CN111556404A

CN111556404A - Loudspeaker

Info

Publication number: CN111556404A
Application number: CN202010479243.3A
Authority: CN
Inventors: 韩坤; 罗鹏; 任雪冬; 廖昀
Original assignee: Anker Innovations Co Ltd
Current assignee: Anker Innovations Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-08-18
Also published as: WO2021238459A1

Abstract

The invention relates to the technical field of loudspeakers and discloses a loudspeaker. The loudspeaker comprises a diaphragm, a first mass part and a second mass part, wherein the first mass part is connected with the diaphragm, the second mass part is connected with the first mass part through a first elastic part, and the first mass part or the second mass part is provided with a voice coil. The loudspeaker further comprises a magnetic circuit component used for generating a magnetic field, so that when the voice coil is electrified and under the action of the magnetic field, the mass component without the voice coil is driven by the mass component with the voice coil to move, and then the first mass component and the second mass component drive the vibrating diaphragm to vibrate and produce sound together. Through the mode, the effect of the loudspeaker for restoring the sound signal can be improved, and the loudspeaker is beneficial to reducing the volume.

Description

Loudspeaker

Technical Field

The invention relates to the technical field of loudspeakers, in particular to a loudspeaker.

Background

The traditional moving coil loudspeaker uses the design scheme of single radiating surface and single resonance system, and specifically uses the voice coil as the driving source, and the voice coil self constitutes a resonance system with the book ring of vibrating diaphragm, drives whole vibrating diaphragm voice coil subassembly and vibrates, and then forms acoustic signal.

However, for a conventional moving coil speaker with a single radiating surface and a single resonance system, the acoustic output of the closed field low frequency before the first resonance frequency is a smooth curve, and no resonance peak or valley is formed. Such a low frequency completely smooth curve does not conform to the reproduction of sound in a closed field, and does not give the human ear an optimal musical feeling.

In view of the above technical problems, some multi-unit solutions are available in the market, specifically, two or more speaker units are used to adjust the curve. However, the design scheme of the multi-radiation surface and multi-resonance system occupies too much space, and the radiation surfaces of the diaphragms are affected with each other, so that the effect is poor.

Disclosure of Invention

In view of the above, the present invention provides a speaker, which can improve the sound signal restoring effect of the speaker and is beneficial to reduce the volume of the speaker.

In order to solve the technical problems, the invention adopts a technical scheme that: a speaker is provided. The loudspeaker comprises a diaphragm, a first mass part and a second mass part, wherein the first mass part is connected with the diaphragm, the second mass part is connected with the first mass part through a first elastic part, and the first mass part or the second mass part is provided with a voice coil. The loudspeaker further comprises a magnetic circuit component used for generating a magnetic field, so that when the voice coil is electrified and under the action of the magnetic field, the mass component without the voice coil is driven by the mass component with the voice coil to move, and then the first mass component and the second mass component drive the vibrating diaphragm to vibrate and produce sound together.

In an embodiment of the invention, the second mass part is located on a side of the first mass part remote from the diaphragm.

In one embodiment of the present invention, the speaker includes at least two first elastic members that are disposed apart from each other in a circumferential direction of the first mass member and the second mass member.

In an embodiment of the invention, the first elastic member is annular, and two opposite sides of the first elastic member are respectively connected with the first mass component and the second mass component.

In one embodiment of the present invention, the magnetic circuit assembly has a voice coil cavity in which the magnetic field is formed, and at least a portion of the first mass member and the second mass member are located in the voice coil cavity, wherein the first mass member and the second mass member move in an axial direction of the voice coil cavity.

In an embodiment of the present invention, the speaker further includes a second elastic member, one end of the second elastic member is connected to the second mass member, and the other end of the second elastic member is fixed, and the second elastic member is configured to provide a radial supporting force to the second mass member to limit a relative position of the second mass member in a radial direction.

In an embodiment of the invention, the speaker further includes a frame, the magnetic circuit assembly is provided with a groove, and an end of the second elastic member away from the second mass part is fixed to the frame through the groove.

In one embodiment of the invention, the second elastic member is connected to the second mass member at a position where the first elastic member is connected.

In an embodiment of the invention, the magnetic circuit assembly has a voice coil cavity in which at least part of the first mass part and the second mass part are located, wherein the voice coil cavity is filled with a viscous medium for providing viscous resistance to the first mass part and the second mass part to limit the relative positions thereof in the radial direction.

