200838346 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種蜂鳴裝置，特別是指一種壓電式 蜂鳴裝置。 【先前技術】 如圖1、2所示，習知之壓電式蜂鳴裝置i具有一上殼 座11 可與该上设座11肷合界定出一共振腔的下殼 座12、一谷置於該共振腔1〇内的蜂鳴單元Η、一第一導 電端子14，及一第二導電端子15。 該下殼座12具有一基盤121，及二間隔地自該基盤 121外表面朝外凸起的圓座122，每一圓座122上形成有一 連通该外界與共振腔1〇的嵌設孔123。該蜂鳴單元u具有 一金屬製的振動片131’及一黏貼於該振動片131上且為陶 瓷材料製成的壓電片132。 該第一、二導電端子14、15是金屬所製成，並分別嵌 設於該下殼座12的二嵌設孔123中。該第一導電端子μ 具有一向外凸出該下殼座12外的第一插桿段141、—自該 第一插桿段141朝該振動片131延伸的第一延伸段142，^ 一點銲於該第一延伸端142前端的第一接觸點143。該第二 導電端子15具有-向外凸出該下殼座12外的第二插桿段 151、一自該第二插桿段151朝該壓電片132延伸的第二延 伸段152,及-點銲於該第二延伸端152前端的第二接觸點 153 〇 利用該第一、二延伸段142、152的彈力，使該第一、 5 200838346 二接觸點143、153可分別而壓觸於該振動片131與該壓電 片132，形成電導通。當該第一、二插桿段141、151與電 源連接時，可形成壓電效應因而使該振動片131而產生機 械變形伸展及收縮，利用快速振動的特性而能發出聲響， 並配合該上殼座11達到共鳴效果。 r 然而，為了能確實定位該第一、二導電端子14、15， 設計上，是讓該下殼座12之二圓座122向外凸出，以增加 該第-、二插桿段141、151的嵌插長度，而此—設料會 下/Λ座11 12肷合後厚度的增加（整個厚度為 6_8mm)，對於應用於電子收費系統（mectr〇nic Toll200838346 IX. Description of the Invention: [Technical Field] The present invention relates to a buzzer device, and more particularly to a piezoelectric buzzer device. [Prior Art] As shown in FIG. 1 and 2, a conventional piezoelectric buzzer device i has a lower housing 12 and a lower housing 12 that can be coupled with the upper housing 11 to define a resonant cavity. a buzzing unit Η in the resonant cavity 1 , a first conductive terminal 14 , and a second conductive terminal 15 . The lower housing 12 has a base 121 and a circular seat 122 which is outwardly protruded from the outer surface of the base 121. Each of the circular bases 122 defines an insertion hole 123 communicating with the external cavity and the resonant cavity 1〇. . The buzzing unit u has a metal vibrating piece 131' and a piezoelectric piece 132 adhered to the vibrating piece 131 and made of a ceramic material. The first and second conductive terminals 14 and 15 are made of metal and are respectively embedded in the two insertion holes 123 of the lower housing 12. The first conductive terminal μ has a first rod segment 141 protruding outward from the lower housing 12, and a first extension 142 extending from the first rod segment 141 toward the vibrating piece 131. a first contact point 143 at the front end of the first extension end 142. The second conductive terminal 15 has a second rod section 151 protruding outward from the lower housing 12, a second extension 152 extending from the second rod section 151 toward the piezoelectric piece 132, and - a second contact point 153 spot welded to the front end of the second extending end 152, using the elastic force of the first and second extending portions 142, 152, so that the first, 5 200838346 two contact points 143, 153 can be respectively pressed The vibrating piece 131 and the piezoelectric piece 132 are electrically connected. When the first and second plunger segments 141, 151 are connected to the power source, a piezoelectric effect can be formed, thereby causing mechanical deformation stretching and contraction of the vibrating piece 131, and the sound can be made by using the characteristics of rapid vibration, and the sound is matched. The housing 11 achieves a resonance effect. r, however, in order to be able to position the first and second conductive terminals 14, 15 in a proper manner, the two round seats 122 of the lower housing 12 are outwardly convex to increase the first and second plunger segments 141, 151 insert length, and this - the thickness of the material will be lower / Λ seat 11 12 after the increase (the entire thickness is 6_8mm), for the application of electronic toll system (mectr〇nic Toll
Cdtion，ETC)之車上機内部的蜂鳴農置而言其厚度將 無法滿足標準值的規範（規範值為6 2mm)。 又 而且，因為該二圓座122是向外凸出的設計，該第_ 二二插桿段141、151會離該蜂鳴單元13較遠，致使該第 一、^，段142、152壓觸於該振動片131與該壓電片 13=1會較為減弱，因而容易有接觸不良的問題。另外 在製造上，該第一、二接觸點143、153 3The thickness of the buzzer inside the car on the Cdtion, ETC) will not meet the standard value specification (standard value is 6 2mm). Moreover, because the two round bases 122 are outwardly convex, the second and second inserting rod segments 141, 151 are farther away from the buzzing unit 13, causing the first, second, and second portions 142, 152 to be pressed. The contact between the vibrating piece 131 and the piezoelectric piece 13 is weakened, so that there is a problem that contact failure is likely to occur. In addition, the first and second contact points 143, 153 3 are manufactured.
