Loudspeaker and electronic equipment

Abstract

The embodiments of the present application relate to the field of loudspeaker structures, and in particular to a loudspeaker and electronic device. The loudspeaker uses a dynamic speaker as the first sound unit, and the second sound unit is arranged in the middle of one side of the magnetic circuit structure of the first sound unit. The first sound unit and the second sound unit respectively output sounds of different frequencies. The loudspeaker can meet the needs of high and low frequencies at the same time, and improve the high-frequency extension and low-frequency dive performance. The axial dimension of the loudspeaker in the embodiment of the present application is relatively small, and the overall thickness is close to the thickness of a single dynamic unit. The second sound unit is coaxially arranged with the first sound unit, and the high-pitched vibration sound source surface of the second sound unit is coplanar with the bass vibration sound source surface of the first sound unit, which can reduce the phase difference between sounds of different frequencies and make the spatial position of the instrument more accurate. The voice coil and the annular diaphragm are elastically supported on the basin frame by an elastic suspension, which is conducive to the vibration of the voice coil and the annular diaphragm within a predetermined range, reduces the swing polarization, and improves reliability.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of speaker structures, and in particular to a speaker and an electronic device. Background Art

[0002] Sound quality is a fundamental requirement for speakers (such as headphones and speakers). Users' expectations for speaker sound quality are increasing, demanding wider high-frequency extension and better low-frequency depth. Traditional speakers use a single speaker unit, making it difficult to achieve optimal design for both high and low frequencies. If there's bass, there's no treble, and vice versa, the output sound quality is poor. To address this, the industry has developed speaker solutions that combine tweeters and woofers. Figure 1 、 Figure 2 、 Figure 3 The three speakers utilize a dual-unit combination. All three utilize a dynamic speaker as the woofer (10), and a dynamic speaker, a piezoelectric ceramic sound plate, or a dynamic iron speaker as the tweeter (20). The two units in each speaker are stacked axially, occupying significant axial space. The overall structure is approximately 1.5 to 2.5 times thicker than a single dynamic unit. Existing speakers that utilize a tweeter and woofer combination have a large axial dimension, making it difficult to accommodate the tight internal space requirements. Furthermore, the tweeter and woofer emit sounds of different frequencies, resulting in phase differences and sound separation. Summary of the Invention

[0003] The embodiments of the present application provide a loudspeaker and an electronic device, which solve the problem that the existing loudspeaker using a combination of a tweeter and a woofer has a large axial size and the tweeter and the woofer emit sounds of different frequencies respectively, resulting in phase difference and sound separation.

[0004] To achieve the above objectives, the present invention adopts the following technical solutions:

[0005] In a first aspect, embodiments of the present application provide a loudspeaker comprising a frame, a first sound unit, a second sound unit, and an elastic suspension. The first sound unit comprises a magnetic circuit structure, a voice coil, and an annular diaphragm. The magnetic circuit structure is mounted on the frame and has an annular air gap. The annular diaphragm is spaced apart from the magnetic circuit structure, and the voice coil is connected to the annular diaphragm. At least a portion of the voice coil is accommodated within the annular air gap. The connection between the voice coil and the annular diaphragm forms a bass vibration source surface. When an audio current flows through the voice coil within a first magnetic field provided by the magnetic circuit structure, the voice coil generates a second magnetic field that varies with the audio current. The second sound unit is coaxially arranged with the first sound unit and mounted in the middle of the side of the magnetic circuit structure facing the annular diaphragm. The second sound unit has a higher sound frequency than the first sound unit and a treble vibration source surface, which is coplanar with the bass vibration source surface. The elastic suspension elastically supports the voice coil and the annular diaphragm on the frame.

[0006] The speaker provided in the embodiment of the present application uses a dynamic speaker as the first sound unit, and the second sound unit is arranged in the middle of one side of the magnetic circuit structure of the first sound unit. Because the first sound unit and the second sound unit can respectively output sounds of different frequencies, the speaker can simultaneously meet the needs of high and low frequencies, improving high-frequency extension and low-frequency diving performance. Compared with traditional speakers that use axially stacked tweeters and woofers, the second sound unit in the speaker of the embodiment of the present application is located in the middle of one side of the magnetic circuit structure, making the axial size of the speaker smaller and the overall thickness close to that of a single dynamic unit, thereby improving space utilization. The second sound unit is arranged coaxially with the first sound unit, and the treble vibration sound source surface of the second sound unit is arranged coplanar with the woofer vibration sound source surface of the first sound unit. This can reduce the phase difference caused by the different units outputting sounds of different frequencies and the resulting sound separation, and provide a more accurate sense of the spatial position of the instrument. The voice coil and the annular diaphragm are elastically supported on the basin frame by an elastic suspension, which facilitates the vibration of the voice coil and the annular diaphragm within a predetermined range, reduces the swing polarization, and improves reliability.

[0007] In conjunction with the first aspect, in a first possible implementation of the first aspect, the elastic suspension includes a coaxially arranged inner ring portion, a middle ring portion, and an outer ring portion, a first cantilever connected between the inner and middle ring portions, and a second cantilever connected between the middle and outer ring portions. The inner ring portion is positioned adjacent to the second sound unit, the voice coil is connected to the middle ring portion, and the outer ring portion is connected to the basin frame. When the voice coil vibrates up and down within the annular air gap, the middle ring portion and the connection between the annular diaphragm and the middle ring portion vibrate accordingly. The first and second cantilevers act to pull the voice coil and annular diaphragm within a predetermined range, effectively reducing swing polarization and even voice coil breakage, thereby improving the reliability of the first sound unit.

[0008] In combination with the first possible implementation of the first aspect, in the second possible implementation of the first aspect, the elastic suspension is configured as a flexible circuit board for providing audio current to the voice coil and the second pronunciation unit. The outer ring portion has an input terminal, the voice coil is electrically connected to the middle ring portion, and the second pronunciation unit is electrically connected to the inner ring portion. During assembly, the voice coil and the second pronunciation unit are respectively arranged in the middle ring portion and the inner ring portion, the ends of the voice coil are connected to the positive and negative terminals of the middle ring portion, the second pronunciation unit is connected to the positive and negative terminals of the inner ring portion, and the input terminal of the outer ring portion is connected to the external circuit to complete the line connection to realize signal transmission. There is no need to manually wire the voice coil and the second pronunciation unit, which reduces the process difficulty, improves assembly efficiency and reliability, and facilitates the realization of an automated process.

