CN113099364B

CN113099364B - Electronic device

Info

Publication number: CN113099364B
Application number: CN202110353564.3A
Authority: CN
Inventors: 蔡晓东; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2022-11-22
Anticipated expiration: 2041-03-31
Also published as: WO2022206047A1; CN113099364A

Abstract

The invention discloses electronic equipment which comprises a shell and a sound generating device, wherein the sound generating device comprises a fixed shell, a magnetic circuit system and two vibration systems, the magnetic circuit system is arranged in the fixed shell, each vibration system comprises a vibrating diaphragm and a voice coil connected with the vibrating diaphragm, the two vibrating diaphragms are respectively arranged on two opposite sides of the magnetic circuit system and connected with the fixed shell, and at least part of the voice coils of the two vibration systems extend into a magnetic gap of the magnetic circuit system. The casing is equipped with installation cavity and two sound portions, and sound generating mechanism separates the installation cavity into two sound cavities, and one of them sound portion and a vibrating diaphragm intercommunication one of them sound cavity, another sound portion and another vibrating diaphragm intercommunication another sound cavity. The electronic equipment has a play mode and an earphone mode, wherein in the play mode, the two vibration systems radiate sound waves with the same phase outwards, and in the earphone mode, the two vibration systems radiate sound waves with opposite phases outwards. The technical scheme of the invention can reduce the risk of sound leakage of the electronic equipment.

Description

Electronic device

Technical Field

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

Background

In electronic devices, such as mobile phones, tablet computers, and handheld computers, a sound generating device is generally disposed inside the electronic device. However, when an electronic device such as a mobile phone is used to receive a call, the problem of sound leakage usually exists, which is very unfavorable for protecting personal privacy.

Disclosure of Invention

The invention mainly aims to provide electronic equipment, and aims to reduce the risk of sound leakage of the electronic equipment.

In order to achieve the above object, the present invention provides an electronic device, comprising:

the sound production device comprises a fixed shell, a magnetic circuit system and two vibration systems, wherein the magnetic circuit system is arranged in the fixed shell, each vibration system comprises a vibrating diaphragm and a voice coil connected to the vibrating diaphragm, the two vibrating diaphragms are respectively arranged on two opposite sides of the magnetic circuit system and connected with the fixed shell, and at least part of the voice coils of the two vibration systems extend into a magnetic gap of the magnetic circuit system; and (c) a second step of,

the sound-producing device divides the mounting cavity into two sound-producing cavities, wherein one sound-producing part and one vibrating diaphragm are communicated with one sound-producing cavity, and the other sound-producing part and the other vibrating diaphragm are communicated with the other sound-producing cavity;

the electronic device has a play mode and an earphone mode, in the play mode, the two vibration systems radiate sound waves with the same phase outwards through the corresponding sound emitting parts, and in the earphone mode, the two vibration systems radiate sound waves with opposite phases outwards through the corresponding sound emitting parts.

Optionally, the housing has a front surface provided with a display portion, a back surface disposed opposite to the front surface, and a top side surface between the back surface and the front surface;

one of the sound emitting parts is arranged on the front face or on the joint of the front face and the top side face, and the other sound emitting part is arranged on the back face, the top side face or the joint of the back face and the top side face.

Optionally, the two diaphragms are distributed at intervals in the arrangement direction of the front surface and the back surface.

Optionally, the sound outlet portion includes a plurality of first sound outlet holes, and the plurality of first sound outlet holes are all communicated with the sound outlet cavity.

Optionally, the casing is provided with a first limit step and a second limit step in the installation cavity, and the periphery of the sound generating device is clamped between the first limit step and the second limit step.

Optionally, the sound generating device further comprises at least one cover plate, the cover plate covers one side, away from the other vibrating diaphragm, of the vibrating diaphragm, a vibration cavity is formed between the cover plate and the vibrating diaphragm, and the cover plate is provided with a second sound outlet hole communicated with the vibration cavity and the sound outlet cavity.

Optionally, the cover plate includes a raised portion raised in a direction away from the diaphragm, and an annular connection portion disposed around a periphery of the raised portion, the annular connection portion is connected to the fixing case, and the second sound outlet is disposed in the raised portion.

Optionally, one side of the bulge portion, which faces away from the diaphragm, is provided with a sound outlet groove, the sound outlet groove is formed in a manner that two ends of the sound outlet groove are communicated with the sound outlet cavity, and the sound outlet groove is provided with the second sound outlet hole.

