200949882 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種按鍵組件及具該按鍵組件之電子 ’裝置。 【先前技術】 隨著無線通訊與資訊處理技術之發展，行動電話、個 人數位助理（personal digital assistant，PDA)等攜帶型電 子裝置競相湧現’令消費者可隨時隨地充分享受高科技帶 來之種種便利。消費者不再滿足於攜帶型電子裝置具備之 接聽電話、收發資訊等簡單通訊功能’開始對攜帶型電子 裝置之娛樂功能及其他輔助功能提出了更高要求，例如： 他們希望攜帶型電子裝置具備MP3、影音播放、照相等各 種功能。隨著攜帶型電子裝置功能之增多，於攜帶型電子 裝置之按鍵板上或外殼侧壁上就必須增設對應之功能按 鍵，以實現對該攜帶型電子裝置之功能控制。 ❹ 習知功能按鍵大都採用單鍵或雙鍵設計，而隨著攜帶 型電子裝置之功能不斷增多，使得越來越多攜帶型電子裝 置之功能按鍵採用多鍵設計。習知多鍵功能按鍵結構相對 f雜’製造成本比較高；於使用過程中，特別於該多鍵功 能按鍵之中間按鍵被按壓時，與該中間按鍵相鄰之按鍵易 產生聯動現象，從而產生誤操作，影響了攜帶型 之使用性能。 置 【發明内容】 有馨於此，有必要提供一種結構簡單，且可有效防止 6 200949882 使用過程中各相鄰按鍵間產生聯動、誤操作現象之按鍵組 件。 還有必要提供一種具所述按鍵組件之電子裝置。 一種按鍵組件，其包括一按壓面、一與該按壓面相對 之配合面，所述按壓面上間隔地凸設有複數按鍵，該配合 =上設有複數凸柱及複數隔離凸塊；其中，所述複數凸柱 分別對應地凸設於該配合面上與所述按鍵相對位置處，所 ❹述隔離凸塊分別對應地凸設於所述每相鄰二按鍵之間。 一種電子裝置，其包括一按鍵組件及一外殼，該按鍵 組件裝设於外殼上；所述按鍵組件包括一按壓面、一與該 按壓面相對之配合面；所述按壓面上間隔地凸設有複數按 鍵，該配合面上設有複數凸柱及複數隔離凸塊；其中，所 述複數凸柱分別對應地凸設於該配合面上與所述按鍵相 對位置處，所述隔離凸塊分別對應地凸設於所述每相鄰二 按鍵之間。 ❹ 相較於習知技術，所述按鍵組件藉由將複數按鍵一體 設計於一起，從而使得整個按鍵組件之結構變得更加簡單 且容易拆卸。所述按鍵組件藉由於其配合面上對應於按壓 面上之相鄰二按鍵之間隔位置處設置之隔離凸塊，有效實 現了對各相鄰按鍵之間之隔離，從而避免了按壓過程中各 相鄰按鍵之間因產生聯動而弓丨起之誤操作。 【實施方式】 本發明所述之較佳實施例公開了一種攜帶型電子装 置之按鍵組件，其適用於行動電話或個人數位助理 200949882 (personal digital assitant，PDA )、數碼相機等攜帶型電子 裝置。 請參閱圖1及圖3,所述攜帶型電子裝置100包括一 外殼10及一按鍵組件30，所述外殼10包括一侧壁12。 •所述按鍵組件30可拆卸地裝設於所述外殼10之側壁12 上，用以實現對攜帶型電子裝置100内之各功能模組（圖 未示）進行控制。 請一併參閱圖2及圖4，所述外殼10之侧壁12包括 ® 一外表面121。所述外表面121上凹設形成一大致矩形凹 腔狀之裝設部123，以用於裝設所述按鍵組件30。同時， 對應地於所述侧壁12上形成一底壁124及一垂直於底壁 124之側緣126。所述底壁124上間隔地凸設有三個大致 呈矩形塊狀之感應觸墊1241及一大致呈“L”形之卡塊 1243。所述感應觸墊1241與所述攜帶型電子裝置100内 對應之功能模組（圖未示）電性連接，以藉由該感應觸墊 @ 1241發出之電訊號實現對所述功能模組之控制。所述卡 塊1243位於二感應觸墊1241之間。所述底壁124上沿平 行於側緣126方向之兩端部分別貫通開設有一條形開口 1245。所述侧壁12上與所述底壁124相對之另一侧之兩 端對應於所述條形開口 1245位置處分別凸設有一定位柱 125。所述侧緣126上間隔地凹設有二大致矩形之卡持孔 127，於本實施例中，所述二卡持孔127分別設置於所述 側緣126上且位於所述卡塊1243之兩側。 請參閱圖5及圖6,所述按鍵組件30包括一基板31 8 200949882 及一與所述基板31可拆卸地裝設於一起之按鍵板35。所 述基板31大致呈矩形板狀，其採用橡膠材料或其他柔性 材質製成。該基板31包括一第一表面311、一與該第一表 面311相對之第二表面312、一第·—^合端313、一與該 •第一卡合端313相對之第二卡合端314、一第一側部315 及一與該第一侧部315相對之第二侧部317。所述基板31 之第一表面311上間隔地凹設有三沉頭盲孔3112及二矩 形凹槽3115,同時，對應地於所述基板31之第二表面312 ❹上形成三柱形凸起3113及二大致矩形之凸肋3116。其 中，所述二矩形凹槽3115分別對應地凹設於第一表面311 上之相鄰二沉頭盲孔3112之間，且該二矩形凹槽3115間 之間隔距離與所述侧壁12之二卡持孔127間之間隔距離 大致相當。所述第一卡合端313及第二卡合端314分別朝 向第二表面312方向彎折形成大致呈“L”形之一第一卡 合部3131及一第二卡合部3141。所述第一卡合部3131 義及第二卡合部3141朝向第二表面312之一侧分別相鄰凸 ❹ 設有一第一固定塊3132及一第二固定塊3142，該第一固 定塊3132及第二固定塊3142上分別貫通開設有一第一固 定通孔3133及一第二固定通孔3143，以使所述第一固定 塊3132及第二固定塊3142對應地固定套設於所述外殼 10之側壁12之定位柱125上。所述第一側部315朝向第 二表面312方向垂直延伸彎折形成一大致呈“L”形板狀 之彎折部316,該彎折部316先由所述基板31之側部315 朝向第二表面312方向垂直延伸彎折，然後沿平行於基板 9 200949882 31之第二表面312方向且遠離該第一側部315方向延伸 彎折形成。所述彎折部316上貫通開設有一第一矩形缺口 3161，該第一矩形缺口 3161之尺寸大小與所述側壁12上 •之卡塊1243之外形尺寸大小相當，以使所述卡塊1243可 •卡入所述第一矩形缺口 3161並卡持於該基板31上。所述 第二側部317之邊緣對應於所述二矩形凹槽3115位置處 間隔地貫通開設有二第二矩形缺口 3172,該二第二矩形 缺口 3172之間之間隔距離與所述侧壁12之二卡持孔127 ❹之間之間隔距離大致相當。 所述按鍵板35大致呈矩形板狀，其採用塑膠材料製 成。所述按鍵板35包括一按壓面351、一與該按壓面351 相對之配合面352、一第一裝配端353及一與該第一裝配 端353相對之第二裝配端354。所述按壓面351上間隔地 凸設有三按鍵3513，其中，每相鄰二按鍵3513之間形成 一條形凹槽3515。所述配合面352上凹設形成一大致矩 a形之裝設凹槽3521，同時，對應地於該配合面352上形 ❹ 成一第一侧壁355及一與該第一侧壁355相對之第二侧壁 357。所述裝設凹槽3521之尺寸大小與所述基板31之第 一表面311端之外形輪廓大小相當，以用於與基板31相 互裝設於一起。該配合面352之裝設凹槽3521底面上對 應於所述基板31之三沉頭盲孔3112及二矩形凹槽3115 間隔地凸設有三階梯形凸柱3522及二隔離凸塊3525，以 使得當所述按鍵板35裝設於基板31上時，該按鍵板35 之三階梯形凸柱3522及二隔離凸塊3525分別對應地與所 200949882 述基板31上之三沉頭盲孔3112及二矩形凹槽3115相互 卡持於一起。所述按鍵板35之第一裝配端353及第二裝 配端354之配合面352分別凹設有一與裝設凹槽3521相 '互連通之第一矩形凹槽3531及一第二矩形凹槽3541，以 •使得當所述按鍵板35裝設於基板31上時，該基板31之 一第一卡合部3131及一第二卡合部3141分別對應卡合於 所述按鍵板35之第一矩形凹槽3531及一第二矩形凹槽 3541内。