201005778 九、發明說明： •【發明所屬之技術領域】 本發明涉及一種電子設備，尤其涉及一種具有按鍵模 組的電子設備。 【先前技術】 業界通過按鍵來控制電子設備啟動、關閉、頻道切換、 ❺音量控制等動作。現有的按鍵通常包括按壓部和自按壓部 相對兩側延伸出的固定臂。電子設備的殼體上開設有通 孔。該按鍵的按壓部設置於通孔内，以便於使用者的按壓。 該固定臂的自由端固定於殼體上，使得按鍵固定於殼體上。 使用時，按壓按壓部，使得電路板上的兩觸點導通， 從而達到控制電子設備的目的；按壓完畢後，按壓部在固 定臂的作用下復位，以便於下一次的按壓。 然而，為了使得按壓部能夠更好的重定，通常需要將 ❹固定臂的長度設置得較長，而固定臂的長度增長會佔用殼 體内的更多空間，不利於電子設備的小型化發展趨勢。 【發明内容】 有鑒於此，有必要提供一種具有減小佔用空間的按鍵 模組的電子設備。 還有必要提供一種便於減小佔用空間的按鍵模組。 一種電子設備，包括殼體、固定於殼體内的電路板以 及按鍵模組，該殼體上開設有通孔，按鍵模組包括用於按 201005778 .壓的按壓件、固定件和彈性件，固定件固定於該通孔内， - 該固定件上開設有滑槽，該按壓件上凸設有滑動地裝配於 ， 滑槽内的滑塊，按壓件在被按壓時與該電路板上的電路接 觸以導通或者斷開電路，彈性件設置於殼體和按壓件之間 用於在按壓件被按壓後回復。 ； 一種按鍵模組，用於觸壓電子設備殼體内電路板上的 電路，該按鍵模組包括用於按壓的按壓件、固定件和彈性 件，該固定件固定該殼體上，該固定件上開設有滑槽，該 按壓件上凸設有滑動地裝配於滑槽内的滑塊，按壓件在被 按壓時觸壓電路板上的電路以導通或者斷開電路板上的電 路，彈性件設置於殼體和按壓件之間用於在按壓件被按壓 後回復。 上述電子設備和按鍵模組通過固定件滑動地裝配按壓 件和彈性件提供按壓件被按壓後回復的作用力，從而不需 要通過設置固定臂來達到重定的效果，減小按鍵模組佔用 ❹的空間，利於電子設備的小型化發展趨勢。 【實施方式】 請參閱如圖1和圖2所示，為一較佳實施方式電子設 備100的分解圖和局部剖面圖。電子設備1〇〇包括殼體 10、固定於殼體10内的電路板20以及在被按壓時用以導 通或者斷開電路板20的按鍵模組3〇。 殼體10開設有一通孔n。殼體1Q包括圍成通孔u 的内表面13。内表面13上設置有兩缺口 15和與兩缺口 15 201005778 •相連通的圓環形凹槽17。缺口 15的延伸方向與圓環形凹 槽17垂直。在其他實施方式中，該凹槽17亦可設置為弧 形。 電路板20上設置有電路（圖未示），其上還設置有與 電路電連接的兩觸點21，該兩觸點21可在該按鍵模組3〇 •被按壓時導通，以連通或者斷開電路板20上的電路。 按鍵模組3〇包括固定於殼體10上的固定件31、滑動 地裝配於固定件31内便於按壓的按壓件33、設置於按壓 件33和忒體1〇之間用於按壓件33在被按壓後回復的彈性 件35以及設置於按壓件33上用於在按壓件33被按壓時連 通兩觸點21的導電片37。 固定件31呈套筒狀，其沿轴向對稱地開設有兩滑槽 311。滑槽311的-端開口且另一端封閉。固定件31的外 表面上還對稱地凸設有兩固定塊313。兩固定塊313的位 置分別與兩缺口 15的位置相對應。固定塊313可從缺口 ❹15滑入到殼體1〇内並隨著固定件31的轉動而進入凹槽17 内並收容於凹槽17内，從而防止固定件31與殼體1〇脫離。 按壓件33滑動地裝配於固定件31内，其包括便於使 用者按壓的鍵帽331和與鍵帽331相連的觸壓部333。鍵 幅331上凸設有與固定件31的兩滑槽311的位置相對的兩 滑塊332，兩滑塊332分別裝配於兩滑槽311内並可相對 於滑槽311在固定件31的軸向方向上滑動。觸壓部 為圓柱體狀。 彈性件35套設於按壓件33的觸壓部333上，且擋設 201005778 •於鍵帽331和殼體10之間，用以提供按壓件％被按壓後 - 回復的作用力。在本實施方式中，彈性件35為一螺旋形的 _ 彈片’在其他實施方式中’彈性件35可為一彈簧。 導電件37固定於觸壓部333上遠離鍵帽331的末端， 以便於在該按壓件33在被按壓後連通電路板2〇上的兩觸 點21。在本實施方式中，按鍵模組3〇通過導電件連通 電路板20上的兩觸點21，在其他實施方式中，按鍵模組 30可通過在觸壓部333上設置導電膠，採用導電膠來連通 電路板20上的兩觸點21。 通過固定件31滑動地裝配按壓件33和彈性件35提 供按壓件33被按壓後回復的作用力，從而使得按壓件33 在被按壓時能夠使得導電片37連通兩觸點21，並在按壓 後在彈性件35的作用下復位，從而完成按壓的功能。上述 的案件模組不需要通過設置固定臂來達到更好的復位的效 果’從而減小按鍵模組30佔用的空間，利於電子設備1〇〇 ❿的小型化發展趨勢。 【圖式簡單說明】 圖1為一較佳實施方式電子設備的分解圖。 圖2為圖1中電子設備的局部剖面圖。 殼體 内表面 10 【主要元件符號說明】 電子設備 1〇〇 塌·孔* 11 13 201005778 缺口 15 凹槽 17 電路板 20 觸點 21 按鍵模組 30 固定件 31 滑槽 311 固定塊 313 按壓件 33 鍵帽 331 滑塊 332 觸壓部 333 彈性件 35 導電件 37 Φ 參 10201005778 IX. Description of the invention: • Technical field to which the invention pertains The present invention relates to an electronic device, and more particularly to an electronic device having a button module. [Prior Art] The industry controls the start, shutdown, channel switching, and volume control of electronic devices through buttons. Existing buttons typically include a pressing portion and a fixed arm extending from opposite sides of the pressing portion. A through hole is formed in the housing of the electronic device. The pressing portion of the button is disposed in the through hole to facilitate pressing by the user. The free end of the fixed arm is fixed to the housing such that the button is fixed to the housing. In use, the pressing portion is pressed, so that the two contacts on the circuit board are turned on, thereby achieving the purpose of controlling the electronic device; after the pressing is completed, the pressing portion is reset by the fixing arm to facilitate the next pressing. However, in order to make the pressing portion better reposition, it is generally required to set the length of the crucible fixing arm to be long, and