M423299 五、新型說明： 【新型所屬之技術領域】 本新型是有關於一種按鍵，特別是指一種組裝簡單的 按鍵。 、β 【先前技術】 參閱圖1、2,現有的按鍵1是由一金屬底板丨丨、一電 路板12、-彈性復位件13，及一供按壓的鍵帽14依序組 裝而成。 該金屬底板11施以例如模具成形而具有相對應的凹凸 結構的圖案表面111，用以和該彈性復位件13的結合。 該電路板12叠置於該金屬底板njl，並具有°董;應於該 金屬底板11的圖案表面m而設計的預定線路圖案。 該彈性復位件13包括一支撐架131及一彈性體132, 該成框形的支撑架131為習知的剪刀腳升降結構兩同側 端部分別連接於該鍵帽14與該金屬底板u的圖案表面^ 上，使得該鍵帽—14可相對於該金屬底板u上下位移；該彈 性體132 &以例如橡膠材料製成而具有彈性回復力而設置 於該電路板u與該鍵帽14之間，而在按壓該鍵帽14時， 連動該彈性體132形變而累積彈性回復力並同時接觸該電 路板12上而傳遞出電訊號，#外力消失後，該彈性體132 釋放出彈丨生回復力而頂抵該鍵帽14遠離該電路板12。 現有的按鍵1的缺點在於該金屬底板u為了配合該彈 歧復位件13、支樓架131的設置，而必須以例如用模具成 形出固置該支樓架131的凹凸結構的圖案表面⑴，如此除 3 了造成製作成本無法降低的問題之外，也造成後續電路板 12為因應該彈性復位件13的設置，而出現電路佈局設計受 限等諸多問題。 此外，為了在光線較不充足的地方也能看清按鍵而使 用，目前以如圖1、2所示的按鍵為基礎，並將該鍵帽14 改採用透明材料製作，及加裝一導光件15而發展出如圖3 所示的可透光的按鍵1，，也會因為受限於該金屬底板11的 圖案表面111，而使得具有叠置的導光片、反射片等結構的 導光件15只能設置於該金屬底板11相反於該鍵帽14的底 面’而這樣的結構，其實會讓經由該導光件15導引的光線 大部分都被該金屬底板11反射或遮蔽了，所以實際亮度並 不高、發光也不均勻，而未能達成當初設計發光鍵盤的本 意。 【新型内容】 因此，本新型之目的，即在提供一種加工成本降低、 組裝新穎的按鍵。 於是，本新型按鍵，包含一金屬底板、一固持框、一 鍵帽’及一彈性復位件。 該固持框與該金屬底板連接並相配合界定出一容置空 間。 該鍵帽包括一凸伸出該固持框的帽體，及一自該帽體 底緣向外延伸的帽沿。 該彈性復位件設置在該容置空間中並恆施力推使該帽 體遠離該金屬底板，而使該鍵帽以該帽沿靠抵該固持框而 M423299 被限位。. 本新型之功效在於：藉由該固持框和金屬底板的裝配 ，令本新型按鍵在該金屬底板上的構造簡化，減低金屬模 具、電路板等的加工成本，而一樣能達到按鍵整體構造穩 固、甚至效能更穩定的要求。 【實施方式】 有關本新型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二個較佳實施例的詳細說明中，將可 清楚的呈現。 在本新型被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖4與圖5，本新型按鍵之—第—較佳實施例包含 一金屬底板2、一固持框3、一鍵帽4、一電路板5，及一 彈性復位件6。 該金屬底板2是一平整的而不需特別加工的板體，包 括多個嵌槽210，在本例中以四個嵌槽21〇為說明，且分別 間隔形成於該金屬底板2的四個角落。 該固持框3連接於該金屬底板2的表面上並包括一遠 離該金屬底板2且具有一穿孔31〇的框本體31，及四個間 隔地由該框本體31朝該金屬底板2延伸凸出的結合支腳& 。該固持框3以該等結合支腳32插設至該金屬底板2相對 應嵌合的嵌槽210而令該固持框3固接於該金屬底板2上 ，並相配合界定出一與該穿孔310相連通的容置空間8。在 此補充說明的是，該等結合支腳32的數目、位置是相對於 5 M423299 該金屬底板2上的嵌槽210而設置，因此，其數量、位置 並不僅限於本例中圖式所揭露的態樣。 該鍵帽4套設於該固持框3中並包括一部分自該固持 框3的穿孔310凸出的帽體41’及一自該帽體41底緣向外 延伸的帽沿42。 該電路板5位於該容置空間8中並設置於該金屬底板2 的表面上，一般來說，該電路板5是薄膜電路板或是印刷 電路板。 該彈性復位件6設置在該容置空間8中並恆施力推使 該鍵帽4遠離該金屬底板2，當未施力於該鍵帽4時，該彈 性復位件6推使該鍵帽4遠離該金屬底板2，並藉該鍵帽4 的帽沿42靠抵該固持框3的框本體31而被限位、不會脫 離整體的按鍵結構，當施力按壓該鍵帽4時，該鍵帽4往 該金屬底板2靠近，並連動該彈性復位件6抵觸該電路板5 而傳出電訊號。 在本例中’該彈性復位件6包括一彈性體61，及二相 互樞接且同側端分別連接於該鍵帽4與該固持框3的支撐 架62 ’其中，該彈性體61是橡膠製品或彈簧等具有彈性回 復力的物件’該二支撐架62成一般常見的剪刀腳支撐結構 。在本實施例中該彈性體01是以橡膠構成的並設置於該鍵 帽4與該電路板5之間，且該二支撐架62的同側端連設於 該固持框3上作說明，而在按壓該鍵帽4時，連動該彈性 體61形變而累積彈性回復力並同時接觸該電路板$上而傳 遞出電訊號，當外力消失後，該彈性體61釋放出彈性回復 6 M423299 力並配合該二支擇架62的擇持而頂抵該鍵帽4遠離該電路 板5。 由上述說明可知，本新型按鍵的金屬底板2不需再形 成複雜的結構設計以供該彈性復位件6設置，所以能保持 平整、簡單的板體態樣’而可以大幅降低成本較高的金屬 加工製程，從而改善現有的按鍵1的缺點。另外，由於該 金屬底板2的表面平整，所以電路板5也不需再配合該金 屬底板的態樣而受限，對於降低製作成本有相當的助益。 參閱圖6,本新型按鍵之一第二較佳實施例與上述第一 較佳實施例相似，其不同處僅在於本第二較佳實施例還包 含一夾設於該電路板5與金屬底板2間的導光件7，另外， 該鍵帽4的帽體41採用可透光材質的材料構成，而可用於 組裝發光鍵盤。 該導光件7包括一位於該金屬底板2上的反射片71， °又置於該反射片71上的導光板72，及一設置該導光板 72上的保護片73，用以將來自兩侧的光線（圖未示）導入 該容置空間8中而令光線朝該鍵帽4的帽體41方向行進。 该導光板72用以將外部進入的光線混光後藉由光學反射、 折射使付光線以面光源的形式朝該鍵帽4的方向射出；該 反射片71用以將更多朝底部前進的光反射回該導光板72 中；而該保護片73則具有一定的透光性，在保護該導光板 72的同時亦不會遮蔽朝該鍵帽4行進的光，而使得光線到 達該鍵帽4後透出至外界，如此，便可在光線不足處也能 清楚的看見按鍵。 7 M423299 特別值得一提的是，該第二較佳實施例的導光件7是 設置於該由該金屬底板2與該鍵帽4所界定的容置空間8 中’除了可進-步地藉該金屬底板2的保護避免外力受損 之外，由該導光件7離開朝該鍵帽4前進的光不會如現有 的可透光按鍵1’（見圖3)—樣被金屬底板所遮蔽，透光亮 度將可大幅增加。 細上所述，本新型是利用該固持框3與金屬底板2的 配合’提供-種新的組裝結構的按鍵，而可令本新型按鍵 的金屬歧2不需額外製作供彈性復位件連結的圖案表面 不僅減低了使用模具成形的加工成本以及避免電路板 設計受限關題，同時，更進—步地能將各元件設置於該 固持框3與該金屬底板2配合而出的容置空間8中，使得 整體按鍵結構更加穩固、性能也更加平穩，故確實能達成 本新型之目的。 惟以上所述者，僅為本新型之較佳實施例而已，當不 能以此限定本新型實施之範圍，即大凡依本新型申請專利 範圍及新型說明内容所作之簡單的等效變化與修飾，皆仍 屬本新型專利涵蓋之範圍内。 【圖式簡單說明】 圖1是一立體分解圖，說明一現有的按鍵； 圖2是一側視示意圖’說明該按鍵結構； 圖3是一側視示意圖’說明現有的一可透光的按鍵； 圖4是一立體分解圖，說明本新型的一第一較佳實施 例； ‘ 8 M423299 圖5是一側視示意圖，說明該第一較佳實施例結構； 圖6是一側視示意圖，說明本新型的一第二較佳實施 M423299 【主要元件符號說明】 2 ....... •…金屬底板 5…… ••…電路板 210… —嵌槽 6…… ••…彈性復位件 3 ....... …·固持框 61… ••…彈性體 31…… ----框本體 62.... ••…支撐架 310… •…穿孔 7…… ••…導光件 32…… •…結合支腳 71 .... •…反射片 4 ....... •…鍵帽 72····. ••…導光板 41…… •…帽體 73 ‘‘… .....