A smart speaker

Abstract

The present invention belongs to the technical field of speakers, and aims to provide a smart speaker, including a main shell, a microphone structure, two passive radiators and at least two speakers. Among them, the main shell is a columnar structure, the cross section is a shape that gradually decreases from the first side to the second side, and has a transverse cavity; the microphone structure is arranged in an array-type voice recognition structure through at least two microphone monomers arranged on the main shell; the two passive radiators are respectively adapted to be installed on the ends of the main shell to seal the cavity and their vibration plates are arranged in an "eight" shape; one end of the speaker is sealed and installed in the corresponding installation hole, and the other end is accommodated in the cavity, so that the main shell, the dual passive radiators and the multiple speakers together form a closed sound cavity. The smart speaker in the present invention has a simple and compact structure, has a super subwoofer sound effect in a limited sound cavity volume, can clearly pick up the audio signal of the sound source during voice interaction, and has a good user experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of speakers, and more specifically, relates to a smart speaker. Background Art

[0002] With the continuous development of artificial intelligence technology, smart speakers are gradually entering people's daily lives. In addition to the basic function of converting audio signals into electrical signals, amplifying them, and radiating the corresponding sounds for people to listen to, smart speakers can also realize on-demand songs, online shopping, weather forecasts, etc., or voice control of smart home devices, such as opening curtains, setting refrigerator temperature, and preheating water heaters. Obviously, the human-computer interaction function of smart speakers is becoming more and more powerful. However, in actual applications, smart speakers often have poor subwoofer sound effects and cannot clearly pick up the audio signal of the sound source during voice interaction, which ultimately leads to a poor user experience. Summary of the invention

[0003] The purpose of the present invention is to provide a smart speaker to solve technical problems such as poor subwoofer sound effect in the speaker and poor sound reception during voice interaction, which lead to poor user experience.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: to provide a smart speaker, the smart speaker comprising:

[0005] The main shell is a columnar structure with a cross section gradually decreasing from the first side to the second side, and has a transverse cavity. At least two mounting holes communicating with the cavity are opened on the cavity wall on the side close to the second side;

[0006] Passive radiators, two of which are provided, including a vibration plate; wherein the two passive radiators are respectively adapted to be installed on the ends of the main shell to seal the cavity, and the two vibration plates are arranged in an "eight" shape;

[0007] At least two speakers are provided, one end of which is sealed and installed in the corresponding installation hole, and the other end is accommodated in the cavity; and

[0008] A microphone structure, electrically connected to the speaker, comprising at least two microphone units, each of which is disposed on the main housing;

[0009] The lateral center distance between two adjacent microphone units is 80mm-120mm, and the distance between the sound pickup position of the microphone unit and the corresponding sound emission position of the speaker is greater than or equal to 80mm; the microphone unit is a sealed shock-absorbing cavity structure for eliminating the influence of the sound emission of the speaker on the sound pickup effect;

[0010] The main shell, the two passive radiators and the speaker together form a closed sound cavity.

[0011] The smart speaker provided by the present invention comprises a main shell, a microphone structure, two passive radiators and at least two speakers, wherein the main shell is a columnar structure and has a transverse cavity, the two passive radiators are respectively adapted to be installed on the ends of the main shell to seal the cavity, one end of the speaker is sealed and installed in the corresponding installation hole, and the other end is accommodated in the cavity, and the main shell, the dual passive radiators and the plurality of speakers together form a closed sound cavity; on the one hand, by setting the cross section of the main shell to a shape that gradually decreases from the first side to the second side, the vibration plates of the two passive radiators are arranged in an "eight" shape, so as to expand the volume of the sound cavity, thereby improving the subwoofer sound effect; on the other hand, through the combination of multiple speakers and dual passive radiators and a reasonable layout, the sound effect is greatly improved, and the output sensitivity of the smart speaker is increased; on the other hand, the microphone structure comprises at least two microphone monomers, that is, an array-type voice recognition structure is formed by a plurality of microphone monomers arranged on the main shell to remove noise to the maximum extent, including the sound emitted by the speaker, so as to improve the voice recognition ability and the wake-up rate, and finally improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0013] Figure 1 is a schematic diagram of the appearance structure of the smart speaker at one angle in an embodiment of the present invention;

[0014] Figure 2 is a schematic diagram of the appearance structure of the smart speaker in another angle according to an embodiment of the present invention;

[0015] Figure 3 is a three-dimensional exploded schematic diagram of a smart speaker in an embodiment of the present invention;

[0016] Figure 4 is a schematic diagram of the three-dimensional structure of the smart speaker without the outer shell in an embodiment of the present invention;

[0017] Figure 5 is a front view of the smart speaker in an embodiment of the present invention after removing the outer shell and the mesh cover;

[0018] Figure 6 is a top view of the smart speaker without the housing and the mesh cover in an embodiment of the present invention;

[0019] Figure 7 is a three-dimensional assembly diagram between the main shell and the intermediate connecting member in the smart speaker in an embodiment of the present invention;

[0020] Figure 8 Schematic diagram of the three-dimensional structure of the main shell of the smart speaker in an embodiment of the present invention;

[0021] Fig. 9 is a planar cross-sectional view of the smart speaker without the outer shell in an embodiment of the present invention;

[0022] Fig.10 yes Fig. 9 A partial enlarged view of the middle A;

[0023] Fig.11 is a three-dimensional exploded schematic diagram of a microphone unit of a smart speaker in an embodiment of the present invention;

[0024] Fig.12 is a schematic diagram of the three-dimensional structure of a passive radiator of a smart speaker in an embodiment of the present invention;

[0025] Fig.13 yes Fig.12 A three-dimensional cross-sectional view of a passive radiator;

[0026] Fig.14 yes Fig.13 A partial enlarged view of point B in the middle;

[0027] Fig.15 is a schematic diagram of the three-dimensional structure of a speaker of the smart speaker in an embodiment of the present invention;

[0028] Fig.16 is a plan cross-sectional view of a loudspeaker according to an embodiment of the present invention;

[0029] Fig.17 Schematic diagram of the positional relationship among the sound source, the microphone unit and the loudspeaker in an embodiment of the present invention.

