CN110536217B

CN110536217B - Loudspeaker

Info

Publication number: CN110536217B
Application number: CN201910591137.1A
Authority: CN
Inventors: 邱志强; 汪晶晶; 刘莎莎
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-06-29
Filing date: 2019-07-02
Publication date: 2021-02-26
Anticipated expiration: 2039-07-02
Also published as: CN110536217A; WO2021000119A1

Abstract

The invention provides a loudspeaker which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame, the vibration system comprises a vibration diaphragm fixed on the basin frame and a voice coil for driving the vibration diaphragm to vibrate and sound, the vibration diaphragm comprises a ball top, and two ends of the ball top along the vibration direction are of a microporous structure. Compared with the prior art, the loudspeaker provided by the invention has the advantages that the two ends of the dome along the vibration direction are arranged into the microporous structures, so that when the loudspeaker is assembled into the loudspeaker box, the airflow noise in the front cavity of the loudspeaker box can be effectively reduced, and the aims of improving the performance and the tone quality are fulfilled.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of electroacoustic conversion, in particular to a loudspeaker.

[ 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 of the related art includes the basin frame and is fixed in vibration system and the magnetic circuit of basin frame respectively, vibration system is including being fixed in the vibrating diaphragm and the drive of basin frame the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, the vibrating diaphragm includes the ball top.

However, the speaker of the related art mostly uses a common aluminum or wood dome, and both ends of the dome in the vibration direction are smooth surfaces, so that when the speaker of the related art is placed in a speaker box, the speaker box has obvious front cavity resonance, and the energy is too high near the high frequency resonance, which usually obviously amplifies distortion and noise.

Therefore, it is necessary to provide a new speaker to solve the above problems.

[ summary of the invention ]

The invention aims to provide a loudspeaker which can effectively reduce airflow noise in a front cavity and improve performance and tone quality.

In order to solve the technical problem, the invention provides a loudspeaker which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame, the vibration system comprises a vibration diaphragm fixed on the basin frame and a voice coil for driving the vibration diaphragm to vibrate and produce sound, the vibration diaphragm comprises a ball top, and two ends of the ball top along the vibration direction are of a microporous structure.

Preferably, the material of the ball top is foamed metal.

Preferably, the dome comprises a first layer close to the voice coil, a second layer far away from the voice coil and a middle layer connecting the first layer and the second layer, the first layer and the second layer are made of foamed metal, and the middle layer is an aluminum foil layer.

Preferably, the foamed metal is foamed aluminum or foamed nickel.

Preferably, the first layer includes a first body portion and a plurality of first through holes penetrating through the first body portion in the vibration direction, the second layer includes a second body portion and a plurality of second through holes penetrating through the second body portion in the vibration direction, the aperture of the first through hole is the same as that of the second through hole, and each of the first through holes is disposed opposite to one of the second through holes in the vibration direction.

Preferably, the first through holes and the second through holes are arranged in an array, the distance between the first through holes in each row is the same, the distance between the second through holes in each row is the same, the distance between the first through holes in each row is the same, and the distance between the second through holes in each row is the same.

Preferably, the first layer further includes a plurality of third through holes penetrating through the first body portion along the vibration direction, the second layer further includes a plurality of fourth through holes penetrating through the second body portion along the vibration direction, an aperture of the third through hole is the same as an aperture of the fourth through hole, and the apertures of the third through hole and the fourth through hole are smaller than the apertures of the first through hole and the second through hole.

Preferably, the third through holes and the fourth through holes are arranged in an array, the distance between the third through holes in each row is the same, the distance between the fourth through holes in each row is the same, the distance between the third through holes in each row is the same, and the distance between the fourth through holes in each row is the same.

Preferably, the cross section of the ball top in the vibration direction is rectangular, and along the length direction of the ball top, each row of the first through holes and each row of the third through holes are sequentially and alternately arranged, each row of the second through holes and each row of the fourth through holes are sequentially and alternately arranged, and along the width direction of the ball top, each row of the first through holes and each row of the third through holes are sequentially and alternately arranged, and each row of the second through holes and each row of the fourth through holes are sequentially and alternately arranged.