所述第一側壁355上朝向該按鍵板35之配合面 ❹ 352端貫通開設有一與所述裝設凹槽3521相互連通之矩 形缺口部3551，同時該矩形缺口部3551之兩侧壁上分別 相對延伸形成一抵持凸塊3552，使得當所述按鍵板35裝 設於基板31上時，該矩形缺口部3551與所述基板31之 彎折部316上之第一矩形缺口 3161相互配合裝設於一 起，同時，該矩形缺口部3551之兩侧壁上之抵持凸塊3552 對應地卡入所述第一矩形缺口 3161並對應卡持於基板31 Λ 上。所述第二侧壁357上間隔地凸設有二卡鉤3572，該 ❹ 二卡鉤3572對應於所述基板31上之二矩形凹槽3115,使 得當所述按鍵板35裝設於基板31上時，該二卡鉤3572 分別穿過所述基板31上之二第二矩形缺口 3172，對應地 卡持於所述侧壁12之二卡持孔127内。 請一併參閱圖2、圖4、圖5及圖6,所述按鍵板35 與所述基板31卡持地裝設於一起。組裝所述按鍵組件30 時，首先將所述基板31之第一表面311端對準所述按鍵 板35之裝設凹槽3521，使所述基板31之第一表面311 11 200949882 端對應地卡合裝設於所述裝設凹槽3521内；該基板31之 彎折部316對應地抵持於所述按鍵板35之第一侧壁355 上，同時，所述按鍵板35之第一側壁355上之矩形缺口 '部3551及其二側壁上之抵持凸塊3552對應地卡入基板 • 31之第一矩形缺口 3161，並對應地卡持於該基板31上。 所述按鍵板35之裝設凹槽3521内之三階梯形凸柱3522 及二隔離凸塊3525分別對應地卡持於基板31之第一表面 311上之三沉頭盲孔3112及二矩形凹槽3115内。所述按 ® 鍵板35之第二側壁357上之二卡鉤3572分別對應地穿過 所述基板31上之二第二矩形缺口 3172，並從該二第二矩 形缺口 3172中伸出。該基板31兩端之第一卡合部3131 及第二卡合部3141分別對應卡合於所述按鍵板35兩端之 第一矩形凹槽3531及第二矩形凹槽3541内，即完成所述 按鍵組件30之組裝。 請一併參閱圖1及圖3，將所述按鍵組件30裝設於 _所述攜帶型電子裝置100之外殼10之側壁12上時，將所 述按鍵組件30之基板31之第二表面312端朝向所述侧壁 12之外表面121上之裝設部123，使所述按鍵組件30之 基板31兩端之第一固定塊3132及第二固定塊3142分別 對應地穿過所述側壁12之底壁124兩端之條形開口 1245，並使該第一固定塊3132上之第一固定通孔3133及 第二固定塊3142上之第二固定通孔3143分別套設於所述 側壁12之定位柱125上。同時，所述按鍵組件30之基板 31之第二表面312上之三柱形凸起3113分別對應地抵持 12 200949882 於所述側壁12之底壁124上之三感應觸墊1241上；所述 基板31之第二表面312上之二凸肋3116對應地抵持於所 述底壁124上。所述側壁12之卡塊1243對應卡合於所述 -按鍵組件30之矩形缺口部3551上，同時，該按鍵組件 • 30之基板31上之二卡鉤3572分別對應地卡持於所述侧 壁12之二卡持孔127内，即完成所述按鍵組件30之安裝 工作。 使用時，按壓所述按鍵組件30之按鍵3513，使得該 ❹按鍵3513推動所述基板31之第二表面312上之柱形凸起 3113移動並按壓所述攜帶型電子裝置100之侧壁12上之 感應觸墊1241，從而產生一電訊號，以控制攜帶型電子 裝置100内對應之各功能模組。 可以理解，所述按鍵組件30之基板31與按鍵板35 也可以採用模内雙射一體成型之方法製成。 可以理解，所述按鍵組件30之按鍵3513之數量並不 & 限於本實施例中所述之三個，其也可以根據實際需要增加 或減少所述按鍵3513之數量。 可以理解，所述基板31之柱形凸起3113及按鍵板35 上之凸柱3522之數量並不限於本實施例中之三個，其數 量對應於所述按鍵組件30之按鍵3513之數量。 所述按鍵組件30包括一基板31及一裝設於基板31 上之按鍵板35，該按鍵組件30藉由將複數按鍵3513 — 體設計於所述按鍵板35上，從而使得整個按鍵組件30之 結構變得更加簡單且容易拆卸。所述按鍵組件30藉由於 13 200949882 其基板31上對應於按鍵板35上之相鄰二按鍵3513之間 隔位置δ又置之凸肋3116，有效實現了對各相鄰按鍵3513 之間之隔離，從而避免了按屋過程中各相鄰按鍵之 間因產生聯動而引起之誤操作。 綜上所述，本發明符合發明專利要件，爰依法提出專 利申請。惟，以上所述者僅為本發明之較佳實施例，本發 明之範圍並不以上述實施例為限，舉凡熟悉本案技藝之人 士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於 以下申請專利範圍内。 ' 【圖式簡單說明】 圖1為本發明較佳實施例按鍵組件裝設於攜帶型電 子裝置外设上之局部立體示意圖； 圖2為圖1所示按鍵組件與攜帶型電子裝置外殼分 時之立體示意圖； ❹ 3為本發明較佳實施例按鍵組件裝設於攜帶型 子裝置外殼上之另一視角下之局部立體示意圖； 圖4為圖3所示按鍵組件與攜帶型電子裝置外殼分離 時之立體示意圖； 圖5為纟發明較佳實施例按鍵組件之立體分解示意 圖 意圖。 6為圖5所示按鍵組件之另 一視角下之立體分解示 【主要元件符號說明】 攜帶型電子裝置 1〇〇外殼 10 200949882 侧壁 裝設部 感應觸墊 條形開口 卡持孔 基板 沉頭盲孔 @ 矩形凹槽 第一卡合端 • 第·—^合部 *第二卡合端 第二卡合部 第一侧部 第一矩形缺口 第二矩形缺口 ❹ 按壓面 條形凹槽 裝設凹槽 隔離凸塊 第一矩形凹槽 第二矩形凹槽 矩形缺口部 第二侧壁 外表面 121 底壁 124 卡塊 1243 侧緣 126 按鍵組件 30 第一表面 311 柱形凸起 3113 第二表面 312 第一卡合部 3131 第一固定通孔 3133 第二卡合部 3141 第二固定通孔 3143 彎折部 316 第二側部 317 按鍵板 35 按鍵 3513 配合面 352 階梯形凸柱 3522 第一裝配端 353 第二裝配端 354 第一侧壁 355 抵持凸塊 3552 卡鉤 3572 15200949882 IX. Description of the Invention: [Technical Field] The present invention relates to a key assembly and an electronic device having the same. [Prior Art] With the development of wireless communication and information processing technology, mobile electronic devices such as mobile phones and personal digital assistants (PDAs) are competing to emerge, so that consumers can fully enjoy the high-tech brought by anytime and anywhere. convenient. Consumers are no longer satisfied with the simple communication functions of the portable electronic device, such as answering calls, sending and receiving information, etc. 'Beginning to put forward higher requirements for the entertainment functions and other auxiliary functions of portable electronic devices, for example: They want portable electronic devices to have MP3, audio and video playback, photography and other functions. As the functions of the portable electronic device increase, a corresponding function button must be added to the keypad of the portable electronic device or the side wall of the housing to implement functional control of the portable electronic device.