200816848 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種揚聲裝置，詳言之，係一種具有壓 電振動元件之揚聲裝置。 【先前技術】 參考圖1，其顯示習知喇叭之示意圖。該喇叭丨包括一框 體U、一軛鐵12、一音圈13及一鼓紙14。該軛鐵12係由磁 fl 鐵所構成，該軛鐵12設置於該框體11之外部。該音圈13設 置於忒軛鐵12上。該鼓紙14貼設於該音圈13與該框體η之 間。一般而言，體積較大之喇,八僅能發出較低音頻，而體 積較小之喇σ八僅能發出較高音頻，故無法同時發出高頻、 中頻、低頻之音域’且習知喇叭容易所發出雜訊，因此降 低音質。 另外該t知剩口八！之組成疋件，例如··該框體11及該 軛鐵12,兩者皆具有體積大、重量重之問題。再者，該習[Technical Field] The present invention relates to a speaker device, and more particularly to a speaker device having a piezoelectric vibration element. [Prior Art] Referring to Figure 1, there is shown a schematic diagram of a conventional horn. The horn includes a frame U, a yoke 12, a voice coil 13 and a drum paper 14. The yoke 12 is made of magnetic flia iron, and the yoke 12 is provided outside the casing 11. The voice coil 13 is placed on the yoke yoke 12. The drum paper 14 is attached between the voice coil 13 and the frame n. In general, the larger ones, the eight can only emit lower audio, and the smaller ones can only emit higher audio, so the high frequency, intermediate frequency, and low frequency range cannot be simultaneously emitted. The speaker is easy to emit noise, thus reducing the sound quality. In addition, the t knows the remaining eight! The components, for example, the frame 11 and the yoke 12, both have a large volume and a heavy weight. Furthermore, the study
知之喇叭1之組成元件多且複雜，故組裝時較為困難，因 此會增加生產時間及生產成本。 因此，有必要提供一創新且富有進步性之揚聲，以 解決上述問題。 & 【發明内容】 本發明之目的在於提供一種揚聲裝置，其包括：一歷電 振動元件及一金屬共振單體。該壓電振動元件用以依據一 音源訊號，以發线響1金屬共振單體輿_電振動元 件接觸’用以與該聲響產生頻率響應及將該聲響放大以 U4381.doc 200816848 形成-響應音調，在__設定頻率範圍内，該響應音調具有 穩定且不易衰減之振幅。 本發明之另一目的在於提供一種金屬共振單體，該金屬 共振單體係為一殼體，内部具有一共振空間且具有一開 口，其材貝係為鎂合金、鎂鋁合金或不銹鋼，該金屬共振 單體表面係經氧化處理。 本發明之該揚聲裝置之該壓電振動元件具有極薄之厚 度，故可減少該揚聲裝置之體積。該金屬共振單體則可與 該壓電振動元件所產生之該聲響產生頻率響應，且將該聲 曰放大另外’該金屬共振單體具有高剛性及易鑄造成形 之特性，以及極佳之頻率響應及較佳之力學穩定性，因 此’可使該揚聲裝置產生更宏亮及更單純之音頻。 再者’該揚聲裝置可連接至如MP3播放器、音響、手 機、收音機等音源裝置，故應用非常廣泛。另外，本發明 之該揚聲裝置由該控制裝置、該壓電振動元件、該金屬共 振單體及該罩體組成，相較於習知具有體積大、重量重之 框體及軛鐵之喇叭，本發明之該揚聲裝置具有較簡單之結 構且組裝容易，故可節省生產時間及生產成本。 【實施方式】 參考圖2，其顯示本發明揚聲裝置之示意圖。該揚聲裝 置2包括一控制裝置21、一壓電振動元件22、一金屬共振 單體23及一罩體24。該控制裝置21具有一音訊輸入端 211、一音訊輪出端212及一音頻放大器213，該音訊輸入 端211連接至一音源裝置25，該音源裝置25提供一輸入音 114381.doc 200816848 源訊號至該揚聲裝置2。該音源裝置25可為一 MP3播放 器、音響、手機、收音機等音源裝置。該音頻放大器213 連接於d亥音訊輸入端211及該音訊輸出端212之間，用以將 該輸入音源訊號放大，且由該音訊輸出端212輸出經放大 之音源訊號至該壓電振動元件22。 該壓電振動元件22接收來自該音訊輸出端212之該經放 大之音源訊號’以發出聲響。該壓電振動元件22之成分係 以錯鈦酸鉛（pzt)為主，且添加微量氧化锆（Zr〇2)、氧化鉛 (PbO)及氧化鈦（TiOJ，且於丨35〇。(：溫度下燒結而成。該壓 電振動元件22與該金屬共振單體23接觸並設置於該金屬共 振單體23上。在該實施例中，該壓電振動元件22係以膠合 方式設置於該金屬共振單體23上，在其他應用中，該壓電 振動元件22亦可利用一膠帶貼設於該金屬共振單體23上。 該金屬共振單體23用以與該聲響產生頻率響應及將該聲 響放大，以形成一響應音調。在一設定頻率範圍内，該響 ά曰調具有穩疋且不易哀減之振幅。在該實施例中，該金 屬共振單體23係為鎂合金，該金屬共振單體23係以鑄造方 式製成，較佳地，該金屬共振單體23係以擠壓鑄造方式製 成。另外，在鑄造製成該金屬共振單體23後，可另將該金 屬共振單體23表面經一氧化處理（例如微弧氧化處理），以 將該金屬共振單體23表面形成一保護層，防止該金屬共振 單體23鏽蝕。 另外’在其他應用上，該金屬共振單體23亦可為銘合 金、鎂紹合金或不銹鋼等材質所製成，鋁合金、鐫合金以 11438l.d, 200816848 • *鎂紹合金皆具有質輕、高剛性且易壓鑄成形之特性，以 及極佳之頻率響應及較佳之力學穩定性，故不容易產生其 他雜訊音頻。 該金屬共振單體23係為一殼體，在該實施例中，該金屬 共振單體23係為-圓筒狀，該金屬共振單體23内部具有一 共振空間23丨且具有一開口 232。藉由該共振^間23ι可使 得該響應音調變得更清楚，該響應音調則經由該開口… - 傳至該罩體24内。 該罩體24用以容設該壓電振動元件22及該金屬共振單體 23。在該實施例中，該罩體24係為陶竟材質，該罩體^包 括-底座241及-上罩242 ’且該上罩242具有複數個開孔 243。因陶瓷材質燒結後具有等方向性且陶瓷材質為多 孔性材質具有制振性佳之特性，故陶瓷材質之該罩體以極 適合作為共振箱。由該壓電振動元件22所發出之聲響，首 先由該金屬共振單體23經頻率響應且放大，以形成該響應 U 音調，接著該響應音調再於該罩體24内反射，最後經由該 上罩24之該等開孔243傳出至外界。 參考圖3 ’其顯示本發明揚聲裝置2之頻率響鹿之示音 圖，其中L1為左聲道之響應曲線；L2為右聲道之響應曲 線。由圖中可以得知，左、右二個聲道之音頻基本上一 致，且L1及L2二曲線較為平直，高、中、低三頻段較為平 均，頻率在IK Hz至6K Hz之間只有形成一個波峰，頻率在 6K Hz之後才開始出現較多之谷峰。由於Li*。二曲線較 為平直，對於聽感而言會使還原較為平衡，且音頻較單純 114381.doc -10· 200816848 而沒有雜訊。 