CN212086466U - Speaker and electronic equipment - Google Patents

Abstract

The present disclosure provides a speaker and an electronic apparatus. The speaker includes: the shell comprises a sound cavity, the vibrating diaphragm comprises a first vibrating diaphragm surface and a second vibrating diaphragm surface opposite to the first vibrating diaphragm surface, the first magnetic component and the second magnetic component are arranged in the sound cavity, the first elastic component is connected between the first vibrating diaphragm surface and the first magnetic component, and the second elastic component is connected between the second vibrating diaphragm surface and the second magnetic component. Based on the cooperation of first elastic component and second elastic component, make the vibrating diaphragm slide when vibrating, not only do benefit to the increase vibration range like this to make speaker and electronic equipment send the sound of great volume, and still avoid the vibrating diaphragm to appear cutting apart the vibration, guarantee sound quality.

Description

Speaker and electronic equipment

Technical Field

The present disclosure relates to the field of electronic devices, and in particular, to a speaker and an electronic device.

Background

Electronic equipment such as cell-phone, panel computer and intelligent audio amplifier all include the speaker, and the speaker gives these electronic equipment the function of broadcast audio frequency. The speaker includes a diaphragm, and generates sound by controlling vibration of the diaphragm. However, the diaphragm is typically fixed within the speaker, which limits the amplitude of the vibration of the diaphragm, limiting the maximum volume at which the speaker can play audio.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides an improved speaker and electronic device.

One aspect of the present disclosure provides a speaker, including:

a housing comprising a sound chamber;

the vibrating diaphragm is arranged in the sound cavity and comprises a first vibrating diaphragm surface and a second vibrating diaphragm surface opposite to the first vibrating diaphragm surface;

the first magnetic assembly and the second magnetic assembly are arranged in the sound cavity;

the first elastic piece is connected between the first vibration film surface and the first magnetic assembly; and

and the second elastic piece is connected between the second vibration film surface and the second magnetic assembly.

Optionally, the inner surface of the sound cavity comprises a smooth surface.

Optionally, an axis of the first elastic element is perpendicular to the first vibrating surface, and the first elastic element is connected with the center of the first vibrating surface;

the axis of the second elastic piece is perpendicular to the second vibrating surface, and the second elastic piece is connected with the center of the second vibrating surface.

Optionally, the speaker further comprises a voice coil;

the voice coil is arranged on the second diaphragm surface, and the axis of the voice coil penetrates through the diaphragm;

the first magnetic assembly and the second magnetic assembly are arranged in the sound cavity facing the diaphragm, and when alternating current is conducted to the voice coil, the voice coil attracts or repels the first magnetic assembly and the second magnetic assembly.

Optionally, the acoustic cavity comprises a first acoustic cavity face facing the first diaphragm face and a second acoustic cavity face facing the second diaphragm face;

the first magnetic component comprises a first magnet fixed on the first sound cavity surface; or the second magnetic component comprises a second magnet fixed on the second sound cavity surface.

Optionally, the acoustic cavity comprises a first acoustic cavity face facing the first diaphragm face and a second acoustic cavity face facing the second diaphragm face;

the first magnetic component comprises a first magnet fixed on the first sound cavity surface; and the second magnetic assembly comprises a second magnet fixed on the second sound cavity surface, and the magnetic pole of the second magnet facing the first magnet is the same as the magnetic pole of the first magnet facing the second magnet.

Optionally, the voice coil is in a spiral line structure, and the voice coil is attached to the second diaphragm surface.

Optionally, in the voice coil, the distance between any adjacent inner ring and outer ring is equal.

Optionally, the acoustic cavity comprises a first acoustic cavity between the first diaphragm face and the enclosure, and a second acoustic cavity between the second diaphragm face and the enclosure;

the shell is provided with a sound outlet hole which is communicated with the first sound cavity; and/or the shell is provided with a sound venting hole which is communicated with the second sound cavity.

Another aspect of the present disclosure provides an electronic device including the speaker of any one of the above-mentioned.

