Intelligent sound box

Abstract

The invention discloses intelligent sound equipment, and relates to the technical field of sound equipment, the intelligent sound equipment comprises a shell, a first partition plate, a second partition plate, a high-frequency loudspeaker, a full-frequency loudspeaker and a radiation unit, and the shell is provided with an accommodating cavity; the first partition plate and the second partition plate are arranged in the containing cavity at intervals so as to divide the containing cavity into a high-frequency cavity, an intermediate-frequency cavity and a low-frequency cavity which are sequentially arranged, the size of the high-frequency cavity is smaller than that of the intermediate-frequency cavity, the size of the intermediate-frequency cavity is smaller than that of the low-frequency cavity, and the high-frequency loudspeaker is arranged in the high-frequency cavity. The full-frequency loudspeaker is arranged in the intermediate-frequency cavity, the second partition plate is provided with a frequency division unit communicated with the intermediate-frequency cavity and the low-frequency cavity, the frequency division unit is used for scattering and absorbing medium-high frequency sound waves and keeping propagation of low-frequency sound waves, and the radiation unit is arranged in the low-frequency cavity; the radiation unit is used for receiving low-frequency sound waves which are emitted by the full-frequency loudspeaker and are transmitted to the low-frequency cavity through the frequency division unit so as to enhance low-frequency response.

Description

Technical Field

[0001] The present invention relates to the technical field of audio equipment, and in particular to an intelligent audio system. Background Art

[0002] Smart speakers are modern audio devices that integrate artificial intelligence technology, providing a rich user experience through voice interaction, networking capabilities, and smart home control. However, traditional smart speakers generally suffer from poor acoustic performance.

[0003] Therefore, it is necessary to provide a new smart speaker to solve the above technical problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide a smart speaker, aiming to solve the technical problem of poor acoustic performance of smart speakers.

[0005] To achieve the above-mentioned objectives, the present invention proposes an intelligent speaker, comprising a shell, a first baffle, a second baffle, a high-frequency speaker, a full-range speaker and a radiation unit, wherein the shell is provided with a accommodating cavity; the first baffle and the second baffle are arranged in the accommodating cavity at intervals to divide the accommodating cavity into a high-frequency chamber, a medium-frequency chamber and a low-frequency chamber arranged in sequence, and the volume of the high-frequency chamber is smaller than the volume of the medium-frequency chamber, and the volume of the medium-frequency chamber is smaller than the volume of the low-frequency chamber, the high-frequency speaker is arranged in the high-frequency chamber, and the full-range speaker is arranged in the medium-frequency chamber, the second baffle is provided with a frequency division unit connecting the medium-frequency chamber and the low-frequency chamber, the frequency division unit is used to scatter and absorb medium and high-frequency sound waves and maintain the propagation of low-frequency sound waves, and the radiation unit is arranged in the low-frequency chamber; the radiation unit is used to receive low-frequency sound waves emitted by the full-range speaker and propagated to the low-frequency chamber through the frequency division unit, so as to enhance the low-frequency response. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0007] Figure 1 This is a schematic diagram of the structure of a smart speaker in one embodiment of the present invention;

[0008] Figure 2 A schematic structural diagram of a frequency division unit in an embodiment of the present invention;

[0009] Figure 3 A schematic structural diagram of a frequency division unit in another embodiment of the present invention;

[0010] Figure 4 A schematic structural diagram of an acoustic diffusion structure in an embodiment of the present invention.

[0011] Description of Figure Numbers:

[0012] 100. Housing; 110. High-frequency chamber; 111. Sound outlet; 112. Sound wave guide block; 120. Medium-frequency chamber; 121. Acoustic diffusion structure; 1211. First cone block; 1212. Second cone block; 1313. Third cone block; 130. Low-frequency chamber; 131. Mounting cylinder; 132. Mounting groove; 200. First partition; 300. Second partition; 310. Crossover unit; 311. Crossover channel; 312. Annular groove; 313. Chamfer; 400. High-frequency speaker; 500. Full-range speaker; 600. Radiation unit; 610. Elastic member; 620. Support member.

[0013] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0015] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0016] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0017] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0018] Smart speakers are modern audio devices that integrate artificial intelligence technology. They can provide a rich user experience through voice interaction, networking functions, and smart home control. Smart speakers are mainly composed of components such as a casing, a speaker system, and a main control circuit. During the actual research and development process, researchers found that traditional smart speakers usually use a single-cavity design, that is, all speakers are installed in the same cavity. However, this will have different degrees of impact on the propagation characteristics of sound waves in different frequency bands, resulting in uneven responses of high frequency, mid-frequency, and low frequency. Moreover, due to the size of the speakers, the low-frequency performance generally lacks a sense of heaviness, which cannot meet the user's usage needs and will also affect the user's listening experience.

