Sofa Bluetooth sound equipment control box based on vibration sensor control

Abstract

The invention relates to the technical field of sound sensing, in particular to a Bluetooth sound control box for a sofa based on vibration sensor control. The system comprises a Bluetooth connector, a Y-shaped line, a sound box, a vibration sensor, a power line and a conversion line which are electrically connected. The high-end Bluetooth chip supporting double-host connection is adopted, two mobile phones are paired at the same time, sound sources are automatically switched according to the audio activity state, the trouble of frequent manual switching is avoided, the quick grouping function of the two sofa sound boxes is designed, the grouping mode is started, peripheral equipment is actively scanned, and a safe pairing request is initiated through a channel, so that the safety of the two sofa sound boxes is improved. The host equipment is automatically elected by combining the suffix value of the Bluetooth name, so that the clear and stable network topology is ensured, the technical bottleneck that the traditional Bluetooth point-to-point communication cannot support multi-equipment synchronous playing is solved, and the limitation that the traditional sound equipment layout is limited by wiring and space is broken through.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acoustic sensing, specifically to a sofa Bluetooth sound control box based on vibration sensor control. BACKGROUND

[0002] The sofa Bluetooth sound refers to a sound device with built-in Bluetooth function specially designed for use with sofas or placed around sofas, aiming to provide convenient and high-quality audio experience while perfectly integrating with home environment (especially sofa area) to meet the needs of watching movies, listening to music, playing or relaxing.

[0003] Currently, most Bluetooth speakers support exclusive APP control of mobile phones / tablets, which provides more rich custom functions, remote control and system integration capabilities compared to traditional physical buttons or remote controls, especially suitable for deep user experience and smart home linkage. However, the current sofa Bluetooth sound control box has a single control mode, which is not convenient for two sofas to play the same song of the same sound source, and two speakers are difficult to synchronize, resulting in different sound synchronization and affecting the immersive experience of the scene (such as home theater, living room entertainment, commercial places). Therefore, we propose a sofa Bluetooth sound control box based on vibration sensor control. SUMMARY

[0004] The purpose of the present application is to provide a sofa Bluetooth sound control box based on vibration sensor control. The present application aims to solve the problems of inconvenient operation, difficult multi-user switching, weak collaboration between devices, and complex human-computer interaction in the traditional Bluetooth sound in the home sofa use scene. By deeply integrating the Bluetooth sound system into the sofa structure and introducing the non-inductive control mechanism based on vibration sensor and multi-device intelligent networking technology, the interactive paradigm is upgraded from "passive connection" to "active perception". Although the current smart sofas have functions such as charging and massage, they still rely on mobile phone APP or physical remote control for audio system control, which has a high use threshold for user groups such as the elderly and children who are not familiar with electronic devices, and frequent operation during watching movies or resting seriously affects the coherence of experience. In addition, ordinary Bluetooth speakers only support single device connection, and when multiple people are in the same room, they need to repeatedly disconnect and reconnect, which is complicated for sound source switching and lacks an efficient sharing mechanism. At the same time, two speakers cannot work automatically, making it difficult to build a unified surround sound field and limiting the realization of home theater-level auditory experience.

[0005] To achieve the above purpose, the present application provides a sofa Bluetooth sound control box based on vibration sensor control, which includes a Bluetooth connector, a Y-type line, a sound, a vibration sensor, a power cord and a conversion line connected electrically. The Bluetooth connector supports Bluetooth connection between two mobile phones, enabling switching between Bluetooth audio sources; The vibration sensor is used to sense control commands based on vibration rules, and converts the control commands into control signals via a conversion line to control the Bluetooth connector and the speaker to perform their functions. The control commands include audio source playback commands, Bluetooth connection commands, and team formation commands; The control priority sequence is team command, Bluetooth connection command, and audio source playback command. After executing the team command, the sofa with the largest numerical suffix will be selected as the host device for the Bluetooth connection command.

[0006] As a further improvement to this technical solution, the Bluetooth connector is connected to the vibration sensor via a conversion cable, and a power cord is connected to the Bluetooth connector. The Bluetooth connector is connected to the speaker via a Y-shaped cable.

[0007] As a further improvement to this technical solution, when the Bluetooth connector completes pairing with two mobile phones, it stores two sets of pairing information and uses audio source switching logic to switch the Bluetooth audio source. The audio source switching logic includes automatic switching and manual triggering, wherein: When the Bluetooth connector is turned on, the speaker enters pairing mode and broadcasts its own Bluetooth name.

