Modularized sound equipment and bass expansion implementation method thereof

Abstract

The invention relates to the technical field of sound equipment, in particular to modular sound equipment and a bass expansion implementation method thereof, and the modular sound equipment comprises a main sound box body and a low-frequency expansion unit. The bottom of the main sound box body is provided with a power supply contact group, the top of the low-frequency expansion unit is provided with a conducting strip group, electrical connection is formed during combination, and physical adsorption is realized through a magnetic attraction assembly. A Bluetooth signal processing assembly is arranged in the main sound box body, a wireless signal receiving assembly is arranged in the low-frequency expansion unit, and the main sound box body and the low-frequency expansion unit communicate through 2.4 GHz Bluetooth signals. A power management assembly is arranged in the low-frequency expansion unit, and power supply modes can be switched according to the access condition of an external power supply. According to the invention, rapid alignment, stable connection and flexible power supply can be realized, the low-frequency expansion effect is optimized, the cruising ability and vibration resistance of equipment are improved, and the user experience is improved.

Description

Technical Field

[0001] This application relates to the field of audio equipment technology, specifically to a modular audio device and a method for implementing bass extension therein. Background Technology

[0002] In existing technologies, modular speaker systems achieve collaborative operation between the main speaker and subwoofer through physical connections or wireless transmission, which has improved the flexibility and versatility of audio equipment to some extent. However, there is still room for improvement in terms of power supply methods, ease of connection, and optimization of bass extension effects.

[0003] For example, Chinese patent publication number CN112911463B discloses a detachable and combinable smart speaker that uses a touch-sensitive charging connector to provide power to both the main and secondary speaker units, and employs a switch to control the priority of communication signals, thus solving the device connection and identification problem. However, in this solution, the secondary speaker unit relies on the touch-sensitive charging connector of the main speaker unit for power, meaning it cannot operate independently after being detached from the main speaker unit, limiting the versatility of its use cases. Furthermore, this solution does not address the specific implementation method for bass enhancement, resulting in limited optimization of the bass effect.

[0004] The above situation indicates that existing modular audio equipment still has room for improvement in terms of power supply flexibility, independent bass extension function, and ease of connection. Summary of the Invention

[0005] In response to the above, this invention proposes a modular audio device and its bass extension method. By using the spring contact points between the main speaker and the subwoofer for power supply or Bluetooth wireless conduction connection, the bass effect is further optimized, and the flexibility and convenience of the device are improved, thereby adapting to the auditory needs in various scenarios.

[0006] This invention provides a modular audio device, including a main speaker enclosure and a low-frequency expansion unit. At least one power supply contact group is located at the bottom of the main speaker enclosure, and at least one conductive plate group is located at the top of the low-frequency expansion unit. When the main speaker enclosure and the low-frequency expansion unit are combined, the power supply contact group and the conductive plate group form an electrical connection. A Bluetooth signal processing component is installed inside the main speaker enclosure, and a wireless signal receiving component is installed inside the low-frequency expansion unit. The Bluetooth signal processing component and the wireless signal receiving component establish a communication connection via a 2.4GHz Bluetooth signal.

[0007] In a further preferred embodiment, the power supply contact group includes a positive contact, a negative contact, and a guide ring. The positive and negative contacts are respectively embedded in the inner sidewall of the guide ring and maintain a fixed distance. The conductive sheet group includes a positive conductive sheet, a negative conductive sheet, and a positioning groove. The positive and negative conductive sheets are respectively embedded in the bottom surface of the positioning groove and correspond to the position of the power supply contact group. The outer diameter of the guide ring is smaller than the inner diameter of the positioning groove, and the sidewall of the guide ring is provided with several elastic protrusions to achieve automatic alignment and buffering function during assembly.

[0008] In a further preferred embodiment, a magnetic attraction assembly is provided at the bottom of the main speaker enclosure. The magnetic attraction assembly includes several permanent magnets arranged in a ring, with the north pole of each permanent magnet facing outward. A magnetic sheet is provided at the top of the low-frequency extension unit, with the south pole of the magnetic sheet facing the main speaker enclosure. The magnetic attraction assembly has four permanent magnets, which are evenly distributed around the outer periphery of the power supply contact group to enhance the attraction force during assembly and ensure connection stability.