Optionally, the magnetic circuit system includes a central magnetic circuit structure and an edge magnetic circuit structure, the central magnetic circuit structure includes a central magnet and two central magnetic conductive plates respectively disposed at upper and lower sides of the central magnet, each central magnetic conductive plate includes a first magnetic conductive portion corresponding to the central magnet, the central magnet is disposed between the two first magnetic conductive portions, at least one central magnetic conductive plate includes a first connecting portion extending outward from an edge of the first magnetic conductive portion, and the first connecting portion is connected to the fixed case;

the side magnetic circuit structure is fixed on the fixed shell and comprises a side magnet arranged around the central magnet and two side magnetic conduction plates arranged on the upper side and the lower side of the side magnet, the side magnet and the first connecting part are distributed at intervals in the circumferential direction of the central magnet, and a magnetic gap is formed between the central magnet and the central magnetic conduction plate as well as between the side magnet and the side magnetic conduction plates;

every vibration system includes two flat voice coil loudspeaker voice coils, the central axis of two flat voice coil loudspeaker voice coils is perpendicular with two vibration system's vibration direction, one of them two flat voice coil loudspeaker voice coils of vibration system arrange and stretch into along first horizontal square in two parts that the magnetic gap is relative, another two flat voice coil loudspeaker voice coils of vibration system are along the perpendicular to arrange in the second horizontal direction of first horizontal direction, and stretch into in two parts that the magnetic gap is relative.

Optionally, the voice coils of the two vibration systems are both annular voice coils, and the central axes of the two annular voice coils are parallel to the vibration directions of the two vibration systems;

the magnetic circuit system forms two magnetic gaps with openings facing the two vibrating diaphragms respectively, and the two annular voice coils extend into the two magnetic gaps respectively.

Optionally, the magnetic circuit system includes a support plate, a first magnetic assembly disposed on a first side of the support plate, and a second magnetic assembly disposed on a second side of the support plate, the first magnetic assembly forming a first magnetic gap, the second magnetic assembly forming a second magnetic gap, and the two annular voice coils respectively extend into the first magnetic gap and the second magnetic gap.

According to the technical scheme, the sound production device divides the installation cavity in the shell into two sound outlet cavities, the sound outlet parts are arranged on the shell corresponding to the sound outlet cavities, and the sound production device is provided with the two vibration systems, so that the two vibration systems correspond to the two sound outlet cavities one by one, and sound can be produced through the two sound outlet parts. When a user uses the electronic equipment to talk, the electronic equipment can be set in an earphone mode, namely one of the sound emitting parts is close to the ear, and the sound waves radiated outwards by the sound emitting part close to the ear are opposite to the sound waves radiated outwards by the other sound emitting part by controlling the two vibration systems. Therefore, an acoustic dipole effect can be formed, the sounds emitted by the two sound emitting parts are mutually offset at the peripheral position of the user of the electronic equipment, the risk of sound leakage when the user uses the electronic equipment for communication can be reduced, and the privacy protection function when the electronic equipment is used for communication is realized. And because the two vibration systems can work independently, parameters such as signals, voltages and the like of the two vibration systems can be adjusted at will, so that the optimal conversation and privacy protection effects are achieved. In addition, the electronic equipment can be arranged in an external sound playing mode, namely, two vibration systems can be controlled to radiate sound waves with the same phase outwards through two sound emitting parts, the insufficient volume caused by the size of the sound emitting device can be made up, the volume can be effectively increased, and the sound emitting parts can be used as loudspeakers to play sound outwards.

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 a schematic structural diagram of an electronic device according to an embodiment of the invention;

FIG. 2 is a schematic view of the electronic device shown in FIG. 1 from another perspective;

FIG. 3 is a cut-away schematic view of the electronic device of FIG. 1 at a sound generator; (ii) a

FIG. 4 is a schematic structural diagram of an electronic device according to another embodiment of the invention;

FIG. 5 is a cut-away schematic view of the electronic device of FIG. 4 at a sound generator;

FIG. 6 is a schematic sectional view of an electronic device of another embodiment of the present invention at a sound generating device;

FIG. 7 is an enlarged view taken at A in FIG. 6;

FIG. 8 is a schematic view of the sound generator of FIG. 6;

FIG. 9 is an exploded view of a sound generator in a further embodiment of the electronic device of the present invention;

fig. 10 is an exploded view of the magnetic circuit system of fig. 9;

fig. 11 is a sectional view of the assembled sound generator of fig. 9.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Shell body	224	Side magnet
11	Mounting cavity	225	Supporting plate
				111	Sound outlet cavity	226	A first magnetic conductive part
12	Sound output part	227	First connecting part
				13	Front side	228	First magnetic assembly
14	Back side of the panel	229	Second magnetic assembly
				15	Top side surface	23	Vibration system
16	First limit step	231	Voice coil/flat voice coil/annular voice coil
				17	Second limit step	233	Vibrating diaphragm
20	Sound producing device	24	Cover plate
				21	Fixed shell	241	Second sound outlet
22	Magnetic circuit system	242	Annular connection part
				220	Magnetic gap	243	Raised part
221	Central magnetic conduction plate	244	Sound outlet groove
				222	Edge magnetic conduction plate	251	Second connecting part
223	Central magnet	252	Side magnetic conduction 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.

In addition, if there is a description relating to "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 relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the 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 invention provides an electronic device which can be a mobile phone, a tablet computer, a computer or an intelligent watch and the like.

