M406211 五、新型說明： 【新型所屬之技術領域】 鍵盤組合’尤指—種邊緣具有固 本創作關於一種軟性保護蓋及其 定結構之軟性保護蓋及其鍵盤組合。 【先前技術】 就目前個人電腦的使用習慣而言，鍵盤為不可或缺的輸入設備之 用以輸入文子、符號或數字。為防止異物(例如水、灰塵等）自 鍵帽間的間隙進人㈣⑽’進而造成鍵盤的損壞，先前技術是將 ♦人卜主保4蓋復蓋〜鍵i’目之上方，籍由軟性保護蓋遮蓋每兩個键帽 之間的間隙’以防止異物經由鍵帽的間隙進入鍵盤内部。 π白知的权性保護蓋通常不具有固定結構以固定鍵盤與軟性 保·^之相對位置’且習知的軟性保護蓋之邊緣與鍵盤之間依舊存 有Η隙使灰塵等異物可經由此邊緣之間隙進入鍵盤内部而降低軟 性保護蓋防塵的功效。除此之外，放置於鍵盤周圍之液體(例如水戒 咖非專)亦可自此邊緣之間隙進入鍵盤内部而損壞鍵盤。 【新型内容】 因此’本創作的目的之一在於提供一種邊緣具有固定結構之軟性 保護蓋及其鍵盤組合，以解決上述之問題。 M406211 本創作係提供—種軟性保護蓋，用來覆蓋於輸入裝置上。輸入裝 置具有複數個按鍵，且輸人裝置之側邊延伸形成有至少—突出卡合 、'.«構权11保4蓋包含片狀主體以及複數個中空突出結構。片狀主 體之側邊對應突出卡合結構之位置具有固定孔結構，且複數個中空 突出結構分卿成於^{狀主體對應複數個按鍵之位置上。當突出卡 合結構穿設於’孔結構上時，突出卡合結構之端部下翻定孔結 構’藉以使每-中空突出結構緊密覆蓋於相對應之按鍵上。 本創作另提供-種鍵盤組合，其包含鍵盤以及軟性保護蓋。鍵盤 包含底板以及複數個按鍵，底板之側奴置有至少—突出卡合結 構。且複數個按鍵分別設置於底板上。每一按鍵包含鍵帽以及升降 支撐裝置’升降支«置設置於底板與鍵帽之間，鍵帽藉由升降支 樓裝置可相對於底板做上下運動。軟性保護蓋的結構設計係如上所 述。 本創作另提供-種軟性保護蓋，絲覆蓋於輸人裝置上。輸入裝 置具有複數個按鍵，軟性保護蓋包含片狀主體、複數個中空突出結 構以及卡合板。片狀主體之側邊具有至少—固定孔結構，且複數個 中空突出結構形成於片狀主體對應複數個按鍵之位置上。卡合板之 側邊對應m定孔結構之位置上延伸形成有—突出卡合結構，當片狀 主體與卡合板制包覆輸人数且突出卡合結構穿設於固定孔結構 上時，突出卡合結構之端部下壓固定孔結構，藉以使每一中空突出 結構緊密覆蓋於相對應之按鍵上。 5 M06211 綜上所述，本創作利用形成於輸入裝置(例如鍵盤)側邊之突出卡 合結構以及軸於紐賴蓋之片狀主體側叙固定孔結構， 出卡合結構之端部於突出卡合結構穿狀岐孔結構上時下盤 =結構’藉以使每-中空突出結構緊密覆蓋於相對應之按鍵:，且 讀軟性髓蓋之邊緣與輸人数之__，輯敝止異物 入,緣之間隙的功效。此外，本創作亦可額外增設側邊延伸形成 ^出卡σ、、°構之卡合板，藉由卡合板之突出卡合結構與軟性保護 蓋之片狀主體側邊之峡孔結構間的配合’使每—中空突出結構緊 =覆盘於相對應之按鍵上，且使片狀主體與卡合板共同包覆輸入敦 置以達到阻止兵物進入輪入裝置内部之功效。 、 曰關於本創作之優點與精神可以藉由以下的創作詳述及所附圖式 ;h"到進一步的瞭解。 · 【實施方式】 睛參閱第1圖以及第2圖，第1圖為根據本創作一較佳實施例之 鍵盤組合1之組合圖，帛2圖為第1圖之鍵盤組合〗之爆炸圖。如 第1圖與第2圖所示，鍵盤組合1包含鍵盤3以及軟性保護蓋5， 且鍵盤3包含底板7以及複數個按鍵9。按鍵9設置於底板7上， 且軟性保護蓋5覆蓋於鍵盤3上。值得—提的是，本創作之軟性保 。蔓蓋5亦可應用於一般具有按鍵以及底板之輸入裝置(例如計算機） 上，用以防止異物進入一般具有按鍵以及底板之輸入裴置之按鍵間 M406211 • 的間隙。為求簡化，以下輸入裝置係以鍵盤為例，至於應用於—般 具有按鍵以及底板之輸入裝置之軟性保護蓋，係可以此類推，故其 結構設計於此不再贅述。 睛參閱第3圖，第3圖為第1圖中之鍵盤組合！沿線之刟 面圖。如第3圖所示，鍵盤3更包含電路板n，設置於底板7上。 • 此外’每一按鍵9包含升降支撐裴置13、彈性件15以及鍵帽n。 φ 升降支撐裝置13設置於底板7與鍵帽17之間。進一步地’鍵帽17 具有第-滑槽19以及第-卡槽21，且底板7具有第二滑槽23以及 第二卡槽25。升降支撐裝置！3包含第一支撐件π α及第二支撐件 29 ’其中第二支禮件29與第—切件27樞接。第—讀件27具有 第-滑動部31以及第-樞接部33。於組裝第—支撐件27時，第一 滑動部3!可滑動地設置於第一滑槽19中，且第一枢接部33可轉動 地樞接於第二卡槽25中。第二支榜件29具有第二滑動部^以及第 二樞接部37。於組裝第二支#件29時，第二滑動部％可滑動地設 .置於第二滑槽23中’且$二樞接❹可轉動地雛於第—卡槽η 此來，透過上述之結構連接設計，鍵帽17係可藉由升降支 撐裝置13而相對於底板7做上下運動。 另二彈性件15亦設置於鍵帽17與底板7之間，以作為鍵帽 相對底板7上下運動時所需师力來源，其中，彈性件丨5可較 =橡=(秦―，但不以此為限。此外，電路板u上 ”女’· 9對應的開關(未顯示），例如薄膜開關㈣池職撕純) 7 M406211 或其乞觸發性開關。當按鍵9之鍵帽17被按壓時，彈性件ι5會觸 發電路板11上的開關，進而執行使用者所欲輸入的功能。 如第2圖與第3圖所示，底板7之側邊延伸形成有至少—突出卡 合結構41(於第3圖中顯示一個）’軟性保護蓋5包含片狀主體们以 及複數個中空突出結構45 ’其中，每-中空突出結構45具有容置 空間46。中空突出結構45形成於片狀主體43對應複數個按鍵9之 位置上，換句話說，每-中空突出結構45之容置空間46係對應複 數個按鍵9的其中之一因此，當軟性保護蓋5覆蓋於鍵盤3上時， 每一按鍵9便可分別容置於對應的中空突出結構幻之容置空間46 屮。進一步地，片狀主链43之倒邊對應突w合結構4丨之位置具 有固定孔結構47。於此實施例中’突出卡合結構4H系較佳地為z、 字型結構’且片狀主體43與中空突出結構45係較佳地由橡膠材質 所組成。由於橡膠材質具有彈性’故形成於片魅體43之固定孔結 構47可被拉伸而彈性地放大或縮小，且橡膠材質亦可提供使用者於 使用鍵盤3時較佳之觸感。 料對祕賴蓋π” _ —錢仃聊說明。首 人性保護蓋5之固定孔結構47，賤鍵盤3之突出卡合結相 =麵定狀構47。在突出卡合雜4ι?娜定孔結構们 大出卡合結構41之端部即位於固定孔結構47 術_定㈣47。_，㈣树咖護= 3。此時，軟性保如之每-㈣出結構45分別容置鍵盤 M4Ub211 ，按鍵9—’且緊密覆蓋於相對應之按鍵9上。進一步地，軟性保護蓋5 便可藉由固定孔結構47與鍵盤3之突出卡合結構心配合，密封軟 性保護蓋5之邊緣與鍵盤3之間的間隙，以達到阻止異物進入此邊 緣之間隙的功效。 接著。月併參閱第3圖以及第4圖，第4圖為第}圖所示之軟 .性保護蓋5於另—視角之立體圖。如第3圖與第4圖所示，為加強 •使每一中空突出結構45可緊密覆蓋於相對應之按鍵9，上述之片狀 ^體43另具有至少—固定柱49’每—固定柱形成於相鄰兩中空 大出二構45之間的位置上。固定柱49係用來穿設於底板7上之孔 j 4以加強固定狀主體43與底板7之相對位置。至於如何決定 2固疋柱49於片狀主體a上的位置，端視實際應用中軟性保護 蓋5以及底板7的固定需求而定。 於實_財，每-中空突出結構45之頂面上可具有按鍵圖樣 擊48 ’以相對應地顯示被其覆蓋之按鍵9的圖樣。如此一來，使用者 即可根據按鍵_ 48操作_ 3，峰行其所輯人的功能。按鍵 圖樣48可以網版印刷或雷射雕刻方式形成於中空突出結構μ上。 