Sound production monomer and electronic equipment

Abstract

The invention discloses a sound production monomer and electronic equipment, and relates to the technical field of acoustic-electric conversion, the sound production monomer comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnetic conductive yoke and three groups of magnetic circuit assemblies arranged on the magnetic conductive yoke at intervals along a first direction, and each magnetic circuit assembly extends along a second direction; a magnetic gap is formed between any two adjacent magnetic circuit assemblies; the vibration system comprises a vibrating diaphragm and a flat voice coil used for driving the vibrating diaphragm to vibrate along a third direction, and the axis of the flat voice coil is arranged along the first direction; the number of the flat voice coils is two, and the two flat voice coils are connected with the vibrating diaphragm and are respectively located in the corresponding magnetic gaps. The magnetic circuit system is divided into the three magnetic circuit assemblies and the two voice coils are arranged, the magnetic induction intensity B value is increased while the line length L value of the voice coils is increased, and therefore the electromechanical coupling coefficient BL value of the sound production single body is increased, the volume of the sound production single body is increased, and the problem that in the prior art, sound production single bodies are generally insufficient in volume is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sound-to-electric conversion, and in particular to a sound-generating unit and an electronic device. Background Art

[0002] In recent years, smart wearable devices have developed rapidly, especially smart watches, which are the most significant. Smart watches are also developing towards miniaturization and lightweight. Therefore, the requirements for micro speakers for smart watches are also biased towards small size, loud volume and good deep waterproof performance. The sandwich structure micro speakers in the existing technology have inherent advantages in deep waterproofness.

[0003] Although the sandwich structure micro-speaker in the prior art has good deep waterproof performance, due to structural limitations, the voice coil part of its sound unit is located outside the magnetic circuit, and the magnet utilization rate on both sides of the edge away from the voice coil is low, resulting in a low electromechanical coupling coefficient BL value of the sound unit, making the volume of the sound unit small, resulting in the common problem of insufficient volume in the sound units used in smart watches in the prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a sound-generating unit and an electronic device, aiming to solve the problems in the prior art of low magnetic circuit utilization and generally insufficient volume of the sound-generating unit.

[0005] To achieve the above-mentioned purpose, the sound-emitting unit proposed in the present invention comprises:

[0006] A magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and three groups of magnetic circuit components arranged on the magnetic yoke at intervals along a first direction, each of the magnetic circuit components extending along a second direction, and a magnetic gap formed between any two adjacent groups of the magnetic circuit components;

[0007] A vibration system, the vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along a third direction, the axis of the flat voice coil is arranged along the first direction, the first direction, the second direction and the third direction are perpendicular to each other; the number of the flat voice coils is two, the two flat voice coils are both connected to the diaphragm and are respectively located in the corresponding magnetic gaps.

[0008] In one embodiment, each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate, and a second magnet which are sequentially stacked along the third direction, and the first magnetic conductive plate is located on a side close to the diaphragm.

[0009] In one embodiment, each of the flat voice coils includes two long sides and two short sides, and the two ends of the two long sides are respectively connected by two short sides to form a ring-shaped flat voice coil, wherein one of the long sides is arranged corresponding to the first magnetic conductive plate, and the other long side is arranged corresponding to the second magnetic conductive plate.

[0010] In one embodiment, both ends of each of the long sides along the second direction extend out of the magnetic gap.

[0011] In one embodiment, the sound-emitting unit further includes:

[0012] A housing, wherein the magnetic circuit system is installed in the housing, and the outer side of the diaphragm is connected to the housing;

[0013] Two support plates are respectively arranged at two ends of the flat voice coil along the second direction and located outside the magnetic circuit system. One end of the support plate is connected to the shell, and the other end is connected to the two flat voice coils.

[0014] In one embodiment, the support piece includes an inner fixing portion, an elastic arm portion and an outer fixing portion connected in sequence, the outer fixing portion is connected to the shell, the inner fixing portion is connected to the two flat voice coils, and the elastic arm portion is bent and extended around the inner fixing portion.