In an embodiment of the present invention, please refer to fig. 1 to fig. 3 in combination, the electronic device includes a housing 10 and a sound generating device 20, the sound generating device 20 includes a fixed casing 21, a magnetic circuit 22 and two vibration systems 23, the magnetic circuit 22 is disposed in the fixed casing 21, each vibration system 23 includes a diaphragm 233 and a voice coil 231 connected to the diaphragm 233, the two diaphragms 233 are disposed on two opposite sides of the magnetic circuit 22 and connected to the fixed casing 21, and the voice coils 231 of the two vibration systems 23 at least partially extend into a magnetic gap 220 of the magnetic circuit 22. The housing 10 is provided with a mounting cavity 11 and two sound-emitting portions 12, the sound-emitting device 20 divides the mounting cavity 11 into two sound-emitting cavities 111, one of the sound-emitting portions 12 and one of the diaphragms 233 are communicated with one of the sound-emitting cavities 111, and the other of the sound-emitting portions 12 and the other diaphragm 233 are communicated with the other sound-emitting cavity 111.

In this embodiment, one of the diaphragms 233 is communicated with one of the sound outlet chambers 111, and the other diaphragm 233 is communicated with the other sound outlet chamber 111, which means that the spaces of the sides of the two diaphragms 233 facing away from each other are respectively communicated with the two sound outlet chambers 111 in a one-to-one correspondence manner, so that when the diaphragms 233 vibrate to generate sound, the sound can be transmitted out of the casing 10 from the sound outlet chambers 111 and the sound outlet portion 12. The two sound emitting portions 12 are spaced apart from each other on the housing 10, sound emitting directions of the two sound emitting portions 12 form an included angle or are opposite to each other, and the two sound emitting portions 12 may be located on different sides or other positions of the electronic device, for example, when the electronic device is a smart watch, both the two sound emitting portions 12 may be located on the periphery of the electronic device. The two vibration systems 23 can operate independently, and the voice coils 231 of the two vibration systems 23 do not interfere with each other when vibrating simultaneously. Wherein the magnetic circuit system 22 is formed with two magnetic gaps, the voice coils 231 of the two vibration systems 23 each extend into one magnetic gap, and so on.

The electronic device has a play mode in which the two vibration systems 23 radiate sound waves of the same phase outward through the respective corresponding sound emitting portions 12, and an earphone mode in which the two vibration systems 23 radiate sound waves of opposite phases outward through the respective corresponding sound emitting portions 12. That is, in the play mode, the two diaphragms 233 are controlled to vibrate simultaneously in opposite directions, so that the two vibration systems 23 radiate normal-phase sound waves simultaneously outwards through the corresponding sound emitting portions 12, and the sound volume can be effectively increased, so that the sound generating device 20 can be used as a loudspeaker to play sound outwards. In the earpiece mode, the two diaphragms 233 are controlled to vibrate simultaneously in the same direction, so that when one of the vibration systems 23 radiates the positive phase sound wave/the negative phase sound wave outwards through the corresponding sound emitting portion 12, the other vibration system 23 radiates the negative phase sound wave/the positive phase sound wave outwards through the corresponding sound emitting portion 12. When the electronic device is used for communication, one of the sound emitting portions 12 is close to the ear of a user, and the other sound emitting portion 12 is far away from the ear of the user relative to the sound emitting portion 12, so as to form an acoustic dipole effect for people around the user, specifically, the distance between the two sound emitting portions 12 can be ignored, the distances between the two sound emitting portions 12 and the ears of the people around the user are close, and the sound waves with opposite phases of the two vibration systems 23 reach the positions of the ears of the people around the user to be mutually cancelled, so that the purpose of reducing the noise leakage is achieved. For the user, the distance between the two sound outlet portions 12 and the ear of the user is relatively different, so that the condition of the dipole effect is not satisfied, the sound wave cancellation degree is small, and the user can listen to the sound with proper loudness.

According to the technical scheme, the sound generating device 20 divides the mounting cavity 11 in the shell 10 into two sound outlet cavities 111, the sound outlet part 12 is arranged on the shell 10 corresponding to each sound outlet cavity 111, and the sound generating device 20 is provided with the two vibration systems 23, so that the two vibration systems 23 correspond to the two sound outlet cavities 111 one by one, and sound can be generated through the two sound outlet parts 12. When a user uses the electronic device to talk, the electronic device can be set in an earphone mode, that is, one of the sound emitting portions 12 can be close to the ear, and the sound waves radiated outwards by the sound emitting portion 12 close to the ear are opposite in phase to the sound waves radiated outwards by the other sound emitting portion 12 by controlling the two vibration systems 23. Therefore, an acoustic dipole effect can be formed, so that the sounds emitted by the two sound emitting parts 12 are mutually offset at the peripheral position of the user of the electronic equipment, the risk of sound leakage when the user uses the electronic equipment for conversation can be reduced, and the privacy protection function of the electronic equipment for conversation is realized. And because two vibration systems 23 can work independently, so can adjust parameters such as signal and voltage of two vibration systems 23 at will to reach best conversation and privacy protection effect. In addition, the electronic device may be set in the play mode, that is, the two vibration systems 23 may be controlled to radiate sound waves with the same phase through the two sound emitting portions 12, so that the volume deficiency caused by the size of the sound emitting device 20 may be compensated, the volume may be effectively increased, and the sound emitting portions 12 may be used as speakers to play sound.