至於網版印刷或雷射雕刻，其係常見於習知技術中，故於此不再贅 述除此之外每按鍵圖樣仙上可喷附有一聚胺基甲酸酿(啊M406211 V. New description: [New technical field] Keyboard combination ‘In particular, the edge has a solid protective cover and a keyboard combination for a soft protective cover and its structure. [Prior Art] As far as the current usage habits of personal computers are concerned, the keyboard is an indispensable input device for inputting texts, symbols or numbers. In order to prevent foreign matter (such as water, dust, etc.) from entering the gap between the keycaps (4) (10)' and thus causing damage to the keyboard, the prior art is to cover the ♦ person's main cover 4 cover ~ key i' above the head, by soft The protective cover covers the gap between each of the two keycaps to prevent foreign matter from entering the inside of the keyboard via the gap of the keycap. π 白知's weight protection cover usually does not have a fixed structure to fix the relative position of the keyboard and the soft protection ^ and the gap between the edge of the conventional soft protection cover and the keyboard still allows the foreign matter such as dust to pass through The gap between the edges enters the inside of the keyboard to reduce the dustproof effect of the soft protective cover. In addition, liquids placed around the keyboard (such as water and coffee) can also enter the inside of the keyboard from the edge of the keyboard and damage the keyboard. [New content] Therefore, one of the purposes of the present invention is to provide a soft protective cover having a fixed structure on the edge and a keyboard combination thereof to solve the above problems. M406211 This creation provides a soft protective cover for covering the input device. The input device has a plurality of buttons, and the side of the input device is extended to form at least a protruding engagement, and the '.« constituting 11 cover 4 includes a sheet-like body and a plurality of hollow protruding structures. The side of the sheet-like main body has a fixed hole structure corresponding to the position of the protruding engaging structure, and the plurality of hollow protruding structures are divided into positions corresponding to the plurality of buttons. When the protruding engaging structure is disposed on the 'hole structure, the end portion of the protruding engaging structure is folded over the hole structure' so that each of the hollow protruding structures closely covers the corresponding button. This creation also provides a keyboard combination that includes a keyboard and a soft protective cover. The keyboard consists of a base plate and a plurality of buttons, and the side of the base plate has at least a protruding snap-fit structure. And a plurality of buttons are respectively disposed on the bottom plate. Each button includes a keycap and a lifting support device 'elevator' disposed between the bottom plate and the keycap, and the keycap is movable up and down relative to the bottom plate by the lifting and lowering device. The structural design of the soft protective cover is as described above. This creation also provides a soft protective cover that covers the input device. The input device has a plurality of buttons, and the flexible protective cover includes a sheet-like body, a plurality of hollow protruding structures, and a snap plate. The side of the sheet-like body has at least a fixing hole structure, and