[0015] In one embodiment, the outer fixing portion of each support sheet is provided with an outer pad for electrically connecting to an external circuit;

[0016] And / or, two inner pads are disposed on the inner fixing portion of each support plate, and the two inner pads are respectively connected to the leads of two adjacent flat voice coils.

[0017] In one embodiment, a bracket is mounted on each of the inner fixing parts, and the bracket connects each of the flat voice coils and the diaphragm.

[0018] In one embodiment, the bracket includes two support blocks spaced apart along the first direction, and the support blocks connect the inner fixing portion and the corresponding flat voice coil and diaphragm.

[0019] In one embodiment, each of the support blocks includes a connected mounting ear, a connecting plate and a connecting ear, wherein the mounting ear is arranged at one end of the connecting plate facing the inner fixing portion and is used to connect the inner fixing portion, the connecting ear is arranged at one end of the connecting plate facing the diaphragm and is used to connect the diaphragm, and the connecting plate is connected to the side of the corresponding flat voice coil.

[0020] In one embodiment, two avoidance holes are provided on both sides of the shell along the first direction, and the two avoidance holes are respectively used to avoid the two magnetic circuit components located at the outermost sides along the first direction.

[0021] The present invention further provides an electronic device, comprising a housing and the above-mentioned sound-emitting unit, wherein the sound-emitting unit is arranged in the housing.

[0022] The technical solution of the present invention is to divide the magnetic circuit system into three groups of magnetic circuit components, and form a magnetic gap between any two adjacent groups of magnetic circuit components, thereby forming two magnetic gaps. A flat voice coil is arranged in each magnetic gap. After power is turned on, the flat voice coil cuts the magnetic flux lines to produce longitudinal reciprocating motion, drives the diaphragm to produce displacement, promotes the vibration of air molecules, and then produces sound; by dividing the magnetic circuit system into three magnetic circuit components and arranging two flat voice coils, on the one hand, the two voice coils are arranged in the magnetic gap, which can increase the line length L value of the voice coil in the magnetic gap, and on the other hand, the distance between the three magnetic circuit components and the voice coil is not far, so that the utilization rate of the three magnetic circuit components is improved, and the two voice coils can make full use of the magnetic field of the three magnetic circuit components to improve the magnetic induction intensity B value, thereby increasing the BL value of the sound unit, and then increasing the volume of the sound unit, solving the problem of insufficient volume of the sound unit used in smart watches in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic cross-sectional view of a sound-emitting unit according to an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the explosion structure of a sound-generating unit provided by an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a sound-emitting unit provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of assembling a flat voice coil, a support plate and a bracket of a sound-emitting unit provided in one embodiment of the present invention;

[0028] Figure 5 A schematic diagram of the structure of a support plate and a bracket of a sound unit provided in one embodiment of the present invention.

[0029] Description of Figure Numbers:

[0030] 100. Sound unit; 1. Magnetic circuit system; 11. Magnetic yoke; 12. Magnetic circuit assembly; 121. First magnetic plate; 122. First magnet; 123. Second magnetic plate; 124. Second magnet; 13. Magnetic gap; 2. Vibration system; 21. Diaphragm; 22. Flat voice coil; 221. Long side; 222. Short side; 3. Shell; 31. Avoidance hole; 4. Support piece; 41. Internal fixing part; 42. Elastic arm part; 43. External fixing part; 44. External pad; 45. Internal pad; 46. Bracket; 47. Support block; 471. Mounting ear; 472. Connecting plate; 473. Connecting ear.

[0031] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Although the sandwich structure micro-speaker in the prior art has good deep waterproof performance, due to structural limitations, the voice coil part of its sound unit is located outside the magnetic circuit, and the magnet utilization rate on both sides of the edge away from the voice coil is low, resulting in a low BL value of the electromechanical coupling coefficient of the sound unit, making the volume of the sound unit small, resulting in the problem of insufficient volume in the sound units used in smart watches in the prior art.

