TWM624217U

TWM624217U - Micro-speaker

Info

Publication number: TWM624217U
Application number: TW110214116U
Authority: TW
Inventors: 魏鵬江; 張圓媛
Original assignee: 大陸商美特科技（蘇州）有限公司
Priority date: 2021-10-09
Filing date: 2021-11-26
Publication date: 2022-03-01
Also published as: CN216291424U

Abstract

The utility model relates to the field of loudspeakers, in particular to a Micro-speaker. In addition to setting the front cavity, rear cavity, resonant cavity, channel, sound producing port and sound producing element in the shell, the Micro-speaker of this embodiment also sets a vibrating plate between the resonant cavity and the rear cavity. Through the vibration of the vibrating plate, the volume of the resonant cavity can be changed, so as to reduce the resonant frequency of the resonant cavity, The resonant cavity can better smooth the peak value of the frequency response curve at the intermediate frequency, reduce the intermediate frequency distortion of the loudspeaker and improve the quality of the intermediate frequency sound of the loudspeaker.

Description

微型揚聲器Micro speaker

本創作涉及揚聲器領域，尤其是一種微型揚聲器。This creation relates to the field of loudspeakers, especially a miniature loudspeaker.

隨著社會的發展和科技的進步，揚聲器作為一種發聲裝置在人們日常生活中的應用越來越廣泛，其中微型揚聲器在近年來發展迅速，在此過程中，如何設計出中頻平滑的微型揚聲器，已經成為了電聲工程師一個需要持續研究的熱點問題。微型揚聲器通常具有前腔和後腔，其中前腔用於中頻發聲，但中頻因前腔共振會產生一個較為尖銳刺耳的聲音，在頻響曲線上表現為在中頻附近出現一個尖銳的峰值，導致揚聲器在中頻發聲失真。目前解決這一問題的方法是增加一個與前腔連通的共振腔，以平滑中頻處的頻響曲線，但是受系統空間限制，該聲學共振腔體積很小，導致其共振頻率很高，往往達不到理想的平滑中頻處頻響曲線的效果。With the development of society and the advancement of science and technology, loudspeakers are more and more widely used in people's daily life as a sounding device. Among them, micro-speakers have developed rapidly in recent years. In this process, how to design a micro-speaker with smooth mid-frequency , has become a hot issue for electroacoustic engineers that needs continuous research. Micro speakers usually have a front cavity and a rear cavity, where the front cavity is used for mid-frequency sound, but the mid-frequency will produce a sharper and harsher sound due to the resonance of the front cavity. peaks, causing speakers to distort at mid-range frequencies. The current solution to this problem is to add a resonant cavity that communicates with the front cavity to smooth the frequency response curve at the intermediate frequency. However, due to the limitation of the system space, the volume of the acoustic resonant cavity is very small, resulting in a high resonant frequency. The effect of the ideal smooth frequency response curve at the intermediate frequency cannot be achieved.

有鑑於此，本創作的目的是提供一種能夠平滑中頻處頻響曲線，減少中頻聲音失真的微型揚聲器。In view of this, the purpose of this creation is to provide a miniature speaker that can smooth the frequency response curve at the intermediate frequency and reduce the distortion of the intermediate frequency sound.

本創作實施例提供了一種微型揚聲器，前述揚聲器包含：外殼，具有內部空間，前述內部空間包含前腔、後腔和共振腔；發聲元件，設定在前述內部空間中，分隔前述前腔和前述後腔；發聲口，設定在前述外殼上，連通前述前腔與前述外殼外部；通道，設定在前述外殼內部，兩端分別連通前述前腔和前述共振腔；以及振動板，分隔前述後腔和前述共振腔，用於調節共振腔的共振頻率。The present creative embodiment provides a micro-speaker, the speaker includes: a shell having an inner space, the inner space includes a front cavity, a rear cavity and a resonant cavity; a sound-emitting element is set in the inner space and separates the front cavity and the rear cavity A cavity; a sounding port, set on the aforementioned casing, communicating with the aforementioned front cavity and the outside of the aforementioned shell; a channel, set inside the aforementioned shell, with two ends respectively communicating with the aforementioned front cavity and the aforementioned resonant cavity; and a vibrating plate, separating the aforementioned rear cavity from the aforementioned The resonant cavity is used to adjust the resonance frequency of the resonant cavity.

