CN117440305A

CN117440305A - Electronic equipment

Info

Publication number: CN117440305A
Application number: CN202311764763.9A
Authority: CN
Inventors: 蔡晓东; 刘松; 李波波
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2023-12-21
Filing date: 2023-12-21
Publication date: 2024-01-23
Anticipated expiration: 2043-12-21
Also published as: CN117440305B

Abstract

The invention discloses electronic equipment, which comprises a sound generating device and a shell, wherein the sound generating device comprises a first vibration unit and a second vibration unit, the first vibration unit and the second vibration unit are arranged in a back-to-back manner, the first vibration unit comprises a first vibrating diaphragm and a second vibrating diaphragm, the first vibrating diaphragm is arranged on the periphery of the second vibrating diaphragm in a surrounding manner, the second vibration unit comprises a third vibrating diaphragm, the first vibrating diaphragm, the second vibrating diaphragm and the third vibrating diaphragm are coaxially arranged, and the third vibrating diaphragm and the second vibrating diaphragm are opposite and are connected; the shell is provided with an installation cavity, the sound generating device is installed in the installation cavity, and the shell is provided with a first sound outlet hole and a second sound outlet hole corresponding to the first vibration unit and the second vibration unit respectively; in the external mode, the first vibrating diaphragm, the second vibrating diaphragm and the third vibrating diaphragm vibrate together to produce sound; in the receiver mode, the second vibrating diaphragm and the third vibrating diaphragm vibrate in the same direction. The technical scheme of the invention can reduce the risk of sound leakage of the electronic equipment and improve the sound production effect of the sound production device.

Description

Electronic equipment

Technical Field

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

Background

Currently, in order to make an electronic product (such as a mobile phone) in the related art have a better play effect when it is in a play mode, and have a better privacy protection effect when it is in a receiver mode. Generally, a single sound generating unit with two sides is used in an audio system of an electronic product, so that two sound waves with the same phase are emitted to perform superposition enhancement to achieve the sound quality effect when the external playing mode is improved, or two sound waves with opposite phases are emitted to perform offset attenuation based on the sound dipole effect to achieve the privacy protection effect when the earphone mode is improved. However, when the existing electronic devices such as mobile phones and the like are in a telephone receiver mode, for example, when receiving a call, due to the fact that TS parameters of the internal double-sided sounding monomers are different, an ideal counteracting effect can be achieved only by continuously debugging signals, and application difficulty is increased.

Disclosure of Invention

The invention mainly aims to provide electronic equipment, which aims to reduce the risk of sound leakage of the electronic equipment and improve the sound production effect of a sound production device.

In order to achieve the above object, an electronic device according to the present invention includes:

the sound generating device comprises a first vibration unit and a second vibration unit, wherein the first vibration unit and the second vibration unit are arranged in a back-to-back mode, the outer contour size of the first vibration unit is larger than that of the second vibration unit, the first vibration unit comprises a first vibration film and a second vibration film, the first vibration film is arranged on the periphery of the second vibration film in a surrounding mode, the second vibration unit comprises a third vibration film, the first vibration film, the second vibration film and the third vibration film are coaxially arranged, and the third vibration film and the second vibration film are opposite and connected;

the shell is provided with an installation cavity, the sound generating device is installed in the installation cavity, a first sound outlet hole and a second sound outlet hole are respectively formed in the shell corresponding to the first vibration unit and the second vibration unit, and the first sound outlet hole and the second sound outlet hole are communicated with the installation cavity;

The electronic equipment is provided with an external-playing mode and an earphone mode, and in the external-playing mode, the first vibrating diaphragm, the second vibrating diaphragm and the third vibrating diaphragm vibrate together; in the earphone mode, the second vibrating diaphragm and the third vibrating diaphragm vibrate in the same direction.

Optionally, the housing has a front face, a back face and a top side face, the front face is provided with a display portion, the back face is opposite to the front face, and the top side face is located between the back face and the front face;

the first sound outlet is arranged on the back surface, the top side surface or the joint of the back surface and the top side surface, and the second sound outlet is arranged on the front surface or the joint of the front surface and the top side surface.

Optionally, the sound outlet area of the first sound outlet hole is larger than the sound outlet area of the second sound outlet hole.

Optionally, the sound generating device further comprises a magnetic circuit system, wherein the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap, and the first magnetic gap is positioned outside the second magnetic gap;

the first vibrating diaphragm and the second vibrating diaphragm are arranged on one side of the magnetic circuit system, the third vibrating diaphragm is arranged on one side, deviating from the first vibrating diaphragm and the second vibrating diaphragm, of the magnetic circuit system, the first vibrating unit further comprises a first voice coil and a second voice coil, one side of the first voice coil is inserted into the first magnetic gap, the other side of the first voice coil is connected with the first vibrating diaphragm, the second voice coil is inserted into the second magnetic gap, the second voice coil is connected with the second vibrating diaphragm and/or the third vibrating diaphragm, the third vibrating diaphragm is driven to vibrate in the same direction, and the magnetic circuit system is provided with a through hole for connecting the third vibrating diaphragm with the second vibrating diaphragm.

Optionally, the magnetic circuit system comprises a side magnetic part, an inner magnetic part, a center magnetic part and a yoke plate,

the yoke plate comprises a flat plate-shaped body part, the side magnetic part, the inner magnetic part and the central magnetic part are paved on the same side of the body part at intervals from outside to inside, the first magnetic gap is formed between the side magnetic part and the inner magnetic part, and the second magnetic gap is formed between the inner magnetic part and the central magnetic part;

the yoke plate is provided with a through hole for connecting the third vibrating diaphragm and the second vibrating diaphragm.

Optionally, the second voice coil includes two flat voice coils that are spaced apart, an axial direction of the flat voice coil is perpendicular to a vibration direction of the first vibration unit, one side of the flat voice coil is fixed to the second diaphragm, and the other side of the flat voice coil is fixed to the third diaphragm, so as to drive the second diaphragm and the third diaphragm to vibrate in the same direction;

or, the second voice coil is coaxially arranged with the first voice coil, one end of the second voice coil is connected with one of the second vibrating diaphragm and the third vibrating diaphragm, and the other end of the second voice coil is connected with the other of the second vibrating diaphragm and the third vibrating diaphragm through a connecting piece.

Optionally, the outer periphery of the second diaphragm is connected to the inner periphery of the first diaphragm;

The outer side of the first vibrating diaphragm is provided with a first folding ring part, the outer side of the second vibrating diaphragm is provided with a second folding ring part, and the compliance of the second folding ring part is larger than that of the first folding ring part.

Optionally, the first diaphragm has a first effective radiation area Sd1, the second diaphragm has a second effective radiation area Sd2, and the third diaphragm has a third effective radiation area Sd3, sd 3/(s2+s1) +.0.4.

Optionally, the second diaphragm has a second effective radiation area Sd2, and the third diaphragm has a third effective radiation area Sd3,0.95 less than or equal to Sd3/Sd2 less than or equal to 1.05.