习 Most of the function buttons are designed with single or double buttons. With the increasing functions of portable electronic devices, more and more portable electronic devices have multi-key design. The conventional multi-key function button structure is relatively high in manufacturing cost; in the process of use, especially when the middle button of the multi-key function button is pressed, the button adjacent to the middle button is liable to cause linkage phenomenon, thereby causing misoperation , affecting the performance of the portable type. [Invention] In this case, it is necessary to provide a button assembly that is simple in structure and can effectively prevent linkage and misoperation between adjacent buttons in the use of 200949882. It is also necessary to provide an electronic device having the key assembly. A button assembly includes a pressing surface and a matching surface opposite to the pressing surface, wherein the pressing surface is convexly provided with a plurality of buttons, wherein the matching has a plurality of protruding columns and a plurality of isolation protrusions; wherein The plurality of protrusions are respectively correspondingly protruded from the mating surface at a position opposite to the button, and the isolation spacers are respectively protruded between the adjacent two buttons. An electronic device includes a button assembly and a housing, the button assembly is mounted on the housing; the button assembly includes a pressing surface, a mating surface opposite the pressing surface; and the pressing surface is spaced apart a plurality of buttons, wherein the plurality of protrusions and the plurality of isolation protrusions are disposed on the mating surface; wherein the plurality of protrusions are respectively correspondingly protruded from the mating surface at a position opposite to the button, wherein the spacers are respectively Correspondingly protruding between each adjacent two buttons.按键 Compared with the prior art, the button assembly is designed to be integrated together by the plurality of buttons, thereby making the structure of the entire button assembly simpler and easier to disassemble. The button assembly effectively isolates the adjacent buttons by virtue of the isolation bumps disposed on the mating surface corresponding to the positions of the adjacent two buttons on the pressing surface, thereby avoiding the pressing process. The misoperation between the adjacent buttons due to the linkage. [Embodiment] The preferred embodiment of the present invention discloses a key assembly of a portable electronic device, which is suitable for a portable electronic device such as a mobile phone or a personal digital assistant 200949882 (personal digital assitant, PDA) or a digital camera. Referring to FIG. 1 and FIG. 3, the portable electronic device 100 includes a housing 10 and a button assembly 30. The housing 10 includes a sidewall 12. The button assembly 30 is detachably mounted on the side wall 12 of the housing 10 for controlling various functional modules (not shown) in the portable electronic device 100. Referring to FIG. 2 and FIG. 4 together, the side wall 12 of the outer casing 10 includes