[0009] In a further preferred embodiment, the low-frequency extension unit is internally equipped with a power management component, which includes a rectifier unit, a voltage regulator unit, and a switching switch. The rectifier unit is electrically connected to the conductive sheet group and is used to convert the input current into direct current. The voltage regulator unit is electrically connected to the rectifier unit and is used to adjust the direct current to a preset voltage value. The switching switch is located between the voltage regulator unit and the power amplifier circuit of the low-frequency extension unit and is used to select the power supply mode according to whether the low-frequency extension unit is connected to an external power source.

[0010] In a further preferred embodiment, the Bluetooth signal processing component includes a signal transmitting unit and an audio decoding unit. The signal transmitting unit is used to send audio signals and control commands to the low-frequency extension unit, and the audio decoding unit is used to decode and perform frequency division processing on the received audio signals. The wireless signal receiving component includes a signal receiving unit and a power amplification unit. The signal receiving unit is used to receive audio signals and control commands sent by the main speaker, and the power amplification unit is used to amplify the received audio signals and drive the low-frequency speaker to emit sound.

[0011] In a further preferred embodiment, the bottom of the main speaker enclosure is provided with a silicone anti-slip pad with a thickness of 2 mm, and the bottom of the low-frequency extension unit is provided with a rubber shock-absorbing pad with a thickness of 5 mm, so as to improve the overall stability and vibration resistance of the device.

[0012] This invention also provides a low-frequency extension method for a modular audio device, comprising the following steps: after placing the main speaker enclosure on the low-frequency extension unit, the power supply contact group and the conductive sheet group form an electrical connection, and achieve physical adsorption through a magnetic component; after activating the main speaker enclosure, the Bluetooth signal processing component establishes a communication connection with the wireless signal receiving component of the low-frequency extension unit; when playing audio signals, the main speaker enclosure divides the audio signal into high-frequency and low-frequency bands through the Bluetooth signal processing component, and the low-frequency signal is transmitted to the low-frequency extension unit through the wireless signal receiving component for amplification and to drive the low-frequency speaker to produce sound.

[0013] In a further preferred embodiment, after the main speaker enclosure and the low-frequency expansion unit are combined, the following steps are also included: detecting whether the low-frequency expansion unit is connected to an external power source; if it is connected to an external power source, switching the switch to select the external power supply mode; if it is not connected to an external power source, switching the switch to select the main speaker enclosure power supply mode to extend the device's battery life.

[0014] In a further preferred embodiment, when playing audio signals, the following steps are also included: dynamically adjusting the output power of the low-frequency extension unit according to the frequency characteristics of the audio signal; gradually increasing the output power of the low-frequency extension unit for low-frequency signals to achieve the best listening effect; and independently completing the audio output of the main speaker enclosure for high-frequency signals to avoid interference from the low-frequency extension unit.

[0015] In a further preferred embodiment, the following steps are also included: after the main speaker enclosure is separated from the low-frequency expansion unit, the main speaker enclosure automatically switches to an independent working mode and stops sending audio signals and control commands to the low-frequency expansion unit; the low-frequency expansion unit enters a standby state until it is reassembled with the main speaker enclosure or connected to an external power source.

[0016] The combined design of the main speaker enclosure and the low-frequency extension unit effectively solves the problem of the secondary enclosure relying on the main enclosure for power in existing technologies. Simultaneously, the magnetic components and guide ring design achieve quick alignment and stable connection. The low-frequency extension unit's built-in power management component can flexibly switch power supply modes according to usage scenarios, improving the device's adaptability and battery life. The collaborative work of the Bluetooth signal processing component and the wireless signal receiving component ensures efficient audio signal transmission and accurate frequency division, thereby optimizing the low-frequency extension effect. Furthermore, the selection of materials and structural design for the main speaker enclosure and the low-frequency extension unit not only enhances the device's durability but also significantly improves its vibration resistance and user experience.

[0017] It should be understood that both the foregoing general description and the following detailed description are for illustrative purposes and do not necessarily limit the scope of this disclosure. The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate the subject matter of this disclosure. Furthermore, the specification and drawings serve to explain the principles of this disclosure. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0019] Figure 1 This is a schematic diagram of the first overall structure of the present invention; Figure 2 This is a schematic diagram of the second overall structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the first cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the second cross-sectional structure of the present invention; Figure 6 This is a schematic diagram of the split structure of the main speaker enclosure and the low-frequency extension unit in this invention; Figure 7 This is a schematic diagram of the power supply contact group and conductive sheet group in this invention; Figure 8 This is a flowchart illustrating the low-frequency extension method of the present invention.

