CN215453259U

CN215453259U - Sound production device for electronic device and electronic device

Info

Publication number: CN215453259U
Application number: CN202122090142.XU
Authority: CN
Inventors: 曹明君; 李波波
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-01-07
Anticipated expiration: 2031-08-31

Abstract

The utility model discloses a sound production device for an electronic device and the electronic device, which comprise a shell, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate along a first direction; at least one of the two magnetic members is magnetized in the circumferential direction, at least a part of the magnetic induction lines in the magnetic member magnetized in the circumferential direction extend toward the direction close to the magnetic gap, and the magnetic induction lines and the magnetic induction line of the other magnetic member form a closed magnetic induction line to pass through the voice coil in the second direction. The utility model can effectively improve the sensitivity of the loudspeaker, reduce the BOM number, reduce the distortion of the sound production device, particularly the low-frequency distortion, and improve the tone quality of the sound production device on the premise of not increasing the appearance size of the sound production device and not changing the internal structure design.

Description

Sound production device for electronic device and electronic device

Technical Field

The present invention relates to the field of acoustic devices, and particularly to a sound generating device for an electronic device and an electronic device.

Background

Sound producing devices, such as micro-speakers, are widely used in electronic devices, such as modern portable devices, communication devices, and intelligent devices, due to their small size, and users increasingly demand high sound quality of speakers.

The loudness (sensitivity) is a main index of the speaker, and the driving force factor BL value (the length L of a certain number of turns of wire multiplied by the magnetic flux density B per unit area) is a key factor affecting the sensitivity of the speaker. In the magnetic circuit design of the existing loudspeaker, the magnetic flux density of the region where the central washer and the side washers in the magnetic gap are opposite is the largest, but due to the limitation of the vibration space in the loudspeaker, the position of the voice coil in the magnetic gap cannot be freely adjusted, most of the structure of the voice coil is located outside the region where the magnetic induction lines are dense, the driving force factor BL value is not high, the sensitivity of the loudspeaker is affected, and the tone quality of the loudspeaker is poor. Meanwhile, magnetic flux density in the magnetic gap is not uniformly distributed, BL curve symmetry is poor, driving force is unbalanced when the voice coil vibrates up and down, loudspeaker distortion is high, especially low-frequency distortion is high, and acoustic performance of the loudspeaker is affected. In addition, the micro loudspeaker is small in size and high in assembly difficulty, and if automatic assembly is used, equipment and tooling cost is increased along with the increase of the number of BOMs, and production cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a sound production device for an electronic device and the electronic device, and aims to solve the problems of large BOM number, high distortion and poor sound quality of the sound production device in the prior art.

In order to achieve the above object, the present invention provides a sound generating device for an electronic device, including a housing, a vibration system and a magnetic circuit system, where the vibration system includes a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate along a first direction, the magnetic circuit system includes two magnetic parts oppositely arranged at intervals along a second direction to form a magnetic gap, the second direction is perpendicular to the first direction, a plane where the voice coil is located is perpendicular to a plane where the vibrating diaphragm is located, and the voice coil is suspended in the magnetic gap; at least one of the two magnetic pieces is magnetized along the circumferential direction, at least one part of magnetic induction lines in the magnetic pieces magnetized along the circumferential direction extend towards the direction close to the magnetic gap, and the magnetic induction lines of the other magnetic piece form closed magnetic induction lines to penetrate through the voice coil along the second direction.

Preferably, the two magnetic members are magnets, and each magnet is magnetized in the circumferential direction.

Preferably, one of the magnetic members is a magnet, the magnet is magnetized in the circumferential direction, and the other magnetic member is a magnetic conductive plate.

Preferably, a magnetic induction line distribution plane formed by the magnetic member magnetized in the circumferential direction is parallel to the first direction.

Preferably, the voice coil is in a flat ring structure, the voice coil has two flat sections which are arranged at intervals and have opposite current directions, the flat sections extend along the length direction of the magnetic member, and the closed magnetic induction line passes through at least one of the flat sections along the second direction.