a plurality of hollow protruding structures are formed at positions where the sheet-like body corresponds to a plurality of buttons. The side of the engaging plate is extended to form a protruding engaging structure at a position corresponding to the m-fixing structure. When the sheet-shaped main body and the engaging plate are coated and the protruding engaging structure is disposed on the fixing hole structure, the protruding card is protruded. The end of the structure is pressed down to fix the hole structure, so that each hollow protruding structure is tightly covered on the corresponding button. 5 M06211 In summary, the creation uses the protruding engagement structure formed on the side of the input device (such as the keyboard) and the fixed hole structure on the side of the sheet-shaped main body of the shaft, and the end of the engagement structure protrudes. The snap-in structure is worn on the boring structure, and the lower disc = structure 'so that each hollow projection structure is tightly covered by the corresponding button: and the edge of the soft pulp cover is read and the number of people lost is __ The effect of the gap between the edges. In addition, this creation can also be additionally provided with side extensions to form the card σ, and the structure of the engagement plate, by the engagement between the protruding engagement structure of the engagement plate and the chimney structure of the side of the sheet-like body of the soft protective cover 'Let the per-hollow protruding structure tightly = cover the disc on the corresponding button, and let the sheet-like main body and the engaging plate together cover the input to prevent the entry of the soldier into the inside of the wheeling device.曰About the merits and spirit of this creation can be further elaborated by the following details of the creation and the drawings; h" [Embodiment] Referring to Fig. 1 and Fig. 2, Fig. 1 is a combination diagram of a keyboard combination 1 according to a preferred embodiment of the present invention, and Fig. 2 is an exploded view of the keyboard combination of Fig. 1. As shown in FIGS. 1 and 2, the keyboard assembly 1 includes a keyboard 3 and a flexible protective cover 5, and the keyboard 3 includes a bottom plate 7 and a plurality of buttons 9. The button 9 is disposed on the bottom plate 7, and the flexible protective cover 5 covers the keyboard 3. It is worth mentioning that the soft protection of this creation. The vine cover 5 can also be applied to an input device (such as a computer) generally having a button and a bottom plate to prevent foreign matter from entering a gap between the button M406211 and the button of the input device generally having a button and a bottom plate. For the sake of simplicity, the following input devices are exemplified by a keyboard. As for the soft protective cover of the input device having a button and a bottom plate, the structure can be deduced so that the structural design thereof will not be repeated here. See Figure 3 for the eye, and Figure 3 is the keyboard combination in Figure 1. Along the line, the map. As shown in FIG. 3, the keyboard 3 further includes a circuit board n disposed on the bottom plate 7. • Further, each button 9 includes a lifting support device 13, an elastic member 15, and a keycap n. The φ lifting support device 13 is disposed between the bottom plate 7 and the keycap 17. Further, the keycap 17 has a first chute 19 and a first card slot 21, and the bottom plate 7 has a second chute 23 and a second card slot 25. Lift support device! 