[0008] As a further improvement to this technical solution, the Y-shaped wire harness is 22AWG diameter UL certified, and the terminal specifications are MX3.0-4P terminal on the left end and two SM-2A terminals on the right end. The power cord harness is AWM2464, with a wire diameter of 20AWG. The left terminal is XHB2.54-2Y; the right terminal is a 0 / 1 female connector + a 0 / 1 male connector. All wiring harnesses are protected by black heat shrink tubing.

[0009] As a further improvement to this technical solution, the Bluetooth connector, Y-cable, speaker, vibration sensor, power cord, and adapter cable are all mounted on the sofa, wherein: The Bluetooth connector is encased and installed on the side wall of the sofa, and the speaker with electrical audio connection is encased and installed at the headrest of the sofa, and the speaker is movably installed at the headrest of the sofa.

[0010] As a further improvement to this technical solution, the vibration rules include: Team formation command: The sofa that initiates the team formation, within 30 seconds of the power cord being connected, taps the vibration sensor four times to pair with another sofa. Note: Both sofas must keep their Bluetooth connectors off the phone. In team formation mode, tap the vibration sensor four times to exit the team formation function. Bluetooth connection command: Tap the vibration sensor twice to turn on the Bluetooth connector; Audio playback commands: When the device is powered on and playing music, tap the vibration sensor twice to switch to the next track, and tap the vibration sensor three times to pause / play the audio.

[0011] As a further improvement to this technical solution, the conversion line also includes a team execution module and a naming preparation module; The team formation execution module is used to receive the team formation command from the vibration sensor of the current sofa, sense the Bluetooth connectors of the surrounding sofas, and initiate a directional connection request. The two parties exchange encryption keys through the L2CAP channel to pair up and form a stable subnet. The naming preparation module is used to parse the Bluetooth names of the sofas to be paired. The sofa with the larger value is forcibly set as the master device, and the remaining sofas are slave devices. Upon receiving a Bluetooth connection command, the system calculates the relative distance between the host device and the mobile phone using BLE ranging. If the relative distance is greater than a distance threshold, a danger signal is issued until the relative distance is less than or equal to the distance threshold.

[0012] As a further improvement to this technical solution, the vibration sensor includes a left sensor and a right sensor. The left sensor is encased and installed inside the left armrest of the sofa, and the right sensor is encased and installed inside the right armrest of the sofa, wherein: Tap the left or right sensor twice to open the Bluetooth connector and trigger the Bluetooth connection command. When the device is powered on and playing music, tap the right sensor twice to switch to the next track, and tap the left sensor twice to switch to the previous track. Tap the left or right sensor three times in quick succession to pause / play; Tap the left or right sensor four times in a row to activate the team-up function and trigger the team-up command.

[0013] As a further improvement to this technical solution, when the team formation command is generated, the prompt tone "Pairing, please wait" is output; after the team formation is successful, the prompt tone "Pairing successful" is output; after the team formation fails, the prompt tone "Pairing failure" is output; and when the team formation is disconnected, the prompt tone "Unpairing complete" is output.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In terms of user experience, by embedding vibration sensors inside the left and right armrests of the sofa, users can simply tap the armrests to complete core operations such as power on / off, play / pause, song skipping, and even pairing two sofas together, completely eliminating the dependence on remote control or smartphone. This is especially suitable for people whose hands are occupied or whose vision is limited, significantly reducing the cognitive load of operation and enhancing the naturalness and convenience of use. At the system intelligence level, a high-end Bluetooth chip supporting dual-host connection is adopted, enabling two mobile phones to pair simultaneously and automatically switch audio sources according to audio activity status, avoiding the hassle of frequent manual switching. A quick team-up function for two sofa speakers is also designed. When team-up mode is activated, the system actively scans for surrounding devices and initiates a secure pairing request through the L2CAP channel. The host device is automatically selected based on the value of the Bluetooth name suffix, ensuring a clear and stable network topology. This solves the technical bottleneck that traditional Bluetooth point-to-point communication cannot support synchronous playback between two devices. On this basis, BLE ranging technology is further introduced to dynamically assess the distance between the mobile phone and the host. If the distance exceeds a preset threshold, the user is prompted to adjust the position or the host is triggered to migrate, effectively ensuring connection reliability and audio transmission quality, and truly realizing an intelligent audio network architecture of "nearby devices control, distant devices coordinate". In terms of application expansion, it is not only suitable for creating a surround sound environment in family living rooms, but also widely applicable to places that require full-area background music coverage, such as hotel reception areas, nursing home rest spaces, and business clubs. Two sofa speakers can seamlessly form distributed audio, eliminating sound field discontinuity and creating a continuous and consistent sound atmosphere, breaking through the limitations of traditional speaker layouts that are restricted by wiring and space. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure assembly of the present invention; Figure 2 This is a block diagram illustrating the overall structural principle of the present invention; Figure 3 This is a schematic diagram of the vibration sensor of the present invention assembled in a sofa; Figure 4 This is a schematic diagram showing the adjustment of the speaker of the present invention mounted on a sofa; Figure 5 This is a schematic diagram of the Y-shaped cable, power cable, and conversion cable of the present invention assembled on a sofa.