Preferably, the vibration system further comprises a support, one side of the support is connected with the diaphragm, and the other side of the support is connected with one side of the voice coil extending out of the magnetic gap.

Preferably, the diaphragm includes a diaphragm body and a reinforcing portion connected to the diaphragm body, and one side of the support is connected to the reinforcing portion.

Preferably, the reinforcing part is provided with a protruding structure, the protruding structure is formed by protruding from the reinforcing part to the direction of the bracket, and the protruding structure is connected with the bracket.

Preferably, the number of the protruding structures is two, the two protruding structures are respectively and correspondingly arranged at two ends of the reinforcing part, and the number of the supports is consistent with that of the protruding structures and is connected in a one-to-one correspondence manner.

Preferably, the casing includes a first sub-casing, a second sub-casing and a cover plate, the first sub-casing and the cover plate are respectively and correspondingly connected to two sides of the second sub-casing, the magnetic circuit system is located in the second casing and mounted on the cover plate, the diaphragm is located in the first sub-casing, and the second sub-casing is provided with a through hole for the voice coil to pass through.

The utility model also provides an electronic device which comprises a shell and the sounding device which is accommodated in the shell and is used for the electronic device.

Compared with the magnetic circuit design of the existing sounding device, the magnetizing direction of the magnetic part is set to be the circumferential direction, so that the magnetic induction lines are distributed along the circumferential direction, the magnetic flux density and uniformity in a magnetic gap are improved, the whole voice coil can be positioned in a region with dense magnetic induction lines, the driving force factor BL is increased, the symmetry of a BL curve can be improved by adjusting the magnetizing circle center of the magnetic part, the distortion, particularly the low-frequency distortion of the sounding device is effectively reduced, the sensitivity of the sounding device is improved, and the tone quality of the sounding device is improved on the premise of not increasing the appearance size of the sounding device and not changing the internal structure design. In addition, because the magnetic part adopts a mode of magnetizing along the circumferential direction, and a magnetic induction line formed by the magnetic part can extend towards the direction close to the magnetic gap, the sound production device can also omit a central washer and a side washer structure in the traditional magnetic circuit design, so that the structure of a magnetic circuit system is simpler, the BOM number of products is reduced, and the production cost is further reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is an exploded view of a sound device according to a first embodiment of the present invention;

FIG. 2 is a schematic top view of the sound device according to the first embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a sound device according to a first embodiment of the present invention;

FIG. 4 is a schematic top view of a magnetic circuit system and a voice coil of a sound generating device according to a first embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a magnetic circuit system and a voice coil of a sound generating device according to a first embodiment of the present invention;

FIG. 6 is a BL curve simulation comparison graph of a circumferential magnetization mode and a parallel magnetization mode of a magnet in a sound generating device;

FIG. 7 is a comparison graph of BL curves before and after the magnet adjusts the magnetizing center in the sound generating device;

FIG. 8 is a magnetic induction line distribution diagram of a sound producing device according to an embodiment of the present invention;

FIG. 9 is an exploded view of a magnetic circuit system and a voice coil of a sound generating device according to a second embodiment of the present invention;

FIG. 10 is a schematic top view of a magnetic circuit system and a voice coil of a sound generating device according to a second embodiment of the present invention;

fig. 11 is a schematic cross-sectional view of a magnetic circuit system and a voice coil in a sound generating device according to a second embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound production device	213	Bump structure
10	Shell body	22	Voice coil
				11	First sub-housing	221	Straight section
12	Second sub-housing	23	Support frame
				121	Through hole	30	Magnetic circuit system
13	Cover plate	31	Magnet
				20	Vibration system	32	Magnetic gap
21	Vibrating diaphragm	33	Magnetic conductive plate
				211	Vibrating diaphragm body	34	Magnetic member
212	Reinforcing part

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The description of the orientations of "up", "down", "left", "right", "front", "back", etc. in the present invention, with reference to the orientation shown in fig. 1, is merely used to explain the relative positional relationship between the components in the attitude shown in fig. 1, and if the particular attitude is changed, the directional indication is changed accordingly.

The utility model provides a sounding device 100.