[0019] The present invention proposes an intelligent speaker, aiming to solve the technical problem of poor acoustic performance existing in intelligent speakers.

[0020] See also Figure 1 In one embodiment of the present invention, the smart speaker includes a housing 100, a first baffle 200, a second baffle 300, a high-frequency speaker 400, a full-range speaker 500, and a radiation unit 600. The housing 100 is provided with a receiving cavity; the first baffle 200 and the second baffle 300 are arranged in the receiving cavity at intervals to separate the receiving cavity into a high-frequency chamber 110, a mid-frequency chamber 120, and a low-frequency chamber 130 arranged in sequence, and the volume of the high-frequency chamber 110 is smaller than the volume of the mid-frequency chamber 120, and the volume of the mid-frequency chamber 120 is smaller than the volume of the low-frequency chamber 130. The high-frequency speaker 400 is arranged in the high-frequency chamber 110, the full-range speaker 500 is arranged in the intermediate-frequency chamber 120, and the second partition 300 is provided with a crossover unit 310 connecting the intermediate-frequency chamber 120 and the low-frequency chamber 130. The crossover unit 310 is used to scatter and absorb medium and high-frequency sound waves and maintain the propagation of low-frequency sound waves. The radiation unit 600 is arranged in the low-frequency chamber 130; the radiation unit 600 is used to receive the low-frequency sound waves emitted by the full-range speaker 500 and propagated to the low-frequency chamber 130 through the crossover unit 310 to enhance the low-frequency response.

[0021] The technical solution of the present invention improves the clarity and positioning of sound and makes the response of sound waves more balanced by using partitions to divide the accommodating cavity into a high-frequency cavity 110, a mid-frequency cavity 120, and a low-frequency cavity 130 of gradually increasing volume. At the same time, the use of radiation units 600 to enhance the low-frequency response can enhance the sense of weight of the sound, thereby improving the user's listening experience. In this embodiment, the first partition 200 and the second partition 300 are arranged at intervals within the accommodating cavity and divide the accommodating cavity into the high-frequency cavity 110, the mid-frequency cavity 120, and the low-frequency cavity 130, which are arranged in sequence and have gradually increasing volume. The first partition 200 is located between the high-frequency cavity 110 and the mid-frequency cavity 120, and the second partition 300 is located between the mid-frequency cavity 120 and the low-frequency cavity 130. Specifically, multiple partitions are used to separate the accommodating cavity into a high-frequency chamber 110, a mid-frequency chamber 120, and a low-frequency chamber 130 of gradually increasing volume. This can physically isolate sound waves of different frequency bands, avoid cross-interference, and make high frequencies clearer, mid-frequency fuller, and low frequencies cleaner. It can also reduce phase distortion that may be introduced by electronic frequency division, improving sound clarity and positioning. The high-frequency speaker 400 is installed in the high-frequency chamber 110 to reproduce high-frequency sounds; the full-range speaker 500 is installed in the mid-frequency chamber 120 to reproduce mid- and low-frequency sounds. The crossover unit 310 is set on the second partition 300 to scatter and absorb mid- and high-frequency sound waves while maintaining the propagation of low-frequency sound waves. The crossover unit 310 ensures that the low-frequency sound waves emitted by the full-range speaker 500 can be transmitted to the low-frequency chamber 130 through the crossover unit 310. The radiation unit 600 is disposed within the low-frequency chamber 130 and is used to receive low-frequency sound waves emitted by the full-range speaker 500 and transmitted to the low-frequency chamber 130 via the frequency divider 310. This enhances the low-frequency response and, in turn, enhances low-frequency performance within a limited space, providing a fuller low-frequency effect and a more profound feeling. This intelligent speaker is applicable to the technical fields of audio equipment and other fields.