Optionally, the shell comprises a first shell and a second shell which are connected with each other, the first shell is provided with a first limiting step, the first vibration unit is connected with the first limiting step, a first front sound cavity is formed between the first vibration unit and the first shell, and the first front sound cavity is communicated with the first sound outlet;

the second shell is provided with a second limiting step, the second vibration unit is connected to the second limiting step, a second front sound cavity is formed among the second vibration unit, the second shell and part of the shell, and the second front sound cavity is communicated with the second sound outlet hole;

And a rear sound cavity is formed among the first shell, the sound generating device and the second shell.

According to the technical scheme, the sound generating device is arranged in the mounting cavity, so that the mounting cavity is divided into the first front sound cavity and the second front sound cavity, the sound generating device comprises a first vibration unit and a second vibration unit, the first vibration unit and the second vibration unit are arranged in a back-to-back mode, the outer contour dimension of the first vibration unit is larger than that of the second vibration unit, the first vibration unit comprises a first vibration film and a second vibration film, the first vibration film is arranged on the periphery of the second vibration film in a surrounding mode, the second vibration unit comprises a third vibration film, the first vibration film, the second vibration film and the third vibration film are coaxially arranged, and the third vibration film and the second vibration film are opposite and are connected; the shell is provided with an installation cavity, the sound generating device is installed in the installation cavity, the shell is provided with a first sound outlet hole and a second sound outlet hole corresponding to the first vibration unit and the second vibration unit respectively, and the first sound outlet hole and the second sound outlet hole are communicated with the installation cavity.

The electronic equipment is provided with an external-playing mode and an earphone mode, in the external-playing mode, the first vibrating diaphragm, the second vibrating diaphragm and the third vibrating diaphragm vibrate together, the first vibrating diaphragm and the second vibrating diaphragm are used as a large vibrating diaphragm for vibrating and sounding, the third vibrating diaphragm is used for balancing the internal air pressure of the sounding device, the vibration stability of the first vibrating diaphragm and the second vibrating diaphragm is guaranteed, the tone quality of the sounding device is improved, and therefore the external-playing effect of the electronic equipment is guaranteed; in the earphone mode, the second vibrating diaphragm and the third vibrating diaphragm vibrate in the same direction, the third vibrating diaphragm is opposite to the second vibrating diaphragm and is connected with the second vibrating diaphragm, the second vibrating diaphragm and the third vibrating diaphragm vibrate synchronously, the amplitude is the same, and an acoustic dipole is formed, so that the cancellation effect of the second vibrating diaphragm and the third vibrating diaphragm is improved in the earphone mode, the cancellation of far-field leakage is guaranteed, and the risk of acoustic leakage of electronic equipment is reduced.

Drawings

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

FIG. 1 is a side cross-sectional view of an embodiment of an electronic device of the present invention;

FIG. 2 is a schematic view of an angle structure of the electronic device in FIG. 1;

FIG. 3 is a schematic view of another angle structure of the electronic device in FIG. 1;

FIG. 4 is a schematic view of an angle of the sound generating device of the electronic device in FIG. 1;

FIG. 5 is a schematic view of the sound generating apparatus of FIG. 1 at another angle;

FIG. 6 is an exploded view of the sound emitting device of FIG. 1;

FIG. 7 is a side cross-sectional view of the sound emitting device of FIG. 1 taken at an angle;

FIG. 8 is a side cross-sectional view of the sound emitting device of FIG. 1 taken at another angle;

FIG. 9 is a schematic view of the interior of the sound emitting device of FIG. 1;

FIG. 10 is an exploded view of the magnetic circuit system of the sound emitting device of FIG. 1;

FIG. 11 is a schematic view of a conductive support in the sound device of FIG. 1;

FIG. 12 is an exploded view of a sound emitting device in another embodiment of the electronic device of the present invention;

FIG. 13 is a side cross-sectional view of the sound emitting device of FIG. 12 taken at an angle;

fig. 14 is a side cross-sectional view of the sound emitting device of fig. 12 taken at another angle.

Reference numerals illustrate:

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

Detailed Description

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

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

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

The invention provides electronic equipment which can be terminal equipment such as a mobile phone, a tablet personal computer and the like.

In an embodiment of the present invention, as shown in fig. 1 to 7, the electronic device includes:

the sound generating device 100 comprises a first vibration unit 120 and a second vibration unit 130, wherein the first vibration unit 120 and the second vibration unit 130 are oppositely arranged, the outer contour dimension of the first vibration unit 120 is larger than that of the second vibration unit 130, the first vibration unit 120 comprises a first vibration film 121 and a second vibration film 122, the first vibration film 121 is annularly arranged on the periphery of the second vibration film 122, the second vibration unit 130 comprises a third vibration film 131, the first vibration film 121, the second vibration film 122 and the third vibration film 131 are coaxially arranged, and the third vibration film 131 and the second vibration film 122 are opposite and connected;

The shell 100, the shell 100 has a mounting cavity 280, the sound generating device 100 is mounted in the mounting cavity 280, and the shell 100 is provided with a first sound outlet 240 and a second sound outlet 250 corresponding to the first vibration unit 120 and the second vibration unit 130 respectively, and the first sound outlet 240 and the second sound outlet 250 are both communicated with the mounting cavity 280;

the electronic device has an external mode and an earphone mode, and in the external mode, the first diaphragm 121, the second diaphragm 122 and the third diaphragm 131 vibrate together to sound; in the earpiece mode, the second diaphragm 122 and the third diaphragm 131 vibrate in the same direction.

Specifically, the sound generating device 100 is installed in the installation cavity 280, so that the installation cavity 280 is divided into two front sound cavities, and the sound generating device 100 is provided with a first vibration unit 120 and a second vibration unit 130 which are arranged back to each other, the first vibration unit 120 faces the first front sound cavity 262, the second vibration unit 130 faces the second front sound cavity 272, the first sound outlet 240 is arranged corresponding to the first vibration unit 120 and is communicated with the installation cavity 280, that is, the first sound outlet 240 is arranged corresponding to the first front sound cavity 262, the second sound outlet 250 is arranged corresponding to the second vibration unit 130 and is communicated with the installation cavity 280, that is, the second sound outlet 250 is arranged corresponding to the second front sound cavity 272, so that sound waves of the first vibration unit 120 are radiated by the first sound outlet 240 through the first front sound cavity 262, and sound waves of the second vibration unit 130 are radiated by the second sound outlet 250 through the second front sound cavity 272.

This electronic equipment has mode and earphone mode of putting outward, put the mode outward, first vibrating diaphragm 121, second vibrating diaphragm 122 and third vibrating diaphragm 131 vibrate the sound production jointly, first vibrating diaphragm 121 and second vibrating diaphragm 122 are located same one side, first vibrating diaphragm 121 and second vibrating diaphragm 122 can regard as a big vibrating diaphragm vibration sound production this moment, third vibrating diaphragm 131 plays the effect of the atmospheric pressure in balanced vibration space, guarantee the vibration stability of first vibrating diaphragm 121 and second vibrating diaphragm 122 to guarantee the effect of putting outward when putting outward the mode, guarantee electronic equipment's sound production effect. Preferably, the amplitudes of the first diaphragm 121, the second diaphragm 122, and the third diaphragm 131 are the same.