In one embodiment of the invention, the diaphragm includes a ball top and a corrugated portion connecting outer edges of the ball top and surrounding the ball top, the first mass member connecting the ball top.

The invention has the beneficial effects that: different from the prior art, the invention provides a loudspeaker. This speaker only designs a vibrating diaphragm, adopts the design of single radiating surface promptly, compares in the design of many speaker units of traditional speaker, is favorable to reducing the volume of speaker to still avoided the vibrating diaphragm of different speaker units to radiate the influence each other, the interference between the face, therefore can improve the effect of speaker reduction sound signal. Meanwhile, the first mass part and the second mass part drive the vibrating diaphragm to vibrate and sound, namely the first mass part and the second mass part form a multi-resonance system, and a low-frequency acoustic curve of a closed field before the first resonance frequency of the loudspeaker can be adjusted to form a resonance peak valley, so that the effect of the loudspeaker for reducing sound signals can be further improved, and the user can feel acoustic with the best quality.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. Moreover, the drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate it by those skilled in the art with reference to specific embodiments.

FIG. 1 is a schematic diagram of a speaker according to an embodiment of the present invention;

fig. 2 is an exploded view of the loudspeaker of fig. 1;

fig. 3 is a schematic cross-sectional view of the loudspeaker of fig. 1;

FIG. 4 is a schematic diagram of the structure of the area A of the speaker shown in FIG. 3;

fig. 5 is a schematic cross-sectional view of another embodiment of the speaker of the present invention;

fig. 6 is a schematic diagram of a simulated comparison of the acoustic curves of the inventive loudspeaker and a conventional loudspeaker.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In order to solve the technical problems of poor sound signal restoring effect and large volume of a loudspeaker in the prior art, an embodiment of the invention provides a loudspeaker. The loudspeaker comprises a diaphragm, a first mass part and a second mass part, wherein the first mass part is connected with the diaphragm, the second mass part is connected with the first mass part through a first elastic part, and the first mass part or the second mass part is provided with a voice coil. The loudspeaker further comprises a magnetic circuit component used for generating a magnetic field, so that when the voice coil is electrified and under the action of the magnetic field, the mass component without the voice coil is driven by the mass component with the voice coil to move, and then the first mass component and the second mass component drive the vibrating diaphragm to vibrate and produce sound together. As described in detail below.

Referring to fig. 1-4, fig. 1 is a schematic structural diagram of an embodiment of a speaker of the present invention, fig. 2 is a schematic structural diagram of an explosion of the speaker shown in fig. 1, fig. 3 is a schematic structural diagram of a cross section of the speaker shown in fig. 1, and fig. 4 is a schematic structural diagram of a region a of the speaker shown in fig. 3.

In one embodiment, the speaker may be a moving-coil speaker or the like, which has a diaphragm 10, and the function of outputting audio by driving the diaphragm 10 to vibrate is realized. The speaker described in this embodiment can be applied to devices such as earphones, sound equipment, and the like, and is not limited herein.

The loudspeaker of the present embodiment is designed with only one diaphragm 10, i.e. with a single radiating surface. Conventional loudspeakers use a multi-loudspeaker-unit design, wherein each loudspeaker unit has a diaphragm. Compared with the design of the traditional loudspeaker with multiple loudspeaker units, the loudspeaker has the advantages that the number of the vibrating diaphragms 10 is reduced, the size of the loudspeaker is favorably reduced, the mutual influence and interference among the vibrating diaphragm radiation surfaces of different loudspeaker units are avoided, the problem that loudness and phases caused by different positions, sizes and the like of the vibrating diaphragm radiation surfaces of different loudspeaker units are not easily matched is solved, and therefore the effect of restoring sound signals by the loudspeaker can be improved.

The speaker of the present embodiment further includes a first mass member 20 and a second mass member 30. The first mass member 20 is connected to the diaphragm 10, and the second mass member 30 is connected to the first mass member 20 through the first elastic member 40, wherein the first mass member 20 or the second mass member 30 has a voice coil 50 (as shown in fig. 4, the same applies below).

The loudspeaker further comprises a magnetic circuit assembly 60. The magnetic circuit assembly 60 is configured to generate a magnetic field, so that when the voice coil 50 is energized and under the action of the magnetic field, the mass component without the voice coil 50 is driven by the mass component with the voice coil 50 to move, and then the first mass component 20 and the second mass component 30 jointly drive the diaphragm 10 to vibrate and generate sound.