the length of the fixing arm increases to occupy more space in the housing, which is disadvantageous for the miniaturization trend of electronic equipment. . SUMMARY OF THE INVENTION In view of the above, it is necessary to provide an electronic device having a button module that reduces space. It is also necessary to provide a button module that facilitates reducing the footprint. An electronic device includes a housing, a circuit board fixed in the housing, and a button module, wherein the housing is provided with a through hole, and the button module includes a pressing member, a fixing member and an elastic member for pressing according to 201005778. The fixing member is fixed in the through hole, the sliding member is provided with a sliding slot, and the sliding member is convexly disposed on the slider in the sliding slot, and the pressing member is pressed and on the circuit board The circuit contacts to turn on or off the circuit, and the elastic member is disposed between the housing and the pressing member for returning after the pressing member is pressed. a button module for pressing a circuit on a circuit board in an electronic device housing, the button module comprising a pressing member for pressing, a fixing member and an elastic member, the fixing member fixing the housing, the fixing The sliding member is provided with a sliding slot, and the sliding member is convexly disposed on the slider, and the pressing member touches the circuit on the circuit board to turn on or off the circuit on the circuit board when pressed. The elastic member is disposed between the housing and the pressing member for returning after the pressing member is pressed. The electronic device and the button module are slidably assembled with the pressing member and the elastic member by the fixing member to provide a pressing force for the pressing member to be pressed after being pressed, thereby eliminating the need to set the fixing arm to achieve the re-setting effect, and reducing the occupation of the button module. Space is conducive to the trend of miniaturization of electronic devices. [Embodiment] Please refer to FIG. 1 and FIG. 2 for an exploded view and a partial cross-sectional view of an electronic device 100 according to a preferred embodiment. The electronic device 1A includes a housing 10, a circuit board 20 fixed in the housing 10, and a button module 3A for turning on or off the circuit board 20 when pressed. The housing 10 defines a through hole n. The housing 1Q includes an inner surface 13 that surrounds the through hole u. The inner surface 13 is provided with two notches 15 and an annular groove 17 communicating with the two notches 15 201005778. The direction in which the notch 15 extends is perpendicular to the annular groove 17. In other embodiments, the recess 17 can also be arranged in an arc shape. The circuit board 20 is provided with a circuit (not shown), and is further provided with two contacts 21 electrically connected to the circuit, and the two contacts 21 can be turned on when the button module 3 is pressed to connect or The circuit on circuit board 20 is broken. The button module 3 includes a fixing member 31 fixed to the casing 10, a pressing member 33 slidably fitted in the fixing member 31 for pressing, and a pressing member 33 disposed between the pressing member 33 and the body 1 用于 for the pressing member 33 at