[0022] It should be noted that the low-frequency sound waves mentioned in the embodiments of the present invention refer to sound waves of 20 to 250 Hz, medium-frequency sound waves refer to sound waves of 250 to 2000 Hz, and high-frequency sound waves refer to sound waves of 2000 to 20,000 Hz (or higher). In this embodiment, since the wavelength of high-frequency sound waves is relatively short, for example, the wavelength of a 20 kHz sound wave in the air is approximately 17 mm, therefore, designing a high-frequency chamber 110 with a smaller volume can form an effective acoustic environment and reduce the dispersion and unnecessary reflection of high-frequency energy. Since the wavelength of medium-frequency sound waves is medium, for example, the wavelength of a 1 kHz sound wave in the air is approximately 340 mm, therefore, designing a high-frequency chamber 110 with a medium volume can allow the medium-frequency sound waves to form an appropriate sound field distribution while avoiding excessive standing waves. Since low-frequency sound waves have a long wavelength, for example, the wavelength of a 100 Hz sound wave in the air is approximately 3400 mm, designing a larger low-frequency chamber 130 can support the complete formation and propagation of low-frequency sound waves. At the same time, it also helps to reduce the resonant frequency and expand the low-frequency response range.

[0023] See also Figure 1 In one embodiment of the present invention, the volume A of the high-frequency chamber 110, the volume B of the mid-frequency chamber 120, and the volume C of the low-frequency chamber 130 satisfy the following relationship: A:B:C = 1:(2-4):(5-7). By designing the volume ratio of the high-frequency chamber 110, the mid-frequency chamber 120, and the low-frequency chamber 130 to be 1:(2-4):(5-7), that is, the volume ratio of the high-frequency chamber 110, the mid-frequency chamber 120, and the low-frequency chamber 130 is approximately 1:3:6, the acoustic performance of each frequency band can be optimized. In one specific embodiment, the volume ratio of the high-frequency chamber 110, the mid-frequency chamber 120, and the low-frequency chamber 130 is 1:3:6. The high-frequency chamber 110, with a volume ratio of 1, prevents energy dispersion of high-frequency sound waves and ensures clarity. The mid-frequency chamber 120, with a volume ratio of 3, provides a uniform sound field for mid-frequency sound waves and reduces standing wave interference. The low-frequency chamber 130, with a volume ratio of 6, supports the complete propagation of low-frequency sound waves and reduces resonant frequency. This ratio also matches wavelength and spatial scale, effectively suppressing resonance superposition and achieving efficient and balanced acoustic response across the entire frequency band. In one specific embodiment, the housing 100 is cylindrical. In another specific embodiment, the volume ratio of the high-frequency chamber 110, the intermediate-frequency chamber 120, and the low-frequency chamber 130 is 1:2:7 or 1:4:5; among them, the volume ratio of the high-frequency chamber 110, the intermediate-frequency chamber 120, and the low-frequency chamber 130 is 1:2:7, which focuses more on enhancing the low-frequency performance, while the volume ratio of the high-frequency chamber 110, the intermediate-frequency chamber 120, and the low-frequency chamber 130 is 1:4:5, which focuses more on enhancing the intermediate-frequency performance.

[0024] The frequency division unit 310 is used to control the propagation paths of sound waves of different frequency bands, thereby achieving selective conduction of low-frequency sound waves. Figure 2 and Figure 3 In one embodiment of the present invention, the frequency division unit 310 is a hollow cylinder. The frequency division unit 310 is provided with a frequency division channel 311. The inner wall of the frequency division channel 311 is provided with multiple annular grooves 312 spaced along the axis of the frequency division unit 310, and each opening of the frequency division channel 311 is provided with a chamfer 313. In this embodiment, the annular grooves 312 provided in the frequency division channel 311 can scatter and absorb high-frequency sound waves to attenuate high-frequency energy, while also maintaining the propagation of low-frequency sound waves and achieving selective conduction of low-frequency sound waves. By designing chamfers 313 at the openings at both ends of the frequency division channel 311, the turbulence of the sound waves at the opening of the frequency division channel 311 can be reduced. In a specific embodiment, there are multiple frequency division units 310, and the multiple frequency division units 310 are evenly distributed at the center position of the second partition 300, and the inner hole diameter of each frequency division unit 310 is 25 mm and the length is 20 mm; the spacing between any two adjacent annular grooves 312 is 5 mm, and the depth of each annular groove 312 is 2 mm, mainly allowing low-frequency sound waves below 500 Hz to pass through.

[0025] See also Figure 2 In one embodiment of the present invention, the annular groove 312 has a conical cross-section and is arranged to taper from the inside to the outside along the radial direction of the crossover unit 310. The annular groove 312 can scatter and absorb high-frequency sound waves, thereby attenuating high-frequency energy, while also maintaining the propagation of low-frequency sound waves, thereby achieving selective conduction of low-frequency sound waves. In a specific embodiment, there are three annular grooves 312, which are spaced apart along the axial direction of the crossover unit 310.

