WO2021000119A1

WO2021000119A1 - Loudspeaker

Info

Publication number: WO2021000119A1
Application number: PCT/CN2019/094017
Authority: WO
Inventors: 邱志强; 汪晶晶; 刘莎莎
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-06-29
Filing date: 2019-06-29
Publication date: 2021-01-07
Also published as: CN110536217A; CN110536217B

Abstract

Provided is a loudspeaker, comprising a basket, and a vibration system and a magnetic circuit system respectively fixed to the basket, wherein the vibration system comprises a diaphragm fixed to the basket, and a voice coil driving the diaphragm to generate a sound by means of vibration; the diaphragm comprises a dome; and two ends, in a vibration direction, of the dome are of a microporous structure. Compared with the related technology, in the loudspeaker provided in the present application, the two ends, in the vibration direction, of the dome are configured to be of a microporous structure, such that when the loudspeaker is assembled inside a loudspeaker enclosure, the airflow noise in a front cavity of the loudspeaker enclosure can be effectively reduced, and the aim of improving the performance and tone is thus achieved.

Description

speaker

Technical field

This application relates to the field of electro-acoustic conversion, in particular to a speaker.

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and portable mobile terminal devices. At present, the functions of mobile phones are extremely diverse, one of which is high-quality music functions. Therefore, speakers for playing sound are widely used in current smart mobile devices.

technical problem

Related art speakers include a basin frame and a vibration system and a magnetic circuit system respectively fixed to the basin frame. The vibration system includes a diaphragm fixed to the basin frame and a voice coil that drives the diaphragm to vibrate and produce sound. The membrane includes the dome.

However, the speakers of the related technology mostly use ordinary aluminum or wooden dome, and the dome is smooth on both ends of the vibration direction. When the speaker of the related technology is placed in the speaker box, the speaker box has a clear front. Cavity resonance, and the energy is too high near the high frequency resonance, usually significantly amplify distortion and noise.

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

Technical solutions

The technical problem to be solved by this application is to provide a speaker that can effectively reduce the airflow noise in the front cavity and improve the performance and sound quality.

In order to solve the above technical problems, the present application provides a loudspeaker including a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system. The vibration system includes a diaphragm fixed to the basin frame and a driving station. In the voice coil with a vibrating diaphragm that produces sound, the diaphragm includes a dome, and both ends of the dome in a vibration direction are in a microporous structure.

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

Preferably, the dome includes a first layer close to the voice coil, a second layer far from the voice coil, and an intermediate layer connecting the first layer and the second layer. The first layer and The material of the second layer is foamed metal, and the intermediate 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 the first body portion along the vibration direction, and the second layer includes a second body portion and penetrating the first body portion along the vibration direction. A plurality of second through holes in the two body parts, the aperture of the first through hole is the same as the aperture of the second through hole, and each of the first through holes is connected to one of the second through holes in the vibration direction. The through holes are arranged oppositely.

Preferably, the plurality of first through holes and the plurality of second through holes are all arranged in an array, and the spacing between the first through holes in each row is the same, and the distance between the second through holes in each row The distance between 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 the first body portion along the vibration direction, and the second layer further includes a plurality of fourth through holes penetrating the second body portion along the vibration direction. A through hole, the diameter of the third through hole is the same as that of the fourth through hole, and the diameter of the third through hole and the fourth through hole is smaller than that of the first through hole and the second through hole. The aperture of the through hole.

Preferably, the plurality of third through holes and the plurality of fourth through holes are all arranged in an array, and the spacing between the third through holes in each row is the same, and the fourth through holes in each row The distance between 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 dome in the vibration direction is rectangular, and along the length direction of the dome, the first through holes in each row and the third through holes in each row are alternately arranged in turn, The second through holes and the fourth through holes in each column are alternately arranged in turn. Along the width direction of the dome, the first through holes in each row and the third through holes in each row are alternately arranged in turn. The second through holes and the fourth through holes in each row are alternately arranged in sequence.