進一步地，前述振動板包含：高分子振膜，呈環形設定在前述內部空間中，且環形外側邊緣與前述外殼固定連接；和中貼板，設定在前述內部空間中，與前述高分子振膜的環形內側邊緣固定連接。Further, the aforementioned vibrating plate comprises: a polymer vibrating membrane, which is set in the aforementioned inner space in a ring shape, and the outer edge of the annular shape is fixedly connected with the aforementioned housing; The annular inner edge is fixedly connected.

進一步地，前述高分子振膜與前述外殼和前述中貼板之間透過膠水進行固定。Further, the polymer diaphragm, the shell and the middle veneer are fixed through glue.

進一步地，前述中貼板採用鋁或銅材質。Further, the aforementioned middle veneer is made of aluminum or copper.

進一步地，前述後腔的容積大於前述前腔，前述前腔的容積大於前述共振腔。Further, the volume of the rear cavity is larger than that of the front cavity, and the volume of the front cavity is larger than that of the resonance cavity.

進一步地，前述發聲元件包含：振膜，設定在前述內部空間中，將前述內部空間分隔為前腔和後腔；音圈，與前述振膜固定連接，用於帶動前述振膜振動；和磁體，與前述音圈相鄰的固定在前述內部空間中，用於提供前述音圈運動所需磁場。Further, the aforementioned sound-generating element includes: a vibrating membrane, set in the aforementioned inner space, and dividing the aforementioned inner space into a front cavity and a rear cavity; a voice coil, fixedly connected with the aforementioned vibration membrane, for driving the aforementioned vibration membrane to vibrate; and a magnet , which is fixed in the inner space adjacent to the voice coil and used to provide the magnetic field required for the movement of the voice coil.

進一步地，前述音圈與揚聲器驅動電路連接，用於承載驅動電流的流通。Further, the aforementioned voice coil is connected to the speaker driving circuit for carrying the circulation of the driving current.

進一步地，前述外殼包含：上殼體；和下殼體，與前述上殼體可拆卸連接，共同圍成前述內部空間。Further, the aforementioned casing comprises: an upper shell; and a lower shell, which is detachably connected to the aforementioned upper shell, and together encloses the aforementioned inner space.

進一步地，前述外殼還包含：連接件，設定在前述內部空間中，且分別與前述上殼體和前述下殼體可拆卸連接，前述發聲元件和前述振動板分別固定在前述連接件上。Further, the aforementioned housing further includes: connecting pieces set in the aforementioned inner space and detachably connected with the aforementioned upper casing and the aforementioned lower casing, respectively, and the aforementioned sounding element and the aforementioned vibration plate are respectively fixed on the aforementioned connecting pieces.

本創作實施例的微型揚聲器除在外殼內設定前腔、後腔、共振腔、通道、發聲口和發聲元件之外，還在共振腔與後腔之間設定了振動板，透過振動板的振動，可以使共振腔的容積發生改變，從而降低共振腔的共振頻率，使共振腔能夠更好的起到平滑中頻處頻響曲線峰值的效果，減少了揚聲器的中頻失真，提高了揚聲器中頻發聲的品質。In addition to the front cavity, the rear cavity, the resonant cavity, the channel, the sound-emitting port and the sound-emitting element, the micro-speaker of this creative embodiment also sets a vibrating plate between the resonant cavity and the back cavity, so that the vibration of the vibrating plate can pass through the micro-speaker. , the volume of the resonant cavity can be changed, thereby reducing the resonant frequency of the resonant cavity, so that the resonant cavity can better smooth the peak of the frequency response curve at the intermediate frequency, reduce the intermediate frequency distortion of the speaker, and improve the sound quality of the speaker. sound quality.

以下基於實施例對本創作進行描述，但是本創作並不僅僅限於這些實施例。在下文對本創作的細節描述中，詳盡描述了一些特定的細節部分。對所屬技術領域中具有通常知識者來說沒有這些細節部分的描述也可以完全理解本創作。為了避免混淆本創作的實質，習知的方法、過程、流程、元件和電路並沒有詳細敘述。The present invention is described below based on the embodiments, but the present invention is not limited only to these embodiments. In the following detailed description of the creation, some specific details are described in detail. The present invention can be fully understood by those of ordinary skill in the art without the description of these detailed parts. In order to avoid obscuring the essence of the present invention, well-known methods, procedures, processes, components and circuits have not been described in detail.