Zi- /!_ Xlu 疋在該弟一、- 延伸端142、152前端另外點銲 — 。 于万料成，製程較多且乾時 【發明内容】 因此，本發明之目的，即在提供一種 ，能有效降低厚度，並能改善接觸不良的問題/*，、、衣置 、二導電端子。該外殼單元具有可 於是，本發明之Μ電式蜂鳴裝置，包含 一蜂鳴單元，及一第 -# _ 卜成早7L、 6 200838346 相互丧合並界定出-共振腔的—上殼體與_下殼體，該下 殼體具有-基盤，及二間隔地自該基盤朝内凸起的圓座， 每-圓座上形成有-連通該共振腔與外界的嵌設孔。該蜂 鳴單元是設置於該共振腔内，並具有一振動片，及一魏= 於該振動片上的壓電片。該第一、二導電端子是分別：卡 於該下殼體之：篏設孔中，__導電端子具有一向外凸 出該基盤外的第-插桿段，&_壓觸該振動片的第_延伸 f 段，該第二導電端子具有一向外凸出該基盤外的第二插桿 段，及一壓觸該壓電片的第二延伸段。 干 本發明之功效在於因為該二圓座是朝内凸起，不但可 降低該外殼單元的厚度，同時，也使得該第一、二導電端 子的弟一插杯^又較為接近該蜂鳴單元，因而能使該第 一、二延伸段能確實壓觸該振動片與壓電片，以改善接觸 不良的問題。 【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一個較佳實施例的詳細說明中，將可 清楚的呈現。 如圖3、4所示，本發明之壓電式蜂鳴裝置的較佳實施 例’特別是能應用於電子收費系統（ETC)之車上機内的蜂鳴 1§，該壓電式蜂鳴裝置包含有一外殼單元2、一蜂鳴單元3 、一第一導電端子4，以及一第二導電端子5。 該外殼單元2具有可相互嵌合並界定出一共振腔20的 一上殼體21與一下殼體22。該上殼體21具有一基壁211， 7 200838346 及一自该基壁211周緣向外延伸而可與該下殼體22嵌合的 圍繞壁212。該基壁211上形成有一出音孔213。該下殼體 22具有一基盤221，及二間隔地自該基盤221朝内凸起的 圓座222，每一圓座222上形成有一連通該共振腔2〇與外 界的嵌設孔223。在該較佳實施例中，該上殼體21與下殼 體22組合後的厚度為6.2公釐。 該蜂鳴單it 3是設置於該外殼單元2之共振腔2〇内， 並具有一振動片31，及一黏貼於該振動片31上的壓電片 32。在該較佳實施例中，該振動# 31域鎳的侧合金所 衣成"亥魘電片32為陶瓷材料所製成，其介電常數概為 4000 ° 該第 一導電端子4、5分別嵌卡於該下殼體22之 二搬設孔223 +。該第一導電端子4具有一向外凸出該下 殼體22、之基盤221外的第_插桿段41，及—朝該振動片 31延伸並壓觸該振動片31的第_延伸段&該第二導電 端子/具有一向外凸出該基盤221外的第二插桿段51，: 一朝該壓電片32延伸並壓觸該壓電片32的第二延伸段52 。在該較佳實施例中，該第―、二導電件4、5之第一、二 延伸段41、51的前端是呈向上彎折狀，藉此能夠更確: 觸該振動片31與壓電片32。 只· 如圖 示，並配合圖4，本發明之壓電式蜂鳴 用於電子收費系統之車上機（0n board unit，〇Bu)的蜂= 規格於該厚度未大於一並且一的電源驅動: 下、4_赫茲(Hz)與5300赫茲兩處的頻率時分別發出 8 200838346 83分貝與82·6分貝（規範值為大於8〇分貝）的音壓〜 合規範所要求的雙嗶聲警示功能。 此付 由於該下殼體22之二圓座222是朝内凸起， 朝外凸起，因此，能夠降低該下殼體22的厚度。同芡 為及弟―、二導電端子4、5的第-、二插桿段41、51 θ ^插於該二圓座222上，而能較為接近該蜂鳴單元3 , 弟一、二延伸段42、52能加大塵觸該振動片31與壓：Zi- /!_ Xlu 另外 another spot weld on the front end of the first one, the extension ends 142, 152. Therefore, the object of the present invention is to provide a method capable of effectively reducing the thickness and improving the contact failure/*, , clothing, and two conductive terminals. . The housing unit has a top buzzer device of the present invention, comprising a buzzer unit, and a first -# _ 卜 成早 7L, 6 200838346 mutual entanglement to define a - resonant cavity - upper housing and a lower case having a base plate and two round seats extending inwardly from the base plate, and each of the round seats is formed with an insertion hole that communicates the resonant cavity with the outside. The buzzing unit is disposed in the resonant cavity and has a vibrating piece, and a piezoelectric piece on the vibrating piece. The first and second conductive terminals are respectively engaged in the opening of the lower casing, and the __ conductive terminal has a first-clip section protruding outward from the base, and the amp is pressed against the vibrating piece. And a second extension terminal having a second rod portion protruding outward from the substrate and a second extension portion pressing the piezoelectric sheet. The effect of the invention is that the two round seats are convex inward, which not only reduces the thickness of the outer casing unit, but also makes the first and second conductive terminals of the first and second conductive terminals closer to the buzzing unit. Therefore, the first and second extensions can reliably press the vibrating piece and the piezoelectric piece to improve the problem