In the earphone mode, the second vibrating diaphragm 122 and the third vibrating diaphragm 131 vibrate in the same direction, and because the third vibrating diaphragm 131 is opposite to and connected with the second vibrating diaphragm 122, when the second vibrating diaphragm 122 and the third vibrating diaphragm 131 vibrate in the same direction, the vibration is synchronous, the vibration amplitude is the same, and an acoustic dipole is formed, so that the cancellation effect of the second vibrating diaphragm and the third vibrating diaphragm is improved in the earphone mode, the cancellation of far-field leakage is ensured, and the risk of acoustic leakage of electronic equipment is reduced.

In the present embodiment, the housing 100 includes a first housing 260 and a second housing 270 connected to each other, the first housing 260 having a first limiting step 261, the first vibration unit 120 being connected to the first limiting step 261, a first front acoustic chamber 262 being formed between the first vibration unit 120 and the first housing 260, the first front acoustic chamber 262 being in communication with the first sound outlet 240; the second housing 270 is provided with a second limiting step 271, the second vibration unit 130 is connected to the second limiting step 271, a second front sound cavity 272 is formed among the second vibration unit 130, the second housing 270 and part of the casing 100, and the second front sound cavity 272 is communicated with the second sound outlet 250; a rear sound cavity 281 is formed between the first housing 260, the sound generating device 100 and the second housing 270.

Specifically, the first housing 260 fixes the first vibration unit 120 through the first limiting step 261, thereby fixing one side of the sound generating device 100, and a first front sound cavity 262 is formed between the first vibration unit 120 and the first housing 260, and the first front sound cavity 262 is communicated with the first sound outlet 240, so that sound waves of the first vibration unit 120 are emitted through the first front sound cavity 262 and the first sound outlet 240; the second housing 270 fixes the second vibration unit 130 through the second limiting step 271, thereby fixing the other side of the sound generating apparatus 100, and sound waves of the second vibration unit 130 are emitted from the second sound outlet 250 through the second front sound chamber 272. And a rear sound cavity 281 is formed between the first housing 260, the sound emitting device 100, and the second housing 270, thereby further improving the sound emitting effect of the sound emitting device 100.

In this embodiment, the first sound outlet 240 and the second sound outlet 250 are separately disposed on two surfaces of the housing 100 that are disposed adjacently or disposed opposite to each other, so as to improve the sound effect of the electronic device.

And preferably, the sound emitting area of the first sound emitting hole 240 is larger than that of the second sound emitting hole 250. Optionally, the second sound outlet 250 is configured as a micro-hole or a slit, so that in the external mode, the second vibration unit 130 radiates less sound to the outside, thereby reducing the cancellation effect on the sound of the first vibration unit 120 and improving the sound output effect of the sound generating device 100 in the external mode.

According to the technical scheme, the sound generating device 100 is arranged in the mounting cavity 280, the sound generating device 100 comprises a first vibration unit 120 and a second vibration unit 130, the first vibration unit 120 and the second vibration unit 130 are arranged in a back-to-back mode, the outer contour dimension of the first vibration unit 120 is larger than that of the second vibration unit 130, the first vibration unit 120 comprises a first vibration film 121 and a second vibration film 122, the first vibration film 121 is arranged on the periphery of the second vibration film 122 in a surrounding mode, the second vibration unit 130 comprises a third vibration film 131, the first vibration film 121, the second vibration film 122 and the third vibration film 131 are coaxially arranged, and the third vibration film 131 and the second vibration film 122 are opposite and connected; the casing 100 has a mounting cavity 280, the sound generating device 100 is mounted in the mounting cavity 280, and the casing 100 is provided with a first sound outlet 240 and a second sound outlet 250 corresponding to the first vibration unit 120 and the second vibration unit 130, and the first sound outlet 240 and the second sound outlet 250 are both communicated with the mounting cavity 280.

The electronic equipment is provided with an external mode and a receiver mode, in the external mode, the first diaphragm 121, the second diaphragm 122 and the third diaphragm 131 vibrate together to produce sound, and at the moment, the first diaphragm 121 and the second diaphragm 122 can be regarded as a large diaphragm, so that the external effect in the external mode is ensured, and the sound producing effect of the electronic equipment is ensured; preferably, the amplitudes of the first diaphragm 121, the second diaphragm 122, and the third diaphragm 131 are the same. In the earphone mode, the second vibrating diaphragm 122 and the third vibrating diaphragm 131 vibrate synchronously, the third vibrating diaphragm 131 and the second vibrating diaphragm 122 are opposite and connected, so that the second vibrating diaphragm 122 and the third vibrating diaphragm 131 vibrate in the same direction, the driving force is the same, the amplitude is the same, and an acoustic dipole is formed, so that the cancellation effect of the second vibrating diaphragm 122 and the third vibrating diaphragm is improved in the earphone mode, the cancellation of far-field leakage is guaranteed, and the risk of acoustic leakage of electronic equipment is reduced. Therefore, the sounding effect of the electronic equipment in the external-playing mode can be guaranteed, and the risk of sounding leakage of the electronic equipment in the earphone mode can be reduced.

In the present embodiment, the electronic device is taken as an example of a mobile phone, but the present invention is not limited thereto. The housing 100 has a front surface 210, a back surface 220, and a top side surface 230, the front surface 210 being provided with a display portion, the back surface 220 being disposed opposite the front surface 210, the top side surface 230 being located between the back surface 220 and the front surface 210.

The relative positional relationship between the first sound outlet 240 and the second sound outlet 250 is various, for example, in one embodiment, the second sound outlet 250 is disposed at a junction between the front surface 210 and the top side 230, and the first sound outlet 240 is disposed at a junction between the back surface 220 and the top side 230. In another embodiment, the second sound outlet 250 is disposed at the junction between the front surface 210 and the top side surface 230, and the first sound outlet 240 is disposed at the top side surface 230. Alternatively, in yet another embodiment, the first sound outlet 240 is disposed on the top side 230, and the second sound outlet 250 is disposed on the front side 210. Therefore, the second sound outlet 250 and the ear coupling effect in the earphone mode can be guaranteed, so that the user can clearly answer the sound emitted from the second sound outlet 250, the call answering effect of the user is improved, and the better sound dipole effect can be achieved.

Preferably, the second sound outlet 250 is disposed at the junction of the front surface 210 and the top side surface 230, and the first sound outlet 240 is disposed at the top side surface 230. So can guarantee that the earphone mode time, second play sound hole 250 is effectual with the ear coupling for the user can clearly answer the sound that sends from second play sound hole 250, promotes user's conversation and answers the effect, can also reduce the occupation space of second play sound hole 250 in front 210. In the external playing mode, the sound wave of the first vibration unit 120 is emitted through the first sound outlet 240 arranged on the top side 230 of the electronic device, the sound is smooth, the second sound outlet 250 is not needed, high-speed airflow noise and distortion are not caused, the sound quality is better, the distortion is lower, and therefore the quality of the external playing sound is improved.