That is to say, in order to overcome the defect that the low frequency of the closed field before the first resonant frequency of the conventional loudspeaker with a single radiation surface and a single resonance system is monotonous and not easy to adjust, the loudspeaker of this embodiment is composed of two resonance systems including the first mass component 20 and the second mass component 30, the first mass component 20 and the second mass component 30 drive the diaphragm 10 to vibrate and sound, and the motions of the first mass component 20 and the second mass component 30 act on the diaphragm 10 respectively, so as to realize a multi-resonance system based on a single diaphragm 10 (i.e. a single radiation surface), so that the low frequency part of the closed field before the first resonant frequency (the first resonant frequency is defined as extending from the low frequency to the high frequency direction, and the frequency at which the first resonant peak in the frequency response curve of the loudspeaker is the resonant frequency owned by the loudspeaker) of the loudspeaker is easier to adjust, and further the low frequency acoustic curve of the closed field before the first resonant frequency of the loudspeaker can be adjusted, the resonance peak valley is formed, that is, the acoustic curve of the low-frequency part before the first resonance frequency is in an L shape (as shown in a curve I in the following figure 6), so that the reduction of the sound signal under the closed field is facilitated, that is, the effect of the loudspeaker for reducing the sound signal can be further improved, and the user can feel acoustic with higher quality and more comfort. Wherein, the closed field is defined as the closed environment formed by the speaker after the user wears the speaker and the inside of the human ear.

It should be noted that the present embodiment can adjust the acoustic parameters such as the first resonant frequency of the speaker by adjusting the respective properties of the elements such as the diaphragm 10, the first elastic member 40, the first mass member 20, and the second mass member 30 (for example, the elasticity of the first elastic member 40, the masses of the first mass member 20 and the second mass member 30, and the like). The mass of the first mass part 20 and the second mass part 30 can be adjusted by adjusting the mass of the first mass part 20 and the second mass part 30 or by mounting additional mass, which is not limited herein.

The second mass member 30 is connected to the first mass member 20 through the first elastic member 40, and the first mass member 20 or the second mass member 30 has a voice coil 50. The mass component with the voice coil 50 can move under the action of a magnetic field when the voice coil 50 is electrified, the mass component without the voice coil 50 follows the mass component with the voice coil 50, and the mass component without the voice coil 50 is driven to move by the first elastic piece 40.

If the first mass part 20 and the second mass part 30 are rigidly connected, the first mass part 20 and the second mass part 30 will perform synchronous motion under the action of the magnetic field, so that although the first mass part 20 and the second mass part 30 are disposed in the loudspeaker, one mass part of the loudspeaker drives the diaphragm 10 to vibrate and generate sound, i.e. the loudspeaker is still a single resonance system in nature. Moreover, if the first mass part 20 and the second mass part 30 both have the voice coil 50, it is possible to make the first mass part 20 and the second mass part 30 synchronously drive the diaphragm 10 to vibrate and generate sound, and the mass is still a single resonance system.

Also, since the voice coil 50 of the speaker is generally annularly arranged around, in order to match the voice coil 50 so as to arrange the voice coil 50 on the first mass member 20 or the second mass member 30, the first mass member 20 and the second mass member 30 are also annularly shaped, and the voice coil 50 is arranged around the first mass member 20 or the second mass member 30 in the circumferential direction of the first mass member 20 or the second mass member 30.

Fig. 4 shows a case where the first mass member 20 has the voice coil 50, and the first mass member 20 itself is the voice coil 50 around which the coil is wound. Of course, in other embodiments of the present invention, the second mass member 30 itself may be a voice coil 50 formed by winding a coil, or the first mass member 20 or the second mass member 30 may be additionally mounted with the voice coil 50, which is not limited herein.

Please continue to refer to fig. 2 and 3. In one embodiment, the second mass part 30 is located on a side of the first mass part 20 away from the diaphragm 10, and opposite ends of the first mass part 20 and the second mass part 30 are respectively connected with the first elastic part 40.

Of course, in other embodiments of the present invention, the first mass part 20 and the second mass part 30 may be nested with each other, and the first mass part 20 and the second mass part 30 are connected by the first elastic member 40, so that the mass part without the voice coil 50 can be moved by the mass part with the voice coil 50.