The sound device 100 is used in an electronic device, and the sound device 100 may be a speaker. As shown in fig. 1 to 11, the sound generating device 100 includes a housing 10, a vibration system 20 and a magnetic circuit system 30, wherein the vibration system 20 includes a diaphragm 21 and a voice coil 22 for driving the diaphragm 21 to vibrate in a first direction. As shown in fig. 1 to 5, in an embodiment, the magnetic circuit system 30 includes two magnetic members 34 spaced apart from each other in a second direction, the two magnetic members 34 forming a magnetic gap 32 therebetween, and the first direction is perpendicular to the second direction. The plane of the voice coil 22 is vertical to the plane of the diaphragm 21, and the voice coil 22 is suspended in the magnetic gap 32; at least one of the two magnetic members 34 is magnetized in a circumferential direction, and at least a portion of the magnetic induction lines in the magnetic member 34 magnetized in the circumferential direction extend toward a direction close to the magnetic gap 32 and form closed magnetic induction lines with the magnetic induction lines in the other magnetic member 34 to pass through the voice coil 22 in the second direction.

In an embodiment of the present invention, the first direction is a vertical direction as shown in fig. 1, and the vertical direction is a vertical direction, and the second direction is a horizontal direction as shown in fig. 1. The magnetic circuit system 30 includes two magnetic members 34, the two magnetic members 34 are disposed opposite to each other in the left-right direction, a magnetic gap 32 is formed between the two magnetic members 34, the voice coil 22 is disposed along the first direction, that is, the voice coil 22 is vertically disposed, the voice coil 22 is suspended in the magnetic gap 32, and the magnetic gap 32 between the two magnetic members 34 generates a magnetic field. The plane where the diaphragm 21 is located is a horizontal plane, the plane where the voice coil 22 is located is a vertical plane, and the two planes are perpendicular to each other, so that the voice coil 22 performs reciprocating cutting magnetic induction line motion at the magnetic gap 32 to drive the diaphragm 21 to vibrate up and down, thereby driving air to sound and completing energy conversion between electric sound.

In the first embodiment, both of the magnetic members 34 are the magnets 31, each magnet 31 is magnetized in the circumferential direction, at least a part of the magnetic induction lines in each magnet 31 extend toward the direction close to the magnetic gap 32, and are formed as closed magnetic induction lines with the magnetic induction lines in the other magnet 31 to pass through the voice coil 22 in the second direction, as shown in fig. 8, where the black lines in fig. 8 indicate the magnetic induction lines, and the arrows indicate the magnetizing direction. It is to be understood that, as shown in fig. 3 and 5, each magnet 31 is magnetized in the circumferential direction with its magnetic induction lines distributed in the circumferential direction, and the dotted arrows in fig. 3 and 5 indicate the magnetizing direction.

In the first embodiment, at least a part of the magnetic induction lines in each magnet 31 extend toward the direction close to the magnetic gap 32 and form closed magnetic induction lines with the magnetic induction lines in the other magnet 31, which can pass through the voice coil 22 in the second direction, which is, understandably, a horizontal direction, which can pass through the voice coil 22 in the horizontal direction to cut the magnetic induction lines when the voice coil 22 is vibrated up and down reciprocally.

As shown in fig. 9 and 11, in the second embodiment, in the magnetic circuit system 30, one of the magnetic members 34 is a magnet 31, the magnet 31 is magnetized in the circumferential direction, and the other magnetic member 34 is a magnetic conductive plate 33. In the second embodiment, the magnet 31 is magnetized in the circumferential direction, and at least a part of the magnetic induction lines in the magnet 31 extend toward the direction close to the magnetic gap 32 and are guided by the magnetic conductive plate 33 to be formed to close the magnetic induction lines to pass through the voice coil 22 in the second direction. It is to be understood that, as shown in fig. 11, magnet 31 is magnetized in the circumferential direction, and the magnetic induction lines thereof are distributed in the circumferential direction, and the dotted arrows in fig. 11 indicate the magnetizing direction. The magnetic conductive plate 33 has magnetic conductivity, and can be made of a magnetic conductive material such as SPCC or SUS430, and can guide and correct the magnetic induction line direction of the magnet 31.