In the embodiment, the electronic device is taken as a mobile phone for illustration, but not limited thereto. The housing 10 has a front face 13, a rear face 14, and a top face 15, the front face 13 being provided with a display portion, the rear face 14 being disposed opposite the front face 13, and the top face 15 being located between the rear face 14 and the front face 13.

The relative position relationship of the two sound emitting portions 12 has various relationships, for example, in one embodiment, one sound emitting portion 12 is disposed at the junction of the front surface 13 and the top surface 15, and the other sound emitting portion 12 is disposed at the junction of the back surface 14 and the top surface 15. When one of the sound emitting parts 12 is arranged at the joint of the front face 13 and the top side face 15, the sound emitting part 12 can be well coupled with the ear part when a user communicates, so that the user can clearly listen to the sound emitted from the sound emitting part 12, and the communication listening effect of the user is improved. The occupied space of the sound emitting part 12 on the front face 13 can be reduced, namely, the space of the sound emitting part 12 occupying the front face 13 for setting the screen is reduced, the size of the screen is increased, and the mobile phone with the full screen is realized. On the other hand, by providing the other sound emitting portion 12 at the junction between the back surface 14 and the top surface 15, when the two sound emitting portions 12 are used as speakers to emit sound, the matching effect of the two sound emitting portions 12 can be improved, thereby increasing the volume of the emitted sound. Therefore, the better conversation privacy protection function and the loudspeaker playing function can be achieved. Of course, in other embodiments, one sound emitting portion 12 is disposed on the front surface 13, and the other sound emitting portion 12 is disposed at the junction of the back surface 14 and the top side surface 15. So also can guarantee that this play sound portion 12 is effectual with ear's coupling when the user talks for the user can clearly answer the sound of sending from this play sound portion 12, promotes the user and talks and answers the effect, can reach better earth sound dipole effect and better speaker and play the function outward.

In another embodiment, one of the sound emitting portions 12 is disposed at the junction of the front surface 13 and the top surface 15, and the other sound emitting portion 12 is disposed at the back surface 14. So can enough guarantee that this sound portion 12 is effectual with the ear coupling when the user talks for the user can clearly answer the sound of sending from this sound portion 12, promotes the user and talks and answer the effect, can also reduce sound portion 12 at the occupation space of front 13. And the other sound emitting portion 12 is provided on the back surface 14. The sound outlet part 12 arranged on the back surface 14 can be far away from the sound outlet part 12 arranged at the joint of the front surface 13 and the top side surface 15, so that better sound dipole effect can be achieved, and the sound leakage risk is further reduced. Of course, in other embodiments, one of the sound emitting portions 12 is disposed on the front surface 13, and the other sound emitting portion 12 is disposed on the rear surface 14. So also can guarantee that this sound portion 12 is effectual with ear's coupling when the user talks for the user can clearly answer the sound of sending out from this sound portion 12, promotes the user and talks and answers the effect, can reach better earth sound dipole effect.

In another embodiment, please refer to fig. 4 and 5 in combination, wherein one sound emitting portion 12 is disposed at the junction between the front surface 13 and the top side surface 15, and the other sound emitting portion 12 is disposed on the top side surface 15. So can enough guarantee that this sound portion 12 is effectual with the ear coupling when the user talks for the user can clearly answer the sound of sending out from this sound portion 12, promotes the user and talks and answers the effect, can also reduce the occupation space of sound portion 12 in front 13. When the two sound emitting portions 12 are used as speakers to emit sound, the matching effect of the two sound emitting portions 12 can be improved, and the volume of the emitted sound can be improved. Of course, in other embodiments, one of the sound emitting portions 12 is disposed on the front surface 13, and the other sound emitting portion 12 is disposed on the top side surface 15. So also can guarantee that this sound portion 12 is effectual with the ear coupling when the user talks for the sound that this sound portion 12 sent can clearly be answered to the user, promotes the user and talks and answer the effect, can reach better earth sound dipole effect.

Referring to fig. 3, in an embodiment, two diaphragms 233 are distributed at intervals in the arrangement direction of the front surface 13 and the back surface 14. That is, the two diaphragms 233 are arranged between the front surface 13 and the back surface 14 in parallel, so that the size of the diaphragms 233 is large, the sound generating effect is improved, the occupied space of the sound generating device 20 in the thickness direction of the casing 10 can be reduced, and the thickness of the electronic device is reduced. Of course, in other embodiments, the two diaphragms 233 may be distributed at intervals in a direction perpendicular to the arrangement direction of the front surface 13 and the back surface 14.

In one embodiment, the sound output portion 12 includes a plurality of first sound output holes, and the plurality of first sound output holes are all communicated with the sound output cavity 111. Specifically, the plurality of first sound outlet holes are spaced in the same direction, for example, the plurality of first sound outlet holes are spaced in the longitudinal direction of the top surface 15. Compared with the case that the sound outlet part 12 is configured as a strip-shaped hole structure, the plurality of first sound outlet holes are configured in such a way, so that the sound outlet area can be ensured, the size of the first sound outlet holes can be reduced, and the possibility of entering foreign matters such as dust in the first sound outlet holes is reduced. Of course, in other embodiments, the sound outlet portion 12 may be a long hole.