[0030] Wherein, the reference numerals in the accompanying drawings are as follows:

[0031] 10-smart speaker, 20-sound source;

[0032] 100 - main housing, 110 - cavity, 120 - first side, 130 - second side, 140 - mounting hole, 150 - circuit board, 160 - battery;

[0033] 200-passive radiator, 210-vibration plate, 211-substrate, 2111-hanging edge, 2112-first folding ring, 2113-vibration basin, 2114-convex ring, 212-weight block, 213-support ring, 220-bracket, 221-supporting edge, 222-cavity, 223-groove, 230-sealing ring;

[0034] 300 - speaker, 310 - diaphragm, 311 - membrane part, 312 - second folding ring, 313 - edge pressing, 320 - base frame, 330 - anti-magnetic shielding cover;

[0035] 400-microphone unit, 410-bottom cover, 411-first groove, 412-connecting hole, 413-sealing groove, 420-upper cover, 421-second groove, 4211-first slot hole, 4212-second slot hole, 422-first sound hole, 423-waterproof groove, 430-acoustic signal conversion component, 431-receiving part, 432-vibrating part, 440-first gasket, 441-second sound hole, 450-first gasket, 460-second gasket, 461-third sound hole, 470-second gasket, 480-waterproof part;

[0036] 500-middle connecting piece, 510-connecting strip, 520-ear protector, 521-ear hole;

[0037] 600 - mesh cover, 610 - sound outlet hole group, 620 - sound inlet hole, 630 - first cover plate, 640 - second cover plate; 700 - housing, 710 - first button, 720 - second button, 730 - support. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific drawings and specific embodiments. Among them, the same or similar reference numerals in the drawings of the specific embodiments of the present invention represent the same or similar elements, or elements with the same or similar functions. It should be understood that the specific embodiments described below are intended to explain the present invention and are not intended to limit the present invention.

[0039] It should be noted that when an element is referred to as being "fixed on" or "mounted on" or "provided on" or "connected to" another element, it may be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it may be directly or indirectly connected to the other element. The orientation or position indicated by the terms "length", "width", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position shown in the accompanying drawings, which is only for the convenience of description and cannot be understood as a limitation on the present technical solution. In addition, the terms "first" and "second" are only for the convenience of description and cannot be understood as indicating relative importance or implicitly indicating the number of technical features. The meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In short, for those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0040] The following is a detailed description of an implementation of a smart speaker provided by the present invention in conjunction with the accompanying drawings.

[0041] like Figures 1 to 3 As shown, the smart speaker 10 includes a main housing 100, a passive radiator 200, a speaker 300 and a microphone structure. To simplify the structure of the smart speaker 10, the main housing 100 is a columnar structure. Figure 8 As shown, the cross section of the main shell 100 is in a shape that gradually decreases from the first side 120 to the second side 130. Preferably, the cross section of the main shell 100 is in a gourd shape, a bottle shape or a trapezoidal shape. Of course, in fact, it can also be other suitable shapes. Specifically in this embodiment, the cross section of the main shell 100 is in a gourd shape. More specifically, the cross section of the main shell 100 is circular on the side close to the first side 120. In this way, a larger cavity 110 can be provided as much as possible, which is convenient for achieving a strong subwoofer sound effect within the limited volume of the cavity 110, that is, it is conducive to the realization of the subwoofer sound effect of the miniature smart speaker. It should be noted that, usually, the direction from the first side 120 to the second side 1304 is perpendicular to the lateral direction, that is, the longitudinal direction. For example, in the normal use of the smart speaker 10, the first side 120 is the rear side and the second side 130 is the front side.

[0042] like Figure 8 As shown, in order to facilitate the installation and protection of electronic components such as the circuit board 150 of the smart speaker and to form a sound cavity, the main shell 100 has a horizontal cavity 110. That is, the smart speaker is a horizontal speaker, but it is not limited to this. In addition, in order to reasonably arrange the various components, the main shell 100 is provided with at least two mounting holes 140 connected to the cavity 110 on the cavity wall on the side close to the second side 130. It should be noted that the cavity 110 is an integrated setting. In order to simplify the structure of the smart speaker 10 and facilitate the realization of good subwoofer sound effects, the shape of the cavity 110 is similar to that of the main shell 100. For example, in this embodiment, the cavity 110 is also a gourd-shaped cavity 110. Of course, in fact, the shape of the cavity 110 is not limited to this, and it can be circular, square or polygonal, etc. In order to simplify the production process, the main shell 100 can be molded by integral injection molding or 3D printing.