an outer surface 121. The outer surface 121 is recessed to form a substantially rectangular recessed mounting portion 123 for mounting the button assembly 30. At the same time, a bottom wall 124 and a side edge 126 perpendicular to the bottom wall 124 are formed correspondingly on the side wall 12. The bottom wall 124 is laterally convexly provided with three substantially rectangular block-shaped sensing pads 1241 and a substantially "L" shaped card block 1243. The inductive contact pad 1241 is electrically connected to a corresponding functional module (not shown) in the portable electronic device 100, and is implemented by the electrical signal sent by the inductive touch pad @ 1241 to the functional module. control. The card block 1243 is located between the two sensing pads 1241. A strip-shaped opening 1245 is formed in the bottom wall 124 at both ends of the side parallel to the side edge 126. Two ends of the side wall 12 opposite to the bottom wall 124 are respectively provided with a positioning post 125 corresponding to the position of the strip opening 1245. In the embodiment, the two latching holes 127 are respectively disposed on the side edge 126 and located on the card block 1243. On both sides. Referring to FIG. 5 and FIG. 6 , the button assembly 30 includes a substrate 31 8 200949882 and a keypad 35 detachably mounted with the substrate 31 . The substrate 31 has a substantially rectangular plate shape and is made of a rubber material or other flexible material. The substrate 31 includes a first surface 311, a second surface 312 opposite to the first surface 311, a first end 313, and a second engaging end opposite to the first engaging end 313. 314. A first side portion 315 and a second side portion 317 opposite to the first side portion 315. The first surface 311 of the substrate 31 is recessed with three countersink blind holes 3112 and two rectangular recesses 3115, and correspondingly, a three-poster protrusion 3113 is formed on the second surface 312 of the substrate 31. And two substantially rectangular ribs 3116. The two rectangular recesses 3115 are correspondingly recessed between the adjacent two countersunk head blind holes 3112 on the first surface 311, and the distance between the two rectangular recesses 3115 and the sidewall 12 The distance between the two card holding holes 127 is substantially equal. The first engaging end 313 and the second engaging end 314 are respectively bent toward the second surface 312 to form a first engaging portion 3131 and a second engaging portion 3141 which are substantially "L" shaped. The first engaging portion 3131 and the second engaging portion 3141 are respectively adjacent to one side of the second surface 312, and are respectively provided with a first fixing block 3132 and a second fixing block 3142. The first fixing block 3132 And a first fixing through hole 3133 and a second fixing through hole 3143 are respectively defined in the second fixing block 3142, so that the first fixing block 3132 and the second fixing block 3142 are correspondingly fixedly sleeved on the outer casing. 