保5蒦片 42…… •…帽沿 8…… …·容置空間 10M423299 V. New description: [New technical field] The present invention relates to a button, in particular to a button that is simple to assemble. [beta] [Prior Art] Referring to Figures 1 and 2, the conventional button 1 is assembled by a metal bottom plate, a circuit board 12, an elastic return member 13, and a key cap 14 for pressing. The metal base plate 11 is applied with a pattern surface 111 having a corresponding uneven structure such as a mold for bonding with the elastic return member 13. The circuit board 12 is stacked on the metal base plate nj1 and has a predetermined line pattern designed to be designed on the pattern surface m of the metal base plate 11. The elastic restoring member 13 includes a support frame 131 and an elastic body 132. The frame-shaped support frame 131 is connected to the key cap 14 and the metal bottom plate u at the same side ends of the conventional scissor lift structure. The pattern surface is such that the key cap 14 can be displaced up and down with respect to the metal base plate u; the elastic body 132 & is made of, for example, a rubber material and has an elastic restoring force and is disposed on the circuit board u and the key cap 14 When the key cap 14 is pressed, the elastic body 132 is deformed to accumulate elastic recovery force and simultaneously contact the circuit board 12 to transmit an electric signal. After the external force disappears, the elastic body 132 releases the magazine. The restoring force is applied to the keycap 14 away from the circuit board 12. A disadvantage of the conventional button 1 is that the metal base plate u has to be formed with a mold to form a pattern surface (1) for fixing the concave-convex structure of the branch frame 131 in order to match the arrangement of the spring restoring member 13 and the branch frame 131. In addition to the problem that the manufacturing cost cannot be reduced, the subsequent circuit board 12 is caused by the arrangement of the elastic reset member 13, and the circuit layout design is limited. In addition, in order to be able to see the button in a place where the light is insufficient, it is currently based on the buttons shown in Figs. 1 and 2, and the key cap 14 is made of a transparent material, and a light guide is added. The light-transmissive button 1 as shown in FIG. 3 is developed, and the structure of the light guide sheet, the reflection sheet, and the like, which are stacked, is also limited by the pattern surface 111 of the metal base plate 11. The light member 15 can only be disposed on the bottom surface of the metal bottom plate 11 opposite to the bottom surface of the key cap 14 , and the light guided through the light guide member 15 is mostly reflected or shielded by the metal base plate 11 . Therefore, the actual brightness is not high, and the illumination is not uniform, and the original intention of designing the illuminated keyboard cannot be achieved. [New content] Therefore, the object of the present invention is to provide a button with reduced processing cost and novel assembly. Thus, the novel button includes a metal bottom plate, a holding frame, a keycap' and an elastic return member. The holding frame is coupled to the metal base plate and cooperates to define a receiving space. The keycap includes a cap protruding from the retaining frame and a brim extending outwardly from the bottom edge of the cap. The elastic returning member is disposed in the accommodating space and is constantly biased to push the cap away from the metal base plate, so that the key cap is restrained by the cap rim against the holding frame M423299. The utility model has the advantages that the assembly of the holding frame and the metal base plate simplifies the structure of the new type of button on the metal base plate, reduces the processing cost of the metal mold, the circuit board, etc., and can achieve the stable overall structure of the button. Even more stable requirements. The above and other technical contents, features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. Referring to Figures 4 and 5, the preferred embodiment