Vehicle-mounted karaoke MP3 player hung at blowing port of automobile

Abstract

A karaoke vehicle-mounted MP3 player hung on an automobile air blowing opening comprises a fixing device and a host, the host is provided with a frequency modulation device, a display screen and a light effect device, the host comprises a main board, and the main board comprises a live broadcast mobile phone interface, a first microphone interface, a power supply interface, a second microphone interface and an audio output interface which are arranged on the bottom edge of the main board. The accompaniment mobile phone interface, the USB interface and the control assembly are arranged on the top edge of the vehicle-mounted music player, the vehicle-mounted music player is powered by a vehicle, not only can music be played in the driving process to eliminate fatigue of a driver, but also karaoke and call answering can be carried out when the vehicle is parked for rest, and convenience is provided for the driver.

Description

Technical Field

[0001] This invention relates to MP3 players, and more particularly to a car MP3 player for karaoke that is mounted on a car air vent. Background Technology

[0002] Modern cars are equipped with in-car MP3 players, which can only play music to improve the driver's mood, reduce driver fatigue, and ensure safe driving. However, they cannot be used for phone calls or karaoke. When we want to sing, we have to drive to a karaoke bar, and when our phones ring, we have to stop the car and take out our phones to answer the call. This causes a lot of inconvenience for drivers. Summary of the Invention

[0003] In order to solve the problems existing in the above-mentioned technologies, this utility model discloses a car MP3 player that is mounted on the car air vent, transmits FM signals at the same frequency as the car speakers, or is connected to the car speakers via an AUX audio cable, and can be used for karaoke, music playback, and telephone calls.

[0004] A car MP3 player for karaoke, mounted on a car air vent, includes a mounting device and a main unit. The main unit is equipped with a tuning device, a display screen, and a lighting effect device. The main unit includes a motherboard, which includes a live streaming phone interface, a first microphone interface, a power supply interface, a second microphone interface, and an audio output interface located at its bottom edge; an accompaniment phone interface and a USB interface located at its top edge; and a control component. The control component includes:

[0005] The main control module is used to receive audio signals from the accompaniment phone, the live streaming phone, the first microphone interface and the second microphone interface, and output audio processing signals, a first control signal, a second control signal, a third control signal and a fourth control signal based on the audio signals. The main control module is connected to the display screen.

[0006] The lighting effect module is connected between the main control module and the seven-color lights. It is used to receive the first control signal output by the main control module and control the color change and flashing of the seven-color lights based on the first control signal.

[0007] The USB flash drive interface module connects between the main control module and the USB interface. It is used to receive the second control signal output by the main control module, read the stored data in the USB flash drive connected to the USB interface in real time, and play it.

[0008] The accompaniment phone interface module is connected between the main control module and the accompaniment phone interface. It is used to receive the third control signal output by the main control module and collect the audio signal of the accompaniment music from the accompaniment phone connected to the accompaniment phone interface in real time. It can be used for accompaniment during live broadcasts or karaoke, and can also serve as a data exchange bridge between mobile phones and car MP3 players.

[0009] The FM transmitter module is connected to the main control module. It is used to receive the fourth control signal output by the main control module and wirelessly transmit the processed audio signal in frequency modulation through the FM antenna so that the car speaker can receive it at the same frequency.

[0010] The frequency modulation module, connected between the main control module and the FM transmitter module, can adjust the transmission frequency of the audio signal;

[0011] The key encoder module is connected between the main control module and the key processing module. It is used to process the operation commands input by the key and send the commands to the main control module for execution.

[0012] The charging / power supply module is connected between the main control module and the power source (including car battery, built-in battery, etc.) and is used to charge / power the MP3 player.

[0013] The power amplifier module is connected between the main control module and the car speaker. It is used to receive and amplify the audio processing signal and send it to the car speaker for playback.

[0014] The voltage regulator module is connected between the main control module and the charging / power supply module. It is used for voltage regulation management of the power supply and for overvoltage, overheat, overcurrent and short circuit protection of the power supply circuit to ensure the normal operation of the car MP3 player.

[0015] The Bluetooth module, connected to the main control module, is used to transmit the amplified audio signal from the power amplifier module to the car speaker at close range;

[0016] The signal receiving module is connected between the main control module and the first microphone interface and the second microphone interface. It is used to receive audio signals from the wireless microphone input and the wired microphone input, and transmit them to the main control module for processing.

[0017] Furthermore, the fixing device includes a ball joint on the main unit and a tightening nut screwed onto the ball joint.

[0018] Furthermore, the lighting effect device includes a lighting effect window installed on the host and a seven-color light installed within the lighting effect window.