[0026] See also Figure 3 In another embodiment of the present invention, the annular groove 312 has a rectangular cross-section and extends radially from the inside to the outside of the crossover unit 310. The annular groove 312 scatters and absorbs high-frequency sound waves, attenuating high-frequency energy while maintaining the propagation of low-frequency sound waves, thereby achieving selective conduction of low-frequency sound waves. In a specific embodiment, there are three annular grooves 312, spaced apart along the axial direction of the crossover unit 310.

[0027] See also Figure 1In one embodiment of the present invention, the radiation unit 600 is installed at the center of the bottom of the low-frequency chamber 130 through the mounting cylinder 131. Specifically, the bottom of the low-frequency chamber 130 is provided with a mounting cylinder 131, and the inner wall of the mounting cylinder 131 is provided with a mounting groove 132, and the outer edge of the radiation unit 600 is clamped in the mounting groove 132. In this embodiment, the radiation unit 600 itself does not contain active sound-emitting elements (such as voice coils, magnet systems, etc.), nor does it need to be directly connected to the power amplifier circuit. The function of the radiation unit 600 is to radiate sound energy outward, mainly through acoustic coupling with the active speaker unit, passively responding to changes in air pressure inside the smart speaker, thereby radiating sound waves, especially enhancing low-frequency response. The outer edge of the radiation unit 600 is clamped in the mounting groove 132 to mount the radiation unit 600 to the bottom of the low-frequency chamber 130. It has the characteristics of simple structure and can reduce the manufacturing difficulty of the smart speaker. In a specific embodiment, the inner diameter of the mounting cylinder 131 is 80 mm, the thickness is 5 mm, and the width is 10 mm, and the mounting cylinder 131 is made of high-density polyethylene.

[0028] See also Figure 1 In one embodiment of the present invention, an acoustic coupling is formed between the radiation unit 600 and the full-range speaker 500 through the low-frequency chamber 130, thereby enhancing the sound pressure output in the frequency range of 60-80 Hz. The radiation unit 600 includes an elastic member 610 and a support member 620, wherein the support member 620 is arranged around the elastic member 610, and the support member 620 is clamped in the mounting groove 132. In this embodiment, the center of the radiation unit 600 is designed as an elastic member 610 with elasticity, and the outer edge is designed as a hard support member 620, so as to form a double-layer suspension structure, which can provide appropriate mechanical damping and sufficient displacement space so that the radiation unit 600 can generate sufficient amplitude in the low-frequency band. Specifically, the harmonic frequency of the radiation unit 600 is controlled at about 45 Hz, and forms a Helmholtz resonator structure with the low-frequency chamber 130. In one specific embodiment, the radiating element 600 may be a diaphragm made of carbon fiber composite material, which maintains its shape during high-amplitude operation. The elastic member 610 may be a flexible rubber surround, and the support member 620 may be a butyl rubber retaining ring, enabling the radiating element 600 to operate efficiently in the low-frequency band. Furthermore, the center of the radiating element 600 protrudes from the low-frequency chamber 130 toward the mid-frequency chamber 120, with a height of 5 mm. The elastic member 610 at the center is 0.5 mm thick and 5 mm wide, while the support member 620 at the outer edge is 1 mm thick and 3 mm wide.

[0029] In this embodiment, the resonant frequency of the radiation unit 600 is set at 45Hz, which is precisely matched with the volume of the low-frequency chamber 130 and the size of the crossover unit 310, and can create a tuned Helmholtz resonator system. When the low-frequency sound waves generated by the full-range speaker 500 enter the low-frequency chamber 130 through the crossover unit 310, the radiation unit 600 is stimulated to resonate near its resonant frequency. This resonance can produce a sound pressure gain of 3-5dB in the range of 60-80Hz, while extending the lower limit of the low-frequency response to 65Hz; this extension effect is due to the fact that the resonant frequency of the radiation unit 600 is lower than the natural cutoff frequency of the system, and the low-frequency response of the smart speaker is improved through resonance. The main sound outlet 111 of the low-frequency chamber 130 is a circular opening for installing the cylinder 131. In addition, in order to assist the radiation of low-frequency sound waves and enhance the spatial sense of the low-frequency sound field, four low-frequency sound outlet structures are also opened at the bottom of the smart speaker. The four low-frequency sound outlet structures are evenly distributed around the bottom of the speaker and are about 10 mm away from the bottom surface of the smart speaker. Among them, the low-frequency sound outlet structure can be a circular frame made of high-density polyethylene material.

