201240489 六、發明說明： 【發明所屬之技術領域】 本發明係有關於一種電子裝置，特別係有關於一種具 有靜電式揚聲器之電子裝置。 【先前技術】 首先請參閱第1圖，由於傳統的智慧型手機（Smart phone)或平板電腦（Tablet PC)等可攜式電子裝置正面通常 設有大面積的顯示螢幕，因此在電子裝置背面的殼體上通 常設有若干開孔，藉以使電子裝置内部的揚聲器可透過前 述開孔而將聲波傳送到外界（如第1圖中箭頭方向所示）。 然而，有鑑於一般使用者在操作電子裝置時皆是朝向電子 裝置的顯示螢幕（亦即位在電子裝置的正面），因此對於使 用者而言往往無法清楚地聽到揚聲器所發出的聲音。 有鑑於此，如何改善習知電子裝置的結構設計，藉以 使揚聲器的聲音可有效傳送到電子裝置的正面始成為一重 要之課題。 【發明内容】 本發明之一實施例提供一種電子裝置，包括一本體、 一背蓋以及一靜電式揚聲器，前述本體具有一顯示面，前 述背蓋連接本體並且設有至少一開孔，其中本體與背蓋之 間形成有一中空腔體，前述中空腔體由本體之一側邊延伸 至前述顯示面。前述靜電式揚聲器設置於中空腔體内，其 中靜電式揚聲器所產生之聲波訊號透過前述開孔穿出電子 裝置，同時經由前述中空腔體而傳遞至顯示面。 於一實施例中，前述中空腔體末端形成有一開口，且 HTC099259/0746-A42784 TW/Final 201240489 靜電式揚聲器所發出的聲波可經由前述開口輸出。 於一實施例中，前述電子裝置更包括一網狀構件，其 中開口被前述網狀構件所覆蓋。 於一實施例中，前述網狀構件與顯示面相互鄰接。 於一實施例中，前述網狀構件位於電子裝置的邊緣。 於一實施例中，前述中空腔體大致呈L形。 於一實施例中，前述靜電式揚聲器貼附於背蓋之一内 側表面。 於一實施例中，前述開孔設置於背蓋之一主表面上， 且前述主表面大致平行於本體之顯示面。 於一實施例中，前述開孔設置於背蓋之一側表面上， 且前述側表面大致垂直於本體之顯示面。 於一實施例中，前述電子裝置為一智慧型手機或平板 電腦。 為使本發明之上述目的、特徵、和優點能更明顯易懂， 下文特舉較佳實施例並配合所附圖式做詳細說明。 【實施方式】 請一併參閱第2、3圖，本發明一實施例之電子裝置100 例如為一智慧型手機或平板電腦，其主要包括一本體10、 一背蓋20以及至少一靜電式揚聲器（Electrostatic Loudspeaker, ESL)30，前述本體10例如可含有電路系統、 處理單元以及顯示模組等元件，背蓋20與本體10相互結 合，靜電式揚聲器30則是設置在本體10與背蓋20之間。 如第2、3圖所示，背蓋20上設有複數個開孔21，靜電式 揚聲器30發出的聲音可經由開孔21穿出電子裝置100。 HTC099259/0746-A42784 TW/Final 4 201240489 為特別說明的是，靜電式 的薄型揚聲哭,孝。。30疋一種可雙向笋簦 置⑽的正面發聲。接著Η時也可朝向電子裝 100的本體10盥 ^ 3 ® ’當前述電子裝置201240489 VI. Description of the Invention: [Technical Field] The present invention relates to an electronic device, and more particularly to an electronic device having an electrostatic speaker. [Prior Art] First, please refer to FIG. 1 , because the front surface of the portable electronic device such as a smart phone or a tablet PC usually has a large display screen on the back of the electronic device. The housing is usually provided with a plurality of openings, so that the speakers inside the electronic device can transmit the sound waves to the outside through the aforementioned openings (as indicated by the direction of the arrow in FIG. 1). However, in view of the fact that a general user operates the electronic device to face the display screen of the electronic device (i.e., on the front side of the electronic device), the sound emitted by the speaker is often unclear to the user. In view of this, how to improve the structural design of the conventional electronic device, so that the sound of the speaker can be effectively transmitted to the front surface of the electronic device becomes an important issue. An embodiment of the present invention provides an electronic device including a body, a back cover, and an electrostatic speaker. The body has a display surface, and the back cover connects the body and is provided with at least one opening, wherein the body A hollow cavity is formed between the back cover and the hollow cavity, and the hollow cavity extends from one side of the body to the display surface. The electrostatic speaker is disposed in the hollow cavity, and the acoustic wave signal generated by the electrostatic speaker passes through the opening and exits the electronic device, and is transmitted to the display surface via the hollow cavity. In one embodiment, an opening is formed at the end of the hollow cavity, and sound waves emitted by the HTC099259/0746-A42784 TW/Final 201240489 electrostatic speaker can be output through the aforementioned opening. In one embodiment, the electronic device further includes a mesh member, wherein the opening is covered by the mesh member. In an embodiment, the mesh member and the display surface are adjacent to each other. In an embodiment, the mesh member is located at an edge of the electronic device. In an embodiment, the