[0009] In combination with the first or second possible implementation of the first aspect, in a third possible implementation of the first aspect, both the first cantilever and the second cantilever are arranged in a serpentine manner. This improves the fatigue resistance of the cantilever and allows the cantilever of the elastic suspension to be relatively long within a limited space, thereby meeting space constraints.

[0010] In conjunction with any one of the first to third possible implementations of the first aspect, in a fourth possible implementation of the first aspect, there are multiple first cantilevers, and the multiple first cantilevers are symmetrically arranged around the axis of the central ring portion. There are multiple second cantilevers, and the multiple second cantilevers are symmetrically arranged around the axis of the central ring portion. Each first cantilever has a similar bending configuration, and each second cantilever has a similar bending configuration. This centrally symmetrical arrangement of the cantilevers ensures symmetrical radial vibration of the voice coil, effectively reducing sway and improving sound quality.

[0011] In conjunction with any one of the first to fourth possible implementations of the first aspect, in a fifth possible implementation of the first aspect, a ratio of the diameter difference between the outer ring portion and the middle ring portion to the diameter difference between the middle ring portion and the inner ring portion is in a range of 0.6 to 1.4. In this way, the voice coil is positioned approximately midway between the inner and outer edges of the annular diaphragm, thereby increasing the sound output area of ​​the first sound unit and improving the sound output effect of the first sound unit.

[0012] In combination with any one of the first aspect through the fifth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, the magnetic circuit structure includes a magnetic base, a magnet, and a magnetic plate. The magnetic base includes a plate-shaped portion and a cylindrical portion connected to the outer edge of the plate-shaped portion. The magnet is mounted on the plate-shaped portion, and the magnetic plate is mounted on the magnet. The outer circumference of the magnet and the outer circumference of the magnetic plate are both spaced from the inner wall of the cylindrical portion, forming an annular air gap. The annular air gap forms an opening near one end of the magnetic plate for the voice coil to extend into. The cylindrical portion is mounted on the basin frame. The magnetic circuit structure can generate magnetic lines of force passing through the annular air gap, referred to as a first magnetic field. The voice coil at least partially extends through the opening of the annular air gap. When audio current passes through the voice coil, a second magnetic field is generated. The second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, causing the voice coil to vibrate, thereby driving the annular diaphragm to vibrate.

[0013] In combination with any one of the first to fifth possible implementations of the first aspect, in a seventh possible implementation of the first aspect, the magnetic circuit structure includes a magnetic base, an annular magnet, and a magnetic ring. The magnetic base includes a plate-shaped portion and a columnar portion connected to the center of the plate-shaped portion. The annular magnet is mounted on the plate-shaped portion, and the magnetic ring is mounted on the annular magnet. The inner circumference of the annular magnet and the inner circumference of the magnetic ring are both spaced apart from the outer circumference of the columnar portion, forming an annular air gap. The annular air gap forms an opening near one end of the magnetic ring for the voice coil to extend into. The magnetic base is mounted on the basin frame. The magnetic circuit structure generates magnetic lines of force passing through the annular air gap, referred to as a first magnetic field. The voice coil at least partially extends through the opening of the annular air gap. When audio current passes through the voice coil, a second magnetic field is generated. The second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, causing the voice coil to vibrate, thereby driving the annular diaphragm to vibrate.

[0014] In conjunction with any one of the first to fifth possible implementations of the first aspect, in an eighth possible implementation of the first aspect, the magnetic circuit structure includes a magnetic base, an inner ring magnet, an outer ring magnet, an inner ring magnetic plate, and an outer ring magnetic plate. The inner ring magnet and the outer ring magnet are coaxially mounted on the magnetic base with spacing therebetween. The inner ring magnetic plate and the outer ring magnetic plate are mounted on the inner ring magnet and the outer ring magnet in a one-to-one correspondence. The inner ring magnetic plate and the outer ring magnetic plate are spaced apart. An annular air gap is formed between the assembly of the inner ring magnet and the inner ring magnetic plate and the assembly of the outer ring magnet and the outer ring magnetic plate. The annular air gap forms an opening near one end of the inner ring magnetic plate for the voice coil to extend into. The magnetic base is mounted on a basin frame. The magnetic circuit structure generates magnetic lines of force passing through the annular air gap, referred to as a first magnetic field. The voice coil at least partially extends through the opening of the annular air gap. When audio current passes through the voice coil, a second magnetic field is generated. The second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, causing the voice coil to vibrate, thereby driving the annular diaphragm to vibrate.

[0015] In conjunction with any one of the first aspect through the eighth possible implementation of the first aspect, in a ninth possible implementation of the first aspect, a bracket is provided in the middle portion of a side of the magnetic circuit structure facing the annular diaphragm, and the second sound unit is mounted on the bracket. This elevates the second sound unit relative to the magnetic circuit structure by a certain distance, such that the connection between the annular diaphragm and the voice coil remains coplanar with the second sound unit.

[0016] In conjunction with the ninth possible implementation of the first aspect, in a tenth possible implementation of the first aspect, the magnetic circuit structure has an axial through hole in its middle portion, the bracket has a mounting slot for mounting the second sound unit, and the mounting slot is connected to the axial through hole. The inner side of the second sound unit is connected to the outside world through the axial through hole of the magnetic circuit structure, thereby reducing the negative pressure inside the second sound unit and bringing the air pressure on both sides of the second sound unit closer, thereby improving the output sound quality of the second sound unit.

[0017] In conjunction with the tenth possible implementation of the first aspect, in an eleventh possible implementation of the first aspect, the sidewall of the bracket has a vent, and the annular air gap and the axial through hole are connected via the vent. In this way, the inner side of the annular diaphragm is connected to the outside world through the vent of the bracket and the axial through hole of the magnetic circuit structure, reducing the negative pressure inside the annular diaphragm and making the air pressure on both sides of the annular diaphragm closer, which is beneficial to improving the output sound quality of the first sound unit.

[0018] In combination with any one of the ninth to eleventh possible implementations of the first aspect, in the twelfth possible implementation of the first aspect, the bracket has a first positioning groove, and the basin frame has a second positioning groove; a first support ring is provided at the first positioning groove, and a second support ring is provided at the second positioning groove; the inner edge of the annular diaphragm is connected to the first support ring, and the outer edge of the annular diaphragm is connected to the second support ring. This makes it easier for the bass vibration sound source surface at the connection between the voice coil and the annular diaphragm to be as coplanar as possible with the treble vibration sound source surface of the second pronunciation unit. This can effectively utilize the axial space, make the structure compact, and make the inner and outer edges of the annular diaphragm higher than the connection between the voice coil and the annular diaphragm, which is conducive to forming a larger space for the annular diaphragm to vibrate, thereby improving the output sound effect of the first pronunciation unit.