[0016] The meanings of the labels in the diagram are as follows: 1. Bluetooth connector; 2. Y-type cable; 3. Speaker; 30. Loudspeaker; 4. Vibration sensor; 41. Left sensor; 42. Right sensor; 5. Power cord; 6. Adapter cable. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1 Please see Figures 1-5 As shown, this embodiment provides a Bluetooth speaker control box for sofas based on vibration sensor control, including a Bluetooth connector 1, a Y-shaped cable 2, a speaker 3, a vibration sensor 4, a power cable 5, and a conversion cable 6, all electrically connected. The Bluetooth connector 1 and the vibration sensor 4 are connected via the conversion cable 6, and the power cable 5 is connected to the Bluetooth connector 1. The Bluetooth connector 1 and the speaker 3 are connected via the Y-shaped cable 2. Wherein: Bluetooth connector 1 measures 130.46*55.16*24.76 mm with a tolerance of 0.5 mm. It supports Bluetooth connection between two mobile phones, enabling switching between Bluetooth audio sources. Specifically, it uses high-end chips (such as Qualcomm QCC series, BES Hengxuan series, Nordic RF5340) to support dual host connection. The Bluetooth device pairs with two mobile phones respectively (storing two sets of pairing information), and two mobile phones can connect to the device simultaneously (only audio transmission requires switching). Furthermore, the audio source switching logic includes automatic switching and manual triggering. In automatic switching, when phone A plays audio, the device responds to A first, and automatically switches to B after A stops. In manual triggering, switching is forced by sending a command through the device button or the mobile APP. The switching is controlled at the protocol layer and the switching request is sent through a custom protocol of the mobile APP command. Only one audio source is allowed to be active at the same time.

[0019] The Y-type cable 2 has a wire diameter of 22AWG and is UL certified. The terminal specifications are MX3.0-4P terminal on the left end and two SM-2A terminals on the right end. The cable is protected by black heat shrink tubing and enables the connection between Bluetooth connector 1 and speaker 3. When Bluetooth connector 1 is turned on, speaker 3 enters pairing mode (LED flashes quickly), broadcasts its own Bluetooth name, and the user searches for and connects to speaker 3 through system settings to complete key exchange. After successful connection, audio data is transmitted via radio frequency (2.4GHz band), using frequency hopping anti-interference (1600 times / second) to establish an A2DP channel, demodulate the radio frequency signal, remove packet headers / check bits, decode compressed audio (such as SBC→PCM), and output to DSP via I2S bus. At the same time, the frequency response curve is dynamically adjusted to distribute the signal to the high / low frequency units (requires multi-channel DAC), and environmental noise is suppressed. The digital PCM signal is converted into an analog waveform and driven by Class D amplifier to output the sound source of speaker 30 connected to speaker 3. The speaker connection cable uses a 2-core sheathed cable with a wire diameter of 22AWG and L=1200mm, and the port is an SM-2Y air connector.

[0020] The power cord 5 uses an AWM2464 wire harness with a wire diameter of 20AWG and a length of L=1000+200mm. The left terminal is XHB2.54-2Y, and the right terminal is a 0 / 1 female connector + a 0 / 1 male connector. Power is transmitted through the power cord 5 to power devices such as the Bluetooth connector 1, speaker 3, and vibration sensor 4. It conducts power from the mains or power source (such as a socket or battery) to the internal circuitry of the devices, forming a closed loop.