[0030] In one embodiment of the present invention, the inner wall of the low-frequency chamber 130 is made of high-density polyethylene material, which has good rigidity and appropriate internal damping, and can reduce the resonance of the cabinet. In this embodiment, part of the inner wall of the low-frequency chamber 130 is provided with a sound-absorbing layer for absorbing and reflecting medium and high-frequency sound waves. Specifically, the inner wall of the low-frequency chamber 130 is covered with a sound-absorbing layer made of polyester fiber, and the sound-absorbing layer is mainly distributed on the side walls and top walls of the low-frequency chamber 130. The sound-absorbing layer can absorb the energy of medium and high-frequency sound waves, and can also maintain the propagation of low-frequency sound waves, thereby realizing the selective conduction of low-frequency sound waves. By providing a sound-absorbing layer, low-frequency energy can be retained, and unnecessary reflections of medium and high-frequency sound waves can be suppressed, so that the fluctuation of the overall frequency response curve of the smart speaker in the range of 100Hz-18kHz is controlled within ±3dB.

[0031] See also Figure 1In one embodiment of the present invention, the portion of the housing 100 corresponding to the high-frequency chamber 110 and the top of the housing 100 are both made of a hard polycarbonate material. Polycarbonate has high hardness and excellent acoustic properties, which can reduce high-frequency energy loss. The inner wall of the high-frequency chamber 110 is highly smooth, which can reduce scattering loss of high-frequency sound waves. In this embodiment, a sound outlet 111 is provided at the top of the high-frequency chamber 110. The tweeter 400 is provided with a sound outlet surface, which is disposed toward the sound outlet 111. A sound wave guide 112 is disposed between the tweeter 400 and the sound outlet 111. The sound wave guide 112 is arranged to gradually expand from the end closest to the tweeter 400 to the end closest to the sound outlet 111. Specifically, by providing the sound wave guide 112, which gradually expands from the end closest to the tweeter 400 to the end closest to the sound outlet 111, the high-frequency sound waves can be uniformly radiated in all directions, thereby expanding the coverage of the sound field. In a specific embodiment, the opening angle of the sound wave guide block 112 is 45°, and the diameter of the sound wave guide block 112 gradually expands from 15 mm to 40 mm, and the length is 30 mm.

[0032] In one embodiment of the present invention, the inner wall of the waveguide 112 is patterned with continuous spiral stripes. These stripes disrupt the parallel reflection paths of sound waves, reducing the formation of standing waves and lowering high-frequency resonance. This design minimizes phase differences during high-frequency sound wave propagation, thereby expanding the sound field width to 90° and providing wider sound coverage. In one specific embodiment, the spiral stripes have a pitch of 1.5 mm, a texture depth of 0.2 mm, and a spiral angle of 15°.

[0033] See also Figure 1 and Figure 4In one embodiment of the present invention, the portion of the housing 100 corresponding to the intermediate frequency chamber 120 is made of a composite material of ABS plastic (thermoplastic, i.e., acrylonitrile-butadiene-styrene copolymer) and glass fiber. This provides appropriate acoustic damping and suppresses resonance in the intermediate frequency band. In this embodiment, an acoustic diffusion structure 121 is provided on the sidewall of the intermediate frequency chamber 120. The acoustic diffusion structure 121 includes a first cone block 1211, a second cone block 1212, and a third cone block 1313, which are spaced apart in sequence. The angles between the rotation axis of the first cone block 1211 and the sidewall of the intermediate frequency chamber 120, the angle between the rotation axis of the second cone block 1212 and the sidewall of the intermediate frequency chamber 120, and the angle between the rotation axis of the third cone block 1313 and the sidewall of the intermediate frequency chamber 120 are different. Acoustic diffusion structure 121 creates an irregular reflective surface, disrupting parallel reflections and reducing resonance peaks in the 1kHz-5kHz range. It also ensures a uniform distribution of intermediate frequency sound waves within intermediate frequency chamber 120, preventing standing waves and resonance at specific frequencies. For example, at a test frequency of 1kHz, harmonic distortion can be reduced to 0.3%.