由上述可知，本發明之該揚聲裝置2具有良好之頻率響 應，即在每—個頻率點都能輸出穩定振幅之訊號，且每一 個頻率點輪出訊號之大小相同。甚至在訊號重建較困難之 低頻及高頻部分，也無訊號衰減之問題產生。本發明之該 揚聲裝置2之響應曲線極為平直，其表示所能輸出之較： 之響應音調。 Γ 本發明之該揚聲裝置2之該壓電振動元件22具有極薄之 厚度，故可減少該揚聲裝置2之體積。該金屬共振單體Μ 則可與該壓電振動元件22所產生之該聲 且將該聲響放大。另外，該金屬共振單體2J:;:及 易C鑄成形之特性，以及極佳之頻率響應及較佳之力學穩 定，因此，可使該揚聲裝置2產生更宏亮及更單純之響 應音調。 再者，該揚聲裝置2可連接至如MP3播放器、音響、手 」 機、收音機等音源裝置，故應用非常廣泛。另外，本發明 之該揚聲裝置2由該控制裝置21、該壓電振動元件22、該 金屬振單體23及該罩體24組成，相較於習知具有體積 大、重量重之框體及軛鐵之喇叭，本發明之該揚聲裝置2 具有較簡單之結構且組裝容易，故可節省生產時間及生產 成本。 上述實施例僅為說明本發明之原理及其功效，並非限制 本發明。因此習於此技術之人士對上述實施例進行修改及 變化仍不脫本發明之精神。本發明之權利範圍應如後述之 114381.doc -11 - 200816848 申請專利範圍所列。 【圖式簡單說明】 圖1顯示習知°刺σ八之示意圖； 圖2顯示本發明揚聲裝置之示意圖；及 圖3顯示本發明揚聲裝置之頻率響應之示意圖。 【主要元件符號說明】 1 習知之°刺队 2 本發明之揚聲裝置 11 框體 12 扼鐵 13 音圈 14 鼓紙 21 控制裝置 22 壓電振動元件 23 金屬共振單體 24 罩體 25 音源裝置 211 音訊輸入端 212 音訊輸出端 213 音頻放大器 231 共振空間 232 開口 241 底座 242 上罩 243 開孔 114381.doc -12·Knowing that the speaker 1 has many components and is complicated, it is difficult to assemble, which increases production time and production cost. Therefore, it is necessary to provide an innovative and progressive voice to solve the above problems. SUMMARY OF THE INVENTION An object of the present invention is to provide a speaker apparatus comprising: a calendar electric vibrating element and a metal resonant unit. The piezoelectric vibrating element is configured to generate a response-tone by using a sound source signal to emit a metal resonant cell 舆_electric vibrating element contact 'to generate a frequency response with the sound and amplify the sound to U4381.doc 200816848 The response tone has an amplitude that is stable and not easily attenuated within the __ set frequency range. Another object of the present invention is to provide a metal resonance monomer, which is a casing having a resonance space inside and having an opening, the material of which is a magnesium alloy, a magnesium alloy or a stainless steel. The surface of the metal resonance monomer is oxidized. The piezoelectric vibration element of the speaker apparatus of the present invention has an extremely thin thickness, so that the volume of the speaker apparatus can be reduced. The metal resonant cell can generate a frequency response with the sound generated by the piezoelectric vibrating element, and amplify the sonar. The metal resonant cell has high rigidity and easy casting, and an excellent frequency. The response and better mechanical stability, so 'the speaker can produce more loud and simple audio. Furthermore, the speaker device can be connected to a sound source device such as an MP3 player, an audio, a mobile phone, a radio, etc., so that the application is very extensive. In addition, the speaker device of the present invention is composed of the control device, the piezoelectric vibration element, the metal resonance unit and the cover body, and has a large-volume, heavy-weight frame body and a yoke speaker. The speaker device of the present invention has a relatively simple structure and is easy to assemble, so that production time and production cost can be saved. [Embodiment] Referring to Figure 2, there is shown a schematic diagram of a speaker apparatus of the present invention. The speaker device 2 includes a control device 21, a piezoelectric vibration element 22, a metal resonance unit 23, and a cover 24. The control device 21 has an audio input terminal 211, an audio wheel output terminal 212 and an audio amplifier 213. The audio input terminal 211 is connected to a sound source device 25, and the