10 is positioned on the positioning post 125 of the side wall 12. The first side portion 315 is bent perpendicularly toward the second surface 312 to form a substantially "L"-shaped plate-shaped bent portion 316. The bent portion 316 is firstly directed by the side portion 315 of the substrate 31. The two surfaces 312 are vertically bent and then bent along a direction parallel to the second surface 312 of the substrate 9 200949882 31 and away from the first side portion 315. A first rectangular notch 3161 is defined in the bending portion 316. The size of the first rectangular notch 3161 is equivalent to the outer shape of the block 1243 of the side wall 12, so that the block 1243 can be • snapping into the first rectangular notch 3161 and holding it on the substrate 31. An edge of the second side portion 317 is spaced apart from the second rectangular recess 3115 by a second rectangular notch 3172. The distance between the second rectangular recess 3172 and the sidewall 12 is The spacing between the two card retaining holes 127 大致 is approximately equal. The key sheet 35 has a substantially rectangular plate shape and is made of a plastic material. The key sheet 35 includes a pressing surface 351, a mating surface 352 opposite to the pressing surface 351, a first mounting end 353, and a second mounting end 354 opposite the first mounting end 353. Three pressing buttons 3513 are formed on the pressing surface 351 at intervals, and a strip-shaped recess 3515 is formed between each adjacent two buttons 3513. The mating surface 352 is recessed to form a substantially rectangular a-shaped mounting recess 3521, and correspondingly formed on the mating surface 352 to form a first sidewall 355 and a first sidewall 355 opposite thereto. Second side wall 357. The mounting recess 3521 has a size corresponding to the outer contour of the first surface 311 of the substrate 31 for being mounted together with the substrate 31. The three countersunk blind holes 3112 and the two rectangular recesses 3115 corresponding to the substrate 31 on the bottom surface of the mounting surface 352 are provided with three stepped protrusions 3522 and two isolation protrusions 3525 so as to be spaced apart. When the key sheet 35 is mounted on the substrate 31, the three stepped protrusions 3522 and the two isolation protrusions 3525 of the key sheet 35 respectively correspond to the three countersunk head blind holes 3112 and two on the substrate 31 of the 200949882 The rectangular grooves 3115 are held together with each other. The first mounting end 353 of the key sheet 35 and the mating surface 352 of the second mounting end 354 are respectively recessed with a first rectangular recess 3531 and a second rectangular recess which are interconnected with the mounting recess 3521. 3541, wherein the first engaging portion 3131 and the second engaging portion 3141 of the substrate 31 are respectively engaged with the key sheet 35 when the key sheet 35 is mounted on the substrate 31. A rectangular recess 3531 and a second rectangular recess 3541 are inside. A rectangular notch portion 3551 communicating with the mounting groove 3521 is formed on the first side wall 355 facing the mating surface 352 of the key sheet 35, and the two side walls of the rectangular notch portion 3551 are respectively opposite to each other. An abutting protrusion 3552 is formed to be coupled to the first rectangular notch 3161 on the bent portion 316 of the substrate 31 when the key sheet 35 is mounted on the substrate 31. At the same time, the abutting protrusions 3552 on the two side walls of the rectangular notch portion 3551 are correspondingly engaged with the first rectangular notch 3161 and are correspondingly held on the substrate 31 。. Two hooks 