[0043] like Figure 3 , Figure 5 and Figure 6 As shown, two passive radiators 200 are provided, wherein the two passive radiators 200 are respectively adapted to be installed on the ends of the main shell 100 to seal the cavity 110. The passive radiator 200 includes a vibration plate 210, and the two vibration plates 210 are arranged in an "eight" shape to expand the volume of the sound cavity, thereby expanding the vibration space of the passive radiator 200, which is conducive to improving the subwoofer sound effect.

[0044] like Figure 5 and Figure 6 As shown, at least two speakers 300 are provided. In this way, the use of multiple speakers 300 is conducive to greatly improving the sound effect, transmitting the sound to the human ear as quickly as possible, and increasing the output sensitivity of the smart speaker 10. Among them, one end of each speaker 300 is sealed and installed in the corresponding installation hole 140, and the other end is accommodated in the cavity 110. In this embodiment, two speakers 300 are provided, and the two speakers 300 are arranged in a row horizontally, and as shown in FIG. Figure 5 As shown, the lateral center distance L1 between the two speakers 300 is 60 mm-100 mm. The main housing 100, the two passive radiators 200 and the two speakers 300 together form a closed sound cavity. Figure 5 As shown, the lateral center distance L2 between the speaker 300 and the corresponding passive radiator 200 is 40mm-60mm. In this way, the smart speaker 10 can achieve a strong sub-bass sound effect within the limited volume of the cavity 110 through the combination of the dual speakers 300 and the dual passive radiators 200.

[0045] It should be noted that, in this embodiment, the loudspeaker 300 is a full-range loudspeaker 300, which is conducive to well displaying the full range of high, medium and low frequencies. Of course, in fact, it can also be a loudspeaker 300 of other suitable frequency bands.

[0046] like Figure 5 and Figure 6 As shown, the microphone structure includes at least two microphone units 400, wherein each microphone unit 400 is disposed on the main housing 100, and each microphone unit 400 in the microphone structure is electrically connected to the speaker 300. In this way, by arranging a plurality of microphone units 400 to form an array-type voice recognition structure, the audio signal emitted by the sound source 20 is received in different position areas. It can be understood that by filtering the sound waves through the phase difference of the sound waves received by each microphone unit 400, the sound in the environmental background can be removed to the maximum extent, including the sound emitted by the speaker 300, and finally the sound waves emitted by the sound source 20 are left, so the voice recognition capability is improved, and correspondingly, the wake-up rate is also improved.

[0047] For example Figure 6 As shown, in order to reduce the mutual interference between the microphone units 400 and further improve the voice recognition capability and wake-up rate of the microphone structure, the lateral center distance L3 between two adjacent microphone units 400 is 80mm-120mm. Fig.17 As shown, in order to reduce the influence of the sound emitted by the speaker 300 on the sound clarity of the microphone unit 400, the distance between the sound pickup position of the microphone unit 400 and the corresponding sound emission position of the speaker 300 is greater than or equal to 80 mm. Fig.17As shown, the distance L5 between the sound pickup position of the microphone unit 400 and the corresponding sound emission position of the speaker 300 is 80 mm to 120 mm. In this way, the microphone structure can more clearly pick up the audio signal emitted by the sound source 20, and the wake-up rate of the speaker is higher.

[0048] In addition, in order to eliminate the influence of the sound of the speaker 300 on the sound pickup effect, the microphone unit 400 is a sealed shock-absorbing cavity structure. It can be understood that when the smart speaker 10 is woken up in the far field, the sealed shock-absorbing cavity structure can eliminate the influence of the sound of the speaker 300, and reduce the influence of the vibration of the smart speaker 10 caused by excessive volume on the sound reception of the microphone unit 400. Specifically in the present embodiment, two microphone units 400 are provided, that is, the microphone structure is a dual-microphone voice recognition structure, and correspondingly, the smart speaker is a dual speaker 300, dual passive radiator 200 and dual microphone unit 400 structure. In addition, usually, the two microphone units 400 are on the same plane, and the plane has an angle relative to the ground.

[0049] like Figure 3 and Fig. 9 As shown, a circuit board 150 is usually disposed in the cavity 110 of the main shell 100. Among them, the circuit board 150 can be provided with a wireless communication module (not shown), a central processing module (not shown), a power supply device and a key module (not shown), etc. Specifically in this embodiment, the power supply device such as a battery 160, a wireless communication module, a key module, a microphone unit 400, and a speaker 300 are electrically connected to the central processing module respectively. Among them, the wireless communication module can be a Bluetooth module, an infrared sensor module or a Wi-Fi module. Figure 1 As shown, the housing 700 is provided with a first button 710, which may include a volume adjustment button, a function button, a recording button, etc. Figure 2 As shown, the housing 700 is also provided with a second button 720, which may include a power switch, a Bluetooth button, etc. The first button 710 and the second button 720 are electrically connected to the button module. The specific configuration may be determined according to actual needs.

[0050] Overall, the smart speaker has a simple and compact structure, has a strong subwoofer sound effect, can clearly pick up the audio signal emitted by the sound source, has a good voice interaction pickup effect, and provides a strong user experience.