Compared with the prior art, the loudspeaker has the advantages that the two ends of the ball top along the vibration direction are of the microporous structures, so that the microporous structures have larger sound damping, the energy of the front cavity resonance peak can be effectively reduced, the distortion is reduced, and the amplification effect of high-frequency resonance on noise is reduced; meanwhile, the microporous structure can improve the flow direction of the air flow in the loudspeaker, so that the air flow can flow through the microporous structure except for a conventional path, and the air in the gap inside the microporous structure has stronger damping and can be used for absorbing high-frequency noise.

[ 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 a schematic perspective view of a speaker according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of the speaker shown in fig. 1;

FIG. 3 is an enlarged view of portion A of the loudspeaker shown in FIG. 2;

fig. 4 is an exploded perspective view of a dome of a speaker according to an embodiment of the present invention;

fig. 5 is a schematic cross-sectional view of a three-dimensional structure of a speaker according to a second embodiment of the present invention;

fig. 6 is an enlarged view of a portion B of the speaker shown in fig. 5.

[ 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.

Example one

Referring to fig. 1 to 3, the present invention provides a speaker 100, wherein the speaker 100 includes a frame 11, a vibration system 13 and a magnetic circuit system 15 respectively fixed to the frame 11.

The vibration system 13 includes a diaphragm 131 fixed to the frame 11 and a voice coil 133 driving the diaphragm 131 to vibrate and generate sound.

The diaphragm 131 includes a dome 1311, a vibrating portion 1313 connected to the dome 1311, a corrugated portion 1315 extending outward from the vibrating portion 1313, and a fixing portion 1317 extending outward from the corrugated portion 1315. The fixing portion 1317 is fixedly connected to the frame 11, so that the diaphragm 131 is fixed to the frame 11.

The vibration part 1313 is connected to the dome 1311 in the vibration direction, and in the present embodiment, the vibration part 1313 has a ring shape, and the vibration part 1313 is fixedly connected to the peripheral edge of the dome 1311.

The cross section of the dome 1311 in the vibration direction is rectangular, and two ends of the dome 1311 in the vibration direction are of a microporous structure. Because of the microporous structure possesses great acoustic damping, can effectively reduce the energy of front cavity resonance peak, reduce the amplification effect of high frequency resonance to the noise when reducing the distortion, simultaneously, microporous structure can also improve the air current flow direction in speaker 100 for the air current can also flow through microporous structure except conventional route, and the air in the microporous structure internal gap has stronger damping, can be used for absorbing high frequency noise equally.

Specifically, referring to fig. 4, in the present embodiment, the dome 1311 includes a first layer 1321 close to the voice coil 133, a second layer 1323 far from the voice coil 133, and an intermediate layer 1325 connecting the first layer 1321 and the second layer 1323. Meanwhile, the first layer 1321 and the second layer 1323 are made of foamed metal, and the intermediate layer 1325 is an aluminum foil layer.

The foamed metal includes foamed aluminum, foamed nickel, and the like, and in the present embodiment, the foamed metal is foamed aluminum.

The foamed metal is used as the material of the first layer 1321 and the second layer 1323, and the foamed metal has the characteristic of a microporous structure, so that the technical effect of improving the acoustic performance of the loudspeaker 100 is achieved.

Furthermore, the effect of adjusting the noise of different frequency bands can be achieved by combining the pore diameter and the distribution position in the microporous structure. In this embodiment, the first layer 1321 includes a first layer body portion 1341, a plurality of first through holes 1343 penetrating the first body portion 1341 in the vibration direction, and a plurality of third through holes 1345 penetrating the first body portion 1341 in the vibration direction.

The second layer 1323 includes a second body portion 1361, a plurality of second through holes 1363 penetrating the second body portion 1361 in the vibration direction, and a plurality of fourth through holes 1365 also penetrating the second body portion 1361 in the vibration direction.

The cross-sectional shapes of the first through hole 1343, the second through hole 1363, the third through hole 1345, and the fourth through hole 1365 may be a circle, a triangle, an ellipse, a square, or the like, and in the present embodiment, the cross-sectional shape of the through hole is a circle.

Preferably, the apertures of the first through holes 1343 are the same as the apertures of the second through holes 1363, and each of the first through holes 1343 is disposed opposite to one of the second through holes 1363 in the vibration direction.

The plurality of first through holes 1343 and the plurality of second through holes 1363 are arranged in an array, and the pitch between each row of the first through holes 1343 is the same, the pitch between each row of the second through holes 1363 is the same, the pitch between each row of the first through holes 1343 is the same, and the pitch between each row of the second through holes 1363 is the same.

