CN111131977B

CN111131977B - Loudspeaker

Info

Publication number: CN111131977B
Application number: CN202010148057.1A
Authority: CN
Inventors: 令狐荣林; 章统; 肖波
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2021-02-26
Anticipated expiration: 2040-03-05
Also published as: WO2021174569A1; CN111131977A

Abstract

The invention provides a loudspeaker capable of improving effective vibration area, which comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm, a voice coil for driving the vibrating diaphragm to vibrate and generate sound and a framework, the vibrating diaphragm comprises an upper vibrating diaphragm and a lower vibrating diaphragm which are oppositely and alternately arranged, the outer edges of the upper vibrating diaphragm and the lower vibrating diaphragm are fixed on the shell, the lower vibrating diaphragm is arranged around the magnetic circuit system, the framework comprises a connecting part connected with the upper vibrating diaphragm and a connecting frame which is connected with the connecting part and is arranged around the magnetic circuit system, the inner edge of the lower vibrating diaphragm is fixed on the connecting frame, wherein a clamping plate which is arranged around the connecting frame and fixed on the shell is arranged between the upper vibrating diaphragm and the lower vibrating diaphragm, the inner space of the shell is divided into an upper diaphragm front cavity for the upper diaphragm to sound, a lower diaphragm front cavity for the lower diaphragm to sound and a rear cavity shared by the upper diaphragm and the lower diaphragm by the upper diaphragm, the lower diaphragm, the clamping plate and the connecting frame; the shell is provided with a first sound outlet hole communicated with the upper membrane front cavity and a second sound outlet hole communicated with the lower membrane front cavity in a penetrating mode.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of acoustoelectric, in particular to a loudspeaker applied to portable electronic products.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. At present, the functions of a mobile phone are very diverse, one of which is a high-quality music function, and thus, a speaker for playing sound is widely applied to the current smart mobile devices.

The loudspeaker comprises a box body with a containing cavity and a sounding device arranged in the box body, wherein a sounding hole is formed in the box body in a penetrating mode. The sound-generating device in the related art has only one sound-generating surface, which is disadvantageous to the improvement of the sensitivity of the speaker.

Therefore, there is a need to provide a new speaker to solve the above technical problems.

[ summary of the invention ]

The invention provides a loudspeaker which can improve the effective vibration area and improve the sensitivity of the loudspeaker.

In order to achieve the above object, the present invention provides a speaker, comprising a vibration system and a magnetic circuit system for driving the vibration system to vibrate and generate sound, wherein the magnetic circuit system has a magnetic gap, the vibration system comprises a diaphragm and a voice coil inserted into the magnetic gap and driving the diaphragm to vibrate and generate sound, the speaker further comprises a housing for accommodating and fixing the vibration system and the magnetic circuit system, the housing has an accommodating space, the accommodating space is divided into an upper diaphragm front cavity, a lower diaphragm front cavity and a rear cavity by the vibration system and the magnetic circuit system, a first sound outlet communicated with the upper diaphragm front cavity and a second sound outlet communicated with the lower diaphragm front cavity are arranged on the housing in a penetrating manner, the diaphragm comprises an upper diaphragm and a lower diaphragm which are arranged oppositely and at an interval, outer edges of the upper diaphragm and the lower diaphragm are fixed on the housing, the lower vibrating diaphragm is arranged around the magnetic circuit system, the vibrating system further comprises a framework, the framework comprises a connecting part connected with the upper vibrating diaphragm and a connecting frame connected with the connecting part and arranged around the magnetic circuit system, the inner edge of the lower vibrating diaphragm is fixed on the connecting frame, a clamping plate which is arranged around the connecting frame and fixed on the shell is arranged between the upper vibrating diaphragm and the lower vibrating diaphragm, and the inner space of the shell is divided into an upper diaphragm front cavity used for the upper vibrating diaphragm to sound, a lower diaphragm front cavity used for the lower vibrating diaphragm to sound and a back cavity shared by the upper vibrating diaphragm and the lower vibrating diaphragm by the upper vibrating diaphragm, the lower vibrating diaphragm, the clamping plate and the connecting frame; and a first sound outlet hole communicated with the upper membrane front cavity and a second sound outlet hole communicated with the lower membrane front cavity penetrate through the shell.

Preferably, the connecting part and the connecting frame are arranged at intervals along the vibration direction and are connected through a connecting rib.