[0019] In combination with any one of the first aspect to the twelfth possible implementation manner of the first aspect, in the thirteenth possible implementation manner of the first aspect, the annular diaphragm includes a first annular portion and a second annular portion that are coaxially arranged, the outer edge of the first annular portion is connected to the inner edge of the second annular portion, and the radial cross-section of the first annular portion and the radial cross-section of the second annular portion are arched. The voice coil is connected to the connection between the first annular portion and the second annular portion. The inner concave surface of the first annular portion and the inner concave surface of the second annular portion are both arranged toward the magnetic circuit structure, which is beneficial to improving the stiffness of the annular diaphragm and the reliability of the up and down vibration of the annular diaphragm. It is understandable that the radial cross-section of the first annular portion or the second annular portion can also be set to be arched separately, which can also improve the stiffness of the annular diaphragm.

[0020] In conjunction with any one of the first aspect through the thirteenth possible implementation of the first aspect, in the fourteenth possible implementation of the first aspect, the second sound unit is a micro-electromechanical speaker, a piezoelectric ceramic sounding plate, an electrostatic speaker, or a flat-panel speaker. These second sound units are compact and occupy little space, making them easy to fit into the middle of one side of the magnetic circuit structure of the first sound unit, thereby integrating the second sound unit with the first sound unit, improving sound quality, and reducing the space occupied by the speaker.

[0021] In conjunction with any one of the first aspect to the fourteenth possible implementation of the first aspect, in a fifteenth possible implementation of the first aspect, a ratio of an outer diameter of the basket frame to a distance from a bottom surface of the magnetic circuit structure to a bass vibration source surface ranges from 1 to 9. In this speaker, the second sound unit is coaxially arranged with the first sound unit, and the treble vibration source surface and the bass vibration source surface are coplanarly arranged, fully utilizing axial space, simultaneously meeting the requirements of both treble and bass, and improving high-frequency response.

[0022] In combination with any one of the first aspect to the fifteenth possible implementation of the first aspect, in a sixteenth possible implementation of the first aspect, the basin frame has a through hole, and the magnetic circuit structure is at least partially assembled within the through hole; a retaining arm is provided on the inner wall of the through hole, and the magnetic circuit structure has a limiting groove, and the retaining arm and the limiting groove engage with each other to define the position of the magnetic circuit structure relative to the basin frame. After the magnetic circuit structure is assembled, the magnetic circuit structure is inserted into the through hole from the bottom end of the basin frame. When the retaining arm of the basin frame is installed in the limiting groove of the magnetic circuit structure, the retaining arm blocks the magnetic circuit structure, thereby achieving axial and circumferential positioning of the magnetic circuit structure.

[0023] In combination with any one of the first aspect to the sixteenth possible implementation of the first aspect, in the seventeenth possible implementation of the first aspect, the basket has a first air hole connected to the annular air gap, and a first porous damping layer for covering the first air hole; the magnetic circuit structure has a second air hole connected to the annular air gap, and a second porous damping layer for covering the second air hole. These solutions can adjust the airflow rate of the air hole to control the bass resonant frequency. It will be understood that both solutions, where the basket has the first air hole and covers the first porous damping layer, or where the magnetic circuit structure has the second air hole and covers the second porous damping layer, can also control the bass resonant frequency.

[0024] In a second aspect, an embodiment of the present application provides an electronic device comprising the above-mentioned speaker.

[0025] The speaker in the electronic device of the present invention has a smaller axial dimension, improving space utilization. This reduces phase differences between the first and second sound units outputting sounds of different frequencies, providing a more precise sense of the instrument's spatial position. The use of an elastic suspension to elastically support the voice coil and annular diaphragm on the basin frame facilitates vibration of the voice coil and annular diaphragm within a predetermined range, reduces swing polarization, and improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 、 Figure 2 、 Figure 3 Provide structural schematic diagrams of three types of speakers in the prior art respectively;

[0027] Figure 4 A three-dimensional exploded view of a loudspeaker provided in an embodiment of the present application;

[0028] Figure 5 A three-dimensional cross-sectional view of a loudspeaker provided in an embodiment of the present application;

[0029] Figure 6 A cross-sectional view of a loudspeaker provided in an embodiment of the present application;

[0030] Figure 7 A schematic diagram of the structure of the loudspeaker provided in an embodiment of the present application after the annular diaphragm is removed;

[0031] Figure 8 (a), (b), and (c) are respectively the front view, top view, and bottom view of the speaker provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] See Figures 4 to 6An embodiment of the present application provides a loudspeaker comprising a frame 100, a first sound unit 200, a second sound unit 300 and an elastic suspension 400. The first sound unit 200 comprises a magnetic circuit structure 210, a voice coil 220 and an annular diaphragm 230. The magnetic circuit structure 210 is mounted on the frame 100, and the magnetic circuit structure 210 has an annular air gap 211. The annular diaphragm 230 is spaced apart from the magnetic circuit structure 210, and the voice coil 220 is connected to the annular diaphragm 230. At least a portion of the voice coil 220 is accommodated in the annular air gap 211, and a bass vibration sound source surface 200a is formed at the connection between the voice coil 220 and the annular diaphragm 230. When an audio current passes through the voice coil 220 in the first magnetic field provided by the magnetic circuit structure 210, the voice coil 220 is used to generate a second magnetic field that changes with the audio current. The second sound unit 300 is coaxially arranged with the first sound unit 200. The second sound unit 300 is mounted in the middle of the side of the magnetic circuit structure 210 facing the annular diaphragm 230. The sound frequency of the second sound unit 300 is greater than that of the first sound unit 200. The second sound unit 300 has a high-frequency vibration source surface 300a, which is coplanar with the low-frequency vibration source surface 200a. The elastic suspension 400 is used to elastically support the voice coil 220 and the annular diaphragm 230 on the basin frame 100.