In one embodiment, the housing 10 has a first limiting step 16 and a second limiting step 17 disposed in the mounting cavity 11, and the periphery of the sound generating device 20 is clamped between the first limiting step 16 and the second limiting step 17. That is, the peripheral edge of the side of the sound generating device 20 departing from the first limit step 16 abuts against the second limit step 17, and the peripheral edge of the side of the sound generating device 20 departing from the second limit step 17 abuts against the first limit step 16. Therefore, the movement of the sound generating device 20 can be well limited, and the stability of the sound generating device 20 is improved. Of course, in other embodiments, the circumference of the sound emitting device 20 may be connected to the housing 10.

Referring to fig. 6 to 8, in an embodiment, the sound generating device 20 further includes at least one cover plate 24, the cover plate 24 covers a side of one of the diaphragms 233 facing away from the other diaphragm 233, a vibration cavity is formed between the cover plate 24 and the diaphragm 233, and the cover plate 24 is provided with a second sound outlet 241 communicating the vibration cavity and the sound outlet cavity 111. In this embodiment, one side of any one of the diaphragms 233 facing away from another diaphragm 233 is provided with one cover plate 24, and by providing the cover plate 24, the diaphragm 233 can be effectively protected, for example, during an assembly process, the diaphragm 233 can be prevented from being exposed to the outside, so that a risk that the diaphragm 233 is scratched during the assembly process is reduced. Of course, in other embodiments, the cover plate 24 may be disposed on only one side of one of the diaphragms 233, or the cover plate 24 may not be disposed.

In one embodiment, the cover plate 24 includes a raised portion 243 raised in a direction away from the diaphragm 233, and an annular connection portion 242 disposed around the periphery of the raised portion 243, the annular connection portion 242 is connected to the fixed case 21, and the second sound outlet 241 is disposed in the raised portion 243. That is, the middle of the inner surface of the cover plate 24 (the surface facing the diaphragm 233) is recessed toward the direction away from the diaphragm 233, and the outer surface of the cover plate 24 (the surface facing away from the diaphragm 233) is correspondingly raised to form the raised portion 243, so that the inner surface of the cover plate 24 is made to escape from the diaphragm 233, a larger vibration space is provided for the vibration of the diaphragm 233, and the interference of the diaphragm 233 and the cover plate 24 during the vibration is avoided. Wherein the bulge 243 may abut against the wall of the sound emitting cavity 111 to increase the stability of the sound emitting device 20. Of course, the bulge 243 may be spaced apart from the wall of the sound-emitting chamber 111. In an embodiment, the first limiting step 16 (the second limiting step 17) abuts against the annular connecting portion 242 of the corresponding cover plate 24, that is, the first limiting step 16 (the second limiting step 17) abuts against a surface of the annular connecting portion 242 facing away from the other cover plate 24.

When the cover plate 24 is disposed, in order to ensure a better sound output effect, in an embodiment, a sound output groove 244 is disposed on a side of the protruding portion 243 away from the vibrating diaphragm 233, the sound output groove 244 is disposed with two ends penetrating to communicate with the sound output cavity 111, and the sound output groove 244 is disposed with a second sound output hole 241. That is, both ends of the sound emitting groove 244 penetrate the circumferential surface of the protruding portion 243 to communicate both ends of the sound emitting groove 244 with the sound emitting chamber 111, and the bottom of the sound emitting groove 244 is provided with the second sound emitting hole 241. With such an arrangement, it can be ensured that the distance between the bottom of the sound outlet groove 244 and the wall of the sound outlet cavity 111 is large, and even when the protruding portion 243 abuts against the wall of the sound outlet cavity 111, the second sound outlet hole 241 in the sound outlet groove 244 can be prevented from being blocked, so that normal transmission of sound can be ensured.

In one embodiment, the second sound emitting hole 241 is also disposed on the outer peripheral surface of the raised portion 243 to increase the sound transmission area between the vibration cavity and the sound emitting cavity 111, so that even if the surface of the raised portion 243 away from the other cover plate 24 abuts against the cavity wall of the sound emitting cavity 111, the second sound emitting hole 241 on the outer peripheral surface of the raised portion 243 can be prevented from being blocked, thereby ensuring positive transmission of sound. Ensuring the sound output effect of the sound generating device 20. In one embodiment, the outer circumferential surface of the protruding portion 243 is inclined, so that more second sound emitting holes 241 can be formed on the outer circumferential surface of the protruding portion 243.