3572 are respectively protruded from the second side wall 357, and the second hooks 3572 are corresponding to the two rectangular recesses 3115 on the substrate 31, so that when the key sheet 35 is mounted on the substrate 31 The two hooks 3572 are respectively passed through the second rectangular notches 3172 on the substrate 31, and are correspondingly held in the two holding holes 127 of the side walls 12. Referring to FIG. 2, FIG. 4, FIG. 5 and FIG. 6, the key sheet 35 is mounted on the substrate 31 in a latched manner. When the button assembly 30 is assembled, the first surface 311 end of the substrate 31 is first aligned with the mounting groove 3521 of the key sheet 35, so that the first surface 311 11 200949882 end of the substrate 31 is correspondingly carded. The protruding portion 316 of the substrate 31 is correspondingly abutted against the first side wall 355 of the key sheet 35, and the first side wall of the key sheet 35 is simultaneously disposed. The rectangular notch portion 355 on the 355 and the abutting protrusions 3552 on the two side walls thereof are correspondingly engaged with the first rectangular notch 3161 of the substrate 31, and are correspondingly held on the substrate 31. The three stepped protrusions 3522 and the two isolation protrusions 3525 in the recess 3521 of the button plate 35 are respectively correspondingly clamped on the first surface 311 of the substrate 31 by the three countersunk blind holes 3112 and the two rectangular recesses. Inside the slot 3115. The two hooks 3572 on the second side wall 357 of the push button board 35 respectively pass through the second rectangular notches 3172 on the substrate 31 and protrude from the second rectangular notches 3172. The first engaging portion 3131 and the second engaging portion 3141 at the two ends of the substrate 31 respectively correspond to the first rectangular recess 3531 and the second rectangular recess 3541 which are engaged at the two ends of the key sheet 35, that is, the completed The assembly of the button assembly 30 is described. Referring to FIG. 1 and FIG. 3, when the button assembly 30 is mounted on the side wall 12 of the outer casing 10 of the portable electronic device 100, the second surface 312 of the substrate 31 of the button assembly 30 is used. The first fixing block 3132 and the second fixing block 3142 at both ends of the substrate 31 of the button assembly 30 respectively pass through the side wall 12 correspondingly to the mounting portion 123 on the outer surface 121 of the side wall 12 a strip-shaped opening 1245 at the two ends of the bottom wall 124, and the first fixed through-hole 3133 on the first fixing block 3132 and the second fixed through-hole 3143 on the second fixing block 3142 are respectively sleeved on the sidewall 12 Positioned on the column 125. At the same time, the three cylindrical protrusions 3113 on the second surface 312 of the substrate 31 of the button assembly 30 respectively correspondingly resist the 12 sensing pads 1241 on the bottom wall 124 of the side wall 12; Two ribs 3116 on the second surface 312 of the substrate 31 correspondingly abut against the bottom wall 124. The card 1243 of the side wall 12 is correspondingly engaged with the rectangular notch portion 3551 of the button assembly 30, and the two hooks 3572 of the substrate 31 of the button assembly 30 are respectively correspondingly held on the side. The mounting