CN117240952A

CN117240952A - Electronic equipment

Info

Publication number: CN117240952A
Application number: CN202311439065.1A
Authority: CN
Inventors: 李波波; 蔡晓东; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2023-12-15

Abstract

The invention discloses electronic equipment, which comprises a sounding unit and a shell, wherein the sounding unit comprises a first sounding unit, a second sounding unit and a third sounding unit which are integrally arranged, and the second sounding unit and the first sounding unit are arranged in a back-to-back way; the first sound generating unit comprises a first vibrating diaphragm assembly vibrating along a first direction, the second sound generating unit comprises a second vibrating diaphragm assembly vibrating along the first direction, and the sound generating area of the first vibrating diaphragm assembly is larger than that of the second vibrating diaphragm assembly; the third sound generating unit comprises a third vibrating diaphragm assembly vibrating along a second direction, the second direction and the first direction are arranged at an included angle, the third sound generating unit is a high-pitch sound generating unit, and the working frequency band of the third sound generating unit is larger than 2000Hz; the sounding unit is accommodated in the shell, and the shell is provided with a first sounding hole communicated with the first sounding unit, a second sounding hole communicated with the second sounding unit and a third sounding hole communicated with the third sounding unit. The electronic equipment has the advantages of good call privacy and good tone quality.

Description

Electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic, in particular to electronic equipment.

Background

With the rapid development of the consumer electronics industry, consumers are actively demanding a variety of electronic devices. For electronic devices such as intelligent mobile terminals, the higher the requirement of consumers on audio and video experience, for example, a folding screen mobile phone can provide a larger display screen as the intelligent mobile terminal, so that the visual pursuit of people is met, and meanwhile, the terminal device is expected to provide rich audio experience.

The consumer requires the electronic equipment to have the function of privacy protection when in communication, although the current loudspeaker adopts the design of an acoustic dipole to be applied to the intelligent mobile terminal on a large scale, the communication privacy is improved; however, even if the design of the acoustic dipole is adopted, the far-field cancellation bandwidth of the sound can only reach 2000Hz, the middle-high frequency cancellation effect is limited, and the call privacy is still affected.

And, when the speaker is in operation, the front sound cavity is low-pass filtered, and when the frequency of the driving signal is greater than the front cavity resonant frequency Fh, the loudness of the speaker is greatly reduced. At present, the resonance point of a front cavity of a loudspeaker module in an intelligent mobile terminal is usually smaller than 6000Hz, so that the effective frequency band of the loudspeaker is narrowed, and the sound and the color are poor.

Disclosure of Invention

The invention mainly aims to provide electronic equipment, and aims to solve the problems that in the prior art, high-frequency offset effect is limited, call privacy is affected, effective frequency bands of the electronic equipment are narrowed, and tone and color ratio is poor.

To achieve the above object, the present invention proposes an electronic device including:

the sound production unit comprises a first sound production unit, a second sound production unit and a third sound production unit, and the second sound production unit and the first sound production unit are arranged back to back; the first sound generating unit comprises a first vibrating diaphragm assembly vibrating along a first direction, the second sound generating unit comprises a second vibrating diaphragm assembly vibrating along the first direction, and the sound generating area of the first vibrating diaphragm assembly is larger than that of the second vibrating diaphragm assembly; the third sound generating unit comprises a third vibrating diaphragm assembly vibrating along a second direction, the second direction and the first direction form an included angle, the third sound generating unit is a high-pitch sound generating unit, and the working frequency range of the third sound generating unit is larger than 2000Hz;

The shell, sound production monomer accept in the shell, the shell has seted up first sound hole group, first sound hole group include with first sound hole of first sound unit intercommunication, with second sound hole of second sound unit intercommunication and with the third sound hole of third sound unit intercommunication.

Optionally, the first vibrating diaphragm subassembly with the second vibrating diaphragm subassembly divides to locate the sound production monomer is followed the both sides of first direction, the sound production monomer still includes magnetic circuit subassembly, magnetic circuit subassembly is located first vibrating diaphragm subassembly with between the second vibrating diaphragm subassembly, first sound generating unit includes first voice coil loudspeaker voice coil, second sound generating unit includes the second voice coil loudspeaker voice coil, magnetic circuit subassembly is equipped with first magnetic gap and second magnetic gap, the one end of first voice coil loudspeaker voice coil with first vibrating diaphragm subassembly is connected, the other end of first voice coil loudspeaker voice coil is inserted and is located first magnetic gap, the one end of second voice coil loudspeaker voice coil with second vibrating diaphragm subassembly is connected, the other end of second voice coil loudspeaker voice coil is inserted and is located the second magnetic gap.

Optionally, the magnetic circuit assembly includes:

a first side magnet;

a ring magnet, wherein the first side magnet is positioned outside the ring magnet and forms the first magnetic gap with the ring magnet;

And the ring magnet surrounds the periphery of the center magnet and forms the second magnetic gap with the center magnet.

Optionally, the third sound generating unit includes third side magnet, third side magnet with form the third magnetic gap between the first side magnet, the third sound generating unit includes the third voice coil loudspeaker voice coil, the one end of third voice coil loudspeaker voice coil with third vibrating diaphragm subassembly is connected, the other end of third voice coil loudspeaker voice coil is inserted and is located the third magnetic gap.

Optionally, the third voice coil is a flat voice coil, and an axis of the flat voice coil coincides with the first direction.

Optionally, the third voice coil is provided with two extending edges distributed along the second direction at intervals, each extending edge extends along a third direction, the third direction is perpendicular to the first direction and the second direction, one extending edge is connected with the third diaphragm assembly and is located outside the third magnetic gap, and the other extending edge is inserted into the third magnetic gap.

Optionally, the sounding monomer still includes along magnetic yoke and magnetic conduction board that first direction interval set up, magnetic circuit assembly is located magnetic yoke with between the magnetic conduction board, magnetic yoke includes body portion and bending extension, magnetic circuit assembly locates body portion, bending extension locates body portion's one end and orientation are kept away from magnetic circuit assembly's direction is buckled, bending extension with first limit magnet cooperation defines the mounting groove, third limit magnet is located in the mounting groove and with first limit magnet interval sets up formation third magnetic gap.

Optionally, the magnetic conduction board includes limit magnetic conduction board and center magnetic conduction board, first limit magnet deviate from the one side of magnetic conduction yoke with limit magnetic conduction board is connected, ring magnet with center magnet deviate from one side of magnetic conduction yoke all with center magnetic conduction board is connected.

Optionally, the sounding unit further includes a magnetic yoke and a magnetic conductive plate that are disposed along the first direction at intervals, the magnetic circuit assembly is located between the magnetic yoke and the magnetic conductive plate, the third sounding unit includes a central magnet, the magnetic yoke and the magnetic conductive plate are disposed on two sides of the central magnet respectively and form a third magnetic gap with the central magnet, the third sounding unit includes a third voice coil, one end of the third voice coil is connected with the third vibrating diaphragm assembly, and the other end of the third voice coil is inserted in the third magnetic gap.

Optionally, the voice coil of the third sound generating unit is a cylindrical voice coil, and an axis of the cylindrical voice coil is consistent with the second direction.

Optionally, the first sound generating unit has a first rear cavity, the second sound generating unit has a second rear cavity, and the third sound generating unit has a third rear cavity;

The first rear cavity is communicated with the third rear cavity, and the first rear cavity is mutually isolated from the second rear cavity; or, the first rear cavity, the second rear cavity and the third rear cavity are mutually communicated; or, the first rear cavity, the second rear cavity and the third rear cavity are isolated from each other.

Optionally, the outer fringe of shell forms the center, screen and back lid are installed to the lateral part of shell, the shell is gone up and is located the center top with the position between the screen top and/or the center top with the position between the back lid top all forms the installation limit, first sound hole is located the center top, second sound hole is close to first sound hole sets up and is located the installation limit, third sound hole is located the center top or the installation limit.

Optionally, the casing includes two rectangular folding shells capable of being folded or unfolded along a long side thereof, wherein the screen is mounted on opposite sides of one folding shell, and the screen and the rear cover are mounted on opposite sides of the other folding shell respectively;

wherein the sounding monomer is accommodated in the folding shell, the first sound hole is positioned at the top of the middle frame corresponding to the folding shell, the second sound hole is positioned at the mounting edge corresponding to the folding shell, and the third sound hole is positioned at the top of the middle frame or the mounting edge corresponding to the folding shell.

Optionally, the number of sound production monomer is a plurality of, and a plurality of sound production monomer divides to locate two folding shell, be located a plurality of in the same folding shell sound production monomer sets up side by side and shares along the width direction of this folding screen first sound hole group.

Optionally, when the two folding shells are folded, the first sound hole group located on one folding shell and the first sound hole group located on the other folding shell are arranged opposite to each other or are arranged in a staggered mode.

Optionally, the electronic device further includes a double-sided sound generating unit, where the double-sided sound generating unit is accommodated in the other folding shell, and the double-sided sound generating unit includes a fourth sound generating unit and a fifth sound generating unit that are disposed back to back; the folding shell is provided with a second sound hole group, and the second sound hole group comprises a fourth sound hole communicated with the fourth sound unit and a fifth sound hole communicated with the fifth sound unit; the fourth sound hole is positioned at the top of the middle frame corresponding to the folding shell, and the fifth sound hole is positioned at the position, close to the fourth sound hole, of the mounting edge corresponding to the folding shell.