此外，所屬技術領域中具有通常知識者應當理解，在此提供的圖式都是為了說明的目的，並且圖式不一定是按比例繪製的。Furthermore, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

同時，應當理解，在以下的描述中，「電路」是指由至少一個元件或子電路透過電氣連接或電磁連接構成的導電迴路。當稱元件或電路「連接到」另一元件或稱元件/電路「連接在」兩個節點之間時，它可以是直接耦接或連接到另一元件或者可以存在中間元件，元件之間的連接可以是物理上的、邏輯上的、或者其結合。相反，當稱元件「直接耦接到」或「直接連接到」另一元件時，意味著兩者不存在中間元件。Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is referred to as being "connected" to another element or an element/circuit is "connected" between two nodes, it can be directly coupled or connected to the other element or there may be intervening elements, the connection between the elements Connections may be physical, logical, or a combination thereof. In contrast, when an element is referred to as being "directly coupled" or "directly connected" to another element, it means that there are no intervening elements present.

除非上下文明確要求，否則在說明書的「包含」、「包含」等類似詞語應當解釋為包含的含義而不是排他或窮舉的含義；也就是說，是「包含但不限於」的含義。Unless the context clearly requires, words such as "comprising", "comprising" and the like in the specification should be construed in an inclusive rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

在本創作的描述中，需要理解的是，術語「第一」、「第二」等僅用於描述目的，而不能理解為指示或暗示相對重要性。此外，在本創作的描述中，除非另有說明，「多個」的含義是兩個或兩個以上。In the description of the present creation, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of the present creation, unless otherwise specified, the meaning of "plurality" is two or more.

除非另有明確的規定和限定，術語「安裝」、「相連」、「連接」、「固定」等術語應做廣義理解，例如，可以是固定連接，也可以是可拆卸連接，或成一體；可以是機械連接，也可以是電連接；可以是直接相連，也可以通過中間媒介間接相連，可以是兩個元件內部的連通或兩個元件的相互作用關係，除非另有明確的限定。對於所屬技術領域中具有通常知識者而言，可以根據具體情況理解上述術語在本創作中的具體含義。Unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise clearly defined. Those with ordinary knowledge in the technical field can understand the specific meanings of the above terms in the present creation according to specific situations.

如圖1至5和圖8所示，本創作實施例的微型揚聲器包含外殼1、發聲元件2、發聲口3、通道5和振動板6。其中，外殼1具有內部空間11，內部空間11包含前腔111、後腔112和共振腔4。發聲元件2設定在內部空間11中，分隔前腔111和後腔112。發聲口3設定在外殼1上，連通前腔111與外殼1外部。通道5設定在外殼1內部，兩端分別連通前腔111和共振腔4。振動板6分隔後腔112和共振腔4，用於調節共振腔4的共振頻率。微型揚聲器的前腔111用於中頻發聲，但中頻因前腔111共振會產生一個較為尖銳刺耳的聲音，在頻響曲線上表現為在中頻附近出現一個尖銳的峰值，導致揚聲器在中頻發聲失真，因此本實施例設定了共振腔4和通道5，利用亥姆霍茲共振原理透過共振腔4和通道5來對發聲口3的空氣運動形成阻尼，從而降低前腔111共振所導致的中頻失真。As shown in FIGS. 1 to 5 and FIG. 8 , the micro-speaker of this creative embodiment includes a housing 1 , a sound-emitting element 2 , a sound-emitting port 3 , a channel 5 and a vibration plate 6 . The housing 1 has an inner space 11 , and the inner space 11 includes a front cavity 111 , a rear cavity 112 and a resonance cavity 4 . The sounding element 2 is set in the inner space 11 to separate the front cavity 111 and the rear cavity 112 . The sounding port 3 is set on the casing 1 and communicates with the front cavity 111 and the outside of the casing 1 . The channel 5 is set inside the casing 1 , and the two ends are respectively connected to the front cavity 111 and the resonance cavity 4 . The vibration plate 6 separates the rear cavity 112 and the resonance cavity 4 for adjusting the resonance frequency of the resonance cavity 4 . The front cavity 111 of the micro-speaker is used for mid-frequency sound, but the mid-frequency will produce a sharper and harsher sound due to the resonance of the front cavity 111. On the frequency response curve, a sharp peak appears near the mid-frequency, causing the speaker to be in the middle. Therefore, the resonant cavity 4 and the channel 5 are set in this embodiment, and the Helmholtz resonance principle is used to damp the air movement of the sounding port 3 through the resonant cavity 4 and the channel 5, thereby reducing the resonance caused by the front cavity 111. IF distortion.

