WO2021114309A1 - 扬声器模组和终端设备 - Google Patents
扬声器模组和终端设备 Download PDFInfo
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- WO2021114309A1 WO2021114309A1 PCT/CN2019/125421 CN2019125421W WO2021114309A1 WO 2021114309 A1 WO2021114309 A1 WO 2021114309A1 CN 2019125421 W CN2019125421 W CN 2019125421W WO 2021114309 A1 WO2021114309 A1 WO 2021114309A1
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- WIPO (PCT)
- Prior art keywords
- fixed
- acoustic cavity
- housing
- passive radiator
- rear acoustic
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
Definitions
- the invention relates to the field of sound and electricity, and in particular to a speaker module and terminal equipment used in portable electronic products.
- the speaker module of the related art includes a speaker unit, a basin frame accommodating the speaker unit, and a passive radiator fixed to the basin frame.
- the passive radiator includes a speaker unit fixed to the basin frame.
- the membrane and the dome attached to the sound membrane, wherein the dome is made of copper.
- the sound film is only one layer, and its rigidity is limited, which causes the weight of the copper sheet as the dome to be limited, so that the The design reference of the passive radiator has a small adjustment range, which affects the low-frequency sensitivity of the speaker module, resulting in poor bass performance of the speaker module.
- the purpose of the present invention is to provide a loudspeaker module and terminal equipment with high low-frequency sensitivity and excellent acoustic performance.
- the present invention provides a speaker module, which includes a housing with a housing space, a speaker unit accommodated in the housing space, and a passive radiator fixed to the housing.
- the housing includes a through hole penetrating therethrough and spaced apart from the speaker unit, and a first peripheral wall surrounding the through hole.
- the speaker unit, the housing, and the passive radiator share a common Surrounds a rear acoustic cavity, the passive radiator is fixed to the housing and covers the through hole, and the passive radiator includes a first peripheral wall that is attached and fixed to a side of the first peripheral wall away from the rear acoustic cavity.
- a membrane, the dome, the first sound membrane, the second sound membrane and the first peripheral wall jointly enclose an inner sound cavity, and the second sound membrane is provided with a plurality of pressure relief holes passing through it ,
- the inner acoustic cavity is communicated with the rear acoustic cavity through the pressure relief hole.
- the first sound film includes a first vibrating portion, a first folding ring portion extending from a peripheral edge of the first vibrating portion, and a first folding ring portion that is bent in the direction of the first peripheral wall
- a first fixing portion extending and fixed to the first peripheral wall
- the first vibrating portion is provided with a first opening penetrating therethrough
- the dome top is fixed to the first vibrating portion close to the rear One side of the sound cavity, and the dome covers the first opening
- the second sound film includes a second vibrating portion, a second folding ring portion extending from the periphery of the second vibrating portion, and The two-folded ring portion is bent and extended in the direction of the first peripheral wall and is fixed to the second fixing portion of the first peripheral wall, the second vibrating portion is provided with a second opening penetrating therethrough, the spherical top It is fitted and fixed on the side of the two vibrating parts away from the rear acoustic cavity, and the dome covers the second opening, and the pressure relief hole
- the first vibrating part and the second vibrating part overlap the orthographic projection of the rear acoustic cavity along the vibration direction of the passive radiator, and the first folding ring part and the second folding ring
- the portion overlaps the orthographic projection of the rear acoustic cavity along the vibration direction of the passive radiator, and the first fixing portion and the second fixing portion are directed toward the rear acoustic cavity along the vibration direction of the passive radiator.
- the orthographic projections coincide, and the orthographic projections of the first opening and the second opening to the rear acoustic cavity along the vibration direction of the passive radiator coincide.
- the first vibration part is recessed in a direction away from the second vibration part
- the second vibration part is recessed in a direction away from the first vibration part
- the dome top is made of copper.
- a plurality of the pressure relief holes are symmetrically distributed along the long axis of the passive radiator.
- the housing includes a top wall fixed to the passive radiator, the through hole penetrates the top wall;
- the top wall includes a first section spaced apart from the first peripheral wall, and
- the first section is a second section bent and extended in the direction of the rear acoustic cavity and a third section is bent and extended from the second section in a direction away from the first section, and the through hole is provided in the first section.