[0019] Furthermore, the host also includes a front shell and a rear shell, which are fixed together to form a cavity, and the motherboard is disposed within the cavity.

[0020] Furthermore, the frequency modulation device includes a rotary cap on the main unit and a frequency modulation knob connected to the rotary cap, the frequency modulation knob being connected to the frequency modulation module.

[0021] Furthermore, the motherboard is equipped with several buttons, including a power button and a volume control button.

[0022] Furthermore, the main control module consists of a BP1048B2 main control chip and its peripheral circuits, with the BP1048B2 main control chip and its peripheral circuits integrated on the motherboard.

[0023] Furthermore, the signal receiving module can receive wired audio signals through the first microphone interface and the second microphone interface, and can also receive wireless audio signals input from a wireless microphone.

[0024] Furthermore, the motherboard includes a main control circuit, a microphone interface circuit, a live streaming phone interface circuit, an accompaniment phone interface circuit, an FM transmitter circuit, a microphone preamplifier circuit, a display circuit, a power supply interface circuit, a USB flash drive interface circuit, a power self-locking circuit, a charging circuit, a 7-color light control circuit, and a microphone circuit. The input terminals of the microphone circuit are connected to the first microphone interface and the second microphone interface, respectively. The output terminals of the microphone circuit and the microphone preamplifier circuit are connected to the signal receiving module, respectively. The display circuit is connected to the display screen. The power supply interface circuit is connected to the power supply. The USB flash drive interface circuit is used to connect a USB flash drive. The live streaming phone interface circuit is connected to a live streaming phone. The accompaniment phone interface circuit is connected to an accompaniment phone. The 7-color light control circuit is connected to the 7-color lights. The power self-locking circuit is connected in the power input circuit.

[0025] The beneficial technical effect of this utility model is that it utilizes the car's power supply and is fixed between the car's air conditioning vent and the car MP3 player for karaoke. It transmits the sound to the car's speakers via FM, allowing the driver to not only play music to relieve fatigue while driving, but also sing karaoke while resting and answer phone calls, thus providing convenience for the driver. Attached Figure Description

[0026] Figure 1 This is a front structural view of the present invention;

[0027] Figure 2 This is a structural diagram of the back of this utility model;

[0028] Figure 3 This is an exploded view of the structure of this utility model;

[0029] Figure 4 This is a structural diagram of the motherboard of this utility model;

[0030] Figure 5 This is a schematic diagram of the working principle of this utility model;

[0031] Figure 6 This is the main control circuit diagram of this utility model;

[0032] Figure 7 This is the microphone circuit diagram of this utility model;

[0033] Figure 8 This is a circuit diagram of a live streaming mobile phone interface for this utility model;

[0034] Figure 9 This is the FM transmitter circuit diagram of this utility model;

[0035] Figure 10 This is the microphone preamp circuit diagram of this utility model;

[0036] Figure 11 This is the display circuit diagram of this utility model;

[0037] Figure 12 This is the circuit diagram of the accompaniment mobile phone interface of this utility model;

[0038] Figure 13 This is the circuit diagram of the key encoder of this utility model;

[0039] Figure 14 This utility model relates to a microphone interface circuit.

[0040] Figure 15 This is the power supply self-locking circuit diagram of this utility model;

[0041] Figure 16 This is the circuit diagram of the USB flash drive interface of this utility model;

[0042] Figure 17 This is the power supply interface circuit diagram of this utility model;

[0043] Figure 18 This is the charging circuit diagram of this utility model;

[0044] Figure 19 This is the circuit diagram for the control of a seven-color light in this utility model.

[0045] Figure 20 This is a schematic diagram of the linear voltage regulator circuit of this utility model.

[0046] Explanation of reference numerals in the attached drawings: 1. Fixing device; 11. Ball joint; 12. Tightening nut; 2. Main unit; 21. Front shell; 22. Rear shell; 23. Main board; 231. Accompaniment phone interface; 232. USB interface; 233. Live phone interface; 234. First microphone interface; 235. Power supply interface; 236. Second microphone interface; 237. Audio output interface; 238. Button; 3. Frequency tuning device; 31. Rotary cap; 32. Frequency tuning knob; 4. Display screen; 5. Lighting effect device; 51. Shaft; 51. Lighting effect window; 52. Seven-color light. Detailed Implementation

[0047] The technical solution of this utility model will be further clearly and completely described below with reference to the accompanying drawings and through embodiments. The described embodiments are only some embodiments of this utility model. Other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this utility model.