Referring to fig. 9 to 11, the magnetic circuit system 22 has various structures, for example, in an embodiment, the magnetic circuit system 22 includes a central magnetic circuit structure and a side magnetic circuit structure, the central magnetic circuit structure includes a central magnet 223 and two central magnetic conductive plates 221 respectively disposed on upper and lower sides of the central magnet 223, each central magnetic conductive plate 221 includes a first magnetic conductive portion 226 corresponding to the central magnet 223, the central magnet 223 is disposed between the two first magnetic conductive portions 226, at least one central magnetic conductive plate 221 includes a first connecting portion 227 extending outward from an edge of the first magnetic conductive portion 226, and the first connecting portion 227 is connected to the fixing shell 21;

magnetic circuit 22 includes central magnetic structure and limit magnetic structure, central magnetic structure includes central magnet 223, locate two central magnetic conduction boards 221 of center magnet 223 upper and lower both sides respectively, every central magnetic conduction board 221 includes the first magnetic conduction portion 226 that corresponds with central magnet 223, at least one central magnetic conduction board 221 includes the first connecting portion 227 that extends the setting by the bight of first magnetic conduction portion 226, central magnet 223 is located between two first magnetic conduction portions 226, first connecting portion 227 is towards the lateral bulge of central magnet 223, and be connected with set casing 21.

The side magnetic circuit structure is fixed on the fixed shell 21, the side magnetic circuit structure comprises a side magnet 224 arranged around the central magnet 223 and two side magnetic conductive plates 222 arranged on the upper side and the lower side of the side magnet 224, the side magnet 224 and the first connecting part 227 are distributed at intervals in the circumferential direction of the central magnet 223, and a magnetic gap 220 is formed between the central magnet 223 and the central magnetic conductive plate 221 and between the side magnet 224 and the side magnetic conductive plates 222; the side magnetic conductive plate 222 and the first connecting portion 227 of the central magnetic conductive plate 221 may be connected as a whole, or may be separated from each other.

Each vibration system 23 includes two flat voice coils 231, the central axes of the two flat voice coils 231 are perpendicular to the vibration direction of the two vibration systems 23, the two flat voice coils 231 of one vibration system 23 are arranged along a first horizontal square and extend into two opposite portions of the magnetic gap 220, and the two flat voice coils 231 of the other vibration system 23 are arranged along a second horizontal direction perpendicular to the first horizontal direction and extend into two opposite portions of the magnetic gap 220. Specifically, the up-down direction is a vibration direction of the two vibration systems 23, and the up-down direction is perpendicular to the first horizontal direction and the second horizontal direction.

The central magnet 223 is disposed on the first magnetic conductive portion 226 of the central magnetic conductive plate 221, the first connecting portion 227 of the central magnetic conductive plate 221 extends toward the outside of the central magnet 223 to be connected to the fixed casing 21, and the first connecting portion 227 and the side magnets 224 of the magnetic circuit system 22 are spaced apart in the circumferential direction of the central magnet 223. So can be through being connected of first connecting portion 227 and set casing 21 and realize the fixed of center magnet 223, also can avoid first connecting portion 227 to occupy the clearance condition between center magnetic circuit structure and the limit magnetic circuit structure, thereby under the condition of guaranteeing flat voice coil 231 normal vibration, can make the magnetic gap 220 width between center magnetic circuit structure and the limit magnetic circuit structure less, thereby can increase the space of placing of interior edge magnet 224 of set casing 21 and center magnet 223, with the volume that can increase limit magnet 224 or center magnet 223, promote sound generating mechanism 20's magnetic performance, make the effective magnetic field intensity that two vibration system's 22 flat voice coil 231 can obtain great, strengthen sound generating mechanism 20's sound loudness, can promote sound generating mechanism 20's acoustic performance.

In one embodiment, the flat voice coil 231 and the first connection portion 227 are spaced apart from each other in the circumferential direction of the central magnet 223. Specifically, the flat voice coil 231 has two wire segments distributed at intervals along the arrangement direction (vibration direction) of the two diaphragms 233, and the two wire segments of the flat voice coil 231 are both located in the magnetic gap 220, that is, one of the wire segments of the flat voice coil 231 is at least partially located in the magnetic gap 220 formed by the central magnetic conductive plate 221 and the side magnetic conductive plate 222 on one side of the central magnet 223, and the other wire segment of the flat voice coil 231 is at least partially located in the magnetic gap 220 formed by the central magnetic conductive plate 221 and the side magnetic conductive plate 222 on the other side of the central magnet 223. Therefore, when the first connection portion 227 exists between the flat voice coils 231 of the two vibration systems 23, the first connection portion 227 occupies the space of the magnetic gap 220 in the depth direction (i.e., the vibration direction), that is, the situation that the first connection portion 227 and the flat voice coils 231 share the space in the depth direction of the magnetic gap 220 is avoided, the space in the depth direction of the magnetic gap 220 can be fully utilized, and the space utilization rate is improved. Thereby, the vibration space of the flat voice coil 231 in the magnetic gap 220 can be increased, and the vibration effect of the vibration system 23 can be improved. And moreover, the two lead wire sections of the flat voice coil 231 can be ensured to be positioned in an effective magnetic field, so that the effective magnetic field intensity of the voice coils of the two vibration systems 23 is ensured to be larger, and the sound loudness of the sound generating device is enhanced. Of course, in other embodiments, the wire segment of the flat voice coil 231 of the vibration system 23 away from the diaphragm 233 thereof may also extend into the magnetic gap 220, and the wire segment of the flat voice coil 231 of the vibration system 23 close to the diaphragm 233 thereof is located outside the magnetic gap 220.