Preferably, two opposite sides of the connecting portion along the vibration direction are respectively connected with the voice coil and the upper diaphragm.

Preferably, go up the vibrating diaphragm and include membrane body and dome, the membrane body includes a roll over ring portion, certainly roll over the fixed part that the ring portion outwards extended and form and certainly roll over the flat portion that the ring portion inwards extended and form, the fixed part is fixed on the shell, wherein, the dome along the relative both sides of vibration direction respectively with flat portion with connecting portion connect, perhaps, flat portion along the relative both sides of vibration direction respectively with the dome with connecting portion connect.

Preferably, the opening of the folded ring part faces the splint.

Preferably, the flat portion has a cut-out central aperture, the dome covering the cut-out central aperture.

Preferably, the connecting portion has a ring structure.

Preferably, the inner edge of the lower diaphragm is fixed on the surface of the connecting frame away from the upper diaphragm.

Preferably, the clamping plate includes a holding portion fixed to the housing, a first extending portion formed by bending and extending from one end of the holding portion away from the housing toward the lower diaphragm direction, and a second extending portion formed by bending and extending from one end of the first extending portion away from the holding portion toward the connecting frame direction, and the second extending portion and the connecting frame are arranged at an interval.

Preferably, the first sound outlet hole and the second sound outlet hole are located on the same side wall of the housing.

Preferably, the casing includes a front cover, a middle frame and a rear cover sequentially arranged along a vibration direction, an outer edge of the upper diaphragm is clamped between the front cover and the middle frame, an outer edge of the lower diaphragm is clamped between the middle frame and the rear cover, the clamping plate is fixed to the middle frame, the magnetic circuit system is fixed to the rear cover, the upper diaphragm and the front cover enclose to form the upper diaphragm front cavity, the clamping plate faces the surface of the lower diaphragm and the connecting frame, the lower diaphragm and the middle frame enclose to form the lower diaphragm front cavity, wherein the first sound outlet is located on the front cover, and the second sound outlet is located on the middle frame.

Compared with the prior art, the loudspeaker provided by the invention can make the effective vibration area of the loudspeaker greatly improved by vibrating the upper vibrating diaphragm and the lower vibrating diaphragm to generate sound so as to improve the sensitivity of the loudspeaker; meanwhile, the inner edge of the lower vibrating diaphragm is fixed on the connecting frame, so that the lower vibrating diaphragm can increase the effective vibration area and simultaneously inhibit the swinging of the voice coil during large amplitude, and the problem of acoustic short circuit caused by the communication of the rear cavity and the lower diaphragm front cavity can be avoided, thereby improving the performance of the product. In addition, the mutual influence of the rear cavity and the lower film front cavity can be adjusted by adjusting the distance between the connecting frame and the clamping plate, so that the product performance can be adjusted.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is an exploded view of a preferred embodiment of a speaker according to the present invention;

fig. 2 is a schematic assembled structure of the loudspeaker shown in fig. 1;

FIG. 3 is a cross-sectional view of the loudspeaker of FIG. 2 taken along the line A-A;

FIG. 4 is a cross-sectional view of the loudspeaker of FIG. 2 taken along the direction B-B;

fig. 5 is a schematic structural diagram of a framework in the loudspeaker shown in fig. 1.

[ detailed description ] embodiments

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

Referring to fig. 1 to 5, the speaker 100 includes a housing 1, a vibration system 3 and a magnetic circuit system 5. The shell 1 accommodates and holds the vibration system 3 and the magnetic circuit system 5, and the magnetic circuit system 5 drives the vibration system 3 to vibrate and sound.

The housing 1 is provided with a first sound outlet 1A and a second sound outlet 1B. As shown in fig. 2, the first sound emitting hole 1A and the second sound emitting hole 1B are located on the same side wall of the housing 1.

The magnetic circuit system 5 includes a yoke 51 held in the housing 1, a main magnet 53 and an auxiliary magnet 55 fixed to the yoke 51, a main pole core 57 fixed to the main magnet 53, and an auxiliary pole core 59 fixed to the auxiliary magnet 57, the auxiliary magnet 55 being disposed around the main magnet 53 with a magnetic gap 5A formed therebetween. As shown in fig. 3 and 4, the main pole piece 57 and the sub pole piece 59 are located in the same horizontal plane.

