WO2019071402A1

WO2019071402A1 - Loudspeaker and mobile terminal

Info

Publication number: WO2019071402A1
Application number: PCT/CN2017/105427
Authority: WO
Inventors: 庞杰; 许逸君; 张玉磊
Original assignee: 深圳传音通讯有限公司
Priority date: 2017-10-09
Filing date: 2017-10-09
Publication date: 2019-04-18

Abstract

Disclosed in the present application are a loudspeaker and a mobile terminal; the loudspeaker comprises a housing and a loudspeaker unit that is accommodated within the housing, the loudspeaker unit dividing the space at the interior of the housing into a front sound cavity and a rear sound cavity; the loudspeaker further comprises a plurality of protruding ribs, the protruding ribs being formed on an inner wall of the housing; surfaces of the protruding ribs and an inner wall of the rear sound cavity are provided with a sound absorbing layer.

Description

Speaker and mobile terminal

Technical field

The present application relates to the field of acoustic-electrical conversion technology, and in particular to a speaker and a mobile terminal using the same.

Background technique

With the rapid development of electronic information technology, more and more electronic products are applied to speakers as their sounding components, such as mobile phones, notebook computers and the like. Today, people place higher demands on the acoustic performance of the speaker. The speaker of the related art structure mainly includes a housing and a sound emitting device housed in the housing. In order to improve the sound quality, it is common practice to apply a sound absorbing material in the housing, but the effect of improving the sound quality of the speaker is limited. Therefore, it is necessary to further improve the speaker to improve the acoustic performance of the speaker.

Application content

The main object of the present application is to provide a speaker that can improve the low frequency performance of the speaker through the ribs having a attracting layer.

In order to achieve the above object, a speaker provided by the present application includes a housing and a speaker unit housed in the housing, wherein the speaker unit separates an inner space of the housing into a front sound chamber and a rear sound chamber, and the speaker further includes a rib formed on an inner wall of the outer casing, and a sound absorbing layer is disposed on a surface of the rib and an inner wall of the rear acoustic cavity.

In an embodiment, the outer casing includes a first casing and a second casing that are engaged with each other, the speaker unit is connected to the first casing, and divides the inner space of the casing into a front The acoustic cavity and the rear acoustic cavity, a plurality of the ribs protruding from the first casing constitute an inner wall of the rear acoustic cavity.

In an embodiment, the plurality of the ribs are spaced apart, and an adjacent sound rib is formed between the two adjacent ribs.

In an embodiment, the two adjacent rib spacing distances are greater than or equal to millimeters.

In an embodiment, the ribs are disposed in an elongated shape, and a length extending direction of each of the ribs is the same as a length extending direction of the rear acoustic cavity, and/or the ribs are disposed in a cross shape. The plurality of the ribs are arranged in at least two columns, and the length of the ribs of each of the columns extends in the same direction as the length of the rear acoustic cavity.

In an embodiment, the inner wall of the first casing is provided with a shroud, the speaker unit is fastened to the inner side of the shroud, the inner wall of the shroud, the inner wall of the first casing, and the The speaker unit cooperates to form the front acoustic cavity.

In an embodiment, the shroud is located in a middle portion of the first casing, and the first casing is located on an inner wall of both ends of the shroud.

In an embodiment, the first housing is provided with an acoustic hole that communicates with the front acoustic cavity.

In an embodiment, the speaker further includes a dustproof net detachably coupled to the first housing and covering the sound hole.

The application also proposes a mobile terminal comprising a speaker as described above.

The technical solution of the present application furtherly increases the area of the sound absorbing layer in the volume of the limited back sound chamber 30 by using the sound absorbing layer on the surface of the rib, thereby improving the absorption rate of the sound energy absorbed by the speaker, so that the speaker reflects more Good low frequency performance, the overall low frequency is reduced, which significantly improves the sound quality of the speaker, simplifies the structure and reduces the cost.

DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the structures shown in the drawings without any creative work for those skilled in the art.

Figure 1 is an exploded view of the speaker of the present application;

2 is a schematic structural view of a speaker of the present application;

Figure 3 is a plan view of the speaker of the present application;

Figure 4 is a cross-sectional view taken along line A-A of the speaker of Figure 3;

Figure 5 is an enlarged view of the portion V in Figure 4;

Figure 6 is a cross-sectional view taken along line B-B of the speaker of Figure 3.

Description of the reference numerals:

标号Label	名称 Name	标号 Label	名称 Name
100 100	扬声器speaker	113 113	围板 Coaming
10 10	扬声器单体Speaker unit	12 12	第二壳体 Second housing
1111	第一壳体 First housing	13 13	凸筋 Rib
111 111	声孔 Sound hole	2020	前声腔 Front cavity
112 112	防尘网Air filter	30 30	后声腔 Rear cavity

The implementation, functional features and advantages of the present application will be further described with reference to the accompanying drawings.

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

It should be noted that all directional indications (such as up, down, left, right, front, back, ...) in the embodiments of the present application are only used to explain the components between a certain posture (as shown in the drawing). Relative positional relationship, motion situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In the present application, the terms "connected", "fixed" and the like should be understood broadly, unless otherwise explicitly stated and defined. For example, "fixed" may be a fixed connection, or may be a detachable connection, or may be integrated; It may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present application can be understood on a case-by-case basis.

In addition, the descriptions of "first", "second", and the like in this application are used for descriptive purposes only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. Nor is it within the scope of protection required by this application.

The inner side referred to in the present specification refers to one side located inside the inner cavity of the speaker 100, and the outer side refers to one side outside the inner cavity of the outer casing of the speaker 100.

The present application proposes a speaker 100.

In an embodiment of the present application, referring to FIG. 1 and FIG. 2, the speaker 100 includes a housing and a speaker unit 10 housed in the housing, and the speaker unit 10 divides the internal space of the housing into a front cavity. 20 and the rear sound chamber 30, the speaker 100 further includes a plurality of ribs 13 formed on the inner wall of the rear sound chamber, and the sound absorbing layer is disposed on the surface of the rib 13 and the inner wall of the rear sound chamber 30.

The speaker 100 is an important acoustic component of a portable electronic device for performing conversion between an electrical signal and a sound signal, and is an energy conversion device. As the cavity volume of the speaker 100 becomes smaller and smaller, in order to enable the speaker 100 to perform well, reduce F0 (resonance frequency), improve sound quality, and apply sound absorbing material to the inner wall of the cavity, the sound absorbing material absorbs part of the sound. The acoustic energy is equivalent to the volume of the enlarged acoustic cavity 30, thereby achieving the effect of lowering F0 (resonant frequency). In an embodiment of the present application, the sound absorbing layer comprises a sound absorbing material, that is, the sound absorbing material is applied to the rib 13 to form a sound absorbing layer, and the sound absorbing material can also be applied to the inner wall of the casing to fully utilize the space of the cavity to improve the low frequency. effect.

The technical solution of the present application further increases the area of the sound absorbing layer in the volume of the limited back sound chamber 30 by using the sound absorbing layer on the surface of the rib 13 , thereby improving the absorption rate of the sound energy absorbed by the speaker 100, so that the speaker 100 is reflected. Better low frequency performance, the overall low frequency frequency is reduced, thereby significantly improving the sound quality of the speaker 100, simplifying the structure and reducing the cost.

Further, referring to FIG. 5 and FIG. 6, the outer casing includes a first housing 11 and a second housing 12 that are engaged with each other, and the speaker unit 10 is connected to the first housing 11 and separates the internal space of the housing. In the front acoustic cavity 20 and the rear acoustic cavity 30, a plurality of ribs 13 are protruded from the first casing 11 to constitute an inner wall of the rear acoustic cavity 30.