- the projection of the first folding ring portion along the vertical vibration direction is located within the projection of the second segment along the vertical vibration direction.
- the first section is parallel to the third section.
- the present invention also provides a terminal device.
- the terminal device includes a housing and the speaker module fixed to the housing.
- the speaker module and terminal device of the present invention are configured to have a three-layer structure with a first sound film, a dome and a second sound film through a passive radiator.
- the first sound film and the second sound film share the same
- the weight of the dome is supported, which can expand the adjustment range of the design parameters of the passive radiator, thereby improving the low-frequency sensitivity and making the bass performance excellent.
- the dome, the first sound membrane, the second sound membrane and the first peripheral wall of the pelvic frame jointly enclose the inner sound cavity
- the second sound membrane is provided with multiple pressure relief holes, so that the inner sound cavity can pass through the pressure relief holes Connected with the rear acoustic cavity, this structure balances the air pressure inside the inner acoustic cavity, especially the air pressure between the first sound film and the second sound film, and ensures unobstructed air flow during the vibration of the passive radiator, thereby improving low-frequency sensitivity and acoustic performance excellent.
- FIG. 1 is a schematic diagram of the three-dimensional structure of the speaker module of the present invention.
- FIG. 2 is a schematic diagram of the three-dimensional structure of the speaker module of the present invention from another angle;
- FIG. 3 is an exploded schematic diagram of a part of the three-dimensional structure of the speaker module of the present invention.
- Figure 4 is a sectional view taken along line A-A in Figure 1;
- Figure 5 is an enlarged view along part B in Figure 4;
- Fig. 6 is a schematic diagram of the three-dimensional structure of the terminal device of the present invention.
- the present invention provides a speaker module 100, which includes a housing 1 with a housing space 10, a speaker unit 2 received in the housing space 10, and a speaker unit 2 fixed to the housing 1 passive radiator 3.
- the housing 1 includes a top wall 11 fixed to the passive radiator 3, a through hole 101 penetrating through the top wall 11 and spaced apart from the speaker unit 2, and the through hole 101 is enclosed The first perimeter wall 12.
- the speaker unit 2 is used to energize and produce sound.
- the speaker unit 2 includes a diaphragm 21.
- the diaphragm 21 is used for vibration and sound.
- the speaker unit 2 serves as a bass sound device.
- the speaker unit 2, the housing 1 and the passive radiator 3 jointly enclose a rear acoustic cavity 20.
- the rear acoustic cavity 20 is used to improve low-frequency acoustic performance.
- the rear acoustic cavity 20 is a sealed cavity, which facilitates the transmission of air through the rear acoustic cavity 20 when the speaker unit 2 vibrates and produces sound, so that the passive radiator 3 also vibrates with the speaker unit 2 to produce sound , So that the bass effect of the speaker module 100 is good.
- the speaker unit 2 is fixed for installation.
- the top wall 11 is provided with a fixing hole 102 penetrating the top wall 11 and spaced apart from the through hole 101.
- the fixing hole 102 is used to install the speaker unit 2.
- the speaker unit 2 is fixed to the top wall 11 and covers the fixing hole 102.
- the diaphragm 21 is disposed on a side of the top wall 11 away from the rear acoustic cavity 20, and the diaphragm 21 is disposed directly opposite to the fixing hole 102.
- the speaker unit 2 can also be arranged at other positions of the housing 1, and it does not have to be arranged on the top wall 11.
- the speaker unit 2 is completely disposed in the accommodating space, or the speaker unit 2 is disposed on the housing 1 connected to or directly opposite to the top wall 11.
- the passive radiator 3 is fixed to the housing 1 and covers the through hole 101.
- the through hole 101 is used to install the passive radiator 3.
- the passive radiator 3 is fixed to the first peripheral wall 12 and covers the through hole 101.
- the top wall 11 further includes a first section 111 spaced apart from the first peripheral wall 12, a second section 112 bent and extended from the first section 111 in the direction of the rear acoustic cavity 20, and The third section 113 is bent and extended from the second section 112 in a direction away from the first section 111.
- the through hole 101 is disposed in the third section 113.
- the fixing hole 102 is provided in the first section 111.