The second mass part 30 is disposed on the side of the first mass part 20 away from the diaphragm 10, which is only for discussion purposes and is not limited thereto.

Please continue to refer to fig. 3. In one embodiment, the magnetic circuit assembly 60 has a voice coil cavity 61, and the voice coil cavity 61 has a cylindrical structure corresponding to the first mass member 20 and the second mass member 30. The voice coil cavity 61 is formed with the above-mentioned magnetic field, and at least a portion of the first mass member 20 and the second mass member 30 are located in the voice coil cavity 61, so that when the current is applied to the voice coil 50 and under the action of the magnetic field, the first mass member 20 and the second mass member 30 move in the axial direction of the voice coil cavity 61.

Please continue with fig. 2. In one embodiment, the speaker includes at least two first elastic members 40, the at least two first elastic members 40 are disposed at intervals from each other along the circumferential direction of the first and second

mass members

20 and 30, and both ends of each first elastic member 40 are respectively connected to the first and second

mass members

20 and 30 to achieve elastic connection between the first and second

mass members

20 and 30.

Further, the at least two first elastic members 40 are uniformly distributed along the circumferential direction of the first mass part 20 and the second mass part 30, which is beneficial to improving the effect that the mass part without the voice coil 50 in the first mass part 20 and the second mass part 30 moves along with the mass part with the voice coil 50, and is further beneficial to the loudspeaker to restore the sound signal, and improving the effect that the loudspeaker restores the sound signal.

In an alternative embodiment, the first elastic element 40 may also be ring-shaped, specifically, the first elastic element 40 is disposed around the first mass member 20 and the second mass member 30 in the circumferential direction, and two opposite sides of the first elastic element 40 are respectively connected to the first mass member 20 and the second mass member 30. That is, the first elastic member 40 of the present embodiment is not a design of at least two first elastic members 40 and arranged at a distance from each other as set forth in the above embodiments, and is not limited herein.

It should be noted that the cross-sectional shape of the first elastic member 40 in the axial direction (as indicated by an arrow X in fig. 3, the same applies hereinafter) of the first mass member 20 and the second mass member 30 is preferably arc-shaped, as shown in fig. 3. The first elastic member 40 provided in an arc shape is advantageous in ensuring the effect that the mass member without the voice coil 50 of both the first mass member 20 and the second mass member 30 moves with the mass member with the voice coil 50.

Please continue to refer to fig. 2 and 3. In one embodiment, since the first mass member 20 is connected to the diaphragm 10, the diaphragm 10 can play a role of limiting the relative position of the first mass member 20 in the radial direction, and the relative position of the second mass member 30 in the radial direction is not fixed. Here, the radial directions of the first mass member 20 and the second mass member 30 are shown by an arrow Y in fig. 3, the same applies below.

In view of this, the speaker further includes a second elastic member 70. One end of the second elastic member 70 is connected to the second mass member 30 and the other end is fixed. The second elastic member 70 serves to provide a radial supporting force to the second mass member 30 to restrict the relative position of the second mass member 30 in the radial direction, i.e., to perform a centering function. The second elastic element 70 only plays a role of limiting the relative position of the second mass part 30 in the radial direction, and does not affect the movement of the second mass part 30 that drives the diaphragm 10 to vibrate in the axial direction as much as possible.

Of course, in other embodiments of the present invention, the relative position of the first mass component 20 in the radial direction may also be further limited by the second elastic element 70, so as to ensure that the first mass component 20 works normally and avoid affecting the sound quality of the audio output by the speaker.

It should be noted that the cross-sectional shape of the second elastic member 70 in the radial direction of the second mass member 30 is preferably an arc shape, as shown in fig. 2 and 3. The second elastic member 70 provided in an arc shape can provide a sufficient radial supporting force to the second mass member 30. Also, fig. 2 and 3 illustrate a case where the speaker includes at least two second elastic members 70, the at least two second elastic members 70 are disposed at intervals from each other in the circumferential direction of the second mass member 30, and two second elastic members 70 are disposed opposite to each other in the radial direction of the second mass member 30, which is advantageous for stably maintaining the relative position of the second mass member 30 in the radial direction.

Of course, in other embodiments of the present invention, the second elastic element 70 may also be disposed in a ring shape, which is disposed around the second mass component 30 and forms an enclosure, and also facilitates to stably maintain the relative position of the second mass component 30 in the radial direction, which is not limited herein.