[0034] In this embodiment, the acoustic diffusion structure 121 can be composed of a first cone 1211, a second cone 1212, and a third cone 1313, all oriented in different directions. Each cone has a base diameter of 3 mm and a density of 4 cones per square centimeter. The first cone 1211 has an inclination angle of 60°, the second cone 1212 has an inclination angle of 45°, and the third cone 1313 has an inclination angle of 30°. Furthermore, the acoustic diffusion structure 121 can also be a periodic concave-convex structure, an irregular polyhedron, a hemisphere, or the like. An irregular polyhedron refers to a structure composed of a random combination of multiple planes of irregular size and shape, while a hemisphere refers to an array of hemispherical protrusions or depressions.

[0035] In this embodiment, eight intermediate frequency sound-emitting structures are disposed on the top of the low frequency chamber 130. These structures are approximately 30 mm from the top surface of the housing 100 and are arranged in a circular pattern. In a specific embodiment, the intermediate frequency sound-emitting structures may be circular frames with an inner diameter of 15 mm and made of ABS material.

[0036] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A smart speaker, characterized in that: The invention comprises an outer shell, a first partition, a second partition, a high-frequency speaker, a full-range speaker and a radiation unit, wherein the outer shell is provided with a accommodating cavity; the first partition and the second partition are arranged in the accommodating cavity at intervals to divide the accommodating cavity into a high-frequency chamber, a mid-frequency chamber and a low-frequency chamber arranged in sequence, and the volume of the high-frequency chamber is smaller than the volume of the mid-frequency chamber, and the volume of the mid-frequency chamber is smaller than the volume of the low-frequency chamber, the high-frequency speaker is arranged in the high-frequency chamber, the full-range speaker is arranged in the mid-frequency chamber, the second partition is provided with a frequency division unit connecting the mid-frequency chamber and the low-frequency chamber, the frequency division unit is used to scatter and absorb mid- and high-frequency sound waves and maintain the propagation of low-frequency sound waves, and the radiation unit is arranged in the low-frequency chamber; the radiation unit is used to receive low-frequency sound waves emitted by the full-range speaker and propagated to the low-frequency chamber through the frequency division unit to enhance the low-frequency response.

2. The smart speaker according to claim 1, wherein: Definition: The volume of the high-frequency chamber is A, the volume of the medium-frequency chamber is B, and the volume of the low-frequency chamber is C; Then, A:B:C=1:(2-4):(5-7).

3. The smart speaker according to claim 1, wherein: The frequency dividing unit is a hollow cylinder and is provided with a frequency dividing channel. The inner wall of the frequency dividing channel is provided with a plurality of annular grooves at intervals along the axis of the frequency dividing unit, and each opening of the frequency dividing channel is provided with a chamfer.

4. The smart speaker according to claim 3, wherein: The annular groove is arranged to gradually decrease from inside to outside along the radial direction of the frequency division unit; or, The annular groove extends from inside to outside along the radial direction of the frequency division unit.

5. The smart speaker according to claim 1, wherein: A mounting cylinder is provided at the bottom of the low-frequency chamber, a mounting groove is provided on the inner wall of the mounting cylinder, and the outer edge of the radiation unit is clamped in the mounting groove.

6. The smart speaker according to claim 5, wherein: The radiation unit includes an elastic member and a support member. The support member is arranged around the elastic member, and the support member is clamped in the installation groove.

7. The smart speaker according to any one of claims 1 to 6, wherein: A sound outlet is provided at the top of the high-frequency chamber, and the high-frequency speaker is provided with a sound outlet surface, which is arranged toward the sound outlet, and a sound wave guide block is provided between the high-frequency speaker and the sound outlet, and the sound wave guide block is gradually expanded from an end close to the high-frequency speaker to an end close to the sound outlet.

8. The smart speaker according to claim 7, wherein: The inner wall of the sound wave guide block is provided with continuous spiral stripes.

9. The smart speaker according to any one of claims 1 to 6, wherein: The side wall of the intermediate frequency chamber is provided with an acoustic diffusion structure, and the acoustic diffusion structure includes a first cone block, a second cone block and a third cone block arranged in sequence. The angle between the rotation axis of the first cone block and the side wall of the intermediate frequency chamber, the angle between the rotation axis of the second cone block and the side wall of the intermediate frequency chamber, and the angle between the rotation axis of the third cone block and the side wall of the intermediate frequency chamber are different.

10. The smart speaker according to any one of claims 1 to 6, wherein: Part of the inner wall of the low-frequency chamber is provided with a sound-absorbing layer for absorbing and reflecting medium and high-frequency sound waves.

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