- the relative heights of the speaker unit 2 and the passive radiator 3 are equivalent. More preferably, the height of the first folded ring portion 312 along the vibration direction of the passive radiator 3 and the third section 113 is smaller than the height of the first section 111 and the third section 113; that is, The projection of the first ring portion 312 along the vertical vibration direction is located within the projection of the second section 112 along the vertical vibration direction.
- This structure makes the sounding planes of the speaker unit 2 and the passive radiator 3 basically the same, which is conducive to the same sounding of the two, so that the acoustic performance of the speaker module 100 is excellent. In addition, this structure is also conducive to production and assembly.
- the first section 111 is parallel to the third section 113.
- This structure makes the vibration direction of the speaker unit 2 and the passive radiator 3 consistent when sounding, so that the air vibration in the rear acoustic cavity 20 is consistent, so that the acoustic performance of the speaker module 100 is excellent.
- the passive radiator 3 includes a first sound film 31, a dome 32 and a second sound film 33.
- the first sound membrane 31 is attached and fixed to the side of the first peripheral wall 12 away from the rear sound cavity 20.
- the first sound film 31 includes a first vibrating part 311, a first folding ring part 312 extending from the periphery of the first vibrating part 311, and a first folding ring part 312 extending from the first folding ring part 312 to the first
- the peripheral wall 12 is bent and extended in the direction and fixed to the first fixing portion 313 of the first peripheral wall 12.
- the first vibrating part 311 is used for vibrating and sounding.
- the dome 32 is fixed on the side of the first sound membrane 31 close to the rear sound cavity 20.
- the second sound membrane 33 is fixed on the side of the first peripheral wall 12 close to the rear sound cavity 20.
- the second sound film 33 is fixed to the dome 32 at the same time.
- the second sound film 33 includes a second vibrating portion 331, a second folding ring portion 332 extending from the periphery of the second vibrating portion 331, and a second folding ring portion 332 toward the first
- the peripheral wall 12 is bent and extended in the direction and fixed to the second fixing portion 333 of the first peripheral wall 12.
- the second vibrating part 331 is used for vibrating and sounding.
- the dome 32 is fixed to the first sound membrane 31 and the second sound membrane 33 at the same time.
- the dome 32 is disposed between the first sound film 31 and the second sound film 33.
- the first vibrating portion 311 has a first opening 3110 penetrating therethrough.
- the dome 32 is attached and fixed to a side of the first vibrating portion 311 close to the rear acoustic cavity 20, and the dome 32 covers the first opening 3110.
- the second vibrating portion 331 is provided with a second opening 3310 penetrating therethrough, the dome 32 is attached and fixed to the side of the second vibrating portion 331 away from the rear acoustic cavity 20, and the dome 32 Covers the second opening 3310.
- the dome 32 is used to improve the rigidity of the first sound membrane 31 and the second sound membrane 33.
- the dome 32 and the through hole 101 are arranged directly opposite to each other. This structure enables the vibration of the first vibrating portion 311 and the second vibrating portion 331 to utilize the space above and below the through hole 101, which is beneficial to sound generation.
- the dome 32, the first sound membrane 31, the second sound membrane 33 and the first peripheral wall 12 jointly enclose an inner sound cavity 30.
- the first folding ring portion 312 and the second folding ring portion 332 are spaced apart.
- the first folding ring portion 312 and the second folding ring portion 332 respectively extend in opposite directions to form the inner acoustic cavity 30.
- the first folding ring portion 312 extends from the first vibrating portion 311 and the first fixing portion 313 to the side away from the rear acoustic cavity 20, on the contrary
- the second folding ring portion 332 extends from the second vibrating part 331 and the second fixing part 333 to a side close to the rear acoustic cavity 20 respectively. That is, the first vibrating part 311 is recessed in a direction away from the second vibrating part 331, and the second vibrating part 331 is recessed in a direction away from the first vibrating part 311.
- the dome 32 is made of copper. Since the dome 32 is heavier, the weight of the dome 32 is supported by the first sound film 31 and the second sound film 33 together. It is also because the dome 32 is heavier, which can effectively increase the weight of the dome 32. The rigidity of the first sound membrane 31 and the second sound membrane 33 makes the passive radiator 3 good in acoustic performance.
- the second sound membrane 33 is provided with a plurality of pressure relief holes 330 penetrating therethrough.