[0051] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Figure 1 , Figure 3 and Figure 5 As shown, the smart speaker 10 also includes an intermediate connector 500. Figure 7 As shown, the intermediate connecting member 500 includes a connecting strip 510 and two ears 520. Figure 5 and Figure 7 As shown, the connecting strip 510 spans across the main shell 100, and the connecting strip 510 is disposed on the outer wall of the main shell 100 near the second side 130. Two ears 520 are respectively connected to both ends of the connecting strip 510, and the two ears 520 are arranged in an "eight" shape. Figures 5 to 7 As shown, the passive radiator 200 is adapted to be installed in the space enclosed by the corresponding end of the main shell 100 and the corresponding ear protector 520. Obviously, in this way, the internal space of the smart speaker is expanded, and the actual sound cavity can extend from the cavity 110 of the main shell 100 to the cavity 222 of the passive radiator 200, thereby increasing the sound vibration area of ​​the passive radiator 200 and improving the subwoofer sound effect, thereby giving people a strong sense of presence. Figure 3 and Figure 7 As shown, the ear protector 520 is provided with an ear hole 521 , and the counterweight 212 of the passive radiator 200 can extend from the ear hole 521 , so that the passive radiator 200 is protected while the sound of the passive radiator 200 is not affected.

[0052] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Figures 1 to 4 As shown, in order to protect the components in the smart speaker 10 and improve the overall sealing performance of the smart speaker 10, the smart speaker 10 also includes a mesh cover 600 and a shell 700. The mesh cover 600 is sleeved on the outer wall of the main shell 100. In order to simplify the structure of the smart speaker 10 and make the overall structure more compact, the mesh cover 600 is adapted to the main shell 100. It can be understood that Figure 3 As shown, the appearance structure of the mesh cover 600 is substantially the same as that of the main housing 100, that is, the cross-sectional shape of the mesh cover 600 also gradually decreases from the first side 120 to the second side 130. Figure 4 As shown, in order to better transmit the sound emitted by the speaker 300 to the environment, the grille 600 is provided with a sound outlet hole group 610 at the position corresponding to the speaker 300. Generally, the sound outlet hole group 610 is formed by a honeycomb through-hole layout. Figure 4 As shown, in order to facilitate the microphone unit 400 to pick up the audio signal of the sound source 20, the mesh cover 600 is provided with a sound inlet hole 620 at a position corresponding to the microphone unit 400.

[0053] It should be noted that if Figure 4As shown, the mesh cover 600 includes a first cover piece 630 and a second cover piece 640. Among them, the first cover piece 630 and the second cover piece 640 are pivotally connected on the side close to the first side 120. It can be understood that when installing, it is only necessary to clamp the main shell 100 with the first cover piece 630 and the second cover piece 640 at the same time. Correspondingly, when disassembling for maintenance, after removing the outer shell 700, it is only necessary to open the first cover piece 630 to basically see the main components on the main shell 100, so that it is convenient for installation and maintenance, which is conducive to improving production efficiency and improving the versatility and flexibility of the product.

[0054] like Figure 3 As shown, in order to protect the main shell 100 and the electronic components in the main shell 100, the shell 700 is sleeved on the outer wall of the mesh cover 600, that is, the shell 700, the mesh cover 600 and the main shell 100 are sleeved in sequence from the outside to the inside. In order to make the structure of the smart speaker 10 compact and beautiful in appearance, the shell 700 is adapted to the mesh cover 600 and the intermediate connector 500. It can be understood that the shape of the shell 700 is also the same as the main body shape of the main shell 100, that is, its cross-section is also in a shape that gradually decreases from the first side 120 to the second side 130, but the shell 700 is an open-loop structure, specifically, there is an opening on the side close to the second side 130, while the main shell 100 is a closed-loop structure. Obviously, due to the special shape and structure of the housing 700, when water hits the housing 700, the water can be quickly diverted away by the housing 700 and will not stay on the housing 700 for a long time. Therefore, it is helpful to reduce the probability of water penetrating into the speaker 300, the microphone unit 400 and the main housing 100, thereby improving the overall sealing performance of the smart speaker 10, reducing sound leakage and distortion, and enhancing the user's presence experience. In addition, if Figure 2 As shown, a support 730 is provided on the outer wall of the housing 700, so that the smart speaker 10 can be placed conveniently and stably.

[0055] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Figures 9 to 11 As shown, the microphone unit 400 includes a bottom cover 410, an upper cover 420, an acoustic signal conversion component 430 and a first gasket 440. The bottom cover 410, the upper cover 420, the acoustic signal conversion component 430 and the first gasket 440 form the above-mentioned sealed shock-absorbing cavity structure. Fig.10 and Fig.11 As shown, the top of the bottom cover 410 is provided with a first groove 411, and the side wall of the bottom cover 410 is provided with a connecting hole 412, which is connected to the first groove 411. The bottom of the upper cover 420 is provided with a second groove 421, and correspondingly, the top of the upper cover 420 is provided with a first sound hole 422, which is connected to the second groove 421. In addition, as shown Fig.10As shown, when the upper cover 420 is covered on the bottom cover 410, the second groove 421 and the first groove 411 together form a closed cavity. Fig.11 As shown, a sealing groove 413 is further provided at the top of the bottom cover 410 , so that when the upper cover 420 and the bottom cover 410 are covered, a sealing ring can be provided in the sealing groove 413 to achieve sealing between the upper cover 420 and the bottom cover 410 .

[0056] like Fig.10 As shown, one end of the acoustic signal conversion component 430 is disposed in the first groove 411 with a gap, and the other end is sealed in the second groove 421. In the axial direction of the first sound hole 422, the acoustic signal conversion component 430 can adaptively adjust the distance between it and the bottom cover 410 according to the vibration frequency of the sound wave received by the first sound hole 422. Fig.10 As shown, in order to facilitate the sound signal conversion component 430 to convert the audio signal into an electrical signal more smoothly, the end of the sound signal conversion component 430 close to the bottom cover 410 is gapped in the first groove 411 in both the depth direction and the width direction of the first groove 411.