The technical scheme provided by the disclosure at least has the following beneficial effects:

the loudspeaker and the electronic equipment provided by the embodiment of the disclosure are connected between the first vibration film surface of the vibration film and the first magnetic assembly based on the first elastic part, the second elastic part is connected between the second vibration film surface of the vibration film and the second magnetic assembly, the vibration film can slide in a sound cavity during vibration, the vibration amplitude of the vibration film is not limited by a shell or other parts, the vibration amplitude is favorably increased, so that the loudspeaker and the electronic equipment can emit sound with larger volume, the vibration of the vibration film is avoided from being cut apart, and the sound quality is ensured. And through the cooperation of first elastic component and second elastic component, still when the vibrating diaphragm stops sliding, make the vibrating diaphragm atress balanced to stabilize the vibrating diaphragm in the sound chamber.

Drawings

Fig. 1 is a partial structural sectional view of a speaker provided in the related art;

FIG. 2 is a schematic diagram illustrating an electronic device according to an exemplary embodiment of the present disclosure;

FIG. 3 illustrates a partial structural cross-sectional view of a speaker according to an exemplary embodiment of the present disclosure;

FIG. 4 illustrates an equivalent schematic diagram of a first magnet, a second magnet, and a voice coil, according to an exemplary embodiment of the present disclosure;

fig. 5 illustrates a front view of a voice coil according to an exemplary embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprises" or "comprising" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

As used in this disclosure and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

Fig. 1 is a partial structural sectional view of a speaker provided in the related art. In some embodiments, referring to fig. 1, a speaker includes: a housing 110, a diaphragm 120, a magnetic assembly 130, and a voice coil 140. The casing 110 forms a sound cavity 111, and the diaphragm 120, the magnetic assembly 130 and the voice coil 140 are disposed in the sound cavity 111. The diaphragm 120 is fixed to the sound cavity 111 through the adhesive 150, the voice coil 140 is connected to one side of the diaphragm 120, and the voice coil 140 extends to the magnetic field region formed by the magnetic element 130. When the voice coil 140 is energized with an alternating current, the voice coil 140 cuts the magnetic induction line and vibrates under stress, thereby driving the diaphragm 120 to vibrate, so that the diaphragm 120 extrudes air to generate sound.

However, since the diaphragm 120 is fixed to the sound chamber 111, the amplitude of vibration of the diaphragm 120 is limited, which limits the maximum sound volume of the speaker. Moreover, when the voice coil 140 receives a low-frequency alternating current, the vibration amplitude of the diaphragm 120 is large, and the connection force between the periphery of the diaphragm 120 and the housing 110 is different, which easily causes the diaphragm 120 to split and vibrate, i.e., the diaphragm 120 is not flat when vibrating, and different regions of the diaphragm 120 vibrate at different times, which may distort an audio signal played by the speaker.

Based on the above defects, embodiments of the present disclosure provide a speaker and an electronic device, which are described in detail below with reference to the accompanying drawings:

the electronic device provided by the embodiment of the present disclosure includes but is not limited to: the intelligent mobile phone comprises a mobile phone, a tablet computer, an iPad, a digital broadcast terminal, a messaging device, a game console, a medical device, a fitness device, a personal digital assistant, an intelligent wearable device, an intelligent television, a sweeping robot, an intelligent sound box and the like.

Fig. 2 is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present disclosure. Referring to fig. 2, the electronic device 200 includes a main body 210 and a speaker 220. Wherein, the body 210 is formed with an installation cavity and a sound guide hole 211 communicating with the installation cavity. The speaker 220 and other components are assembled in the mounting chamber, and the speaker 220 guides the sound through the sound guide hole 211.

Illustratively, the body 210 includes a middle frame, a rear cover, and a display panel. The middle frame comprises a front surface and a back surface opposite to the front surface, the display panel is assembled on the front surface of the middle frame, the rear cover is assembled on the back surface of the middle frame, and the middle frame, the rear cover and the display panel are matched to form an installation cavity of the machine body 210. The sound guide hole 211 may be provided in the middle frame.

Illustratively, the speaker 220 is disposed proximate to a display panel of the electronic device. Illustratively, the speaker 220 is disposed proximate a rear cover of the electronic device. Illustratively, the speaker 220 is provided at the top and/or bottom of the electronic device. Illustratively, the speaker 220 is provided in the middle of the electronic device. The present disclosure does not specifically limit the position where the speaker 220 is disposed.

Fig. 3 illustrates a partial cross-sectional structural view of a speaker 220 according to an exemplary embodiment of the present disclosure. Referring to fig. 3, the speaker 220 includes: the magnetic component comprises a shell 230, a diaphragm 240, a first elastic member 251 and a second elastic member 252, and a first magnetic component 260 and a second magnetic component 270.