[0020] Icons: 1. Main speaker enclosure; 2. Low-frequency extension unit; 3. Power supply contact group; 4. Conductive sheet group; 5. Permanent magnet; 6. Magnetic sheet. Detailed Implementation

[0021] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0022] The modular audio device of the present invention includes a main speaker enclosure 1 and a low-frequency extension unit 2, which are electrically connected to a power supply contact group 3 and a conductive sheet group 4. See also Figures 1 to 7The main speaker enclosure 1 has at least one power supply contact group 3 at its bottom, and the low-frequency expansion unit 2 has at least one conductive sheet group 4 at its top. When the main speaker enclosure 1 is placed on the low-frequency expansion unit 2, the positive and negative contacts in the power supply contact group 3 make contact with the positive and negative conductive sheets in the conductive sheet group 4, respectively. The power supply contact group 3 also includes a guide ring, which is nested outside the positive and negative contacts and fixes their positions, while also providing alignment guidance during assembly. The conductive sheet group 4 has a positioning groove with an inner diameter slightly larger than the outer diameter of the guide ring to ensure that the guide ring can be smoothly inserted into the positioning groove. The sidewall of the guide ring also has several elastic protrusions, which provide a buffering effect when the guide ring is inserted into the positioning groove and enhance the stability after assembly.

[0023] The magnetic assemblies further enhance the connection stability between the main speaker enclosure 1 and the low-frequency extension unit 2. For example... Figure 7 and 8 As shown, the magnetic assembly consists of four permanent magnets 5, which are evenly distributed around the outer periphery of the power supply contact group 3, with the north pole of each permanent magnet 5 facing outwards. Each permanent magnet 5 is made of N52 grade neodymium iron boron material, with a diameter of 10 mm and a height of 5 mm. When the distance between it and the magnetic sheet is ≤2 mm, it generates an attraction force of ≥0.5N to ensure a stable connection during assembly. The top of the low-frequency extension unit 2 is equipped with a magnetic sheet 6, with its south pole facing the main speaker enclosure 1. When the main speaker enclosure 1 and the low-frequency extension unit 2 are combined, an attraction force is generated between the permanent magnets 5 and the magnetic sheet 6, thereby ensuring a tight fit between the two. This magnetic design not only improves the convenience of assembly but also avoids separation problems caused by external forces.

[0024] The low-frequency extension unit 2 has an internal power management component for controlling the switching of power supply modes. For example... Figure 4 , Figure 5 and Figure 6 As shown, the power management components include a rectifier unit, a voltage regulator unit, and a switching switch. The rectifier unit is connected to the conductive sheet group 4 and is used to convert the input current into DC power. The voltage regulator unit is connected to the rectifier unit and is used to adjust the DC power to a preset voltage value to meet the needs of the internal circuitry of the low-frequency extension unit 2. The switching switch is located between the voltage regulator unit and the power amplifier circuit of the low-frequency extension unit 2, and includes a voltage comparator circuit. When an external power input voltage ≥ 5V is detected, it automatically switches to the external power supply mode; otherwise, it switches to the main speaker cabinet power supply mode. When the low-frequency extension unit 2 is not connected to an external power source, the switching switch selects the main speaker cabinet 1 power supply mode; when the low-frequency extension unit 2 is connected to an external power source, the switching switch automatically switches to the external power supply mode, thereby extending the overall battery life of the device.

[0025] The main speaker enclosure 1 houses a Bluetooth signal processing component, which includes a signal transmitting unit and an audio decoding unit. The signal transmitting unit sends audio signals and control commands to the low-frequency extension unit 2, while the audio decoding unit decodes and divides the received audio signals. The low-frequency extension unit 2 houses a wireless signal receiving component, which includes a signal receiving unit and a power amplification unit. The signal receiving unit receives the audio signals and control commands sent by the main speaker enclosure 1, while the power amplification unit amplifies the audio signals and drives the low-frequency speaker. Through the coordinated operation of the Bluetooth signal processing component and the wireless signal receiving component, the main speaker enclosure 1 can divide the audio signal into high-frequency and low-frequency bands. The low-frequency signal is transmitted to the low-frequency extension unit 2 for processing, while the high-frequency signal is output independently by the main speaker enclosure 1.