[0048] Reference Figure 1 , Figure 2 and Figure 3 A car MP3 player for karaoke, mounted on a car air vent, includes a fixing device 1 and a main unit 2. The main unit 2 is equipped with a tuning device 3, a display screen 4, and a lighting effect device 5. The fixing device 1 is used to fix the main unit 2 to the car air vent, and includes a ball joint 11 for fixing the main unit 2 and a tightening nut 12 screwed onto the ball joint 11. The display screen 4 is used to display the working status of the player. The lighting effect device 5 includes a lighting effect window 51 on the main unit 2 and a seven-color light 52 disposed in the lighting effect window 51. The lighting effect device 5 is used to emit flashing seven-color lights to create an atmosphere. The main unit 2 includes a front shell 21, a rear shell 22, and a main board 23. The front shell 21 and the rear shell 22 are fixed to each other and form a cavity. The main board 23 is disposed in the cavity.

[0049] Reference Figure 3-4 The frequency modulation device 3 includes a rotary cap 31 mounted on the host 2 and a frequency modulation knob 32 connected to the rotary cap 31. The frequency modulation knob 32 is connected to the frequency modulation module.

[0050] Reference Figure 3-4 The motherboard 23 includes a live streaming mobile phone interface 233, a first microphone interface 234, a power supply interface 235, a second microphone interface 236 and an audio output interface 237 located on its bottom edge, an accompaniment mobile phone interface 231 and a USB interface 232 located on its top edge, a button 238 located in the center of its front, and control components.

[0051] The first microphone interface 234 and the second microphone interface 236 are used to connect microphones and collect audio signals for karaoke. The live streaming phone interface 233 is connected to the phone via a data cable and is used for live audio input via the phone's OGT data exchange function. The accompaniment phone interface 231 is connected to the phone via a data cable and is used for accompaniment audio input via the phone's OGT data exchange function. The audio output interface 237 is used to connect to a car speaker and output audio signals via a wired connection.

[0052] Reference Figure 6-20 The control component includes:

[0053] The main control module, model BP1048B2, is a high-performance 32-bit DSP Bluetooth audio digital signal processor. This processor features a 32-bit RISC core, supports DSP instructions, and integrates an FPU to support floating-point operations. It can be applied to Bluetooth karaoke devices, Bluetooth portable speakers, Bluetooth portable cases, Bluetooth soundbars, Bluetooth headsets, and various Bluetooth audio and voice application products. This module excels at performing numerous multiplication and addition operations and is suitable for real-time signal processing, digital filtering, and spectrum analysis. In the field of communication, DSP technology can improve transmission efficiency, enhance digital audio quality, achieve high-performance data acquisition and processing, and implement complex control algorithms. This module receives audio signals from a background music phone, a live streaming phone, a first microphone interface 234, and a second microphone interface 236, and outputs audio processing signals, a first control signal, a second control signal, a third control signal, and a fourth control signal based on these audio signals. The main control module is connected to the display screen 4.

[0054] The lighting effect module is connected between the main control module and the seven-color light 52. It is used to receive the first control signal output by the main control module and control the color change and flashing of the seven-color light 52 based on the first control signal.

[0055] The USB flash drive interface module is connected between the main control module and the USB interface 232. It is used to receive the second control signal output by the main control module, read the stored data in the USB flash drive connected to the USB interface 232 in real time, and play it.

[0056] The accompaniment phone interface module is connected between the main control module and the accompaniment phone interface 231. It is used to receive the third control signal output by the main control module and collect the audio signal of the accompaniment music from the accompaniment phone connected to the accompaniment phone interface 231 in real time. It can be used for accompaniment during live broadcasts or karaoke, and can also serve as a data exchange bridge between the mobile phone and the car MP3 player.

[0057] The FM transmitter module is connected to the main control module. It is used to receive the fourth control signal output by the main control module and wirelessly transmit the processed audio signal in frequency modulation through the FM antenna so that the car speaker can receive it at the same frequency.

[0058] The frequency modulation module, connected between the main control module and the FM transmitter module, can adjust the transmission frequency of the audio signal;

[0059] The key encoder module is connected between the main control module and the processing key 238. It is used to process the operation commands input by the key 238 and send the commands to the main control module for execution.

[0060] The charging / power supply module is connected between the main control module and the power source (including car battery, built-in battery, etc.) and is used to charge / power the MP3 player.

[0061] The power amplifier module is connected between the main control module and the car speaker. It is used to receive and amplify the audio processing signal and send it to the car speaker for playback.