The housing 230 includes a sound cavity 231 for accommodating the diaphragm 240, the first elastic member 251 and the second elastic member 252, the first magnetic assembly 260 and the second magnetic assembly 270, and so on. The housing 230 may also be referred to as a support for the speaker. The housing 230 may have various structures, such as a cylindrical structure, a rectangular parallelepiped structure, a regular polygonal cylindrical structure, and the like, which are not limited in this disclosure.

A diaphragm 240 is arranged in the sound chamber 231, the diaphragm 240 comprising a first diaphragm face 241 and a second diaphragm face 242 opposite the first diaphragm face 241. The diaphragm 240 is slidably disposed in the sound cavity 231 along a first direction and a second direction opposite to the first direction, the first direction is a direction in which the second diaphragm surface 242 points to the first diaphragm surface 241, and the diaphragm 240 slides when vibrating to press air to generate sound. The second diaphragm surface 242 may be parallel to the x-axis in fig. 3, a first direction of the second diaphragm surface 242 pointing to the first diaphragm surface 241 may be a y-axis direction in fig. 3, and a direction opposite to the first direction may be a direction opposite to the y-axis direction in fig. 3, that is, the diaphragm 240 may slide up and down according to the y-axis direction in fig. 3. It is understood that when the diaphragm 240 vibrates in the first direction, the diaphragm 240 may slide in the first direction. When the diaphragm 240 vibrates in the second direction, the diaphragm 240 may slide in the second direction.

The first magnetic assembly 260 and the second magnetic assembly 270 are disposed in the sound chamber 231.

The first elastic member 251 is connected between the first diaphragm surface 241 and the first magnetic module 260, and the second elastic member 252 is connected between the second diaphragm surface 242 and the second magnetic module 270. It should be noted that the first elastic member 251 and the second elastic member 252 both have specific elastic coefficients so as not to affect the sliding of the diaphragm 240, and when the diaphragm 240 stops vibrating, the first elastic member 251 and the second elastic member 252 stabilize the diaphragm 240 in the sound cavity 231. When the diaphragm 240 vibrates and slides along the y-axis direction, the first elastic member 251 may be in a contracted state, and the second elastic member 252 may be in a stretched state; when the diaphragm 240 vibrates and slides in a direction away from the y-axis, the first elastic member 251 may be in a stretched state, and the second elastic member 252 may be in a compressed state. When the diaphragm 240 stops vibrating, the first elastic member 251 and the second elastic member 252 cooperate to drive the diaphragm 240 to return to the initial position. Thus, the first elastic member 251 and the second elastic member 252 cooperate to balance the force applied to the diaphragm 240 when the diaphragm 240 stops vibrating, so as to stabilize the diaphragm 240 in the sound cavity 231 of the housing 230.

Illustratively, the first elastic member 251 and the second elastic member 252 are both springs.

Based on the above, according to the speaker 220 and the electronic device 200 provided by the embodiment of the disclosure, based on the first elastic member 251 connected between the first diaphragm surface 241 of the diaphragm 240 and the first magnetic assembly 260, and the second elastic member 252 connected between the second diaphragm surface 242 of the diaphragm 240 and the second magnetic assembly 270, when the diaphragm 240 vibrates, the diaphragm 240 slides in the first direction and the back-to-first direction in the sound cavity 231, and the vibration amplitude of the diaphragm 240 is not limited by the housing 230 or other components, which is not only beneficial to increasing the vibration amplitude, so that the speaker 220 and the electronic device 200 emit sound with larger volume, but also prevents the diaphragm 240 from generating split vibration due to the integral sliding of the diaphragm 240, thereby ensuring the sound quality. Through the cooperation of the first elastic member 251 and the second elastic member 252, the elastic force is given to the diaphragm 240, so that not only the diaphragm 240 can slide, but also the diaphragm 240 is in a zero-stress state when the diaphragm 240 stops sliding, so as to stabilize the diaphragm 240 to the sound cavity 231, for example, to an initial position.