根據亥姆霍茲共振原理可知共振腔4的共振頻率計算公式為：

其中，S為通道5的橫截面積；L為通道5的長度；

為共振腔4的體積。 According to the Helmholtz resonance principle, the calculation formula of the resonance frequency of the resonant cavity 4 is:

Wherein, S is the cross-sectional area of the channel 5; L is the length of the channel 5;

is the volume of the resonant cavity 4 .

即在通道5的長度和橫截面積不變的情況下，共振腔4的體積越大，則其共振頻率越低。但是在微型揚聲器中，受系統空間限制，共振腔4的體積大小有限，導致其共振頻率很高，不能很好的實現平滑中頻處頻響曲線峰值，降低中頻失真的效果。因此，本實施例還設定了振動板6，在發聲過程中振動板6能夠透過振動發生位移，在空氣進入共振腔4時增大共振腔4的最大容積，從而降低共振腔4的共振頻率。綜上，本實施例透過設定振動板6，降低了共振腔4的共振頻率，從而平滑了中頻附近頻響曲線的峰值，減少了揚聲器中頻發聲失真，提高了揚聲器發聲品質。That is, under the condition that the length and cross-sectional area of the channel 5 remain unchanged, the larger the volume of the resonant cavity 4, the lower the resonant frequency thereof. However, in the miniature loudspeaker, due to the limitation of the system space, the volume of the resonant cavity 4 is limited, resulting in a high resonant frequency, which cannot well achieve the effect of smoothing the peak of the frequency response curve at the intermediate frequency and reducing the distortion of the intermediate frequency. Therefore, this embodiment also sets a vibrating plate 6, which can be displaced by vibration during the sound production process, and increases the maximum volume of the resonant cavity 4 when air enters the resonant cavity 4, thereby reducing the resonant frequency of the resonant cavity 4. To sum up, by setting the vibrating plate 6 in this embodiment, the resonant frequency of the resonant cavity 4 is reduced, thereby smoothing the peak of the frequency response curve near the intermediate frequency, reducing the mid-frequency sound distortion of the speaker, and improving the speaker sound quality.