[0033] The loudspeaker provided in the embodiment of the present application uses a dynamic speaker as the first sound unit 200, and the second sound unit 300 is arranged in the middle of one side of the magnetic circuit structure 210 of the first sound unit 200. Since the first sound unit 200 and the second sound unit 300 can output sounds of different frequencies respectively, the loudspeaker can meet the needs of high and low frequencies at the same time, and improve the high-frequency extension and low-frequency dive performance. Compared with the traditional loudspeaker that uses a tweeter and a woofer axially stacked, the second sound unit 300 in the loudspeaker of the embodiment of the present application is located in the middle of one side of the magnetic circuit structure 210, so that the axial size of the loudspeaker is smaller and the overall thickness is close to the thickness of a single dynamic unit, thereby improving space utilization. The second sound unit 300 is coaxially arranged with the first sound unit 200, and the high-pitched vibration sound source surface 300a of the second sound unit 300 is coplanar with the bass vibration sound source surface 20a of the first sound unit 200, which can reduce the phase difference caused by the different units outputting sounds of different frequencies and the resulting sound separation, and the spatial position sense of the musical instrument is more accurate. The elastic suspension 400 is used to elastically support the voice coil 220 and the annular diaphragm 230 on the basin frame 100, which is beneficial for the voice coil 220 and the annular diaphragm 230 to vibrate within a predetermined range, reduce the swing polarization, and improve reliability.

[0034] The second sound unit 300 is coaxial with the first sound unit 200, allowing for some deviation between the axis lines of the two units. The high-frequency vibration source surface 300a and the low-frequency vibration source surface 20a are coplanar, allowing for some deviation between the two vibration source surfaces. The closer the high-frequency vibration source surface 300a and the low-frequency vibration source surface 200a are to coplanarity, the smaller the phase difference between the sounds of different frequencies output by the first and second sound units 200 and 300, thereby minimizing the potential for separation of sounds of different frequencies.

[0035] The first pronunciation unit 200 and the second pronunciation unit 300 can each output sounds of different frequencies. For example, the voice coil 220 in the first pronunciation unit 200 can vibrate at a first frequency, producing low-frequency sounds. The second pronunciation unit 300 can vibrate at a second frequency, producing mid-frequency and high-frequency sounds. For example, the first frequency is 50 Hz to 5000 Hz. For example, the second frequency is 300 Hz to 20,000 Hz. The specific pronunciation frequencies are not limited.

[0036] In the first sound unit 200, the magnetic circuit structure 210 is used to provide a first magnetic field. When an audio current flows through the voice coil 220 within the first magnetic field provided by the magnetic circuit structure 210, the voice coil 220 generates a second magnetic field that varies with the audio current. This second magnetic field interacts with the first magnetic field provided by the magnetic circuit structure 210, causing the voice coil 220 to vibrate in response to the audio current within the first magnetic field of the magnetic circuit structure 210. Since the voice coil 220 is connected to the annular diaphragm 230, the voice coil 220 drives the annular diaphragm 230 to vibrate, thereby producing sound with the same waveform as the original audio current.

[0037] When setting up the elastic suspension, refer to Figure 7 , the elastic suspension 400 includes a coaxially arranged inner ring portion 410, a middle ring portion 420 and an outer ring portion 430, a first cantilever 440 connected between the inner ring portion 410 and the middle ring portion 420, and a second cantilever 450 connected between the middle ring portion 420 and the outer ring portion 430, and the first cantilever 440 and the second cantilever 450 are suspended. Among them, the annular structures such as the inner ring portion 410, the middle ring portion 420 and the outer ring portion 430 can be circular, elliptical, polygonal, rounded rectangular, etc. Exemplarily, these annular structures are all set to be circular, the diameter of the outer ring portion 430 is larger than the diameter of the middle ring portion 420, and the diameter of the middle ring portion 420 is larger than the diameter of the inner ring portion 410. The diameter here refers to the average of the inner diameter and the outer diameter of the annular structure. Combined Figure 5The diameter of the voice coil 220 is close to that of the middle ring portion 420, and the voice coil 220 is connected to the middle ring portion 420. The inner ring portion 410 is located near the second sound unit 300, and the outer ring portion 430 is connected to the basin frame 100. When the voice coil 220 vibrates up and down in the annular air gap 211, the middle ring portion 420 and the connection between the annular diaphragm 230 and the middle ring portion 420 vibrate accordingly. The first cantilever 440 and the second cantilever 450 pull the voice coil 220 and the annular diaphragm 230 on both sides of the middle ring portion 420, guiding the vibration of the voice coil 220 and the annular diaphragm 230 within a predetermined range. This effectively reduces the possibility of swing polarization or even voice coil 220 breakage, thereby improving the reliability of the first sound unit 200.

[0038] For example, the elastic suspension 400 can be integrally formed to facilitate mass production. Alternatively, the elastic suspension 400 can be divided into multiple components, which are then welded together. For example, the inner ring portion 410, the middle ring portion 420, the outer ring portion 430, the first cantilever 440, and the second cantilever 450 are all independent components, which are then connected to form the entire elastic suspension 400. This method is suitable for producing elastic suspensions 400 with larger radial dimensions.

[0039] For example, the annular diaphragm 230 and the voice coil 220 can be respectively connected to the two sides of the middle ring portion 420 so that the voice coil 220 is connected to the annular diaphragm 230. For example, the voice coil 220 is welded to one side of the middle ring portion 420, and the annular diaphragm 230 is bonded to the other side of the middle ring portion 420, forming a dual-compliance system that effectively controls the swing, and the voice coil 220 and the annular diaphragm 230 are elastically supported on the basin frame 100 through the elastic suspension 400.

[0040] In some embodiments, in order to improve the assembly efficiency of the voice coil and the second sound unit, refer to Figure 5 、 Figure 7 The elastic suspension 400 is configured as a flexible printed circuit board, which is used to provide audio current to the voice coil 220 and the second sound unit 300. The outer ring portion 430 has an input terminal 431, electrically connecting the voice coil 220 to the middle ring portion 420, and the second sound unit 300 to the inner ring portion 410. The flexible printed circuit board is equipped with power conductors (not shown) and multiple sets of positive and negative terminals 411 and 421. During assembly, the voice coil 220 and the second pronunciation unit 300 are respectively arranged in the middle ring part 420 and the inner ring part 410, and the corresponding positive and negative terminals are welded. The ends of the voice coil 220 are connected to the positive and negative terminals 421 of the middle ring part 420, the second pronunciation unit 300 is connected to the positive and negative terminals 411 of the inner ring part 410, and the input terminal 431 of the outer ring part 430 is connected to the external circuit. The line connection is completed to realize signal transmission. There is no need to manually lead the voice coil 220 and the second pronunciation unit 300, which reduces the process difficulty, improves assembly efficiency and reliability, and facilitates the realization of automated process.