hollow body is substantially L-shaped. In one embodiment, the electrostatic speaker is attached to an inner side surface of one of the back covers. In an embodiment, the opening is disposed on one main surface of the back cover, and the main surface is substantially parallel to the display surface of the body. In one embodiment, the opening is disposed on one side surface of the back cover, and the side surface is substantially perpendicular to the display surface of the body. In one embodiment, the electronic device is a smart phone or a tablet. The above described objects, features, and advantages of the present invention will be more apparent from the description of the preferred embodiments. The electronic device 100 of the embodiment of the present invention is a smart phone or a tablet computer, which mainly includes a body 10, a back cover 20 and at least one electrostatic speaker. (Electrostatic Loudspeaker, ESL) 30, the body 10 may include components such as a circuit system, a processing unit, and a display module. The back cover 20 and the body 10 are coupled to each other, and the electrostatic speaker 30 is disposed on the body 10 and the back cover 20. between. As shown in Figs. 2 and 3, the back cover 20 is provided with a plurality of openings 21 through which the sound emitted from the electrostatic speaker 30 can pass through the electronic device 100. HTC099259/0746-A42784 TW/Final 4 201240489 It is specially stated that the electrostatic type is thin and crying, filial piety. . 30疋 A frontal sounding of a two-way bamboo shooter (10). Then, the cymbal can also face the body 10 of the electronic device 100 盥 ^ 3 ® ’ when the aforementioned electronic device
形的中空腔體S、，H：：巧，會在兩者之間形成-個L 至本體s 係由本體10之-側延伸 則万的顯不面10】，i中篠 τ 於中空腔體s /^，if ~ΓΗμ 電式钴聲态30容置 靜電式揚=1 #於背蓋2G的内側表面上，·由於 好電式知h3G具有雙向發聲之特性 由次 電式揚聲30所發出的聲音外，靜 的引導而傳遞也會經由前述中空腔體$ A方向所示）。 U的顯不面1〇1(如第3圖中箭頭 此外’由第3圖可以臺屮义 體10和背”〇J门t j迭中空腔體S係形成在本 開口，靜聲二時中空腔體8的末端處形成有一 子裝置100的-方：山所發出的聲波可經由前述開口朝電 4置1⑽的則方輸出；第 狀構件M戶斤覆蓋，葬…？中之開口係被-透氣之網 ι〇π 9 °避免外物或灰塵進入電子裝置 1 〇〇内部。再請參閱筮4 r 梦署1_,真1 别述網狀構件％係位於電子 褒置10 0的邊緣’其中铜此接 相万都姑、 構件M與本體10的顯示面10】 相互鄰接，耩此可將靜雷 電子裝置1GG的正面，以提°所發出的聲波傳導至 如前所述，本發明夢時的聽覺感受。 子襄置100的背蓋20上設 電二詈1〇〇的：/吏靜電式揚聲器30所發出的聲音經由 的月側傳出’同時也能透過位在本體10與背 HTC099259/0746-A42784—TW/Fina| ’、 € 5 201240489 蓋20之間的中空腔體S，藉以將靜電式揚聲器30所發出 的聲波傳遞到電子裝置100的正面（顯示面101);如此一 來，無論使用者在電子裝置的正面或背面皆可清楚地聽到 靜電式揚聲器30所發出的聲音。 應了解的是，前述開孔21不僅可設置於背蓋20的主 表面201(如第3圖所示），亦可將開孔21設置在背蓋20的 側表面202上，藉此可使聲波由電子裝置100的側面發出， 以擴大聲波的輻射範圍，其中背蓋20的主表面201大致平 行於本體10的顯示面101，而背蓋20的側表面202則大 致垂直於本體10的顯示面101。 綜上所述，本發明提供一種電子裝置，其主要包含一 本體、一背蓋以及至少一靜電式揚聲器，前述本體與背蓋 之間形成有一個L形的中空腔體，靜電式揚聲器則容置於 中空腔體内。特別地是，靜電式揚聲器所發出的聲音不僅 能從背蓋上的開孔傳出，同時亦可經由中空腔體而傳遞至 電子裝置的正面，藉此能大幅提升使用者在聽覺感受上的 舒適度。 雖然本發明以前述之實施例揭露如上，然其並非用以 限定本發明。本發明所屬技術領域中具有通常知識者，在 不脫離本發明之精神和範圍内，當可做些許之更動與潤 飾。因此本發明之保護範圍當視後附之申請專利範圍所界 定者為準。 【圖式簡單說明】 第1圖表示一習知可攜式電子裝置之示意圖； 第2圖表示本發明一實施例之電子裝置爆炸圖； HTC099259/0746-A42784 TW/Final 6 201240489 第3圖表示第2圖中之電子裝置於組裝後的局部剖視 圖，以及 第4圖表示第2圖中之電子裝置於組裝後的示意圖。 【主要元件符號說明】 本體10 背蓋20 開孔21The shape of the hollow cavity S,, H::, will form between the two - L to the body s is extended from the side of the body 10, then the tens of thousands of faces 10, i 筱τ in the hollow cavity Body s / ^, if ~ ΓΗμ Electric cobalt sound state 30 accommodates electrostatic type Yang = 1 # on the inside surface of the back cover 2G, · Because of the good electric knowledge, h3G has the characteristics of two-way sounding by the secondary electric sound 30 In addition to the emitted sound, the static guidance is transmitted through the aforementioned hollow body $A direction). The display of U is not the same as 1〇1 (as in the