In the embodiment of the present application, the first housing 11 and the second housing 12 are fastened to form a sound chamber, and the speaker unit 10 is accommodated in the sound chamber and divides the sound chamber into the front sound chamber 20 and the rear sound chamber 30, and a plurality of convex portions. The rib 13 is convexly disposed on the inner wall of the rear acoustic chamber 30, and increases the surface area of the inner wall of the first casing 11, thereby increasing the area of the sound absorbing layer of the rear acoustic chamber 30. Of course, according to the need of the silencing effect, the second casing 12 may also have a plurality of ribs 13 to increase the sound absorbing effect.

In addition, a plurality of grooves may be opened through the inner wall of the first casing 11 in the rear sound chamber 30, and/or a plurality of grooves may be formed in the inner wall of the second casing 12, and the inside of the limited rear sound chamber 30 is increased. The area of the sound absorbing layer of the rear acoustic cavity 30 is designed according to the specific design requirements, and the spacing and arrangement between the grooves are designed according to the direction of the air flow.

Specifically, referring to FIG. 1 , a plurality of ribs 13 are spaced apart, and a sound passage is formed between two adjacent ribs 13 .

In the embodiment of the present application, the rib 13 may be integrally molded with the housing, or may be separately provided, such as a splicing of the rib 13 to the housing or other connection manner by a colloid, and an over-tone channel formed between the ribs 13 Conducive to the flow of air, which in turn facilitates the absorption of sound waves into the rear acoustic cavity 30.

Further, the adjacent two ribs 13 are separated by a distance greater than or equal to 1 mm.

In the embodiment of the present application, if the two ribs 13 are separated by less than 1 mm, the formed over-tone channel is not conducive to the flow of air, thereby hindering the propagation of sound waves in the acoustic cavity, thereby reducing the sound wave of the sound absorbing layer to the rear acoustic cavity 30. Absorption rate.

Further, referring again to FIG. 1 , the ribs 13 are arranged in an elongated shape, and the length of each of the ribs 13 extends in the same direction as the length of the rear acoustic cavity 30, and/or the ribs 13 are arranged in a cross shape. The plurality of ribs 13 are arranged in at least two rows, and the length of the ribs 13 of each row extends in the same direction as the length of the rear acoustic cavity 30.

In the embodiment of the present application, the opposite sides of the long rib 13 are provided with a sound absorbing layer. Of course, the surface of the long rib 13 may also be provided with a sound absorbing layer to increase the area of the sound absorbing layer.

The first housing 11 and the second housing 12 are disposed in a long strip, and the length of each of the ribs 13 extends in the same direction as the length of the rear sound chamber 30, and the plurality of ribs 13 are formed with the rear sound chamber 30. The overtone channel with the same length extending direction facilitates the propagation of the acoustic wave in the rear acoustic cavity 30 in the overtone channel, thereby facilitating the absorption of the acoustic wave in the rear acoustic cavity 30 by the sound absorbing layer, thereby improving the sound quality effect; the length of each adjacent two An over-tone channel formed by the ribs 13 extending in the same direction is formed such that the propagation path is narrowed, and the spacing between the ribs 13 is such that the propagation path is narrowed and widened, and the propagation path is narrowed or narrowed, and spreads in the sound wave. During the process, due to the sudden expansion or contraction of the overtone channel, the sound waves of certain frequencies are reflected and interfered at the interface where the acoustic impedance is abrupt, so that the effect of silencing is achieved in the rear acoustic cavity 30. The number of the ribs 13 can be set according to the size of the rear acoustic cavity 30, and the length of the wide and narrow propagation path is extended by the narrowing and widening.

