables the car charger to not only meet the needs of charging electronic devices, but also generate negative ions to purify the air inside the car and eliminate odors.

[0021] Finally, there is the design of the charging power detection circuit. Its voltage comparison module detects and compares the voltage output by the car battery, and controls the ring light to be in the first or second state based on the comparison result. It can provide a reminder when the car battery voltage is too low.

[0022] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0024] Figure 2 This is a top view of an embodiment of the present utility model;

[0025] Figure 3 This is an exploded view of an embodiment of the present utility model;

[0026] Figure 4 This is the control frame of an embodiment of the present utility model.

[0027] Explanation of reference numerals in the attached diagram:

[0028] 10. Charger body 11. Power plug

[0029] 12. Charging connector 13. Spring contact

[0030] 14. Circuit board 111, First heat dissipation hole

[0031] 121. Charging port; 122. Second heat dissipation hole

[0032] 123. Purification port 15. Negative ion generator

[0033] 16. First relay 17. Touch screen

[0034] 18. Temperature sensor 19. Charging power detection circuit

[0035] 19A, Charging Comparison Module

[0036] 191. Circular colored lights; 192. Red LED beads.

[0037] 193. Green LED bead; 194. Voltage detection circuit

[0038] 195. Voltage Comparison Circuit; 141. Second Relay

[0039] 14A, charging circuit; 20, cigarette lighter. Detailed Implementation

[0040] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0041] In the description of this utility model, it should be noted that the directional terms such as "up", "down", "front", "back", "left", and "right" indicate the orientation and positional relationship based on the accompanying drawings or the orientation or positional relationship shown when wearing and using the device normally. They are only for the convenience of describing this utility model 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. They should not be construed as limiting the specific protection scope of this utility model.

[0042] A vehicle charger includes a charger body 10 and a cigarette lighter 20.

[0043] The charger body 10 includes a power plug 11 and a charging connection 12; the power plug 11 and the charging connection 12 are connected vertically to form an installation cavity; the cigarette lighter 20 is disposed on the lower end face of the power plug 11, and a spring contact 13 is also provided on the lower end face of the power plug 11; a circuit board 14 is disposed inside the installation cavity.

[0044] The charging connection part 12 is provided with a plurality of charging ports 121, which are spaced apart on the upper surface of the charging connection part 12 and electrically connected to the circuit board 14; a port connection wire is connected to one of the charging ports 121.

[0045] The power plug-in part 11 is also provided with a first heat dissipation hole 111; the circuit board 14 is provided with a charging circuit 14A; the mounting cavity is provided with a negative ion generator 15 and a power failure protection mechanism; the negative ion generator 15 is electrically connected to the circuit board 14; in this embodiment, the working principle of the negative ion generator 15 in generating negative ions is a well-known technology in the art, and will not be described in detail here.

[0046] The charging connection part 12 is also provided with a second heat dissipation hole 122, a mounting groove, and a purification port 123 for dispersing negative ions into the air; the first heat dissipation hole 111 and the second heat dissipation hole 122 are connected to the mounting cavity; the purification port 123 is located on the side of the charging socket 121; the input end of the purification port 123 is connected to the output end of the negative ion generator 15.

[0047] The power failure protection mechanism includes a first relay 16, a touch screen 17, and a temperature sensor 18; the temperature sensor 18 is electrically connected to the first relay 16; the first relay 16 is electrically connected to the charging circuit 14A to turn the charging circuit 14A on or off; the touch screen 17 is disposed in the mounting slot.

[0048] Preferably, the circuit board 14 is further provided with a charging power detection circuit 19, which is connected to the charging port and the touch screen 17; a ring light 191 is also provided on the upper surface of the charging connection part 12; a voltage comparison module 19A is connected to the charging power detection circuit 19, and the voltage comparison module 19A is electrically connected to the ring light 191.

[0049] Preferably, the ring-shaped colored light 191 includes a red LED 192 and a green LED 193; when the red LED 192 is lit and the green LED 193 is not lit, the ring-shaped colored light 191 is in a first state; when the red LED 192 is not lit and the green LED 193 is lit, the ring-shaped colored light 191 is in a second state.