- the pressure relief hole 330 is provided in the second folding ring portion 332.
- the inner acoustic cavity 30 communicates with the rear acoustic cavity 20 through the pressure relief hole 330. This structure balances the air pressure inside the inner acoustic cavity, especially the air pressure between the first sound film 31 and the second sound film 33, and ensures that the passive radiator 3 vibrates smoothly, thereby improving low frequency sensitivity High and excellent acoustic performance.
- the plurality of pressure relief holes 330 are symmetrically distributed along the long axis of the passive radiator 3.
- the first vibrating part 311 and the second vibrating part 331 overlap the orthographic projection of the rear acoustic cavity 20 along the vibration direction of the passive radiator 3.
- the first folding ring portion 312 and the second folding ring portion 332 overlap the orthographic projections of the passive radiator 3 toward the rear acoustic cavity 20 along the vibration direction of the passive radiator 3.
- the first fixing portion 313 and the second fixing portion 333 overlap the orthographic projection of the passive radiator 3 to the rear acoustic cavity 20 along the vibration direction of the passive radiator 3.
- the first opening 3110 and the second opening 3310 coincide with the orthographic projection of the passive radiator 3 to the rear acoustic cavity 20 along the vibration direction of the passive radiator 3.
- the first sound film 31 and the second sound film 33 are arranged on opposite sides of the dome 32 and mirrored.
- This structure is beneficial for the first sound film 31 and the second sound film 33 to jointly support the weight of the dome 32, thereby expanding the adjustment range of the design parameters of the passive radiator 3, thereby increasing the The low frequency sensitivity of the speaker module 100 makes the bass performance excellent.
- the orthographic projections of the first vibrating portion 311 and the second vibrating portion 331 to the top wall 11 along the vibration direction of the passive radiator 3 all fall within the through hole 101 .
- This structure is beneficial for the passive radiator 3 to make full use of the space above and below the through hole 101, so that the passive radiator 3 has a wider vibration range, and is beneficial for improving the acoustic performance of the speaker module 100.
- the present invention also provides a terminal device 200.
- the terminal device 200 includes a housing 4 and the speaker module 100 fixed to the housing 4.
- the terminal device 200 uses the speaker module 100 to make it have high low frequency sensitivity and excellent acoustic performance.
- the speaker module and terminal device of the present invention are configured to have a three-layer structure with a first sound film, a dome and a second sound film through a passive radiator.
- the first sound film and the second sound film share the same
- the weight of the dome is supported, which can expand the adjustment range of the design parameters of the passive radiator, thereby improving the low-frequency sensitivity and making the bass performance excellent.
- the dome, the first sound membrane, the second sound membrane and the first peripheral wall of the pelvic frame jointly enclose the inner sound cavity
- the second sound membrane is provided with multiple pressure relief holes, so that the inner sound cavity can pass through the pressure relief holes Connected with the rear acoustic cavity, this structure balances the air pressure inside the inner acoustic cavity, especially the air pressure between the first sound film and the second sound film, and ensures unobstructed air flow during the vibration of the passive radiator, thereby improving low-frequency sensitivity and acoustic performance excellent.