3 includes a first support member π α and a second support member 29 ′ wherein the second binding member 29 is pivotally coupled to the first cutting member 27 . The first reading member 27 has a first sliding portion 31 and a first pivotal portion 33. When the first support member 27 is assembled, the first sliding portion 3! is slidably disposed in the first sliding slot 19, and the first pivoting portion 33 is rotatably pivotally coupled to the second locking slot 25. The second list member 29 has a second sliding portion ^ and a second pivot portion 37. When the second member 29 is assembled, the second sliding portion % is slidably disposed. The second sliding portion 23 is disposed in the second sliding slot 23 and the two pivoting members are rotatably nested in the first slot η. The structural connection design allows the keycap 17 to be moved up and down relative to the bottom plate 7 by the lifting support device 13. The other elastic member 15 is also disposed between the keycap 17 and the bottom plate 7 as a source of the force required for the keycap to move up and down relative to the bottom plate 7, wherein the elastic member 丨5 can be compared with the rubber=(Qin-, but not In addition, the switch on the board u "female" · 9 (not shown), such as the membrane switch (four) pool torn pure) 7 M406211 or its trigger switch. When the button 9 of the button 9 is When pressed, the elastic member ι5 triggers the switch on the circuit board 11 to perform the function that the user desires to input. As shown in FIGS. 2 and 3, the side of the bottom plate 7 extends to form at least a protruding engagement structure. 41 (one shown in FIG. 3) 'The soft protective cover 5 includes a sheet-like body and a plurality of hollow protruding structures 45', wherein each of the hollow protruding structures 45 has an accommodating space 46. The hollow protruding structure 45 is formed in a sheet shape The main body 43 corresponds to the position of the plurality of buttons 9. In other words, the accommodating space 46 of each of the hollow protruding structures 45 corresponds to one of the plurality of buttons 9. Therefore, when the flexible protective cover 5 covers the keyboard 3, Each button 9 can be accommodated in a corresponding hollow protrusion The embossed accommodating space 46. Further, the inverted edge of the sheet-like main chain 43 has a fixing hole structure 47 corresponding to the position of the protruding structure 4 。. In this embodiment, the protruding engaging structure 4H is preferably The z-shaped structure 'and the sheet-like main body 43 and the hollow protruding structure 45 are preferably made of a rubber material. Since the rubber material has elasticity, the fixing hole structure 47 formed on the sheet body 43 can be stretched. It is elastically enlarged or reduced, and the rubber material can also provide the user with a better touch when using the keyboard 3. The material is to cover the π" _ - Qian Qian. The fixing hole structure 47 of the first