[0041] For example, see Figure 4 The second sound unit 300 can be equipped with an auxiliary flexible circuit board 301, which is welded to the inner ring portion 410 of the elastic suspension 400. This facilitates the manufacture of the elastic suspension 400. The auxiliary flexible circuit board 301 is bendable, which facilitates the assembly of the second sound unit 300 and the elastic suspension 400. The second sound unit 300 is adjusted to a predetermined position so that the bass vibration sound source surface 200a and the treble vibration sound source surface 300a are as coplanar as possible. Alternatively, the second sound unit 300 can be directly integrated into the inner ring portion 410 of the elastic suspension 400.

[0042] For example, see Figure 7 The outer ring portion 430 of the elastic suspension 400 can be provided with two sets of input terminals 431, which serve as signal input terminals for the second sound unit 300 and the voice coil 220, respectively, to achieve separate transmission of different audio signals. It is understandable that the outer ring portion 430 can be provided with one or more sets of input terminals 431 to achieve signal transmission.

[0043] In addition, the flexible circuit board can be electrically connected to the system in a package (SIP) chip to achieve the driving of the first sound unit 200 and the second sound unit 300. Figure 8 A terminal block 460 may be provided on the side of the basin frame 100 facing away from the annular diaphragm 230 or on the outer wall of the magnetic base. The terminal block 460 is electrically connected to the flexible circuit board. The terminal block has terminal blocks for connecting the speaker to an external circuit.

[0044] In some embodiments, in order to improve the fatigue resistance of the cantilever, the cantilever of the elastic suspension is set to be relatively long within a limited space. Figure 7 The first cantilever 440 and the second cantilever 450 are both arranged in a serpentine manner. Taking the first cantilever 440 as an example, the first cantilever 440 includes a first radially extending arm 441, a circumferentially extending arm 442, and a second radially extending arm 443, which are sequentially connected. The first radially extending arm 441 and the second radially extending arm 443 are respectively arranged in different radial directions. This allows the first cantilever 440 to be arranged longer and meet the requirements of space constraints. The second cantilever 450 is similar and will not be described in detail here.

[0045] In some embodiments, in order to make the vibration of the voice coil on both sides of the radial direction symmetrical, effectively reduce the swing, and improve the sound quality, the cantilever can be arranged symmetrically in the center. Figure 7, there are multiple first cantilevers 440, and the multiple first cantilevers 440 are symmetrically arranged around the axis of the middle ring portion 420. There are multiple second cantilevers 450, and the multiple second cantilevers 450 are symmetrically arranged around the axis of the middle ring portion 420. In other words, the bending manner of each first cantilever 440 is the same, and the bending manner of each second cantilever 450 is the same. For example, three first cantilevers 440 are symmetrically arranged between the inner ring portion 410 and the middle ring portion 420, and four second cantilevers 450 are symmetrically arranged between the middle ring portion 420 and the outer ring portion 430. The specific number of cantilevers is not limited.

[0046] As an example, the elastic suspension, voice coil, annular diaphragm, and magnetic circuit structure all adopt a centrally symmetrical structure, making the three factors of mass, compliance, and magnetic field strength completely centrally symmetrical, which helps improve the output sound quality of the first sound unit. Compliance refers to the softness of the vibrating element in axial movement.

[0047] In some embodiments, in order to increase the sound output area of ​​the first pronunciation unit to obtain better sound quality, refer to Figure 7 The ratio of the diameter difference between the outer ring portion 430 and the middle ring portion 420, and the diameter difference between the middle ring portion 420 and the inner ring portion 410, ranges from 0.6 to 1.4. The diameter here refers to the average of the inner and outer diameters of the annular structure. This arrangement of the voice coil 220 roughly midway between the inner and outer edges of the annular diaphragm 230 increases the sound output area of ​​the first sound unit 200, thereby enhancing the sound output of the first sound unit 200.

[0048] There are several optional implementation methods for setting the magnetic circuit structure of the first sound unit. The first magnetic circuit structure is an internal magnetic structure, that is, a magnet is set inside the voice coil. Figure 4 、 Figure 6 The magnetic circuit structure 210 includes a magnetic base 212, a magnet 213 and a magnetic plate 214. The magnetic base 212 includes a plate-shaped portion 2121 and a cylindrical portion 2122 connected to the outer edge of the plate-shaped portion 2121. The magnet 213 is mounted on the plate-shaped portion 2121, and the magnetic plate 214 is mounted on the magnet 213. The outer peripheral surface of the magnet 213 and the outer peripheral surface of the magnetic plate 214 are spaced from the inner wall of the cylindrical portion 2122 and form an annular air gap 211. The annular air gap 211 forms an opening for the voice coil 220 to extend into at one end close to the magnetic plate 214. The cylindrical portion 2122 is mounted on the basin frame 100. The magnet 213 is axially magnetized, and the magnetic circuit structure 210 can generate magnetic lines of force passing through the annular air gap 211, which is called the first magnetic field.

[0049] For example, magnetic lines of force may be emitted from the bottom end of magnet 213, pass through the plate-shaped portion 2121 of magnetic base 212, follow the cylindrical portion 2122, reach the top end of cylindrical portion 2122, pass through annular air gap 211, and then return to the top end of magnet 213. Voice coil 220 at least partially extends through the opening of annular air gap 211. When audio current passes through voice coil 220, a second magnetic field is generated. This second magnetic field of voice coil 220 interacts with the first magnetic field of magnetic circuit structure 210, causing voice coil 220 to vibrate, thereby driving the annular diaphragm 230 to vibrate.

[0050] The second type of magnetic circuit structure is an external magnetic structure, in which a magnet is placed outside the voice coil. The magnetic circuit structure includes a magnetic base, an annular magnet, and a magnetic ring. The magnetic base includes a plate-like portion and a columnar portion connected to the middle of the plate-like portion. The annular magnet is mounted on the plate-like portion, and the magnetic ring is mounted on the annular magnet. The inner circumference of the annular magnet and the inner circumference of the magnetic ring are both spaced from the outer circumference of the columnar portion, forming an annular air gap. The annular air gap forms an opening near one end of the magnetic ring for the voice coil to extend into. The magnetic base is mounted on the basin frame. The annular magnet is axially magnetized, and the magnetic circuit structure can generate magnetic lines of force passing through the annular air gap, which is called the first magnetic field.