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Abstract
本发明提供了扬声器模组，其包括壳体、扬声器单体以及无源辐射体，壳体上设有贯穿其上且与扬声器单体间隔设置的通孔，无源辐射体固定于壳体并覆盖通孔，声器单体、壳体以及无源辐射体共同围成后声腔，壳体包括围设成通孔的第一周壁，无源辐射体包括贴合固定于第一周壁远离后声腔一侧的第一音膜、固定于第一音膜靠近后声腔一侧的球顶以及固定于所述第一周壁靠近后声腔一侧且同时固定于球顶的第二音膜，球顶、第一音膜、第二音膜及第一周壁共同围成内声腔，第二音膜设有贯穿其上的多个泄压孔，内声腔通过泄压孔与后声腔连通。与相关技术相比，本发明的扬声器模组和终端设备的低频灵敏度高且声学性能优。
Description
本发明涉及声电领域，尤其涉及一种运用于便携式电子产品的扬声器模组和终端设备。
随着移动互联网时代的到来，终端设备尤其是智能移动设备的数量不断上升。而在众多移动设备之中，手机无疑是最常见、最便携的移动终端设备。目前，手机的功能极其多样，其中之一便是高品质的音乐功能，因此，作为低音单元的扬声器模组被大量应用到现在的智能移动设备之中。
相关技术的所述扬声器模组包括扬声器单体、收容所述扬声器单体的盆架以及固定于所述盆架的无源辐射体，所述无源辐射体包括固定于所述盆架的音膜和贴设所述音膜上的球顶，其中，球顶为铜制成。
然而，相关技术的所述扬声器模组的所述无源辐射体中，所述音膜仅为一层，其刚度有限，从而造成作为所述球顶的铜片的重量受限，使得所述无源辐射体设计参考的调节范围小，因而影响到所述扬声器模组低频灵敏度，从而使所述扬声器模组的低音性能不佳。
因此，实有必要提供一种新的扬声器箱解决上述技术问题。
本发明的目的在于提供一种低频灵敏度高且声学性能优的扬声器模组和终端设备。
为了达到上述目的，本发明提供了一种扬声器模组，其包括具有收容空间的壳体、收容于所述收容空间内的扬声器单体以及固定于所述壳体的无源辐射体，所述壳体包括贯穿其上且与所述扬声器单体间隔设置的通孔和围设成所述通孔的第一周壁，所述扬声器单体、所述壳体以及所述无源辐射体共同围成后声腔，所述无源辐射体固定于所述壳体并覆盖所述通孔，所述无源辐射体包括贴合固定于所述第一周壁远离所述后声腔一侧的第一音膜、固定于所述第一音膜靠近所述后声腔一侧的球顶以及固定于所述第一周壁靠近所述后声腔一侧且同时固定于所述球顶的第二音膜，所述球顶、所述第一音膜、所述第二音膜及所述第一周壁共同围成内声腔，所述第二音膜设有贯穿其上的多个泄压孔，所述内声腔通过所述泄压孔与所述后声腔连通。
优选的，所述第一音膜包括第一振动部、由所述第一振动部的周缘延伸的第一折环部以及由所述第一折环部向所述第一周壁方向弯折延伸并固定于所述第一周壁的第一固定部，所述第一振动部设有贯穿其上的第一开口，所述球顶贴合固定于所述第一振动部靠近所述后声腔的一侧，且所述球顶覆盖所述第一开口；所述第二音膜包括第二振动部、由所述第二振动部的周缘延伸的第二折环部以及由所述第二折环部向所述第一周壁方向弯折延伸并固定于所述第一周壁的第二固定部，所述第二振动部设有贯穿其上的第二开口，所述球顶贴合固定于所述二振动部远离所述后声腔的一侧，且所述球顶覆盖所述第二开口，所述泄压孔设置于所述第二折环部；所述第一折环部与所述第二折环部间隔设置。
优选的，所述第一振动部与所述第二振动部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一折环部与所述第二折环部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一固定部与所述第二固定部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一开口与所述第二开口沿所述无源辐射体的振动方向向所述后声腔的正投影重合。
优选的，所述第一振动部向远离所述第二振动部的方向凹陷，所述第二振动部向远离所述第一振动部的方向凹陷。
优选的，所述球顶为铜制成。
优选的，多个所述泄压孔沿所述无源辐射体的长轴对称分布。
优选的，所述壳体包括与所述无源辐射体固定的顶壁，所述通孔贯穿所述顶壁；所述顶壁包括与所述第一周壁间隔设置的第一段、由所述第一段向所述后声腔方向弯折延伸的第二段以及由所述第二段向远离所述第一段方向弯折延伸的第三段，所述通孔设置于所述第三段。