如圖2所示，在一種具體的實施方式中，振動板6包含高分子振膜61和中貼板62。其中，高分子振膜61呈環形設定在內部空間11中，且環形外側邊緣與外殼1固定連接。中貼板62設定在內部空間11中，與高分子振膜61的環形內側邊緣固定連接。高分子振膜61具有彈性，當揚聲器以中頻進行發聲時，將會有振動的空氣進入共振腔4中，此時高分子振膜61將向後腔112方向運動，使得共振腔4中容積增大，從而使共振腔共振頻率降低，起到平滑中頻附近頻響曲線的峰值，減少了揚聲器中頻發聲失真的作用。為了避免高分子振膜61本身發聲共振導致諧波失真，高分子振膜61的最低諧振頻率應高於共振腔4共振頻率。本實施例中高分子振膜61的最低諧振頻率約為10kHz，經測試，共振腔4在未設定振動板6的情況下共振頻率約為5.5kHz，設定有振動板6後下降到約4.5kHz。由於高分子振膜61的生產工序較為複雜，生產不同厚度的高分子振膜61的成本較高，因此本實施例在高分子振膜61中間設定了中貼板62，中貼板62採用楊氏模量較高且密度交底的材質，能夠隨高分子振膜61進行運動。在揚聲器規格發生變化時，不需要使用不同厚度的高分子振膜61，只需要調整中貼板62的大小，即可改變高分子振膜61的振動幅度，滿足不同規格的揚聲器需求。As shown in FIG. 2 , in a specific embodiment, the vibration plate 6 includes a polymer vibration film 61 and a middle plate 62 . The polymer diaphragm 61 is annularly set in the inner space 11 , and the outer edge of the annular shape is fixedly connected to the housing 1 . The middle plate 62 is set in the inner space 11 and is fixedly connected with the annular inner edge of the polymer diaphragm 61 . The polymer diaphragm 61 has elasticity. When the speaker emits sound at an intermediate frequency, there will be vibrating air entering the resonant cavity 4. At this time, the polymer diaphragm 61 will move in the direction of the rear cavity 112, so that the volume in the resonant cavity 4 increases. This reduces the resonant frequency of the resonant cavity, smoothes the peak of the frequency response curve near the intermediate frequency, and reduces the distortion of the speaker at the intermediate frequency. In order to avoid harmonic distortion caused by the sound resonance of the polymer diaphragm 61 itself, the lowest resonance frequency of the polymer diaphragm 61 should be higher than the resonance frequency of the resonant cavity 4 . In this embodiment, the lowest resonance frequency of the polymer diaphragm 61 is about 10 kHz. After testing, the resonance frequency of the resonant cavity 4 is about 5.5 kHz when the vibration plate 6 is not set, and it drops to about 4.5 kHz after the vibration plate 6 is set. Because the production process of the polymer diaphragm 61 is relatively complicated, and the cost of producing the polymer diaphragm 61 with different thicknesses is relatively high, in this embodiment, a middle plate 62 is set in the middle of the polymer diaphragm 61, and the middle plate 62 is made of The material with high modulus and low density can move with the polymer diaphragm 61 . When the loudspeaker specifications change, it is not necessary to use polymer diaphragms 61 with different thicknesses, and only need to adjust the size of the middle plate 62 to change the vibration amplitude of the polymer diaphragms 61 to meet the needs of loudspeakers of different specifications.

在一種具體的實施方式中，高分子振膜61與外殼1和中貼板62之間透過膠水進行固定。由於膠水品質較輕且柔性較好，使用膠水進行固定能夠在固定的同時不影響高分子振膜61的振動效能。In a specific embodiment, the polymer diaphragm 61 is fixed to the housing 1 and the middle plate 62 through glue. Since the quality of the glue is relatively light and flexible, the use of glue for fixing can not affect the vibration performance of the polymer diaphragm 61 while fixing.

在一種具體的實施方式中，中貼板62採用鋁或銅材質。成本較低且容易調整，使用效果較好。In a specific embodiment, the middle board 62 is made of aluminum or copper. The cost is low and easy to adjust, and the use effect is better.

在一種具體的實施方式中，後腔112的容積大於前腔111，使後腔112能夠更好的發出頻率較低的聲音。前腔111的容積大於共振腔4，前腔111用於中頻發聲，共振腔4只對前腔111的發聲起調整作用，使揚聲器的中頻發聲品質更高。In a specific embodiment, the volume of the rear cavity 112 is larger than that of the front cavity 111 , so that the rear cavity 112 can better emit lower frequency sounds. The volume of the front cavity 111 is larger than that of the resonant cavity 4, and the front cavity 111 is used for mid-frequency sound. The resonant cavity 4 only adjusts the sound of the front cavity 111, so that the mid-frequency sound quality of the speaker is higher.