[0026] The main speaker enclosure 1 is made of aluminum alloy and anodized to improve corrosion resistance and aesthetics. The low-frequency extension unit 2 is made of engineering plastic with internal reinforcing ribs to enhance overall strength. The bottom of the main speaker enclosure 1 has a 2mm thick silicone anti-slip pad, while the bottom of the low-frequency extension unit 2 has a 5mm thick rubber shock-absorbing foot. These designs not only improve the device's vibration resistance but also enhance the user experience.

[0027] In practical applications, the user places the main speaker enclosure 1 on the low-frequency expansion unit 2, establishing an electrical connection between the power supply contact group 3 and the conductive sheet group 4, while the magnetic component is attracted to the magnetic sheet 6. Upon activating the main speaker enclosure 1, the Bluetooth signal processing component establishes a communication connection with the wireless signal receiving component. When playing audio signals, the main speaker enclosure 1 uses the Bluetooth signal processing component to separate the audio signal into high-frequency and low-frequency bands. The low-frequency signal is transmitted to the low-frequency expansion unit 2 via the wireless signal receiving component, and after processing by the power amplification unit, it drives the low-frequency speaker to produce sound. For the high-frequency signal, the main speaker enclosure 1 independently outputs audio, avoiding interference from the low-frequency expansion unit 2.

[0028] After the main speaker enclosure 1 and the low-frequency expansion unit 2 are combined, the system will detect whether the low-frequency expansion unit 2 is connected to an external power source. If an external power source is connected, the switch will select the external power supply mode; if no external power source is connected, the switch will select the main speaker enclosure 1 power supply mode. When playing audio signals, the system will dynamically adjust the output power of the low-frequency expansion unit 2 according to the frequency characteristics of the audio signal. For low-frequency signals, the output power of the low-frequency expansion unit 2 will be gradually increased to achieve the best listening effect; for high-frequency signals, the main speaker enclosure 1 will independently complete the audio output. When the main speaker enclosure 1 and the low-frequency expansion unit 2 are separated, the main speaker enclosure 1 will automatically switch to independent working mode, stop sending audio signals and control commands to the low-frequency expansion unit 2, and the low-frequency expansion unit 2 will enter standby mode until it is combined with the main speaker enclosure 1 again or connected to an external power source.

[0029] This invention solves the problem of secondary enclosures relying on the main enclosure for power in existing technologies by combining the main speaker enclosure 1 and the low-frequency extension unit 2. Simultaneously, the design of the magnetic assembly and guide ring achieves rapid alignment and stable connection. The power management component built into the low-frequency extension unit 2 can flexibly switch power supply modes according to the usage scenario, improving the device's adaptability and battery life. The collaborative work of the Bluetooth signal processing component and the wireless signal receiving component ensures efficient audio signal transmission and accurate frequency division processing, thereby optimizing the low-frequency extension effect. Furthermore, the selection of shell materials and structural design of the main speaker enclosure 1 and the low-frequency extension unit 2 not only enhances the device's durability but also significantly improves its vibration resistance and user experience.

[0030] To enable those skilled in the art to fully understand and implement this invention, the specific implementation principle of this invention will be further explained below in conjunction with a specific application scenario.

[0031] When using the modular audio equipment, the user first places the main speaker enclosure 1 on top of the low-frequency expansion unit 2. At this time, the positive and negative contacts in the power supply contact group 3 make contact with the positive and negative conductive plates in the conductive plate group 4, respectively. The guide ring is nested on the outside of the positive and negative contacts, and its elastic protrusions on its sidewalls fit tightly against the inner wall of the positioning groove, thus ensuring precise alignment between the main speaker enclosure 1 and the low-frequency expansion unit 2. This design not only simplifies the user's operation but also avoids poor contact caused by alignment deviations. At the same time, the permanent magnet 5 in the magnetic assembly generates an attractive force with the magnetic plate 6 on top of the low-frequency expansion unit 2, further enhancing the connection stability between the two and preventing accidental separation under external force.