In some embodiments, with continued reference to fig. 3, the inner surface of the acoustic cavity 231 includes a smooth surface 232. The diaphragm 240 further comprises a third diaphragm face 243 connecting the first and second diaphragm faces 241, 242, the third diaphragm face 243 being in contact with the smooth surface 232. By providing the smooth surface 232, the frictional resistance between the third diaphragm surface 243 and the housing 230 is reduced, so that the diaphragm 240 slides smoothly in the sound cavity 231 without disturbing the sound quality due to the large frictional resistance.

Illustratively, the inner wall of the housing 230 may be formed of a smooth material such that the inner surface of the acoustic cavity 231 includes a smooth surface 232. Illustratively, the inner wall of the housing 230 may also be provided with a smooth layer, such that the inner surface of the sound cavity 231 comprises a smooth surface 232. The smoothing layer may also be formed of a smoothing material, and both the material of the smoothing layer and the smoothing material may include a polymer material and a ceramic material, which is not particularly limited in this disclosure.

Further, the present disclosure gives the following embodiments with respect to the deployment position of the first elastic member 251 and the second elastic member 252:

in some embodiments, with continued reference to fig. 3, the axis of the first elastic member 251 is perpendicular to the first diaphragm surface 241, and the first elastic member 251 is connected to the center of the first diaphragm surface 241; the axis of the second elastic member 252 is perpendicular to the second diaphragm face 242, and the second elastic member 252 is connected to the center of the second diaphragm face 242. For example, the axes of the first elastic member 251 and the second elastic member 252 may be axes passing through the center of each coil of the spring, respectively. Note that the axis of the first elastic member 251 is a straight line that the first elastic member 251 is disposed in the extending and contracting direction and passes through the center thereof. The axis of the second elastic member 252 is a straight line that the second elastic member 252 is disposed in the telescopic direction and passes through the center thereof. Therefore, the first elastic member 251 and the second elastic member 252 are not only conveniently arranged, but also the center of the diaphragm 240 is stressed, so that the edge of the diaphragm 240 is prevented from being stressed to press the inner surface of the sound cavity 231, and the sliding of the diaphragm 240 is facilitated. Moreover, the first elastic member 251 and the second elastic member 252 are oppositely disposed on two sides of the diaphragm 240, and when the diaphragm 240 stops sliding, the first elastic member 251 and the second elastic member 252 cooperate to balance the force of the diaphragm 240 and stabilize the diaphragm in the sound cavity 231.

In other embodiments, the axis of the first elastic member 251 is perpendicular to the first diaphragm surface 241, the axis of the second elastic member 252 is perpendicular to the second diaphragm surface 242, and the axis of the first elastic member 251 and the axis of the second elastic member 252 are offset. The diaphragm 240 is stabilized by the first elastic member 251 and the second elastic member 252 in cooperation.

In other embodiments, the axis of the first elastic member 251 and the first vibration film surface 241 form an acute angle, the axis of the second elastic member 252 and the second vibration film surface 242 form an acute angle, and the first elastic member 251 and the second elastic member 252 are obliquely arranged in the same direction. Thus, the component forces of the first elastic member 251 and the second elastic member in the x-axis are balanced, and the component force in the y-axis stabilizes the diaphragm 240 in the sound cavity 231.

In addition, the first elastic member 251 and the second elastic member 252 may be arranged in other manners, which is not specifically limited by the present disclosure.

In some embodiments, with continued reference to fig. 3, the speaker 220 further includes a voice coil 280; the voice coil 280 is arranged on the second diaphragm surface 242, and the axis of the voice coil 280 passes through the diaphragm 240; the first magnetic assembly 260 and the second magnetic assembly 270 are disposed in the sound cavity 231 facing the diaphragm 240, and when the voice coil 280 is energized with an alternating current, the voice coil 280 attracts or repels the first magnetic assembly 260 and the second magnetic assembly 270. When the voice coil 280 is energized with an alternating current, the voice coil 280 is equivalent to an electromagnet, so that the voice coil 280 attracts or repels the first magnetic assembly 260 and the second magnetic assembly 270, and under the action of the attraction or repulsion, the voice coil 280 drives the diaphragm 240 to slide to generate a sound. By adjusting the direction of the alternating current flowing in the voice coil 280, the attraction or repulsion effect between the voice coil 280 and the first and second magnetic assemblies 260 and 270 is changed. The voice coil 280 may be connected to a power amplifier of the electronic device 200, and the power amplifier is controlled to input alternating currents with different magnitudes and directions to the voice coil 280.