[0062] The voltage regulator module is connected between the main control module and the charging / power supply module. It is used for voltage regulation management of the power supply and for overvoltage, overheat, overcurrent and short circuit protection of the power supply circuit to ensure the normal operation of the car MP3 player.

[0063] The Bluetooth module, connected to the main control module, is used to transmit the amplified audio signal from the power amplifier module to the car speaker at close range;

[0064] The signal receiving module is connected between the main control module and the first microphone interface 234 and the second microphone interface 236. It is used to receive audio signals from the wireless microphone and the wired microphone and transmit them to the main control module for processing.

[0065] Reference Figure 1 and Figure 4 When using the car MP3 player, by setting the first microphone interface 234 and the second microphone interface 236, the player can connect two microphones for two people to use and achieve duet singing.

[0066] The car speaker is installed in the driver's cabin of the car and is a standard feature. There can be 2-4 car speakers to achieve separate playback of the left and right audio channels at the lowest cost.

[0067] Reference Figure 4 To facilitate control of the car MP3 player, the motherboard 23 is equipped with several buttons 238, including but not limited to power buttons for controlling the car MP3 player to turn on and off, and volume control buttons for adjusting the playback volume of the car MP3 player.

[0068] Reference Figure 6-20 The main control module consists of the BP1048B2 main control chip and its peripheral circuits. The BP1048B2 main control chip and its peripheral circuits are integrated on the motherboard 23. In order to provide music accompaniment for drivers when singing karaoke and improve the user experience, the BP1048B2 main control chip of the main control module has a built-in reverb unit, which is used to mix the audio signal input from the microphone, the audio signal input from the accompaniment mobile phone and the audio signal input from the live broadcast mobile phone, and output the mixed audio signal to the power amplifier module.

[0069] Specifically, when the main control module receives a reverb command, it uses the reverb unit to mix the audio signal input from the microphone with the audio signal input wirelessly or via wired, so that the listener hears a combination of their own singing voice and the sound of the instrumental accompaniment, achieving a satisfying singing experience.

[0070] Reference Figure 5 To diversify audio signal input methods, the audio signal input methods include a first microphone interface 234, a second microphone interface 236, an accompaniment phone interface 231, and a live streaming phone interface 233. The first microphone interface 234 and the second microphone interface 236 can be connected to wired microphones or wireless microphone audio receivers. The accompaniment phone interface 231 uses the OTC function of the mobile phone to exchange audio data with the in-vehicle MP3 player. The live streaming phone interface 233 can input audio signals.

[0071] To diversify the audio output of the car MP3 player to suit the needs of different devices, the audio output methods include wireless output and wired output, and the wireless output includes Bluetooth output and FM signal transmission output.

[0072] The car speaker is equipped with a signal receiving antenna and a signal receiving module adapted to the FM antenna. The signal receiving module plays the audio signal from the power amplifier module to the outside through the car speaker.

[0073] Reference Figure 6-20 The motherboard 23 includes a main control circuit, a microphone interface circuit, a live streaming phone interface circuit, an accompaniment phone interface circuit, an FM transmitter circuit, a microphone preamplifier circuit, a display circuit, a power supply interface circuit, a USB flash drive interface circuit, a power self-locking circuit, a charging circuit, a seven-color light control circuit, and a microphone circuit. The input terminals of the microphone circuit are connected to the first microphone interface 234 and the second microphone interface 236, respectively. The output terminals of the microphone circuit and the microphone preamplifier circuit are connected to the signal receiving module, respectively. The display circuit is connected to the display screen 4. The power supply interface circuit is connected to the power supply. The USB flash drive interface circuit is used to connect a USB flash drive. The live streaming phone interface circuit is connected to the live streaming phone directly. The accompaniment phone interface circuit is connected to the accompaniment phone. The seven-color light control circuit is connected to the seven-color light 52. The power self-locking circuit is connected in the power input circuit.