[0032] After the main speaker enclosure 1 and the low-frequency expansion unit 2 are assembled, the system automatically detects whether the low-frequency expansion unit 2 is connected to an external power source. If no external power source is connected, the switch selects the main speaker enclosure 1 power supply mode. At this time, the main speaker enclosure 1 supplies power to the low-frequency expansion unit 2 through the power supply contact group 3. The rectifier unit converts the input current into DC power, and the voltage regulator unit adjusts the DC power to a preset voltage value to meet the needs of the internal circuitry of the low-frequency expansion unit 2. If the low-frequency expansion unit 2 is connected to an external power source, the switch automatically switches to the external power supply mode, thereby reducing the power consumption of the main speaker enclosure 1 and extending the overall battery life.

[0033] After the main speaker enclosure 1 is activated, the Bluetooth signal processing component and the wireless signal receiving component establish a communication connection. The signal transmitting unit sends audio signals and control commands to the low-frequency expansion unit 2, and the signal receiving unit receives these signals and transmits them to the power amplification unit. The audio decoding unit performs frequency division processing on the received audio signals, keeping the high-frequency signals independently output in the main speaker enclosure 1, while the low-frequency signals are transmitted to the low-frequency expansion unit 2 for amplification. The power amplification unit amplifies the low-frequency signals, driving the low-frequency speaker to produce sound, thereby significantly improving the low-frequency effect. Through this frequency division processing method, the main speaker enclosure 1 and the low-frequency expansion unit 2 can work together to achieve a more immersive listening experience.

[0034] During audio signal playback, the system dynamically adjusts the output power of the low-frequency extension unit 2 based on the frequency characteristics of the audio signal. For low-frequency signals, the system gradually increases the output power of the low-frequency extension unit 2 to achieve the best listening effect; while for high-frequency signals, the main speaker enclosure 1 independently completes the audio output, avoiding interference from the low-frequency extension unit 2. This dynamic adjustment mechanism ensures efficient transmission and accurate frequency division of the audio signal, optimizing the low-frequency extension effect.

[0035] When the user needs to use the main speaker enclosure 1 independently, they simply need to remove it from the low-frequency extension unit 2. At this time, the main speaker enclosure 1 automatically switches to independent operating mode, ceasing to send audio signals and control commands to the low-frequency extension unit 2. The low-frequency extension unit 2 enters standby mode until it is reassembled with the main speaker enclosure 1 or connected to an external power source. This design solves the problem of secondary enclosures relying on the main enclosure for power in existing technologies, improving the flexibility and adaptability of the device.

[0036] Furthermore, the aluminum alloy casing of the main speaker enclosure 1 undergoes anodizing, providing excellent corrosion resistance and aesthetics, while the low-frequency extension unit 2 is made of engineering plastic with built-in reinforcing ribs, enhancing overall strength. The silicone anti-slip pads on the bottom of the main speaker enclosure 1 and the rubber shock-absorbing feet on the bottom of the low-frequency extension unit 2 not only improve the device's vibration resistance but also enhance the user experience. These structural design details collectively ensure the device's stability and durability in various scenarios.

[0037] In summary, this invention achieves a convenient and stable connection method through the combined design of the main speaker enclosure 1 and the low-frequency extension unit 2, along with the quick alignment function of the magnetic components and guide ring. The power management component built into the low-frequency extension unit 2 can flexibly switch power supply modes according to the usage scenario, while the collaborative work of the Bluetooth signal processing component and the wireless signal receiving component ensures efficient transmission and accurate frequency division of audio signals. Ultimately, this modular audio device can meet the diverse listening needs of users in different scenarios, while also possessing excellent vibration resistance and user experience.

[0038] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0039] In the description of this disclosure, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure 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, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0041] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0042] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A modular audio device, comprising a main speaker enclosure (1) and a low-frequency extension unit (2), characterized in that, The bottom of the main speaker enclosure (1) is provided with at least one power supply contact group (3), and the top of the low frequency expansion unit (2) is provided with at least one conductive sheet group (4). When the main speaker enclosure (1) and the low frequency expansion unit (2) are combined, the power supply contact group (3) and the conductive sheet group (4) form an electrical connection. The main speaker enclosure (1) is equipped with a Bluetooth signal processing component, and the low-frequency extension unit (2) is equipped with a wireless signal receiving component. The Bluetooth signal processing component and the wireless signal receiving component establish a communication connection through a 2.4GHz Bluetooth signal.