The auxiliary magnet 55 may be a ring magnet having a ring structure, or may be a bar magnet disposed around the main magnet 53. As shown in fig. 1, the secondary magnet 55 is a bar magnet, and four secondary magnets 55 are provided, namely two first secondary magnets spaced along the short axis of the main magnet 53 and two second secondary magnets spaced along the long axis of the main magnet 53.

In this embodiment, the auxiliary pole core 59 may be a ring-shaped pole core having a ring-shaped structure, or may be a strip-shaped pole core. As shown in fig. 1, the sub-pole piece 59 is a ring-shaped pole piece fixed to the two first sub-magnets and the two second sub-magnets.

In the present embodiment, the primary magnet 53 and the secondary magnet 55 are both magnetic steel. It is understood that the primary magnet 53 and the secondary magnet 55 may be natural magnets.

The yoke 51, the main pole piece 57, and the auxiliary pole piece 59 are made of a magnetic conductive material. The magnetic flux in the magnetic gap 5A can be effectively increased by the magnetic conduction action of the yoke 51, the main pole core 57, and the auxiliary pole core 59, so that the acoustic performance of the speaker 100 can be improved, and the speaker 100 can be designed to be light and thin.

The vibration system 3 comprises a diaphragm 31, a voice coil 33 inserted into the magnetic gap 5A and driving the diaphragm 31 to vibrate and sound, and a framework 35.

The diaphragm 31 includes an upper diaphragm 37 and a lower diaphragm 39 that are disposed opposite to each other and at an interval, outer edges of the upper diaphragm 37 and the lower diaphragm 39 are fixed on the housing 1, and the lower diaphragm 39 is disposed around the magnetic circuit system 5.

The framework 35 includes a connecting portion 351 connected to the upper diaphragm 37 and a connecting frame 353 connected to the connecting portion 351 and disposed around the magnetic circuit system 5, and an inner edge of the lower diaphragm 39 is fixed to the connecting frame 353.

Wherein a clamping plate 7 which is arranged around the connecting frame 353 and fixed on the housing 1 is arranged between the upper diaphragm 37 and the lower diaphragm 39, and the upper diaphragm 37, the lower diaphragm 39, the clamping plate 7 and the connecting frame 353 divide the internal space 1a of the housing 1 into an upper film front cavity 11a for the sound production of the upper diaphragm 37, a lower film front cavity 13a for the sound production of the lower diaphragm 39 and a rear cavity 15a which is shared by the upper diaphragm 37 and the lower diaphragm 39 (specifically, the surface of the upper diaphragm 37 facing away from the lower diaphragm 39 and the housing 1 enclose the upper film front cavity 11a, the surface of the clamping plate 7 facing the lower diaphragm 39, the connecting frame 353, the lower diaphragm 39 and the housing 1 enclose the lower film front cavity 13 a; the internal space 1a except the sound space of the upper film front cavity 11a and the lower film front cavity 13a is the rear cavity 15a), the upper membrane front cavity 11A is communicated with the first sound outlet hole 1A, and the lower membrane front cavity 13a is communicated with the second sound outlet hole 1B. After the voice coil 33 is energized, the upper diaphragm 37, the lower diaphragm 39 and the bobbin 35 vibrate together with the voice coil 33 under the magnetic force of the magnetic circuit system 5. Since the sound wave generated by the vibration of the upper diaphragm 37 is radiated to the outside of the speaker 100 through the upper diaphragm front cavity 11A and the first sound outlet 1A, and the sound wave generated by the vibration of the lower diaphragm 39 is radiated to the outside of the speaker 100 through the lower diaphragm front cavity 13a and the second sound outlet 1B, the effective vibration area of the speaker 100 is greatly increased to improve the sensitivity of the speaker; meanwhile, the inner edge of the lower diaphragm 39 is fixed on the connection frame 353, so that the lower diaphragm 39 not only increases the effective vibration area, but also suppresses the swing of the voice coil 33 during large amplitude, and the problem of acoustic short circuit caused by the communication of the lower diaphragm 39 at the connection position of the connection frame 353 between the rear cavity 15a and the lower diaphragm front cavity 13a can be avoided, so that the performance of the product can be improved, and especially for a loudspeaker with ultra-large amplitude, the effect is more obvious. In addition, the distance between the connecting frame 353 and the clamping plate 7 can be adjusted to adjust the mutual influence of the rear cavity 15a and the lower film front cavity 13a, so that the product performance can be adjusted.