[0051] For example, the magnetic lines of force may originate from the bottom end of the magnet, pass through the plate-shaped portion of the magnetic base, follow the columnar portion, reach its top end, pass through the annular air gap, and then return to the top end of the magnet. The voice coil at least partially extends through the opening of the annular air gap. When audio current passes through the voice coil, a second magnetic field is generated. This second magnetic field of the voice coil interacts with the first magnetic field of the magnetic circuit structure, causing the voice coil to vibrate, thereby driving the annular diaphragm to vibrate.

[0052] The third type of magnetic circuit structure is the inner-outer magnetic structure, in which magnets are placed on both the inner and outer sides of the voice coil. The magnetic circuit structure comprises a magnetic base, an inner magnet, an outer magnet, an inner magnetic plate, and an outer magnetic plate. The inner and outer magnets are coaxially mounted on the base, spaced apart. The inner and outer magnetic plates are mounted on the inner and outer magnets, one for each. The inner and outer magnetic plates are spaced apart, forming an annular air gap between the inner and outer magnets and the outer and inner magnetic plates. This annular air gap forms an opening near one end of the inner magnetic plate for the voice coil to extend into. The magnetic base is mounted on the base frame. The inner and outer magnets are axially magnetized. This magnetic circuit structure generates magnetic lines of force passing through the annular air gap, known as the first magnetic field.

[0053] For example, the magnetic lines of force may originate from the bottom of the inner magnet, pass sequentially through the magnetic base, the outer magnet, the outer magnetic plate, the annular air gap, enter the inner magnet, and then return to the top of the inner magnet. The voice coil at least partially extends through the opening of the annular air gap. When audio current passes through the voice coil, a second magnetic field is generated. This second magnetic field interacts with the first magnetic field of the magnetic circuit structure, causing the voice coil to vibrate, which in turn drives the annular diaphragm to vibrate.

[0054] When installing the second sound unit, in order to make the high-pitched vibration sound source surface and the low-pitched vibration sound source surface coplanar, refer to Figure 4 A bracket 500 is provided in the middle of the side of the magnetic circuit structure 210 facing the annular diaphragm 230, and the second sound unit 300 is mounted on the bracket 500. This elevates the second sound unit 300 relative to the magnetic circuit structure 210 by a certain distance, ensuring that the connection between the annular diaphragm 230 and the voice coil 220 is coplanar with the second sound unit 300. The outer diameter of the bracket 500 is smaller than that of the frame 100, sufficient to support the second sound unit 300.

[0055] For example, when the first magnetic circuit structure 210 is used, a magnetic conductive plate 214 is positioned above the magnetic circuit structure 210. The upper surface of the magnetic conductive plate 214 is provided with an assembly slot 2141 to facilitate positioning and assembly of the bracket 500, thereby improving assembly efficiency. It is understood that when other magnetic circuit structures are used, assembly slots may also be provided to facilitate positioning and assembly of the bracket.

[0056] When installing the elastic suspension 400, the inner ring portion 410 of the elastic suspension 400 can be connected to the bracket 500, and the outer ring portion 430 is connected to the basin frame 100. This facilitates the assembly of the elastic suspension 400 and allows the elastic suspension 400 to be made larger within a limited space. Accordingly, the first cantilever 440 and the second cantilever 450 can be made longer to meet the elastic support requirements of the elastic suspension 400 for the voice coil 220 and the annular diaphragm 230.

[0057] In some embodiments, in order to make the air pressure on both sides of the second pronunciation unit close to obtain better sound quality, refer to Figure 5 The magnetic circuit structure 210 has an axial through-hole 215 in the middle, and the bracket 500 has a mounting slot 501 for mounting the second sound unit 300. The mounting slot 501 is connected to the axial through-hole 215. In this way, the second sound unit 300 can be stably assembled in the mounting slot 501. The inner side of the second sound unit 300 is connected to the outside world through the axial through-hole 215 of the magnetic circuit structure 210, reducing the negative pressure inside the second sound unit 300 and making the air pressure on both sides of the second sound unit 300 close, which is conducive to improving the output sound quality of the second sound unit 300. The second sound unit 300 can be assembled to the bracket 500 by bonding, snapping, tight fit, or other methods.

[0058] For example, when the first magnetic circuit structure 210 is employed, via holes are provided in the middle of the plate-shaped portion 2121 of the magnetic base 212, the middle of the magnet 213, and the middle of the magnetic plate 214, respectively, to form the axial through hole 215 of the magnetic circuit structure 210. When other magnetic circuit structures are employed, axial through holes can also be formed by providing via holes in the corresponding structures, thereby cooperating with the mounting slot of the bracket to connect the inner side of the second sound unit with the outside world.

[0059] In some embodiments, in order to make the air pressure on both sides of the annular diaphragm of the first sound unit close to obtain better sound quality, refer to Figure 4 、 Figure 5 The sidewall of the bracket 500 has a vent 502, and the annular air gap 211 and the axial through hole 215 are connected through the vent 502. In this way, the inner side of the annular diaphragm 230 is connected to the outside world through the vent 502 of the bracket 500 and the axial through hole 215 of the magnetic circuit structure 210, reducing the negative pressure inside the annular diaphragm 230 and making the air pressure on both sides of the annular diaphragm 230 close, which is beneficial to improving the output sound effect of the first sound unit 200. For example, the bracket 500 is generally cylindrical, and the sidewall of the bracket 500 can be provided with multiple vents 502 along the circumferential direction to facilitate the flow of gas between the annular air gap 211 and the axial through hole 215.

[0060] When assembling the ring diaphragm to the bracket and basin, refer to Figure 6 The bracket 500 has a first positioning slot 503, and the frame 100 has a second positioning slot 101. A first support ring 601 is provided at the first positioning slot 503, and a second support ring 602 is provided at the second positioning slot 101. The inner edge of the annular diaphragm 230 is connected to the first support ring 601, and the outer edge of the annular diaphragm 230 is connected to the second support ring 602. This facilitates assembly of the annular diaphragm 230 to the bracket 500 and frame 100, ensuring that the bass vibration sound source surface 200a at the connection between the voice coil 220 and the annular diaphragm 230 is as coplanar as possible with the treble vibration sound source surface 300a of the second sound unit 300. The first support ring 601 and the second support ring 602 are respectively disposed in the first positioning groove 503 and the second positioning groove 101. This effectively utilizes axial space, resulting in a compact structure. Furthermore, the inner and outer edges of the annular diaphragm 230 are positioned higher than the connection between the voice coil 220 and the annular diaphragm 230, creating a larger vibration space for the annular diaphragm 230 and improving the sound output of the first sound unit 200. The shapes of the first support ring 601 and the second support ring 602 are determined based on the shape of the annular diaphragm 230.