[0074] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A karaoke vehicle MP3 player hung on the air outlet of a vehicle, comprising a fixing device (1) and a main machine (2), wherein the main machine (2) is provided with a frequency modulation device (3), a display screen (4) and a lamp effect device (5), the main machine (2) comprises a main board (23), the main board (23) comprises a live mobile phone interface (233), a first microphone interface (234), a power supply interface (235), a second microphone interface (236) and an audio output interface (237) arranged at the bottom edge thereof, a accompaniment mobile phone interface (231) and a USB interface (232) arranged at the top edge thereof and a control assembly, characterized in that, The control component comprises: A master control module, which is connected with a display screen (4) and used for receiving audio signals from a accompaniment mobile phone, a live mobile phone, a first microphone interface (234) and a second microphone interface (236) and outputting audio processing signals, first control signals, second control signals, third control signals and fourth control signals based on the audio signals; A light effect module, which is connected between the master control module and the seven-color lamp (52) and used for receiving the first control signals output by the master control module and controlling the light color transformation and flicker of the seven-color lamp (52) based on the first control signals; A U disk interface module, which is connected between the master control module and a USB interface (232) and used for receiving the second control signals output by the master control module, reading and playing the storage data in a U disk connected with the USB interface (232) in real time; An accompaniment mobile phone interface module, which is connected between the master control module and an accompaniment mobile phone interface (231) and used for receiving the third control signals output by the master control module, collecting audio signals of accompaniment music from an accompaniment mobile phone connected with the accompaniment mobile phone interface (231) in real time and serving as accompaniment for live broadcast or karaoke or as a data exchange bridge between a mobile phone and a vehicle-mounted MP3 player; An FM transmitting module, which is connected with the master control module and used for receiving the fourth control signals output by the master control module and transmitting the processed audio signals to a frequency modulation (FM) antenna in a wireless manner in a frequency modulation mode so as to be received by a vehicle audio speaker at an equal FM frequency; A frequency modulation module, which is connected between the master control module and the FM transmitting module and can adjust the transmission frequency of the audio signals; A key encoder module, which is connected between the master control module and a processing key (238) and used for processing operation instructions input by the processing key (238) and transmitting the instructions to the master control module for execution; A charging and power supply module, which is connected between the master control module and a power supply and used for charging and supplying power to the MP3 player; A power amplifier module, which is connected between the master control module and a vehicle audio speaker and used for receiving and amplifying the audio processing signals and transmitting the audio processing signals to the vehicle audio speaker for playing; A voltage stabilizing module, which is connected between the master control module and the charging and power supply module and used for voltage stabilizing management of the power supply, overvoltage, overheat, overcurrent and short circuit protection of the power supply circuit and ensuring normal operation of the vehicle-mounted MP3 player; A Bluetooth module, which is connected with the master control module and used for transmitting the amplified sound signals of the power amplifier module to the vehicle audio speaker in a short distance; A signal receiving module, which is connected between the master control module and the first microphone interface (234) and the second microphone interface (236) and used for receiving audio signals input by wireless microphones and audio signals input by wired microphones and transmitting the audio signals to the master control module for processing.

2. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The fixing device (1) comprises a ball wrist (11) fixed on a main machine (2) and a screw cap (12) screwed on the ball wrist (11).

3. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The light effect device (5) comprises a light effect window (51) arranged on the main machine (2) and a seven-color lamp (52) arranged in the light effect window (51).

4. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The host (2) further comprises a front shell (21) and a rear shell (22) which are fixed to each other and enclose a cavity, and the main board (23) is arranged in the cavity.

5. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The frequency modulation device (3) comprises a rotating cap (31) arranged on the host (2) and a frequency modulation knob (32) connected with the rotating cap (31), and the frequency modulation knob (32) is connected with a frequency modulation module.

6. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The main board (23) is provided with a plurality of keys (238), and the keys (238) comprise switch keys and volume adjustment keys.

7. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The host control module is composed of a BP1048B2 host control chip and a peripheral circuit thereof, and the BP1048B2 host control chip and the peripheral circuit thereof are integrally arranged on the main board (23).

8. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The signal receiving module can receive wired audio signals through the first microphone interface (234) and the second microphone interface (236), and can also receive wireless audio signals input by a wireless microphone.

9. The karaoke vehicle MP3 player hung in the air outlet of the vehicle according to claim 1, characterized in that, The main board (23) comprises a host control circuit, a microphone interface circuit, a live mobile phone interface circuit, an accompaniment mobile phone interface circuit, an FM transmitting circuit, a microphone preamplifier circuit, a display circuit, a power supply interface circuit, a U disk interface circuit, a power self-locking circuit, a charging circuit, a multicolor lamp control circuit and a microphone circuit, input ends of the microphone circuit are connected with the first microphone interface (234) and the second microphone interface (236) respectively, output ends of the microphone circuit and the microphone preamplifier circuit are connected with the signal receiving module respectively, the display circuit is connected with the display screen (4), the power supply interface circuit is connected with a power supply, the U disk interface circuit is used for plugging a U disk, the live mobile phone interface circuit is connected with a live mobile phone directly, the accompaniment mobile phone interface circuit is connected with an accompaniment mobile phone, the multicolor lamp control circuit is connected with the multicolor lamp (52), and the power self-locking circuit is connected in a power input circuit.

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