Optionally, when the two folding shells are folded, the first sound hole group and the second sound hole group are arranged opposite to each other or are arranged in a staggered manner.

Optionally, the number of two-sided sound production unit is a plurality of, and a plurality of two-sided sound production unit divide to locate two folding shell, be located a plurality of two-sided sound production unit in the same folding shell is followed folding screen's width direction sets up side by side and shares second sound hole group.

Optionally, the shell is a rectangular shell, the screen and the rear cover are respectively arranged at two opposite sides of the shell, and the number of the sounding monomers is one or more; when the number of the sounding monomers is multiple, the sounding monomers are arranged side by side along the width direction of the shell, and the sounding monomers share the first sound hole group, or the shell is provided with one first sound hole group corresponding to each sounding monomer.

According to the electronic equipment, the sounding unit is arranged and comprises the first sounding unit, the second sounding unit and the high-frequency sounding unit, the first sounding unit and the second sounding unit are arranged back to back, the first vibrating diaphragm assembly of the first sounding unit and the second vibrating diaphragm assembly of the second sounding unit vibrate along the first direction, the third vibrating diaphragm assembly of the high-frequency sounding unit vibrates along the second direction, the first direction and the second direction form an included angle, the working frequency band of the high-frequency sounding unit is larger than 2000Hz, the first sound hole, the second sound hole and the third sound hole are formed in the shell, the first sounding unit, the second sounding unit and the high-frequency sounding unit can respectively pass through the first sound hole, the second sound hole and the third sound Kong Chusheng, the superposition sound field after 2000Hz of the electronic equipment can be offset, the middle-high frequency offset effect can be improved, the far-field offset frequency bandwidth of sound can be larger than 2000Hz, the middle-high frequency sound leakage can be greatly reduced, the privacy of the electronic equipment can be further improved, the sound color can be effectively widened, and the color can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram illustrating an assembly of sound-emitting units in an electronic device according to an embodiment of the invention;

FIG. 2 is an exploded view of a sound emitting unit of an electronic device according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a sound emitting unit in an electronic device according to an embodiment of the invention;

FIG. 4 is a schematic cross-sectional view of a sound emitting unit in an electronic device according to another embodiment of the present invention;

FIG. 5 is a schematic plan view of a sound module in an electronic device according to an embodiment of the invention;

FIG. 6 is a schematic view in section B-B of FIG. 5;

FIG. 7 is a schematic view in section A-A of FIG. 5;

FIG. 8 is a schematic diagram of a partial structure of an electronic device according to the present invention;

FIG. 9 is a schematic view of section D-D of FIG. 8 according to an embodiment;

FIG. 10 is a schematic view of the cross-section C-C of FIG. 8 according to an embodiment;

FIG. 11 is a schematic view of the section D-D of FIG. 8 according to another embodiment;

FIG. 12 is a schematic view of the section D-D of FIG. 8 according to another embodiment;

FIG. 13 is a schematic view of the section D-D of FIG. 8 according to a further embodiment;

FIG. 14 is a schematic view of section D-D of FIG. 8 according to yet another embodiment;

fig. 15 is a schematic perspective view illustrating a structure of an electronic device according to an embodiment of the present invention when two folding cases are folded;

FIG. 16 is a schematic perspective view showing the two folding shells of the electronic device according to an embodiment of the present invention;

fig. 17 (1) is a schematic perspective view of a first sound emitting component on one of the folding shells in an electronic device according to an embodiment of the present invention, and (2) is a schematic perspective view of the first sound emitting component on the other folding shell;

fig. 18 (3) is a schematic perspective view of one view angle when two folding shells of the electronic device in accordance with an embodiment of the present invention each contain a sounding monomer, and (4) is a schematic perspective view of the other view angle;

fig. 19 (5) is a schematic perspective view of one view angle when two folding shells of the electronic device according to another embodiment of the present invention each contain a sounding monomer, and (6) is a schematic perspective view of the other view angle;

fig. 20 (7) is a schematic perspective view of one view angle when two folding shells of the electronic device according to an embodiment of the present invention respectively house a sounding unit and a double-sided sounding unit, and (8) is a schematic perspective view of the other view angle;

FIG. 21 is a schematic plan view of a foldable housing of an electronic device housing a two-sided sound unit according to an embodiment of the present invention;

FIG. 22 is a schematic view in section E-E of FIG. 21;

FIG. 23 is a schematic diagram of a dual-sided sound generating unit in an electronic device according to an embodiment of the present invention;

FIG. 24 is a schematic perspective view of an electronic device according to another embodiment of the present invention;

FIG. 25 is a schematic perspective view of an electronic device housing two sound emitting units according to another embodiment of the present invention;

fig. 26 is a schematic perspective view showing a case of an electronic device according to another embodiment of the present invention when two folding cases are folded.

Reference numerals illustrate:

100. a sounding monomer; 10. a first sound generating unit; 10a, SPK unit; 11. a first diaphragm assembly; 111. a first diaphragm; 112. a first vibration plate; 12. a first voice coil; 13. a first housing; 14. a first front cavity; 15. a first rear cavity; 20. a second sound generating unit; 20a, RCV units; 21. a second diaphragm assembly; 211. a second diaphragm; 212. a second vibration plate; 22. a second voice coil; 23. a second housing; 24. a second front cavity; 25. a second rear cavity; 26. a front cover; 30. a third sound generating unit; 30a, a high-pitch sounding unit; 31. a third diaphragm assembly; 311. a third diaphragm; 312. a third vibration plate; 32. a third voice coil; 321. an extension edge; 33. a third side magnet; 34. a third magnetic gap; 35. a center magnet; 36. a third housing; 37. a third front cavity; 38. a third rear cavity; 39. a central magnetically permeable plate; 40. a first magnetic circuit assembly; 41. a first magnetic gap; 42. a second magnetic gap; 43. a first side magnet; 44. a ring magnet; 45. a center magnet; 46. an auxiliary magnetic conductive plate; 50. a magnetic yoke; 51. a body portion; 52. bending the extension part; 53. a mounting groove; 60. a magnetic conductive plate; 61. a side magnetic conductive plate; 62. a central magnetically permeable plate; 70. FPCB; 80. a steel mesh; 90. centering support pieces; 200. a sounding module; 201. a protective shell; 202. a first sound outlet channel; 203. a third sound outlet channel; 300. an electronic device; 301. a first acoustic port; 302. a second sound hole; 303. a third sound hole; 304. a housing; 305. folding the shell; 306. a screen; 306a, a main screen; 306b, secondary screen; 3061. a first screen; 3062. a second screen; 307. a rear cover; 308. a middle frame; 309. a mounting edge; 400. a double-sided sound generating unit; 401. a fourth sound generating unit; 4011. a fourth diaphragm assembly; 4012. a fourth voice coil; 402. a fifth sound generating unit; 4021. a fifth diaphragm assembly; 4022. a fifth voice coil; 403. a second magnetic circuit assembly; 4031. a fourth magnetic gap; 4032. a fifth magnetic gap; 404. a fourth acoustic port; 405. a fifth sound hole; 406. and a sound emitting surface.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

As shown in fig. 1 to 26, the present invention proposes an electronic device 300, the electronic device 300 includes a sounding unit 100 and a housing 304, wherein the sounding unit 100 includes a first sounding unit 10, a second sounding unit 20 and a third sounding unit 30, and the second sounding unit 20 and the first sounding unit 10 are disposed opposite to each other; the first sound generating unit 10 comprises a first diaphragm assembly 11 vibrating along a first direction, the second sound generating unit 20 comprises a second diaphragm assembly 21 vibrating along the first direction, and the sound generating area of the first diaphragm assembly 11 is larger than that of the second diaphragm assembly 21; the third sound generating unit 30 comprises a third vibrating diaphragm assembly 31 vibrating along a second direction, the second direction and the first direction form an included angle, the third sound generating unit 30 is a high-pitch sound generating unit 30a, and the working frequency range of the third sound generating unit 30 is larger than 2000Hz; the sounding unit 100 is accommodated in a housing 304, and the housing 304 is provided with a first sounding hole group, wherein the first sounding hole group comprises a first sounding hole 301 communicated with the first sounding unit 10, a second sounding hole 302 communicated with the second sounding unit 20, and a third sounding hole 303 communicated with the third sounding unit 30. Alternatively, the first sound generating unit 10, the second sound generating unit 20, and the third sound generating unit 30 may be integrally provided, thereby improving the structural integration of the sound generating unit 100 and improving the assembly efficiency.

The electronic device 300 of the present invention may be a mobile phone, tablet or computer, and the mobile phone is a straight screen mobile phone or a folding screen mobile phone. The electronic device 300 of the present embodiment is illustrated as a mobile phone. The sounding unit 100 of the electronic device 300 of the present invention may be a speaker unit, and the sounding unit 100 may be applied to the sounding module 200 of the electronic device 300, and the embodiment takes the sounding unit 100 as the speaker unit for illustration.