优选的，所述第一折环部沿垂直振动方向的投影位于所述第二段沿垂直振动方向的投影内。
优选的，所述第一段平行于所述第三段。
本发明还提供了一种终端设备，所述终端设备包括外壳和固定于所述外壳的所述扬声器模组。
与相关技术相比，本发明的扬声器模组和终端设备通过无源辐射体设为具有第一音膜、球顶以及第二音膜的三层结构，第一音膜和第二音膜共同支撑球顶的重量，从而可以扩大无源辐射体设计参数的调节范围，从而提高了低频灵敏度，使低音性能优。另外，球顶、第一音膜、第二音膜及盆架的第一周壁共同围成内声腔，并在第二音膜设有多个泄压孔，从而使内声腔通过泄压孔与后声腔连通，该结构平衡内声腔内部的气压，尤其是第一音膜与第二音膜之间的气压，并保证无源辐射体振动过程中气流通畅，从而提高低频灵敏度高且声学性能优。
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图，其中：
图1为本发明扬声器模组的立体结构示意图；
图2为本发明扬声器模组另一角度的立体结构示意图；
图3为本发明扬声器模组的部分立体结构分解示意图；
图4为沿图1中A-A线剖视图；
图5为沿图4中B部分的放大图；
图6为本发明终端设备的立体结构示意图。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请同时参阅图1-5，本发明提供了一种扬声器模组100，其包括具有收容空间10的壳体1、收容于所述收容空间10内的扬声器单体2以及固定于所述壳体1的无源辐射体3。
所述壳体1包括与所述无源辐射体3固定的顶壁11、贯穿所述顶壁11上且与所述扬声器单体2间隔设置的通孔101以及围设成所述通孔101的第一周壁12。
所述扬声器单体2用于通电发声。所述扬声器单体2包括振膜21。所述振膜21用于振动发声。在本实施方式中，所述扬声器单体2作为低音发声器件。
所述扬声器单体2、所述壳体1以及所述无源辐射体3共同围成后声腔20。所述后声腔20用于改善低频声学性能。所述后声腔20为密封空腔，有利于所述扬声器单体2振动发声时通过所述后声腔20的空气传递，使得所述无源辐射体3也跟随所述扬声器单体2振动而发声，从而使所述扬声器模组100的低音效果好。
在本实施方式中，为了安装固定所述扬声器单体2。所述顶壁11设有贯穿其上且与所述通孔101间隔设置的固定孔102。所述固定孔102用于安装所述扬声器单体2。具体的，所述扬声器单体2固定于所述顶壁11且覆盖所述固定孔102。所述振膜21设置于所述顶壁11远离所述后声腔20一侧，且所述振膜21与所述固定孔102正对设置。当然，所述扬声器单体2也可以设置于所述壳体1的其他位置，不一定要设置于所述顶壁11。比如所述扬声器单体2完全设置于所述收容空间内，或者所述扬声器单体2设置于与所述顶壁11相连或正对的所述壳体1上也是可以的。
所述无源辐射体3固定于所述壳体1并覆盖所述通孔101。所述通孔101用于安装所述无源辐射体3。具体的，所述无源辐射体3固定于所述第一周壁12且覆盖所述通孔101。
为了合理布局所述扬声器单体2和所述无源辐射体3在所述顶壁11的位置，从而改善所述扬声器模组100的声学性能。具体的，所述顶壁11还包括的与所述第一周壁12间隔设置的第一段111、由所述第一段111向所述后声腔20方向弯折延伸的第二段112以及由所述第二段112向远离所述第一段111方向弯折延伸的第三段113。所述通孔101设置于所述第三段113。在本实施方式中，所述固定孔102设置于所述第一段111，该结构有利于所述扬声器单体2安装于所述第一段111，同时所述无源辐射体3安装于所述第三段113后，所述扬声器单体2和所述无源辐射体3的相对高度相当。更优的，所述第一折环部312沿所述无源辐射体3的振动方向与所述第三段113的高度小于所述第一段111与所述第三段113的高度；即所述第一折环部312沿垂直振动方向的投影位于所述第二段112沿垂直振动方向的投影内。该结构使得所述扬声器单体2和所述无源辐射体3的发声的平面基本相同，有利于两者发声一致，从而使所述扬声器模组100的声学性能优。另外，该结构还有利于生产组装。
