[0023] In order to fully understand the technical content of the present invention, the technical solution of the present invention will be further introduced and illustrated below in conjunction with specific embodiments.
[0024] Such as figure 1 As shown, the vehicle-mounted Bluetooth playback device of this embodiment includes a vehicle-mounted terminal 20 inserted into the power port 10 in the vehicle and having a playback function, a Bluetooth headset 30, and a remote control terminal 40 for wirelessly controlling the mobile terminal 50. The Bluetooth headset 30 is wirelessly connected with the mobile terminal 50 via Bluetooth to transmit audio or control commands, while the remote control terminal 40 is wirelessly connected with the Bluetooth headset 30, and the remote control terminal 40 controls the mobile terminal 40 through the Bluetooth headset 30. The Bluetooth headset 30 is physically and electrically connected with the vehicle terminal 20 to charge the Bluetooth headset 30 and transmit audio to the vehicle terminal 20 for playback.
[0025] One end of the vehicle-mounted terminal 20 can be inserted into the power port 10 in the vehicle to obtain electricity, and at the same time, the vehicle-mounted terminal 20 can charge external electronic devices, such as mobile phones, tablet computers, and vehicle navigators. In addition, the vehicle-mounted terminal 20 also has an FM transmitting function, which can transmit audio to the center console in the vehicle to receive and play the audio through FM. Such as figure 2 As shown, specifically, the in-vehicle terminal 20 includes a step-down circuit 21 and a USB circuit 22 for charging, and the USB circuit 22 is electrically connected to the step-down circuit 21. The step-down circuit 21 is electrically connected to the in-vehicle power port 10 to reduce the voltage, and the USB circuit 22 is responsible for transmitting the step-down power to external electronic devices. The connection of specific circuit components in the step-down circuit 21 and the USB circuit 22 is in the prior art, and will not be repeated here.
[0026] Such as figure 2 As shown, the vehicle-mounted terminal 20 also includes a power amplifier circuit 23 and an FM circuit 24 electrically connected to the step-down circuit 21 respectively. When the Bluetooth headset 30 is physically and electrically connected to the vehicle terminal 20, the power amplifier circuit 23 and the FM circuit 24 are electrically connected to the Bluetooth headset 30, respectively. The power amplifier circuit 23 is used to play some built-in pre-stored voice prompt information, such as a welcome phrase, a phrase whether the connection is successful, etc. The FM circuit 24 is used to play audio information transmitted by the mobile terminal 50 from the Bluetooth headset 30, such as the phone answered, the music played, the prompt sound of the mobile terminal 50, and so on. The FM circuit 24 is connected with a transmitting antenna to transmit the FM signal to the outside. The connection modes of the specific circuit components in the power amplifier circuit 23 and the FM circuit 24 are in the prior art, and will not be repeated here.
[0027] The vehicle terminal 20 has a physical interface connected with the Bluetooth headset 30 and the remote control terminal 40, and the Bluetooth headset 30 is directly electrically connected to the electronic components inside the vehicle terminal 20 through the physical interface. The Bluetooth headset 30 includes a Bluetooth chip 31, a power supply 37, a speaker 33, a memory 35 pre-stored with voice prompt information, and a detection circuit 32 for detecting whether the Bluetooth headset 30 is electrically connected to the vehicle terminal 20. The Bluetooth chip 31 is electrically connected to the power supply 37, the memory 35 and the detection circuit 32, and the speaker 33 is electrically connected to the detection circuit 32. When the Bluetooth headset 30 is directly physically and electrically connected to the vehicle terminal 20, the Bluetooth chip 31 is electrically connected to the power amplifier circuit 23 and the FM circuit 24, and the detection circuit 32 is electrically connected to the power amplifier circuit 23 and the FM circuit 24, respectively. When the Bluetooth headset 30 is disconnected from the vehicle terminal 20 physically and electrically, the detection circuit 32 is disconnected from the power amplifier circuit 23 and the FM circuit 24 and the Bluetooth chip 31 transmits the audio to the speaker 33 through the detection circuit 32 for playback.
[0028] Such as Figure 4 As shown, specifically, the detection circuit 32 includes two switch chips U1 and U2, and the switch chips U1 and U2 are single-channel analog switch chips with a model of SGM3157. The input terminals of the switch chips U1 and U2 are electrically connected to the Bluetooth chip 31. When the detection terminals I04 of the switch chips U1 and U2 are electrically connected to the vehicle terminal 20, the output terminals I02 of the switch chips U1 and U2 are electrically connected to the vehicle terminal 20 to transmit audio. When the detection terminals I04 of the switch chips U1 and U2 are disconnected from the electrical connection with the vehicle terminal 20, the output terminals I01 of the switch chips U1 and U2 output audio to the speaker 33 of the Bluetooth headset 30. Such as Figure 4 As shown, a capacitor C21 and a resistor R10 are connected in series between the output terminal I01 of the switch chip U1 and the speaker 33 of the Bluetooth headset 30, and a capacitor C63 and a resistor R10 are connected in series between the output terminal I01 of the switch chip U2 and the speaker 33 of the Bluetooth headset 30. Resistance R22. The output terminal I02 of the switch chip U1 is connected in series with a capacitor C64, and the output terminal I02 of the switch chip U2 is connected in series with a capacitor C65.