In an embodiment, the first sound generating unit 10 is a speaker unit, hereinafter referred to as an SPK unit 10a, the second sound generating unit 20 is a receiver unit, hereinafter referred to as an RCV unit 20a, the first diaphragm assembly 11 of the SPK unit 10a and the second diaphragm assembly 21 of the RCV unit 20a vibrate and generate sound along the first direction, the sound generating area of the first diaphragm assembly 11 is larger, and the sound generating area of the second diaphragm assembly 21 is smaller, so as to respectively meet the sound generating requirements of the SPK unit 10a and the RCV unit 20 a. The casing 304 is provided with a first sound hole group, the first sound hole group comprises a first sound hole 301, a second sound hole 302 and a third sound hole 303, the first sound generating unit 11 generates sound through the first sound hole 31, the second sound generating unit 12 generates sound through the second sound hole 32, and the third sound generating unit 30 generates sound through the third sound hole 33.

As shown in fig. 1 to 4, the SPK unit 10a and the RCV unit 20a are disposed opposite to each other, specifically, the RCV unit 20a is located in front of the SPK unit 10a, the first diaphragm assembly 11 of the SPK unit 10a and the second diaphragm assembly 21 of the RCV unit 20a vibrate in a first direction, and the third diaphragm assembly 31 of the treble sound generating unit 30a vibrates in a second direction, which forms an included angle with the first direction. In an embodiment, the first direction is the front-back direction shown in fig. 1 and 2, the second direction is the up-down direction shown in fig. 1 and 2, and the first direction and the second direction are perpendicular to each other. In other embodiments, the first direction and the second direction are not identical, i.e. are arranged at an included angle. The present embodiment will be described taking the first direction as the front-rear direction and the second direction as the up-down direction as an example.

The electronic device 300 of the present invention has two modes of operation, namely a speaker mode (SPK mode) and a receiver mode (RCV mode).

When a call is to be received, the electronic device 300 can be in the RCV mode, and the SPK unit 10a and the RCV unit 20a vibrate in the same direction to generate sound waves with the same amplitude and opposite phases, so that a dipole effect is formed, and the call privacy is improved. And, the high-pitch sounding unit 30a works with the working frequency band larger than 2000Hz, can offset the superimposed sound field after the sounding single far field is 2000Hz, improves the middle-high frequency offset effect, ensures that the far field offset bandwidth of sound can be larger than 2000Hz, widens the sound offset frequency band, greatly reduces middle-high frequency leakage sound and further improves the call privacy. It should be noted that, the superimposed sound field referred to in the present invention includes both an enhanced sound field and a cancel sound field.

When the external sound is required, the electronic device 300 can be in the SPK mode, and only the SPK unit 10a and the high-pitch sound generating unit 30a work, and the SPK unit 10a is used as a low-pitch sound generating unit and works in a frequency division manner with the high-pitch sound generating unit 30a, so that the frequency band of the sound generating unit 100 is effectively widened, and the tone quality is improved.

The sounding unit 100 of the present invention is applied to the sounding module 200, the sounding module 200 uses frequency division, the frequency division point is set after the front cavity resonant frequency Fh of the SPK unit 10a, and the frequency division point frequency cannot be the resonant frequency F0 of the high-pitch sounding unit 30a, i.e. the frequency division point frequency is greater than Fh and not equal to F0. When the driving frequency is less than or equal to the division point frequency, the SPK unit 10a operates; when the driving frequency is greater than the division point frequency, the treble sound generating unit 30a operates. That is, after framing, the transient signal is played back with a low frequency signal less than the crossover point frequency and a high frequency signal greater than the crossover point frequency. Although the SPK unit 10a and the treble unit 30a are divided in the frequency domain, since there are both low frequency signals and high frequency signals in the reproduced frame signal, the SPK unit 10a and the treble unit 30a operate together in the time domain.

It will be appreciated that the front cavity resonant frequency Fh may be 6000Hz, and the crossover point frequency is greater than 6000Hz, and when the driving frequency is greater than the crossover point frequency, the treble sound generating unit 30a operates without reducing the loudness of the sound generating unit 100.

If the upper limit frequency of cancellation of the treble sound generating unit 30a is Fc, that is, if the cancellation frequency of the treble sound generating unit 30a is 2000Hz to Fc, it is necessary to ensure that the resonance frequency F0 of the treble sound generating unit 30a is less than 2000Hz, or that F0 is greater than Fc.

According to the electronic equipment 300, the sounding unit 100 is arranged, the sounding unit 100 comprises the first sounding unit 10, the second sounding unit 20 and the high-sound sounding unit 30a which are integrally arranged, the first sounding unit 10 and the second sounding unit 20 are arranged back to back, the first vibrating diaphragm assembly 11 of the first sounding unit 10 and the second vibrating diaphragm assembly 21 of the second sounding unit 20 vibrate along the first direction, the third vibrating diaphragm assembly 31 of the high-sound sounding unit 30a vibrates along the second direction, the first direction and the second direction form an included angle, the working frequency band of the high-sound sounding unit 30a is larger than 2000Hz, the first sound hole 301, the second sound hole 302 and the third sound hole 303 are formed in the shell 301, the first sounding unit 10, the second sounding unit 20 and the high-sound sounding unit 30a can sound through the first sound hole 301, the second sound hole 302 and the third sound hole 303 respectively, the superposition sound field below 2000Hz of the electronic equipment 300 can be offset, the middle-high frequency offset effect can be improved, the far-field offset frequency bandwidth of the sound can be larger than 2000Hz, the sound can be greatly expanded, the middle-sound frequency offset can be greatly reduced, the high-frequency band can be further, the sound frequency can be further increased, and the privacy frequency band can be further increased, and the sound frequency can be further leaked.

In an embodiment, the first diaphragm assembly 11 and the second diaphragm assembly 21 are respectively disposed at two sides of the sounding unit 100 along the first direction, the sounding unit 100 further includes a first magnetic circuit assembly 40, the first magnetic circuit assembly 40 is disposed between the first diaphragm assembly 11 and the second diaphragm assembly 21, the first sounding unit 10 includes a first voice coil 12, the second sounding unit 20 includes a second voice coil 22, the first magnetic circuit assembly 40 is provided with a first magnetic gap 41 and a second magnetic gap 42, one end of the first voice coil 12 is connected with the first diaphragm assembly 11, the other end of the first voice coil 12 is inserted into the first magnetic gap 41, one end of the second voice coil 22 is connected with the second diaphragm assembly 21, and the other end of the second voice coil 22 is inserted into the second magnetic gap 42.

As shown in fig. 1 to 4, the first diaphragm assembly 11 is disposed at the rear side of the sounding unit 100, the second diaphragm assembly 21 is disposed at the front side of the sounding unit 100, the first magnetic circuit assembly 40 is disposed between the first diaphragm assembly 11 and the second diaphragm assembly 21, and the first magnetic circuit assembly 40 is provided with a first magnetic gap 41 for inserting the front end of the first voice coil 12 to realize the front-back vibration of the first voice coil 12 and the first diaphragm assembly 11, and the first magnetic circuit assembly 40 is also provided with a second magnetic gap 42 for inserting the rear end of the second voice coil 22 to realize the front-back vibration of the second voice coil 22 and the second diaphragm assembly 21. The first magnetic circuit assembly 40 of the sounding unit 100 of the present embodiment has the first magnetic gap 41 and the second magnetic gap 42, so that the first sounding unit 10 and the second sounding unit 20 share the first magnetic circuit assembly 40, which simplifies the structure of the first magnetic circuit assembly 40 and is compact.

In one embodiment, the first magnetic circuit assembly 40 includes a first side magnet 43, a ring magnet 44, and a center magnet 45, the first side magnet 43 being located outside the ring magnet 44 and forming a first magnetic gap 41 with the ring magnet 44; the ring magnet 44 surrounds the outer periphery of the center magnet 45 and forms a second magnetic gap 42 with the center magnet 45. The first side magnet 43, the ring magnet 44 and the center magnet 45 are arranged, so that the first magnetic circuit assembly 40 has the first magnetic gap 41 and the second magnetic gap 42, and the structural arrangement is reasonable and simple.

Further, the third sound generating unit 30 includes a third side magnet 33, a third magnetic gap 34 is formed between the third side magnet 33 and the first side magnet 43, the third sound generating unit 30 includes a third voice coil 32, one end, i.e. the upper end, of the third voice coil 32 is connected with the third diaphragm assembly 31, and the other end, i.e. the lower end, of the third voice coil 32 is inserted into the third magnetic gap 34, so as to realize the up-down vibration of the third voice coil 32 and the third diaphragm assembly 31. The first side magnet 43 may be matched with the ring magnet 44 to form the first magnetic gap 41, and may be matched with the first side magnet 43 to form the third magnetic gap 34, that is, the third sounding unit 30 and the first sounding unit 10 share the first side magnet 43, so that the structure of the magnetic circuit system of the sounding unit 100 is simplified, the compactness of the structure is improved, and the cost can be saved. The third side magnet 33 and the first side magnet 43 can form a complete magnetic circuit, and can provide a high-induction magnetic field for the high-pitched sound generating unit 30a without lowering the first sound generating unit 10 and the second sound generating unit 20 BL.