如圖7所示，在一種具體的實施方式中，發聲元件2包含振膜21、音圈22和磁體23。振膜21設定在內部空間11中，將內部空間11分隔為前腔111和後腔112。音圈22與振膜21固定連接，用於帶動振膜21振動。磁體23與音圈22相鄰的固定在內部空間11中，用於提供音圈22運動所需磁場。發聲元件2的發聲原理為音圈22中通入電訊號產生電磁場，由於音圈22處於磁體23的磁場中，音圈22產生的電磁場會與磁體23的磁場相互作用產生磁力，隨著音圈22中電訊號的變化，音圈22所受到的磁力也會變化，音圈22即在磁力的作用下進行運動。由於振膜21與音圈22固定連接，因此振膜21也會在音圈22的帶動下進行運動，從而振動完成發聲。具體的，音圈22與揚聲器驅動電路連接，用於承載驅動電流的流通。揚聲器驅動電路會根據指令將不同的電訊號以驅動電流的形式輸入音圈22中，使音圈22在磁場中受力運動，帶動振膜21完成發聲。As shown in FIG. 7 , in a specific embodiment, the sound generating element 2 includes a diaphragm 21 , a voice coil 22 and a magnet 23 . The diaphragm 21 is set in the inner space 11 and divides the inner space 11 into a front cavity 111 and a rear cavity 112 . The voice coil 22 is fixedly connected to the diaphragm 21 for driving the diaphragm 21 to vibrate. The magnet 23 is fixed in the inner space 11 adjacent to the voice coil 22 for providing a magnetic field required for the movement of the voice coil 22 . The sounding principle of the sounding element 2 is that an electric signal is passed into the voice coil 22 to generate an electromagnetic field. Since the voice coil 22 is in the magnetic field of the magnet 23 , the electromagnetic field generated by the voice coil 22 will interact with the magnetic field of the magnet 23 to generate a magnetic force. With the change of the medium electric signal, the magnetic force on the voice coil 22 will also change, and the voice coil 22 moves under the action of the magnetic force. Since the diaphragm 21 is fixedly connected with the voice coil 22, the diaphragm 21 also moves under the driving of the voice coil 22, so that the vibration completes the sound production. Specifically, the voice coil 22 is connected to the speaker driving circuit for carrying the circulation of the driving current. The speaker driving circuit will input different electrical signals into the voice coil 22 in the form of driving current according to the instructions, so that the voice coil 22 is forced to move in the magnetic field, and drives the diaphragm 21 to complete sound production.

如圖6所示，在一種具體的實施方式中，外殼1包含上殼體12和下殼體13。下殼體13與上殼體12可拆卸連接，共同圍成內部空間11。將外殼1分為上下兩部分，能夠方便內部空間11中各零部件的安裝，也使得前腔111、後腔112和共振腔4更容易製造成型。As shown in FIG. 6 , in a specific embodiment, the housing 1 includes an upper casing 12 and a lower casing 13 . The lower casing 13 and the upper casing 12 are detachably connected to form an inner space 11 together. Dividing the housing 1 into upper and lower parts can facilitate the installation of various components in the inner space 11 , and also make the front cavity 111 , the rear cavity 112 and the resonance cavity 4 easier to manufacture.

在一種具體的實施方式中，外殼1還包含連接件14。連接件14設定在內部空間11中，且分別與上殼體12和下殼體13可拆卸連接，發聲元件2和振動板6分別固定在連接件14上。透過設定連接件14可以使發聲元件2和振動板6的安裝更加方便，也使得整個揚聲器的組裝更加方便。並且連接件14可以輔助發聲元件2和振動板6共同將內部空間11切分為前腔111、後腔112和共振腔4三部分，提高了三部分之間的密封性，進一步提高了微型揚聲器的品質。In a specific embodiment, the housing 1 also includes a connector 14 . The connecting piece 14 is set in the inner space 11 and is detachably connected with the upper casing 12 and the lower casing 13 respectively, and the sounding element 2 and the vibration plate 6 are respectively fixed on the connecting piece 14 . By setting the connecting piece 14, the installation of the sounding element 2 and the vibration plate 6 can be made more convenient, and the assembly of the whole speaker can also be made more convenient. And the connecting piece 14 can assist the sounding element 2 and the vibrating plate 6 to jointly divide the internal space 11 into three parts: the front cavity 111, the rear cavity 112 and the resonance cavity 4, which improves the sealing between the three parts and further improves the micro-speaker. quality.

以上所述僅為本創作的理想實施例，並不用於限制本創作，對於所屬技術領域中具有通常知識者而言，本創作可以有各種改動和變化。凡在本創作的精神和原理之內所作的任何修改、均等替換、改進等，均應包含在本創作的保護範圍之內。The above descriptions are only ideal embodiments of the present creation, and are not intended to limit the present creation. For those with ordinary knowledge in the technical field, the present creation may have various modifications and changes. Any modification, equal replacement, improvement, etc. made within the spirit and principle of this creation shall be included in the protection scope of this creation.