human protective cover 5 and the protruding engaging phase of the keyboard 3 are the face-shaped structure 47. In the protruding card joints, the end of the snap-fit structure 41 is located at the end of the fixed-hole structure 47. _, (four) tree coffee protection = 3. At this time, each of the soft-protected structures 45 accommodates the keyboard M4Ub211, the button 9-' and closely covers the corresponding button 9. Further, the flexible protective cover 5 can be engaged with the protruding engaging structure of the keyboard 3 by the fixing hole structure 47 to seal the gap between the edge of the soft protective cover 5 and the keyboard 3 to prevent the foreign matter from entering the gap. The effect. then. Referring to Fig. 3 and Fig. 4, Fig. 4 is a perspective view of the soft protective cover 5 shown in Fig. As shown in FIG. 3 and FIG. 4, in order to strengthen and make each hollow protruding structure 45 tightly cover the corresponding button 9, the above-mentioned sheet-like body 43 has at least a fixing column 49' per-fixing column. It is formed at a position between two adjacent hollow and large structures 45. The fixing post 49 is used to pass through the hole j 4 in the bottom plate 7 to reinforce the relative position of the fixed main body 43 and the bottom plate 7. As for how to determine the position of the 2's solid column 49 on the sheet-like body a, it depends on the fixing requirements of the soft protective cover 5 and the bottom plate 7 in practical applications. In the real part, the top surface of each hollow projection 45 may have a button pattern 48' to correspondingly display the pattern of the button 9 covered by it. In this way, the user can operate the _ 3 according to the button _ 48, and the function of the person who is composing the peak. The button pattern 48 can be formed on the hollow projecting structure μ by screen printing or laser engraving. As for screen printing or laser engraving, it is common in the conventional technology, so it is no longer mentioned here that each button pattern can be sprayed with a polyamine formic acid (ah).
Urethane, PU)塗料保謹屏，田，、，μ 隻層用以保護按鍵圖樣48免於因被使用者碰 觸而磨損。 立π务閱第5圖，其為根據本創作另一實施例之鍵盤組合r之部份 剖面示意圖。鍵盤組合丨，與上述之鍵盤組合丨的主要不同之處在於，. 鍵^組合1’之軟性健蓋5,更包含卡合板51，用以加強鍵盤組合1， 勺、《構強度。如第5圖所示’卡合板51之側邊對應固定孔結構47 之位置上延伸形成有突出卡合結構彳丨。卡合板51係用來與片狀主 體43共同包覆鍵盤3。當片狀主體43與卡合板51共同包覆鍵盤3 且突出卡合結構41 ?設於固定孔結_上時，突出卡合結料 . 之端部下壓固定孔結構47，藉以使每-中空突出結構45緊密覆蓋 =相對應之按鍵9上。於實際應用中，卡合板51可以柳接或其它固· 疋方式與鍵盤3之底板7結合。需注意的是，第5圖與第3圖中相 同標號的元件，其侧原理大致相同，故在此不再贊述。 咖相較於先前技術，本創作彻形成於輸人裝细如鍵盤)側邊之 突出卡合結構以及形成於軟性保護蓋之片.狀主體側邊之固定孔結 構’使姆合結構之端部於突出卡合結構穿設於固定孔結構均 下壓固疋聽構’藉以使每—中找出結猜密覆蓋於相對應之按 鍵上’且密封軟性保護蓋之邊緣與鍵盤之間關隙，以達到阻止里 的功效。此外，本創作亦可額外增設側邊延伸 伴^4^狀合ί叙卡合板’ #由卡合板之突計合結構與軟性 曼盘⑽王韻叙固定孔結構間的配合，使每—卜.….，， 構緊密覆蓋於減應之按鍵上 κ訪 止異物進人輸：=合板共同包覆輪 10 M406211 【圖式簡單說明】 第1圖為根據本創作-健實施例之鍵盤組合之組合圖。 第2圖為第1圖之鍵盤組合之爆炸圖。 第3圖為第丨圖之鍵盤組合沿χχ線之剖面圖。 第4圖為第1圖所示之軟性保護蓋於另-視角之立體圖。 