As shown in fig. 2 and 3, in an embodiment, the third voice coil 32 is a flat voice coil, and the axis of the flat voice coil coincides with the first direction, i.e., the axis of the flat voice coil extends in the front-rear direction. The flat voice coil has a small thickness and occupies a small space in the front-rear direction, and the structural compactness of the voice unit 100 is improved.

Further, the third voice coil 32 is provided with two extending edges 321 spaced apart along the second direction, each extending edge 321 extends along a third direction, and the third direction is perpendicular to the first direction and the second direction, respectively, wherein one extending edge 321 is connected with the third diaphragm assembly 31 and is located outside the third magnetic gap 34, and the other extending edge 321 is inserted into the third magnetic gap 34.

As shown in fig. 1 and 2, the third direction is a left-right direction perpendicular to the first direction and the second direction. The two extending edges 321 of the flat voice coil are vertically distributed at intervals, each extending edge 321 extends along the left-right direction, wherein the extending edge 321 at the upper side is connected with the third diaphragm assembly 31 and is positioned outside the third magnetic gap 34 to play a supporting role on the third diaphragm assembly 31, the extending edge 321 at the lower side is inserted into the third magnetic gap 34, and when a signal is excited, a driving force is provided for the third diaphragm assembly 31 to realize vertical vibration, and the structural design is reasonable.

In an embodiment, the sounding unit 100 further includes a magnetic conductive yoke 50 and a magnetic conductive plate 60 disposed at intervals along the first direction, the first magnetic circuit assembly 40 is located between the magnetic conductive yoke 50 and the magnetic conductive plate 60, the magnetic conductive yoke 50 includes a body portion 51 and a bending extension portion 52, the first magnetic circuit assembly 40 is disposed on the body portion 51, the bending extension portion 52 is disposed on one end of the body portion 51 and bends towards a direction away from the first magnetic circuit assembly 40, the bending extension portion 52 cooperates with the first side magnet 43 to define a mounting slot 53, and the third side magnet 33 is located in the mounting slot 53 and is disposed at intervals with the first side magnet 43 to form the third magnetic gap 34.

As shown in fig. 2 and 3, the magnetic conductive yoke 50 is located in front of the magnetic conductive plate 60, and the first magnetic circuit assembly 40 of the sounding unit 100 is located between the magnetic conductive yoke 50 and the magnetic conductive plate 60, and the magnetic conductive yoke 50 and the magnetic conductive plate 60 function to conduct magnetic force and correct magnetic induction lines. In order to facilitate the installation of the third side magnet 33, the upper end of the body portion 51 of the magnetic yoke 50 is bent forward to form a bent extension portion 52, and the bent extension portion 52 and the first side magnet 43 cooperate to define an installation groove 53, so as to realize the installation of the third side magnet 33, and the structural design is ingenious and reasonable. The magnetic yoke 50 can be provided with the first magnetic circuit assembly 40 and the third side magnet 33, and has strong compatibility and good structural compactness.

In one embodiment, the magnetic conductive plate 60 includes a side magnetic conductive plate 61 and a center magnetic conductive plate 62, and the side of the first side magnet 43 facing away from the magnetic conductive yoke 50 is connected to the side magnetic conductive plate 61, and the sides of the ring magnet 44 and the center magnet 45 facing away from the magnetic conductive yoke 50 are connected to the center magnetic conductive plate 62.

As shown in fig. 2 and 3, the side magnetic plate 61 is provided corresponding to the first side magnet 43, and the rear side of the first side magnet 43 is connected to the side magnetic plate 61, and the side magnetic plate 61 functions to conduct magnetism and correct magnetic induction lines. The central magnetic conductive plate 62 is disposed corresponding to the ring magnet 44 and the central magnet 45, and the rear sides of the ring magnet 44 and the central magnet 45 facing away from the magnetic conductive yoke 50 are connected with the central magnetic conductive plate 62, the central magnetic conductive plate 62 plays roles in magnetic conduction and magnetic induction line correction, and the ring magnet 44 and the central magnet 45 share the central magnetic conductive plate 62, so that the structure of the sounding unit 100 is simplified. The center magnet 45 is further provided with a sub-magnetic conductive plate 46 on a side facing the magnetic yoke 50, and the sub-magnetic conductive plate 46 also plays a role in magnetic conduction and magnetic induction line correction.

As shown in fig. 4, in another embodiment, the sounding unit 100 further includes a magnetic yoke 50 and a magnetic conductive plate 60 disposed at intervals along the first direction, the first magnetic circuit assembly 40 is located between the magnetic yoke 50 and the magnetic conductive plate 60, the third sounding unit 30 includes a central magnet 35, the magnetic yoke 50 and the magnetic conductive plate 60 are separately disposed at two sides of the central magnet 35 and form a third magnetic gap 34 with the central magnet 35, the third sounding unit 30 includes a third voice coil 32, one end of the third voice coil 32 is connected with the third diaphragm assembly 31, and the other end of the third voice coil 32 is inserted into the third magnetic gap 34.

Specifically, the magnetic conductive yoke 50 is located in front of the magnetic conductive plate 60, and the first magnetic circuit assembly 40 of the sounding unit 100 is located between the magnetic conductive yoke 50 and the magnetic conductive plate 60, and the magnetic conductive yoke 50 and the magnetic conductive plate 60 play a role in magnetic conduction and magnetic induction line correction. The third sound generating unit 30 includes a central magnet 35, the central magnet 35 may be disposed adjacent to the first side magnet 43, the magnetic yoke 50 and the magnetic conductive plate 60 are disposed on the front and rear sides of the central magnet 35, and form a third magnetic gap 34 with the central magnet 35, the upper end of the third voice coil 32 is connected to the third diaphragm assembly 31, and the lower end of the third voice coil 32 is inserted into the third magnetic gap 34, so as to realize the up-down vibration of the third voice coil 32 and the third diaphragm assembly 31.

In this embodiment, the side of the central magnet 35 facing the third diaphragm assembly 31 is further provided with a central magnetic conductive plate 39, and the central magnetic conductive plate 39 can perform the functions of magnetic conduction and magnetic induction line correction. The magnetic conductive plate 60 includes a side magnetic conductive plate 61 and a center magnetic conductive plate 62, and the side of the first side magnet 43 facing away from the magnetic conductive yoke 50 is connected to the side magnetic conductive plate 61, and the sides of the ring magnet 44 and the center magnet 45 facing away from the magnetic conductive yoke 50 are connected to the center magnetic conductive plate 62.

Further, the voice coil of the third voice unit 30 is a cylindrical voice coil, and the axis of the cylindrical voice coil coincides with the second direction, that is, the axis of the cylindrical voice coil extends in the up-down direction. The shape of the tubular voice coil and the shape of the third vibrating diaphragm assembly 31 are consistent, the tubular voice coil is convenient to install with the third vibrating diaphragm assembly 31, and the contact area of the tubular voice coil and the third vibrating diaphragm assembly 31 is large, so that the third vibrating diaphragm assembly 31 can be driven to vibrate.

As shown in fig. 1 to 4, in an embodiment, the first sound generating unit 10 includes a first housing 13, and the first diaphragm assembly 11 is mounted to the first housing 13; the third sound generating unit 30 includes a third housing 36, the third housing 36 is mounted on one side of the first housing 13 along the second direction, and the third diaphragm assembly 31 is mounted on the third housing 36.

The first vibrating diaphragm assembly 11 is mounted on the first shell 13, so that the first vibrating diaphragm assembly 11 and the first shell 13 are assembled, the third vibrating diaphragm assembly 31 is mounted on the third shell 36, the third vibrating diaphragm assembly 31 and the third shell 36 are assembled, and the third shell 36 is mounted on one side of the first shell 13 along the second direction, namely along the up-down direction, so that the structure design is reasonable and the assembly is convenient. In an embodiment, the third housing 36 is mounted on the upper side of the first housing 13.

Further, the first housing 13 and the third housing 36 are formed into an integrally formed part, so that assembly steps and assembly errors are omitted, the manufacturing is easy, the first housing 13 and the third housing 36 do not need to be manufactured independently, the manufacturing cost is reduced, the first housing 13 and the third housing 36 are integrally formed, the integrated design is realized, the structure is compact, the space occupation is reduced, and the miniaturized design is facilitated. Furthermore, the first housing 13 and the third housing 36 are plastic material parts, and the first housing 13 and the third housing 36 are integrally injection molded, which is beneficial to manufacturing, easy to obtain materials, light in weight and meets the design requirement of light weight.

In an embodiment, the first housing 13 extends along the second direction, the third housing 36 extends along the first direction, and the third housing 36 is located at one side of the first housing 13.

As shown in fig. 2, the first housing 13 is extended in the up-down direction, i.e., extended in the horizontal direction, so as to mount the first diaphragm assembly 11 and to realize the vibration of the first diaphragm assembly 11 in the front-rear direction; the third casing 36 extends in the front-rear direction, i.e., extends in the vertical direction, so as to mount the third diaphragm assembly 31 and realize the up-down vibration of the third diaphragm assembly 31, and the third casing 36 is located on the upper side of the first casing 13, so that the structural design is reasonable and compact.