在本实施方式中，所述第一段111平行于所述第三段113。该结构使得所述扬声器单体2和所述无源辐射体3的发声时振动方向一致，从而使得所述后声腔20内的空气振动一致，从而使所述扬声器模组100的声学性能优。
具体的，所述无源辐射体3包括第一音膜31、球顶32以及第二音膜33。
所述第一音膜31贴合固定于所述第一周壁12远离所述后声腔20一侧。具体的，所述第一音膜31包括第一振动部311、由所述第一振动部311的周缘延伸的第一折环部312以及由所述第一折环部312向所述第一周壁12方向弯折延伸并固定于所述第一周壁12的第一固定部313。所述第一振动部311用于振动发声。
所述球顶32固定于所述第一音膜31靠近所述后声腔20一侧。
所述第二音膜33固定于所述第一周壁12靠近所述后声腔20一侧。所述第二音膜33同时固定于所述球顶32。具体的，所述第二音膜33包括第二振动部331、由所述第二振动部331的周缘延伸的第二折环部332以及由所述第二折环部332向所述第一周壁12方向弯折延伸并固定于所述第一周壁12的第二固定部333。所述第二振动部331用于振动发声。
其中，所述球顶32同时固定于所述第一音膜31和所述第二音膜33。所述球顶32设置于所述第一音膜31和所述第二音膜33之间。在本实施方式中，所述第一振动部311设有贯穿其上的第一开口3110。所述球顶32贴合固定于所述第一振动部311靠近所述后声腔20的一侧，且所述球顶32覆盖所述第一开口3110。所述第二振动部331设有贯穿其上的第二开口3310，所述球顶32贴合固定于所述第二振动部331远离所述后声腔20的一侧，且所述球顶32覆盖所述第二开口3310。所述球顶32用于改善所述第一音膜31和所述第二音膜33的刚度。
所述球顶32与所述通孔101正对设置。该结构使得所述第一振动部311和所述第二振动部331的振动可以利用所述通孔101上下的空间，有利于发声。
所述球顶32、所述第一音膜31、所述第二音膜33及所述第一周壁12共同围成内声腔30。具体的，所述第一折环部312与所述第二折环部332间隔设置。在本实施方式中，所述第一折环部312与所述第二折环部332分别往相反方向延伸形成所述内声腔30。也就是说，所述第一折环部312分别由所述第一振动部311和所述第一固定部313往远离所述后声腔20的一侧延伸，相反，所述第二折环部332分别由所述第二振动部331和所述第二固定部333往靠近所述后声腔20的一侧延伸。也就是说，所述第一振动部311向远离所述第二振动部331的方向凹陷，所述第二振动部331向远离所述第一振动部311的方向凹陷。
在本实施方式中，所述球顶32为铜制成。由于所述球顶32较重，通过所述第一音膜31和所述第二音膜33共同支撑所述球顶32的重量，也同样是因为所述球顶32较重可以有效提高所述第一音膜31和所述第二音膜33的刚度，从而使所述无源辐射体3声学性能好。
所述第二音膜33设有贯穿其上的多个泄压孔330。所述泄压孔330设置于所述第二折环部332。所述内声腔30通过所述泄压孔330与所述后声腔20连通。该结构平衡内声腔内部的气压，尤其是所述第一音膜31和所述第二音膜33之间的气压，并保证所述无源辐射体3振动过程中气流通畅，从而提高低频灵敏度高且声学性能优。
更优的，为了更好平衡，所述内声腔30的气压。多个所述泄压孔330沿所述无源辐射体3的长轴对称分布。
在本实施方式中，所述第一振动部311与所述第二振动部331沿所述无源辐射体3的振动方向向所述后声腔20的正投影重合。所述第一折环部312与所述第二折环部332沿所述无源辐射体3的振动方向向所述后声腔20的正投影重合。所述第一固定部313与所述第二固定部333沿所述无源辐射体3的振动方向向所述后声腔20的正投影重合。所述第一开口3110与所述第二开口3310沿所述无源辐射体3的振动方向向所述后声腔20的正投影重合。也就是说，所述第一音膜31和所述第二音膜33设置为关于所述球顶32相对两侧且镜像设置。该结构有利于所述第一音膜31和所述第二音膜33共同支撑所述球顶32的重量，从而可以扩大所述无源辐射体3设计参数的调节范围，从而提高了所述扬声器模组100的低频灵敏度，使低音性能优。
在本实施方式中，所述第一振动部311与所述第二振动部331沿所述无源辐射体3的振动方向向所述顶壁11的正投影均落在所述通孔101内。该结构有利于所述无源辐射体3充分利用所述通孔101上下的空间，使所述无源辐射体3的振动范围更广，有利于提高所述扬声器模组100的声学性能。