In one embodiment, each of the two central magnetic conduction plates 221 includes a first magnetic conduction portion 226 and a first connection portion 227, the first connection portions 227 of the two central magnetic conduction plates 221 are disposed opposite to each other, and the first connection portions 227 of the two central magnetic conduction plates 221 are bent toward each other and connected to each other. That is, each central magnetic conductive plate 221 includes a first magnetic conductive portion 226 and a first connecting portion 227, the central magnet 223 is disposed between two first magnetic conductive portions 226, each first connecting portion 227 is disposed between two adjacent side magnets 224, the first connecting portion 227 of each central magnetic conductive plate 221 is bent toward the direction of the other central magnetic conductive plate 221, so as to be connected to the first connecting portion 227 of the other central magnetic conductive plate 221, so as to increase the stability of the central magnet 223 between two central magnetic conductive plates 221. Of course, in other embodiments, the first connecting portion 227 may also be straight, that is, the first connecting portion 227 is not bent, or the first connecting portions 227 of the two central magnetic conductive plates 221 are connected by a connecting structure, for example, a connecting member is disposed at the first connecting portions 227 of the two central magnetic conductive plates 221.

In one embodiment, the central magnetic conductive plate 221 includes at least two first connecting portions 227 disposed on two opposite sides of the first magnetic conductive portion 226. That is, the central magnetic conductive plate 221 can be connected to the fixed casing 21 through the first connecting portion 227 at the two opposite sides of the first magnetic conductive portion 226, which not only increases the connection area between the central magnetic conductive plate 221 and the fixed casing 21, but also makes the two opposite sides of the first magnetic conductive portion 226 uniformly stressed, so as to improve the stability of the central magnetic conductive plate 221 and ensure that the magnetic circuit system 22 remains stable in the vibration process. In some embodiments, the number of the first connecting portions 227 may also be three, four or more, and so on. Of course, in other embodiments, the first connecting portion 227 may be only on one side of the first magnetic conductive portion 226.

Further, in an embodiment, the side magnetic conductive plate 222 includes a second connecting portion 251 and a side magnetic conductive portion 252, the second connecting portion 251 is annular and connected to the fixed casing 21, the side magnetic conductive portion 252 is connected to an inner side of the second connecting portion 251, and the side magnetic body 224 is provided with the side magnetic conductive portions 252 on surfaces facing the two diaphragms 233. Specifically, the magnetic circuit system 22 includes two side-conducting plates 222, one of the side-conducting plates 222 is disposed on a side of the side magnet 224 facing one of the diaphragms 233, the other side-conducting plate 222 is disposed on a side of the side magnet 224 facing the other diaphragm 233, and each side-conducting plate 222 includes a second connecting portion 251 and a side-conducting portion 252.

A plurality of side magnetic conductive portions 252 may be disposed inside the second connecting portion 251, and the number of the side magnetic conductive portions 252 may be set according to the number of the side magnets 224, for example, one side magnetic conductive portion 252 may be disposed corresponding to each side magnet 224. Make second connecting portion 251 and limit magnetic conduction portion 252 integrated into one piece, compare in the mode that sets up a plurality of independent limit magnetic conduction boards 222, so can make limit magnetic conduction portion 252 and second connecting portion 251 be connected as an organic wholely, can reduce sound generating mechanism's spare part quantity to be favorable to reducing the assembly process, improve production efficiency. And the outer circumference of the second connecting part 251 is connected to the fixing case 21, so that the connection stability of the edge magnetic conduction plate 222 can be improved. Of course, in other embodiments, the side magnetic conductive portion 252 may also have a ring shape, so as to be disposed on the surface of the side magnets 224 facing the diaphragm 233.

In one embodiment, the first connecting portion 227 is connected to the second connecting portion 251, and the central magnetic conductive plate and the side magnetic conductive plates are integrally formed. This facilitates the manufacturing and molding of the central magnetic conductive plate 221 and the edge magnetic conductive plate 222, and reduces the connecting process of the central magnetic conductive plate 221 and the edge magnetic conductive plate 222. Of course, in other embodiments, the first connection portion 227 and the second connection portion 251 may be welded together. In addition, in other embodiments, the central magnetic plate 221 and the side magnetic plate 222 may be separately disposed.

In addition, referring to fig. 3, in an embodiment, the voice coils of the two vibration systems 23 are both annular voice coils 231, and the central axes of the two annular voice coils 231 are parallel to the vibration directions of the two vibration systems 23. The magnetic circuit system 22 forms two magnetic gaps opening to the two diaphragms 233, respectively, and the two ring-shaped voice coils 231 extend into the two magnetic gaps 220, respectively. When the voice coils of the two vibration systems 23 are both the annular voice coil 231, the annular end face of one end of the annular voice coil 231 can be connected to the vibrating diaphragm 233, so that the connection reliability of the annular voice coil 231 and the vibrating diaphragm 233 can be ensured, and the structure of the vibration system can be simplified.