Specifically, in an embodiment, the sound generating device 100 further includes a magnetic circuit system 110, where the magnetic circuit system 110 is formed with a first magnetic gap 111 and a second magnetic gap 112, and the first magnetic gap 111 is located outside the second magnetic gap 112;

the first vibration unit 120 includes a first voice coil 123 and a second voice coil 124, one side of the first voice coil 123 is inserted into the first magnetic gap 111, the other side is connected with the first diaphragm 121, the second voice coil 124 is inserted into the second magnetic gap 112, and the second voice coil 124 is connected with the second diaphragm 122 and/or the third diaphragm 131, and simultaneously drives the third diaphragm 131 and the second diaphragm 122 to vibrate in the same direction.

One side of the first voice coil 123 is inserted into the first magnetic gap 111, and the other side is connected to the first diaphragm 121, so as to drive the first diaphragm 121 to vibrate and sound, and in this embodiment, the first voice coil 123 is configured as an annular voice coil.

The second voice coil 124 may be connected to the second diaphragm 122 and the third diaphragm 131 at both sides, or may be connected to one of them, and connected to the other through the connecting member 125. When the second voice coil 124 is connected with the second diaphragm 122 and is connected with the third diaphragm 131 through the connecting piece 125, the second voice coil 124 drives the second diaphragm 122 to vibrate and sound, and then drives the third diaphragm 131 to vibrate along with the second diaphragm in the same direction, so that the second diaphragm 122 and the third diaphragm 131 vibrate in the same direction; when the second voice coil 124 is connected with the third diaphragm 131 only and is connected with the second diaphragm 122 through the connecting piece 125, the second voice coil 124 drives the third diaphragm 131 to vibrate and sound, and then drives the second diaphragm 122 to vibrate along with the third diaphragm 131 in the same direction, so that the second diaphragm 122 and the third diaphragm 131 vibrate in the same direction; so that when the second voice coil 124 drives one of the two to vibrate, the other can also vibrate synchronously therewith. Alternatively, the two sides of the second voice coil 124 are respectively connected with the second diaphragm 122 and the third diaphragm 131, that is, the second voice coil 124 can drive the second diaphragm 122 and the third diaphragm 131 to vibrate in the same direction. That is, the second diaphragm 122 and the third diaphragm 131 are driven by the same voice coil, compared with the prior art, the second diaphragm 122 and the third diaphragm 131 only share the magnetic circuit 110, but are respectively driven by two voice coils, so that the consistency of TS parameters of the second diaphragm 122 and the third diaphragm 131 can be improved, the counteracting effect of the second diaphragm 122 and the third diaphragm 131 can be improved, the whole thickness of the magnetic circuit 110 can be reduced, the thickness of the sound generating device 100 can be reduced, and the thickness of the electronic equipment can be reduced.

In an embodiment, the outer periphery of the second diaphragm 122 and the inner periphery of the first diaphragm 121 are both fixed above the magnetic circuit 110 through a bracket. That is, the second diaphragm 122 is not directly connected with the first diaphragm 121, so that the vibration between the first diaphragm 121 and the second diaphragm 122 is not mutually affected, and when the earphone mode is reduced, the influence of the first diaphragm 121 on the vibration of the second diaphragm 122 is further improved, the cancellation effect of the second diaphragm 122 and the third diaphragm 131 is further improved, the cancellation of far-field leakage sound is ensured, and the call privacy is improved.

In another embodiment, referring to fig. 5 to 9 and 12 to 14, the outer periphery of the second diaphragm 122 is connected to the inner periphery of the first diaphragm 121. That is, the first diaphragm 121 is configured as an annular diaphragm, the first diaphragm 121 is directly connected with the second diaphragm 122, the first annular part 121a is arranged at the outer side of the first diaphragm 121, the second annular part 122a is arranged at the outer side of the second diaphragm 122, and the compliance of the second annular part 122a is greater than that of the first annular part 121a, so that the first diaphragm and the second annular part can be used as one large diaphragm for vibration sounding, and the second diaphragm can be used as two small diaphragms for respective vibration sounding, thereby improving the flexibility of the sounding device 100 and further improving the sounding effect of the sounding device 100. Specifically, the greater the compliance, the greater its flexibility and the easier it is to deform. The compliance of the second ring portion 122a is greater than that of the first ring portion 121a, so in the vibration process of the second diaphragm 122, the first ring portion 121a is less prone to radial movement, so that in the earpiece mode, the first diaphragm 121 is less prone to be driven to vibrate by the vibration of the second diaphragm 122, and in the earpiece mode, the sound generating device 100 has low volume and low power, and the amplitudes of the second diaphragm 122 and the third diaphragm 131 are small, so that the first diaphragm 121 is basically free of vibration or has extremely small amplitude, and the silencing effect of the sound generating device 100 in the earpiece mode is not affected basically.

Preferably, the compliance of the first collar portion 121a is greater than or equal to 1.5mm/N, and the compliance of the second collar portion 122a is greater than 2 times the compliance of the first collar portion 121 a. Specifically, if the compliance of the first ring portion 121a is less than 1.5mm/N, the compliance of the first diaphragm 121 is too small, which makes it difficult for the first diaphragm 121 to accommodate low-amplitude vibrations, and affects the sound production effect of the electronic device in the play mode. And the compliance of the second ring portion 122a is greater than 2 times that of the first ring portion 121a, so as to ensure that the compliance of the second ring portion 122a is sufficiently great, further reduce the driving of the second diaphragm 122 to the first diaphragm 121 by the vibration of the second diaphragm 122 in the earphone mode, and reduce the vibration interference of the first diaphragm 121 to the second diaphragm 122.

To ensure that the compliance of the second collar portion 122a is greater than the compliance of the first collar portion 121a, in one embodiment, the modulus of elasticity of the material of the first collar portion 121a is greater than the modulus of elasticity of the material of the second collar portion 122 a. Specifically, the greater the modulus of elasticity of the material, the greater the stiffness of the material, and the less the elastic deformation, and correspondingly, the less the flexibility and compliance of the material. The first and second ring portions 121a and 122a are made of different materials, and the elastic modulus of the material of the first ring portion 121a is greater than that of the material of the second ring portion 122a, so that the compliance of the second ring portion 122a is ensured to be greater than that of the first ring portion 121 a. The material of the first ring portion 121a and the second ring portion 122a may be one or more of PET, PEI, PEN, PEEK and the like.

In another embodiment, the aspect ratio of the turns of the second turn-around portion 122a is smaller than the aspect ratio of the turns of the first turn-around portion 121 a. That is, when the widths of the ring of the second ring portion 122a and the ring of the first ring portion 121a are the same, the degree of concavity or convexity of the ring of the second ring portion 122a is greater than that of the ring of the first ring portion 121a, so as to improve the compliance of the second ring portion 122a, reduce the driving of the first diaphragm 121 by the vibration of the second diaphragm 122 in the earpiece mode, and reduce the vibration interference of the first diaphragm 121 to the second diaphragm 122.

Further, the third diaphragm 131 includes a third ring portion 131a and a third reinforcing portion 131b provided on the third ring portion 131a, and the compliance of the third ring portion 131a is the same as that of the first ring portion 121 a. When the sound generating device is in the outward-playing mode, the vibration consistency of the third diaphragm 131 and the first diaphragm 121 is guaranteed, and the vibration interference of the third diaphragm 131 to the first diaphragm 121 is reduced. Optionally, the compliance of the second collar portion 122a is greater than the compliance of the third collar portion 131 a.