[0057] like Fig.10 As shown, the first gasket 440 is arranged on one end of the sound signal conversion component 430 to prevent the first sound hole 422 and the second groove 421 from being connected, so as to seal the other end of the sound signal conversion component 430 in the second groove 421, and reduce the vibration of the whole machine caused by excessive sound when the smart speaker 10 plays sound, thereby reducing the influence of the vibration on the microphone structure, and further reducing the probability of howling in the microphone structure.

[0058] In addition, in order to more smoothly transmit the audio signal emitted by the sound source 20 to the sound signal conversion component 430, as shown in FIG. Fig.10 and Fig.11 As shown, the first gasket 440 is provided with a second sound hole 441, wherein the second sound hole 441 communicates with the first sound hole 422. Usually, in order to improve the waterproof performance and reduce the occurrence of the howling phenomenon, the second sound hole 441 and the first sound hole 422 are staggered, that is, they are not completely opposite to each other.

[0059] As can be understood from the above, the connecting hole 412, the first groove 411 and the second groove 421 form a connecting space, in which the sound signal conversion component 430 can adjust the internal capacitance by the distance between the sound signal conversion component 430 and the bottom cover 410, so as to convert the received audio signal of the sound source 20 into an electrical signal, and transmit it to the corresponding circuit for signal processing. Because the end of the sound signal conversion component 430 close to the first sound hole 422 is sealed in the second groove 421, the first sound hole 422 is not conductive with the second groove 421, that is, the first sound hole 422 and the connecting hole 412 of the bottom cover 410 are not conductive, so that the microphone unit 400 can form a sealed cavity structure, which is conducive to reducing the attenuation of high frequencies, improving the clarity of low voices, and preventing howling.

[0060] It should be noted that, in this embodiment, in order to improve the anti-interference capability of the microphone structure and effectively utilize the limited cavity structure, the microphone unit 400 adopts a high-sensitivity digital microphone to convert the analog audio signal into a digital signal for processing and transmission. Fig.17 As shown, the voice recognition distance L4 of each microphone unit 400 ranges from 2 m to 4 m.

[0061] In general, the microphone structure eliminates the influence of sounds outside the sound source 20 on the microphone's clear and accurate signal pickup by adopting a sealed cavity structure and a microphone array voice recognition structure, thereby facilitating minimal echo and maximum voice recognition and wake-up rate.

[0062] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Figures 9 to 11 As shown, the second groove 421 of the upper cover 420 includes a first slot 4211 and a second slot 4212. To facilitate the transmission of the sound waves of the sound source 20 to the sound signal conversion component 430, the second slot 4212 communicates with the first sound hole 422. Fig.10 As shown, the size of the second slot 4212 is smaller than that of the first slot 4211. In this way, the structure of the upper cover 420 is simplified, the entire microphone structure is more compact, and the acoustic signal conversion component 430 is more easily sealed in the second groove 421.

[0063] like Fig.10 and Fig.11As shown, the acoustic signal conversion component 430 includes a receiving part 431 and a vibrating part 432. The receiving part 431 is sealed and arranged in the second slot 4212. Specifically, a first gasket 440 is arranged at the end of the receiving part 431, that is, the first gasket 440 is located between the end of the receiving part 431 and the bottom of the second slot 4212, so as to prevent the first sound hole 422 and the second slot 4212 from being connected, thereby realizing the sealing setting of the receiving part 431. It can be understood that the receiving part 431 is mainly used to receive the audio signal emitted by the sound source 20. It should be noted that the first gasket 440 can be a silicone gasket, of course, it can also be other suitable gaskets.

[0064] like Fig.10 As shown, the vibration part 432 is accommodated in the first slot hole 4211 and the first groove 411. Specifically, the top end of the vibration part 432 abuts against the inner bottom wall of the first slot hole 4211, and the bottom end extends into the first groove 411, so that when receiving sound waves and vibrating, the vibration part 432 is concentrated in the cavity 110 formed by the first slot hole 4211 and the first groove 411 to displace and form a capacitance change, which is conducive to ensuring the relative position of the sound signal conversion component 430 in the sealed cavity, thereby ensuring the firm sealing of the receiving part 431.

[0065] It should be noted that if Fig.10 and Fig.11 As shown, the receiving portion 431 is convexly disposed on the vibrating portion 432. The cross-sectional shapes of the receiving portion 431 and the vibrating portion 432 may be a suitable structure such as a polygon, a quadrilateral, an axisymmetric hexagon, etc., which helps to ensure that the sound signal conversion component 430 does not rotate circumferentially as a whole when it vibrates and generates displacement, ensures that the receiving portion 431 can be firmly sealed, and helps to improve the structural stability of the entire microphone structure. Correspondingly, the hole shapes of the first slot 4211 and the second slot 4212 may also be a suitable structure such as a polygon, a quadrilateral, an axisymmetric hexagon, etc. Usually, in order to simplify the structure, the receiving portion 431 is adapted to the second slot 4212, and the vibrating portion 432 is adapted to the first slot 4211.