[0036] Please combine Figure 1 and Figure 2 In order to solve the above problems, the present invention proposes a sound-emitting unit 100, including a magnetic circuit system 1 and a vibration system 2, the magnetic circuit system 1 includes a magnetic yoke 11 and three groups of magnetic circuit components 12 arranged on the magnetic yoke 11 along a first direction, each magnetic circuit component 12 extends along a second direction, and a magnetic gap 13 is formed between any two adjacent groups of magnetic circuit components 12; the vibration system 2 includes a diaphragm 21 and a flat voice coil 22 for driving the diaphragm 21 to vibrate along a third direction, the axis of the flat voice coil 22 is arranged along the first direction, and the first direction, the second direction and the third direction are perpendicular to each other; the number of the flat voice coils 22 is two, and the two flat voice coils 22 are both connected to the diaphragm 21 and are respectively located in the corresponding magnetic gaps 13.

[0037] It should be noted that the widths of the three groups of magnetic circuit assemblies 12 are close to each other, so that the distance between each group of magnetic circuit assemblies 12 and the flat voice coil 22 is not too far, so that each part of each group of magnetic circuit assemblies 12 can be fully utilized, thereby further improving the magnetic induction intensity B value of the sound unit 100 and increasing the volume of the sound unit 100. At the same time, if the width of the sound unit 100 is sufficient, the number of magnetic circuit assemblies 12 can be further increased. The magnetic circuit assemblies 12 are not limited to three groups, and the number of flat voice coils 22 is the number of magnetic circuit assemblies 12 minus one.

[0038] The technical solution of the present invention is to divide the magnetic circuit system 1 into three groups of magnetic circuit components 12, and form a magnetic gap 13 between any two adjacent groups of magnetic circuit components 12, thereby forming two magnetic gaps 13, and a flat voice coil 22 is arranged in each magnetic gap 13. After power is turned on, the flat voice coil 22 cuts the magnetic flux lines to produce longitudinal reciprocating motion, drives the diaphragm 21 to produce displacement, promotes the vibration of air molecules, and then produces sound; by dividing the magnetic circuit system 1 into three magnetic circuit components 12 and arranging two flat voice coils 22, on the one hand, the two voice coils can increase the line length L value of the voice coil, and on the other hand, the distance between the three magnetic circuit components 12 and the voice coil is not far, so that the utilization rate of the three magnetic circuit components 12 is improved, and the two voice coils can make full use of the magnetic field of the three magnetic circuit components 12, improve the magnetic induction intensity B value, thereby increasing the BL value of the sound unit 100, and then increasing the volume of the sound unit 100, solving the problem of insufficient volume of the sound unit 100 used in smart watches in the prior art.

[0039] In one embodiment, each magnetic circuit component 12 includes a first magnetic conductive plate 121, a first magnet 122, a second magnetic conductive plate 123, and a second magnet 124 which are sequentially stacked along the third direction, and the first magnetic conductive plate 121 is located on a side close to the diaphragm 21. The first magnetic conductive plate 121 and the second magnetic conductive plate 123 are arranged at intervals, so that the first magnetic conductive plate 121 concentrates the magnetic flux of the first magnet 122 at the first magnetic conductive plate 121, and the second magnetic conductive plate 123 concentrates the magnetic flux of the second magnet 124 at the second magnetic conductive plate 123, forming two spaced and concentrated magnetic fields, and the flat voice coil 22 of the present application is vertically suspended in the magnetic gap 13, and has two sides that are opposite and spaced, corresponding to the two concentrated magnetic fields, which can improve the efficiency of the flat voice coil 22 in cutting the magnetic field, thereby further improving the magnetic induction intensity B value.