Beneficial effect

Compared with the related art, the speaker of the present application is provided with a microporous structure at both ends of the dome in the vibration direction. Because the microporous structure has greater acoustic damping, it can effectively reduce the energy of the front cavity resonance peak. Reduce distortion while reducing the amplifying effect of high-frequency resonance on noise; at the same time, the microporous structure can improve the airflow direction in the speaker, so that the airflow can flow through the microporous structure in addition to the conventional path, and the microporous structure The air in the gap has strong damping and can also be used to absorb high-frequency noise.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

FIG. 1 is a schematic diagram of a three-dimensional structure of a speaker provided by Embodiment 1 of the application;

2 is a schematic cross-sectional view of the three-dimensional structure of the speaker shown in FIG. 1;

Figure 3 is an enlarged view of part A of the speaker shown in Figure 2;

4 is an exploded schematic diagram of the three-dimensional structure of the dome of the speaker provided in Embodiment 1 of the application;

FIG. 5 is a schematic cross-sectional view of the three-dimensional structure of the speaker provided in the second embodiment of the application;

Fig. 6 is an enlarged view of part B of the speaker shown in Fig. 5.

The best mode of the invention

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

Example one

Please refer to FIGS. 1 to 3 in combination. The present application provides a speaker 100. The speaker 100 includes a basin frame 11, a vibration system 13 and a magnetic circuit system 15 respectively fixed to the basin frame 11.

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

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

It should be noted that the vibrating portion 1313 is connected to the dome 1311 in the vibration direction, and in this embodiment, the vibrating portion 1313 has a ring shape, and the vibration portion 1313 is connected to the dome 1311. The peripheral edge is fixedly connected.

The cross section of the dome 1311 in the vibration direction is rectangular, and the two ends of the dome 1311 in the vibration direction have a microporous structure. Because the microporous structure has greater acoustic damping, it can effectively reduce the energy of the front cavity resonance peak, and reduce distortion while reducing the amplification effect of high-frequency resonance on noise. At the same time, the microporous structure can also improve the speaker 100 The airflow direction inside allows the airflow to flow through the microporous structure in addition to the conventional path, and the air in the internal gap of the microporous structure has strong damping, which can also be used to absorb high-frequency noise.

Specifically, please refer to FIG. 4 in combination. In this 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 a second layer 1323 connected to the first Layer 1321 and the middle layer 1325 of the second layer 1323. Meanwhile, the material of the first layer 1321 and the second layer 1323 is foamed metal, and the intermediate layer 1325 is an aluminum foil layer.

It should be noted that the foamed metal includes foamed aluminum, foamed nickel, etc. In this embodiment, the foamed metal is foamed aluminum.

The use of foamed metal as the material of the first layer 1321 and the second layer 1323 has the characteristics of a microporous structure, which has the technical effect of improving the acoustic performance of the speaker 100.

Further, by combining the apertures and distribution positions in the microporous structure, the effect of adjusting noise in different frequency bands can be achieved. 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 along the vibration direction, and also penetrating the first body along the vibration direction. A plurality of third through holes 1345 of the portion 1341.

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

It should be noted that the cross-sectional shape of the first through hole 1343, the second through hole 1363, the third through hole 1345, and the fourth through hole 1365 may be circular, triangular, oval, In this embodiment, the cross-sectional shape of the through hole is a circle.

Preferably, the aperture of the first through hole 1343 is the same as the aperture of the second through hole 1363, and each of the first through holes 1343 is arranged 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 all arranged in an array, and the spacing between the first through holes 1343 in each row is the same, and the second through holes 1363 in each row The distance between each row is the same, the distance between the first through holes 1343 in each row is the same, and the distance between the second through holes 1363 in each row 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 aperture of the third through hole 1345 and the fourth through hole 1365 is smaller than that of the first through hole 1343 and the The diameter of the second through hole 1363.

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

At the same time, along the length direction of the dome 1311, each column of the first through holes 1343 and each column of the third through holes 1345 are alternately arranged in turn, each column of the second through holes 1363 and each column of the first through holes 1363 The four through holes 1365 are arranged alternately 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 The fourth through holes 1365 are arranged alternately with each row.