[0021] It's worth noting that the vibration sensor 4 is used to sense control commands based on vibration rules. The conversion cable 6 transforms these commands into control signals, which then control the Bluetooth connector 1 and the speaker 3 to perform their functions. Basic control can be achieved without a remote control or mobile app; simply patting the sofa to activate the vibration sensor 4 is enough to operate it, enhancing the seamless interactive experience. This is especially suitable for the elderly, children, or those who cannot easily access their phones during a movie. Control commands include audio source playback commands, Bluetooth connection commands, and team commands; The control priority sequence is team command, Bluetooth connection command, and audio source playback command. After executing the team command, the sofa with the largest numerical suffix will be selected as the host device for the Bluetooth connection command, avoiding pairing conflicts, ensuring stability, and enabling two or more sofa speakers to quickly form a synchronized playback network. This breaks the traditional Bluetooth point-to-point limitation, and the synchronized playback of multiple speakers eliminates sound field breaks, making it suitable for home theaters, living room parties, business reception areas, and other occasions that require surround sound or full coverage.

[0022] To make the entire Bluetooth speaker control box usable on the sofa, such as... Figures 3-5As shown, the Bluetooth connector 1, Y-shaped cable 2, speaker 3, vibration sensor 4, power cord 5, and conversion cable 6 are all installed on the sofa. The Bluetooth connector 1 is wrapped and installed on the side wall of the sofa. The speaker 30, which is electrically connected to the speaker 3, is wrapped and installed in the headrest of the sofa. The speaker 30 is movably installed in the headrest. Specifically, the speaker 30 is movably installed using a movable bracket. The angle of the speaker 30 (built-in speaker 30) can be manually adjusted. When opening the headrest, slowly push it forward until you reach your preferred angle. This allows you to adjust the angle of the speaker 30 according to the angle of your ears, improving the user experience. When closing the headrest, keep pushing it forward and pulling it back until you hear a click sound, returning it to a completely flat position. Therefore, the headrest is equipped with a speaker structure that can be manually adjusted in angle. Combined with the movable bracket, it can achieve personalized positioning of the sound direction, so that the sound can be transmitted to the user's ear canal more accurately, improving the auditory immersion and comfort. When closed, it can also automatically return to its original level, taking into account both aesthetics and practicality.

[0023] Furthermore, in order to distinguish different instructions, such as Figures 1-2 As shown, the vibration rules include: Team formation command: The sofa that initiates the team formation should tap the vibration sensor 4 four times within 30 seconds of the power cord 5 being connected to the power supply to pair with another sofa. Both sofas must keep their Bluetooth connector 1 disconnected from the phone. In team formation mode, tapping the vibration sensor 4 four times will exit the team formation function. Upon entering team formation, you will hear the prompt "Pairing, please wait," followed by "Pairing successful," indicating successful team formation. Team formation failure (e.g., timeout, interference) will be indicated by the prompt "Pairing failure," and disconnecting from team formation will be indicated by the prompt "Unpairing complete." When connecting two sofas (Bluetooth names "Sofa Speaker_Nxxxxx"), the sofa with the larger suffix will be the host device. Bluetooth connection command: With the device powered off, tap the vibration sensor 4 twice to turn on the Bluetooth connector 1; Audio playback commands: When the device is powered on and playing music, tap the vibration sensor 4 twice to switch tracks in audio 3, and tap the vibration sensor 4 three times to pause / play audio 3.

[0024] Among them, the vibration sensor 4 adopts a vibration switch. When it detects a continuous pulse interval within the range of 300±50ms, an amplitude exceeding 0.25g, and a duration of <100ms, it is determined to be a "tapping" action.

[0025] Specifically, conversion line 6 also includes a team execution module and a naming preparation module; The team formation module is used to receive the team formation command from the vibration sensor 4 of the current sofa, sense the Bluetooth connector 1 of the surrounding sofas, and initiate a directional connection request. The two parties exchange encryption keys through the L2CAP channel to pair up and form a stable subnet. Specifically, during the team formation process, the two parties perform MITM authentication through the LE Secure Connections protocol, generate an ECDH shared key, and use AES-CCM to encrypt subsequent communication content. The pairing information is stored in the Flash encryption area and is retained for at least 3 years after power failure. The naming preparation module is used to parse the Bluetooth names of the sofas to be paired. The one with the larger value is forcibly set as the host device, and the other sofas are secondary devices. When a Bluetooth connection command is received, the relative distance between the host device and the mobile phone is calculated by BLE ranging. If the relative distance is greater than the distance threshold (the optimal distance critical point to ensure that the mobile phone's Bluetooth can effectively connect with Bluetooth connector 1), a danger signal is issued to switch the host device until the relative distance is less than or equal to the distance threshold. Note that the position of the mobile phone can also be moved to ensure that the mobile phone's Bluetooth can accurately connect to Bluetooth connector 1 on the sofa, thereby improving the connection accuracy.