It should be noted that the joint between the splint 7 and the connection frame 353 cannot physically block air, and the smaller the gap width at the joint between the splint 7 and the connection frame 353 is, the larger the acoustic resistance is, and the smaller the risk of the acoustic short circuit occurring between the rear cavity 15a and the lower membrane front cavity 13a is. Therefore, by adjusting the distance between the connecting frame 353 and the clamping plate 7, the mutual influence of the rear cavity 15a and the lower film front cavity 13a can be adjusted, so that the product performance can be adjusted.

The clamping plate 7 includes a holding portion 71 fixed to the housing 1, a first extending portion 73 formed by bending and extending from one end of the holding portion 71 away from the housing 1 to the direction of the lower diaphragm 39, and a second extending portion 75 formed by bending and extending from one end of the first extending portion 73 away from the holding portion 71 to the direction of the connecting frame 353, wherein the second extending portion 75 and the connecting frame 353 are arranged at an interval. This effectively increases the volume of the lower diaphragm front chamber 13a, and thus the vibration performance of the lower diaphragm 39 can be improved.

As shown in fig. 3 and 4, the inner edge of the lower diaphragm 39 is fixed to the surface of the connection frame 353 remote from the upper diaphragm 37. It is understood that, in other embodiments, the inner edge of the lower diaphragm 39 may also be fixed on the surface of the connecting frame 353 facing the side of the magnetic circuit system 5, or the inner edge of the lower diaphragm 39 may be fixed on the surface of the connecting frame 353 facing away from the side of the magnetic circuit system 5.

As shown in fig. 3, 4 and 5, the connecting portion 351 and the connecting frame 353 are spaced apart from each other in the vibration direction X and connected to each other by a connecting rib 355.

As shown in fig. 3 and 4, the connection portions 351 are connected to the voice coil 33 and the upper diaphragm 37 at opposite sides in the vibration direction X, respectively.

The upper diaphragm 37 includes a diaphragm body 371 and a dome 373, the diaphragm body 371 includes a folded ring portion 375, a fixing portion 377 formed by extending the folded ring portion 375 outwards and a flat portion 379 formed by extending the folded ring portion 375 inwards, and the fixing portion 377 is fixed on the housing 1. As shown in fig. 3 and 4, opposite sides of the dome 373 in the vibration direction X are connected to the flat portion 379 and the connection portion 353, respectively. It is understood that, in other embodiments, two opposite sides of the flat portion 379 in the vibration direction X are respectively connected to the dome 373 and the connection portion 351.

In this embodiment, the opening of the loop portion 375 faces the clamping plate 7. This makes it possible to make the upper diaphragm 37 and the lower diaphragm 39 have a sufficient vibration space.

In this embodiment, the connecting portion 353 has a ring structure. It is understood that in other embodiments, the connecting portion may have a flat plate shape, and when the connecting portion has a flat plate shape, the connecting portion may also function as a dome (that is, the dome 373 may not be provided).

In this embodiment, the flat portion 379 has a cut-out center hole 37A, and the dome 373 covers the cut-out center hole 37A. It is understood that in other embodiments, the flat 379 may not have the cut-in hole.

The housing 1 includes a front cover 11, a middle frame 13 and a rear cover 15 sequentially arranged along a vibration direction X, an outer edge of the upper diaphragm 37 is clamped between the front cover 11 and the middle frame 13, an outer edge of the lower diaphragm 39 is clamped between the middle frame 13 and the rear cover 15, the clamp plate 7 is fixed to the middle frame 13, the magnetic circuit system 5 is fixed to the rear cover 1, the upper diaphragm 37 and the front cover 11 enclose the upper diaphragm front cavity 11A, a surface of the clamp plate 7 facing the lower diaphragm 39, the connecting frame 353, the lower diaphragm 39 and the middle frame 13 enclose the lower diaphragm front cavity 13a, wherein the first sound outlet hole 1A is located on the front cover 11, and the second sound outlet hole 1B is located on the middle frame 13.