As shown in fig. 5 to 14, the first diaphragm assembly 11 and the first housing 13 enclose a first rear cavity 15, the second sound generating unit 20 includes a second housing 23, the second diaphragm assembly 21 and the second housing 23 enclose a second rear cavity 25, and the third diaphragm assembly 31 and the third housing 36 enclose a third rear cavity 38. The first diaphragm assembly 11 includes an annular first diaphragm 111 and a first diaphragm connected to an inner edge of the first diaphragm 111, the second diaphragm assembly 21 includes an annular second diaphragm 211 and a second diaphragm connected to an inner edge of the second diaphragm 211, and the third diaphragm assembly 31 includes an annular third diaphragm 311 and a third diaphragm connected to an inner edge of the third diaphragm 311.

As shown in fig. 1 and 2, the sounding unit 100 further includes an FPCB70, a front cover 26, a steel mesh 80, a centering support sheet 90, and the like, where the FPCB70 realizes circuit conduction of the sounding unit 100, the front cover 26 is mounted on the second housing 23 to play a role in protecting, the steel mesh 80 is mounted on the magnetic yoke 50 and is disposed outside the sound hole of the sounding unit 100 to play a role in ventilation and isolation of sound-absorbing particles, and the centering support sheet 90 plays a role in centering and avoids polarization.

As shown in fig. 5 to 10, in an embodiment, the first sound generating unit 10 has a first rear chamber 15, the second sound generating unit 20 has a second rear chamber 25, the third sound generating unit 30 has a third rear chamber 38, the first rear chamber 15 communicates with the third rear chamber 38 and the first rear chamber 15 is isolated from the second rear chamber 25. It will be appreciated that the first rear cavity 15 is in communication with the third rear cavity 38, and the first rear cavity 15 is isolated from the second rear cavity 25, so that the third rear cavity 38 is also isolated from the second rear cavity 25, and the second rear cavity 25 can be in communication with the entire rear cavity of the electronic device 300 described below.

In this embodiment, when in the SPK mode, only the SPK unit 10a and the treble unit 30a are operated, and the treble unit 30a widens the playback frequency band;

when in the RCV mode, the SPK unit 10a and the RCV unit 20a vibrate in the same direction, sound waves with the same amplitude and opposite phases are generated, and an acoustic dipole effect is formed, so that the call privacy is improved. The high-frequency sound generating unit 30a works in a working frequency band larger than 2000Hz to offset the superposition sound field of the far field of the electronic equipment 300, and the middle-high frequency offset effect is improved, so that middle-high frequency sound leakage is greatly reduced, and the call privacy is further improved.

As shown in fig. 8, 11 and 12, in another embodiment, the first sound generating unit 10 has a first rear chamber 15, the second sound generating unit 20 has a second rear chamber 25, the third sound generating unit 30 has a third rear chamber 38, and the first rear chamber 15, the second rear chamber 25 and the third rear chamber 38 communicate with each other.

In this embodiment, when in the SPK mode, the SPK unit 10a, the RCV unit 20a, and the treble sound generating unit 30a operate simultaneously, the SPK unit 10a vibrates in opposite directions with the RCV unit 20a, generating sound waves in the same phase, and the sound waves overlap with each other, enhancing the playback effect, and the treble sound generating unit 30a widens the sound playback frequency band.

When in RCV mode, there are two cases:

first case: only the RCV unit 20a and the treble sound generating unit 30a work, and since the second rear cavity 25 and the third rear cavity 38 are mutually communicated, when the RCV unit 20a works, the SPK unit 10a is driven to vibrate in the same direction, and vibration in the same amplitude and opposite phase is generated, so that a sound dipole effect is formed, and the call privacy is improved. The high-frequency sound generating unit 30a works in a working frequency band larger than 2000Hz to offset the superposition sound field of the far field of the electronic equipment 300, and the middle-high frequency offset effect is improved, so that middle-high frequency sound leakage is greatly reduced, and the call privacy is further improved;

Second case: the SPK unit 10a, the RCV unit 20a and the treble sound generating unit 30a all work, and the SPK unit 10a and the RCV unit 20a vibrate in the same direction to generate sound waves with the same amplitude and opposite phases, so that an acoustic dipole effect is formed, and the call privacy is improved. The high-frequency sound generating unit 30a works in a working frequency band larger than 2000Hz to offset the superposition sound field of the far field of the electronic equipment 300, and the middle-high frequency offset effect is improved, so that middle-high frequency sound leakage is greatly reduced, and the call privacy is further improved.

As shown in fig. 8, 13 and 14, in still another embodiment, the first sound generating unit 10 has a first rear chamber 15, the second sound generating unit 20 has a second rear chamber 25, the third sound generating unit 30 has a third rear chamber 38, and the first rear chamber 15, the second rear chamber 25 and the third rear chamber 38 are isolated from each other, i.e., the first rear chamber 15, the second rear chamber 25 and the third rear chamber 38 are disposed independently of each other.

As shown in fig. 5 to 7, the electronic device 300 of the present invention includes a housing 301 and a sound generating module 200 accommodated in the housing 301, the sound generating module 200 includes a protective case 201 and a sound generating unit 100 installed in the protective case 201, the protective case 201 has a first sound generating channel 202 and a third sound generating channel 203, the first sound generating unit 10 has a first front cavity 14, the first sound generating channel 202 communicates with the first front cavity 14, the third sound generating unit 30 has a third front cavity 37, and the third sound generating channel 203 communicates with the third front cavity 37.

The sounding unit 100 is installed in the protective housing 201, wherein a first front cavity 14 is enclosed between the first diaphragm assembly 11 of the first sounding unit 10 and the protective housing 201, and the first sounding channel 202 is communicated with the first front cavity 14 to realize sound transmission. A third front cavity 37 is enclosed between the third diaphragm assembly 31 of the third sound generating unit 30 and the protective shell 201, and the third sound generating channel 203 is communicated with the third front cavity 37 to realize sound transmission. The second sound generating unit 20 has a second front cavity 24, and a second front cavity 24 is enclosed between the second diaphragm assembly 21 and the front cover 26 of the second sound generating unit 20, so as to realize sound transmission. The first sound hole 301 communicates with the first sound emission channel 202, thereby realizing sound emission. The second sound generating unit 20 has a second front cavity 24, and the second sound hole 302 communicates with the second front cavity 24 to realize sound generation. The third sound hole 303 communicates with the third sound outlet channel 203 to realize sound outlet. In fig. 6 and 7, the dashed arrows in fig. 9 to 14 indicate the sound transmission directions.

As shown in fig. 15 to 26, in an embodiment, the outer edge of the housing 304 forms a middle frame 308, the side of the housing 304 is provided with a screen 306 and a rear cover 307, a mounting edge 309 is formed on the housing 304 at a position between the top of the middle frame 308 and the top of the screen 306 and/or between the top of the middle frame 308 and the top of the rear cover 307, the first sound hole 301 is located at the top of the middle frame 308, the second sound hole 302 is located adjacent to the first sound hole 301 and at the mounting edge 309, and the third sound hole 303 is located at the top of the middle frame 308 or the mounting edge 309.

For example, the housing 304 is a complete machine housing 304, and the sounding unit 100 can be disposed near the top of the housing. The screen 306 and the rear cover 307 are respectively a mobile phone screen 306 and a mobile phone rear cover 307, the outer edge of the shell 304, in particular the circumferential outer edge thereof, forms a middle frame 308, a mounting edge 309 can be formed at a position between the top of the middle frame 308 and the top of the screen 306, a mounting edge 309 can also be formed at a position between the top of the middle frame 308 and the top of the rear cover 307, the first sound hole 301 is positioned at the top of the middle frame 308, the second sound hole 302 is positioned at the mounting edge 309 and is close to the first sound hole 301, the third sound hole 303 is positioned at the top of the middle frame 308 or the mounting edge 309, and the layout is reasonable, thereby being beneficial to answering calls or playing sounds.

As shown in fig. 15 to 20 and 26, in one embodiment, the outer case 304 includes two rectangular folding cases 305 that can be folded or unfolded with each other along the long sides thereof, wherein the screen 306 is mounted on opposite sides of one folding case 305, and the screen 306 and the rear cover 307 are mounted on opposite sides of the other folding case 305, respectively; one of the folding shells 305 accommodates the sounding unit 100 therein, and the first sound hole 301 is located at the top of the middle frame 308 corresponding to the folding shell 305, the second sound hole 302 is located at the mounting edge 309 corresponding to the folding shell 305, and the third sound hole 303 is located at the top or mounting edge 309 of the middle frame 308 corresponding to the folding shell 305.

In this embodiment, the electronic device 300 is a folding screen phone, the housing 304 of which includes two rectangular folding shells 305, the two folding shells 305 being foldable or foldable with respect to each other along the long sides of the housing 304. A screen 306 is installed on both front and rear sides of one of the folding cases 305, and the two screens 306 are a sub-screen 306b and a first screen 3061, respectively; a screen 306 and a rear cover 307 are respectively installed on the front and rear sides of the other folding case 305, and the screen 306 is a second screen 3062.