[0061] In some embodiments, in order to improve the rigidity of the ring diaphragm, a double-arch diaphragm may be used. Figure 5The annular diaphragm 230 includes a first annular portion 231 and a second annular portion 232 that are coaxially arranged. The outer edge of the first annular portion 231 is connected to the inner edge of the second annular portion 232, and the radial cross-sections of the first annular portion 231 and the second annular portion 232 are arched. The voice coil 220 is connected to the connection between the first annular portion 231 and the second annular portion 232. The inner concave surfaces of the first annular portion 231 and the second annular portion 232 are both arranged toward the magnetic circuit structure 210, which helps to improve the rigidity of the annular diaphragm 230 and the reliability of the up and down vibration of the annular diaphragm 230. It is understandable that the radial cross-section of the first annular portion 231 or the second annular portion 232 can also be individually set to an arched shape, which can also improve the rigidity of the annular diaphragm 230. The ring shape of the annular diaphragm 230 can be a circle, an ellipse, a polygon, a rounded rectangle, etc. The first annular portion 231 and the second annular portion 232 are set to corresponding shapes, which are not limited here.

[0062] When setting up the second pronunciation unit, refer to Figure 5 The second sound unit 300 can be a microelectromechanical speaker (MEMS speaker), a piezoelectric ceramic sound plate, an electrostatic speaker, or a flat panel speaker. These second sound units 300 are compact and take up little space, making them easy to fit into the middle of the magnetic circuit structure 210 of the first sound unit 200. This allows for integration of the second sound unit 300 with the first sound unit 200, improving sound quality while reducing the space occupied by the speaker.

[0063] When setting up the basin stand and the first sound unit, refer to Figure 5 , the ratio of the outer diameter of the basin frame 100 to the distance from the bottom surface of the magnetic circuit structure 210 to the bass vibration sound source surface 200a ranges from 1 to 9. The outer diameter of the basin frame 100 refers to the maximum diameter of the basin frame 100, that is, the outer edge diameter of the basin frame 100. The bottom surface of the magnetic circuit structure 210 refers to the side of the magnetic circuit structure 210 facing away from the annular diaphragm 230. The loudspeaker arranges the second sound unit 300 coaxially with the first sound unit 200, and the treble vibration sound source surface 300a and the bass vibration sound source surface 200a are arranged coplanar, making full use of the axial space, meeting the needs of high and low frequencies at the same time, and improving high-frequency response.

[0064] When assembling the basin frame and magnetic circuit structure, refer to Figure 5 The basin frame 100 has a through hole 102, and the magnetic circuit structure 210 is at least partially assembled in the through hole 102; the inner wall of the through hole 102 is provided with a blocking arm 103, combined with Figure 4The magnetic circuit structure 210 has a limiting groove 216, and the blocking arm 103 engages with the limiting groove 216 to limit the position of the magnetic circuit structure 210 relative to the basin frame 100. After the magnetic circuit structure 210 is assembled, the magnetic circuit structure 210 is inserted into the through hole 102 from the bottom end of the basin frame 100. When the blocking arm 103 of the basin frame 100 is installed in the limiting groove 216 of the magnetic circuit structure 210, the blocking arm 103 blocks the magnetic circuit structure 210, achieving axial and circumferential positioning of the magnetic circuit structure 210. The magnetic circuit structure 210 and the basin frame 100 can be connected by bonding, snapping, tight fit or other methods.

[0065] For example, when the first magnetic circuit structure 210 is used, a retaining groove 216 is provided on the edge of the cylindrical portion 2122 of the magnetic base 212, away from the plate-shaped portion 2121. A retaining arm 103 is provided on the edge of the through-hole 102 of the basin frame 100, near the annular diaphragm 230. When the magnetic circuit structure 210 and the basin frame 100 are assembled, the retaining arm 103 engages with the retaining groove 216 to achieve axial positioning of the magnetic circuit structure 210 and the basin frame 100.

[0066] In some embodiments, to control the bass resonance frequency, refer to Figure 4 、 Figure 6 The frame 100 has a first air vent 104 communicating with the annular air gap 211 and a first porous damping layer 105 covering the first air vent 104. The magnetic circuit structure 210 has a second air vent 2123 communicating with the annular air gap 211 and a second porous damping layer 2124 covering the second air vent 2123. These solutions can adjust the airflow through the air vents to control the bass resonant frequency. Multiple first and second air vents 104, 2123 can be provided, extending in an arc or other shapes. The first and second porous damping layers 105, 2124 can be made of porous materials such as non-woven fabrics or micro-perforated materials. It is understood that either the frame 100 having the first air vent 104 and covering the first porous damping layer 105, or the magnetic circuit structure 210 having the second air vent 2123 and covering the second porous damping layer 2124, can also control the bass resonant frequency.

[0067] The embodiment of the present application provides an electronic device, including the above-mentioned speaker. Figure 5The axial dimension of the speaker in the electronic device of the embodiment of the present application is small, which improves space utilization. It can reduce the phase difference between the first pronunciation unit 200 and the second pronunciation unit 300 when outputting sounds of different frequencies, and the spatial position of the musical instrument is more accurate. The elastic suspension 400 is used to elastically support the voice coil 220 and the annular diaphragm 230 on the basin frame 100, which is conducive to the vibration of the voice coil 220 and the annular diaphragm 230 within a predetermined range, reduces the swing polarization, and improves reliability. Specifically, the electronic device can be a mobile phone, a tablet computer, a smart phone, smart glasses, AR / VR equipment, a hearing aid, headphones, a speaker box, etc.