[0026] The host device acts as a time reference source, broadcasting a timestamp (based on BT ClockOffset) to all slave devices. Each slave device adjusts its delay through a buffer to ensure that the audio decoding start time deviation is ≤ ±2ms, meeting the synchronization requirement that is imperceptible to the human ear. This enables the host device to connect to a mobile phone via Bluetooth for pairing and playback of audio sources, while the slave devices synchronize with the audio sources.

[0027] Furthermore, the vibration sensor 4 includes a left sensor 41 and a right sensor 42. The left sensor 41 is encased and installed inside the left armrest of the sofa, and the right sensor 42 is encased and installed inside the right armrest of the sofa. When the device is off, tap the left sensor 41 or the right sensor 42 twice to turn on the Bluetooth connector 1. When the device is powered on and playing music, tap the right sensor 42 twice to switch to the next track, and tap the left sensor 41 twice to switch to the previous track. Tap the left sensor 41 or the right sensor 42 three times in succession to pause / play; The pairing function can be activated by tapping the left sensor 41 or the right sensor 42 four times in a row (within 30 seconds of powering on the sofa) and hearing the prompt tone "pairing". This allows the user to operate the device with either hand, improving the convenience of command control.

[0028] In summary, when pairing two sofas, the power is first turned on via power cord 5, which powers the Bluetooth connector 1, vibration sensor 4, speaker 3, loudspeaker 30, and other components. The user on sofa a1 taps the left sensor 41 or the right sensor 42 four times to trigger the pairing command. On one hand, the Bluetooth connectors 1 of the surrounding sofas a2 and a3 sense the Bluetooth signals and send connection requests, exchange encryption keys for pairing. On the other hand, the two Bluetooth connectors 1 announce their own Bluetooth names and store the Bluetooth names in a numbered sequence. When playing audio via Bluetooth, Bluetooth connector 1 is in a powered-off state. A user on any sofa taps the left sensor 41 or right sensor 42 twice to trigger the Bluetooth connection command, turning on Bluetooth connector 1 and selecting the Bluetooth name with the largest suffix value as the host device. At the same time, BLE ranging is used to calculate the distance between the mobile phone Bluetooth and the host device. If the distance is within the distance threshold, the connection is established directly. If the distance exceeds the distance threshold, the user can easily and quickly determine the Bluetooth connector 1 corresponding to the largest suffix value based on the announced Bluetooth name and actively adjust the distance of the mobile phone Bluetooth until it is within the distance threshold for pairing. This process also allows new mobile phone Bluetooths to join for pairing, and the data is stored in the backend for convenient switching at any time.

[0029] Therefore, through collaborative hardware and software design, a sofa-integrated Bluetooth speaker control system was successfully built, integrating seamless interaction, intelligent networking, dual-device interconnection, and adjustable acoustic output. This system not only solves the fundamental defects of existing products in terms of ease of operation, multi-user adaptability, and multi-device collaboration, but also endows furniture with lifelike responsiveness through technological innovations such as vibration sensing command recognition, automatic master-slave device election, and BLE-assisted connection decision-making. This promotes the development of smart homes towards a more humanized, contextualized, and invisible direction, possessing outstanding substantive features and significant technological progress, and has high industrialization prospects and intellectual property protection value.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A Bluetooth speaker control box for sofas based on vibration sensor control, characterized in that, Includes a Bluetooth connector (1) for electrical connection, a Y-type cable (2), an audio speaker (3), a vibration sensor (4), a power cord (5), and a conversion cable (6). The Bluetooth connector (1) supports Bluetooth connection between two mobile phones, enabling switching of Bluetooth audio sources; The vibration sensor (4) is used to sense control commands based on vibration rules, and converts the control commands into control signals through the conversion line (6) to control the Bluetooth connector (1) and the speaker (3) to perform their functions, wherein: The control commands include audio source playback commands, Bluetooth connection commands, and team formation commands; The control priority sequence is team command, Bluetooth connection command, and audio source playback command. After executing the team command, the sofa with the largest numerical suffix will be selected as the host device for the Bluetooth connection command.

2. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 1, characterized in that: The Bluetooth connector (1) is connected to the vibration sensor (4) via a conversion cable (6), and a power cord (5) is connected to the Bluetooth connector (1). The Bluetooth connector (1) is connected to the speaker (3) via a Y-shaped cable (2).

3. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 2, characterized in that: When the Bluetooth connector (1) completes pairing with two mobile phones, it stores two sets of pairing information and uses audio source switching logic to switch the Bluetooth audio source. The audio source switching logic includes automatic switching and manual triggering, wherein: When the Bluetooth connector (1) is turned on, the speaker (3) enters pairing mode and broadcasts its own Bluetooth name.

4. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 3, characterized in that: The Y-type wire (2) has a wire diameter of 22AWG and UL certification, and the terminal specifications are MX3.0-4P terminal on the left end and two SM-2A terminals on the right end. The power cord (5) has an AWM2464 wire harness with a wire diameter of 20AWG. The left terminal is XHB2.54-2Y, and the right terminal is a 0 / 1 female connector + a 0 / 1 male connector. All wiring harnesses are protected by black heat shrink tubing.

5. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 4, characterized in that: The Bluetooth connector (1), Y-wire (2), speaker (3), vibration sensor (4), power cord (5), and adapter cable (6) are all installed on the sofa, wherein: The Bluetooth connector (1) is wrapped and installed on the side wall of the sofa, and the speaker (30) electrically connected to the speaker (3) is wrapped and installed at the headrest of the sofa, and the speaker (30) is movably installed at the headrest of the sofa.

6. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 5, characterized in that: The vibration rules include: Team formation command: The sofa that initiates the team formation taps the vibration sensor (4) four times within 30 seconds of the power cord (5) being connected to the power supply, which will output the pairing with another sofa. The two sofas must keep the Bluetooth connector (1) not connected to the mobile phone. In the team formation state, tap the vibration sensor (4) four times to exit the team formation function. Bluetooth connection command: Tap the vibration sensor (4) twice to turn on the Bluetooth connector (1); Audio playback instructions: When the device is powered on and playing music, tap the vibration sensor (4) twice to switch the audio (3) to the next track, and tap the vibration sensor (4) three times to pause / play the audio (3).

7. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 6, characterized in that: The conversion line (6) also includes a team execution module and a naming preparation module; The team formation module is used to receive the team formation command from the vibration sensor (4) of the current sofa, sense the Bluetooth connector (1) of the surrounding sofas, and initiate a directional connection request. The two parties exchange encryption keys through the L2CAP channel to pair up and form a stable subnet. The naming preparation module is used to parse the Bluetooth names of the sofas to be paired. The sofa with the larger value is forcibly set as the master device, and the remaining sofas are slave devices. Upon receiving a Bluetooth connection command, the system calculates the relative distance between the host device and the mobile phone using BLE ranging. If the relative distance is greater than a distance threshold, a danger signal is issued until the relative distance is less than or equal to the distance threshold.

8. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 6, characterized in that: The vibration sensor (4) includes a left sensor (41) and a right sensor (42). The left sensor (41) is installed inside the left armrest of the sofa, and the right sensor (42) is installed inside the right armrest of the sofa. Tap the left sensor (41) or right sensor (42) twice in succession to open the Bluetooth connector (1) and trigger the Bluetooth connection command; When the device is powered on and playing music, tap the right sensor (42) twice to switch to the next track, and tap the left sensor (41) twice to switch to the previous track. Tap the left sensor (41) or right sensor (42) three times in succession to pause / play; Tap the left sensor (41) or right sensor (42) four times in a row to open the team function and trigger the team command.

9. The Bluetooth speaker control box for sofas based on vibration sensor control according to claim 6, characterized in that: When the team-up command is generated, the prompt tone "Pairing, please wait" is output. After the team-up is successful, the prompt tone "Pairing successful" is output. After the team-up fails, the prompt tone "Pairing failure" is output. When the team-up is disconnected, the prompt tone "Unpairing complete" is output.

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