sound source device 25 provides an input sound 114381.doc 200816848 source signal to The speaker device 2. The sound source device 25 can be an audio source device such as an MP3 player, an audio, a mobile phone, or a radio. The audio amplifier 213 is connected between the audio input terminal 211 and the audio output terminal 212 for amplifying the input sound source signal, and the amplified audio source signal is output from the audio output terminal 212 to the piezoelectric vibration component 22 . . The piezoelectric vibration element 22 receives the amplified source signal ' from the audio output terminal 212 to emit an audible sound. The piezoelectric vibrating element 22 is mainly composed of lead zirconate (pzt), and is added with a trace amount of zirconium oxide (Zr〇2), lead oxide (PbO), and titanium oxide (TiOJ, and is 丨35〇. The piezoelectric vibration element 22 is in contact with the metal resonance unit 23 and is disposed on the metal resonance unit 23. In this embodiment, the piezoelectric vibration element 22 is glued to the On the metal resonant unit 23, in other applications, the piezoelectric vibration element 22 can also be attached to the metal resonant unit 23 by a tape. The metal resonant unit 23 is used to generate a frequency response with the sound and The sound is amplified to form a response tone. The amplitude of the ring is stable and not easily damped in a set frequency range. In this embodiment, the metal resonant cell 23 is a magnesium alloy. The metal resonant monomer 23 is made by casting. Preferably, the metal resonant monomer 23 is formed by extrusion casting. In addition, after the metal resonant monomer 23 is cast, the metal can be further The surface of the resonance monomer 23 is subjected to oxidation treatment (for example, micro-arc oxidation) The surface of the metal resonant monomer 23 is formed into a protective layer to prevent the metal resonant monomer 23 from rusting. In addition, in other applications, the metal resonant monomer 23 may also be an alloy, a magnesium alloy or a stainless steel. Made of other materials, aluminum alloy, niobium alloy with 11438l.d, 200816848 • * Magnesium alloy has the characteristics of light weight, high rigidity and easy die-casting, as well as excellent frequency response and better mechanical stability, so The other metal audio is not easily generated. The metal resonant unit 23 is a housing. In this embodiment, the metal resonant unit 23 is a cylindrical shape, and the metal resonant unit 23 has a resonance space inside. 23丨 has an opening 232. The response tone can be made clear by the resonance 23p, and the response tone is transmitted to the cover body 24 via the opening. The cover body 24 is used for accommodating The piezoelectric vibrating element 22 and the metal resonant unit 23. In this embodiment, the cover 24 is made of a ceramic material, and the cover body includes a base 241 and an upper cover 242' and the upper cover 242 has Multiple openings 243. sintered by ceramic material The ceramic material has a uniform directionality and the porous material has the characteristics of good vibration damping property. Therefore, the ceramic material is preferably suitable as a resonance box. The sound emitted by the piezoelectric vibration element 22 is firstly represented by the metal resonance single. The body 23 is frequency-responsive and amplified to form the response U-tone, and then the response