[0068] Finally, it should be noted that the above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A loudspeaker, characterized in that: include: basin rack; A first sounding unit comprises a magnetic circuit structure mounted on the basin frame, an annular diaphragm, and a voice coil connected to the annular diaphragm, wherein the magnetic circuit structure has an annular air gap, the annular diaphragm is spaced from the magnetic circuit structure, at least a portion of the voice coil is accommodated in the annular air gap, and a bass vibration sound source surface is formed at the connection between the voice coil and the annular diaphragm; when an audio current passes through the voice coil in a first magnetic field provided by the magnetic circuit structure, the voice coil is configured to generate a second magnetic field that varies with the audio current; an axial through hole is provided in the middle of the magnetic circuit structure; a bracket is provided in the middle of a side of the magnetic circuit structure facing the annular diaphragm; a vent is provided on a side wall of the bracket, and the annular air gap and the axial through hole are connected via the vent; a second sounding unit, coaxially arranged with the first sounding unit, and mounted in the middle of a side of the magnetic circuit structure facing the annular diaphragm, the sounding frequency of the second sounding unit being greater than the sounding frequency of the first sounding unit, the second sounding unit having a high-pitched vibration sound source surface, the high-pitched vibration sound source surface being coplanar with the low-pitched vibration sound source surface; An elastic suspension for elastically supporting the voice coil and the annular diaphragm on the basin frame; the elastic suspension includes a coaxially arranged inner ring portion, a middle ring portion, and an outer ring portion, a first cantilever connected between the inner ring portion and the middle ring portion, and a second cantilever connected between the middle ring portion and the outer ring portion; the inner ring portion is arranged near the second sound unit and connected to the bracket, the voice coil is connected to the middle ring portion, and the outer ring portion is connected to the basin frame; the annular diaphragm and the voice coil are respectively connected to both sides of the middle ring portion to form a dual-compliance system for controlling sway; when the voice coil vibrates up and down in the annular air gap, the first cantilever and the second cantilever pull on both sides of the inner and outer sides of the middle ring portion; The elastic suspension is a flexible circuit board used to provide audio current to the voice coil and the second sound unit. The outer ring portion has an input terminal. The voice coil is electrically connected to the middle ring portion, and the second sound unit is electrically connected to the inner ring portion.

2. The loudspeaker according to claim 1, wherein The first cantilever and the second cantilever are both arranged in a meandering manner.

3. The loudspeaker according to claim 1, wherein There are multiple first cantilevers, and the multiple first cantilevers are symmetrically arranged around the axis of the middle ring portion; There are multiple second cantilevers, and the multiple second cantilevers are symmetrically arranged with the axis of the middle ring portion as the center.

4. The loudspeaker according to claim 1, wherein A ratio of a diameter difference between the outer ring portion and the middle ring portion to a diameter difference between the middle ring portion and the inner ring portion ranges from 0.6 to 1.

4.

5. The loudspeaker according to claim 1, wherein The magnetic circuit structure includes a magnetic base, a magnet, and a magnetic plate mounted on the magnet; the magnetic base includes a plate-shaped portion and a cylindrical portion connected to the outer edge of the plate-shaped portion; the magnet is mounted on the plate-shaped portion; the outer circumferential surface of the magnet and the outer circumferential surface of the magnetic plate are spaced from the inner wall of the cylindrical portion to form the annular air gap; the annular air gap forms an opening for the voice coil to extend into near one end of the magnetic plate; the cylindrical portion is mounted on the basin frame; Alternatively, the magnetic circuit structure includes a magnetic base, an annular magnet and a magnetic ring, the magnetic base includes a plate-shaped portion and a columnar portion connected to the middle of the plate-shaped portion, the annular magnet is mounted on the plate-shaped portion, and the magnetic ring is mounted on the annular magnet, the inner circumference of the annular magnet and the inner circumference of the magnetic ring are spaced from the outer circumference of the columnar portion to form an annular air gap, the annular air gap forms an opening near one end of the magnetic ring for the voice coil to extend into, and the magnetic base is mounted on the basin frame; Alternatively, the magnetic circuit structure includes a magnetic base, an inner ring magnet, an outer ring magnet, an inner ring magnetic plate and an outer ring magnetic plate, the inner ring magnet and the outer ring magnet are coaxially installed on the magnetic base, the inner ring magnetic plate and the outer ring magnetic plate are installed on the inner ring magnet and the outer ring magnet in a one-to-one correspondence, the inner ring magnetic plate and the outer ring magnetic plate are spaced apart, and an annular air gap is formed between the assembly formed by the inner ring magnet and the inner ring magnetic plate and the assembly formed by the outer ring magnet and the outer ring magnetic plate, the annular air gap forms an opening for the voice coil to extend into near one end of the inner ring magnetic plate, and the magnetic base is installed on the basin frame.

6. The loudspeaker according to any one of claims 1 to 5, characterized in that: The second sounding unit is installed on the bracket.

7. The loudspeaker according to claim 6, characterized in that The bracket has a mounting groove for mounting the second sounding unit, and the mounting groove is communicated with the axial through hole.

8. The loudspeaker according to claim 6, wherein The bracket has a first positioning groove, and the basin frame has a second positioning groove; a first support ring is provided at the first positioning groove, and a second support ring is provided at the second positioning groove; the inner edge of the annular diaphragm is connected to the first support ring, and the outer edge of the annular diaphragm is connected to the second support ring.

9. The loudspeaker according to any one of claims 1 to 5, characterized in that The annular diaphragm includes a first annular portion and a second annular portion that are coaxially arranged, the outer edge of the first annular portion is connected to the inner edge of the second annular portion, and the radial cross-section of the first annular portion and / or the radial cross-section of the second annular portion is arched; the voice coil is connected to the connection between the first annular portion and the second annular portion.

10. The loudspeaker according to any one of claims 1 to 5, characterized in that The second sounding unit is a micro-electromechanical speaker, a piezoelectric ceramic sounding piece, an electrostatic speaker or a flat speaker.

11. The loudspeaker according to any one of claims 1 to 5, characterized in that The ratio of the outer diameter of the basin frame to the distance from the bottom surface of the magnetic circuit structure to the bass vibration sound source surface ranges from 1 to 9.

12. The loudspeaker according to any one of claims 1 to 5, characterized in that The basin frame has a through hole, and the magnetic circuit structure is at least partially assembled in the through hole; the inner wall of the through hole is provided with a stop arm, and the magnetic circuit structure has a limiting groove, and the stop arm is engaged with the limiting groove to limit the position of the magnetic circuit structure relative to the basin frame.

13. The loudspeaker according to any one of claims 1 to 5, characterized in that The basin frame has a first air hole communicating with the annular air gap, and a first porous damping layer for covering the first air hole; And / or, the magnetic circuit structure has a second air hole communicating with the annular air gap, and a second porous damping layer for covering the second air hole.

14. An electronic device, characterized in that: Comprising the loudspeaker according to any one of claims 1 to 13.

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