Please continue to refer to fig. 1 to fig. 3. In an embodiment, the speaker further comprises a frame 80. The frame 80 is used as a basic carrier, and the diaphragm 10 and the magnetic circuit assembly 60 of the speaker are fixedly arranged on the frame 80. The magnetic circuit assembly 60 is provided with a groove 62, and the end of the second elastic member 70 away from the second mass member 30 is fixed to the frame 80 through the groove 62, so as to fix the end of the second elastic member 70 away from the second mass member 30.

Taking the internal magnetic type magnetic circuit assembly 60 shown in fig. 2 and 3 as an example, the magnetic circuit assembly 60 includes a magnet 63 and a magnetizer 64, the magnet 63 is disposed in the magnetizer 64, and the magnet 63 and the magnetizer 64 surround to form the voice coil cavity 61, and at least a portion of the first mass part 20 and the second mass part 30 are located in the voice coil cavity 61. The first mass part 20 and the second mass part 30 are sleeved on the periphery of the magnet 63 and are positioned in a space surrounded by the magnetizer 64. The groove 62 is opened on the magnetic conductor 64 and radially penetrates through the magnetic conductor 64, and the end of the second elastic member 70 away from the second mass part 30 is fixed to the frame 80 through the groove 62 on the magnetic conductor 64.

Of course, in other embodiments of the present invention, the magnetic circuit assembly 60 may also adopt an external magnetic type, an internal magnetic type and an external magnetic type, which belongs to the understanding scope of those skilled in the art and will not be described herein.

Of course, in other embodiments of the present invention, the end of the second elastic member 70 away from the second mass member 30 may be directly fixed to the magnetic circuit assembly 60, so as to fix the end of the second elastic member 70 away from the second mass member 30 while omitting the design of the groove 62 on the magnetic circuit assembly 60.

Please continue to refer to fig. 2 and 3. In one embodiment, the second elastic member 70 is attached to the second mass member 30 at a position where the first elastic member 40 is attached. That is, the first elastic member 40 and the second elastic member 70 are connected to the same position on the second mass part 30, so that the process of connecting the first elastic member 40 and the second elastic member 70 to the second mass part 30 can be performed together, the problem of increasing the process caused by connecting the first elastic member 40 and the second elastic member 70 to the second mass part 30 through two processes can be avoided, and the manufacturing process of the speaker can be simplified. The first elastic member 40 may be at least two and spaced apart from each other as described in the above embodiments, or may be a ring-shaped one as a whole, which is not limited herein.

For example, fig. 2 and 3 show that at least two first elastic members 40 are arranged at intervals along the circumferential direction of the second mass part 30, and two first elastic members 40 are arranged opposite to each other in the radial direction of the second mass part 30, which is beneficial to ensuring the transmission effect between the first mass part 20 and the second mass part 30. Moreover, at least two second elastic pieces 70 are arranged at intervals along the circumferential direction of the second mass part 30, and every two second elastic pieces 70 are arranged oppositely in the radial direction of the second mass part 30, and the beneficial effects thereof have been explained in the above embodiments, and are not described again here. Wherein the first elastic member 40 and the second elastic member 70 are attached to the same position on the second mass member 30.

Of course, in other embodiments of the present invention, the first elastic element 40 and the second elastic element 70 may be connected to two opposite sides of the second mass member 30, and the like, and are not limited to the same position where the first elastic element 40 and the second elastic element 70 are connected to the second mass member 30, and are not limited herein.

Referring to fig. 5, fig. 5 is a schematic cross-sectional structure diagram of a speaker according to another embodiment of the present invention.

In an alternative embodiment, the limitation of the relative position of the second mass element 30 in the radial direction is not limited to the use of the second elastic member as set forth in the above embodiment, and specifically, the voice coil cavity 61 may be filled with the viscous medium 90, and the viscous medium 90 is used to provide viscous resistance to the first mass element 20 and the second mass element 30 to limit the relative position of the two in the radial direction.

Further, the viscous medium 90 may be magnetic liquid or the like, which has certain viscosity and can be magnetized to have magnetism under the action of an external magnetic field, so that the viscous medium 90 is better retained in the voice coil cavity 61 and does not splash out of the voice coil cavity 61 along with the movement of the first mass part 20 and the second mass part 30. Wherein the aforementioned externally applied magnetic field may be provided by the magnetic circuit assembly 60, in particular, the magnetic circuit assembly 60 is used for driving the magnetic field of the first mass part 20 and the second mass part 30 to move.