of poor contact. The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. As shown in Figures 3 and 4, a preferred embodiment of the piezoelectric buzzer device of the present invention is particularly useful for buzzing 1 § in a vehicle on an electronic toll collection system (ETC), the piezoelectric buzzer The device comprises a housing unit 2, a buzzing unit 3, a first conductive terminal 4, and a second conductive terminal 5. The outer casing unit 2 has an upper casing 21 and a lower casing 22 which are fitted to each other and define a resonant cavity 20. The upper casing 21 has a base wall 211, 7 200838346 and a surrounding wall 212 extending outward from the periphery of the base wall 211 to engage the lower casing 22. A sound hole 213 is formed in the base wall 211. The lower housing 22 has a base plate 221 and a circular seat 222 extending inwardly from the base plate 221. Each of the circular bases 222 defines an insertion hole 223 communicating with the outer cavity and the outer periphery of the resonant cavity. In the preferred embodiment, the upper casing 21 and the lower casing 22 are combined to have a thickness of 6.2 mm. The buzzer unit 3 is disposed in the cavity 2 of the housing unit 2, and has a vibrating piece 31 and a piezoelectric piece 32 adhered to the vibrating piece 31. In the preferred embodiment, the side alloy of the vibration #31 domain nickel is made of a ceramic material, and the dielectric constant is about 4000 °. The first conductive terminals 4, 5 The two holes 223 + are respectively inserted into the lower casing 22 . The first conductive terminal 4 has a first inserting portion 41 which protrudes outwardly from the lower housing 22 and the base plate 221, and a first extension portion & which extends toward the vibrating piece 31 and presses the vibrating piece 31 The second conductive terminal/haves a second plunger segment 51 projecting outwardly from the substrate 221, a second extension 52 extending toward the piezoelectric sheet 32 and pressing against the piezoelectric sheet 32. In the preferred embodiment, the front ends of the first and second extensions 41, 51 of the first and second conductive members 4, 5 are bent upward, thereby making it possible to more accurately: touch the vibrating piece 31 and the pressure Power chip 32. As shown in the figure, and in conjunction with FIG. 4, the piezoelectric buzzer of the present invention is used for a bee of an electronic toll collection system (〇Bu), a power supply having a thickness not greater than one and one. Drive: Under the 4, Hertz (Hz) and 5300 Hz frequencies, respectively, 8 200838346 83 decibels and 82. 6 decibels (standard value is greater than 8 〇 decibels) of the sound pressure ~ double humming required by the specification Warning function. Since the two round seats 222 of the lower casing 22 are convex inward and convex outward, the thickness of the lower casing 22 can be reduced. The same as the younger brother, the second and second pole segments 41, 51 θ ^ of the two conductive terminals 4, 5 are inserted on the two round seats 222, and can be relatively close to the buzzer unit 3, the first one or the second extension The segments 42, 52 can increase the dust contact with the vibrating piece 31 and the pressure:
I 片32的力量，能確實盥該蜂高 ^ 龟 觸不良的_。再者·;Γ 觸抵，能改善接The strength of the I piece 32 can be sure that the bee is high. Furthermore, Γ touch, can improve the connection
t W㈣再者，3亥第一、二延伸段42、52 D 彎折向上的設計，能在成型出該第一、二導電端子4 :王 一同成型’除了可以更加確實觸抵該振動片與壓電片、325時 外，還可以減少製程，節省時間。 之 歸納上述，本發明之壓電式蜂鳴裝置，是利用朝内凸 起的二圓纟222的設計，不但能降低該外殼單元2的严= ，而且’也使得該第-、二導電端子4、5能確實壓觸= 動片31與壓電片32’改善接觸不良的情況，故確 到 本發明之目的。 、 惟以上所述者，僅為本發明之較佳實施例而已， 能以此限定本發明實施之範圍，即大凡依本發明申請： 範圍及發明說明内容所作之簡單的等效變化與” ^ 屬本發明專利涵蓋之範圍内。 Θ 【圖式簡單說明】 圖1是一立體分解圖，說明習知壓電式蜂鳴裝置之態 樣； 9 200838346 圖2是一* 圖 3 是一 較佳實施例； 局#剖面側視圖 立體分解圖，說 ，用以輔助說明圖1 ; 明本發明壓電式蜂鳴裝置之 m部剖面侧視圖，用以辅助說明圖3;及 圖疋曰堡—頻率曲線圖’說明該較 4000赫兹_與5300赫茲兩處頻率所發出的音壓：：：： 合規範所要求的雙，聲警示功能。 匕肖b付t W (4) Furthermore, the 3H first and second extensions 42 and 52 D are designed to be bent upwards, and the first and second conductive terminals 4 can be formed together: the king can be molded together except that the vibrating piece can be more reliably touched. Piezoelectric sheet, 325 hours, can also reduce the process and save time. In summary, the piezoelectric buzzer device of the present invention utilizes the design of the two circular cymbals 222 that are convex toward the inside, which not only reduces the severity of the outer casing unit 2, but also 'also makes the first and second conductive terminals 4, 5 can be reliably pressed = the movable piece 31 and the piezoelectric piece 32' improve the contact failure, so the object of the present invention is achieved. The above is only the preferred embodiment of the present invention, and the scope of the present invention can be limited thereto, that is, the simple equivalent change made by the scope of the invention and the description of the invention and "^ It is within the scope of the patent of the present invention. Θ [Simplified illustration of the drawing] FIG. 1 is an exploded perspective view showing the state of a conventional piezoelectric buzzer device; 9 200838346 FIG. 2 is a diagram of FIG. Embodiments; section #section side view exploded view, to help explain Figure 1; Ming section of the piezoelectric buzzer device m section cross-sectional side view, to help illustrate Figure 3; The frequency graph 'Describes the sound pressure from the two frequencies of 4000 Hz and 5300 Hz:::: The double, sound warning function required by the specification.
10 200838346 【主要元件符號說明】 2 *… ……外设单元 *»¥*****¥ •蜂鳴單元 20… ……共振腔 8振動片 21… ……上殼體 32·…·… •壓電片 211 * ****** *«*«*«*4« *第一導電端子 212 * ……圍燒壁 41…"… •第一插桿段 213 * ……出音孑L 4 2 ******** 〃第一延伸段 22… ……下殼體 **«*«»«** •第二導電端子 221 * ……基盤 1 «*««**** •第二插桿段 222 ^ ……Η座 5 2 **·**♦·* *第二延伸段 223 * ……嵌設孔 1110 200838346 [Description of main component symbols] 2 *... ...... Peripheral unit *»¥*****¥ •Beep unit 20... ......Resonator 8 vibrating piece 21... ...... Upper housing 32·...·... • Piezoelectric piece 211 * ****** *«*«*«*4« *First conductive terminal 212 * ...Bare wall 41..."... •First plunger section 213 * ......孑L 4 2 ******** 〃First extension 22... ...... Lower housing **«*«»«** • Second conductive terminal 221 * ......Base 1 «*««** ** •Second plunger section 222 ^ Η 5 5 2 **·**♦·* *Second extension 223 * ......Insert hole 11