tone is reflected in the cover 24 and finally transmitted to the outside through the openings 243 of the upper cover 24. Referring to Figure 3 A sound diagram showing the frequency of the speaker device 2 of the present invention, wherein L1 is the response curve of the left channel; L2 is the response curve of the right channel. It can be seen from the figure that the left and right channels are The audio is basically the same, and the L1 and L2 two curves are relatively straight. The high, medium and low frequency bands are relatively average. The frequency only forms a peak between IK Hz and 6K Hz, and the frequency starts to appear after 6K Hz. Gu Feng. Thanks to Li*. The two curves are relatively straight, which makes the restoration more balanced for the sense of hearing, and the audio is simpler than 114381.doc -10· 200816848 without noise. It can be seen from the above that the speaker device 2 of the present invention has a good frequency response, that is, a signal of stable amplitude can be outputted at every frequency point, and the size of the round-out signal of each frequency point is the same. Even in the low-frequency and high-frequency parts where signal reconstruction is difficult, there is no problem of signal attenuation. The response of the speaker device 2 of the present invention is extremely straight, which represents the response tone that can be output. The piezoelectric vibration element 22 of the speaker device 2 of the present invention has an extremely thin thickness, so that the volume of the speaker device 2 can be reduced. The metal resonance monomer 可 is coupled to the sound generated by the piezoelectric vibration element 22 and amplifies the sound. In addition, the characteristics of the metal resonance monomer 2J::: and C casting, as well as excellent frequency response and better mechanical stability, can make the speaker device 2 produce a more brilliant and simple response tone. . Furthermore, the speaker device 2 can be connected to a sound source device such as an MP3 player, an audio, a hand, a radio, etc., so that the application is very extensive. In addition, the speaker device 2 of the present invention is composed of the control device 21, the piezoelectric vibration element 22, the metal vibrating unit 23, and the cover body 24, and has a bulky and heavy-weight frame as compared with the conventional one. And the speaker of the yoke, the speaker device 2 of the present invention has a simple structure and is easy to assemble, so that production time and production cost can be saved. The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments without departing from the spirit of the invention. The scope of the claims of the present invention should be as set forth in the scope of the patent application of the s. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a conventional speaker device; Fig. 2 is a view showing a speaker device of the present invention; and Fig. 3 is a view showing a frequency response of the speaker device of the present invention. [Description of main component symbols] 1 Conventional spurs 2 Speaker device 11 of the present invention Frame 12 扼铁 13 Voice coil 14 Drum 21 Control device 22 Piezoelectric vibrating element 23 Resonant unit 24 Cover 25 Source device 211 audio input terminal 212 audio output terminal 213 audio amplifier 231 resonance space 232 opening 241 base 242 upper cover 243 opening 114381.doc -12·