arrow in Fig. 3, 'the 3rd figure can be used for the platform 10 and the back'. The J-door tj is formed in the opening, and the quiet sound is hollow. At the end of the cavity 8, a sub-device 100 is formed. The sound waves emitted by the mountain can be output through the opening to the electric 4 (1); the first member M is covered, and the opening in the funnel is - Breathable mesh ι〇π 9 ° Avoid foreign objects or dust entering the inside of the electronic device 1 再. Please refer to 筮 4 r 梦 署 1_, 真1 别 网 网 网 网 网 % % % % % % % % % % % % Wherein, the copper contact portion, the member M and the display surface 10 of the body 10 are adjacent to each other, so that the sound wave emitted by the front surface of the static lightning electronic device 1GG can be transmitted to the foregoing as described above. The auditory feeling of dreams. The back cover 20 of the sub-station 100 is provided with a second 詈1〇〇: / 吏 The sound emitted by the electrostatic speaker 30 is transmitted through the moon side', and can also pass through the body 10 Back HTC099259/0746-A42784-TW/Fina| ', € 5 201240489 Cover the hollow cavity S between the 20, so that the electrostatic speaker The sound waves emitted by 30 are transmitted to the front surface (display surface 101) of the electronic device 100; thus, the sound emitted by the electrostatic speaker 30 can be clearly heard by the user on the front or back of the electronic device. The opening 21 can be disposed not only on the main surface 201 of the back cover 20 (as shown in FIG. 3), but also on the side surface 202 of the back cover 20, thereby enabling sound waves to be used by the electronic device. The side of the 100 is emitted to expand the radiation range of the acoustic wave, wherein the major surface 201 of the back cover 20 is substantially parallel to the display surface 101 of the body 10, and the side surface 202 of the back cover 20 is substantially perpendicular to the display surface 101 of the body 10. As described above, the present invention provides an electronic device, which mainly includes a body, a back cover, and at least one electrostatic speaker. An L-shaped hollow cavity body is formed between the body and the back cover, and the electrostatic speaker is accommodated. In the hollow cavity, in particular, the sound emitted by the electrostatic speaker can be transmitted not only from the opening in the back cover, but also to the front side of the electronic device via the hollow cavity, thereby greatly increasing The user's comfort in the sense of hearing. Although the invention is disclosed above in the foregoing embodiments, it is not intended to limit the invention. Those skilled in the art to which the invention pertains, without departing from the spirit and scope of the invention The scope of protection of the present invention is defined by the scope of the appended claims. [FIG. 1 shows a conventional portable electronic device. FIG. 2 is an exploded view of an electronic device according to an embodiment of the present invention; HTC099259/0746-A42784 TW/Final 6 201240489 FIG. 3 is a partial cross-sectional view showing the electronic device in FIG. 2 after assembly, and FIG. 4 is a view Figure 2 is a schematic view of the electronic device after assembly. [Main component symbol description] Body 10 Back cover 20 Opening 21
靜電式揚聲器30 電子裝置100 顯示面101 主表面201 側表面202 網狀構件Μ 中空腔體S HTC099259/0746-A42784 TW/Final 7Electrostatic speaker 30 Electronic device 100 Display surface 101 Main surface 201 Side surface 202 Mesh member Μ Medium hollow body S HTC099259/0746-A42784 TW/Final 7