请参阅图6，本发明还提供了一种终端设备200。所述终端设备200包括外壳4和固定于所述外壳4的所述扬声器模组100。所述终端设备200应用了所述扬声器模组100使得其低频灵敏度高且声学性能优。
与相关技术相比，本发明的扬声器模组和终端设备通过无源辐射体设为具有第一音膜、球顶以及第二音膜的三层结构，第一音膜和第二音膜共同支撑球顶的重量，从而可以扩大无源辐射体设计参数的调节范围，从而提高了低频灵敏度，使低音性能优。另外，球顶、第一音膜、第二音膜及盆架的第一周壁共同围成内声腔，并在第二音膜设有多个泄压孔，从而使内声腔通过泄压孔与后声腔连通，该结构平衡内声腔内部的气压，尤其是第一音膜与第二音膜之间的气压，并保证无源辐射体振动过程中气流通畅，从而提高低频灵敏度高且声学性能优。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。
Claims (10)
- 一种扬声器模组，其包括具有收容空间的壳体、收容于所述收容空间内的扬声器单体以及固定于所述壳体的无源辐射体，所述壳体上设有贯穿其上且与所述扬声器单体间隔设置的通孔，所述无源辐射体固定于所述壳体并覆盖所述通孔，所述扬声器单体、所述壳体以及所述无源辐射体共同围成后声腔，其特征在于，所述壳体包括围设成所述通孔的第一周壁，所述无源辐射体包括贴合固定于所述第一周壁远离所述后声腔一侧的第一音膜、固定于所述第一音膜靠近所述后声腔一侧的球顶以及固定于所述第一周壁靠近所述后声腔一侧且同时固定于所述球顶的第二音膜，所述球顶、所述第一音膜、所述第二音膜及所述第一周壁共同围成内声腔，所述第二音膜设有贯穿其上的多个泄压孔，所述内声腔通过所述泄压孔与所述后声腔连通。
- 根据权利要求1所述的扬声器模组，其特征在于，所述第一音膜包括第一振动部、由所述第一振动部的周缘延伸的第一折环部以及由所述第一折环部向所述第一周壁方向弯折延伸并固定于所述第一周壁的第一固定部，所述第一振动部设有贯穿其上的第一开口，所述球顶贴合固定于所述第一振动部靠近所述后声腔的一侧，且所述球顶覆盖所述第一开口；所述第二音膜包括第二振动部、由所述第二振动部的周缘延伸的第二折环部以及由所述第二折环部向所述第一周壁方向弯折延伸并固定于所述第一周壁的第二固定部，所述第二振动部设有贯穿其上的第二开口，所述球顶贴合固定于所述二振动部远离所述后声腔的一侧，且所述球顶覆盖所述第二开口，所述泄压孔设置于所述第二折环部；所述第一折环部与所述第二折环部间隔设置。
- 根据权利要求2所述的扬声器模组，其特征在于，所述第一振动部与所述第二振动部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一折环部与所述第二折环部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一固定部与所述第二固定部沿所述无源辐射体的振动方向向所述后声腔的正投影重合，所述第一开口与所述第二开口沿所述无源辐射体的振动方向向所述后声腔的正投影重合。
- 根据权利要求2所述的扬声器模组，其特征在于，所述第一振动部向远离所述第二振动部的方向凹陷，所述第二振动部向远离所述第一振动部的方向凹陷。
- 根据权利要求1所述的扬声器模组，其特征在于，所述球顶为铜制成。
- 根据权利要求1所述的扬声器模组，其特征在于，多个所述泄压孔沿所述无源辐射体的长轴对称分布。
- 根据权利要求1所述的扬声器模组，其特征在于，所述壳体包括与所述无源辐射体固定的顶壁，所述通孔贯穿所述顶壁；所述顶壁包括与所述第一周壁间隔设置的第一段、由所述第一段向所述后声腔方向弯折延伸的第二段以及由所述第二段向远离所述第一段方向弯折延伸的第三段，所述通孔设置于所述第三段。
- 根据权利要求7所述的扬声器模组，其特征在于，所述第一折环部沿垂直振动方向的投影位于所述第二段沿垂直振动方向的投影内。
- 根据权利要求7所述的扬声器模组，其特征在于，所述第一段平行于所述第三段。
- 一种终端设备，其包括外壳，其特征在于，所述终端设备还包括固定于所述外壳的如权利要求1-9中任意一项所述的扬声器模组。
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