of the present invention comprises a metal base plate 2, a holding frame 3, a keycap 4, a circuit board 5, and an elastic return member 6. The metal base plate 2 is a flat plate body that does not need special processing, and includes a plurality of recessed grooves 210. In this example, four recessed grooves 21A are illustrated, and four are respectively formed on the metal base plate 2. corner. The holding frame 3 is connected to the surface of the metal base plate 2 and includes a frame body 31 which is away from the metal base plate 2 and has a through hole 31〇. The frame body 31 extends from the frame body 31 toward the metal base plate 2 at four intervals. Combination of feet & The holding frame 3 is inserted into the corresponding recessed groove 210 of the metal base plate 2 to fix the holding frame 3 to the metal base plate 2, and cooperates to define a hole and the through hole. The 310 is connected to the accommodating space 8. It is added that the number and position of the coupling legs 32 are set relative to the slot 210 on the metal base plate 2 of 5 M423299. Therefore, the number and position thereof are not limited to those disclosed in the figure in this example. The way. The key cap 4 is sleeved in the holding frame 3 and includes a cap portion 41' protruding from the through hole 310 of the holding frame 3 and a brim 42 extending outward from the bottom edge of the cap body 41. The circuit board 5 is located in the accommodating space 8 and is disposed on the surface of the metal base plate 2. Generally, the circuit board 5 is a thin film circuit board or a printed circuit board. The elastic returning member 6 is disposed in the accommodating space 8 and constantly pushes the keycap 4 away from the metal base plate 2. When the keycap 4 is not applied, the elastic returning member 6 pushes the keycap 4, away from the metal bottom plate 2, and by the cap 42 of the keycap 4, the frame body 31 of the holding frame 3 is restrained from being removed from the overall button structure, and when the key cap 4 is pressed by force, The key cap 4 approaches the metal base plate 2, and the elastic return member 6 is interlocked with the circuit board 5 to transmit an electrical signal. In this example, the elastic returning member 6 includes an elastic body 61, and two elastically connected ends, and the same side ends are respectively connected to the keycap 4 and the support frame 62' of the holding frame 3, wherein the elastic body 61 is rubber. An article having an elastic restoring force such as a product or a spring's two support frames 62 is a common scissor foot support structure. In this embodiment, the elastic body 01 is made of rubber and is disposed between the keycap 4 and the circuit board 5, and the same side end of the two support frames 62 is connected to the holding frame 3 for illustration. When the keycap 4 is pressed, the elastic body 61 is deformed to accumulate elastic restoring force and simultaneously contact the circuit board $ to transmit an electric signal. When the external force disappears, the elastic body 61 releases an elastic return 6 M423299 force. And the key cap 4 is offset from the circuit board 5 by the selection of the two support frames 62. It can be seen from the above description that the metal base plate 2 of the new type of button does not need to form a complicated structural design for the elastic reset member 6 to be disposed, so that the flat and simple plate body state can be maintained, and the metal processing with high cost can be greatly reduced. The process is to improve the disadvantages of the existing button 1. In addition, since the surface of the metal base plate 2 is flat, the circuit board 5 does not need to be constrained to match the metal base plate, which is quite advantageous for reducing the manufacturing cost. Referring