It will be appreciated that when the two folding shells 305 of the folding screen phone are folded over each other, the secondary screen 306b is exposed to the front side, the screen 306 may be referred to as secondary screen 306b, the first screen 3061 and the second screen 3062 are folded over on the inside, and the rear cover 307 is exposed to the rear side. When the two folding housings 305 of the folding screen mobile phone are unfolded from each other, the first screen 3061 and the second screen 3062 are disposed on the same side and constitute a main screen 306a, and the sub screen 306b is disposed on the same side as the rear cover 307.

In the two folding shells 305, a sounding unit 100 is accommodated in one folding shell 305, a first sound hole 301 is formed at the top of a middle frame 308 corresponding to the folding shell 305 to realize sounding of the first sounding unit 10, a second sound hole 302 is formed at a mounting edge 309 corresponding to the folding shell 305 to realize sounding of the second sounding unit 20, and the second sound hole 302 can be specifically located at the top of the secondary screen 306 b. The top or the mounting edge 309 of the middle frame 308 corresponding to the folded shell 305 is provided with a third sound hole 303, so as to realize sound emission of the third sound unit 30, the third sound hole 303 may be specifically located at the top of the middle frame 308 corresponding to the folded shell 305, and the third sound hole 303 and the first sound hole 301 may be sequentially arranged along the width direction of the folded shell 305 at the top of the middle frame 308 corresponding to the folded shell 305.

When a call is desired, the electronic device 300 may be in RCV mode and the two folding shells 305 may be in a folded state with respect to each other. When the sound is required to be played, the electronic device 300 can be in the SPK mode, and at this time, the two folding shells 305 can be in a mutually folded state or a mutually unfolded state, and the mutually unfolded state includes a position where any open included angle can be formed between the two folding shells 305, so that the use is flexible and convenient.

Further, the number of the sounding units 100 is plural, the sounding units 100 are separately disposed in the two folding shells 305, and the sounding units 100 disposed in the same folding shell 305 are disposed side by side along the width direction of the folding screen and share the first sound hole group.

The number of the sounding single bodies 100 can be flexibly set according to actual use requirements, sounding three-dimensional degree can be improved by setting a plurality of sounding single bodies 100, tone fullness and tone intensity are improved, and tone is optimized. In addition, the first sound generating units 10 of the plurality of sound generating units 100 positioned in the same folding shell 305 share the first sound hole 301, the second sound generating units 20 of the plurality of sound generating units 100 share the second sound hole 302, and the third sound generating units 30 of the plurality of sound generating units 100 share the third sound hole 303, so that the structure is simplified, and the appearance attractiveness of the electronic device 300 is not affected.

If all the sounding units 100 are accommodated in the same folding housing 305, the occupied volume is large, which is unfavorable for the design of lightening and miniaturization of the folding housing 305, so that the sounding units 100 are separated and arranged on two folding housings 305 in the embodiment, so as to ensure the design of lightening and miniaturization of the folding housing 305.

Further, a plurality of sound emitting cells 100 located in the same folding case 305 are arranged side by side in the width direction of the folding screen. As shown in fig. 15, the width direction of the folded case 305 is the left-right direction, the length direction of the folded case 305 is the up-down direction, and the thickness direction of the folded case 305 is the front-back direction.

Compared with the arrangement of the sounding units 100 side by side along the length direction of the folding shell 305, the arrangement of the sounding units 100 in the same folding shell 305 side by side along the width direction of the folding shell 305 in this embodiment can ensure that the sounding units 100 are located at positions close to the top of the folding shell 305, shorten the positions of the double-sided sounding unit 400 and the first sound hole group on the folding shell 305, and facilitate sounding.

Compared with the arrangement of the plurality of double-sided sounding units 400 side by side along the thickness direction of the folded casing 305, the arrangement of the plurality of sounding units 100 in the same folded casing 305 side by side along the width direction of the folded casing 305 can occupy too much space in the thickness direction of the folded casing 305, thereby realizing a light and thin design.

As shown in fig. 18, in one embodiment, when two folded shells 305 are folded, a first set of sound holes on one folded shell 305 is disposed opposite a first set of sound holes on the other folded shell 305.

Specifically, the two first sound holes 301 respectively arranged on the two folding shells 305 are opposite to each other, the two second sound holes 302 respectively arranged on the two folding shells 305 are opposite to each other and are opposite to each other, and the two third sound holes 303 respectively arranged on the two folding shells 305 are opposite to each other, so that collinear arrangement is realized, and the structural design is reasonable and simple.

In another embodiment, as shown in fig. 19, when two folded shells 305 are folded, the first sound hole group on one folded shell 305 is offset from the first sound hole group on the other folded shell 305. Specifically, the two first sound holes 301 respectively disposed on the two folding shells 305 are disposed in a staggered manner, the two second sound holes 302 respectively disposed on the two folding shells 305 are disposed in a staggered manner and are disposed in a opposite manner, and the two third sound holes 303 respectively disposed on the two folding shells 305 are disposed in a staggered manner, so that the structural design is flexible.

As shown in fig. 20, in yet another embodiment, the electronic device 300 further includes a double-sided sound generating unit 400, where the double-sided sound generating unit 400 is contained in another folding case 305, and the double-sided sound generating unit 400 includes a fourth sound generating unit 401 and a fifth sound generating unit 402 that are disposed opposite to each other; the folding shell 305 is provided with a second sound hole group, and the second sound hole group comprises a fourth sound hole 404 communicated with the fourth sound unit 401 and a fifth sound hole 405 communicated with the fifth sound unit 402; fourth sound hole 404 is located at the top of center 308 corresponding to folded shell 305 and fifth sound hole 405 is located at a position where corresponding mounting edge 309 of folded shell 305 is adjacent fourth sound hole 404.

In this embodiment, the sounding unit 100 is accommodated in one of the folded shells 305, and the double-sided sounding unit 400 is accommodated in the other folded shell 305, so that the structural design is reasonable. The diaphragm assembly of the fourth sound generating unit 401 is a fourth diaphragm assembly 4011, and the diaphragm assembly of the fifth sound generating unit 402 is a fifth diaphragm assembly 4021. The sound emitting direction of the fourth sound emitting unit 401 and the back-to-back arrangement of the fifth sound emitting unit 402 in the double-sided sound emitting unit 400, that is, the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 are arranged back-to-back. In one embodiment, the fourth diaphragm assembly 4011 sounds forward and the fifth diaphragm assembly 4021 sounds rearward.

The sound emitting area of the fourth diaphragm assembly 4011 and the sound emitting area of the fifth diaphragm assembly 4021 may be the same or different. In an embodiment, the sound emitting area of the fourth diaphragm assembly 4011 is the same as the sound emitting area of the fifth diaphragm assembly 4021. The folding shell 305 where the double-sided sound generating unit 400 is located is provided with a fourth sound hole 404 and a fifth sound hole 405, the fourth sound generating unit 401 generates sound through the fourth sound hole 404, and the fifth sound generating unit 402 generates sound through the fifth sound hole 405.

When a call is to be answered, the electronic device 300 can be in RCV mode, and the fourth sound generating unit 401 and the fifth sound generating unit 402 of the double-sided sound generating unit 400 vibrate in the same direction, that is, the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 vibrate in the same direction, so that sound waves with the same amplitude and opposite phases are generated, a dipole effect is formed, and the call privacy is improved. When the sound is required to be emitted, the electronic device 300 may be in the SPK mode, and the fourth sound generating unit 401 of the dual-sided sound generating unit 400 reversely vibrates, that is, the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 reversely vibrate, so that sound waves with the same phase are generated, and the sound waves emitted from the fourth sound hole 404 and the fifth sound hole 405 are overlapped with each other, so as to provide sufficient external sound volume and improve the sound quality performance.

In an embodiment, when the two folding shells 305 are folded, the first sound hole group and the second sound hole group are opposite to each other, so that collinear arrangement is realized, and the structural design is reasonable and simple.

In another embodiment, when the two folding shells 305 are folded, the first sound hole group and the second sound hole group are arranged in a staggered manner, and the structural design is flexible.

In an embodiment, the number of the double-sided sounding units 400 is plural, the double-sided sounding units 400 are separately disposed in two folding shells 305, and the double-sided sounding units 400 disposed in the same folding shell 305 are arranged side by side along the width direction of the folding screen and share the second sound hole group. Preferably, the number of the double-sided sound emitting units 400 accommodated in the two folding cases 305 is identical.

When a call is to be received, the electronic device 300 may be in RCV mode, and the two folding shells 305 may be in a mutually folded state, so that the two folding shells 305 are closer to each other, and the fourth sound generating unit 401 and the fifth sound generating unit 402 of each double-sided sound generating unit 400 in one folding shell 305 vibrate in the same direction, generate sound waves with the same amplitude and opposite phases, and generate sound through the fourth sound hole 404 and the fifth sound hole 405 on the folding shell 305 respectively. The fourth sound generating unit 401 and the fifth sound generating unit 402 of each double-sided sound generating unit 400 in the other folded casing 305 vibrate in the same direction, generate sound waves with the same amplitude and opposite phases, and generate sound through the fourth sound hole 404 and the fifth sound hole 405 on the folded casing 305, respectively. In addition, the sound waves emitted from the fourth sound hole 404 and the fifth sound hole 405 of one folding shell 305 and the sound waves emitted from the fourth sound hole 404 and the fifth sound hole 405 of the other folding shell 305 form a quadrupole effect in a far field, so that sound far field leakage is effectively reduced, conversation privacy is greatly improved, and a good privacy protection function is provided.