Compared with the related art, the loudspeaker of the invention can make the effective vibration area of the loudspeaker 100 greatly increased by vibrating the upper diaphragm 37 and the lower diaphragm 39 to generate sound so as to improve the sensitivity of the loudspeaker; meanwhile, the inner edge of the lower diaphragm 39 is fixed on the connecting frame 353, so that the lower diaphragm 39 not only increases the effective vibration area, but also suppresses the swing of the voice coil 33 during large amplitude, and the problem of acoustic short circuit caused by the communication between the rear cavity 15a and the lower diaphragm front cavity 13a can be avoided, thereby improving the performance of the product. In addition, the distance between the connecting frame 353 and the clamping plate 7 can be adjusted to adjust the mutual influence of the rear cavity 15a and the lower film front cavity 13a, so that the product performance can be adjusted.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a loudspeaker, includes vibration system and drive the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system includes the vibrating diaphragm and inserts in the magnetic gap and drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, a serial communication port, loudspeaker still including accommodating and fixing vibration system with magnetic circuit's shell, the vibrating diaphragm includes relative just last vibrating diaphragm and the lower vibrating diaphragm that the interval set up, go up the vibrating diaphragm with the outward flange of lower vibrating diaphragm is fixed in on the shell, the vibrating diaphragm encircles down the magnetic circuit sets up, vibration system still includes the skeleton, the skeleton include with go up connecting portion that the vibrating diaphragm is connected and with connecting portion connect and encircle the connection box that magnetic circuit set up, the inward flange of lower vibrating diaphragm is fixed on the connection box, wherein, go up the vibrating diaphragm with be equipped with between the lower vibrating diaphragm and encircle the connection box sets up and is fixed in the splint of shell The upper vibrating diaphragm, the lower vibrating diaphragm, the clamping plate and the connecting frame divide the inner space of the shell into an upper diaphragm front cavity for the upper vibrating diaphragm to sound, a lower diaphragm front cavity for the lower vibrating diaphragm to sound and a rear cavity shared by the upper vibrating diaphragm and the lower vibrating diaphragm; and a first sound outlet hole communicated with the upper membrane front cavity and a second sound outlet hole communicated with the lower membrane front cavity penetrate through the shell.

2. The loudspeaker of claim 1, wherein the connecting portion and the connecting frame are spaced apart in the vibration direction and connected by a connecting rib.

3. The speaker of claim 2, wherein opposite sides of the connection portion in the vibration direction are connected to the voice coil and the upper diaphragm, respectively.

4. The loudspeaker of claim 3, wherein the upper diaphragm comprises a diaphragm body and a dome, the diaphragm body comprises a folded ring portion, a fixing portion extending outward from the folded ring portion, and a flat portion extending inward from the folded ring portion, the fixing portion is fixed on the housing, wherein two opposite sides of the dome in the vibration direction are connected to the flat portion and the connecting portion, respectively, or two opposite sides of the flat portion in the vibration direction are connected to the dome and the connecting portion, respectively.

5. The speaker of claim 4, wherein the opening of the loop portion faces the clip.

6. The loudspeaker of claim 4 wherein said flat portion has a cut-out center hole, said dome covering said cut-out center hole.

7. A loudspeaker according to claim 3, wherein the connecting portion is of annular configuration.

8. The loudspeaker of claim 1, wherein the inner edge of the lower diaphragm is fixed to a surface of the connection frame remote from the upper diaphragm.

9. The loudspeaker of claim 1, wherein the clamp plate comprises a holding portion fixed to the housing, a first extending portion bent and extended from an end of the holding portion away from the housing toward the lower diaphragm, and a second extending portion bent and extended from an end of the first extending portion away from the holding portion toward the connection frame, the second extending portion being spaced apart from the connection frame.

10. The loudspeaker of claim 1 wherein said first sound outlet and said second sound outlet are located on the same side wall of said enclosure.

11. The loudspeaker according to any one of claims 1 to 10, wherein the housing includes a front cover, a middle frame, and a rear cover sequentially arranged along a vibration direction, an outer edge of the upper diaphragm is sandwiched between the front cover and the middle frame, an outer edge of the lower diaphragm is sandwiched between the middle frame and the rear cover, the clamp plate is fixed to the middle frame, the magnetic circuit is fixed to the rear cover, the upper diaphragm and the front cover enclose the upper diaphragm front cavity, and the clamp plate, the connection frame, the lower diaphragm, and the middle frame enclose the lower diaphragm front cavity, wherein the first sound outlet is located on the front cover, and the second sound outlet is located on the middle frame.