[0066] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Fig.10 and Fig.11As shown, the microphone unit 400 also includes a first gasket 450 and a second gasket 460. Among them, the first gasket 450 is arranged in the first groove 411, and the first gasket 450 supports the vibration part 432 of the sound signal conversion component 430. That is, the two ends of the first gasket 450 are respectively abutted against the vibration part 432 and the bottom of the first groove 411. In this way, when the smart speaker 10 makes a sound, the vibration of the whole machine can be reduced, and then the vibration of the sound signal conversion component 430 and the bottom cover 410 can be reduced, thereby further reducing the probability of howling of the microphone structure. For example Fig.10 and Fig.11 As shown, in order to reduce the vibration between the microphone unit 400 and the main housing 100 of the smart speaker 10, the microphone unit 400 generally further includes a second gasket 470. The second gasket 470 is disposed on the bottom end of the bottom cover 410.

[0067] It should be noted that, in order to ensure the stability of the structure, usually, the cross-sectional shape of the first gasket 450 is the same as the slot shape of the first groove 411, and the size of the first gasket 450 is slightly smaller than the slot size of the first groove 411. In addition, the first gasket 450 and the second gasket 470 can be formed of rubber-plastic products such as ethylene-vinyl acetate copolymer (abbreviated as EVA) and rubber-plastic foam materials made thereof, which have the advantages of buffering and shock resistance. Of course, in fact, the first gasket 450 and the second gasket 470 can also be made of other suitable materials.

[0068] It should also be noted that if Fig.10 and Fig.11 As shown, in order to make the first sound hole 422 waterproof and dustproof, a waterproof groove 423 is provided at the top of the upper cover 420. The first sound hole 422 is provided on the bottom of the waterproof groove 423. Correspondingly, the microphone unit 400 further includes a waterproof member 480, wherein the waterproof member 480 is disposed in the waterproof groove 423 to cover the first sound hole 422.

[0069] like Fig.10 As shown, the second gasket 460 is sleeved on the end of the upper cover 420. In this way, the upper cover 420 and the mesh cover 600 can be sealed at the position where the microphone structure is installed, and the vibration of the microphone structure can be reduced. Specifically, the two ends of the second gasket 460 are respectively pressed against the upper cover 420 and the mesh cover 600, so as to ensure the firm installation of the waterproof member 480 and further reduce the probability of howling of the microphone structure.

[0070] like Fig.11As shown, the second gasket 460 is provided with a third sound hole 461, wherein the third sound hole 461 is communicated with the first sound hole 422. It can be understood that in the smart speaker 10, the sound waves of the sound source 20 are sequentially transmitted to the sound signal conversion component 430 through the sound inlet hole 620 of the mesh cover 600, the third sound hole 461 of the microphone unit 400, the first sound hole 422 and the second sound hole 441.

[0071] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Fig.12 and Fig.13 As shown, the passive radiator 200 further includes a bracket 220. Fig.13 As shown, in order to facilitate the support and positioning of the vibration plate 210, the bracket 220 has a supporting edge 221. In addition, the bracket 220 is provided with a cavity 222 in the axial direction, and the cavity 222 is surrounded by the supporting edge 221. That is, the bracket 220 is a hollow bracket 220, which is conducive to ensuring that the vibration plate 210 vibrates and makes sound under the action of the internal and external air pressure difference of the speaker. Among them, the cavity 222 is connected with the cavity 110 of the main shell 100, thereby extending and expanding the space of the sound cavity from the cavity 110 of the main shell 100 to the cavity 222 of the passive radiator 200, which is conducive to achieving super bass sound effects.

[0072] It should be noted that, in order to make the passive radiator 200 and the main housing 100 compatible and installed, usually, the bracket 220 is adapted to the main housing 100. As shown in the figure, the bracket 220 is provided with a groove 223 on one side close to the main housing 100, so that the sealing performance of the passive radiator 200 and the main housing 100 can be ensured by arranging a sealing ring 230 in the groove 223.

[0073] like Fig.13 As shown, the vibration plate 210 includes a base plate 211, a counterweight block 212 and a support ring 213. The base plate 211 includes a hanging edge 2111, a first fold ring 2112 and a vibration basin 2113 arranged in sequence from the outside to the inside. Fig.14 As shown, the hanging edge 2111 is fixedly mounted on the outer end surface of the supporting edge 221, and the first fold ring 2112 and the vibration basin 2113 are suspended in the cavity 222, so that the entire substrate 211 can be supported by the bracket 220. In addition, the hanging edge 2111 is made of a soft material, which is beneficial to improve the waterproof performance of the passive radiator 200 and facilitate the adjustment of the resonant frequency of the passive radiator 200. Specifically in this embodiment, the hanging edge 2111 is made of a soft rubber material, preferably butyl rubber (also known as IIR rubber). In actual applications, the hanging edge 2111 can also be made of other suitable soft materials.

[0074] It should be noted that, in the present embodiment, the vibration basin 2113 is a planar structure, and of course, it can also be a basin-shaped structure or other suitable structures. The first fold ring 2112 is arranged at the outer periphery of the vibration basin 2113 and is "U"-shaped. Of course, the first fold ring 2112 can also be a suitable structure such as a circular, elliptical or rounded rectangular shape, which can be determined according to actual needs. The hanging edge 2111 is arranged at the outer periphery of the first fold ring 2112. In practical applications, the specific structure of the vibration plate 210 is not limited to this.