2. The modular audio device according to claim 1, characterized in that, The power supply contact group (3) includes a positive contact, a negative contact and a guide ring. The positive contact and the negative contact are respectively embedded in the inner sidewall of the guide ring and maintain a fixed distance. The conductive sheet group (4) includes a positive electrode conductive sheet, a negative electrode conductive sheet and a positioning groove. The positive electrode conductive sheet and the negative electrode conductive sheet are respectively embedded in the bottom surface of the positioning groove and correspond to the position of the power supply contact group (3). The outer diameter of the guide ring is smaller than the inner diameter of the positioning groove, and the sidewall of the guide ring is provided with several elastic protrusions.

3. The modular audio device according to claim 1, characterized in that, The bottom of the main speaker enclosure (1) is provided with a magnetic attraction assembly, which includes a number of permanent magnets (5) arranged in a ring, with the north pole of each permanent magnet (5) facing outward. The low-frequency extension unit (2) is provided with a magnetic sheet (6) on top, with the south pole of the magnetic sheet (6) facing the main speaker enclosure (1). The magnetic attraction assembly has four permanent magnets (5), which are evenly distributed around the outer periphery of the power supply contact group (3).

4. The modular audio device according to claim 3, characterized in that, The low-frequency extension unit (2) is internally equipped with a power management component, which includes a rectifier unit, a voltage regulator unit, and a switching switch; The rectifier unit is electrically connected to the conductive sheet group (4) and is used to convert the input current into direct current. The voltage regulator unit is electrically connected to the rectifier unit and is used to adjust the DC power to a preset voltage value; The switching switch is located between the power amplifier circuit of the voltage regulator unit and the low-frequency expansion unit (2) and is used to select the power supply mode according to whether the low-frequency expansion unit (2) is connected to an external power supply.

5. The modular audio device according to claim 1, characterized in that, The Bluetooth signal processing component includes a signal transmitting unit and an audio decoding unit. The signal transmitting unit is used to send audio signals and control commands to the low-frequency extension unit (2). The audio decoding unit is used to decode and divide the received audio signals. The wireless signal receiving component includes a signal receiving unit and a power amplification unit. The signal receiving unit is used to receive audio signals and control commands sent by the main speaker (1). The power amplification unit is used to amplify the received audio signals and drive the low-frequency speaker to produce sound.

6. The modular audio device according to claim 3, characterized in that, The bottom of the main speaker enclosure (1) is provided with a silicone anti-slip pad, and the bottom of the low-frequency extension unit (2) is provided with a rubber shock-absorbing foot pad.

7. A method for implementing low-frequency extension in a modular audio device, applied to the modular audio device according to any one of claims 1 to 6, characterized in that, Includes the following steps: After the main speaker enclosure is placed on the low-frequency extension unit, the power supply contact group and the conductive sheet group form an electrical connection, and physical adsorption is achieved through the magnetic adsorption component; After the main speaker is activated, the Bluetooth signal processing component establishes a communication connection with the wireless signal receiving component of the low-frequency extension unit; When playing audio signals, the main speaker divides the audio signal into high-frequency and low-frequency bands through the Bluetooth signal processing component. The low-frequency signal is transmitted to the low-frequency extension unit through the wireless signal receiving component for amplification and to drive the low-frequency speaker to produce sound.

8. The method for implementing low-frequency extension in a modular audio device according to claim 7, characterized in that, After the main speaker enclosure and low-frequency extension unit are combined, the following steps are also included: Detect whether the low-frequency extension unit is connected to an external power source. If it is connected to an external power source, switch the switch to select the external power supply mode. If no external power supply is connected, select the main speaker cabinet power supply mode using the toggle switch.

9. The method for implementing low-frequency extension in a modular audio device according to claim 7, characterized in that, When playing an audio signal, the following steps are also included: The output power of the low-frequency extension unit is dynamically adjusted according to the frequency characteristics of the audio signal. For low-frequency signals, gradually increase the output power of the low-frequency extension unit; For high-frequency signals, the main speaker enclosure independently completes the audio output.

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