In the second embodiment, at least a part of the magnetic induction lines in the magnet 31 extend toward the direction close to the magnetic gap 32 and are guided by the magnetic conductive plate 33 to be formed as closed magnetic induction lines that can pass through the voice coil 22 in the second direction, which is, understandably, a horizontal direction that can pass through the voice coil 22 in the horizontal direction to cut the magnetic induction lines when the voice coil 22 vibrates reciprocally up and down.

Compared with the first embodiment, the second embodiment replaces one of the magnets 31 in the first embodiment with the magnetic conductive plate 33, and the cost of the magnetic conductive plate 33 is lower than that of the magnet 31, so that the production cost of the sound generating device 100 can be saved.

As shown in fig. 6, fig. 6 is a BL curve simulation comparison graph of the magnet 31 in the sound generating device 100 in the circumferential magnetization mode and the parallel magnetization mode. In fig. 6, the solid line represents the BL curve in the circumferential magnetization mode, the broken line represents the BL curve in the parallel magnetization mode, the abscissa represents the vibration displacement of the voice coil 22, and the ordinate represents the BL value. Compared with the parallel magnetization mode, the BL curve value of the circumferential magnetization mode is larger and more symmetrical. In addition, as shown in fig. 7, by adopting a circumferential magnetization mode, the symmetry of the BL curve can be further improved by only adjusting the magnetization center of the magnetic member 34 according to actual needs, which is simple and convenient. In fig. 7, the solid line indicates the BL curve before the magnetization center of the unadjusted magnetic material 34 is adjusted, and the broken line indicates the BL curve after the magnetization center of the magnet 31 is adjusted.

Compared with the magnetic circuit design of the existing sound production device 100, the sound production device 100 of the present invention sets the magnetizing direction of at least one magnetic part 34 of the two magnetic parts 34 to be the circumferential direction, so that the magnetic induction lines are distributed along the circumferential direction, as shown in fig. 8, the magnetic flux density and uniformity in the magnetic gap 32 are improved, the voice coil 22 can be entirely located in the magnetic induction line dense region, the driving force factor BL is increased, and the symmetry of the BL curve can be improved by adjusting the magnetizing circle center of the magnet 31, the distortion, especially the low frequency distortion of the sound production device 100 is effectively reduced, the sensitivity of the sound production device is improved, and the sound quality of the sound production device 100 is improved without increasing the appearance size of the sound production device 100 and changing the internal structure design. In addition, because at least one magnetic part 34 adopts a circumferential magnetizing mode, and a magnetic induction line formed by at least one magnetic part 34 can extend towards the direction close to the magnetic gap 32, the sound production device 100 can also omit a central washer and a side washer structure in the traditional magnetic circuit design, so that the structure of the magnetic circuit system 30 is simpler, the BOM number of products is reduced, and the production cost is further reduced.

Further, a distribution plane of magnetic induction lines formed by the magnetic member 34 magnetized in the circumferential direction is parallel to the first direction, as shown in fig. 3, 5, 8 and 11, the magnetic member 34 magnetized in the circumferential direction is a magnet, and the distribution plane of the magnetic induction lines of the magnet 31 is vertically arranged and parallel to the second direction, so that the effectiveness and reliability of cutting the magnetic induction lines when the voice coil 22 vibrates up and down in a reciprocating manner are improved, and the sound quality of the sound generating device 100 is further improved.

In the first embodiment, each magnet 31 is a flat plate structure extending along the first direction, that is, each magnet 31 is a flat plate structure extending along the up-down direction, each magnet 31 is vertically arranged, so that a vertically arranged magnetic gap 32 is formed between two magnets 31, the voice coil 22 conveniently extends into the magnetic gap 32, and the magnets 31 and the voice coil 22 are arranged in parallel to each other, so that the up-down reciprocating motion of the voice coil 22 is not interfered, the smoothness and reliability of the cutting magnetic induction line of the voice coil 22 are improved, and the sound quality of the sound generating device 100 is improved.