[0075] like Fig.13 As shown, in order to facilitate the adjustment of the vibration frequency of the vibration basin 2113, the counterweight 212 is arranged on the vibration basin 2113. Specifically in the present embodiment, the counterweight 212 is arranged on the outer wall of the vibration basin 2113. In fact, the counterweight 212 can also be arranged on the inner wall of the vibration basin 2113 or other suitable positions of the vibration basin 2113. It should be noted that the material of the counterweight 212 can be the same as the material of the vibration basin 2113, or it can be different. Specifically in the present embodiment, the counterweight 212 is made of iron. In order to ensure the vibration uniformity and stability of the vibration basin 2113, the cross-sectional shape of the counterweight 212 is usually the same as the cross-sectional shape of the vibration basin 2113. Specifically in the present embodiment, the counterweight 212 is a round block. In addition, the size of the counterweight 212 is the same as the size of the cross section of the vibration basin 2113. It can be understood that the counterweight 212 is adapted to the vibration basin 2113.

[0076] In this embodiment, the support ring 213 is made of metal material and, as the name implies, is ring-shaped. Specifically, the support ring 213 is an iron ring. Fig.13 and Fig.14 As shown, the support ring 213 is coated in the hanging edge 2111, that is, the hard material is coated in the soft material. In this way, the rigidity of the hanging edge 2111 can be enhanced, thereby improving the rigidity of the supporting system of the vibration plate 210. Therefore, while ensuring the waterproof performance of the passive radiator 200, the anti-seismic performance of the passive radiator 200 is improved. Secondly, the entire vibration plate 210 will maintain linear displacement during the vibration process and will not produce lateral cutting vibration, which is conducive to achieving subwoofer sound effects.

[0077] In this embodiment, in order to simplify the structure of the vibration plate 210 and improve the structural stability of the vibration plate 210, the substrate 211, the counterweight 212 and the support ring 213 are integrally formed by a mold. Specifically, the support ring 213 is integrally formed in the hanging edge 2111 of the substrate 211, and the counterweight 212 is integrally formed on the outer wall of the vibration basin 2113 of the substrate 211. Of course, in actual applications, the substrate 211, the counterweight 212 and the support ring 213 are not limited to this structure. For example, the substrate 211, the counterweight 212 and the support ring 213 can be provided separately.

[0078] In this embodiment, in order to facilitate the firm connection of the vibration plate 210 to the bracket 220, a circular hole (not shown) is provided on the supporting edge 221 of the bracket 220. Fig.13 and Fig.14 As shown, a convex ring 2114 is formed on the inner wall of the hanging edge 2111 of the vibration plate 210, wherein the convex ring 2114 is tightly fitted and inserted into the annular hole.

[0079] Further, as a specific implementation of the smart speaker 10 provided by the present invention, Fig.15 and Fig.16 As shown, the speaker 300 includes a diaphragm 310. Specifically in this embodiment, the diaphragm 310 has a waterproof performance and can achieve a level 7 waterproof performance, which is conducive to ensuring that the speaker can be used normally in water. It should be noted that in this embodiment, the speaker 300 can be a common speaker 300 structure or a specially made structure. For example, Fig.15 As shown, the speaker 300 may further include a base frame 320 supporting the diaphragm 310 and an anti-magnetic shielding cover 330 provided on the base frame 320 for shielding. Of course, to achieve the conversion of audio signals, the speaker 300 may further include a voice coil (not shown), a magnetic circuit system (not shown), etc. In addition, to improve the sealing performance of the speaker 300, the speaker 300 may further include a sealing ring 230 (not shown), which is provided at the position of the mounting hole 140. It can be understood that the mounting hole 140 and the speaker 300 can be sealed by the sealing ring 230.

[0080] like Fig.16 As shown, the diaphragm 310 includes a diaphragm portion 311, a second fold ring 312 and a pressure edge 313 which are sequentially connected from the inside to the outside. Specifically in this embodiment, the diaphragm portion 311 is concave, the second fold ring 312 is arranged at the outer periphery of the diaphragm portion 311 and is in an inverted "U" shape, and the pressure edge 313 is arranged at the outer periphery of the second fold ring 312. Usually, the diaphragm portion 311, the second fold ring 312 and the pressure edge 313 are integrally formed. Of course, in practical applications, the specific structure of the diaphragm 310 is not limited thereto.

[0081] In order to improve the waterproof performance of the diaphragm 310, the edge 313 is made of butyl rubber material with waterproof performance. Of course, in fact, the edge 313 can also be made of other suitable materials. In addition, the membrane portion 311 and the second fold ring 312 of the diaphragm 310 are made of aluminum-magnesium alloy material, wherein the percentage of magnesium in the aluminum-magnesium alloy material is more than 40%. Specifically in this embodiment, the percentage of magnesium in the aluminum-magnesium alloy material can reach 96%. In this way, while improving the waterproof level of the diaphragm 310, due to the good rigidity and high-frequency ductility of the diaphragm 310, it is not only beneficial to increase the overall rigidity of the diaphragm 310, but also to adjust the internal damping characteristics of the diaphragm 310 and the compliance of the vibration of the diaphragm 310, and more effectively reduce the sound signal distortion caused by the split vibration of the diaphragm 310 during high-frequency vibration, so that the high-frequency curve becomes smoother and the ultra-high frequency bandwidth is extended. Therefore, the sense of presence will be stronger in the sound effect, the high frequency will be clear and transparent, and the reproduction of the instrument will be stronger. Obviously, it is conducive to the realization of a full-range micro speaker with moderate damping, wide dynamic range and rich tone.