In some embodiments, with continued reference to fig. 3, the acoustic cavity 231 includes a first acoustic cavity surface 233 facing the first diaphragm face 241 and a second acoustic cavity surface 234 facing the second diaphragm face 242; the first magnetic assembly 260 includes a first magnet 261 fixed to the first cavity surface 233; or the second magnetic element 270 includes a second magnet 271 secured to the second sound cavity surface 234. The first magnet 261 or the second magnet 271 is easy to obtain, convenient to arrange, and energy consumption is saved compared with an electromagnet. When the voice coil 280 is energized with an alternating current, the voice coil 280 generates a magnetic field, the voice coil 280 is equivalent to an electromagnet, the electromagnet includes an N pole and an S pole, and the electromagnet attracts or repels the first magnet 261 or the second magnet 271, so that the voice coil 280 drives the diaphragm 240 to slide.

In some embodiments, with continued reference to fig. 3, the acoustic cavity 231 includes a first acoustic cavity surface 233 facing the first diaphragm face 241 and a second acoustic cavity surface 234 facing the second diaphragm face 242; the first magnetic assembly 260 includes a first magnet 261 fixed to the first cavity surface 233; and the second magnetic assembly 270 includes a second magnet 271 fixed to the second sound cavity surface 234, and the magnetic pole of the second magnet 271 facing the first magnet 261 is the same as the magnetic pole of the first magnet 261 facing the second magnet 271. In other words, the diaphragm 240 is disposed between the first magnet 261 and the second magnet 271. When the voice coil 280 is energized with an alternating current, the voice coil 280 generates a magnetic field and is equivalent to an electromagnet, the electromagnet includes an N pole and an S pole, and the electromagnet attracts or repels the first magnet 261 and the second magnet 271, so that the voice coil 280 drives the diaphragm 240 to slide.

Fig. 4 is an equivalent schematic diagram illustrating a first magnet 261, a second magnet 271, and a voice coil 280 according to an exemplary embodiment of the present disclosure. For example, referring to fig. 4, the end of the first magnet 261 facing the voice coil 280 (diaphragm 240) is N-pole, and the end of the second magnet 271 facing the voice coil 280 (diaphragm 240) is N-pole. When the voice coil 280 is supplied with the first ac current, an S pole is formed at an end of the voice coil 280 facing the first magnet 261 and is attracted to the first magnet 261, and an N pole is formed at an end of the voice coil 280 facing the second magnet 271 and is repelled from the second magnet 271, so that the voice coil 280 drives the diaphragm 240 to slide facing the first magnet 261 under the cooperation of the first magnet 261 and the second magnet 271. When the voice coil 280 is supplied with the second alternating current, an end of the voice coil 280 facing the first magnet 261 forms an N pole and is mutually repelled from the first magnet 261, and an end of the voice coil 280 facing the second magnet 271 forms an S pole and is mutually attracted from the second magnet 271, so that the voice coil 280 drives the diaphragm 240 to slide facing the second magnet 271 under the cooperation of the first magnet 261 and the second magnet 271.

In some embodiments, with continued reference to FIG. 3, the acoustic cavity 231 includes a first acoustic cavity 235 between the first diaphragm face 241 and the enclosure 230, and a second acoustic cavity 236 between the second diaphragm face 242 and the enclosure 230; the housing 230 is provided with a sound outlet 237, the sound outlet 237 is communicated with the first sound cavity 235; and/or the housing 230 is provided with a vent 238, the vent 238 being in communication with the second acoustic chamber 236. In other words, diaphragm 240 divides sound cavity 231 into a first sound cavity 235 and a second sound cavity 236. The sound generated from the first sound chamber 235 is output to the sound guide hole 211 of the electronic device 200 through the sound output hole 237, so that the electronic device 200 plays audio. The second sound cavity 236 is vented through the vent hole 238, so that the second sound cavity 236 is prevented from blocking the diaphragm 240 from sliding due to too much or too little pressure.