In the second embodiment, magnet 31 and magnetic conduction plate 33 are the flat structure that extends along the first direction, that is, magnet 31 and magnetic conduction plate 33 are the flat structure that extends along the up-down direction, magnet 31 and magnetic conduction plate 33 all are vertical setting, make to form vertical setting's magnetic gap 32 between magnet 31 and the magnetic conduction plate 33, be convenient for voice coil 22 to stretch into in the magnetic gap 32, and magnet 31 and magnetic conduction plate 33 all set up with voice coil 22 is parallel to each other, do not interfere voice coil 22 up-down reciprocating motion, improve the smoothness and the reliability of voice coil 22 cutting magnetic induction line, promote the tone quality of vocal ware 100.

In one embodiment, the voice coil 22 is a flat ring structure, the voice coil 22 has two straight sections 221 that are disposed at intervals and have opposite current directions, the straight sections 221 extend along the length direction (the front-back direction shown in fig. 1) of the magnetic member, and the closed magnetic induction line passes through at least one of the straight sections 221 along the second direction. Specifically, the current direction in the straight sections 221 is the front-back direction shown in fig. 1, and the current directions in the two straight sections 221 are opposite, when the closed magnetic induction line passes through at least one straight section 221, according to the left-hand rule, the straight section 221 is subjected to an upward or downward magnetic field force, so that the voice coil 22 can be driven to vibrate up and down, and further the voice coil 22 can drive the diaphragm 21 to vibrate and generate sound.

In one embodiment, voice coil 22 extends out of magnetic gap 32 toward one side of diaphragm 21, and vibration system 20 further includes a bracket 23, one side of bracket 23 being coupled to diaphragm 21, and the other side of bracket 23 being coupled to the side of voice coil 22 extending out of magnetic gap 32. As shown in fig. 1 and 3, the diaphragm 21 is located above the voice coil 22, and the upper side of the voice coil 22 protrudes through the magnetic gap 32. A support 23 is arranged between the diaphragm 21 and the voice coil 22, the upper side of the support 23 is connected with the diaphragm 21, and the lower side of the support 23 is connected with the upper side of the voice coil 22 extending out of the magnetic gap 32, so that the voice coil 22, the support 23 and the diaphragm 21 are assembled. Through set up support 23 between voice coil 22 and vibrating diaphragm 21, support 23 plays the centering effect at the in-process of vibrating diaphragm 21 vibration from top to bottom, prevents that polarization phenomenon from appearing in vibrating diaphragm 21, and then improves product acoustic performance.

Further, the diaphragm 21 includes a diaphragm body 211 and a reinforcing portion 212 connected to the diaphragm body 211, and one side of the support 23 is connected to the reinforcing portion 212. The strength of the diaphragm 21 is improved by the arrangement of the reinforcing part 212, and the upper side of the bracket 23 is connected with the reinforcing part 212, so that the assembly is reliable and stable. Furthermore, the reinforcing portion 212 is provided with a protrusion structure 213, the protrusion structure 213 is formed to protrude from the reinforcing portion 212 toward the bracket 23, and the protrusion structure 213 is connected to the bracket 23. The protrusion 213 protrudes downward from the reinforcing part 212 to facilitate connection with the bracket 23. In an embodiment, the number of the protruding structures 213 is two, the two protruding structures 213 are correspondingly disposed at two ends of the reinforcing portion 212, and the number of the brackets 23 is the same as the number of the protruding structures 213 and is connected in a one-to-one correspondence manner. The quantity of support 23 is two, and the quantity of protruding structure 213 also is two, and two protruding structures 213 correspond the setting respectively and are connected in the front and back both ends of reinforcement portion 212, and two supports 23 and two protruding structures 213 one-to-one, both improved the fastness of support 23 with the assembly of vibrating diaphragm 21, also do benefit to the synchronism of the vibration of the preceding back both ends of vibrating diaphragm 21, optimize product acoustic performance.