[0050] Preferably, the voltage comparison module 19A includes a voltage detection circuit 194 and a voltage comparison circuit 195. The voltage detection circuit 194 detects the voltage output by the car battery and inputs the detection result to the voltage comparison circuit 195. The voltage comparison circuit 195 compares the detection result with a preset voltage value. When the detection result is greater than the preset voltage value, the voltage comparison circuit 195 controls the ring light to be in a first state; when the detection result is less than or equal to the preset voltage value, the voltage comparison circuit 195 controls the ring light to be in a second state. When the car starts, if the car battery voltage is too low, the ring light 191 of the car charger emits a bright red light to remind the user that the car battery voltage is too low. Generally, the voltage comparison circuit 195 is formed by a combination of electronic components such as transistors; preferably, the voltage comparison circuit 195 is a voltage comparator.

[0051] Preferably, a second relay 141 is electrically connected to the circuit board 14, the second relay 141 is electrically connected to the touch screen 17, and the second relay 141 is electrically connected to the negative ion generator 15 to turn the negative ion generator 15 on or off; so that the negative ion generator 15 can be turned on or off by touching the touch screen 17, thus eliminating the need to set a control switch.

[0052] The key design feature of this invention is that it utilizes the design of the first and second heat dissipation holes, which helps to reduce the temperature of the car charger body and prevent the car charger from overheating.

[0053] Secondly, the design and coordination of the first relay, touch screen, and temperature sensor are crucial. The temperature sensor is electrically connected to the first relay, which is electrically connected to the charging circuit to turn the charging circuit on or off. Thus, when the temperature sensor detects that the temperature inside the charging connection is too high, it will transmit a signal to the first relay, causing the first relay to shut down the circuit in the charging circuit. This automatically disconnects the charging circuit from the output voltage of the car battery and provides power-off protection for the on-board charger, enhancing the safety of the on-board charger and reducing safety hazards.

[0054] Next is the design of the negative ion generator, which enables the car charger to not only meet the needs of charging electronic devices, but also generate negative ions to purify the air inside the car and eliminate odors.

[0055] Finally, there is the design of the charging power detection circuit. Its voltage comparison module detects and compares the voltage output by the car battery, and controls the ring light to be in the first or second state based on the comparison result. It can provide a reminder when the car battery voltage is too low.

[0056] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A vehicle charger, comprising a charger body and a cigarette lighter, wherein the charger body includes a power plug and a charging connection; the power plug and the charging connection are vertically connected to form an installation cavity; the cigarette lighter is disposed on the lower end face of the power plug, and a spring is also provided on the lower end face of the power plug; a circuit board is disposed inside the installation cavity; The charging connector is provided with a plurality of charging ports, which are spaced apart on the upper surface of the charging connector and electrically connected to the circuit board; a connector connecting wire is connected to one of the charging ports; characterized in that: The power plug is also provided with a first heat dissipation hole; the circuit board is provided with a charging circuit; the mounting cavity is provided with a negative ion generator and a power failure protection mechanism; the negative ion generator is electrically connected to the circuit board. The circuit board is also equipped with a charging power detection circuit, which is connected to the charging port and the touch screen; a ring-shaped colored light is also provided on the upper surface of the charging connection part; a voltage comparison module is connected to the charging power detection circuit, and the voltage comparison module is electrically connected to the ring-shaped colored light. The charging connector is also provided with a second heat dissipation hole, a mounting slot, and a purification port for dispersing negative ions into the air; the first and second heat dissipation holes are connected to the mounting cavity; the purification port is located next to the charging port; the input end of the purification port is connected to the output end of the negative ion generator. The power failure protection mechanism includes a first relay, a touch screen, and a temperature sensor; the temperature sensor is electrically connected to the first relay; the first relay is electrically connected to the charging circuit to turn the charging circuit on or off; the touch screen is disposed in a mounting slot.

2. The vehicle charger according to claim 1, characterized in that: The ring-shaped colored light includes red LEDs and green LEDs; when the red LEDs are lit and the green LEDs are not lit, the ring-shaped colored light is in a first state; when the red LEDs are not lit and the green LEDs are lit, the ring-shaped colored light is in a second state.

3. The vehicle charger according to claim 2, characterized in that: The voltage comparison module includes a voltage detection circuit and a voltage comparison circuit; the voltage detection circuit detects the voltage output by the car battery and inputs the detection result to the voltage comparison circuit, which compares the detection result with a preset voltage value. When the detection result is greater than the preset voltage value, the voltage comparison circuit controls the ring light to be in a first state; when the detection result is less than or equal to the preset voltage value, the voltage comparison circuit controls the ring light to be in a second state.

4. The vehicle charger according to claim 3, characterized in that: The voltage comparison circuit is a voltage comparator.

5. The vehicle charger according to claim 1, characterized in that: A second relay is electrically connected to the circuit board. The second relay is electrically connected to the touch screen and to the negative ion generator to turn the negative ion generator on or off.

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