本創作實施例的微型揚聲器除在外殼1內設定前腔111、後腔112、共振腔4、通道5、發聲口3和發聲元件2之外，還在共振腔4與後腔112之間設定了振動板6，透過振動板6的振動，可以使共振腔4的容積發生改變，從而降低共振腔4的共振頻率，使共振腔4能夠更好的起到平滑中頻處頻響曲線峰值的效果，減少了揚聲器的中頻失真，提高了揚聲器中頻發聲的品質。In addition to setting the front cavity 111 , the rear cavity 112 , the resonant cavity 4 , the channel 5 , the sounding port 3 and the sounding element 2 in the housing 1 , the micro-speaker of this creative embodiment is also set between the resonant cavity 4 and the rear cavity 112 The vibration of the vibration plate 6 can change the volume of the resonant cavity 4, thereby reducing the resonant frequency of the resonant cavity 4, so that the resonant cavity 4 can better smooth the peak of the frequency response curve at the intermediate frequency. The effect is to reduce the mid-frequency distortion of the speaker and improve the quality of the mid-frequency sound of the speaker.

1:外殼 11:內部空間 111:前腔 112:後腔 12:上殼體 13:下殼體 14:連接件 2:發聲元件 21:振膜 22:音圈 23:磁體 3:發聲口 4:共振腔 5:通道 6:振動板 61:高分子振膜 62:中貼板 1: Shell 11: Internal space 111: Front cavity 112: Back cavity 12: Upper shell 13: Lower shell 14: Connectors 2: sound element 21: Diaphragm 22: Voice coil 23: Magnets 3: Voice mouth 4: Resonant cavity 5: Channel 6: Vibration plate 61: Polymer diaphragm 62: Middle board

〔圖1〕本實施例提供的微型揚聲器的整體結構示意圖。〔圖2〕本實施例提供的微型揚聲器的部分結構分解示意圖。〔圖3〕本實施例提供的微型揚聲器的內部結構剖面示意圖之一。〔圖4〕本實施例提供的微型揚聲器的內部結構剖面示意圖之二。〔圖5〕本實施例提供的圖4中A處結構放大示意圖。〔圖6〕本實施例提供的外殼的具體結構分解示意圖。〔圖7〕本實施例提供的發聲元件的具體結構示意圖。〔圖8〕本實施例提供的微型揚聲器的內部結構示意圖。 [FIG. 1] A schematic diagram of the overall structure of the micro-speaker provided in this embodiment. [FIG. 2] An exploded schematic diagram of a part of the structure of the micro-speaker provided in this embodiment. [FIG. 3] One of the schematic cross-sectional views of the internal structure of the micro-speaker provided in this embodiment. [FIG. 4] The second schematic cross-sectional view of the internal structure of the micro-speaker provided in this embodiment. [FIG. 5] An enlarged schematic diagram of the structure at A in FIG. 4 provided in this embodiment. [FIG. 6] An exploded schematic diagram of the specific structure of the housing provided in this embodiment. [FIG. 7] A schematic diagram of the specific structure of the sound-emitting element provided in this embodiment. [FIG. 8] A schematic diagram of the internal structure of the micro-speaker provided in this embodiment.