When the sound is required to be played, the electronic device 300 can be in the SPK mode, and the two folding shells 305 can be in a mutually folded state or a mutually unfolded state, wherein the mutually unfolded state comprises a position where any open included angle can be formed between the two folding shells 305, so that the electronic device is flexible and convenient to use. In the SPK mode, the fourth sound generating unit 401 and the fifth sound generating unit 402 of each double-sided sound generating unit 400 in one of the folded casings 305 vibrate reversely to generate sound waves with the same phase, and sound is generated through the fourth sound hole 404 and the fifth sound hole 405 on the folded casing 305 respectively; the fourth sound generating unit 401 and the fifth sound generating unit 402 of each double-sided sound generating unit 400 in the other folded casing 305 also vibrate reversely to generate sound waves with the same phase, and sound is generated through the third sound hole 303 and the fourth sound hole 404 on the folded casing 305, and the sound waves emitted from the fourth sound hole 404 and the fifth sound hole 405 of one folded casing 305 and the sound waves emitted from the fourth sound hole 404 and the fifth sound hole 405 of the other folded casing 305 are mutually overlapped to provide sufficient outward-discharge loudness and improve sound quality performance, and have sufficient outward-discharge loudness function and higher sound quality performance function.

Note that, the sound wave phase in the fourth sound hole 404 and the sound wave phase in the fifth sound hole 405 have opposite polarities, the fourth sound hole 404 on the folded shell 305 is shared by the plurality of fourth sound emitting units 401 having the same sound wave phase in the plurality of double-sided sound emitting units 400 in the same folded shell 305, and the fifth sound emitting unit 405 on the folded shell 305 is shared by the plurality of fifth sound emitting units 402 having the same phase.

A plurality of double-sided sound emitting units 400 located in the same folding case 305 are arranged side by side in the width direction of the folding screen.

Compared with the arrangement of the multiple double-sided sounding units 400 side by side along the length direction of the folding shell 305, the arrangement of the multiple double-sided sounding units 400 side by side along the width direction of the folding shell 305 in the same folding shell 305 in this embodiment can ensure that the multiple double-sided sounding units 400 are all located at positions close to the top of the folding shell 305, shorten the positions of the double-sided sounding units 400 and the third sound holes 303 on the folding shell 305, and facilitate sounding.

Compared with the arrangement of the plurality of double-sided sound emitting units 400 side by side along the thickness direction of the folded casing 305, the arrangement of the plurality of double-sided sound emitting units 400 side by side along the width direction of the folded casing 305 in the same folded casing 305 of the present embodiment can occupy too much space in the thickness direction of the folded casing 305, and thus a light and thin design is achieved.

In an embodiment, the double-sided sound generating unit 400 includes a fourth sound generating unit 401 and a fifth sound generating unit 402 that are independent from each other and are disposed opposite to each other; alternatively, the fourth sound emitting unit 401 is disposed side by side with the fifth sound emitting unit 402; the fourth sound emitting unit 401 and the fifth sound emitting unit 402 form two sound emitting surfaces 406 disposed opposite to each other, respectively.

If the thickness of the folded shell 305 is large, there is enough installation space in the thickness direction of the folded shell, the fourth sounding unit 401 and the fifth sounding unit 402 are independent from each other, and the positions of the fourth sounding unit 401 and the fifth sounding unit 402 can be flexibly set, only the fourth sounding unit 401 and the fifth sounding unit 402 are required to be arranged back to back, that is, the fourth vibrating diaphragm assembly 4011 of the fourth sounding unit 401 and the fifth vibrating diaphragm assembly 4021 of the fifth sounding unit 402 are required to be arranged back to back; if the thickness of the folded shell 305 is smaller, the fourth sound generating unit 401 and the fifth sound generating unit 402 may be disposed side by side, specifically, disposed side by side along the width direction of the folded shell 305. For example, the fourth sound generating unit 401 and the fifth sound generating unit 402 are arranged in a row and are arranged opposite to each other, the first side of the fourth sound generating unit 401 is arranged flush with the second side of the fifth sound generating unit 402, the second side of the fourth sound generating unit 401 is arranged flush with the first side of the fifth sound generating unit 402, the fourth diaphragm assembly 4011 of the fourth sound generating unit 401 is located on the first side of the fourth sound generating unit 401, and the fifth diaphragm assembly 4021 of the fifth sound generating unit 402 is located on the first side of the fifth sound generating unit 402.

As shown in fig. 21 to 23, in another embodiment, the double-sided sound generating unit 400 includes a fourth sound generating unit 401, a fifth sound generating unit 402 and a second magnetic circuit assembly 403, the fourth sound generating unit 401 includes a fourth diaphragm assembly 4011 and a fourth voice coil 4012, the fifth sound generating unit 402 includes a fifth diaphragm assembly 4021 and a fifth voice coil 4022, the second magnetic circuit assembly 403 is provided with a fourth magnetic gap 4031 and a fifth magnetic gap 4032, the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 are disposed back to back, one end of the fourth voice coil 4012 is connected with the fourth diaphragm assembly 4011, the other end of the fourth voice coil 4012 is inserted in the fourth magnetic gap 4031, one end of the fifth voice coil 4022 is connected with the fifth diaphragm assembly 4021, the other end of the fifth voice coil 4022 is inserted in the fifth magnetic gap 4032, and the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 form two sound generating surfaces 406, respectively, and the two sound generating surfaces 406 are disposed back to back.

Taking the folded case 305 on the front side in the folded state as an example, in the internal double-sided sound generating unit 400, the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021 are disposed back to back along the front-back direction, the second magnetic circuit assembly 403 is disposed between the fourth diaphragm assembly 4011 and the fifth diaphragm assembly 4021, the second magnetic circuit assembly 403 is provided with a fourth magnetic gap 4031 for inserting the rear end of the fourth voice coil 4012, so as to realize the front-back vibration of the fourth voice coil 4012 and the fourth diaphragm assembly 4011, and the second magnetic circuit assembly 403 is further provided with a fifth magnetic gap 4032 for inserting the front end of the fifth voice coil 4022, so as to realize the front-back vibration of the fifth voice coil 4022 and the fifth diaphragm assembly 4021. The second magnetic circuit assembly 403 of the present embodiment has the fourth magnetic gap 4031 and the fifth magnetic gap 4032, so that the fourth sound generating unit 401 and the fifth sound generating unit 402 share the second magnetic circuit assembly 403, simplifying the structure of the second magnetic circuit assembly 403 and having compact structure. In a preferred embodiment, the fourth magnetic gap 4031 and the fifth magnetic gap 4032 are disposed opposite and in communication with each other, further simplifying the structure of the second magnetic circuit assembly 403.

In yet another embodiment, the double-sided sounding unit 400 may be a DPS sounding unit, where the DPS sounding unit is compatible with a fourth sounding unit 401 and a fifth sounding unit 402, and the fourth sounding unit 401 and the fifth sounding unit 402 respectively form two sounding surfaces 406 disposed opposite to each other, so that the integration degree is high and the structure is compact.

In other embodiments, the housing 304 is a rectangular shell, the screen 306 and the rear cover 307 are respectively mounted on two opposite sides of the housing 304, and the number of the sounding units 100 is one or more; when the number of the sounding units 100 is plural, the sounding units 100 are arranged side by side along the width direction of the housing 304, and the sounding units 100 share the first sound hole group, or the housing 304 has a first sound hole group corresponding to each sounding unit 100.

In this embodiment, the electronic device 300 is a straight screen mobile phone, the housing of the electronic device is a rectangular shell, the screen 306 and the rear cover 307 are respectively mounted on the front side and the rear side of the housing, when the number of the sounding units 100 is one or more sounding units 100 sharing the first sounding hole group, the first sounding holes 301 of the first sounding hole group are located at the top of the middle frame 308, the second sounding holes 302 are located on the mounting edge 309, and the third sounding holes 303 are located at the top of the middle frame 308 or the mounting edge 309, so that the structural layout is reasonable.

The number of the sounding single bodies 100 can be flexibly set according to actual use requirements, sounding three-dimensional degree can be improved by setting a plurality of sounding single bodies 100, tone fullness and tone intensity are improved, and tone is optimized. The first sound emitting units 10 of the plurality of sound emitting units 100 share the first sound hole 301, the second sound emitting units 20 of the plurality of sound emitting units 100 share the second sound hole 302, and the third sound emitting units 30 of the plurality of sound emitting units 100 share the third sound hole 303, so that the structure is simplified, and the appearance aesthetic degree of the electronic device 300 is not affected.

The plurality of sounding units 100 are in one-to-one correspondence with a plurality of first sound hole groups, that is, the first sound hole groups corresponding to the plurality of sounding units 100 are independently arranged, and one sounding unit 100 is in correspondence with one first sound hole group, so that sounding stereo is further improved and tone is optimized. When the plurality of sounding units 100 are in one-to-one correspondence with the plurality of first sounding hole groups, the plurality of first sounding hole groups can be arranged side by side along the width direction of the housing 304 at intervals, and the structural design is reasonable. The width direction of the housing 304 is the left-right direction, the length direction of the housing 304 is the up-down direction, and the thickness direction of the housing 304 is the front-back direction.