In one embodiment, the magnetic circuit system 22 includes a support plate 225, a first magnetic assembly 228 disposed on a first side of the support plate 225, and a second magnetic assembly 229 disposed on a second side of the support plate 225, the first magnetic assembly 228 forming a first magnetic gap, the second magnetic assembly 229 forming a second magnetic gap, and two voice coils 231 extending into the first magnetic gap and the second magnetic gap, respectively. Specifically, a first side of the support plate 225 faces one of the diaphragms 233, and a second side of the support plate 225 faces the other diaphragm 233. That is, the first magnetic assembly 228 is located between the support plate 225 and one of the diaphragms 233, and the second magnetic assembly 229 is located between the support plate 225 and the other diaphragm 233. The support plate 225 may thus be of a simple flat plate structure, which is advantageous for simplifying the structure of the sound emitting device 20. Of course, in other embodiments, two support plates 225 may be provided, the magnet assembly disposed between two support plates 225, and so forth.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by 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. An electronic device, comprising:

the sound production device comprises a fixed shell, a magnetic circuit system, two vibration systems and at least one cover plate, wherein the magnetic circuit system is arranged in the fixed shell, each vibration system comprises a vibrating diaphragm and a voice coil connected to the vibrating diaphragm, the two vibrating diaphragms are respectively arranged on two opposite sides of the magnetic circuit system and connected with the fixed shell, at least parts of the voice coils of the two vibration systems extend into a magnetic gap of the magnetic circuit system, the cover plate covers one side, away from the other vibrating diaphragm, of one vibrating diaphragm, a vibration cavity is formed between the cover plate and the vibrating diaphragm, the cover plate is provided with a plurality of second sound outlet holes communicated with the vibration cavity and the sound outlet cavities, the plurality of second sound outlet holes are distributed on the cover plate, and the second sound outlet holes are configured into micropores; and the number of the first and second groups,

the electronic device has a play mode and an earphone mode, in the play mode, the two vibration systems radiate sound waves with the same phase outwards through the sound outlet parts corresponding to the two vibration systems, and in the earphone mode, the two vibration systems radiate sound waves with opposite phases outwards through the sound outlet parts corresponding to the two vibration systems.

2. The electronic device of claim 1, wherein the housing has a front side provided with a display, a back side disposed opposite the front side, and a top side between the back side and the front side;

3. The electronic device of claim 2, wherein two of the diaphragms are disposed in parallel between the front side and the back side.

4. The electronic device of claim 1, wherein the sound emitting portion comprises a plurality of first sound emitting holes, each of the plurality of first sound emitting holes being in communication with the sound emitting chamber.

5. The electronic device of claim 1, wherein the housing has a first stop step and a second stop step in the mounting cavity, and the periphery of the sound generating device is clamped between the first stop step and the second stop step.

6. The electronic device according to claim 1, wherein the cover plate includes a raised portion raised in a direction away from the diaphragm, and an annular connection portion provided around a periphery of the raised portion, the annular connection portion being connected to the stationary case, and the second sound outlet hole being provided in the raised portion.

7. The electronic device as claimed in claim 6, wherein a side of the protrusion portion facing away from the diaphragm is provided with a sound outlet groove, two ends of the sound outlet groove are disposed through to communicate with the sound outlet cavity, and the sound outlet groove is provided with the second sound outlet hole.

8. The electronic device according to any one of claims 1 to 7, wherein the magnetic circuit system includes a central magnetic circuit structure and an edge magnetic circuit structure, the central magnetic circuit structure includes a central magnet, two central magnetic conductive plates respectively disposed on upper and lower sides of the central magnet, each central magnetic conductive plate includes a first magnetic conductive portion corresponding to the central magnet, the central magnet is disposed between the two first magnetic conductive portions, at least one central magnetic conductive plate includes a first connecting portion extending outward from an edge of the first magnetic conductive portion, and the first connecting portion is connected to the fixed housing;

every vibration system includes two flat voice coils, the central axis of two flat voice coils is perpendicular with two vibration system's vibration direction, one of them two flat voice coils of vibration system are arranged and are stretched into along first horizontal square in the two parts that the magnetic gap is relative, another two flat voice coils of vibration system are along the perpendicular to the second horizontal direction of first horizontal direction is arranged, and stretch into in the two parts that the magnetic gap is relative.

9. The electronic device according to any one of claims 1 to 7, wherein the voice coils of the two vibration systems are both annular voice coils, and central axes of the two annular voice coils are parallel to the vibration directions of the two vibration systems;

10. The electronic device of claim 9, wherein the magnetic circuit system comprises a support plate and a first magnetic assembly disposed on a first side of the support plate and a second magnetic assembly disposed on a second side of the support plate, the first magnetic assembly forming a first magnetic gap and the second magnetic assembly forming a second magnetic gap, the two voice coils extending into the first magnetic gap and the second magnetic gap, respectively.