When the first diaphragm 121 is directly connected to the second diaphragm 122, in an embodiment, referring to fig. 5 to 9 and fig. 12 to 14 again, the first diaphragm 121 includes a first ring-shaped portion 121a and an annular reinforcing portion 121b disposed on the first ring-shaped portion 121a, the second diaphragm 122 includes a second ring-shaped portion 122a and an inner reinforcing portion 122b disposed on the second ring-shaped portion 122a, an inner periphery of the annular reinforcing portion 121b is connected to an outer periphery of the second ring-shaped portion 122a, an outer periphery of the annular reinforcing portion 121b is connected to an inner periphery of the first ring-shaped portion 121a, and the inner reinforcing portion 122b is disposed in an intermediate region of the second ring-shaped portion 122 a. Specifically, the first collar portion 121a is formed at the outermost periphery for vibration deformation of the first diaphragm 121. The annular reinforcing portion 121b is used for adjusting the structural strength of the first diaphragm 121, and improving the sound production effect of the first diaphragm 121. Alternatively, the first voice coil 123 is connected to the annular reinforcing portion 121b, so as to drive the first diaphragm 121 to vibrate and sound, i.e., the outer periphery of the annular reinforcing portion 121b overlaps the inner periphery of the first collar portion 121a toward one side of the first voice coil 123. Further, the outer periphery of the second ring portion 122a is overlapped with the inner periphery of the annular reinforcement portion 121b, so as to connect the first diaphragm 121 and the second diaphragm 122, the second ring portion 122a is used for vibration deformation of the second diaphragm 122, and the inner periphery thereof is provided with the inner reinforcement portion 122b, so as to adjust the strength of the second diaphragm 122 and improve the vibration effect of the second diaphragm 122. Further alternatively, the second voice coil 124 is connected to the inner reinforcement portion 122b, so as to drive the second diaphragm 122 to vibrate and sound, that is, the outer periphery of the inner reinforcement portion 122b overlaps the inner periphery of the second collar portion 122a toward one side of the second voice coil 124. And the first diaphragm 121 and the second diaphragm 122 are directly connected, and the inner reinforcement portion 122b and the annular reinforcement portion 121b are located in the same plane, which also contributes to the thickness reduction of the entire sound generating device 100.

Referring to fig. 7, 8, 13 and 14, in an embodiment, the first ring-folding portion 121a and the second ring-folding portion 122a are concavely disposed toward the magnetic circuit 110, so as to further reduce the overall thickness of the sound generating device 100. Of course, in other embodiments, the first ring portion 121a and the second ring portion 122a may be both protruding in a direction away from the magnetic circuit 110, or one of the first ring portion 121a and the second ring portion 122a may be concavely disposed toward the magnetic circuit 110, and the other may be protruding in a direction away from the magnetic circuit 110, which is not limited herein.

To further ensure the sound effect of the electronic device in the play mode, i.e. the sound generating device 100 in the speaker mode, in an embodiment, the outer dimension of the first vibration unit 120 is larger than the outer dimension of the second vibration unit 130. Specifically, the first effective radiation area of the first diaphragm 121 is defined as Sd1, the second effective radiation area of the second diaphragm 122 is defined as Sd2, and the third effective radiation area of the third diaphragm 131 is defined as Sd3, so that the outer dimension of the first vibration unit 120 is greater than that of the second vibration unit 130, which is more beneficial to setting that the sum of the effective radiation areas of the first diaphragm 121 and the second diaphragm 122 is greater than that of the third diaphragm 131, that is, sd 1+sd 2 > Sd3, so that the cancellation of the second vibration unit 130 to the first vibration unit 120 in the external mode is reduced, thereby improving the sounding effect of the electronic device in the external mode.

Further, sd 3/(Sd2+Sd1) is less than or equal to 0.4. That is, the effective radiation area of the second vibration unit 130 is less than or equal to 40% of the effective radiation area of the first vibration unit 120, so that the area of the second vibration unit 130 is further reduced, and further, the cancellation of the second vibration unit 130 to the first vibration unit 120 in the external mode is reduced, thereby ensuring the sound producing effect of the sound producing device 100 in the external mode.

In another embodiment, 0.95.ltoreq.Sd3/Sd2.ltoreq.1.05. I.e. the second effective radiating area of the second diaphragm 122 is approximately equal to the third effective radiating area of the third diaphragm 131. In the earphone mode, the vibration of the first diaphragm 121 is extremely small and negligible, and the second diaphragm 122 and the third diaphragm 131 vibrate in the same direction, so that the effective radiation area of the second diaphragm 122 is approximately equal to that of the third diaphragm 131, which is conducive to the second diaphragm 122 and the third diaphragm 131 forming a perfect acoustic dipole, thereby further improving the cancellation effect of the second diaphragm 122 and the third diaphragm 131 in the earphone mode. Preferably, the second effective radiating area of the second diaphragm 122 is equal to the third effective radiating area of the third diaphragm 131, so as to further help form a perfect acoustic dipole between the second diaphragm 122 and the third diaphragm 131, thereby further improving the cancellation effect of the second diaphragm 122 and the third diaphragm 131 in the earpiece mode.

Referring to fig. 1 to 6, in an embodiment, the second voice coil 124 includes two flat voice coils 124a spaced apart from each other, the axial direction of the flat voice coils 124a is perpendicular to the vibration direction of the first vibration unit 120, one side of the flat voice coils 124a is fixed to the second diaphragm 122, and the other side is fixed to the third diaphragm 131 to drive the second diaphragm 122 and the third diaphragm 131 to vibrate in the same direction. Specifically, the axial direction of the flat voice coil 124a is perpendicular to the vibration direction of the first vibration unit 120, that is, the flat voice coil 124a is placed in the arrangement direction of the first vibration unit 120 and the second vibration unit 130, the size of the magnetic circuit portion for driving the flat voice coil 124a can be reduced, and thus the size of the sound generating apparatus can be reduced. The two flat voice coils 124a are arranged at intervals and correspondingly inserted into the second magnetic gap 112, so that the second voice coil 124 is convenient to connect the second diaphragm 122 and the third diaphragm 131 at the same time, and the utilization rate of the magnetic circuit is improved. And the flat voice coil 124a is connected with the second diaphragm 122 and the third diaphragm 131 at the same time, that is, the flat voice coil 124a directly drives the second diaphragm 122 and the third diaphragm 131 to vibrate, so that a connecting piece 125 is not required to be additionally arranged to connect the second diaphragm 122 and the third diaphragm 131, which is helpful for simplifying the structure of the sound generating device 100, and can effectively ensure that the second diaphragm 122 and the third diaphragm 131 vibrate simultaneously and in the same direction. It will be appreciated that in this embodiment, the magnetic circuit 110 has a through hole that bypasses the flat voice coil 124 a.