1:外殼 1: Shell

2:發聲元件 2: sound element

3:發聲口 3: Voice mouth

6:振動板 6: Vibration plate

11:內部空間 11: Internal space

12:上殼體 12: Upper shell

13:下殼體 13: Lower shell

14:連接件 14: Connectors

61:高分子振膜 61: Polymer diaphragm

62:中貼板 62: Middle board

Claims

一種微型揚聲器，其特徵係包含：外殼(1)，具有內部空間(11)，該內部空間(11)包含前腔(111)、後腔(112)和共振腔(4)；發聲元件(2)，設定在該內部空間(11)中，分隔該前腔(111)和該後腔(112)；發聲口(3)，設定在該外殼(1)上，連通該前腔(111)與該外殼(1)外部；通道(5)，設定在該外殼(1)內部，兩端分別連通該前腔(111)和該共振腔(4)；以及振動板(6)，分隔該後腔(112)和該共振腔(4)，用於調節該共振腔(4)的共振頻率。 A micro-speaker is characterized by comprising: a housing (1) having an inner space (11) comprising a front cavity (111), a rear cavity (112) and a resonance cavity (4); a sounding element (2), set in the inner space (11), separating the front cavity (111) and the rear cavity (112); A sounding port (3), set on the casing (1), communicates with the front cavity (111) and the outside of the casing (1); A channel (5) is set inside the casing (1), and the two ends are respectively connected to the front cavity (111) and the resonance cavity (4); and The vibrating plate (6) separates the rear cavity (112) and the resonance cavity (4), and is used for adjusting the resonance frequency of the resonance cavity (4).

如請求項1所述之揚聲器，其中，該振動板(6)包含：高分子振膜(61)，呈環形設定在該內部空間(11)中，且環形外側邊緣與該外殼(1)固定連接；和中貼板(62)，設定在該內部空間(11)中，與該高分子振膜(61)的環形內側邊緣固定連接。 The loudspeaker as claimed in claim 1, wherein the vibration plate (6) comprises: a polymer diaphragm (61), set in the inner space (11) in a ring shape, and the outer edge of the ring is fixedly connected to the housing (1); and The middle plate (62) is set in the inner space (11), and is fixedly connected with the annular inner edge of the polymer diaphragm (61).

如請求項2所述之揚聲器，其中，該高分子振膜(61)與該外殼(1)和該中貼板(62)之間透過膠水進行固定。The loudspeaker according to claim 2, wherein the polymer diaphragm (61), the shell (1) and the middle plate (62) are fixed through glue.

如請求項3所述之揚聲器，其中，該中貼板(62)採用鋁或銅材質。The loudspeaker according to claim 3, wherein the middle plate (62) is made of aluminum or copper.

如請求項1所述之揚聲器，其中，該後腔(112)的容積大於該前腔(111)，該前腔(111)的容積大於該共振腔(4)。The loudspeaker according to claim 1, wherein the volume of the rear cavity (112) is larger than that of the front cavity (111), and the volume of the front cavity (111) is larger than that of the resonance cavity (4).

如請求項1所述之揚聲器，其中，該發聲元件(2)包含：振膜(21)，設定在該內部空間(11)中，將該內部空間(11)分隔為前腔(111)和後腔(112)；音圈(22)，與該振膜(21)固定連接，用於帶動該振膜(21)振動；和磁體(23)，與該音圈(22)相鄰的固定在該內部空間(11)中，用於提供該音圈(22)運動所需磁場。 The loudspeaker as claimed in claim 1, wherein the sounding element (2) comprises: The diaphragm (21) is set in the inner space (11), and the inner space (11) is divided into a front cavity (111) and a rear cavity (112); a voice coil (22), fixedly connected with the diaphragm (21), for driving the diaphragm (21) to vibrate; and A magnet (23), which is fixed in the inner space (11) adjacent to the voice coil (22), is used for providing the magnetic field required for the movement of the voice coil (22).

如請求項6所述之揚聲器，其中，該音圈(22)與揚聲器驅動電路連接，用於承載驅動電流的流通。The loudspeaker according to claim 6, wherein the voice coil (22) is connected to the loudspeaker driving circuit for carrying the circulation of the driving current.

如請求項1所述之揚聲器，其中，該外殼(1)包含：上殼體(12)；和下殼體(13)，與該上殼體(12)可拆卸連接，共同圍成該內部空間(11)。 The loudspeaker of claim 1, wherein the housing (1) comprises: upper housing (12); and The lower casing (13) is detachably connected with the upper casing (12) to jointly enclose the inner space (11).

如請求項8所述之揚聲器，其中，該外殼(1)還包含：連接件(14)，設定在該內部空間(11)中，且分別與該上殼體(12)和該下殼體(13)可拆卸連接，該發聲元件(2)和該振動板(6)分別固定在該連接件(14)上。 The loudspeaker as claimed in claim 8, wherein the housing (1) further comprises: A connecting piece (14) is set in the inner space (11), and is detachably connected to the upper casing (12) and the lower casing (13) respectively, the sounding element (2) and the vibration plate (6) ) are respectively fixed on the connecting piece (14).