[0029] It can be seen that the detection circuit 32 has a function of switching audio output. When it is necessary to listen to voice feedback or audio-visual entertainment information, the Bluetooth headset 30 can be placed in the vehicle terminal 20 and establish a physical electrical connection with the vehicle terminal 20, and the detection circuit 32 transmits the audio transmitted to the Bluetooth headset 30 on the Bluetooth chip 31 to the vehicle terminal 20 broadcast through FM. When you need to answer a private call and there are other people in the car, you can directly pick up the Bluetooth headset 30 from the car terminal 20 and put it into your ear to answer. The detection circuit 32 will directly transmit the audio to the speaker 33 of the Bluetooth headset 30 for playback. , Thereby ensuring the protection of personal privacy. Therefore, in the case of providing in-vehicle entertainment or voice answering, the in-vehicle Bluetooth playback device of this embodiment can also fully ensure that users can protect their own privacy, enhance its functionality, and improve user experience.
[0030] The bluetooth chip 31 of the bluetooth headset 30 needs to be one belt two, that is, the remote control terminal 40 and the mobile terminal 50 (mobile phone or tablet computer, etc.) are connected wirelessly by bluetooth. Therefore, the bluetooth chip 31 should adopt a chip supporting Bluetooth 4.0, such as an ATS2825 chip.
[0031] In addition, the Bluetooth headset 30 further includes a button circuit 36 which is electrically connected to the Bluetooth chip 31. The key circuit 36 is used to control actions such as playing or answering a call of the mobile terminal 50. The button circuit 36 is used to control actions such as connecting or hanging up a call, playing the next song, the previous song, pausing playback, turning off/on the Bluetooth headset 30, and starting the voice function. The Bluetooth headset 30 also includes a microphone 34 electrically connected to the Bluetooth chip 31. After the voice control function is turned on through the button circuit 36, the user can speak a voice command through the microphone 34 of the Bluetooth headset 30, and the Bluetooth headset 30 transmits the voice command to the mobile terminal 50 Perform cloud recognition, and finally execute the returned voice command to achieve the action required by the user.
[0032] In this embodiment, the remote control terminal 40 may be a wearable bracelet, finger ring or collar, or a portable device with the remote control terminal 40 installed on a steering wheel. As a better choice, the remote control terminal 40 should be made into a finger ring or a portable device installed on the steering wheel to make it easier for the user to control. The difference between the internal electronic components of the remote control terminal 40 and the electronic components of the Bluetooth headset 30 is that the remote control terminal 40 does not have a speaker. Specifically, the remote control terminal 40 includes a Bluetooth module 41, a battery 46, and a button circuit 45. Among them, the remote control terminal 40 is wirelessly connected to the Bluetooth headset 30 via the Bluetooth module 41, and the Bluetooth module 41 is electrically connected to the battery 46 and the button circuit 45, respectively. The button circuit 45 is used to control actions such as connecting or hanging up the phone, playing the next song, the previous song, pausing playback, turning off/on the remote control terminal 40, and starting the voice function. The remote control terminal 40 also includes a microphone 44 electrically connected to the Bluetooth module 41. After the voice function is turned on through the button circuit 45, the user can speak a voice command through the microphone 44. The voice command is transmitted to the Bluetooth headset 30 through the Bluetooth module 41, and the Bluetooth headset 30 The voice command is transmitted to the mobile terminal 50 for cloud recognition, and finally the returned voice command is executed to realize the action required by the user.
[0033] In addition, such as figure 2 As shown, the remote control terminal 40 further includes a detection circuit 42 for detecting whether the remote control terminal 40 is electrically connected to the vehicle-mounted terminal 20, and the detection circuit 42 is electrically connected to the Bluetooth module 41. Such as image 3 As shown, when the remote control terminal 40 is electrically connected to the vehicle terminal 20, the detection circuit 42 is electrically connected to the power amplifier circuit 23 and the FM circuit 24 of the vehicle terminal 20, and the Bluetooth module 41 is respectively connected to the power amplifier circuit 23 and the FM circuit 24 of the vehicle terminal 20. Electric connection. Such as image 3 As shown, when the remote control terminal 40 is electrically connected to the vehicle-mounted terminal 20, the remote control terminal 40 can be charged by the power supply of the vehicle-mounted terminal 20, and the vehicle-mounted terminal 20 charges the battery 46 of the remote control terminal 40 through the Bluetooth module 41.
[0034] In addition, such as figure 2 As shown, the remote control terminal 40 also includes a memory 43 pre-stored with voice prompt information, and the memory 43 is electrically connected to the Bluetooth module 41. Such as image 3 As shown, when the remote control terminal 40 is electrically connected to the vehicle-mounted terminal 20, the voice prompt information in the memory 43 can be played through the vehicle-mounted terminal 20.
[0035] The above statement only uses examples to further illustrate the technical content of the present invention for easier understanding of the reader, but it does not mean that the implementation of the present invention is limited to this. Any technical extension or re-creation made according to the present invention shall be subject to this Protection of inventions.