Of course, the above-mentioned aperture size and positional relationship between 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 application, and this arrangement can be adjusted to Adjust the noise in a certain frequency band. When it is necessary to adjust different noise frequency bands, the first layer 1321 and the second layer 1323 can also be provided with more fifth through holes, sixth through holes, etc., and the positions of the through holes are arranged Can also be adjusted.

Example two

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

Please refer to FIGS. 5 and 6 in combination. In this embodiment, the dome 2311 is a plate-shaped structure made of foamed metal materials. Specifically, the foamed metal includes foamed aluminum, foamed nickel, etc. In this embodiment, the foamed metal is foamed nickel.

Compared with the related art, the speaker of the present application is provided with a microporous structure at both ends of the dome in the vibration direction. Because the microporous structure has greater acoustic damping, it can effectively reduce the energy of the front cavity resonance peak. Reduce distortion while reducing the amplifying effect of high-frequency resonance on noise; at the same time, the microporous structure can improve the flow direction of the airflow in the speaker, so that the airflow can flow through the microporous structure in addition to the conventional path, and the inside of the microporous structure The air in the gap has strong damping and can also be used to absorb high-frequency noise.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these all belong to this application. The scope of protection.

Embodiments of the invention

Type here a paragraph describing the embodiment of the present invention.

Industrial applicability

Type a paragraph describing industrial applicability here.

Sequence Listing Free Content

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Claims

A loudspeaker comprising a basin frame, a vibration system and a magnetic circuit system respectively fixed to the basin frame, the vibration system including a diaphragm fixed to the basin frame and a voice coil that drives the diaphragm to vibrate and produce sound, so The diaphragm includes a spherical top, which is characterized in that the two ends of the spherical top along the vibration direction have a microporous structure.
The speaker according to claim 1, wherein the material of the dome is foamed metal.
The speaker according to claim 1, wherein the dome includes a first layer close to the voice coil, a second layer far from the voice coil, and connecting the first layer and the second layer The material of the first layer and the second layer is foamed metal, and the intermediate layer is an aluminum foil layer.
The speaker according to claim 2 or 3, wherein the foamed metal is foamed aluminum or foamed nickel.
The speaker according to claim 3, wherein the first layer includes a first body portion and a plurality of first through holes penetrating the first body portion along the vibration direction, and the second layer includes a second The body portion and a plurality of second through holes penetrating the second body portion along the vibration direction, the diameter of the first through hole is the same as that of the second through hole, and each of the first through holes The vibration direction is opposite to one of the second through holes.
The speaker according to claim 5, wherein a plurality of the first through holes and a plurality of the second through holes are arranged in an array, and the spacing between the first through holes in each column is the same The distance between the second through holes in each column 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.
The speaker according to claim 6, wherein the first layer further includes a plurality of third through holes penetrating the first body portion along the vibration direction, and the second layer further includes a plurality of third through holes penetrating the vibration direction. The plurality of fourth through holes of the second body portion, the diameter of the third through hole is the same as the diameter of the fourth through hole, and the diameter of the third through hole and the fourth through hole is smaller than that of the fourth through hole. The apertures of the first through hole and the second through hole.
The speaker according to claim 7, wherein a plurality of the third through holes and a plurality of the fourth through holes are all arranged in an array, and the spacing between the third through holes in each column is the same The spacing between the fourth through holes in each column is the same, the spacing between the third through holes in each row is the same, and the spacing between the fourth through holes in each row is the same.
The speaker according to claim 8, wherein the cross section of the dome in the vibration direction is rectangular, and along the length direction of the dome, each column of the first through hole and each column of the first The three through holes are alternately arranged in turn, the second through holes in each column and the fourth through holes in each column are alternately arranged in turn, and along the width direction of the dome, the first through holes in each row are The third through holes are alternately arranged in turn, and the second through holes in each row and the fourth through holes in each row are alternately arranged in turn.
Type claim 10 here.