The rib 13 is arranged in a cross shape, and the surface of the cross rib 13 is provided with a sound absorbing layer, and the area of the sound absorbing layer is increased in the limited back sound chamber 30, thereby improving the absorption rate of the sound wave. Between adjacent two rows of cross ribs 13, the width direction of the cross ribs 13 further shrinks the overtone channel, further changing the direction of sound wave propagation, and increasing the phenomenon that sound waves of certain frequencies are reflected and interfered at the interface where the acoustic impedance is abrupt. The effect of the sound absorbing sound in the rear sound chamber 30 is improved.

Of course, the cross rib 13 and the long rib 13 can also form a row of spaced cross ribs 13 and 13 ribs 13 to ensure air flow in the rear sound chamber 30, thereby increasing the absorption rate of sound waves in the rear sound chamber 30. . The plurality of cross ribs 13 may be different in size, and are not limited thereto.

In addition, the shape of the rib 13 is designed to ensure the flow of air in the rear sound chamber 30, thereby increasing the area of the sound absorbing layer and ensuring the absorption effect. The rib 13 may have other shapes such as a cylindrical shape.

Further, referring to FIG. 1 and FIG. 4 again, the inner wall of the first housing 11 is provided with a surrounding plate 113, and the speaker unit 10 is fastened to the inner side of the surrounding plate 113, and the surrounding plate 113 The inner wall, the inner wall of the first housing 11, and the speaker 100 are unitarily formed to form the front acoustic cavity 20.

In the embodiment of the present application, the second casing 12 is covered with the first casing 11, and the enclosure 113 is closely attached to the speaker unit 10 to ensure the sealing of the rear acoustic cavity 30. The second casing 12 and the first casing The body 111 is further locked by a locking member to ensure the tightness in the outer casing.

Further, referring to FIG. 3 and FIG. 4, the surrounding plate 113 is located at the middle of the first casing 11, and the inner wall of the first casing 11 at both ends of the surrounding plate 113 is convexly provided with the ribs 13.

Further, referring to FIG. 3 and FIG. 6 together, the first housing 11 is provided with an acoustic hole 111 that communicates with the front acoustic cavity 20.

Further, referring again to FIG. 1 and FIG. 2, the speaker 100 further includes a dustproof net 112 detachably connected to the first casing 11 and covering the sound hole 111.

In the embodiment of the present application, the sound waves emitted from the speaker unit 10 pass through the front acoustic cavity 20 and pass through the sound hole 111. The sound hole 111 is covered with an air filter 112 for dustproof and foreign matter. The inner wall of the outer casing is also provided with a sound absorbing layer. The sound waves in the rear acoustic cavity 30 are absorbed by the inner wall and the sound absorbing layer on the surface of the rib 13 to enhance the sound absorbing effect.

The present application further provides a mobile terminal including a front casing, a rear cover and a speaker 100. The speaker 100 is mounted on the front casing, the front casing is fastened with the rear cover, and the rear cover is open to communicate with the sound hole 111. With reference to FIG. 1 and FIG. 2, the speaker 100 includes a housing and a speaker unit 10 housed in the housing. The speaker 100 further includes: a plurality of ribs 13 formed on the inner wall of the housing The surface of the rib 13 is provided with a sound absorbing layer.

In the embodiment of the present application, the speaker 100 is applied to a mobile terminal, and the mobile terminal includes an electronic product such as a computer or a mobile phone. Referring to FIG. 1 and FIG. 3 together, the speaker 100 is an important acoustic component of a portable electronic device for performing conversion between an electrical signal and a sound signal, and is an energy conversion device. As the cavity volume of the speaker 100 becomes smaller and smaller, in order to enable the speaker 100 to perform well, reduce F0 (resonance frequency), improve sound quality, and apply sound absorbing material to the inner wall of the cavity, the sound absorbing material absorbs part of the sound. The acoustic energy is equivalent to the volume of the enlarged acoustic cavity 30, thereby achieving the effect of lowering F0 (resonant frequency). In an embodiment of the present application, the sound absorbing layer comprises a sound absorbing material, that is, the sound absorbing material is applied to the rib 13 to form a sound absorbing layer, and the sound absorbing material can also be applied to the inner wall of the casing to fully utilize the space of the cavity to improve the low frequency. effect.