The elastic member 35 that is returned after being pressed and the conductive piece 37 that is provided on the pressing member 33 for communicating the two contacts 21 when the pressing member 33 is pressed. The fixing member 31 has a sleeve shape, and two sliding grooves 311 are symmetrically opened in the axial direction. The end of the chute 311 is open and the other end is closed. Two fixing blocks 313 are symmetrically protruded on the outer surface of the fixing member 31. The positions of the two fixing blocks 313 correspond to the positions of the two notches 15, respectively. The fixing block 313 is slidable from the notch ❹ 15 into the casing 1 and enters the recess 17 as the fixing member 31 rotates and is received in the recess 17, thereby preventing the fixing member 31 from being detached from the housing 1〇. The pressing member 33 is slidably fitted in the fixing member 31, and includes a key cap 331 which is easy for the user to press and a contact portion 333 which is connected to the key cap 331. The slider 331 is convexly disposed with two sliders 332 opposite to the positions of the two sliding slots 311 of the fixing member 31. The two sliders 332 are respectively fitted into the two sliding slots 311 and can be opposite to the sliding slot 311 at the axis of the fixing member 31. Slide in the direction. The contact portion is cylindrical. The elastic member 35 is sleeved on the pressing portion 333 of the pressing member 33, and is disposed between the keycap 331 and the housing 10 to provide a force for the pressing member to be pressed-recovered. In the present embodiment, the elastic member 35 is a spiral _ spring piece. In other embodiments, the elastic member 35 may be a spring. The conductive member 37 is fixed to the end of the contact portion 333 away from the key cap 331 to facilitate the contact of the two contacts 21 on the circuit board 2 after the pressing member 33 is pressed. In the embodiment, the button module 3 is connected to the two contacts 21 on the circuit board 20 through the conductive member. In other embodiments, the button module 30 can be provided with a conductive adhesive on the contact portion 333, and the conductive adhesive is used. To connect the two contacts 21 on the circuit board 20. The sliding member 33 and the elastic member 35 are slidably fitted by the fixing member 31 to provide a force for returning the pressing member 33 after being pressed, so that the pressing member 33 can cause the conductive sheet 37 to communicate with the two contacts 21 when pressed, and after pressing It is reset by the action of the elastic member 35, thereby completing the function of pressing. The above-mentioned case module does not need to set a fixed arm to achieve a better reset effect, thereby reducing the space occupied by the button module 30, which is advantageous for the miniaturization trend of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded view of a preferred embodiment of an electronic device. 2 is a partial cross-sectional view of the electronic device of FIG. 1. Inner surface of the housing 10 [Description of main components] Electronic equipment 1 Collapse·Hole* 11 13 201005778 Notch 15 Groove 17 Circuit board 20 Contact 21 Key module 30 Fixing member 31 Chute 311 Fixing block 313 Pressing member 33 Key cap 331 slider 332 contact portion 333 elastic member 35 conductive member 37 Φ