第5圖為根據本創作另—實施例之鍵盤組合之部份剖面 【主要元件符號說明】 1 ' 1' 鍵盤組合 5、5丨 軟性保護蓋 9 按鍵 13 升降支撐裝置 19 第一滑槽 23 第二滑槽 27 第一支撐件 31 第一滑動部 35 第二滑動部 15 彈性件 43 片狀主體 46 容置空間 3 鍵盤 7 底板 11 電路板 17 鍵帽 21 第—Ν曹 25 第二卡槽 29 第二支撐件 33 第一樞接部 37 第二樞接部 41 突出卡合結構 45 中空突出結構 47 固定孔結構 M406211 48 按鍵圖樣 49 固定柱 51 卡合板Urethane, PU) Coatings, screens, fields, and μ layers are used to protect the button pattern 48 from wear and tear due to user contact. Figure 5 is a cross-sectional view showing a portion of a keyboard combination r according to another embodiment of the present invention. The main difference between the combination of the keyboard and the above keyboard is that the soft cover 5 of the key combination 1' further includes a snap-in plate 51 for reinforcing the keyboard combination 1, the spoon, and the "strength." As shown in Fig. 5, the side of the engaging plate 51 is formed with a protruding engaging structure 延伸 at a position corresponding to the fixing hole structure 47. The engaging plate 51 is used to cover the keyboard 3 together with the sheet-like main body 43. When the sheet-like main body 43 and the engaging plate 51 together cover the keyboard 3 and the protruding engaging structure 41 is disposed on the fixing hole _, the end portion of the protruding engaging material is pressed down to fix the hole structure 47, thereby making each hollow The protruding structure 45 is tightly covered = corresponding to the button 9. In practical applications, the engaging plate 51 can be combined with the bottom plate 7 of the keyboard 3 in a splicing or other solid manner. It should be noted that the components of the same reference numerals in Fig. 5 and Fig. 3 have substantially the same side principle, and therefore will not be described here. Compared with the prior art, the present invention is formed in the protruding engaging structure on the side of the input device such as the keyboard and the fixed hole structure formed on the side of the flexible protective cover. The protruding engaging structure is disposed in the fixing hole structure and is pressed and fixed to the hearing structure, so that the knot is covered on the corresponding button, and the edge of the sealing soft protective cover is closed between the keyboard and the keyboard. Gap to achieve the effect of blocking. In addition, this creation can also be additionally added with side extensions with ^4^ ί 卡 卡 ' ' ' # _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .,, The structure is tightly covered on the button of the subtraction. κVisit the foreign object into the person: =Plate the common wrap wheel 10 M406211 [Simple diagram of the drawing] Figure 1 is the combination of the keyboard combination according to the present creation-health embodiment Figure. Figure 2 is an exploded view of the keyboard combination of Figure 1. Figure 3 is a cross-sectional view of the keyboard combination of the second figure along the squall line. Fig. 4 is a perspective view of the soft protective cover shown in Fig. 1 in another perspective view. Figure 5 is a partial cross-section of the keyboard combination according to another embodiment of the present invention. [Main component symbol description] 1 '1' Keyboard combination 5, 5丨 soft protective cover 9 Button 13 Lifting support device 19 First chute 23 Two chutes 27 First support member 31 First sliding portion 35 Second sliding portion 15 Elastic member 43 Sheet-like main body 46 accommodating space 3 Keyboard 7 Base plate 11 Circuit board 17 Key cap 21 No. Ν 25 Second card slot 29 Second support member 33 first pivoting portion 37 second pivoting portion 41 protruding engaging structure 45 hollow protruding structure 47 fixing hole structure M406211 48 button pattern 49 fixing column 51 engaging plate