to FIG. 6, a second preferred embodiment of the present invention is similar to the first preferred embodiment described above, except that the second preferred embodiment further includes a circuit board 5 and a metal backplane. The two light guides 7 and the cap 41 of the keycap 4 are made of a material that can be made of a light-transmitting material, and can be used to assemble an illuminated keyboard. The light guide member 7 includes a reflective sheet 71 on the metal base plate 2, a light guide plate 72 disposed on the reflective sheet 71, and a protective sheet 73 disposed on the light guide plate 72 for The side light (not shown) is introduced into the accommodating space 8 to cause the light to travel in the direction of the cap 41 of the keycap 4. The light guide plate 72 is configured to mix the externally entering light and then optically reflect and refract the light to be emitted in the direction of the keycap 4 in the form of a surface light source; the reflective sheet 71 is used to advance more toward the bottom. The light is reflected back into the light guide plate 72. The protective sheet 73 has a certain light transmissivity. When the light guide plate 72 is protected, the light traveling toward the keycap 4 is not blocked, so that the light reaches the key cap. After 4, it will be exposed to the outside world. In this way, the button can be clearly seen in the low light. 7 M423299 It is particularly worth mentioning that the light guiding member 7 of the second preferred embodiment is disposed in the accommodating space 8 defined by the metal bottom plate 2 and the keycap 4, except that it can be further advanced. By the protection of the metal base plate 2 to avoid damage to the external force, the light that is moved away from the light guide member 7 toward the keycap 4 is not like the existing opaque button 1' (see FIG. 3). The brightness of the light will be greatly increased. As described in detail, the present invention utilizes the cooperation of the holding frame 3 and the metal base plate 2 to provide a new assembly structure of the button, so that the metal profile 2 of the new button can be made without additional connection for the elastic reset member. The surface of the pattern not only reduces the processing cost of forming the mold, but also avoids the limitation of the design of the circuit board. At the same time, the components can be disposed in the accommodating space of the holding frame 3 and the metal base plate 2. In the eighth, the overall button structure is more stable and the performance is more stable, so the purpose of the novel can be achieved. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention cannot be limited thereto, that is, the simple equivalent change and modification made by the novel patent application scope and the novel description content, All remain within the scope of this new patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a conventional button; FIG. 2 is a side view showing the button structure; FIG. 3 is a side view showing a conventional light-transmitting button 4 is an exploded perspective view showing a first preferred embodiment of the present invention; '8 M423299 FIG. 5 is a side view showing the structure of the first preferred embodiment; FIG. 6 is a side view showing DESCRIPTION OF THE PREFERRED EMBODIMENT A second preferred embodiment M423299 [Description of main component symbols] 2 ....... •...metal base plate 5... ••...circuit board 210...-fitting slot 6... ••...elastic reset Pieces 3 ....... ...· Holding frame 61... ••... Elastomer 31... ----Frame body 62.... ••...Support frame 310... •...Perforation 7... ••... Light guide 32... •...in combination with foot 71 .... •...reflector 4 ....... •...key cap 72····.••...light guide plate 41... •...cap 73 ''......保保5蒦42...•...Hat 8......·Receiving space 10