The flat voice coil 124a includes two opposite long sides and two short sides connecting the two long sides, one long side of the flat voice coil 124a is connected to the second diaphragm 122, the other long side is connected to the third diaphragm 131, and the flat voice coil 124a is used for driving the second diaphragm 122 and the third diaphragm 131 to vibrate in the same direction. Specifically, the long side of the flat voice coil 124a is used for inserting the second magnetic gap 112, so that on one hand, the acting length of the flat voice coil 124a and the second magnetic gap 112 is increased, the magnetic field utilization rate is improved, and on the other hand, the connection length between the flat voice coil 124a and the second diaphragm 122 (the third diaphragm 131) is increased, so that the contact area between the flat voice coil 124a and the second diaphragm 122 (the third diaphragm 131) is increased, the uniformity and stability of the second diaphragm 122 (the third diaphragm 131) during vibration are improved, and the sounding effect of the sounding device 100 is improved.

Preferably, the flat voice coil 124a is bonded to the second diaphragm 122. Thereby facilitating the fixation of the flat voice coil 124a and the second diaphragm 122 and ensuring the mounting stability of the two. In another embodiment, the flat voice coil 124a is bonded to the third diaphragm 131. Thereby facilitating the fixation of the flat voice coil 124a and the third diaphragm 131 and ensuring the mounting stability of both.

Referring to fig. 4 to 5 and 13 to 14, in another embodiment, the second voice coil 124 is disposed coaxially with the first voice coil 123, that is, the second voice coil 124 is configured as an annular voice coil, where the second voice coil 124 may be connected to only one of the second diaphragm 122 or the third diaphragm 131, and connected to the other through the connecting member 125 and drives the other diaphragm to vibrate.

In an embodiment, one end of the second voice coil 124 is connected to one of the second diaphragm 122 and the third diaphragm 131, and the other end is connected to the other of the second diaphragm 122 and the third diaphragm 131 through the connecting piece 125, so that the second voice coil 124 can drive the second diaphragm 122 and the third diaphragm 131 to vibrate in the same direction at the same time. The second voice coil 124 may be connected to the second diaphragm 122, where one side of the second voice coil 124 near the second diaphragm 122 is connected to the second diaphragm 122, the other side is connected to the connecting piece 125, and one side of the connecting piece 125 far from the second voice coil 124 is connected to the third diaphragm 131; or the second voice coil 124 is connected with the third diaphragm 131, at this time, one side of the second voice coil 124 close to the third diaphragm 131 is connected with the third diaphragm 131, the other side is connected with the connecting piece 125, and one side of the connecting piece 125 far away from the second voice coil 124 is connected with the second diaphragm 122. It will be appreciated that the magnetic circuit 110 is provided with a through hole for the bypass connector 125.

Further, the second voice coil 124 has two opposite long axis sides and a short axis side connecting the two long axis sides, the connection member 125 includes two, and the two connection members 125 are respectively connected with the two long axis sides. Specifically, the connecting piece 125 is connected to the long axis of the second voice coil 124 and extends along the extending direction of the long axis, so as to increase the connection length between the connecting piece 125 and the second voice coil 124, further improve the stability of the connecting piece 125 and the second voice coil 124, and by taking the connection of the connecting piece 125 between the second voice coil 124 and the third diaphragm 131 as an example, the connection of the connecting piece 125 and the long axis of the second voice coil 124 can also increase the connection length between the second voice coil 124 and the third diaphragm 131, thereby increasing the connection area between the second voice coil 124 and the third diaphragm 131, improving the uniformity and stability of the third diaphragm 131 during vibration, and further ensuring that the TS parameters of the second diaphragm 122 and the third diaphragm 131 tend to be consistent.

Preferably, the second voice coil 124 is connected to the second diaphragm 122, and the connecting member 125 is connected between the second voice coil 124 and the third diaphragm 131, so as to facilitate the design and assembly of the magnetic circuit system 110. Optionally, the second voice coil 124, the second diaphragm 122, the connecting piece 125 and the third diaphragm 131 are bonded together, so that the connection stability can be ensured, and the operation is convenient.

Further, the connecting member 125 includes a main body section 125a extending along the arrangement direction of the second diaphragm 122 and the third diaphragm 131, and bending sections 125b disposed at two ends of the main body section 125a, wherein one of the two bending sections 125b is fixed to the second voice coil 124, and the other is fixed to the third diaphragm 131 or the second diaphragm 122. Specifically, the connecting piece 125 extends along the arrangement direction of the second diaphragm 122 and the third diaphragm 131 in the width direction, so that opposite sides of the connecting piece 125 in the width direction can be respectively abutted against the second voice coil 124 and the third diaphragm 131, connection stability of the three is guaranteed, and stability of vibration of the third diaphragm 131 is improved, the connecting piece 125 comprises a main body section 125a and bending sections 125b arranged on opposite sides of the main body section 125a, and the two bending sections 125b are respectively used for connecting the second voice coil 124 and the third diaphragm 131, so that contact areas of the second voice coil 124 and the connecting piece 125, contact areas of the third diaphragm 131 and the connecting piece 125 are increased, and installation stability is improved.

In the sound generating device 100 of the present application, the first magnetic gap 111 and the second magnetic gap 112 are disposed side by side in a direction perpendicular to the vibration direction of the first vibration unit 120, so that the first voice coil 123 and the second voice coil 124 are disposed side by side in a direction perpendicular to the vibration direction of the first vibration unit 120, the overall thickness of the magnetic circuit system 110 is reduced, and the overall thickness of the sound generating device 100 is further reduced.

In one embodiment, the magnetic circuit 110 includes a side magnetic part, an inner magnetic part, and a center magnetic part; the center magnetic part, the inner magnetic part and the side magnetic part are sequentially arranged from inside to outside, one side, close to the first vibration unit 120, of the inner magnetic part and the center magnetic part is provided with a first magnetic conduction plate which is integrally formed, one side, close to the second vibration unit 130, of the side magnetic part and the inner magnetic part is provided with a second magnetic conduction plate which is integrally formed, a first magnetic gap 111 is formed between the side magnetic part and the first magnetic conduction plate, and a second magnetic gap 112 is formed between the second magnetic conduction plate and the center magnetic part. Further, a side magnetic plate is arranged on one side of the side magnetic part, which is close to the first vibration unit 120, and a first magnetic gap 111 is formed between the side magnetic plate and the first magnetic plate; the central magnetic portion is provided with a central magnetic conductive plate on a side close to the second vibration unit 130, and a second magnetic gap 112 is formed between the central magnetic conductive plate and the second magnetic conductive plate. It will be appreciated that the first magnetically permeable plate has a through hole that bypasses the second voice coil 124.

Referring to fig. 6, 9 and 10, in one embodiment, the magnetic circuit 110 includes a side magnetic portion 113, an inner magnetic portion 114, a center magnetic portion 115 and a yoke plate 116;

the yoke plate 116 includes a flat plate-shaped main body 116a, the side magnetic portion 113, the inner magnetic portion 114, and the center magnetic portion 115 are disposed on the same side of the main body 116a from outside to inside at intervals, a first magnetic gap 111 is formed between the side magnetic portion 113 and the inner magnetic portion 114, and a second magnetic gap 112 is formed between the inner magnetic portion 114 and the center magnetic portion 115.