work of the button assembly 30 is completed in the two holding holes 127 of the wall 12. In use, the button 3513 of the button assembly 30 is pressed such that the button 3513 pushes the cylindrical protrusion 3113 on the second surface 312 of the substrate 31 to move and press the sidewall 12 of the portable electronic device 100. The touch pad 1241 is sensed to generate an electrical signal to control the corresponding functional modules in the portable electronic device 100. It can be understood that the substrate 31 and the key sheet 35 of the button assembly 30 can also be formed by in-mold bijection molding. It can be understood that the number of the buttons 3513 of the button assembly 30 is not & limited to three as described in the embodiment, and the number of the buttons 3513 can be increased or decreased according to actual needs. It can be understood that the number of the cylindrical protrusions 3113 of the substrate 31 and the protrusions 3522 on the key sheet 35 is not limited to three in the embodiment, and the number thereof corresponds to the number of the buttons 3513 of the button assembly 30. The button assembly 30 includes a substrate 31 and a keypad 35 mounted on the substrate 31. The button assembly 30 is integrally formed on the keypad 35 by a plurality of buttons 3513, so that the entire button assembly 30 is The structure becomes simpler and easier to disassemble. The button assembly 30 effectively realizes the isolation between the adjacent buttons 3513 by the ribs 3116 of the substrate 31 corresponding to the spacing position δ of the adjacent two buttons 3513 on the keypad 35. Therefore, the erroneous operation caused by the linkage between adjacent buttons in the process of pressing the house is avoided. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial perspective view of a key assembly mounted on a peripheral of a portable electronic device according to a preferred embodiment of the present invention; FIG. 2 is a timing diagram of the key assembly and the portable electronic device housing of FIG. FIG. 4 is a partial perspective view of the key assembly of the preferred embodiment of the present invention mounted on the outer casing of the portable device; FIG. 4 is a perspective view of the key assembly of FIG. 3 is a schematic perspective view of a key assembly of a preferred embodiment of the invention. 6 is a three-dimensional exploded view of the key assembly shown in FIG. 5 [main component symbol description] portable electronic device 1 〇〇 housing 10 200949882 sidewall mounting portion sensing contact strip strip opening card hole countersunk head Blind hole @ Rectangular groove first engaging end • First-splicing part* Second engaging end Second engaging part First side first rectangular notch Second rectangular notch 按压 Pressing noodle-shaped groove to install concave Slot isolation bump first rectangular groove second rectangular groove rectangular notch second side outer surface 121 bottom wall 124 block 1243 side edge 126 button assembly 30 first surface 311 cylindrical protrusion 3113 second surface 312 One engaging portion 3131 first fixed through hole 3133 second engaging portion 3141 second fixed through hole 3143 bent portion 316 second side portion 317 button plate 35 button 3513 mating surface 352 stepped stud 3522 first mounting end 353 Second mounting end 354 first side wall 355 abutting projection 3552 hook 3572 15