[0040] Please combine Figure 2 and Figure 4 In one embodiment, each flat voice coil 22 includes two long sides 221 and two short sides 222. The two ends of the two long sides 221 are connected by two short sides 222 to form a ring-shaped flat voice coil 22. One of the long sides 221 is arranged corresponding to the first magnetic conductive plate 121, and the other long side 221 is arranged corresponding to the second magnetic conductive plate 123. The two long sides 221 are used to cut the magnetic flux lines, thereby increasing the linear length L value of the flat voice coil 22 in the magnetic gap 13. At the same time, the long sides 221 are arranged corresponding to the first magnetic conductive plate 121 and the second magnetic conductive plate 123, respectively, so that each long side 221 can face the magnetic field formed by the first magnetic conductive plate 121 and the second magnetic conductive plate 123 to aggregate the magnetic flux lines, thereby increasing the magnetic induction intensity B value, thereby increasing the BL value of the sound unit 100 and increasing the volume of the sound unit 100.

[0041] It should be noted that the connection between the long side 221 and the short side 222 of the flat voice coil 22 can be rounded, so that the stress dispersion is more uniform, avoiding long-term stress concentration at the connection between the long side 221 and the short side 222 causing damage, and extending the service life of the flat voice coil 22.

[0042] Further, both ends of each long side 221 along the second direction extend outside the magnetic gap 13. The long sides 221 extend outside the magnetic gap 13, so that the effective line length of each long side 221 in the magnetic gap 13 is equal to the length of the magnetic gap 13, thereby maximizing the line length L value of the flat voice coil 22, and at the same time, the part of the long side 221 located outside the magnetic gap 13 is connected to other structures, does not interfere with the movement of the part located in the magnetic gap 13, and improves the stability of the flat voice coil 22.

[0043] Please combine Figure 2 , Figure 4 and Figure 5In one embodiment, the sound unit 100 also includes a bracket 46, which connects the diaphragm 21 and each flat voice coil 22. The flat voice coil 22 and the diaphragm 21 are connected by the bracket 46, which improves the connection stability between the flat voice coil 22 and the diaphragm 21. At the same time, the position of the flat voice coil 22 in the magnetic gap 13 can be adjusted by adjusting the shape of the bracket 46, which is convenient for operation.

[0044] In one embodiment, the sound unit 100 also includes a shell 3 and two supports 4. The magnetic circuit system 1 is installed in the shell 3, and the outer side of the diaphragm 21 is connected to the shell 3; the two supports 4 are respectively arranged at the two ends of the flat voice coil 22 along the second direction and are located on the outer side of the magnetic circuit system 1. One end of the support 4 is connected to the shell 3, and the other end is connected to the two flat voice coils 22.

[0045] The support plate 4 is connected to the housing 3 and the two flat voice coils 22 respectively, ensuring that the flat voice coils 22 always move in the second direction, reducing the risk of polarization of the flat voice coils 22. It should be noted that the support plate 4 has a conductive path for conducting external current to the flat voice coils 22.

[0046] Furthermore, the support piece 4 includes an inner fixing portion 41, an elastic arm portion 42 and an outer fixing portion 43 connected in sequence, the outer fixing portion 43 is connected to the housing 3, the inner fixing portion 41 is connected to the two flat voice coils 22, and the elastic arm portion 42 is bent and extended around the inner fixing portion 41. The elastic arm portion 42 is bent and extended around the inner fixing portion 41, which can increase the length of the elastic arm portion 42, thereby improving the elasticity of the elastic arm portion 42 and improving the response speed and transient performance of the sound unit 100. On the other hand, the overall occupied volume of the support piece 4 is reduced on the basis of ensuring the length of the elastic arm portion 42, thereby reducing the overall volume of the sound unit 100.