[0082] It is obvious from the above that the smart speaker 10 has dual speakers 300 arranged side by side in parallel in a horizontal cavity structure, dual passive radiators 200 are arranged on both sides of the smart speaker 10, and dual microphone units 400 are arranged on the main shell 100 with a sealed shock-absorbing cavity structure, that is, embedded in the smart speaker 10. Finally, the smart speaker 10 achieves a strong subwoofer sound effect in a limited sound cavity volume through the integrated arrangement of dual speakers 300 and dual passive radiators 200. The sealed shock-absorbing frame structure of the array of dual microphone units 400 greatly reduces the echo and improves the voice recognition capability. The overall structure is simple and compact, and the user has a strong sense of presence.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A smart speaker, characterized in that: The smart speaker comprises: The main shell is a columnar structure with a cross section gradually decreasing from the first side to the second side, and has a transverse cavity. At least two mounting holes communicating with the cavity are opened on the cavity wall on the side close to the second side; Passive radiators, two of which are provided, including a vibration plate; wherein the two passive radiators are respectively adapted to be installed on the ends of the main shell to seal the cavity, and the two vibration plates are arranged in an "eight" shape; At least two speakers are provided, one end of which is sealed and installed in the corresponding installation hole, and the other end is accommodated in the cavity; and A microphone structure, electrically connected to the speaker, comprising at least two microphone units, each of which is disposed on the main housing; The lateral center distance between two adjacent microphone units is 80 mm-120 mm, and the distance between the sound pickup position of the microphone unit and the corresponding sound emission position of the speaker is greater than or equal to 80 mm; the microphone unit is a sealed shock-absorbing cavity structure for eliminating the influence of the sound emission of the speaker on the sound pickup effect; The main shell, the two passive radiators and the speaker together form a closed sound cavity; The microphone unit comprises: The bottom cover has a first groove on the top and a connecting hole in communication with the first groove on the side wall; The upper cover has a second groove at the bottom end and a first sound hole in communication with the second groove at the top end, and is covered on the bottom cover, wherein the second groove and the first groove together form a closed cavity; an acoustic signal conversion component, one end of which is gap-disposed in the first groove, and the other end of which is sealed-disposed in the second groove; and A first gasket is disposed on one end of the acoustic signal conversion component and is provided with a second sound hole communicating with the first sound hole, so as to prevent the first sound hole from being connected to the second groove; Among them, in the axial direction of the first sound hole, the sound signal conversion component can adaptively adjust the distance between it and the bottom cover according to the vibration frequency of the sound wave received by the first sound hole; the bottom cover, the upper cover, the sound signal conversion component and the first gasket form the sealed shock-absorbing cavity structure.

2. The smart speaker according to claim 1, characterized in that: The smart speaker also includes an intermediate connector, which includes: A connecting strip, spanning the main shell, and disposed on an outer side wall of the main shell close to the second side; Two ear protectors are respectively connected to the two ends of the connecting strip and arranged in an "eight" shape; The passive radiator is adapted to be installed in a space enclosed by a corresponding end of the main shell and the corresponding ear protector.

3. The smart speaker according to claim 2, characterized in that: The smart speaker also includes: A mesh cover is sleeved on the outer wall of the main shell and is adapted to the main shell. A sound outlet group is opened at a position corresponding to the speaker, and a sound inlet is opened at a position corresponding to the microphone unit; and, The outer shell has the same shape as the main body of the main shell, is sleeved on the outer side wall of the mesh cover, and is adapted to the mesh cover and the intermediate connecting piece.

4. The smart speaker according to claim 1, characterized in that: There are two speakers, and the lateral center distance between the two speakers is 60 mm-100 mm.

5. The smart speaker according to claim 1, characterized in that: The lateral center distance between the loudspeaker and the corresponding passive radiator is 40 mm-60 mm.

6. The smart speaker according to claim 5, characterized in that: The second groove comprises: a first slot; and a second slot hole, communicating with the first sound hole and having a size smaller than that of the first slot hole; The acoustic signal conversion component comprises: a receiving portion, which is sealed and disposed in the second slot, and the first gasket is disposed at an end thereof to prevent the first sound hole from being connected to the second slot; and The vibration part is accommodated in the first slot hole and the first groove.

7. The smart speaker according to claim 6, characterized in that: The microphone unit also includes: A first gasket, disposed in the first groove, supporting the vibration part; The second gasket is sleeved on the end of the upper cover and is provided with a third sound hole communicated with the first sound hole.

8. The smart speaker according to any one of claims 1 to 4, characterized in that: The passive radiator also includes: The bracket has a supporting edge, and a cavity surrounded by the supporting edge and communicating with the cavity is opened in the axial direction; The vibration plate includes a base plate, a counterweight block and a support ring; The substrate comprises a hanging edge, a first folding ring and a vibration basin which are arranged in sequence from the outside to the inside; wherein the hanging edge is made of a soft material and is fixedly mounted on the outer end surface of the supporting edge, and the first folding ring and the vibration basin are suspended in the cavity; The counterweight block is arranged on the vibration basin; the support ring is covered in the hanging edge and is made of metal material.

9. The smart speaker according to any one of claims 1 to 4, characterized in that: The speaker includes a diaphragm, which includes a membrane portion, a second folding ring and a pressing edge connected in sequence from the inside to the outside, the pressing edge is made of a butyl rubber material with waterproof properties, the membrane portion and the second folding ring are made of an aluminum-magnesium alloy material, and the percentage of magnesium in the aluminum-magnesium alloy material is more than 40%.

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