The technical solution of the present application is coated with a sound absorbing layer by using the rib 13 , which is equivalent to the volume of the enlarged sound cavity 30 , thereby improving the absorption rate of the sound energy absorbed by the speaker 100 , so that the speaker 100 exhibits better low frequency performance. The overall low frequency is reduced, thereby significantly improving the sound quality of the speaker 100, simplifying the structure, and reducing the cost.

In the embodiment of the present application, the first housing 11 and the second housing 12 are fastened to form a sound chamber, and the speaker unit 10 is accommodated in the sound chamber and divides the sound chamber into the front sound chamber 20 and the rear sound chamber 30, and a plurality of convex portions. The rib 13 is convexly disposed on the inner wall of the rear acoustic chamber 30, and increases the surface area of the inner wall of the first casing 11, thereby increasing the area of the sound absorbing layer of the rear acoustic chamber 30. Of course, according to the need of the silencing effect, the second casing 12 may also have a plurality of ribs 13 to increase the sound absorbing effect. Of course, it can be understood that the first housing 11 and the second housing 12 can also be the housing of the mobile terminal, and are designed as needed.

In the embodiment of the present application, the sound waves emitted from the speaker unit 10 pass through the front acoustic cavity 20 and pass through the sound hole 111. The sound hole 111 is covered with an air filter 112 for dustproof and foreign matter.

The inner wall of the outer casing is also provided with a sound absorbing layer. The sound waves in the rear acoustic cavity 30 are absorbed by the inner wall and the sound absorbing layer on the surface of the rib 13 to enhance the sound absorbing effect.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the patents of the present application, and the equivalent structural transformation, or direct/indirect use, of the present application and the contents of the drawings is used in the present invention. All other related technical fields are included in the patent protection scope of the present application.

Claims

A speaker includes a housing and a speaker unit housed in the housing, wherein the speaker unit divides an inner space of the housing into a front acoustic cavity and a rear acoustic cavity, and the speaker further includes a plurality of ribs. The rib is formed on an inner wall of the rear acoustic cavity, and a sound absorbing layer is disposed on a surface of the rib and an inner wall of the rear acoustic cavity.
The speaker according to claim 1, wherein said outer casing includes first and second casings that are engaged with each other, said speaker unit being coupled to said first casing and said inside of said casing The space is divided into a front acoustic cavity and a rear acoustic cavity, and the plurality of the convex ribs are protruded from the first casing to constitute an inner wall of the rear acoustic cavity.
The speaker according to claim 2, wherein said plurality of said ribs are spaced apart, and an adjacent sound rib is formed between said adjacent ribs.
The speaker according to claim 3, wherein two adjacent said ribs are separated by a distance greater than or equal to 1 mm.
The speaker according to claim 4, wherein the ribs are disposed in an elongated shape, and a length extending direction of each of the ribs is the same as a length extension direction of the rear acoustic cavity, and/or the rib The plurality of the ribs are arranged in at least two columns, and the length of the ribs of each column extends in the same direction as the length of the rear acoustic cavity.
The speaker according to claim 2, wherein an inner wall of the first casing is provided with a shroud, the speaker unit is fastened to an inner side of the shroud, an inner wall of the shroud, the first shell The inner wall of the body and the speaker unit cooperate to form the front acoustic cavity.
The speaker according to claim 6, wherein the enclosure is located in a middle portion of the first casing, and the first casing is located on an inner wall of both ends of the enclosure and the convex rib is convexly disposed.
The speaker according to claim 6, wherein said first casing is provided with a sound hole that communicates with the front sound chamber.
A speaker according to claim 8, wherein said speaker further comprises a dustproof net detachably coupled to said first casing and covering said sound hole.
A mobile terminal, wherein the mobile terminal comprises the speaker according to any one of claims 1 to 9.