[0047] In one embodiment, an external pad 44 for electrically connecting to an external circuit is provided on the external fixing portion 43 of each support 4; in another embodiment, two internal pads 45 are provided on the internal fixing portion 41 of each support 4, and the two internal pads 45 are respectively connected to the leads of two adjacent flat voice coils 22. The external pad 44 is electrically connected to the external circuit, and then the internal pad 45 is directly connected to the adjacent flat voice coil 22, which can reduce the lead length and optimize the line structure, thereby reducing interference and loss during signal transmission, and can also reduce the overall volume of the sound unit 100.

[0048] In one embodiment, the sound unit 100 further includes a bracket 46, which is used to connect each flat voice coil 22, the diaphragm 21 and the support 4. Specifically, a bracket 46 is installed on each inner fixing portion 41, and the bracket 46 connects each flat voice coil 22 and the diaphragm 21. The bracket 46 is installed on the inner fixing portion 41 and connects the flat voice coil 22 and the diaphragm 21 at the same time, so that the components of the sound unit 100 are more compact, which facilitates reducing the size of the sound unit 100.

[0049] Furthermore, the bracket 46 includes two support blocks 47 spaced apart along the first direction, and the support blocks 47 connect the inner fixing portion 41 and the corresponding flat voice coil 22 and diaphragm 21. The inner fixing portion 41, the flat voice coil 22 and the diaphragm 21 are connected together by the support blocks 47, thereby improving the connection stability of the flat voice coil 22, the diaphragm 21, the inner fixing portion 41 and the bracket 46.

[0050] Specifically, each support block 47 includes a connected mounting ear 471, a connecting plate 472 and a connecting ear 473. The mounting ear 471 is arranged at one end of the connecting plate 472 facing the inner fixing part 41 and is used to connect the inner fixing part 41. The connecting ear 473 is arranged at one end of the connecting plate 472 facing the diaphragm 21 and is used to connect the diaphragm 21. The connecting plate 472 is connected to the side of the corresponding flat voice coil 22.

[0051] The mounting ear 471 is connected to the inner fixing part 41 to increase the contact area with the inner fixing part 41, the connecting ear 473 is connected to the diaphragm 21 to increase the contact area with the diaphragm 21, and the connecting plate 472 is connected to the side of the corresponding flat voice coil 22 to increase the contact area with the flat voice coil 22, thereby further improving the stability among the diaphragm 21, the supporting block 47, the inner fixing part 41 and the flat voice coil 22, and avoiding the support block 47 from being separated from the diaphragm 21, the flat voice coil 22 or the inner fixing part 41 during vibration.

[0052] In one embodiment, two avoidance holes 31 are provided on both sides of the housing 3 along the first direction, and the two avoidance holes 31 are respectively used to avoid the two outermost magnetic circuit components 12 along the first direction. The arrangement of the avoidance holes 31 can make the overall width of the magnetic circuit system 1 consistent with the width of the housing, increase the width of the magnetic circuit system 1, make the volume of the magnetic circuit component 12 larger, increase the magnetic induction intensity, and at the same time reduce the overall volume of the sound-emitting unit 100 when the volume of the magnetic circuit system 1 is relatively large.

[0053] In one embodiment, the sound unit 100 further includes a front cover disposed on the side of the housing 3 away from the magnetic circuit system 1, and the front cover is provided with a sound outlet for radiating the sound waves of the diaphragm 21 to the outside. It should be noted that the front cover is made of metal.

[0054] In one embodiment, the sound unit 100 further includes a waterproof sealing ring arranged around the shell 3. When the sound unit 100 is installed in the speaker electronic device, the waterproof sealing ring is compressed and deformed, thereby improving the waterproof capability of the electronic device. Optionally, the waterproof sealing ring, the diaphragm 21 and the shell 3 are integrally injection molded to improve the reliability of the connection between the three and further improve the waterproof capability of the electronic device.