Specifically, the inner magnetic portion 114 is disposed at a distance outside the central magnetic portion 115, and a second magnetic gap 112 is formed between the inner magnetic portion 114 and the central magnetic portion 115, into which the second voice coil 124 is inserted. The side magnetic part 113 is disposed at a distance outside the inner magnetic part 114, and a first magnetic gap 111 is formed between the side magnetic part 113 and the inner magnetic part 114 for inserting the first voice coil 123. The side magnetic part 113, the inner magnetic part 114 and the center magnetic part 115 are arranged on the same side of the main body part 116a of the yoke plate 116 at intervals, that is, the side magnetic part 113, the inner magnetic part 114 and the center magnetic part 115 are arranged in a non-laminated manner in the arrangement direction of the yoke plate 116. Compared with the structure that the side magnetic part 113 and/or the inner magnetic part 114 and/or the central magnetic part 115 are arranged on two opposite sides of the main body part 116a, the overall thickness of the magnetic circuit 110 can be reduced, and the overall thickness of the sound generating device 100 can be further reduced.

In this embodiment, the side magnetic part 113 includes a side magnet 113b provided on the yoke plate 116 and a side magnetic plate 113a provided on the side magnet 113b, the inner magnetic part 114 includes an inner magnet 114b provided on the yoke plate 116 and an inner magnetic plate 114a provided on the inner magnet 114b, the center magnetic part 115 includes a center magnet 115b provided on the yoke plate 116 and a center magnetic plate 115a provided on the center magnet 115b, a second magnetic gap 112 for inserting the second voice coil 124 is formed between the inner magnetic plate 114a and the center magnetic plate 115a, and a first magnetic gap 111 for inserting the first voice coil 123 is formed between the side magnetic plate 113a and the inner magnetic plate 114 a. Further, the side magnet 113b, the inner magnet 114b and the center magnet 115b are magnetized along the vibration direction of the first vibration unit 120, the magnetizing directions of the side magnet 113b and the inner magnet 114b are opposite, and the magnetizing directions of the side magnet 113b and the center magnet 115b are the same, so that when the first voice coil 123 is inserted into the first magnetic gap 111, and when the second voice coil 124 is inserted into the second magnetic gap 112, the cut magnetic induction lines vibrate in the same direction.

And when the second voice coil 124 includes two flat voice coils 124a, the two flat voice coils 124a are correspondingly inserted into the second magnetic gap 112 and are located at two opposite sides of the central magnetic portion 115, and the two flat voice coils 124a are connected in series and have opposite current directions, so that the two flat voice coils 124a can move in the same direction when cutting the magnetic induction lines, and further drive the second diaphragm 122 and the third diaphragm 131 to vibrate synchronously.

Referring again to fig. 6, 9 and 10, in one embodiment, the inner magnetic portion 114 includes a plurality of inner magnetic portions 114, and the plurality of inner magnetic portions 114 are disposed at intervals on the peripheral side of the central magnetic portion 115, and form a second magnetic gap 112 with the central magnetic portion 115, and the second voice coil 124 is inserted into the second magnetic gap 112. And when the second voice coil 124 is configured as the flat voice coil 124a, the second voice coil 124 includes two flat voice coils 124a, and the two flat voice coils 124a are inserted into the second magnetic gap 112 and located at opposite sides of the central magnetic portion 115. This ensures the vibration balance of the second diaphragm 122, avoiding polarization, etc. In other embodiments, the inner magnetic portion 114 may be configured as an annular magnetic portion, the central magnetic portion 115 is disposed at intervals inside the inner magnetic portion 114, and the second magnetic gap 112 is formed between the central magnetic portion 115 and the inner magnetic portion 114.

Preferably, the inner magnetic part 114 has four, four inner magnetic parts 114 are spaced apart from each other on the circumferential side of the central magnetic part 115, and a second magnetic gap 112 is formed between the four inner magnetic parts and the central magnetic part 115, and two flat voice coils 124a are inserted into the second magnetic gap 112 correspondingly and are located on opposite sides of the central magnetic part 115.

Accordingly, the side magnetic portion 113 includes a plurality of side magnetic portions 113, and the plurality of side magnetic portions 113 are provided at intervals on the circumferential side of the inner magnetic portion 114. Specifically, the side magnetic parts 113 include four side magnetic parts 113, which are surrounded on the outer periphery of the inner magnetic part 114 at intervals, and the arrangement axes of the side magnetic parts 113 and the arrangement axes of the inner magnetic part 114 are overlapped, and a first magnetic gap 111 is formed between the inner magnetic part 114 and the side magnetic part 113; or the side magnetic part 113 is configured as an annular magnetic part, the side magnetic part 113 is sleeved on the outer periphery of the inner magnetic part 114 at intervals, and a first magnetic gap 111 is formed between the inner magnetic part 114 and the side magnetic part 113.

Further, the central magnetic portion 115 is configured as a cuboid, the central magnetic portion 115 has a first side and a second side disposed adjacently, and the length of the first side is greater than that of the second side, and the flat voice coil 124a is disposed corresponding to the first side. The length of the first side is greater than that of the second side, and the flat voice coil 124a is disposed corresponding to the first side, thereby improving the effective length of the central magnetic portion 115 and also improving the magnetic circuit utilization.

Referring to fig. 6 to 8 and 12 to 14, in the present embodiment, the inner magnetic portion 114 includes an inner magnetic conductive plate 114a, the central magnetic portion 115 includes a central magnetic conductive plate 115a, the side magnetic portion 113 includes an inner magnetic conductive plate 113a, specifically, the inner magnetic portion 114 includes an inner magnetic body 114b and an inner magnetic conductive plate 114a disposed on a side of the inner magnetic body 114b facing away from the yoke plate 116, the central magnetic portion 115 includes a central magnetic body 115b and a central magnetic conductive plate 115a disposed on a side of the central magnetic body 115b facing away from the yoke plate 116, the side magnetic portion 113 includes a side magnetic body 113b and a side magnetic conductive plate 113a disposed on a side of the side magnetic body 113b facing away from the yoke plate 116, that is, the side magnetic bodies 113b and the central magnetic body 115b are configured as a plurality of plates, the side magnetic bodies 113b are fixedly connected to the side magnetic conductive plate 113a, the inner magnetic body 114b is fixedly connected to the inner magnetic conductive plate 114a, and the central magnetic body 115b is fixedly connected to the central magnetic conductive plate 115a, thereby ensuring the installation stability of the magnetic conductive plates. The inner magnetic conductive plate 114a, the center magnetic conductive plate 115a and the side magnetic conductive plates 113a all play a role of magnetic focusing, so that more magnetic induction lines are focused in the corresponding magnetic gaps. In other embodiments, the inner magnetic conductive plate 114a and the central magnetic conductive plate 115a may be configured as a monolithic magnetic conductive plate, and the inner magnet 114b is used to connect and fix the yoke plate 116, and a first magnetic gap 111 is formed between the magnetic conductive plate and the side magnetic conductive plate 113a, and a through hole 117 for avoiding the second voice coil 124 is formed in the magnetic conductive plate; the yoke plate 116 is configured in a split structure at this time, and includes a first yoke plate provided to the center magnet 115b and a second yoke plate provided to both the inner magnet 114b and the side magnet 113b, with a second magnetic gap 112 formed therebetween.