In an embodiment, the casing 10 includes a first sub-casing 11, a second sub-casing 12, and a cover plate 13, the first sub-casing 11 and the cover plate 13 are respectively and correspondingly connected to two sides of the second sub-casing 12, the magnetic circuit system 30 is located in the second casing 10 and is mounted on the cover plate 13, the diaphragm 21 is located in the first sub-casing 11, and the second sub-casing 12 is provided with a through hole 121 through which the voice coil 22 passes. As shown in fig. 1 and 3, the first sub-housing 11 and the second sub-housing 12 are disposed above and below each other, the cover plate 13 covers the lower side of the second sub-housing 12, and the magnetic circuit system 30 is located in the second sub-housing 12 and mounted on the cover plate 13, so as to achieve the assembly of the magnetic circuit system 30 and the housing 10. The diaphragm 21 is located in the first sub-housing 11, and the second sub-housing 12 is provided with a through hole 121 for the voice coil 22 to pass through, so as to avoid interference on the voice coil 22, and realize the action of cutting the magnetic induction line by the up-and-down reciprocating motion of the voice coil 22.

The utility model also provides an electronic device, which comprises a housing and the sound production device 100 for the electronic device, which is accommodated in the housing. In one embodiment, the electronic device may be a headset, a sound box, a wearable device, or the like. The specific structure of the sound generating device 100 in the electronic device refers to the above embodiments, and since the electronic device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical solutions of the present invention, which are made by using the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound production device for an electronic device, comprising a housing, a vibration system and a magnetic circuit system, the vibration system comprising a diaphragm and a voice coil for driving the diaphragm to vibrate along a first direction,

the magnetic circuit system comprises two magnetic parts which are oppositely arranged along a second direction at intervals to form a magnetic gap, the second direction is vertical to the first direction, the plane where the voice coil is located is vertical to the plane where the vibrating diaphragm is located, and the voice coil is suspended in the magnetic gap; at least one of the two magnetic pieces is magnetized along the circumferential direction, at least one part of magnetic induction lines in the magnetic pieces magnetized along the circumferential direction extend towards the direction close to the magnetic gap, and the magnetic induction lines of the other magnetic piece form closed magnetic induction lines to penetrate through the voice coil along the second direction.

2. The sound-producing device for use in an electronic device of claim 1, wherein both of the magnetic members are magnets, each of the magnets being circumferentially magnetized.

3. The sound-producing device for an electronic device of claim 1, wherein one of the magnetic members is a magnet that is magnetized in a circumferential direction, and the other of the magnetic members is a magnetic conductive plate.

4. The sound-producing device for electronic equipment according to claim 1, wherein the magnetic member magnetized in the circumferential direction forms a magnetic induction line distribution plane parallel to the first direction.

5. The sound production device for an electronic device as claimed in claim 1, wherein the voice coil is a flat ring structure having two spaced apart flat sections with opposite current flow directions, the flat sections extending along the length of the magnetic member, and the closed magnetic induction line passing through at least one of the flat sections in the second direction.

6. The sound production device for an electronic device of any one of claims 1-5, wherein the voice coil extends out of the magnetic gap toward one side of the diaphragm, the vibration system further comprising a bracket, one side of the bracket being connected to the diaphragm, the other side of the bracket being connected to the side of the voice coil extending out of the magnetic gap.

7. The sound-producing device for an electronic device of claim 6, wherein the diaphragm includes a diaphragm body and a reinforcing portion connected to the diaphragm body, and one side of the support is connected to the reinforcing portion.

8. The sound-producing device according to claim 7, wherein the reinforcing portion has a protrusion protruding from the reinforcing portion toward the bracket, and the protrusion is connected to the bracket.

9. The sound production device for an electronic device as claimed in claim 6, wherein the housing comprises a first sub-housing, a second sub-housing and a cover plate, the first sub-housing and the cover plate are respectively connected to two sides of the second sub-housing, the magnetic circuit system is located in the second sub-housing and is mounted on the cover plate, the diaphragm is located in the first sub-housing, and the second sub-housing is provided with a through hole for the voice coil to pass through.

10. An electronic device, comprising a housing and a sound-producing device for an electronic device according to any one of claims 1 to 9 housed within the housing.