[0055] The present invention also provides an electronic device, which includes a housing and the above-mentioned sound-emitting unit 100, wherein the sound-emitting unit 100 is arranged in the housing. The specific structure of the sound-emitting unit 100 refers to the above-mentioned embodiment. Since the electronic device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0056] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A sound-emitting unit, characterized in that: include: A magnetic circuit system, the magnetic circuit system comprising a magnetic yoke and three groups of magnetic circuit components arranged on the magnetic yoke at intervals along a first direction, each of the magnetic circuit components extending along a second direction, and a magnetic gap formed between any two adjacent groups of the magnetic circuit components; A vibration system, the vibration system comprising a diaphragm and a flat voice coil for driving the diaphragm to vibrate along a third direction, the axis of the flat voice coil is arranged along the first direction, the first direction, the second direction and the third direction are perpendicular to each other; the number of the flat voice coils is two, the two flat voice coils are both connected to the diaphragm and are respectively located in the corresponding magnetic gaps.

2. The sound-emitting unit according to claim 1, characterized in that: Each of the magnetic circuit components includes a first magnetic conductive plate, a first magnet, a second magnetic conductive plate and a second magnet which are sequentially stacked along the third direction, and the first magnetic conductive plate is located on a side close to the diaphragm.

3. The sound-emitting unit according to claim 2, characterized in that: Each of the flat voice coils includes two long sides and two short sides, and the two ends of the two long sides are respectively connected by two short sides to form a ring-shaped flat voice coil, wherein one of the long sides is arranged corresponding to the first magnetic conductive plate, and the other long side is arranged corresponding to the second magnetic conductive plate.

4. The sound-emitting unit according to claim 3, characterized in that: Both ends of each of the long sides along the second direction extend out of the magnetic gap.

5. The sound-emitting unit according to any one of claims 1 to 4, characterized in that: The sound-emitting monomer further comprises: A housing, wherein the magnetic circuit system is installed in the housing, and the outer side of the diaphragm is connected to the housing; Two support plates are respectively arranged at two ends of the flat voice coil along the second direction and located outside the magnetic circuit system. One end of the support plate is connected to the shell, and the other end is connected to the two flat voice coils.

6. The sound-emitting unit according to claim 5, characterized in that: The support piece includes an inner fixing portion, an elastic arm portion and an outer fixing portion which are connected in sequence, the outer fixing portion is connected to the housing, the inner fixing portion is connected to the two flat voice coils, and the elastic arm portion is bent and extended around the inner fixing portion.

7. The sound-emitting unit according to claim 6, characterized in that: The outer fixing portion of each support sheet is provided with an outer pad for electrically connecting to an external circuit; And / or, two inner pads are disposed on the inner fixing portion of each support plate, and the two inner pads are respectively connected to the leads of two adjacent flat voice coils.

8. The sound-emitting unit according to claim 6, characterized in that: A bracket is installed on each of the inner fixing parts, and the bracket connects each of the flat voice coils and the diaphragm.

9. The sound-emitting unit according to claim 8, characterized in that: The bracket includes two support blocks spaced apart along the first direction, and the support blocks connect the inner fixing portion and the corresponding flat voice coil and diaphragm.

10. The sound-emitting unit according to claim 9, characterized in that: Each of the support blocks includes a connected mounting ear, a connecting plate and a connecting ear. The mounting ear is arranged at one end of the connecting plate facing the inner fixing part and is used to connect the inner fixing part. The connecting ear is arranged at one end of the connecting plate facing the diaphragm and is used to connect the diaphragm. The connecting plate is connected to the side of the corresponding flat voice coil.

11. The sound-emitting unit according to claim 5, characterized in that: Two avoidance holes are provided on both sides of the shell along the first direction, and the two avoidance holes are respectively used to avoid the two magnetic circuit components located at the outermost sides along the first direction.

12. An electronic device, characterized in that: The electronic device comprises a housing and a sound-emitting unit as claimed in any one of claims 1 to 11, wherein the sound-emitting unit is arranged in the housing.

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