The shapes and the constructions of the first sound hole 301, the second sound hole 302, the third sound hole 303, the fourth sound hole 404 and the fifth sound hole 405 can be flexibly set according to actual requirements.

As shown in fig. 26, in an embodiment, the first sound hole 301 is a racetrack hole, and the racetrack hole extends along the width direction of the housing 304, so as to realize an integrated design of the first sound hole 301, and is easy to manufacture. As shown in fig. 15 to 20, 24 and 25, in another embodiment, the first sound hole 301 includes a plurality of sound outlets distributed at intervals, specifically, the plurality of sound outlets are sequentially distributed at intervals along the width direction of the housing 304, so as to realize a split design of the first sound hole 301, which is flexible and convenient.

As shown in fig. 26, in an embodiment, the third acoustic hole 303 is a racetrack hole, and the racetrack hole extends along the width direction of the housing 304, so as to realize an integrated design of the third acoustic hole 303, and is easy to manufacture. In another embodiment, the third sound hole 303 includes a plurality of sound outlet holes that are distributed at intervals, specifically, the plurality of sound outlet holes are sequentially distributed at intervals along the width direction of the housing 304, so as to realize a split design of the third sound hole 303, which is flexible and convenient.

As shown in fig. 15 to 20, 24 and 25, in an embodiment, the second sound hole 302 may be a track hole, and the track hole extends along the width direction of the housing 304, so as to realize an integrated design of the second sound hole 302, and is easy to manufacture. In another embodiment, the second sound hole 302 includes a plurality of sound outlets that are distributed at intervals, specifically, the plurality of sound outlets are sequentially distributed at intervals along the width direction of the housing 304, so as to realize a split design of the second sound hole 302, which is flexible and convenient.

In an embodiment, the fourth acoustic port 404 may be a racetrack-shaped port, which extends along the width direction of the housing 304, so as to realize an integrated design of the fourth acoustic port 404, and is easy to manufacture. In another embodiment, the fourth sound hole 404 includes a plurality of sound outlets that are distributed at intervals, specifically, the plurality of sound outlets are sequentially distributed at intervals along the width direction of the housing 304, so as to realize a split design of the fourth sound hole 404, which is flexible and convenient.

In an embodiment, the fifth acoustic port 405 may be a racetrack-shaped port, which extends along the width direction of the housing 304, so as to realize an integrated design of the fifth acoustic port 405, and is easy to manufacture. In another embodiment, the fifth sound hole 405 includes a plurality of sound holes that are distributed at intervals, specifically, the plurality of sound holes are sequentially distributed at intervals along the width direction of the folded shell 305, so as to realize a split design of the fifth sound hole 405, which is flexible and convenient.

In a preferred embodiment, in the first sound hole group, the first sound hole 301 and the third sound hole 303 each include a plurality of sound outlets that are distributed at intervals, and the third sound hole 303 may be located at a middle position of the first sound hole 301, and the second sound hole 302 may be a racetrack hole. In the second sound hole set, the fourth sound hole 404 may be a racetrack hole, and the fifth sound hole 405 includes a plurality of sound outlets distributed at intervals.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims

1. An electronic device, the electronic device comprising:

2. The electronic device of claim 1, wherein the first diaphragm assembly and the second diaphragm assembly are disposed on two sides of the sounding unit along the first direction, the sounding unit further comprises a magnetic circuit assembly, the magnetic circuit assembly is disposed between the first diaphragm assembly and the second diaphragm assembly, the first sounding unit comprises a first voice coil, the second sounding unit comprises a second voice coil, the magnetic circuit assembly is provided with a first magnetic gap and a second magnetic gap, one end of the first voice coil is connected with the first diaphragm assembly, the other end of the first voice coil is inserted into the first magnetic gap, one end of the second voice coil is connected with the second diaphragm assembly, and the other end of the second voice coil is inserted into the second magnetic gap.

3. The electronic device of claim 2, wherein the magnetic circuit assembly comprises:

a first side magnet;

4. The electronic device of claim 3, wherein the third sound generating unit includes a third side magnet, a third magnetic gap is formed between the third side magnet and the first side magnet, the third sound generating unit includes a third voice coil, one end of the third voice coil is connected to the third diaphragm assembly, and the other end of the third voice coil is inserted into the third magnetic gap.

5. The electronic device of claim 4, wherein the third voice coil is a flat voice coil and an axis of the flat voice coil coincides with the first direction.

6. The electronic device of claim 5, wherein the third voice coil is provided with two extending edges spaced apart along the second direction, each extending along a third direction, the third directions being perpendicular to the first direction and the second direction, respectively, one of the extending edges being connected to the third diaphragm assembly and located outside the third magnetic gap, and the other extending edge being interposed in the third magnetic gap.

7. The electronic device of claim 4, wherein the sound generating unit further comprises a magnetic yoke and a magnetic conductive plate arranged at intervals along the first direction, the magnetic circuit assembly is located between the magnetic yoke and the magnetic conductive plate, the magnetic yoke comprises a body portion and a bending extension portion, the magnetic circuit assembly is arranged on the body portion, the bending extension portion is arranged at one end of the body portion and bends towards a direction away from the magnetic circuit assembly, the bending extension portion cooperates with the first side magnet to define a mounting groove, and the third side magnet is located in the mounting groove and is arranged at intervals with the first side magnet to form the third magnetic gap.

8. The electronic device of claim 7, wherein the magnetically permeable plate comprises a side magnetically permeable plate and a center magnetically permeable plate, the side of the first side magnet facing away from the magnetic yoke is connected to the side magnetically permeable plate, and the side of the ring magnet and the center magnet facing away from the magnetic yoke are both connected to the center magnetically permeable plate.

9. The electronic device of claim 3, wherein the sound generating unit further comprises a magnetic yoke and a magnetic conductive plate which are arranged at intervals along the first direction, the magnetic circuit assembly is located between the magnetic yoke and the magnetic conductive plate, the third sound generating unit comprises a central magnet, the magnetic yoke and the magnetic conductive plate are respectively arranged at two sides of the central magnet and form a third magnetic gap with the central magnet, the third sound generating unit comprises a third voice coil, one end of the third voice coil is connected with the third diaphragm assembly, and the other end of the third voice coil is inserted into the third magnetic gap.

10. The electronic device of claim 9, wherein the voice coil of the third sound generating unit is a cylindrical voice coil, and an axis of the cylindrical voice coil coincides with the second direction.

11. The electronic device of claim 1, wherein,

the first sound generating unit is provided with a first rear cavity, the second sound generating unit is provided with a second rear cavity, and the third sound generating unit is provided with a third rear cavity;

12. The electronic device of any of claims 1-11, wherein an outer edge of the housing forms a center, a side of the housing mounts a screen and a rear cover, a location on the housing between the center top and the screen top and/or between the center top and the rear cover top each form a mounting edge, the first sound hole is located at the center top, the second sound hole is located proximate to the first sound hole and at the mounting edge, and the third sound hole is located at the center top or the mounting edge.

13. The electronic device of claim 12, wherein the electronic device comprises a memory,

The shell comprises two rectangular folding shells which can be mutually folded or unfolded along the long sides of the shell, wherein the screen is arranged on two opposite sides of one folding shell, and the screen and the rear cover are respectively arranged on two opposite sides of the other folding shell;

14. The electronic device of claim 13, wherein the electronic device comprises a memory,

the number of the sounding monomers is multiple, the sounding monomers are arranged on the two folding shells respectively, and the sounding monomers in the same folding shell are arranged side by side along the width direction of the folding screen and share the first sound hole group.

15. The electronic device of claim 14, wherein the first set of acoustic holes on one of the folded shells is disposed directly opposite or offset from the first set of acoustic holes on the other folded shell when the two folded shells are folded.

16. The electronic device of claim 13, further comprising a double-sided sound emitting unit housed within the other folded housing, the double-sided sound emitting unit comprising a fourth sound emitting unit and a fifth sound emitting unit disposed opposite; the folding shell is provided with a second sound hole group, and the second sound hole group comprises a fourth sound hole communicated with the fourth sound unit and a fifth sound hole communicated with the fifth sound unit; the fourth sound hole is positioned at the top of the middle frame corresponding to the folding shell, and the fifth sound hole is positioned at the position, close to the fourth sound hole, of the mounting edge corresponding to the folding shell.

17. The electronic device of claim 16, wherein the first set of acoustic holes and the second set of acoustic holes are disposed directly opposite or offset from each other when the two folded shells are folded.

18. The electronic device of claim 16, wherein the number of the double-sided sound generating units is plural, the plural double-sided sound generating units are separately provided in two folding cases, and the plural double-sided sound generating units in the same folding case are arranged side by side along the width direction of the folding screen and share the second sound hole group.

19. The electronic device of claim 12, wherein the housing is a rectangular shell, the screen and the rear cover are respectively mounted on opposite sides of the housing, and the number of sound emitting monomers is one or more; when the number of the sounding monomers is multiple, the sounding monomers are arranged side by side along the width direction of the shell, and the sounding monomers share the first sound hole group, or the shell is provided with one first sound hole group corresponding to each sounding monomer.