In one embodiment, when the second voice coil 124 is coaxial with the first voice coil 123, the first voice coil 123 is interposed between the side magnetic conductive plate 113a and the inner magnetic conductive plate 114a, that is, the first voice coil 123 is interposed between the side magnetic conductive plate 113a and the inner magnetic conductive plate 114a by the first magnetic gap 111. When the second voice coil 124 is connected to the second diaphragm 122, the second voice coil 124 is inserted between the inner magnetic conductive plate 114a and the central magnetic conductive plate 115a, one side of the connecting member 125 is connected to the second voice coil 124, the other side passes through the yoke plate 116 to connect to the third diaphragm 131, and the yoke plate 116 is provided with a through hole 117 for avoiding the connecting member 125. Or, the second voice coil 124 is connected to the third diaphragm 131, one side of the connecting piece 125 is connected to the second voice coil 124, the other side is connected to the second diaphragm 122, and a through hole for the connecting piece 125 to pass through is provided between the inner magnetic conductive plate 114a and the central magnetic conductive plate 115 a.

In one embodiment, when the second voice coil 124 is configured as two flat voice coils 124a, the yoke plate 116 is provided with a through hole 117 through which the flat voice coil 124a passes, and the through hole 117 forms a third magnetic gap. The flat voice coil 124a includes two opposite long sides and two short sides connecting the two long sides, one long side being connected to the second diaphragm 122 and interposed between the inner magnetic conductive plate 114a and the center magnetic conductive plate 115a and interposed between the second magnetic gap 112, and the other long side being connected to the third diaphragm 131 and through-hole 117, i.e., interposed between the third magnetic gap.

To facilitate the installation of the third diaphragm 131, a housing 119 is provided on a side of the magnetic circuit 110 facing away from the first vibration unit 120, and an outer edge of the third diaphragm 131 is fixed to the housing 119. The housing 119 may be a plastic material or the like.

To facilitate the installation of the first vibration unit 120, the magnetic circuit system 110 further includes an annular mounting portion 118, and the outer periphery of the first diaphragm 121 is fixed to the annular mounting portion 118, and the annular mounting portion 118 and the magnetic circuit system 110 are integrally formed or separately formed. Specifically, the annular mounting portion 118 may be formed by bending and extending the outer edge of the side magnetic conductive plate 113a of the magnetic circuit 110 toward one side of the first vibration unit 120, or the annular mounting portion 118 may be an annular bracket provided on the outer edge of the side magnetic conductive plate 113a of the magnetic circuit 110.

Further, the outer peripheral edge of the first diaphragm 121 is adhered to the annular mounting portion 118. Thereby not only facilitating the installation of the first diaphragm 121, but also ensuring the installation stability of the first diaphragm 121, and further ensuring the installation stability of the first diaphragm 121, the outer periphery of the first diaphragm 121 is coated on the annular installation portion 118.

Referring to fig. 1 to 11, in order to facilitate connection of the first voice coil 123 and the second voice coil 124 to an external circuit, the magnetic circuit 110 is provided with a conductive support piece 140, and the magnetic circuit 110 has an avoidance space for avoiding the conductive support piece 140. Specifically, the conductive support piece 140 is used for connecting the first voice coil 123 and the second voice coil 124 to an external circuit.

Referring to fig. 6, the inner magnetic part 114 includes a plurality of inner magnetic parts 114, and the plurality of inner magnetic parts 114 are spaced apart from each other on the circumferential side of the central magnetic part 115, and the space between adjacent inner magnetic parts 114 forms a first escape space 150; the side magnetic parts 113 comprise a plurality of side magnetic parts 113, the side magnetic parts 113 are arranged on the periphery side of the inner magnet 114b at intervals, a second avoiding space 151 is formed at intervals between the adjacent side magnetic parts 113, and the second avoiding space 151, the first magnetic gap 111, the first avoiding space 150 and the second magnetic gap 112 are mutually communicated for placing the conductive support sheet 140. Preferably, the conductive support 140 is connected to an end of the first voice coil 123 away from the first diaphragm 121.

Referring to fig. 9, when the first voice coil 123 and the second voice coil 124 are both configured as annular voice coils and are coaxially disposed, in one embodiment, the conductive support pieces 140 include four, and the four conductive support pieces 140 are disposed at intervals at the corners of the sound generating device 100. Alternatively, two conductive tabs 140 of the four conductive tabs 140 electrically connect the first voice coil 123 and the external circuit, and the other two conductive tabs 140 electrically connect the second voice coil 124 and the external circuit.

Referring to fig. 3 and 8, when the second voice coil 124 includes two flat voice coils 124a, the conductive tab 140 includes a first conductive portion 141, a second conductive portion 142, and an elastic conductive portion 143 connecting the first conductive portion 141 and the second conductive portion 142, the second conductive portion 142 has a first electrical connection site 142a, an intermediate conductive portion 142b, and a second electrical connection site 142c connected in sequence, the second electrical connection site 142c is electrically connected to the second voice coil 124, the first electrical connection site 142a is electrically connected to the first voice coil 123, and the first conductive portion 141 is used for connecting an external circuit. Specifically, the first conductive portion 141 is used to connect to an external circuit, the elastic conductive portion 143 is used to connect the first conductive portion 141 and the second conductive portion 142, and the second conductive portion 142 is used to connect the first voice coil 123 and the second voice coil 124, so that the first voice coil 123 and the second voice coil 124 are connected to the external circuit. The middle conductive portion 142b is disposed in the first avoidance space 150, and the elastic conductive portion 143 is disposed in the second avoidance space 151. The second electrical connection location 142c is formed with a clamping groove, and the two flat voice coils 124a are clamped in the clamping groove.

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

Claims

1. An electronic device, comprising:

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

3. The electronic device of claim 1, wherein an output area of the first output aperture is greater than an output area of the second output aperture.

4. The electronic device according to claim 1, wherein the sound generating means further includes a magnetic circuit system formed with a first magnetic gap and a second magnetic gap, and the first magnetic gap is located outside the second magnetic gap;

5. The electronic device of claim 4, wherein the magnetic circuit includes a side magnetic portion, an inner magnetic portion, a center magnetic portion, and a yoke plate,

6. The electronic device according to claim 4, wherein the second voice coil includes two flat voice coils arranged at intervals, an axial direction of the flat voice coils is perpendicular to a vibration direction of the first vibration unit, one side of the flat voice coils is fixed to the second diaphragm, and the other side is fixed to the third diaphragm to drive the second diaphragm and the third diaphragm to vibrate in the same direction;

7. The electronic device of claim 1, wherein an outer periphery of the second diaphragm is connected to an inner periphery of the first diaphragm;

8. The electronic device of claim 7, wherein the first diaphragm has a first effective radiating area Sd1, the second diaphragm has a second effective radiating area Sd2, and the third diaphragm has a third effective radiating area Sd3, sd 3/(s2+s1) +.0.4.

9. The electronic device of claim 7, wherein the second diaphragm has a second effective radiating area Sd2 and the third diaphragm has a third effective radiating area Sd3,0.95 ∈s3/Sd 2 ∈1.05.

10. The electronic device according to any one of claims 1 to 9, wherein the housing includes a first case and a second case connected to each other, the first case having a first limit step, the first vibration unit being connected to the first limit step, a first front acoustic chamber being formed between the first vibration unit and the first case, the first front acoustic chamber being in communication with the first sound outlet;