Please continue to refer to fig. 2 and 3. In one embodiment, the diaphragm 10 includes a ball top 11 and a corrugated portion 12 connecting outer edges of the ball top 11 and surrounding the ball top 11, and the first mass member 20 connects the ball top 11. The outer edge of the loop portion 12 is preferably fixed to the frame 80, and the loop portion 12 functions as an elastic member matching the vibration of the dome portion 11 to vibrate to sound in cooperation with the dome portion 11. In which the ball top 11 shown in fig. 2 and 3 is arranged in a plane.

Fig. 6 shows a simulation comparison of acoustic curves of the speaker of the dual resonance system of the present embodiment and the speaker of the conventional single resonance system. It can be seen that, the acoustic curve (i.e. curve i) of the speaker of this embodiment has a drop of 10dB at about 200Hz compared with the acoustic curve (i.e. curve ii) of the speaker of the conventional single resonance system, and it can be seen that the low-frequency acoustic curve of the closed field before the first resonance frequency of the speaker of this embodiment is adjusted and is no longer a smooth curve, which is beneficial to restoring the sound signal in the closed field, i.e. the effect of the speaker in restoring the sound signal can be improved, and the user can be provided with the best acoustic feeling.

In summary, the speaker provided by the present invention is designed with only one diaphragm, that is, with a single radiation surface design, compared with the conventional speaker with multiple speaker units, the volume of the speaker is reduced, and the mutual influence and interference between the diaphragm radiation surfaces of different speaker units are avoided, so that the effect of the speaker in restoring the sound signal can be improved. Meanwhile, the first mass part and the second mass part drive the vibrating diaphragm to vibrate and sound, namely the first mass part and the second mass part form a multi-resonance system, and a low-frequency acoustic curve of a closed field before the first resonance frequency of the loudspeaker can be adjusted to form a resonance peak valley, so that the effect of the loudspeaker for reducing sound signals can be further improved, and the user can feel acoustic with the best quality.

In addition, in the present invention, unless otherwise expressly specified or limited, the terms "connected," "stacked," and the like are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

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

vibrating diaphragm;

a first mass member connected to the diaphragm and a second mass member connected to the first mass member through a first elastic member, wherein the first mass member or the second mass member has a voice coil;

and the magnetic circuit component is used for generating a magnetic field so that when the voice coil is electrified and under the action of the magnetic field, the mass component without the voice coil is driven by the mass component with the voice coil to move, and then the first mass component and the second mass component drive the vibrating diaphragm to vibrate and sound together.

2. A loudspeaker according to claim 1, wherein the second mass part is located on a side of the first mass part remote from the diaphragm.

3. The speaker according to claim 1 or 2, wherein the speaker comprises at least two of the first elastic members, the at least two first elastic members being disposed at intervals from each other in a circumferential direction of the first mass member and the second mass member.

4. The speaker of claim 1 or 2, wherein the first elastic member is ring-shaped, and opposite sides of the first elastic member are connected to the first mass member and the second mass member, respectively.

5. The loudspeaker of claim 2, wherein the magnetic circuit assembly has a voice coil cavity in which the magnetic field is formed, at least part of the first mass member and the second mass member being located in the voice coil cavity, wherein the first mass member and the second mass member move in an axial direction of the voice coil cavity.

6. The loudspeaker of claim 1, further comprising a second elastic member having one end connected to the second mass member and the other end fixed, the second elastic member being configured to provide a radial support force to the second mass member to limit the relative position of the second mass member in the radial direction.

7. The loudspeaker of claim 6, further comprising a frame, wherein the magnetic circuit assembly has a groove formed therein, and an end of the second elastic member remote from the second mass member is fixed to the frame through the groove.

8. The loudspeaker of claim 6, wherein the second spring is attached to the second mass at a location where the first spring is attached.

9. The loudspeaker of claim 1, wherein the magnetic circuit assembly has a voice coil cavity in which at least part of the first mass member and the second mass member are located, wherein the voice coil cavity is filled with a viscous medium for providing viscous resistance to the first mass member and the second mass member to limit their relative positions in a radial direction.

10. The loudspeaker of claim 1, wherein the diaphragm comprises a spherical top portion and a flexure portion connected to an outer edge of and surrounding the spherical top portion, the first mass member being connected to the spherical top portion.