FIG. 5 illustrates a front view of the voice coil 280 of the present disclosure according to an exemplary embodiment. In some embodiments, referring to fig. 5, the voice coil 280 is in a spiral structure, and the voice coil 280 is attached to the second diaphragm surface 242. Illustratively, the voice coil 280 extends helically from inside to outside along the second diaphragm face 242. That is, the voice coil 280 extends spirally from the inside to the outside to form a layer, and is attached to the second diaphragm surface 242. When the voice coil 280 is energized with an alternating current, each coil generates a magnetic field that attracts or repels the first magnetic assembly 260 and the second magnetic assembly 270, and the voice coil 280 is attached to the second diaphragm surface 242, so that most of the area of the diaphragm 240 is forced to slide, and the problem of split vibration of the diaphragm 240 is avoided.

Further, in some embodiments, any adjacent inner and outer turns are equally spaced within the voice coil 280. It should be noted that the voice coil 280 includes a plurality of coils connected in a spiral structure, and in any two adjacent coils, the coil located on the inner side is an inner coil, the coil located on the outer side is an outer coil, and the distances between any two adjacent inner and outer coils are equal. That is, the plurality of coils of the voice coil 280 are uniformly arranged on the second diaphragm surface 242. Thus, when the coils of the voice coil 280 are subjected to attractive force or repulsive force, the diaphragm 240 is driven by uniform driving force to slide, so that the overall stable sliding of the diaphragm 240 is facilitated, and the problem of split vibration of the diaphragm 240 is effectively avoided.

Illustratively, the axis of voice coil 280 passes through the center of diaphragm 240 and conforms to the entire second diaphragm surface 242. Therefore, the whole sliding of the diaphragm 240 is facilitated, and the problem of splitting vibration is avoided.

The above embodiments of the present disclosure may be complementary to each other without conflict.

The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A loudspeaker, characterized in that the loudspeaker comprises:

a housing comprising a sound chamber;

the vibrating diaphragm is arranged in the sound cavity and comprises a first vibrating diaphragm surface and a second vibrating diaphragm surface opposite to the first vibrating diaphragm surface;

the first magnetic assembly and the second magnetic assembly are arranged in the sound cavity;

the first elastic piece is connected between the first vibration film surface and the first magnetic assembly; and

and the second elastic piece is connected between the second vibration film surface and the second magnetic assembly.

2. The loudspeaker of claim 1 wherein the inner surface of the acoustic chamber comprises a smooth surface.

3. The loudspeaker of claim 1, wherein an axis of the first elastic member is perpendicular to the first diaphragm face, and the first elastic member is connected to a center of the first diaphragm face;

the axis of the second elastic piece is perpendicular to the second vibrating surface, and the second elastic piece is connected with the center of the second vibrating surface.

4. The speaker of claim 1, further comprising a voice coil;

the voice coil is arranged on the second diaphragm surface, and the axis of the voice coil penetrates through the diaphragm;

the first magnetic assembly and the second magnetic assembly are arranged in the sound cavity facing the diaphragm, and when the voice coil is electrified with alternating current, the voice coil attracts or repels the first magnetic assembly and the second magnetic assembly.

5. The loudspeaker of claim 4 wherein the acoustic cavity comprises a first acoustic cavity face facing the first diaphragm face and a second acoustic cavity face facing the second diaphragm face;

the first magnetic component comprises a first magnet fixed on the first sound cavity surface; or the second magnetic component comprises a second magnet fixed on the second sound cavity surface.

6. The loudspeaker of claim 4 wherein the acoustic cavity comprises a first acoustic cavity face facing the first diaphragm face and a second acoustic cavity face facing the second diaphragm face;

the first magnetic component comprises a first magnet fixed on the first sound cavity surface; and the second magnetic assembly comprises a second magnet fixed on the second sound cavity surface, and the magnetic pole of the second magnet facing the first magnet is the same as the magnetic pole of the first magnet facing the second magnet.

7. The speaker of claim 4, wherein the voice coil is in a spiral configuration and is attached to the second diaphragm surface.

8. The loudspeaker of claim 7, wherein any adjacent inner and outer turns in the voice coil are equally spaced.

9. The loudspeaker of claim 1 wherein the acoustic cavity comprises a first acoustic cavity between the first diaphragm face and the enclosure and a second acoustic cavity between the second diaphragm face and the enclosure;

the shell is provided with a sound outlet hole which is communicated with the first sound cavity; and/or the shell is provided with a sound venting hole which is communicated with the second sound cavity.

10. An electronic device, characterized in that the electronic device comprises a loudspeaker according to any one of claims 1 to 9.

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