The aperture of the third through hole 1345 is the same as the aperture of the fourth through hole 1365, and the apertures of the third through hole 1345 and the fourth through hole 1365 are smaller than the apertures of the first through hole 1343 and the second through hole 1363.

The third through holes 1345 and the fourth through holes 1365 are arranged in an array, the distance between each row of the third through holes 1345 is the same, the distance between each row of the fourth through holes 1365 is the same, the distance between each row of the third through holes 1345 is the same, and the distance between each row of the fourth through holes 1365 is the same.

Meanwhile, along the length direction of the dome 1311, each row of the first through holes 1343 and each row of the third through holes 1345 are alternately arranged in sequence, and each row of the second through holes 1363 and each row of the fourth through holes 1365 are alternately arranged in sequence; along the width direction of the dome 1311, each row of the first through holes 1343 and each row of the third through holes 1345 are alternately arranged in sequence, and each row of the second through holes 1363 and each row of the fourth through holes 1365 are alternately arranged in sequence.

Of course, the sizes and the position relationships among the first through hole 1343, the second through hole 1345, the third through hole 1363 and the fourth through hole 1365 are only one embodiment of the present invention, and the noise in a certain frequency band can be adjusted by such an arrangement. When different noise frequency bands need to be adjusted, more fifth through holes, sixth through holes and the like can be further formed in the first layer 1321 and the second layer 1323, and the position arrangement among the through holes can also be adjusted.

Example two

The speaker 200 provided in this embodiment is substantially the same as the speaker 100 provided in the first embodiment, and the difference is the structure of the dome 2311.

Referring to fig. 5 and 6, in the present embodiment, the dome 2311 is a plate-shaped structure made of a foamed metal material. Specifically, the foamed metal includes foamed aluminum, foamed nickel, and the like, and in the present embodiment, the foamed metal is foamed nickel.

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 the basin frame, is fixed in respectively the vibration system and the magnetic circuit of basin frame, vibration system is including being fixed in the vibrating diaphragm and the drive of basin frame the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, the vibrating diaphragm includes the ball top, its characterized in that, the ball top is many microporous structure along the both ends of vibration direction, the ball top is including being close to the first layer of voice coil loudspeaker voice coil, keeping away from the second layer and the connection of voice coil loudspeaker voice coil the first layer with the intermediate level of second layer, the first layer reaches the material on second layer is the foaming metal, the intermediate level is the aluminium foil layer, the vibrating diaphragm still includes vibration portion, vibration portion is cyclic annular, vibration portion with the periphery fixed connection of ball top, vibration portion in the vibration direction with the ball top is connected.

2. The loudspeaker of claim 1, wherein the foamed metal is foamed aluminum or foamed nickel.

3. The speaker of claim 2, wherein the first layer includes a first body portion and a plurality of first through holes penetrating the first body portion in the vibration direction, the second layer includes a second body portion and a plurality of second through holes penetrating the second body portion in the vibration direction, the first through holes have the same diameter as that of the second through holes, and each of the first through holes is disposed opposite to one of the second through holes in the vibration direction.

4. The speaker of claim 3, wherein the first through holes and the second through holes are arranged in an array, and the first through holes in each row have the same pitch, the second through holes in each column have the same pitch, the first through holes in each row have the same pitch, and the second through holes in each row have the same pitch.

5. The speaker of claim 4, wherein the first layer further includes a plurality of third through holes penetrating the first body portion in the vibration direction, wherein the second layer further includes a plurality of fourth through holes penetrating the second body portion in the vibration direction, wherein an aperture of the third through holes is the same as an aperture of the fourth through holes, and wherein the apertures of the third through holes and the fourth through holes are smaller than the apertures of the first through holes and the second through holes.

6. The speaker of claim 5, wherein the third through holes and the fourth through holes are arranged in an array, and the third through holes in each row have the same pitch, the fourth through holes in each column have the same pitch, the third through holes in each row have the same pitch, and the fourth through holes in each row have the same pitch.

7. The loudspeaker of claim 6, wherein the cross section of the dome in the vibration direction is rectangular, and each row of the first through holes and each row of the third through holes are sequentially and alternately arranged along the length direction of the dome, each row of the second through holes and each row of the fourth through holes are sequentially and alternately arranged, and each row of the first through holes and each row of the third through holes are sequentially and alternately arranged along the width direction of the dome, and each row of the second through holes and each row of the fourth through holes are sequentially and alternately arranged.